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Ntn Corporation patents


Recent patent applications related to Ntn Corporation. Ntn Corporation is listed as an Agent/Assignee. Note: Ntn Corporation may have other listings under different names/spellings. We're not affiliated with Ntn Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "N" | Ntn Corporation-related inventors


Magnetizing device for magnetic encoder

A magnetizing device includes a magnetization yoke including a pair of magnetization heads confronting each other through a magnetic gap, an excitation coil wound around the magnetization yoke, and a magnetization power supply that supplies a magnetizing current to the excitation coil to generate magnetic flux between the magnetization heads. A magnetic shield is provided on the magnetization yoke. ... Ntn Corporation

Wheel bearing apparatus

The wheel bearing apparatus has hub bolts (6a) to fasten a wheel secured equidistantly around the wheel mounting flange (6). An annular groove (7a) is formed on the outer-side surface (7) of the wheel mounting flange (6). ... Ntn Corporation

Fixing band for constant-velocity universal joint boot

Provided is a fastening band including a steel plate (111) plated with a plating layer (110) as a base material. The plating layer (110) has a self-repairing function of forming a protective film (112) on a plating peeling part with a component dissolved from the plating layer. ... Ntn Corporation

Friction brake system

The friction brake system includes a braking force distributor configured to output load command values to friction brake devices for a plurality of wheels, and a friction coefficient estimation calculation section configured to estimate a friction coefficient between a brake rotor and a friction material of each friction brake device. The friction coefficient estimation calculation section includes a distribution adjustment section configured to change distribution of brake pressing force to be distributed by the braking force distributor, for estimation of the friction coefficient, and an estimation calculation section configured to estimate the friction coefficient on the basis of a relationship between deceleration of a vehicle and the load command values the distribution of which is changed.. ... Ntn Corporation

Tapered roller bearing

To provide a tapered roller bearing provided with a retainer formed of resin capable of being molded by using a simple molding die, and capable of retaining a tapered roller stably when the tapered roller and the retainer are integrated, and capable of improving mechanical strength and lubricating performance on a guide surface as needed. A retainer 5 in the tapered roller bearing is formed of an injection molded body formed by injection molding a resin composition. ... Ntn Corporation

Motor drive device for automobile and equipped with speed reducer

An automobile-motor driving device equipped with speed reducer which has improved supply of lubrication oil to inside of the rolling bearings without sacrificing the function of the bearings, to reduce deformation in the rolling bearing outer ring. A parallel shaft gear speed reducer provides an automobile-motor driving device equipped with speed reducer. ... Ntn Corporation

Motor drive device

A lubricating oil temperature sensor to detect a temperature of a lubricating oil is provided in a lubricating oil passage in a speed reducer, a coil temperature sensor to detect a temperature of a motor coil is provided in a stator of an electric motor, and a rotation speed detection sensor to detect a rotation speed of the electric motor is provided. A control device includes: an abnormality detector to detect an abnormality in the lubricating oil temperature sensor; and a lubricating oil temperature estimator to estimate the temperature of the lubricating oil on the basis of a determined relationship using the temperature detected by the coil temperature sensor and the rotation speed detected by the rotation speed detection sensor, when the abnormality detector detects the abnormality in the lubricating oil temperature sensor.. ... Ntn Corporation

Fixed constant velocity universal joint and method for assembling fixed constant velocity universal joint

A fixed type constant velocity universal joint includes an outer joint member including a cup section and a hollow shaft section, an inner joint member having a radially inner hole to allow one end of a shaft to be coupled thereto, and torque transmitting balls arranged in ball tracks formed of pairs of track grooves of the outer and inner joint members. The universal joint also includes a cage interposed between a radially inner surface of the outer joint member and a radially outer surface of the inner joint member and configured to retain the torque transmitting balls, and a stopper that regulates a maximum operating angle. ... Ntn Corporation

Retainer for bearing and bearing

The present invention relates to a retainer for a bearing. The retainer is entirely formed into an annular shape and has a crown shape. ... Ntn Corporation

Rolling bearing

To provide a rolling bearing having excellent rust prevention capability and capable of being used for a long period of time in a highly corrosion environment. A rolling bearing 1 utilized for a power generator which generates power from natural energy or for generator equipment has one or more bearing members which form the bearing having a rust prevention film formed in a predetermined region of a surface of a base material. ... Ntn Corporation

Vehicle orientation control device

A vehicle orientation control device is provided in a four wheel drive vehicle capable of applying braking and driving force to each of the vehicle wheels. The vehicle orientation control device (24) is provided in a vehicle control device (10) for controlling the four wheel drive vehicle and includes a standard yaw rate calculating unit (25), a yaw rate sensor (22), a target yaw moment calculating unit (26), a braking and driving force commanding unit (15), and a yaw moment control unit (27). ... Ntn Corporation

Device for determining wheel fastening state using server

Provided is a device for determining a wheel fastening state that allows a wheel fastening state to be monitored during running. The device includes a sensor unit (3) that is attachable to and detachable from a wheel fastening part, an information terminal (4) that is an in-vehicle device (4a) or a portable terminal (4b), and a server (30). ... Ntn Corporation

Ntn Corporation

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Rotation method, inspection method, method of manufacturing bearing, bearing, rotation apparatus, and inspection apparatus

A rotation method includes bringing a conical first cone having a first rotation shaft into contact with a spherical body to be rotated at a first contact point of the spherical body from a first direction along the first rotation shaft and bringing a conical second cone having a second rotation shaft into contact at a second contact point different from the first contact point of the spherical body from the first direction and rotating the spherical body around an axis extending in a direction along a line segment which connects the first contact point and the second contact point to each other while the first cone and the second cone are relatively pressed against the spherical body from the first direction.. . ... Ntn Corporation

03/22/18 / #20180079403

Electrically powered brake device

The electric brake device includes an electric motor, a friction member operator, a friction member, a brake rotor, and a control device. A braking force estimator provided in the control device includes: a direct estimator configured to convert output of a braking force sensor which detects a load or displacement corresponding amount, to a braking force; and an indirect estimator configured to estimate the braking force on the basis of information other than output of the braking force sensor. ... Ntn Corporation

03/15/18 / #20180073616

Ball screw

A ball screw (1, 10) has a bridge member (5) formed with a linking groove (5a) on its inner surface that makes the rolling track a circulating track. The bridge member (5) is fit into a bridge window (6, 9) formed on a barrel of a nut (3, 8). ... Ntn Corporation

03/15/18 / #20180073585

Electric brake device with parking function

A parking brake mechanism achieves a parking brake function using a friction material operation mechanism driven by a main brake motor. The parking brake mechanism includes a parking brake motor provided coaxially with one of rotational shafts transmitting a torque from the main brake motor to the friction material operation mechanism. ... Ntn Corporation

03/15/18 / #20180072295

Electrically powered brake device

This electric brake device includes: a brake rotor; a friction member; friction member operator configured to bring the friction member into contact with the brake rotor; an electric motor configured to drive the friction member operator; and a controller configured to control a braking force by means of the electric motor. The controller includes: heat balance degree estimator configured to estimate a balance degree among heat generation amounts of a plurality of exciting coils in the electric motor; and heat load balancing section configured to decrease a heat generation amount of a specific exciting coil when the heat balance degree estimator has estimated that the heat generation amount of the specific exciting coil among the plurality of exciting coils is larger than heat generation amounts of the other exciting coils.. ... Ntn Corporation

03/15/18 / #20180072289

Electric brake system and electric brake device

A brake integrated control section generates, as target values, a target braking force and a target wheel speed equivalent value of each electric brake device, and transmits the target braking force and the target wheel speed equivalent value to a target value transmitter. An electric brake control device of each electric brake device includes a braking force controller that controls an electric motor in accordance with the target braking force, a wheel speed controller that controls the electric motor in accordance with the target wheel speed equivalent value, and a control switcher. ... Ntn Corporation

03/08/18 / #20180066734

Hydraulic auto tensioner

A hydraulic auto-tensioner is provided which includes a cylinder, a valve sleeve, a rod, a spring seat, and a plunger slidably fitted on the outer diameter surface of the rod. A first leakage gap is defined between the fitting surfaces of the plunger and the rod. ... Ntn Corporation

03/08/18 / #20180065607

Electric brake system

An electric brake system includes a plurality of electric brake devices. A control device of each electric brake device includes: an abnormality determination section that determines whether there is abnormality in supply of power from a power supply device to the electric brake device; and a redundant function control section that, when the abnormality determination section has determined that there is abnormality in supply of power, controls the braking force by using an auxiliary power supply in accordance with a predetermined condition. ... Ntn Corporation

03/01/18 / #20180061562

Inductor and protection circuit

To provide an inductor capable of suppressing decrease of inductance in large current without magnetically saturating a magnetic core in large current of several thousand amperes like serge current and to provide a protection circuit using the inductor. The inductor is formed of an iron-based magnetic core 3 having a main coil 2 therein. ... Ntn Corporation

03/01/18 / #20180056394

Machine component and production method therefor

A machine part (an oil-impregnated bearing (1)) is obtained by subjecting a green compact to heat treatment in an oxidizing atmosphere (for example, in air), the green compact being obtained by compacting and forming raw material powder containing iron powder and copper powder. Iron particles (10) and copper particles (20) are bonded to each other with oxide films (11) and (21) formed on surfaces of the particles. ... Ntn Corporation

02/22/18 / #20180051747

Sintered bearing and method of manufacturing same

Provided is a sintered bearing formed mainly of an iron structure (33) and a copper structure (31) which are formed of a partially diffusion-alloyed powder (11) of an iron powder (12) and a copper powder (13). The sintered bearing includes a copper structure (31d) formed of a granular elemental copper powder (13′) having a grain diameter of 45 μm or less, the ratio of the copper structure (31d) being 10 mass % or less. ... Ntn Corporation

02/15/18 / #20180048071

Waveguide slot antenna and warning system using same

Provided is a waveguide tube slot antenna (a), including: a waveguide tube (10) having a transverse section having a rectangular shape in each part of a waveguide (2) in an extending direction thereof; and a plurality of radiating slots (3) arranged in the waveguide tube (10) at predetermined intervals, in which: the waveguide tube (10) includes a first waveguide tube forming member (11) and a second waveguide tube forming member (12) each having the transverse section having a shape with an end, the first waveguide tube forming member (11) and the second waveguide tube forming member (12) being configured to define the waveguide (2) by being coupled to each other; and the first waveguide tube forming member (11) is formed to have a flat shape and includes the plurality of radiating slots (3).. . ... Ntn Corporation

02/15/18 / #20180047492

Inductance element resin case and inductance element

The present invention facilitates positioning of contact surfaces of a resin case, core gap management, and assembling processing. A resin case 1 can house at least one magnetic core selected from a u-shaped magnetic core, a uu-shaped magnetic core, a ur-shaped magnetic core, and an i-shaped magnetic core. ... Ntn Corporation

02/15/18 / #20180045251

Boot attachment method and constant velocity universal joint

Provided is a boot mounting method for a constant velocity universal joint in which a boot end portion is mounted and fixed to a mating member made of metal. After the boot end portion is fitted over a receiving surface being a radially outer surface of the mating member, a high-frequency induction heating coil having a ring shape is fitted over the boot end portion. ... Ntn Corporation

02/15/18 / #20180045249

Tripod type constant velocity universal joint

Provided is a tripod type constant velocity universal joint, including: an outer joint member having track grooves; a tripod member including trunnion journals; and spherical rollers each fitted in a rotatable manner about each of the trunnion journals through intermediation of a plurality of needle rollers, in which a corner portion is formed at a root portion of the each of the trunnion journals so as to restrict movement of each of the plurality of needle rollers in the axial direction toward the root portion of the each of the trunnion journals by interference between an end surface corner rounded portion of the each of the plurality of needle rollers and the corner portion at the root portion.. . ... Ntn Corporation

02/15/18 / #20180045247

Sealed bearing assembly

A sealed bearing assembly includes seal members each including a seal lip formed with multiple protrusions, and arranged such that oil passages are formed between the seal lip and a seal sliding surface which slides circumferentially relative to the protrusions such that the oil passages communicate with the bearing internal space and the exterior of the bearing, and prevent passage of foreign objects having particle diameters larger than a predetermined value therethrough. The seal lip and the seal sliding surface are arranged such that when the bearing rotates, lubricating oil in the oil passages are pulled into the spaces between the seal lip and the seal sliding surface such that fluid lubricating condition is created between the seal lip and the seal sliding surface, due to the wedge effect.. ... Ntn Corporation

02/15/18 / #20180045246

Bearing part and rolling bearing

Each of an outer race (10), an inner race (11) and a ball (12) as a bearing part is a bearing part made of jis standard suj2 and having a carbonitrided layer formed in a surface thereof, wherein, after heat treatment at a heating temperature of 500° c. For a retention time of one hour is performed, a vickers hardness at a position with a depth of 0.02×t+0.175 (mm) from the surface is higher than a vickers hardness at a core portion, which is a region where the carbonitrided layer is not formed in a thickness direction of the bearing part, by not less than 80 hv, where t represents the time of carbonitriding treatment for forming the carbonitrided layer.. ... Ntn Corporation

02/15/18 / #20180043431

Magnetic core powder, dust core, and method for producing magnetic core powder

Provided is a powder (a) for a magnetic core for producing a powder magnetic core, the powder (a) for a magnetic core including: as a main component a granulated powder (1) obtained by granulating iron-based amorphous powder having been subjected to insulation treatment and having a particle size distribution falling within a range of from 1 μm to 200 μm; and glass powder having a softening point lower than a temperature of the annealing treatment. The granulated powder (1) is obtained by binding particles (2) of magnetic powder each formed of a particle (3) of the iron-based amorphous powder and an insulating coating (4) configured to coat the surface of the particle (3) to each other through use of a pva aqueous solution having a viscosity of from 3 mpa·s to 25 mpa·s.. ... Ntn Corporation

02/08/18 / #20180040405

Compression-bonded magnet with case and method for producing the same

There is provided a compression-bonded magnet with a case, which can realize high magnetic properties, high corrosion resistance and high durability strength even at low cost. The compression-bonded magnet with a case is a compression-bonded magnet with a case 1, comprising: a compression-bonded magnet 2 comprising a rare earth magnet powder such as an isotropic nd—fe—b magnet powder and a resin binder of a thermosetting resin; a case 3 for inserting the compression-bonded magnet 2; and a sealing member 4, wherein the compression-bonded magnet 2 is formed by compression-molding a mixture comprising the rare earth magnet powder and the resin binder into a green compact and curing the resin binder contained in the green compact, the rare earth magnet powder is contained in a large amount with respect to the entire compression-bonded magnet (for example, in a volume ratio of 85% to 90%), the sealing member 4 is fixed at an insertion opening part 3a of the case 3, and the compression-bonded magnet 2 is hermetically sealed by the sealing member 4 and the case 3.. ... Ntn Corporation

02/08/18 / #20180038412

Tapered roller bearing

The present invention provides a tapered roller bearing used in a planetary gear speed reducer, and including an outer race, and a retainer formed with a first annular portion, a second annular portion, and pillars. At least one retainer guiding surface (raceway) which guides the retainer in the radial direction is formed only on the inner periphery of the outer race. ... Ntn Corporation

02/01/18 / #20180031047

Constant velocity universal joint

A constant velocity universal joint has a large-diameter mounting portion fastened and fixed by a first fastening clamp onto a boot receiving portion of an outer joint member, and a small-diameter mounting portion fastened and fixed by a second fastening clamp onto a boot receiving portion of a shaft. A circumferential clamp groove to which the first fastening clamp is fitted is formed in an outer peripheral surface of the large-diameter mounting portion. ... Ntn Corporation

01/18/18 / #20180017142

Hydraulic auto-tensioner

A hydraulic auto-tensioner includes a rod inserted in a cylinder having a bottom and containing hydraulic oil, and a hydraulic damper in the cylinder for damping the push-in force that tends to push the cylinder and the rod in the direction in which the rod is pushed into the cylinder. An oil seal including a dust lip on the inner periphery thereof seals an open end of the cylinder. ... Ntn Corporation

01/18/18 / #20180017115

Electric linear motion actuator and electromechanical brake system

A locking mechanism capable of locking and unlocking the rotation of the rotor shaft of an electric motor is constituted by: a plurality of recesses formed in one side surface of one gear of a plurality of gears of a reduction gear mechanism; a locking pin movable toward and away from the recesses, and configured such that when the locking pin moves toward the recesses, the locking pin engages in one of the recesses, and locks the one gear; and a linear solenoid configured to move the locking pin toward and away from the recesses. A protrusion extends from one end surface of each recess.. ... Ntn Corporation

01/18/18 / #20180015909

Anti-lock brake control device

The anti-lock brake control device includes: a wheel motion estimator to estimate one or more of an angle, an angular velocity, and an angular acceleration of a wheel; a slip estimator to estimate a slip state of the wheel, using an estimation result of the wheel motion estimator; and an anti-lock controller to give a command for causing a brake device to reduce a braking force, in accordance with the estimated slip state of the wheel. The slip estimator includes delay compensators, such as one or a plurality of filters, which perform delay compensation for the estimation result of the wheel motion estimator. ... Ntn Corporation

01/18/18 / #20180015815

Two-motor vehicle drive device

A two-motor vehicle-driving apparatus is provided where the size of speed reducers in a radial direction is small. A motor shaft of the electric motor has an axial-through hollow structure. ... Ntn Corporation

01/11/18 / #20180010639

Roller bearing, retainer segment of roller bearing for supporting main shaft of wind-power generator, and main shaft support structure of wind-power generator

A tapered roller bearing (31a) has a plurality of retainer segments (11a, 11d) each having a pocket to house a tapered roller (34a), and arranged so as to be continuously lined with each other in a circumferential direction between an outer ring (32a) and an inner ring (33a). The retainer segment (11a, 11d) is formed of a resin containing a filler material to lower a thermal linear expansion coefficient. ... Ntn Corporation

01/11/18 / #20180009426

Electric brake device

An electric brake device includes: a brake rotor; a friction member; friction member contactor; an electric motor; braking force estimation unit; and a control device. The control device has a control system in which a motor rotation angle of the electric motor is included in a state quantity in a control computing of a follow-up control. ... Ntn Corporation

12/28/17 / #20170369007

Cable holding structure

A cable holding structure includes: an elastic member (23) having through holes (23h) through which cables (18) are passed; and a fixing portion (21, 22) having openings (21h, 22h) through which the cables are inserted, and disposed on a vehicle body-side member (19) to fasten the elastic member. The cables inserted through the through holes are restrained by the elastic member subjected to a fastening force.. ... Ntn Corporation

12/28/17 / #20170368873

Wheel bearing device

A wheel bearing device has a vehicle-body-mounting flange 5b with a plurality of ears 10 discontinuously formed in a circumferential direction on an outer circumferential surface of the outer member 5. An outer circumferential surface 11 on the outer side of the outer member is tapered and formed such that a diameter of the outer member gradually decreases in a direction to an outer side. ... Ntn Corporation

12/28/17 / #20170368872

Wheel bearing apparatus incorporated with a wheel speed detecting apparatus

A wheel bearing apparatus, incorporating a wheel speed detecting apparatus, has a mounting portion (17) on a cover body (15). It includes an insertion portion (17a) formed with a bottom insertion bore (22), and a cylindrical securing portion (17b). ... Ntn Corporation

12/28/17 / #20170368662

Grinding coolant supplier, grinding system and grinding method

A grinding coolant supplier configured to supply a grinding coolant to a grinder configured to grind an element of a machine part having a rolling element, the grinding coolant supplier including: a grinding coolant generation apparatus configured to generate a grinding coolant which is a mixture of a water-soluble stock coolant, a first reformed water of which water particles have an average particle size of not smaller than 80 nm and not greater than 150 nm, and a second reformed water of which water particles have an average particle size of not smaller than 5 nm and smaller than 80 nm; and grinding coolant supplying device configured to supply the generated grinding coolant to the grinder.. . ... Ntn Corporation

12/14/17 / #20170357195

Manufacturing method for peeling member

To provide a manufacturing method for a peeling member in which a non-adhesive resin film formed by fluororesin resin or the like is adhered to a metal plate, the method capable of manufacturing the peeling member which can prevent adhesion of a paper right after fixing for a long period of time with high productivity and without variations in quality. The manufacturing method for the peeling member provided with a peeling sheet 1a formed by a metal plate 2 and a non-adhesive resin film 4 adhered to the metal plate 2, the manufacturing method including a groove forming step of forming a pattern portion 5 formed by a plurality of recessed grooves on at least apart of a paper passing side surface of the non-adhesive resin film 4 along a longitudinal direction of the non-adhesive resin film 4 before the non-adhesive resin film 4 is adhered to the metal plate 2, and a film adhering step of adhering the non-adhesive resin film 4 obtained in the groove forming step such that the pattern portion 5 is arranged along at least a longitudinal direction of the distal end portion 2a of the paper passing side surface of the metal plate 2.. ... Ntn Corporation

12/14/17 / #20170356506

Driving force transmission mechanism

A driving force transmission mechanism includes a worm gear unit as a brake disposed between a driving motor and an electrically driven input gear, and is configured such that when a driving force is applied from the driving motor to the electrically driven input gear through the worm gear unit, an outer ring which rotates together with the electrically driven input gear becomes locked to an inner ring through rollers so that the driving force is transmitted to an output gear, which rotates together with the inner ring, and when a driving force is applied to a manually driven input shaft, the outer ring and the inner ring are unlocked from each other by an unlocking piece which rotates together with the manually driven input shaft, and thereafter, the driving force is transmitted to the inner ring and the output shaft.. . ... Ntn Corporation

12/07/17 / #20170350479

Electric actuator

An electric actuator has a housing, an electric motor mounted on the housing, a speed reduction mechanism, and a ball screw mechanism that converts the rotational motion of the electric motor to axial linear motion of a drive shaft. An annular groove is formed on an open end of the blind bore of the housing. ... Ntn Corporation

12/07/17 / #20170350447

Linear motion guide device

A linear motion guide device has a high rigidity, a good linear motion guiding accuracy, and as little rattling as possible. The linear motion guide device prevents sand, water or other contaminants from entering its actuator main body, and features low maintenance requirement. ... Ntn Corporation

12/07/17 / #20170348881

Cage for rolling bearing, and rolling bearing

Provided are that a cage for a rolling bearing in which seizure or break is not generated under a condition of a high temperature and a high speed in which a dm·n value is not less than 80×104, and a rolling bearing using the cage. The rolling bearing 1 is provided with an inner ring 2, an outer ring 3, a plurality of rolling elements 4 interposed between the inner ring and the outer ring and a cage 5 which retains the rolling elements 4. ... Ntn Corporation

11/30/17 / #a green compact according to the present invention is a green compact, which is obtained by compaction-molding raw material powder containing metal powder as a main raw material, the green compact including an oxide film formed between particles of the raw material powder forming the green compact, the oxide film binding the particles of the raw material powder to each other, in which the metal powder to toe used includes metal powder showing a circularity r at a cumulative frequency of 80% of 0.75 or more, the circularity r being expressed by equation (1), where s represents a two-dimensional projected area of the metal powder and l represents a two-dimensional projected circumferential length of the metal powder.

Ntn Corporation

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11/30/17 / #20170343042

Manufacturing method for fluid dynamic bearing devices

The present invention relates to a manufacturing method for a fluid dynamic bearing device, the method involving: forming an axial clearance 14 having a clearance width δ equal to a total amount of clearance widths of two thrust bearing clearances δ1, δ2 between a second bearing surface c of a bearing member 22 fixed to an outer periphery of a shaft member 21 and a sealing member 9; relatively moving the shaft member 21, the shaft member 22, and the sealing member 9 with respect to a housing 7 while the clearance width δ of the axial clearance 14 is maintained after forming the axial clearance 14; and fixing the sealing member 9 to the housing 7 at a time when a first thrust bearing surface b of the bearing member 22 comes into contact with a bottom surface 7b of the housing 7.. . ... Ntn Corporation

11/23/17 / #20170335934

Bridge-type ball screw and manufacturing method thereof

A method of manufacturing a bridge-type ball screw (1) with a bridge member (5) fit into a nut bridge window (6). The bridge member (5) has a linking groove (5a) with a rolling track that acts as a circulating path. ... Ntn Corporation

11/23/17 / #20170335883

Power transmission shaft

A corrugated portion is formed in one end edge portion of the metallic shaft main body (2), and a triangular corrugated portion (11) is formed in an end edge portion of the shaft auxiliary body (3) on the metallic shaft main body side. The metallic shaft main body (2) and the shaft auxiliary body (3) are integrated by being linearly arranged by way of meshing that brings a side of the triangular corrugated portion (9) on the main body side and a side of the triangular corrugated portion (11) on the auxiliary body side into contact with each other. ... Ntn Corporation

11/16/17 / #20170328406

Sintered bearing

Provided is a sintered bearing, including al, cu, and ni, the sintered bearing having al—cu—ni alloy structures (3) sintered together. The al—cu—ni alloy structures (3) each have an al—cu—ni matrix phase (α-phase) and an al—ni compound phase (κ-phase), and are free of an al—cu compound phase (γ-phase).. ... Ntn Corporation

11/16/17 / #20170328086

Electric lock

An electric lock includes an input switching clutch for selectively transmitting the electric or manual driving force to the output line. The input switching clutch includes an outer ring that rotates together with an electrically driven input gear, and an inner ring which rotates together with an output gear. ... Ntn Corporation

11/09/17 / #20170321758

Stationary constant velocity universal joint

A protrusion shaft portion is provided on an end surface of a shaft on a joint fitting side, and a recess into which the protrusion shaft portion is fitted is formed in an inner surface of a bottom wall of the mouth section of the outer joint member. The recess allows angular displacement of the shaft to a predetermined operating angle, and the protrusion shaft portion is brought into contact with a wall surface of the recess at the predetermined operating angle so that angular displacement exceeding the predetermined operating angle is regulated. ... Ntn Corporation

11/09/17 / #20170321751

Thrust roller bearing cage and method for manufacturing the same

A thrust roller bearing cage (11) of the present invention is included in a thrust roller bearing (20) and includes a plurality of pockets (21) accommodating rollers (13). The thrust roller bearing cage (11) includes: a first cylindrical portion (36) extending in a direction of a rotation axis (12); a first disc portion (31) continuous with the first cylindrical portion (36) and extending in a radially outward direction; and a second cylindrical portion (37) continuous with the first disc portion (31) and extending in the direction of the rotation axis (12). ... Ntn Corporation

10/26/17 / #20170307018

Thrust roller bearing cage and method for manufacturing the same

A thrust roller bearing cage (11) of the present invention is included in a thrust roller bearing (20) and includes a plurality of pockets (21) accommodating rollers (13). The thrust roller bearing cage (11) includes: a radially outer area bent portion (41) formed by bending an area located radially outside the pockets (21) inward in a radial direction; and projecting portions (44) that are formed in a tip end of the radially outer area bent portion (41) and project inward in the radial direction so as to contact end faces (16) of the rollers (13) accommodated in the pockets. ... Ntn Corporation

10/26/17 / #20170307017

Thrust roller bearing cage and method for manufacturing the same

A thrust roller bearing cage (11) of the present invention is included in a thrust roller bearing (20) and includes a plurality of pockets (21) accommodating rollers (13). The thrust roller bearing cage (11) includes: a radially outer area bent portion (41) formed by bending an area located radially outside the pockets (21) inward in a radial direction to a tilt angle of less than 45°; and projecting portions (44) that are formed in a tip end of the radially outer area bent portion (41) at positions aligned with the pockets (21) and project inward in the radial direction beyond radially outer edges of the pockets (21) so as to contact end faces (16) of the rollers (13) accommodated in the pockets (21).. ... Ntn Corporation

10/26/17 / #20170307007

Thrust roller bearing cage and method for manufacturing the same

A thrust roller bearing cage (11) of the present invention is included in a thrust roller bearing (20) and includes a plurality of pockets (21) accommodating rollers (13). The thrust roller bearing cage (11) includes: a radially outer area bent portion (41) formed by bending the cage (11) inward in a radial direction along an annular groove formed at a position radially outside the pockets (21); and projecting portions (44) that are formed in a tip end of the radially outer area bent portion (41) at positions aligned with the pockets (21) and project inward in the radial direction beyond radially outer edges of the pockets (21) so as to contact end faces (16) of the rollers (13) accommodated in the pockets (21). ... Ntn Corporation

10/26/17 / #20170307006

Thrust roller bearing cage and method for manufacturing the same

A thrust roller bearing cage (11) of the present invention is included in a thrust roller bearing (20) and includes a plurality of pockets (21) accommodating rollers (13). The thrust roller bearing cage (11) includes: a radially outer area bent portion (41) formed by bending an area located radially outside the pockets (21) inward in a radial direction; and projecting portions (44) that are formed in a tip end of the radially outer area bent portion (41) at positions aligned with the pockets (21) and project inward in the radial direction beyond radially outer edges of the pockets (21) so as to contact end faces (16) of the rollers (13) accommodated in the pockets (21). ... Ntn Corporation

10/26/17 / #20170306929

Roller bearing, retainer segment, spacer and main shaft support structure of wind-power generator

A roller bearing comprises an outer ring, an inner ring, a plurality of rollers arranged between said outer ring and said inner ring; and a plurality of retainer segments having a plurality of column parts extending in a direction along a shaft so as to form a pocket for holding said roller. A connection part extends in a circumferential direction so as to connect the plurality of column parts, and continuously lined with each other in the circumferential direction between said outer ring and said inner ring, in which a corner of a circumferential end face is chamfered. ... Ntn Corporation

10/05/17 / #20170288490

Breather structure of automotive motor drive unit and in-wheel motor drive unit including the same

An automotive motor drive unit includes a breather passage (q) provided in casings (21a, 21r, 22a, 22r) that form an outer shape of the automotive motor drive unit; an entrance port (48m) that is provided at an inlet side of the breather passage and that connects with an internal space (l) defined by the casings; an exit port (67) that is provided at an outlet side of the breather passage and that connects with a space outside the casings; and obstacles (24, 25, 26) standing to form an inner wall of the breather passage and preventing lubrication oil in the internal space from proceeding straight ahead via the entrance port toward the exit port.. . ... Ntn Corporation

10/05/17 / #20170284831

Sensor for detecting a period magnetic field

A sensor including a measuring assembly integrating at least one magnetoresistive element having a stack of two conductive magnetic layers, respectively reference and sensitive, the reference layer having magnetic anisotropy in the direction x and the sensitive layer having a direction y, polarization permanent magnet having a surface extending in a plane of directions x and y and having a symmetry plane of directions x and z, the measuring assembly being disposed with respect to the symmetry plane of the polarization magnet so that the layers of the magnetoresistive element are disposed in a plane parallel to the surface while being offset from said plane in the direction y by a distance (Δy) that is arranged so that the magnetic field of the polarization magnet orients the magnetisation of the sensitive layer in the direction y.. . ... Ntn Corporation

10/05/17 / #20170284570

Joint unit, magnetic rotating arc joining method, and method of manufacturing joint unit

A joint unit includes a first metal pipe, a second metal pipe, and a joint portion (a region including a joint interface at which the end faces of the first and second metal pipes are joined to each other. At the joint portion, an outer circumferential bead portion protruding toward the outer circumference side and an inner circumferential bead portion protruding toward the inner circumference side are formed. ... Ntn Corporation

09/28/17 / #20170276175

Method for producing semispherical shoe for swash plate compressor and injection molding die

The present invention provides a method for producing a durable semispherical shoe which can be prevented from being subjected to seizure even in a dry lubrication state in which there is no lubricating oil at a start time of an operation of a swash plate compressor, can be restrained from deteriorating in its lubricating property due to generated frictional heat, and can be restrained from deteriorating in its strength at a production time and an injection molding die. A semispherical shoe (4), for a swash plate compressor, to be produced by the production method has a base material (5), consisting of a hard material, which has a hollow part along a central axis thereof and a resin layer, consisting of a resin composition, which is formed on a surface of a planar part, disposed on a periphery of the base member, which is to be subjected to sliding contact with the swash plate and on a surface of a spherical part, disposed on the periphery thereof, which is to be subjected to sliding contact with a piston. ... Ntn Corporation

09/28/17 / #20170276172

Wheel bearing apparatus and its mounting structure

A wheel bearing apparatus has an outer member with a body mounting flange and double row outer raceway surfaces, an inner member with double row inner raceway surfaces opposing the double row outer raceway surfaces, and double row rolling elements contained between the inner raceway surfaces and the outer raceway surfaces, respectively, of the inner member and the outer member. A plurality of bolt insertion holes formed in the outer member body mounting flange. ... Ntn Corporation

09/21/17 / #20170268640

Operation device for link actuating device

An operation device for a link actuating device (51) is provided with a target value input unit (57) having a height direction target value input portion (57z) that allows input of a movement amount in a height direction or a coordinate position in the height direction, which causes the distal end posture of the link actuating device (51) to be changed only in the height direction along a central axis of a proximal end side link hub (12). Input converter (58) is provided to calculate, by using an inputted value, a target distal end posture of the link actuating device (51). ... Ntn Corporation

09/21/17 / #20170266725

Dynamic pressure bearing and method for manufacturing same

Dynamic pressure bearing (10), including: a green compact (10′), as a base material, of raw material powder including metal powder capable of forming an oxide coating; and dynamic pressure generating portions (a1 and a2) formed through die molding on an inner peripheral surface (8a) forming a radial bearing gap with an outer peripheral surface (2a1) of a shaft to be supported, that is, a shaft member (2). An oxide coating (11) is formed between particles of the metal powder by subjecting the green compact (10′) to steam treatment, and the dynamic pressure bearing (10) has a radial crushing strength of 150 mpa or more.. ... Ntn Corporation

09/14/17 / #20170261079

Power transmission roller assembly

A power transmission roller assembly is provided which includes a roller body to be brought into abutment with the driving roller and the driven roller; a pivot shaft fixed to a vehicle body; a pivot arm provided radially inside of the roller body, and pivotally mounted on the pivot shaft; a roller support bearing rotatably supporting the roller body; and a pair of biasing members provided on the pivot arm. The pair of biasing members bias the roller support bearing to a predetermined position between the driving and driven rollers where the abutment forces between the roller body and the driving and driven rollers balance with each other.. ... Ntn Corporation

09/14/17 / #20170260968

Abnormality diagnosing apparatus for rolling bearing, wind turbine, and abnormality diagnosing method for rolling bearing

A displacement sensor detects a displacement of a main shaft, thereby detecting a relative displacement between an inner race and an outer race of a bearing. A data processor carries out an abnormality diagnosis for the bearing based on a detected value of the displacement sensor. ... Ntn Corporation

09/07/17 / #20170254374

Ribbon spring of a sprag type one-way clutch and sprag type one-way clutch

A ribbon spring of a sprag type one-way clutch is an elongated strip of sheet metal, and includes a plurality of pockets formed by punching so as to be spaced apart from each other in the longitudinal direction of the strip, to define bridges between respective adjacent pairs of the pockets. A tongue protrudes from one circumferential side of each bridge. ... Ntn Corporation

09/07/17 / #20170254359

Double row angular ball bearing for ct scanning device

A double-row angular contact ball bearing for a ct scanning device includes an inner member including a pair of raceway rings. The raceway rings have positioning holes into which a positioning member is inserted, to thereby suppress radial decentering of the raceway rings. ... Ntn Corporation

09/07/17 / #20170254357

Fluid dynamic bearing device, and bearing member and shaft member for use in same

A ratio w1/w2 of a circumferential width w1 of each of inclined hill portions g2 of a radial dynamic pressure generating portion g and a circumferential width w2 of each of inclined groove portions g3 is 1.2 or larger. And when an inner diameter of a bearing member is d, the circumferential width w2 of each of the inclined groove portions satisfies 0.2d≦w2≦0.4d.. ... Ntn Corporation

09/07/17 / #20170252795

Gear and an electric actuator provided therewith

A gear that can be utilized in an electric actuator has teeth formed on its outer circumference and a central hole formed at its center. An intermediate region is positioned between a peripheral portion near the teeth and a boss near the central hole. ... Ntn Corporation

08/17/17 / #20170237185

Terminal mounting structure for vehicle motor drive device

A terminal mounting structure includes a plurality of receive-side terminals, each of which extends from a distal end of each of electrical leads, a mounting stand that includes an electrically-insulating base and a plurality of supply-side conductive bars that are disposed at intervals and extend so as to pass through the base, a plurality of screws, each of which passes through the receive-side terminal in a direction crossing an extending direction of the receive-side terminal, each of which is screwed into a screw hole formed at an end part of the supply-side conductive bar so as to cause each of the receive-side terminals to contact each of the supply-side conductive bars and to fix each of the receive-side terminals to each of the supply-side conductive bars, and a contact prevention mechanism that is provided in the mounting stand so as to prevent adjacent receive-side terminals from contacting with each other.. . ... Ntn Corporation

08/17/17 / #20170234836

Device for inspecting junction-type outer joint member of constant velocity universal joint

An inspection device inspects a joint-type outer joint member of a constant velocity universal joint that includes a cup section having a bottomed cylindrical shape and track grooves in an inner periphery thereof for torque transmitting elements, and a shaft section extending from a bottom of the cup section. The inspection device inspects the outer joint member, which is obtained through melt-welding on a cup member forming the cup section and a shaft member forming the shaft section. ... Ntn Corporation

08/17/17 / #20170234368

Cooling structure for bearing device

A bearing device includes a rolling bearing having an outer ring and an inner ring, an outer ring spacer disposed adjacent to the outer ring, and an inner spacer disposed adjacent the inner ring. The outer ring and the outer ring spacer are fitted to a housing, and the inner ring and the inner ring spacer are fitted to a rotary shaft. ... Ntn Corporation

08/17/17 / #20170234367

Rolling bearing

A rolling bearing (1) including: an inner ring (2) and an outer ring (3) which are bearing rings; a plurality of rolling elements (4) interposed in a rollable manner between raceway surfaces (2a, 3a) of the bearing rings; and a retainer configured to retain the plurality of rolling elements (4), wherein a nozzle (10) configured to inject a cooling fluid (r) toward the rolling elements (4) is provided to a fixed-side bearing ring which is one of the inner ring (2) and the outer ring (3), with an outlet (10a) side of the nozzle (10) oriented forward in a revolution direction of the rolling elements (4).. . ... Ntn Corporation

08/17/17 / #20170234304

Condition monitoring system and wind power generation system comprising the same

A condition monitoring system for a wind turbine comprises: a sensor which senses a condition of a yaw bearing; a monitor device which generates a diagnosis parameter based on a detection result of the sensor; a sensor which senses a rotating angular velocity of a nacelle and that of a main shaft; and a data server which diagnoses a failure of the yaw bearing based on the diagnosis parameter. The data server diagnoses whether the yaw bearing has a failure, based on a variation of the diagnosis parameter from an initial value thereof when the nacelle has a rotating angular velocity within a non-zero, first prescribed range and the main shaft has a rotating angular velocity within a second prescribed range.. ... Ntn Corporation

08/03/17 / #20170219012

Rolling bearing

It is an object of the present invention to more reliably prevent foreign matter from floating in the bearing space of a rolling bearing, while maintaining lubrication performance in the rolling bearing. In order to achieve this object, a rolling bearing is provided which includes an outer race, an inner race, rolling elements mounted between the outer race and the inner race, a seal ring formed with an oil passage hole, and covering at least one of the axial end openings of the bearing space of the bearing, a filter mounted to the seal ring so as to cover the oil passage hole of the seal ring, and configured to catch foreign matter contained in lubricant oil, and a magnetic member mounted axially inwardly of, and adjacent to, the filter, and configured to attract foreign matter to the magnetic member due to the magnetic force of the magnetic member.. ... Ntn Corporation

08/03/17 / #20170217409

Electric brake device

Improved maneuverability, improved followability towards a target braking force and enhanced brake feeling when a low braking force is being effected may be achieved. A brake controller unit may include a clearance estimator which may be configured to use a rotational angle θ of a motor to estimate a clearance, inclusive of negative values, between a frictional material and a brake. ... Ntn Corporation

07/27/17 / #20170211699

Spool valve

A spool valve is provided which improves the responsiveness of the object to be hydraulically controlled, such as a v-belt type continuously variable transmission, and which improves the overall safety. The spool valve includes a spool inserted in a spool insertion hole formed in a valve body, the spool is moved by an electric motor via a ball-screw to a first position where the input port communicates with the output port, while the output port is not in communication with the drain port, and to a second position where the input port is not in communication with the output port, while the output port communicates with the drain port.. ... Ntn Corporation

07/27/17 / #20170211663

Chain tensioner, chain tensioner group, and method of manufacturing a chain tensioner

A chain tensioner includes an oil supply passage for supplying hydraulic oil into a pressure chamber defined by a cylinder and a plunger, and a check valve provided at the end of the oil supply passage. A leak gap is defined between the sliding surfaces of the cylinder and the plunger. ... Ntn Corporation

07/27/17 / #20170211623

Slide member and method for manufacturing same

A sliding member (1) is formed of a sintered compact. The sintered compact includes: a base layer (3), which mainly contains an fe-based structure and further contains 1.0 wt % to 5.0 wt % of cu, a metal having a melting point lower than a melting point of cu, and c; and a sliding layer (2), which is sintered together with the base layer (3) in a state of being held in contact with the base layer (3) and has a sliding surface (a). ... Ntn Corporation

07/27/17 / #20170211560

Semispherical shoe for swash plate compressor and swash plate compressor

It is an object of the present invention to provide a semispherical shoe which can be prevented from being subjected to seizure even in a dry lubrication state in which there is no lubricating oil at the start time of an operation of a swash plate compressor, is excellent in its sliding contact property and load resistance, does not deteriorate in its lubricating property due to generated frictional heat, does not subject a resin layer to peeling from a base material, and ensures sufficient durability. It is another object of the present invention to provide a swash plate compressor in which a lubricating film is not formed on a sliding contact surface of the swash plate and that of a piston owing to the use of the semispherical shoe. ... Ntn Corporation

07/27/17 / #20170210165

Wheel bearing apparatus

A wheel bearing apparatus has an outer member with a body mounting flange to be mounted on a knuckle that forms part of a suspension apparatus. An inner member includes a wheel hub and at least one inner ring. ... Ntn Corporation

07/20/17 / #20170204898

Support bearing for constant velocity joint, and outer ring for constant velocity joint

The present invention relates to a support bearing for a constant velocity joint in which: a ball rotation surface of a bearing is formed on a shaft section of an outer ring of an inboard-side constant velocity joint; a support bearing outer ring is disposed to face the ball rotation surface; and balls as a plurality of rolling elements which are held by a retainer are disposed between the ball rotation surface and the rotation surface of the support bearing outer ring. With this arrangement, the present invention makes it possible to decrease size and weight.. ... Ntn Corporation

07/20/17 / #20170203354

Method of manufacturing rolling bearing ring and rolling bearing ring

A method of manufacturing a rolling bearing ring includes preparing a coil material and a press machine for obtaining a rolling bearing ring from the coil material, setting the coil material on the press machine, and obtaining the rolling bearing ring by heating the coil material on the press machine to a temperature not lower than an a1 transformation point, thereafter punching a part of the coil material into a ring form, and thereafter quenching a formed object on the press machine.. . ... Ntn Corporation

07/13/17 / #20170197503

In-wheel motor drive device

An in-wheel motor drive device includes a motor part, a speed reducer part, a wheel bearing part, a casing, and a lubrication mechanism that supplies lubricating oil to the motor and speed reducer parts. A rotation shaft of a motor in the motor part drives an input shaft of a speed reducer. ... Ntn Corporation

07/06/17 / #20170191528

Ball bearing cage

A ball bearing retainer holds balls disposed between an inner ring and an outer ring, in pockets formed at a plurality of portions, in a circumferential direction, of an annular body. The annular body includes: annular parts disposed on both sides in an axial direction; and pillar parts that are disposed at a plurality of portions in the circumferential direction and that connect between the annular parts. ... Ntn Corporation

07/06/17 / #20170191524

Ball bearing for spindle with built-in motor

An object is to provide a motor-incorporation-spindle ball bearing capable of allowing cooling air which enters inside the bearing of the motor-incorporation-spindle to be discharged smoothly out of the bearing without causing turbulent flow inside the bearing, does not cause a retainer easily to be vibrated, and provides a high level of silent operation. A seal plate has a length to allow air to pass through the bearing from an entrance side toward an exit side substantially straightly without resistance. ... Ntn Corporation

06/29/17 / #20170187215

Charging device

A charging device includes a rectifier circuit that rectifies an alternating current of an ac power supply, and outputs the rectified alternating current as a pulsating current; power factor correction unit that enhances a power factor of the pulsating current outputted from the rectifier circuit; and an output circuit. The output circuit has an output terminal connecting to a charging terminal of a charging target device, and outputs a power-factor-corrected pulsating current outputted from the power factor correction unit, without performing voltage smoothing. ... Ntn Corporation

06/29/17 / #20170184677

Battery checker

A battery checker is provided with: voltage application unit configured to apply an ac voltage to a battery to be measured; ripple voltage measurement unit configured to measure a ripple voltage contained in a terminal voltage of the battery; and electric power storage level detection unit configured to detect an electric power storage level of the battery by comparing the measured ripple voltage with a set reference. The voltage application unit includes a transformer that transforms voltage for an alternating current of an ac power supply such as a commercial ac power supply, and an output circuit that applies, to the battery, an alternating current with transformed voltage.. ... Ntn Corporation

06/29/17 / #20170184150

Foil bearing

A foil bearing includes an outer member (11), and a plurality of foils (13) that are mounted to an inner circumferential surface (11a) of the outer member (11) and directly face the inner circumferential surface (11a) of the outer member (11) in a radial direction without interposition of another member (such as back foils). The foils (13) each include: holding portions (13a, 13b) that are formed at both circumferential ends and held while in contact with the outer member (11); and a body portion (13c) that is formed circumferentially between the holding portions (13a, 13b) and has a bearing surface (a). ... Ntn Corporation

06/29/17 / #20170182984

Electric brake system

Provided is an electric brake system capable of compensating for a braking force by the whole electric brake system when functional degradation occurs in a part of the system. This system includes: a diagnosis module (24) that detects functional degradation in each of electric brake devices (db); a control calculation module (23) that estimates a controlled variable error that is a difference between an estimate of a braking force determined by a braking force estimation device (28) of an electric brake device (db) in which functional degradation is detected, and a braking force determined by the device (28) of an electric brake device (db) in which no functional degradation is detected; and a controlled variable compensating module (29) that, when the module (23) estimates the existence of the error, distributes a braking force corresponding to the error among the devices (db) other than the electric brake device in which the error exists so as to add the distributed braking force to the braking force target value of each electric brake device.. ... Ntn Corporation

06/22/17 / #20170176287

Bearing abnormality sensing system for railway vehicle

Provided is a railway vehicle bearing abnormality sensing system that can accurately perform abnormality determination for railway vehicle bearings. The system (100) senses an abnormality in a plurality of rolling bearings (17) housed in an axle box (3) provided to a bogie (2). ... Ntn Corporation

06/22/17 / #20170175825

Reverse input blocking clutch

In a locking type reverse input blocking clutch, smooth finished surfaces having no directionality are formed, by barrel polishing, on surfaces brought into contact with rollers while rotation is being transmitted from the input side to the output side, i.e. An inner peripheral cylindrical surface of an outer ring and a surface of a lid portion opposed to the rollers. ... Ntn Corporation

06/22/17 / #20170175820

Constant velocity universal joint

A constant velocity universal joint includes an outer joint member having an opening portion at one end thereof, and an inner joint member configured to transmit torque while allowing angular displacement with respect to the outer joint member through balls. End portions of a boot closing the opening portion of the outer joint member are fastened and fixed to a mounting part of the outer joint member and a mounting part of a shaft extending from the inner joint member. ... Ntn Corporation

06/22/17 / #20170175814

Lubricated rolling bearing for blade roots

The invention relates to a lubricated rolling bearing for blade roots including a coating made of a chemical compound of lamellar structure.. . ... Ntn Corporation

06/22/17 / #20170175813

Cylindrical roller bearing

A cylindrical roller bearing includes a flanged outer race having two inwardly extending flanges. One of the flanges is a flange ring separate from the outer race and fixed to the outer race. ... Ntn Corporation

06/15/17 / #20170169924

Composite magnetic core and magnetic element

The present invention provides a composite magnetic core, containing magnetic powders poor in its moldability, which can be configured arbitrarily and has a magnetic characteristic excellent in direct current superimposition characteristics and a magnetic element composed of the composite magnetic core and a coil wound around the circumference thereof. A compressed magnetic body (2) obtained by compression-molding magnetic powders is combined with an injection-molded magnetic body (3) obtained by mixing a binding resin with magnetic powders having surfaces thereof electrically insulated and by injection-molding a mixture of the magnetic powders and the binding resin. ... Ntn Corporation

06/15/17 / #20170166829

Grease composition and rolling bearing

A grease composition containing base oil, a thickener, and an additive, wherein said additive contains at least one kind selected from among a phosphite ester shown by a chemical formula (1) or a phosphite ester shown by a chemical formula (2); a content of said phosphite ester is 0.5 to 4 parts by weight for 100 parts by weight which is a total of an amount of said base oil and that of said thickener; and said additive contains neither phosphite esters other than said phosphite ester shown by said formula (1) or by said formula (2) nor phosphate esters having organic groups whose carbon number is not less than three:. . ... Ntn Corporation

06/15/17 / #20170166203

Electronic stability control system for vehicle

A vehicle electronic stability control system allows a vehicle to have improved movement performance and limit performance without causing a driver to feel uncomfortable, by actuating electronic stability control from a state where a lateral slip is relatively less likely to occur. The system prevents skidding of a vehicle including motors which individually drive a pair of left and right drive wheels. ... Ntn Corporation

06/15/17 / #20170166178

Brake device system

This brake device system includes a plurality of brake devices mounted to a vehicle, each brake device including a brake rotor, a friction pad, friction pad driving assembly, and a control device. The control device is provided with: braking/stoppage determination section configured to cause the friction pad to come into contact with the brake rotor of each brake device, and determine whether or not the vehicle is braking or being kept stopped; and heat conduction suppressing section configured to, when the braking/stoppage determination section has determined that the vehicle is braking or being kept stopped, reduce the braking force of a part of the plurality of brake devices, thereby to reduce heat conductivity of brake friction heat to the friction pad driving assembly.. ... Ntn Corporation

06/08/17 / #20170163167

Power transmission device

This power transmission device is connected between an ac wiring system connected to an ac power supply, and a dc power supply, and transmits power from the dc power supply to the ac wiring system. The power transmission device includes an ac power supply voltage signal generator, a power converter, a dc voltage conversion unit, a switching element, and a switch open/close signal generator. ... Ntn Corporation

06/08/17 / #20170159776

Chain tensioner

A chain tensioner is provided which is configured such that the air remaining in a pressure chamber can be discharged to the outside through a helical gap defined between a screw and a threaded hole, and through between circumferentially separate radial ends of a spring washer mounted between the screw and a housing. The chain tensioner includes an air discharge groove or grooves formed in the seat surface of the head of the screw such that an annular space defined between the neck of the screw and the inner diameter surface of the spring washer communicates with the outside through the air discharge groove or grooves. ... Ntn Corporation

06/08/17 / #20170159719

Constant velocity universal joint outer joint member and manufacturing method for same

In an outer joint member of a constant velocity universal joint, a cup member and a shaft member are made of medium to high carbon steel and welded together. The cup member has a bottomed cylindrical shape that is opened at one end, and includes a cylindrical portion, a bottom portion, and a short shaft section of a solid shaft shape protruding from the bottom portion and having a joining end surface. ... Ntn Corporation

06/08/17 / #20170159718

Method of manufacturing outer joint member of constant velocity universal joint, outer joint member, shaft member and cup member

Provided is a method of manufacturing an outer joint member of a constant velocity universal joint, which is constructed by forming a cup section having track grooves, and a shaft section, and by welding a cup member and a shaft member, the method including: forming the cup member and the shaft member of medium carbon steel; preparing a cup member having a cylindrical portion and a bottom portion integrally formed by forging, and a joining end surface in a machining step; preparing a shaft member having a joining end surface formed in a machining step; bringing the joining end surface of the cup member and the joining end surface of the shaft member into abutment against each other; welding the cup member and the shaft member by radiating a beam; and performing, after the welding, an ultrasonic flaw detection-inspection step.. . ... Ntn Corporation

06/08/17 / #20170159713

Lubricating oil supply unit and bearing apparatus

The present invention relates to a lubricating oil supply unit including a holding portion (a lubricating oil tank) holding a lubricating oil supplied to the inside of a bearing, a supply portion (a drive circuit and a pump) supplying the lubricating oil to the inside of the bearing from the holding portion, and a control unit (a control circuit) for controlling operations of the supply portion, the control unit being configured to obtain data on a condition of supply of the lubricating oil and to output the data to the outside of the control unit (an output substrate).. . ... Ntn Corporation

06/01/17 / #20170152926

Gear and an electric actuator provided therewith

A sintered gear and an electrical actuator with the sintered gear where the sintered gear has spur teeth formed on a circumference of the gear. A central hole is on the center of the gear. ... Ntn Corporation

06/01/17 / #20170152895

Tripod type constant velocity universal joint

In a tripod type constant velocity universal joint 1, when d1 represents a large inner diameter being a diameter of a circle connecting radially outer end portions of roller guide surfaces 7 and d2 represents a small inner diameter being a diameter of a circle connecting radially inner end portions of the roller guide surfaces 7, a ratio d2/d1 between the small inner diameter d2 and the large inner diameter d1 is set within a range of from 0.73 to 0.80. Further, when d represents a large diameter of a spline formed in a trunnion hub 8 of a tripod member 3 and pcd represents a pitch circle diameter of the roller guide surfaces 7, a ratio d/pcd between the large diameter d and the pitch circle diameter pcd is set to 0.60 or more.. ... Ntn Corporation

06/01/17 / #20170152891

Rolling bearing

A rolling bearing that can easily achieve the higher lubricating characteristic including the smaller rotational torque while employing the existing bearing shape and lubricant is provided. A rolling bearing 1 includes: an inner ring 2 and an outer ring 3 as a race ring; a plurality of rolling elements 4 held between the inner and outer rings; a retainer 5 that retains the rolling elements 4; a sealing member 11 provided at openings on opposite ends in an axial direction of the inner ring 2 and the outer ring 3; and grease 12 to be enclosed in an in-bearing space. ... Ntn Corporation

06/01/17 / #20170152858

Rolling bearing for blade root and manufacturing method, system, oscillating system, and rotating system comprising such a bearing

The rolling bearing for a blade root includes an outer ring (13) and an inner ring (12). An inner space (43) is defined between the inner surface (33) of the outer ring (13) and the outer surface (25) of the inner ring (12). ... Ntn Corporation

06/01/17 / #20170152457

Lubricant composition and lubricant composition-sealed bearing

The present invention provides a lubricant composition which can be used as a lubricant for a rolling component, the composition capable of maintaining enhanced lubrication performance over a long period of time even under high temperature conditions such as temperatures of 180° c. Or higher, and a rolling bearing including the lubricant composition sealed therein. ... Ntn Corporation

06/01/17 / #20170151981

Vehicle

A vehicle includes steering devices configured to change a travel state of the vehicle between a normal travel mode and a special travel mode by steering right and left wheels in right and left opposite directions; a display device; and a processor configured to calculate an angle difference between the angle of each of the right and left wheels in either one of the normal travel mode and the special travel mode, and the current angle of each of the right and left wheels, which have been steered by the steering devices. The processor is further configured to display, on the display device, information necessary for a driver to steer the right and left wheels based on the angle difference.. ... Ntn Corporation

05/18/17 / #20170138415

Rotation transmission device

A rotation transmission device includes an electromagnetic clutch including an armature, a rotor having an outer tubular portion and an inner tubular portion, and an electromagnet. A bearing support tube is provided at the outer end surface of a core supporting an electromagnetic coil of the electromagnet. ... Ntn Corporation

05/18/17 / #20170138406

Constant velocity universal joint outer joint member and manufacturing method for same

A cup member has a cylindrical portion, a bottom portion, and a short shaft portion having a solid shaft shape and including a joining end surface at an end portion thereof. A shaft member has a solid shaft shape and includes a joining end surface at one end thereof. ... Ntn Corporation

05/18/17 / #20170137059

Vehicle

The present invention provides a vehicle including wheels, and a steering module configured to steer the wheels in one of two mutually opposite right and left directions, or in one and the other of the two mutually opposite right and left directions, respectively. In the vehicle, a caster angle is set within the range of ±3 degrees relative to a kingpin angle. ... Ntn Corporation

05/11/17 / #20170133916

Generator

A power generator includes: an output iron core having an output winding wound therearound; and a field iron core having a main field winding and an auxiliary field winding wound therearound, and is a self-excitation type in which one of the output iron core and the field iron core serves as a stator and the other serves as a rotor, the main field windin is connected to a first rectifying element, the auxiliary field winding is connected to a second rectifying element, and power is generated by relative rotation of the stator and the rotor. The power generator is provided with an initial excitation unit configured to apply, to one or both of the output iron core and the field iron core, a magnetic force to a degree required for initial excitation in power generation.. ... Ntn Corporation

05/11/17 / #20170130780

Method for manufacturing outer joint member for constant-velocity universal joint and outer joint member

A method of manufacturing an outer joint member of a constant velocity universal joint includes forming cup and shaft members of medium carbon steel, preparing, as the cup member, a cup member having cylindrical and bottom portions integrally formed by forging, and a joining end surface formed on an outer surface of the bottom portion, and preparing, as the shaft member, a shaft member having a joining end surface to be joined to the bottom portion of the cup member. The method also includes bringing the joining end surfaces of the cup and shaft members into abutment against each other, and welding the cup and shaft members from an outer side of the cup member to an abutment portion between the cup and shaft members in a radial direction of the cup members.. ... Ntn Corporation

05/11/17 / #20170130779

Method for manufacturing outer joint member for constant-velocity universal joint and outer joint member

A method of manufacturing an outer joint member of a constant velocity universal joint includes forming cup and shaft members using medium carbon steel, preparing, as the cup member, a cup member having cylindrical and bottom portions integrally formed, and a joining end surface formed on an outer surface of the bottom portion, preparing, as the shaft member, a shaft member having a joining end surface to be joined to the bottom portion of the cup member, and bringing the joining end surfaces of the cup and shaft members into abutment against each other. The method also includes welding the cup and shaft members from an outer side of the cup member to an abutment portion between the cup and shaft members in a radial direction of the cup member under a state in which a hollow cavity portion is formed inside the abutment portion.. ... Ntn Corporation

05/11/17 / #20170130700

Condition monitoring system and wind power generation system using the same

A condition monitoring system for a wind turbine includes: each sensor to sense a condition of equipment; a monitor device configured to generate a diagnosis parameter based on a detection result of each sensor; a data server configured to diagnose a failure of the equipment based on the diagnosis parameter; and a rotation angle sensor for sensing the nacelle's rotation speed. The data server is configured to correct the diagnosis parameter based on a sensed result of the rotation angle sensor, and diagnose whether the equipment has a failure by comparing the corrected diagnosis parameter with a predetermined threshold value.. ... Ntn Corporation

05/04/17 / #20170122378

Method for manufacturing outer joint member for constant velocity universal joint, shaft member and outer joint member

A method of manufacturing an outer joint member of a constant velocity universal includes forming cup and shaft members of medium carbon steel, preparing, as the cup member, a cup member having cylindrical and bottom portions integrally formed by forging, and a joining end surface formed on an outer surface of the bottom portion after the forging, preparing, as the shaft member, a shaft member having a joining end surface to be joined to the bottom portion of the cup member, and bringing the joining end surfaces of the cup and shaft members into abutment against each other. The method also includes welding the cup and shaft members from an outer side of the cup member to an abutment portion between the cup and shaft members in a radial direction of the cup member.. ... Ntn Corporation

05/04/17 / #20170122377

Tripod-type constant velocity joint

A tripod-type constant velocity joint is provided which includes an intermediate member, and first and second tripod members connected to the respective ends of the intermediate member. The intermediate member includes first and second outer rings. ... Ntn Corporation

05/04/17 / #20170120369

Method for butt welding, butt welded joint, and outside joint member for constant velocity universal joint

For butt-welding, which includes bringing joining end surfaces of a cup member and a shaft member into abutment against each other and radiating a high energy intensity beam from a radially outer side, the shaft member has a recess on a radially inner side of the joining end surface to obtain a welded portion having a closed hollow cavity on a radially inner side after butt-welding. The joining end surface (protruding surface) of the cup member protrudes toward a radially inner side with respect to an inner diameter of the joining end surface of the shaft member. ... Ntn Corporation

05/04/17 / #20170120368

Manufacturing method for constant velocity universal joint outer joint member and outer joint member

A method of manufacturing an outer joint member of a constant velocity universal joint includes forming cup and shaft members of medium carbon steel, the cup member being manufactured by preparing a cup member having cylindrical and bottom portions being integrally formed, and a fitting hole formed in a thick portion of the bottom portion, the shaft member being manufactured by preparing a shaft member having a fitting outer surface formed at an end portion of the shaft member to be joined to the bottom portion of the cup member, and fitting the fitting hole of the cup member to the fitting outer surface of the shaft member. The method also includes welding the cup and shaft members from an inner side of the cup member to a fitted portion between the cup and shaft members.. ... Ntn Corporation

04/27/17 / #20170117610

Chip antenna

Provided is a chip antenna (1), including: an antenna pattern (3); and a base body (2), which has a hexahedral shape, the antenna pattern (3) including: an antenna part (31), which is held on an upper surface of the base body (2); and a plurality of terminal parts (32), which are held on a lower surface of the base body (2), each of the plurality of terminal parts (32) being soldered to a circuit board (10), in which the antenna pattern (13) further includes a band-shaped protruding part (34), which extends in a long-side direction of the antenna part (31), and is embedded in the base body (2), and the band-shaped protruding part (34) is provided at least along a range of each of two long sides of the antenna part (31) excluding a range in which the plurality of terminal parts (32) are arranged.. . ... Ntn Corporation

04/27/17 / #20170113713

Unit for vehicle steering system

A unit for a vehicle steering system including a clutch mounted between the steering wheel and the pinion of the rack and pinion includes either a first shaft coupled to the steering wheel, or a second shaft coupled to the pinion, and the clutch, which is mounted in the rotation transmission path between the first shaft and the second shaft. The clutch includes an input shaft and an output shaft, one of which is fixed to, while being coaxial with, the first shaft or the second shaft.. ... Ntn Corporation

04/20/17 / #20170110783

Chip antenna

Provided is a chip antenna (1), including: an antenna pattern (3) formed through bending a conductive plate into a three-dimensional shape, the antenna pattern including an antenna part (31) and a terminal part (32) electrically connected to a circuit substrate (10); and a base body (2) formed through injection molding a resin with the antenna pattern (3) serving as an insert component, in which the base body (2) includes: a rectangular plate-like top wall (21) holding the antenna part (31) on a surface thereof; and a rectangular plate-like vertical wall (22) provided upright along a long-side direction of the top wall (21) with one end (upper end) thereof in a short-side direction being connected to the top wall (21) and with another end (lower end) thereof in the short-side direction holding the terminal part (32).. . ... Ntn Corporation

04/20/17 / #20170110233

Magnetic element

The present invention provides a magnetic element in which iron loss-caused heat generation is restrained and which can be produced with a high productivity. The magnetic element has a magnetic body which allows a magnetic flux generated by a coil (4) to pass therethrough. ... Ntn Corporation

04/20/17 / #20170108407

Machine component diagnosis system and server thereof

A machine component diagnosis system that has high convenience and performing highly accurate malfunction diagnosis. This system includes: an information terminal, a server connected to the information terminal via a communication line network; a vibration sensor that measures vibration of a diagnosis subject; and an additional sensor that measures one characteristic of the diagnosis subject. ... Ntn Corporation

04/20/17 / #20170108067

Electric brake device

The electric brake device includes an electric motor, a brake rotor, a friction pad, a conversion mechanism, a braking force command section, a braking force estimation section, a controller, and a power supply device. The controller includes: a power determination section to determine whether an amount of remaining power that can be supplied from a power supply device to the electric motor has become equal to or less than a determined value; and a residual pressure cancellation section to cancel a residual pressure of a braking force by driving the electric motor in a direction opposite to a brake pressing direction such that an estimated value of the braking force obtained by the braking force estimation section becomes equal to or less than a set value, when the power determination section determines that the amount of remaining power has become equal to or less than the determined value.. ... Ntn Corporation

04/20/17 / #20170108045

Bearing ring and roller bearing having said bearing ring

Partially diffusion-alloyed steel powder is subjected to compression molding and then sintered to form a sintered metal material (10′), and a raceway surface (2) is formed on the sintered metal material (10′) through plastic working, to thereby manufacture a raceway ring (1). With at least a risk volume of the raceway ring (1) being adopted as a prediction volume, a square root √areamax of the maximum pore envelope area estimated to be present at least in the prediction volume is set to be less than 50 μm. ... Ntn Corporation

04/20/17 / #20170107865

Seal ring

The present invention provides a seal ring, for a variable valve timing system, which is resistant to breakage when the seal ring is expanded at a seal ring mounting time even in a case where the seal ring is thick and allowed to have a complicated configuration by performing injection molding and achieve a small oil leak, a low degree of friction, and improved wear resistance. In the variable valve timing system having a camshaft (5) for driving an intake valve of an internal combustion engine and an exhaust valve thereof, an inner rotational body (3) fixed to the camshaft (5), an outer rotational body (4) making a rotational motion relative to the inner rotational body (3) by supply of hydraulic oil at a time of altering opening and closing timings of the intake valve and the exhaust valve, and a shaft body (2) mounted on rotational body (3).. ... Ntn Corporation

04/13/17 / #20170101171

Rolling bearing for blade root, oscillating system, and rotating system

A blade root extends in a longitudinal direction between a proximal end and a distal end. The rolling bearing allows oscillation of the root about an axis extending in the longitudinal direction relative to a housing. ... Ntn Corporation

04/06/17 / #20170098499

Magnetic core part, magnetic element, and method for producing magnetic core part

The present invention provides a magnetic core part by which failures such as cracks do not occur even if the magnetic core part contains 90% by mass or more of an amorphous metal powder. The magnetic core part is formed by thermoset molding at least one magnetic powder selected from an amorphous metal powder alone and an amorphous metal powder coated with an insulating material, and a thermosetting binder resin. ... Ntn Corporation

04/06/17 / #20170097045

Wheel bearing apparatus

A wheel bearing apparatus for rotatably supporting a wheel includes an inner member having two rows of raceway grooves on its outer circumference, an outer member having two rows of raceway grooves on its inner circumference, and rolling elements interposed between the raceway grooves of the inner and outer members. The raceway grooves of the inner and outer members are formed by hardened steel cutting. ... Ntn Corporation

04/06/17 / #20170096986

State monitoring system

Provided is a state monitoring system that monitors a state of an apparatus provided in a wind turbine, including a wireless measuring unit including a sensor provided to the apparatus, and a data collection device. The wireless measuring unit includes a memory storing measured data obtained from the sensor, and a wireless communication unit transmitting the measured data obtained from the sensor to the data collection device. ... Ntn Corporation

03/30/17 / #20170091798

Sports-based rewards system, method and apparatus

Disclosed are a system, method and apparatus for implementing a sports-based reward program. In one embodiment, a server provides future sporting event information, pre-game questions, and in-game questions to users over a wide-area network. ... Ntn Corporation

03/23/17 / #20170080926

Drive control device with traction control function for right-left independent drive vehicle

Traction control unit interposed between torque allocation unit and torque control unit for left and right wheels and each configured to inhibit a slip of the drive wheel during acceleration or deceleration are provided. A longitudinal force estimation unit for estimating longitudinal forces acting on the respective left and right wheels and longitudinal force coincidence control unit are provided. ... Ntn Corporation

03/16/17 / #20170074329

Method for manufacturing outer joint member for constant velocity universal joint and outer joint member

Provided is a method of manufacturing an outer joint member of a constant velocity universal joint, which is constructed by welding a cup member and a shaft member, the method including: forming the cup member and the shaft member of medium carbon steel; preparing; preparing; bringing the joining end surface of the cup member and the joining end surface of the shaft member into abutment against each other; welding the cup member and the shaft member; and performing, after the welding, ultrasonic flaw detection-inspection from any one of a surface side of the cup member and a surface side of the shaft member, which has the another one of the joining end surface of the cup member and the joining end surface of the shaft member.. . ... Ntn Corporation

03/16/17 / #20170074326

Grease composition and grease-filled wheel bearing

Provided is a grease composition for a wheel bearing, containing (a) a base oil consisting of a mineral oil and a synthetic hydrocarbon oil, wherein the ratio of the synthetic hydrocarbon oil to the total amount of the mineral oil and the synthetic hydrocarbon oil is 40 to 60 mass %, and the base oil has a kinematic viscosity at 40° c. Of 40 to 65 mm2/s; (b) a thickener of formula (a) wherein r2 is diphenylmethane, and r1 and r3, which may be the same or different from each other, each represent cyclohexyl group or a straight-chain or branched alkyl group having 16 to 20 carbon atoms, with a molar ratio of the cyclohexyl group to the total number of moles of the cyclohexyl group and the alkyl group being 50 to 90 mol %; (c) an amine type antioxidant; and (d) an amine phosphate type antiwear agent.. ... Ntn Corporation

03/16/17 / #20170073002

Method for controlling a steering device, and vehicle

A method of controlling a steering device including a pair of rack bars capable of steering right and left wheels in one and/or the other of opposite right and left directions, and a coupling mechanism which moves the rack bars in the right direction and/or the left direction by the same distance. The method includes issuing a command to couple or uncouple the coupling mechanism, and driving at least one of an engaging part and a receiving part of the coupling mechanism relative to the other if a coupling state sensor are unable to detect that the coupling mechanism has been coupled or uncoupled when a predetermined time has passed after issuing the command.. ... Ntn Corporation

03/16/17 / #20170072931

Electric brake device

A brake controller is provided with a positive efficiency operation limiter configured to provide a time for maintaining or decreasing a torque to be generated by a motor, such that a braking force generated by pressing between a brake rotor and friction pads does not decrease, while a braking force command value outputted from a braking force command section increases. For example, the limiter limits a ratio of a time for increasing the braking force, relative to a sum of the time for increasing the braking force and the time for maintaining or decreasing the braking force, to a predetermined value or less.. ... Ntn Corporation

03/09/17 / #20170067509

Wheel bearing apparatus

A wheel bearing apparatus has an outer member, an inner member, and double row rolling elements contained between the outer raceway surfaces and inner raceway surfaces of the outer member and the inner member. A cup-shaped steel protective cover is mounted on the inner-side end of the outer member. ... Ntn Corporation

03/09/17 / #20170067506

Sintered bearing, fluid dynamic bearing device and motor comprising same, and sintered bearing manufacturing method

Provided is a sintered bearing (8) having a plurality of axial grooves (8c1) equiangularly arranged in an outer peripheral surface (8c) thereof and a plurality of dynamic pressure generating grooves (8a11) equiangularly arranged in an inner peripheral surface (8a) thereof, in which a number of the plurality of axial grooves (8c1) is an integral multiple of a number of the plurality of dynamic pressure generating grooves (8a11) on the same circumference.. . ... Ntn Corporation

03/09/17 / #20170066428

Electric brake device

Provided is an electric brake device that is able to achieve redundancy when an abnormality occurs in a load sensor, without increasing the size of the load sensor. The electric brake device includes a brake rotor, a friction pad, an electric motor, a transmission mechanism, braking force command section, braking force estimation section, motor rotation angle detector, and a controller. ... Ntn Corporation

03/09/17 / #20170065886

User-controlled entertainment system, apparatus and method

A system, method, and apparatus for allowing a wireless communication device operator to control aspects of a multi-player game are described. In one embodiment, a server sends a signal to a plurality of wireless communication devices indicating an availability of an exclusive privilege for one of the wireless communication device operators to exclusively control one or more aspects of the multi-player game. ... Ntn Corporation

02/23/17 / #20170051790

Cooling structure for bearing device

A bearing device has rolling bearings each having an inner ring mounted on a main shaft and an outer ring; an inner ring spacer interposed between the inner rings of the neighboring rolling bearings and mounted on the main shaft; an outer ring spacer interposed between the outer rings of the neighboring rolling bearings; and a cooling structure. The cooling structure includes a nozzle provided in the outer ring spacer to supply a cooling fluid to the rolling bearings by blowing the cooling fluid to an outer peripheral surface of the inner ring spacer. ... Ntn Corporation








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