Nsk Corporation

Hiroshi Shibazaki

Seiichi Moriyama

Kiyoshi Sadakata

Takashi Maeda

Toru Segawa

Shinji Okada

Takeshi Yamamoto

Katsuhisa Tonooka

Kazuhiko Kojima

Masajirou Watanabe

Hiroki Mizuno

Shigeo Tokura

Tamotsu Waga

Takeo Kawamata

Kazuyasu Chiba

Seiichi Hagiwara

Kenji Fujikawa

Toshimasa Wada

Toru Takahashi

Hiroyuki Kudo

Nobuo Iwatani

A torque transmission joint has a shock-absorbing member between a drive shaft and a driven shaft. When the drive shaft is rotated in one direction, forces due to torque transmitted from the drive shaft to the driven shaft act inward in a radial direction of the shock-absorbing member on held sections that are held between one side surfaces in the circumferential direction of drive-side arm sections that are positioned in the front side in the one direction of rotation of the drive shaft, and side surfaces in the circumferential direction of driven-side arm sections that are positioned on the rear side in the one direction of rotation of the drive shaft.

Torque transmission joint and electric power steering apparatus

A shock-absorbing member comprises held sections located at a plurality of locations in a circumferential direction and comprising paired held sections and non-paired held sections, and is constructed to have a non-circular cylindrical shape in cross-section. Portions where outer-diameter side end sections of held sections that are adjacent to each other in the circumferential direction are made continuous by way of outer-diameter side cover sections, and portions where inner-diameter side end sections of held sections that are adjacent to each other in the circumferential direction are made continuous directly or by way of inner-diameter side cover sections, in an alternating sequence in the circumferential direction. Drive-side arm sections are placed between the non-paired held sections, driven-side arm sections are placed between the paired held sections, and the outer circumferential surfaces of the drive-side arm sections are covered by the outer-diameter side cover sections.

An electric power steering apparatus capable of being both lightweight and rigid. A lightweight electric power steering apparatus is achieved wherein a gear housing () that houses an electric assist mechanism, a lower support bracket () for fastening the gear housing () to the vehicle body, a sensor housing () that houses a torque sensor (), an outer column () of a steering column (), and an upper support bracket () for fastening the middle section of the outer column () to the vehicle body can all be integrally formed of synthetic resin, improving the strength of the joined sections of these members.

Column unit for an electric power steering apparatus

Construction is achieved that more completely protects the driver of a vehicle during a secondary collision by gradually increasing the impact load that is absorbed by an energy absorbing memberthe more the steering wheel displaces in the forward direction. The energy absorbing membercomprises a base sectionthat is provided in the center section, and a pair of impact absorbing sectionsthat extend in the forward direction from both ends of the base sectionand have U-shaped bent back curved sectionsin the middle section. Of these impact absorbing sections, at least the portions that are nearer the tip end side than the bent back curved sectionsare pressed so that the height of the energy absorbing memberwith respect to a stroking sectiongradually increases going in a direction from the bent back curved sectionstoward the tip end side of the energy absorbing sections

Energy absorbing member and impact absorbing steering apparatus

Construction is achieved wherein upward displacement of a steering columnduring a secondary collision is prevented, and the distance D between the steering columnand the tip end section of an adjustment leveris kept the same regardless of the up/down position of the steering wheel. The position of the adjustment leverafter rotation is maintained by the tip end section of a locking armthat is provided on the base end section of the adjustment armengaging with a locking grooveof a locking piecethat is provided on a support plate section. The direction of formation of the locking grooveis such that when the up/down position of the steering wheelis in an upward position, the top end section of the locking grooveengages with the tip end section of the locking arm, and when the up/down position of the steering wheelis in a downward position, the bottom end section of the locking grooveengages with the tip end section of the locking arm

Steering column apparatus

Provided is an electric power steering apparatus that is both lightweight and rigid. A lightweight electric power steering apparatus is achieved wherein a gear housingthat houses an electric assist mechanism, a lower support bracketfor fastening the gear housingto the vehicle body, a sensor housingthat houses a torque sensor, an outer columnof a steering column, and an upper support bracketfor fastening the middle section of the outer columnto the vehicle body are all integrally formed of synthetic resin with glass fibers, improving the strength of the joined sections of these members.

To provide a steering column system which has superior operating feeling and operating properties which can suppress an operational failure, an engaging arm is displaced relative to a cam member by an annular member that is deformed elastically. Distal ends of gear teeth are made to shift from each other, making it possible not only to enhance the feeling of the operation lever, but also to facilitate meshing of the gear teeth.

Steering column system

When a telescopic gear baseand a telescopic gear memberare relatively brought close to each other, although their centers shift from each other, even when a tooth tip of a tooth (first tooth)on one surface and a tooth tip of a tooth (second tooth)on one surface contact with each other (at C-point in FIG.()), the telescopic gear baseand the telescopic gear membercan continue the relative movement in direction of an arrow (FIG.()) from such the state, because they contact with each other and intermeshed so that each angle with their tooth continuing directions is set larger than 0&#xb0; and smaller than 90&#xb0;. Therefore, since the telescopic gear baseand the telescopic gear memberintermesh gradually to slide, the toothand the toothreadily intermesh during slide (at D-point in FIG.()).

The present ball/roller bearing cleaning method is a method which, using cleaning liquid, cleans a bearing to be cleanedcomposed of an inner ring, an outer ring, a rolling bodiesand a retainer. In the cleaning method, the cleaning liquidis made to flow through the bearing to be cleanedfrom the axial direction of the present bearinginto spaces in which the raceway surfaces of the inner and outer ringsandof the bearing to be cleanedsurround the rolling bodiesand retainer. For example, a cylindrical-shaped rotary diehaving spiral groovesis interposed into a cleaning liquid supply passage, and the cleaning liquidis supplied to thereby rotate the cylindrical-shaped rotary die, whereby the cleaning liquid having high pressure can be supplied to the bearing to be cleanedfrom the cylindrical-shaped rotary die

Ball/roller bearing cleaning method and apparatus thereof

The present ball/roller bearing cleaning method is a method which, using cleaning liquid , cleans a bearing to be cleaned composed of an inner ring , an outer ring , a rolling bodies and a retainer. In the cleaning method, the cleaning liquid is made to flow through the bearing to be cleaned from the axial direction of the present bearing into spaces in which the raceway surfaces of the inner and outer rings and of the bearing to be cleaned surround the rolling bodies and retainer. For example, a cylindrical-shaped rotary die having spiral grooves is interposed into a cleaning liquid supply passage, and the cleaning liquid is supplied to thereby rotate the cylindrical-shaped rotary die , whereby the cleaning liquid having high pressure can be supplied to the bearing to be cleaned from the cylindrical-shaped rotary die

Ball/roller bearing cleaning apparatus

In a ball bearing having an inner ring and an outer ring independently supported in a relative displacement manner, balls are arranged by placing the balls in an annular space between the inner ring and the outer ring, placing nozzles beside the inner ring and the outer ring, the number of which is at least the same to that of the balls, making each of the nozzles face the opening on one side of the annular space between the inner ring and the outer ring, and causing stream of fluid by each of the nozzles to make the balls move circumferentially, so that the balls are arranged circumferentially with a uniform interval, wherein when the stream is caused by each of the nozzles, one of the inner and outer rings is relatively displaced with reference to the nozzles and the other ring, so that the relationship in position between the nozzles and the balls is changed.

Method and apparatus for arranging balls with uniform interval in ball bearing

A ball bearing inspection apparatus,comprising: a rotation shaft,fitted to one (for example, inner race,) of inner and outer races,and,for rotating one race while limiting the movement of one race in an axial direction of the rotation shaft,a press plate,disposed on an opposite side of the rotation shaft,with respect to a ball bearing,for pressing the other race (for example, outer race,) in the axial direction of the rotation shaft,while limiting the rotation of the other race; and a press-back plate,provided so as to be movable in the axial direction of the rotation shaft,for pressing back the other race in a direction reverse to the pressing direction of the press plate,Hence, the ball bearing inspection apparatus can inspect a large area of ball surfaces in a short time at one installing try.

Ball bearing inspection apparatus

A preload measuring apparatus to measure the preload of a rolling bearing that includes a bearing support, a pressurization device, an excitation device, a vibration sensor, and a control section. The bearing support supports a rolling bearing by supporting both ends of a shaft inserted into an inner ring of the rolling bearing. The pressurization device loads a predetermined weight in the axial direction onto the rolling bearing. The excitation device applies vibration onto the rolling bearing by the drive of the piezoelectric elements. The vibration sensor detects the vibration generated on the rolling bearing by the vibration application of the excitation device. The control section operates the excitation device in the situation that the pressurization device presses the rolling bearing, and obtains the resonance frequency by the output signal from the vibration sensor and calculates the preload of the rolling bearing according to the obtained resonance frequency before the predetermined weight as loaded.

Growing community of inventors

Gunma, Japan

Hiroshi Shibazaki