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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


Abnormality diagnosis device and sensor detachment detection method

An abnormality diagnosis device, which is capable of detecting that a vibration sensor is detached from a measurement object, includes a vibration sensor and a control device. The vibration sensor is attached to a measurement object, and measures vibration of the measurement object. ... Ntn Corporation

Resin pulley

A resin pulley includes a rolling bearing having an outer race. The outer race has, on the radially outer surface, two annular grooves, and an annular protrusion between the annular grooves. ... Ntn Corporation

Automatic clutch device

An automatic clutch device includes an axial force generating mechanism which presses and moves a release bearing toward a diaphragm spring to disengage a clutch disk and the diaphragm spring from each other. The axial force generating mechanism includes an electric motor disposed adjacent to the outer periphery of an end of an input shaft of a transmission, and a rotation-linear motion conversion mechanism for converting the rotation of the rotor of the electric motor to a linear motion of the release bearing. ... Ntn Corporation

Rolling bearing with abnormality detector

The present invention provides an abnormality detector for a rolling bearing including an outer race, and an inner race. The abnormality detector includes a filter configured to prevent metal pieces contained in lubricating oil flowing through the bearing space between the outer and inner races from passing through the filter, while allowing the lubricating oil to pass through the filter so as to flow to the outside space of the bearing space; an electric circuit including a pair of permanent magnets mounted, as a pair of electrodes, to the filter so as to be spaced apart from each other, and lines extending from the respective electrodes to a power source; and an output detector configured to detect a change in electrical output from the electric circuit when metal pieces adhere between the pair of permanent magnets, thereby detecting the state of metal pieces contained in the lubricating oil.. ... Ntn Corporation

Retainer for thrust bearing and thrust bearing

To provide a retainer for a thrust bearing, which is to be assembled and decomposed regularly for being washed, having superior ball retaining performance itself and being attached and detached easily, and a thrust bearing having the retainer. A retainer for a thrust bearing 1, which retains a plurality balls intervened between a pair of raceway rings in a thrust bearing, is formed of a ring shaped plate member 2 formed of an injection molded body of a resin composition containing fluororesin, which is capable of injection molding, as a base resin. ... Ntn Corporation

Angular contact ball bearing, and ball screw device using same

Provided is an angular contact ball bearing that can have a load capacity increased by increasing the diameter of each ball and that is suitably used mainly to bear a thrust load. In the angular contact ball bearing, a plurality of balls are rollably interposed between an inner ring raceway groove formed on an outer peripheral surface of an inner ring and an outer ring raceway groove formed on an inner peripheral surface of an outer ring. ... Ntn Corporation

Condition monitoring system for wind turbine

A condition monitoring system for a wind turbine generator includes an orientation sensor installed in a nacelle and configured to detect an orientation of the nacelle and a condition monitoring unit configured to receive an output from the orientation sensor and perform at least any one of recording, analysis, or transmission of a signal. The condition monitoring unit preferably detects, based on the output from the orientation sensor, the movement along the rotation direction of the nacelle associated with a torsional oscillation of the tower. ... Ntn Corporation

Hydroelectric power generation apparatus and power generation system

A hydroelectric power generation apparatus includes a braking force generation unit configured to apply a braking force to rotation of a hydraulic turbine, and a controller configured to control the braking force generation unit to repeat increasing and decreasing the braking force to vary a rotational speed of the hydraulic turbine. Varying the rotational speed of the hydraulic turbine helps to flow away debris and the like adhering to hydraulic turbine blades. ... Ntn Corporation

Machine component made of ferrous sintered metal

Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° c., to bond iron structures to each other with copper and tin.. ... Ntn Corporation

Headrest

A headrest includes a reverse input blocking clutch and a displacement mechanism. The reverse input blocking clutch includes input and output shafts that respectively receive and output rotational torque, an outer ring and a side plate in which rotation is restricted, cylindrical rollers that control blocking of the rotational torque reversely input from the output shaft and transmission of the rotational torque from the input shaft through engagement and disengagement between the outer ring and output shaft, and a cage to retain the cylindrical rollers. ... Ntn Corporation

Sintered bearing and manufacturing method for same

Provided is a sintered bearing (1), including 3 to 12% by mass of aluminum, 0.05 to 0.5% by mass of phosphorus, and the balance including copper as a main component, and inevitable impurities, the sintered bearing (1) having a structure in which an aluminum-copper alloy is sintered with a sintering aid added to raw material powder, a pore (db, do) in a surface layer portion of the sintered bearing (1) being formed smaller than an internal pore (di).. . ... Ntn Corporation

Vibration analyzer and abnormality diagnosis system

Provided are a vibration analyzer and an abnormality diagnosis system capable of listening to vibration data in response to a user's request. The vibration analyzer includes a display, an audio output unit, an input unit, and a controller. ... Ntn Corporation

Assembly of a crankshaft end portion with a flywheel and a guide bearing, and related engine assembly

To assemble an end portion (12) of a crankshaft (10) defining an axis (100) of revolution, forming at least one first bearing surface (30), turned radially outward, and a shoulder (32), on which threaded holes (34) lead outward, with a flywheel (24) comprising axial bores (36) and a bearing (28) for guiding the crankshaft relative to an engine housing (26) in rotation about the axis of revolution, attachment screws (16) passing through the axial bores of the flywheel and screwed into the threaded holes in the crankshaft end portion are provided, thus rigidly connecting the flywheel to the crankshaft end portion. The guide bearing comprises at least one unitary guide ring (42) positioned on the first bearing surface (30) and having a first, transverse surface (44) axially bearing on the shoulder (32). ... Ntn Corporation

Wheel bearing apparatus

A wheel bearing apparatus has a magnetic encoder 14 mounted on an inner ring 5 opposing the rotational speed sensor 16, via the cap 10 and an air gap. The cap 10 has a cylindrical fitting part 10a press-fit into an inner circumference of an end of the outer member 2. ... Ntn Corporation

07/26/18 / #20180208184

Vehicle attitude control device

The vehicle attitude control device generates target yaw moment on the basis of the deviation between a standard yaw rate and an actual yaw rate and is applied to a vehicle driven with the target yaw moment. The vehicle attitude control device is provided with a detection speed processor that performs a process such that a vehicle speed gently changes, a limit yaw rate calculator that determines a limit yaw rate by dividing lateral acceleration by the processed vehicle speed, and a standard yaw rate corrector that corrects the standard yaw rate using the limit yaw rate when the standard yaw rate is higher than the limit yaw rate. ... Ntn Corporation

07/26/18 / #20180207810

Combination type link actuation device

A combination link actuation device has two link actuation devices combined with each other. Each link actuation device is provided so as to connect a distal end side link hub to a proximal end side link hub such that an orientation of the distal end side link hub is changed relative to the proximal end side link hub through three link mechanisms aligned in a circumferential direction. ... Ntn Corporation

07/26/18 / #20180207800

Diagnostic device for link actuation device

A diagnostic device may be used for a link actuation device. A distal end side link hub may be coupled to a proximal end side link hub via three or more link mechanisms such that posture of the distal end side link hub can be changed. ... Ntn Corporation

07/19/18 / #20180202493

Method for manufacturing wheel bearing apparatus

Provided is a method of manufacturing a bearing device for a wheel including an inner ring that is fixed to a hub wheel by a caulking portion formed by plastically deforming an end portion of the hub wheel in a radially outward direction. The inner ring includes a raceway groove formed by grinding. ... Ntn Corporation

07/19/18 / #20180202489

Double-row self-aligning roller bearing

A double-row self-aligning roller bearing includes an inner ring, an outer ring having a spherical raceway surface, and rollers in a left row and rollers in a right row interposed between the inner ring and the outer ring, the rollers in the left row and the rollers in the right row each having an outer peripheral surface having a cross-sectional shape along the raceway surface of the outer ring. The length of each roller in the left row and the length of each roller in the right row are different from each other, and the number of the rollers in the left row and the number of the rollers in the right row are different from each other.. ... Ntn Corporation

07/19/18 / #20180201240

Electric braking system

Provided is an electric braking system configured to prevent antilock control from being unintentionally ended so that the braking behavior can be stabilized. An antilock control function unit includes an antilock control intervention determination unit configured to determine whether or not to execute antilock control. ... Ntn Corporation

07/19/18 / #20180200849

Clamping band attachment method and clamping band attachment apparatus

In a state where a pair of protrusion portions of a ring portion is clamped by front end engagement portions of a pair of claw members (71) (72), the front end engagement portions of the pair of claw members are swung in a direction approaching each other about a pivotal supporting portion (80). A sliding body (77) slides with the contact of the front end engagement portion to the ring portion or to the protrusion portion thereof so as to follow a radial and circumferential displacement of the protrusion portion accompanying a diameter reduction of the ring portion.. ... Ntn Corporation

07/19/18 / #20180200848

Link actuator to initially set position of origin

A link actuator includes a proximal end side link hub, a distal end side link hub, and link mechanisms which connect the distal end side link hub to the proximal end side link hub. Each of the link mechanisms includes a proximal side end link member, a distal side end link member, and an intermediate link member. ... Ntn Corporation

07/19/18 / #20180200826

Automatic welding machine

An automatic welding machine includes a link actuator in which a distal end side link hub is coupled to a proximal end side link hub via three or more link mechanisms and the position of the distal end side link hub relative to the proximal end side link hub can be arbitrarily changed. The automatic welding machine is provided with one or more linear motion actuators configured to cause the proximal end side link hub of the link actuator to advance/retract relative to a mount along respective axes, and a welding torch is mounted on the distal end side link hub. ... Ntn Corporation

07/12/18 / #20180194334

Powered brake device

Both of a quiet operation with smaller torque variation for prioritizing nvh and a high torque operation or high output operation for prioritizing torque or output may be provided by selectively using, based on requests, a control scheme that reduces torque variation and a control scheme that maximizes a torque. A motor current calculator may be capable of selectively using an output prioritizing control scheme that prioritizes a torque output and a torque variation suppressing control scheme that prioritizes smaller torque variation. ... Ntn Corporation

07/12/18 / #20180194333

Electric brake device

Provided is an electric brake device capable of adjusting a clearance without making a driver feel discomfort, in a vehicle equipped with the electric brake device. A control device (2) of this electric brake device (db) includes: a brake operation amount detector (24) to detect an operation amount to a brake operation member (27) of the vehicle; and an operation record flag storage unit (19) to store an operation record flag indicating a record of a latest operation performed by the driver to the brake operation member (27), on the basis of the operation amount detected by the brake operation amount detector (24). ... Ntn Corporation

07/12/18 / #20180194002

Composite work device using link operating device

The composite work apparatus includes: two link actuation devices that support two working bodies such that postures of the working bodies can be individually changed; and three or more linear motion actuators that move the two link actuation devices and two or more work objects relative to each other. In each link actuation device, a distal end side link hub is connected to a proximal end side link hub via three or more link mechanisms such that a posture of the distal end side link hub can be changed relative to the proximal end side link hub, and a posture control actuator that arbitrarily changes the posture of the distal end side link hub relative to the proximal end side link hub is provided to each of two or more link mechanisms of the three or more link mechanisms.. ... Ntn Corporation

07/12/18 / #20180193942

Method for manufacturing outer joint member for constant velocity universal joint and ultrasonic flaw detection method for welded section

A manufacturing method is used for an outer joint member of a constant velocity universal joint. The outer joint member includes a cup section having track grooves formed in an inner periphery of the cup section, which are engageable with torque transmitting elements, and a shaft section formed at a bottom portion of the cup section. ... Ntn Corporation

07/05/18 / #20180187722

Retainer and deep groove ball bearing

Provided is a retainer (7), including a pair of annular members (8, 8), the pair of annular members (8, 8) being coupled to each other so that semispherical bulging portions (9, 9) which are opposed to each other form pockets (11) configured to retain balls (6). The pockets (11) each include a ball-opposed surface (12) having a ball non-contact portion (14) that is recessed toward a side opposite to the ball side. ... Ntn Corporation

07/05/18 / #20180187280

Mechanical component

There is provided a high-strength steel mechanical component. A mechanical component is a mechanical component composed of a steel having a carbon content of more than or equal to 0.2 mass % and less than or equal to 0.8 mass %, and includes a quench-hardened layer formed in a surface layer of the mechanical component. ... Ntn Corporation

07/05/18 / #20180186240

Vehicular motor drive device and vehicle having the same mounted thereon

A failure occurrence determiner may include a rotor angle measurement module that calculates a measurement value of an angular phase of a motor rotor with respect to a wheel, based on a rotational angle of the motor rotor that is detected by an angle sensor equipped to an electric motor and rotational information of the wheel that is detected by a speed sensor. It may also include a rotor angle estimation module that calculates an estimate value of the angular phase of the motor rotor with respect to the wheel, based on a motor torque command value for a motor controller. ... Ntn Corporation

07/05/18 / #20180186181

Wheel bearing apparatus

A wheel bearing apparatus has a seal (8) with a metal core (15) and a sealing member (6). The metal core (15) is fit into an outer-side end inner circumference of the outer member (10). ... Ntn Corporation

06/28/18 / #20180180397

Pitch cone angle measurement method and pitch cone angle measurement device

A pitch cone angle measurement method includes bringing an abutment portion into abutment against ridges, and bringing another abutment portion into abutment against the ridges at a position separated in a direction orthogonal to a rotation axis direction of the rotation power transmitting element by a radial distance from a position at which the ridges and the abutment portion are brought into abutment against each other. The method also includes measuring a distance in the rotation axis direction between the position at which the abutment portion is brought into abutment against the ridges and a position at which the other abutment portion is brought into abutment against the ridges, and calculating a pitch cone angle of the rotation power transmitting element based on the distance in the rotation axis direction and the predetermined radial distance.. ... Ntn Corporation

06/28/18 / #20180180101

Outer joint member of a constant velocity universal joint

An outer joint member of a constant velocity universal joint includes a cup section having track grooves formed in an inner periphery thereof, which are engageable with torque transmitting elements, and a shaft section formed at a bottom portion of the cup section. The cup section and the shaft section are formed as separate members, and by bringing a cup member forming the cup section and a shaft member forming the shaft section into abutment against each other at respective joining end surfaces and welding them, a hollow cavity portion is formed. ... Ntn Corporation

06/28/18 / #20180178343

Shaft member for fluid dynamic bearing device and manufacturing method for shaft member

Grinding is performed on an outer peripheral surface of a shaft member while rotationally driving the shaft member under a state in which both end surfaces of the shaft member are sandwiched between a pair of support portions. A convex surface is formed on one axial end surface of the shaft member or an end surface of one of the pair of support portions, and a flat surface is formed on the other of the one axial end surface of the shaft member and the end surface of the one of the pair of support portions. ... Ntn Corporation

06/14/18 / #20180162334

Electric brake system

Provided is an electric brake system that changes responsiveness depending on responsiveness required for an electric brake device, thereby enabling operation sound and power consumption to be reduced without influencing movement of a vehicle. The electric brake system includes one or more electric brake device (3) each having a control operation module (12) for performing follow-up control for a target braking force. ... Ntn Corporation

06/07/18 / #20180154873

Electric brake device

A controller of the electric brake device includes a reaction force compensator to perform compensation such that a rotational resistance, of an electric motor, generated by a reaction force to a pressing force of a friction member against a brake rotor is cancelled out. The reaction force compensator includes: a direct estimator to directly estimate the reaction force from information including at least either a drive voltage or current of the electric motor and at least either a rotational angle of the electric motor or a value obtained by differentiating the rotational angle one or more times; an indirect estimator to estimate the reaction force from an estimated braking force on the basis of a set correlation; and a compensation reaction force determiner to determine a reaction force, to perform the compensation, by using estimation results of direct estimation and indirect estimation at predetermined proportions.. ... Ntn Corporation

06/07/18 / #20180154872

Electric brake device

An electric brake device includes an electric brake actuator and a control device. The controller includes: a brake control calculator that control a braking force so as to follow up a target braking force provided from a host ecu; a brake maintaining current estimator that maintains a motor current at a constant value; and a switching controller that performs switching between the brake control calculator and the brake maintaining current estimator. ... Ntn Corporation

05/31/18 / #20180151284

Magnetic element

To provide a magnetic element such as a pot-shaped inductor in which a coil is covered by a magnetic body, having excellent cooling performance and being capable of suppressing heat generation. An inductor 1 as the magnetic element is provided with a coil formed by winding a winding wire, a magnetic body 2 in which the coil 5 is arranged and which transmits magnetic flux generated by the coil 5. ... Ntn Corporation

05/31/18 / #20180149207

Fixed-type constant velocity universal joint

Provided is a fixed type constant velocity universal joint, including: an outer joint member (10) having a cup-shape; and an inner joint member (20), which is received in the outer joint member (10), and is configured to transmit torque between the inner joint member (20) and the outer joint member (10) through intermediation of balls (30) while allowing angular displacement. The fixed type constant velocity universal joint has a shaft (50) extending from the inner joint member (20). ... Ntn Corporation

05/31/18 / #20180149197

Thrust bearing for hydraulic continuously variable transmission

A thrust bearing for a hydro-static transmission according to the present invention is incorporated in a hydro-static transmission and includes: an inner ring which makes contact with pistons of piston chambers of a variable capacity pump; an outer ring fixed to a swash plate; a plurality of balls held between the inner ring and the outer ring via a retainer, where the retainer is made of a synthetic resin provided by polyamide 66, and contains glass fiver at a rate not greater than 10 mass percent. With this arrangement, the present invention prevents breakage of the retainer caused by delayed or speeded balls resulting from an imbalanced load when the pump swash plate varies its slant angle, thereby provides a long-life thrust bearing for a hydro-static transmission.. ... Ntn Corporation

05/24/18 / #20180141423

Two-motor vehicle drive device

Helical gears in gear trains of speed reducers 2l, 2r generate thrust forces in directions not to separate a speed reducer casing 20 which has an axial three-piece structure, whereby leakage of lubricant oil from between separated surfaces in the speed reducer casing 20 is prevented. Output gears 25l, 25r which generates large thrust force on the final stage in each gear train of the speed reducers 2l, 2r both generates inward forces, so that the center casing 20a does not receive forces in directions in which the left and the right casings 20bl, 20br is separated therefrom.. ... Ntn Corporation

05/17/18 / #20180137962

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

05/17/18 / #20180135702

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

05/17/18 / #20180135668

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

05/17/18 / #20180134264

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

05/03/18 / #20180119735

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

05/03/18 / #20180118023

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

04/19/18 / #20180109222

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

04/19/18 / #20180106296

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

04/19/18 / #20180106295

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

04/19/18 / #20180106294

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

04/12/18 / #20180099677

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

04/05/18 / #20180095008

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

03/22/18 / #20180080500

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 / #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








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