Provided are a torque detection device capable of achieving improved assemblability and quality an electric power steering device provided with said torque detection device and a vehicle. A torque sensor (TS) is provided with a pair of coils (13a 13b) two coil bobbins (18) around which the pair of coils (13a 13b) ar...

Low cost construction of a steering apparatus is provided that is capable of protecting an operator"s knees 28 during an automobile collision. A tilted plate 30 is arranged below and behind a bottom end section of a housing 21 which is a component of an electric power assist mechanism 20 connected to a front end...

A hub unit bearing H1 includes a rotational speed detector 9 which is made up of an encoder 6 and a sensor 8. A seal 5b on a side facing a center side of a vehicle includes a primary seal 5bp and a secondary seal 5bq which are disposed in that order in an axial direction from rolling elements 32 on a side facing the...

[Purpose] To provide an apparatus for controlling an electric power steering apparatus such that by correcting a dead time compensation amount on the basis of the temperature of a switching element inconsistency between a dead time and a dead time compensation value can be limited distortion in motor current or deve...

A steering device is provided with: a steering column having a cylindrical outer column and a cylindrical inner column which has a part thereof inserted into the outer column the steering column rotatably supporting an input shaft connected to a steering wheel; two telescopic adjustment sections protruding from the ...

Construction is achieved that is capable of ensuring strength while making the thickness of part of a hollow cylindrical shaped steering column 10b thin. A drawing process is performed on the front-end section of a cylindrical member 19 that is made of an iron alloy to make the inner diameter of the front-end sur...

A bearing residual life prediction method, a bearing residual life diagnostic apparatus and a bearing diagnostic system can be provided. The bearing diagnostic system 20 includes: an eddy current tester 11 that measures the impedance X of a certain portion of a bearing 24 before and after the use of the bearing; a b...

[Problem] To provide an electric power steering device capable of reducing a sense of discomfort due to noise when steering or when executing low speed steering and capable of achieving smooth steering without phase delay during high speed steering. [Solution] An electric power steering device includes a torque cont...

Provided are a method and system for producing a ring-shaped member said method and system improving production efficiency. A punching process is carried out on an axial intermediate part of a first intermediate annular material (25) so as to produce a pair of ring-shaped members (a first ring-shaped member 28A and ...

The problem addressed by the present invention is to further improve the durability ball circulation performance and processing performance of a ball screw having a grooved ball return path (a ball circulation groove). The ball screw is provided with: a screw shaft (201) having a helical groove (201a) formed on the ...

The present invention addresses the problem of providing: a motor control device which uses a one shunt type current detection circuit to detect motor current and with which unpleasant phenomena do not take place and current command value and duty command value fluctuations do not occur even if a duty fluctuation ca...

ABSTRACT There is provided an air motor and an electric painting device capable of improving driving efficiency. To that end, a housing (12), a main shaft (2) inserted inside of the housing, an impeller (4) fixed concentrically with the main shaft to an inserted portion of the main shaft inside of the housing and ha...

Provided is the structure of a cam device in which a drive side cam can be effectively prevented from rotating relative to a driven side cam in a locked state. Tip abutting parts (63) are provided to the outside diameter portions of tip surfaces (41a (40a)) of either the drive side convex parts (34a) of a drive side...

A creep resistant rolling bearing device (21) is configured in such a manner that the inner ring (12) is provided with a first key groove (13) which is formed at an axial end (12t) of the inner ring (12) and which is open at the inner peripheral surface (12i) of the inner ring (12). The first key groove (13) is prov...

The present invention provides a motor control apparatus that is capable of making the whole system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances and an electric power steering apparatus mounting the...

Provided is a joining structure and a joining method thereof the joining structure enabling a desirable joining strength to be achieved between members that constituting the joining structure. Accordingly a joining structure (1) has a shaft member (10) and a thin walled cylindrical member (20) in which the inner per...

A ball bearing equipped with an encoder rotatably supports a wheel of a two-wheeled motor vehicle, can detect the rotational speed of the wheel, and sufficiently prevents foreign matter from entering into the space (19) within the bearing. The opening of an end of the space (19) within a bearing is closed by a comb...

A wheel support structure for a two-wheeled vehicle, configured either in such a manner that an encoder mounting plate is mounted to an end of the outer ring of one rolling bearing in the axial direction, the end being located on the other rolling bearing side, and a magnetic encoder for detecting rotational speed i...

There is provided an abnormality diagnosing method for a torque detecting device, so as to provide a reliable torque detecting device, and an electric power steering device using the torque detecting device. Immediately after the power supply is turned on and before steering auxiliary control is started, the initial...

A structure is realized which can prevent a flat- plate-portion (21) of a cover (19a) from being distorted or deformed in the axial direction when a cylindrical portion (20) of the cover (19a) for blocking an axial inner end opening of an inner space (17) in which an encoder (1) is installed is securely fitted into ...

There is provided a method enabling the formation of a ball recirculation groove and a ball rolling groove at the inner circumferential surface of a nut for ball screw use in a state free of deviation in an axial direction, circumferential direction, and radial direction of the nut. An end face (111a) of a flang...

Provided is a ball screw in which an outer 5 circumferential formation such as a flange is formed at a portion facing a ball circulating passage out of outer circumferential surface of a nut. The ball screw (1) includes: a screw shaft (3) having on its outer circumferential surface a screw groove (3a); a nut (5...

The purpose of the present invention is to provide: a joint structure with which members configuring the joint structure can be suitably joined; and a joining method therefor. Accordingly a joint structure (1) is provided with: a shaft member (10); and a cylindrical member (20) which has an inner peripheral surface ...

[Problem] To achieve a structure that can reliably prevent the occurrence of creep between a pulley (2b) and an outer ring (1f). [Solution] The intersection angle (Θ) of the inside surfaces (23) on the two sides of each recessed part (17a) of the knurled pattern (19a) of the outer ring (7f) is 45° ≤ (Θ) ≤ 120° and t...

The invention achieves a structure designed to reduce manufacturing cost when the axial position of a pulley device (9a) with a built-in one-way clutch with respect to a rotating machine (1a) differs. Placing a circular spacer (35) between an end face of the sleeve (10a) of a pulley device (9a) with a built in one w...

When a telescopic gear base 6 and a telescopic gear member 8 are relatively brought close to each other, although their centers shift from each other, even when a tooth tip of a tooth (first tooth) 6a on one surface and a tooth tip of a tooth (second tooth) 8a on one surface contact with each other (at Opoint in ...

Provided is Q hub unit bearing wliich permits securing of the lining strength of a cover (39) with respect to an outer race member (34) and which has a structure that is not susceptible to intrusion of for- eign maner to the inside through drain hole (73) that is provided to the cover (39), The cover (39). which...

A rolling bearing according to the invention is configured such that fitting grooves of a rotating ring for mounting seal devices are respectively formed on both end surfaces of the rotating ring into same shapes, that seal grooves of a stationary ring are respectively formed on both end surfaces of the stationary r...

There is provided a torque detecting device for providing a highly accurate torque signal, and an electric power steering device using the torque detecting device. A torque sensor (20) is provided with a first coil pair (22A) and a second coil pair (22B), which detect a relative displacement between an input sh...

PROVIDED IS A METHOD FOR FORMING A RECESSED PORTION SERVING AS A BALL RETURN PATH BY PLASTIC WORKING DIRECTLY ON THE INNER CIRCUMFERENTIAL SURFACE OF A NUT WORKPIECE WITHOUT DAMAGE TO A MOLDING DIE EVEN WHEN MANUFACTURING A NUT THAT HAS AN AXIALLY LONG LENGTH BUT A SMALL INNER DIAMETER. THE NUT WORKPIECE (1) IS PROV...

A pivot bearing device (13) is provided with: a shaft (21); and rolling ball bearings (20) which are arranged in the direction of the axis of the shaft (21) and which have inner rings (27) affixed to the shaft (21). The outer rings (25) are affixed to the affixation hole (18) of an arm (16) with a tolerance ring (12...

[Problem] To regulate the axial-direction length of protrusions without increasing the production cost of a yoke cover that is fitted into two electromagnetic yokes that constitute a torque detection device. [Solution] A yoke cover 1 that is fitted into the inner diameters of cylindrical parts of two electromagnetic...

[Problem] To reduce the production cost of a yoke cover that is fitted into the inner diameters of cylindrical parts of two electromagnetic yokes that constitute a torque detection device and that holds the two electromagnetic yokes. [Solution] A yoke cover 1 that is fitted into the inner diameters of cylindrical pa...

This torque detection device comprises a lower shaft (21) that is a torque transmission shaft, and a cylindrical torque detection sleeve (14) having a part on the front side in the shaft direction that has a plurality of window holes (36a, 36b). A cylindrical part (29) of the lower shaft (21) comprises circumferenti...

In order to provide an electric power steering device in which a time stamp is applied for each reception of detection signals from sensors to obtain accurate synchronization so as to reduce angle error and increase the steering speed at which the steering angle can be detected, the present invention provides an ele...

[Problem] To provide a motor control device and an electric power steering device equipped with the same which can accurately perform temperature detection of an inverter with a low cost configuration and no time delay and which can perform overheat protection control of an electronic component on the basis of the d...

[Problem] To provide an electric power steering device that has a plurality of dead time compensation functions that compensate inverter dead time and without tuning work: switches dead time compensation functions and compensates in accordance with a steering state; improves steering performance; improves current wa...

[Problem] To provide an electric power steering device that has a plurality of dead time compensation functions that compensate inverter dead time and without tuning work: gradually by mixing switches and compensates dead time compensation functions in accordance with a steering state; improves steering performance;...

Provided is an electric power steering device, which can perform assist control for which variations in steering feel are suppressed. The electric power steering device is provided with a current command value calculation unit 31 for outputting a current command value Iref1 corresponding to steering torque Ts and ve...

To provide an electrical power steering device that calculates a front wheel estimated steering angle from the wheel speed of the left and right front wheels calculates a rear wheel estimated steering angle from the wheel speed of the left and right rear wheels and calculates a four wheel estimated steering angle us...

A joint cross type universal joint yoke in which the formation directions of a through hole (17a) and a screw hole (18a) are inclined relative to the central axis of circular holes (19a 19a) formed in a pair of engagement arm parts (12 12). In addition by tightening a bolt (32) and by first and second flange parts (...

A joint cross type universal joint yoke in which the phases of the array direction (X) of a pair of coupling arm parts (12 12) and the array direction (Y) of a first and a second flange part (14a 15a) are offset in the circumferential direction. In addition by tightening a bolt (32) and by the first and second flang...

An object of the present invention is to provide a brushless motor that is smaller in appearance configuration, lighter, and easy to manufacture, and has a terminal connecting mechanism with an integral structure including mounting of a motor bus bar and an ECU terminal, and an electric power steering apparatus and...

[Problem] To provide an electric power steering device of which reliability is increased by a redundant system in which independent detection signals are compared and diagnosed while the detection signals are individually diagnosed and which can continue functioning without adversely affecting reliability. [Solutio...

[Problem] To provide an electric power steering device which has multiple angle sensors mounted on the steering shaft in addition to an angle sensor mediated by a gear mechanism and which learns characteristics of the gear mechanism and monitors and performs diagnostics by using the learning results and the signal o...

An axial end of the outer peripheral surface of the inner ring of a rolling bearing of a bearing unit for an air turbine has a sloped surface the diameter of which changes from large to small toward the downstream side in the direction in which compressed air is supplied. A seal member does not have a metallic core ...

A single-row deep groove ball bearing includes: an outer ring including an outer ring raceway groove formed In an inner circumferential surface thereof; an inner ring including an inner ring raceway groove formed in an outer circumferential surface thereof; and a plurality of balls provided rollably between the o...

A motor control device for performing PWM control of an inverter for driving a three-phase brushless motor on the basis of a current command value, wherein the motor control device is provided with: a voltage command value computation unit for calculating a voltage command value using the current command value, and ...

[Problem] To provide an electric power steering apparatus capable of manual input determination with high accuracy free of the influence of noise associated with a free vibration system without being affected by disturbance. [Solution] An electric power steering apparatus which controls the drive of a motor for appl...

[Problem] To provide: a motor control device based on a vector control method said motor control device improving the strain of a current waveform and enhancing responsiveness to current control by compensating for a dead time of an inverter and estimating a disturbance that cannot be compensated for through the dea...

[Problem] To provide a vector control-type motor control device that compensates for inverter dead time without requiring a tuning operation, improves current waveform distortion and current control responsiveness, and suppresses noise, vibrations and torque ripples. [Solution] Disclosed is a vector control-type mot...

The present invention mitigates a decrease in motor output torque which occurs when a power supply current supplied from a power supply to a motor is limited to be less than or equal to a predetermined upper limit value. The motor control device (30) is provided with: a power supply voltage detection unit (64) for d...

The present invention provides a method for diagnosing a rolling device (10) comprising an outer member (1), an inner member (3), and a rolling element (5), wherein an AC voltage is applied to an electric circuit configured from the outer member (1), the rolling element (5), and the inner member (3), impedance and p...

This actuator control device comprises: a steering control value calculation unit (40) that calculates, on the basis of an operation state amount pertaining to a steering mechanism of a vehicle operated by a driver, a steering control value for controlling an actuator (20) that steers a steering wheel; a target valu...

Provided is a multi-row thrust ball bearing that has a large load capacity, is thin, and can bear a radial load. According to the present invention, facing surfaces of a pair of races (21, 22) have multiple rows of race grooves (23A, 23B) that are provided along the radial direction. Circumferential edges of opening...

A rolling bearing (1) is provided with: an outer ring (10); an inner ring (20); a plurality of rolling bodies (3); and a seal member (30) that is provided to an axial one end part of a bearing internal space S between the outer ring (10) and the inner ring (20) and that is formed from an elastic body without a core ...

A rolling bearing (1) is provided with: an outer ring (10); an inner ring (20); a plurality of rolling bodies (3); and a seal member (30) that is provided to an axial one end part of a bearing internal space (S) between the outer ring (10) and the inner ring (20) and that is formed from an elastic body without a cor...

This rolling bearing (10) comprises: an outer race (11) having an outer raceway surface (11a) on the inner peripheral surface thereof; an inner race (12) having an inner raceway surface (12a) on the outer peripheral surface thereof; a plurality of rolling elements (13) disposed so as to be capable of rolling between...

This motor control device is provided with: a third harmonic calculation unit (60) for calculating a first third-harmonic on the basis of an average of the voltage command value of the maximum phase having the maximum duty ratio among three-phase voltage command values and the voltage command value of the minimum ph...

Provided is a method for evaluating the purity of steel material by an ultrasonic flaw detection process, the evaluation method enabling rapid acquisition of reliable data. Ultrasonic flaw detection is performed so as to detect flaw in at least a part of 90% to 100% inclusive of the areas of steel material (such as ...

[Problem] To provide an electric power steering device configured to prevent incorrect output by calculating an estimated front wheel steering angle from the speeds of left and right front wheels calculating an estimated rear wheel steering angle from the speeds of left and right rear wheels calculating estimated st...

The objective of the present invention is to detect abnormal sounds from a steering system which includes a column shaft that rotatably supports a steering wheel, and which steers wheels in accordance with rotation of the column shaft. A microphone disposed facing a column shaft end portion on the steering wheel sid...

Provided are: a coil; a pair of flange parts sandwiching the coil; a terminal attachment part provided projecting outward in the radial direction of the coil from one of the flange parts the terminal attachment part having a first side surface and a second side surface that face opposite the circumferential directio...

Provided are an electric drive device and an electric power steering device in which an increase in the temperature of a magnetic sensor is suppressed. An electric drive device according to the present invention is provided with: an electric motor; an electronic control device including a magnet that is provided at ...

[Problem] To provide an electric power steering device which has a plurality of dead time (DT) compensation functions that perform DT compensation wherein the DT compensation functions are switched between to perform compensation in accordance with the steering state and function thereby improving steering performan...

[Problem] To provide a high-performance electric power steering device in which steering can be smoothly switched by means of a simple configuration when a driver steers a steering wheel during automatic steering control, and which does not give the driver a feeling of discomfort. [Solution] This electric power stee...

[Problem] To provide a vector control-type motor control device that compensates for inverter dead time without requiring a tuning operation, improves current waveform distortion and current control responsiveness, and suppresses noise, vibrations and torque ripples. [Solution] Disclosed is a vector control-type mot...

[Problem] To provide an electric power steering device in which both assist control and steering angle control can be performed in such a manner as to enable a manual steering operation when automatic steering is interrupted by a driver"s manual steering operation so as to ensure increased safety during an emergency...

Provided are a motor control device and an electrical power steering device which are configured to perform a correction for advancing an estimated motor electrical angle in response to a steering torque, and are thus capable of correcting an estimated angle error, acting in a delaying direction with respect to the ...

An axial end of the outer peripheral surface of the inner ring of a rolling bearing of a bearing unit for an air turbine has a sloped surface, the diameter of which changes from large to small toward the downstream side in the direction in which compressed air is supplied. A seal member does not have a metallic core...

Provided is a roller bearing such that the binding force of a seal member is strengthened. This roller bearing is equipped with an outer ring having on the inner circumferential surface thereof an outer ring raceway surface, an inner ring having on the outer circumferential surface thereof an inner ring raceway surf...

To provide a roller bearing capable of suppressing the occurrence of white etching area flaking. A roller bearing comprising a structure in which the dissolved carbon content in the martensite structure after heat treatment is 0.35-0.65 mass% and the volume fraction of spheroidized carbides having a diameter of 200 ...

The present invention provides a grease composition which makes it possible to prevent deterioration in sealing properties even when base oil having a kinetic viscosity of as low as, for example, 5-40 mm2/s is used and which makes it possible to realize both sealing properties and a decrease in torque. The present i...

This method for manufacturing a ball screw device comprises a nut unit preparation step, a screw shaft preparation step, and an assembly step. In the nut unit preparation step, a nut unit is prepared in which a circulating component, balls, and a provisional shaft for preventing dropping of the balls are assembled t...

A rolling bearing comprising an inner ring, an outer ring, a plurality of rolling elements, a slinger, and a sealing member. The slinger is fixed to the outer peripheral surface of the inner ring on the axially outer side relative to the inner ring raceway surface of the inner ring. The slinger has a first cylindric...

The purpose of this invention is to provide a vibration diagnosis device that is capable of simply and effectively carrying out accurate vibration analysis. This vibration diagnosis device is for diagnosing vibration of an object on the basis of an input signal from the outside. The vibration diagnosis device compri...

This detecting method, for detecting the state of a bearing device configured to include a plurality of rollers and first and second members constituting rolling surfaces for the plurality of rollers, includes applying an alternating current voltage to an electric circuit formed from the plurality of rollers and the...

Disclosed is a state detection method for detecting a state of an oil film formed by a lubricant within a device configured such that the lubricant lubricates a plurality of sections, the method comprising: a measurement step for measuring an impedance and a phase angle of an electric circuit constituted by the plur...

This state diagnosis method comprises a measurement step for measuring relative permittivities of a lubricant by applying a voltage to the lubricant using an AC power supply while changing the frequency, a derivation step for deriving a parameter expressing an electrical characteristic of the lubricant by applying t...

This temperature derivation method for deriving the oil film temperature of a lubricant inside a device comprises: a measurement step for measuring the dielectric constant of the lubricant by applying an alternating-current voltage, while changing the frequency, to an electric circuit formed by the device; a derivat...

A detection method of the state of a bearing device comprising an outer member, an inner member, and a plurality of rolling bodies, wherein while the bearing device is being applied a given load, an AC voltage is applied on an electric circuit formed by the outer member, the inner member, and the plurality of rollin...

This resin-made retainer (40) comprises: at least one annular section (41); and a plurality of pillar sections (42) which respectively extend in the axial direction from the annular section (41) and rotatably hold balls (11) in cylindrical or partially cylindrical pockets (P) provided between neighboring pillar sect...

[Problem] To provide a ball screw device with which it is possible to effectively prevent a fitting shaft part of a screw shaft from slipping out of a fitting member in the axial direction even when a moment around an axis perpendicular to a center axis acts on the screw shaft or the fitting member. [Solution] The f...

This flaking development analysis method involves: acquiring the presence or absence of flaking of a raceway ring and the shape of a flaked portion; calculating a rolling element load acting on a rolling element, in consideration of progression in the shape of the flaked portion, when the rolling element passes an e...