NSK Ltd. | Date: 2016-03-09
A supporting apparatus (10) for a steering bracket includes a capsule support portion (59) of a steering bracket supporting a steering column, a separation capsule (11) to fix a vehicle body-side member (21) to the steering bracket, a resin member (12P), a shear pin (13), and an inertial action body (15) including a weight portion (15G) moving to a front side of a vehicle by inertia due to a primary collision and pulling out the shear pin (13) from a second bracket-side hole (59I) with the movement.
NSK Ltd. | Date: 2016-02-10
Provided are a method for testing a life of a radial rolling bearing and a radial rolling-bearing testing device. According to the method for testing the life of the radial rolling bearing and the radial rolling-bearing testing device, a portion of the radial rolling bearing is immersed in lubricant, and a bearing life is tested by rotating an outer ring and an inner ring relative to each other in a state where a radial load is applied to the radial rolling bearing. The radial load is applied in a horizontal direction.
NSK Ltd. | Date: 2016-08-31
[Problem] An object of the present invention is to provide an electric power steering apparatus that is capable of positively returning a steering wheel to a neutral point in such a running state as to return to a going straight state by calculating a return control current corresponding to a steering angle and a steering speed and compensating a current command value. [Means for solving the problem] An electric power steering apparatus comprising: a steering wheel return control section that calculates a return control current with a steering angle, a vehicle speed and a steering speed, and drives a motor with a compensated current command value left by the subtraction of the return control current from a current command value, wherein the steering wheel return section comprises a base-return control current calculating section that calculates a base-return control current, a target steering speed calculating section that calculates a target steering speed, a return control gain calculating section that calculates a deviation between the target steering speed and the steering speed, performs coding, and at a same time calculates a return control gain by using at least two control calculations among a P-control calculation, an I-control calculation and a D-control calculation, a limiter that limits a maximum value of the return control gain, and a correcting section that corrects the base-return control current with an output gain of the limiter and outputs the return control current.
NSK Ltd. | Date: 2016-06-01
The present invention addresses the problem of implementing a pulley device with an embedded unidirectional clutch, with which the influence of auxiliary automobile machinery on a rotary shaft due to fluctuations in the rotation of the engine can be sufficiently reduced. A sleeve (1b) is configured from an inner-diameter-side sleeve (24) and an outer-diameter-side sleeve (25), a unidirectional clutch (3) is provided between the outer-diameter-side sleeve (25) and a pulley (2), and a coiled torsion spring (18a) capable of transmitting torque between the inner-diameter-side sleeve (24) and the outer-diameter-side sleeve (25) is provided between these members (24, 25). When the rotational speed of the pulley (2) becomes slower than the rotational speed of the outer-diameter-side sleeve (25), the inner-diameter-side sleeve (24) and the outer-diameter-side sleeve (25) rotate relative to one another due to the elastic force of the coiled torsion spring (18a), until the elastic force of the coiled torsion spring (18a) is released, after which the unidirectional clutch (3) becomes incapable of transmitting torque between the pulley (2) and the outer-diameter-side sleeve (25).
NSK Ltd. | Date: 2016-12-07
A width dimension W_(33) of a discontinuous portion (33) disposed in one circumferential place of a base portion (31a) of a yoke (29a) is less than a diameter dimension D_(22) of a connecting pin (22) (W_(33)
NSK Ltd. | Date: 2016-01-06
Construction of a retainer for a radial needle bearing is achieved that is able to prevent needles 4 from coming out of pockets 5a even before assembling the radial needle bearing, and is able to sufficiently lessen stress concentration due to force being applied to column sections 3a caused by variation in the speed of revolution of the needles 4. The center sections in the axial direction of the columns 3a are located further on the inner-diameter side than the diameter of the pitch circle of the needles 4, and both end sections in the axial direction of the column sections 3a are located further on the outer-diameter side than the diameter of the pitch circle of the needles 4. Thick sections 13 are formed in portions on both end sections in the axial direction of the column sections 3a that are continuous with the pair of rim sections 2a.
NSK Ltd. | Date: 2016-04-20
A supporting apparatus (10) for a steering bracket includes: a capsule support portion (59) of a steering bracket that is used to support a steering column; a separation capsule (11) that is used to fix a vehicle body-side member (21) to the steering bracket; a resin member (12P); a shear pin (13D); and a cam mechanism (13A) by which a weight portion (13W) rotates around the shear pin (13D) by inertia due to a primary collision and moves to a front of a vehicle and the shear pin (13D) is pulled out from the second bracket-side hole (591) with the rotation.
NSK Ltd. | Date: 2016-03-16
A steering apparatus includes: an input shaft of which one end is connected to a steering wheel; and a steering column that rotatably supports the input shaft. The steering column includes a cylindrical outer column and a cylindrical inner column that is partially inserted into the outer column and guides the outer column in an axial direction. The inner column has a stopper, which regulates a movable range of the outer column in the axial direction, provided on an outer circumferential surface, and the stopper allows the range to be enlarged when deformation or movement thereof occurs due to inertial force.
NSK Ltd. | Date: 2016-10-19
A sealing mechanism functioning as a separator between two spaces having different pressures includes: a housing; a shaft inserted into the housing; an annular sealing member sealing a gap by contacting a radial outer surface of the shaft or a radial outer surface of a rotary portion fixed to the shaft; and a lubricant groove storing a lubricant to be supplied between the annular sealing member and the radial outer surface.
NSK Ltd. | Date: 2016-08-24
There are provided a ball screw that more efficiently prevents accumulation and scattering of extra grease in a nut and a seal used in the ball screw. In order to do that, in a ball screw (1), a grease reservoir portion (33) is provided on an inner peripheral surface of a seal (30) provided at at least one end of ends of a nut (20) in a moving direction of the nut (20) so as to form a space with respect to a screw shaft (10). The grease reservoir portion is open to an outer peripheral surface of the seal (30) and communicates with slits (34) formed on the outer peripheral surface of the seal (30).