Koyo Seiko Company, Ltd.

Jtekt Corporation

Utsunomiya Kiki Co., Ltd.

Nobutsuna Motohashi

Hirochika Ueyama

Manabu Taniguchi

Yasuhiko Ishii

Naoki Morimura

Tetsuaki Numata

Tadashi Fukao

Kenji Ooiso

Shiro Masuda

Yoshinori Tsuboi

Kenji Takahashi

Yoshitaka Waseda

Takashi Hosokawa

Yoshifumi Shige

Katsura Koyagi

Yasutaka Miyagawa

Kazuo Uchida

Fukumitsu Kitauchi

Nobuyuki Miyawaki

Yasunari Hasegawa

Fumito Kurata

Toshimichi Takahashi

Mitsuru Asai

Hiroaki Makino

A driving force transmission apparatus includes: a meshing member that switches two rotating members between a coupled state and an uncoupled state; a piston member with a plurality of locked portions formed along a circumferential direction; an armature that moves the piston member forward and backward between a first position where the armature presses the piston member in an axial direction and a second position where the armature does not press the piston member; a biasing member that biases the piston member in the opposite direction from the pressing direction of the armature; and a locking member that locks the locked portions. The piston member has a mechanism that mitigates a possible shock when the locking member comes into abutting contact with an abutting contact surface of a first locked portion.

Driving force transmission apparatus

A first spacer, a second tubular member, and a second spacer are externally fitted and fixed to an outer peripheral surface of a nut. The second tubular member is formed by stacking a plurality of silicon steel plates without any gap, and is arranged between the first spacer and the second spacer axially. The outer diameter of an outer peripheral surface of the second tubular member is made larger than the outer diameter of an outer peripheral surface of the first spacer and the outer diameter of an outer peripheral surface of the second spacer. A detection surface of a first displacement detector is made to radially face a contact portion between the second spacer and the second tubular member, while a detection surface of a second displacement detector is made to radially face a contact portion between the first spacer and the second tubular member.

Rolling bearing device with sensor

A rolling bearing unit having a sensor comprising:

Rolling bearing unit having sensor

To provide a vehicle-wheel rolling bearing capable of further improving the reliability of a sensor by preventing a temperature drift. A vehicle-wheel rolling bearing H includes a cylindrical fixed ringwhich is fixed to a vehicle body; rotary ringsandwhich are inserted through the fixed ringso as to be rotatable therein; and plural rows of rolling elementswhich are disposed between the fixed ring and the rotary ring so as to roll. A vehicle-outboard-side end of an annular sensor housinghaving plural displacement sensorsdisposed in a circumferential direction thereof so as to detect a gap with respect to the outer peripheral surface of each vehicle-inboard-side end of the rotary ringsandis press-fitted to the inner peripheral surface of the vehicle-inboard-side end of the fixed ring. In addition, the displacement sensorsare coated by a synthetic resin or a rubber-based material so as to be integrally formed with the sensor housing

Vehicle-wheel rolling bearing

A magnetized pulsar ring of the invention is a pulsar ring fixed to an outer peripheral surface of a supporting member and including a ring body in which a number of magnetic poles are at predetermined intervals in a peripheral direction. The ring bodyis formed of a plastic magnet, and has a cushion member made of an elastic body that is interposed between the ring body and the outer peripheral surface.

Magnetized pulsar ring, and rolling bearing device with sensor using the same

A rolling bearing assembly for a wheel includes a cylindrical fixed bearing ring fixed to a vehicle body side, a rotary bearing ring rotatably inserted to inside of the fixed bearing ring, and plural rows of rolling elements rollably arranged between the bearing rings. An annular sensor housing is attached to an inboard side end portion of the fixed bearing ring and includes a plurality of displacement sensors for detecting gaps between the displacement sensors and outer peripheral surfaces of inboard side end portions of the rotary bearing ring in a circumferential direction. Further, an inboard side end portion of the sensor housing is sealed by an inner side seal device.

Rolling bearing assembly for wheel

A rolling bearing device with a sensor includes a rotational component estimator that extracts a rotational synchronization component included in the rotation of an inner shaft relative to an outer ring from each of a signal output by a first displacement detector and a signal output by a second displacement detector. The rotational component estimator performs rotational operation and integration operation.

A rocker armmade of sheet metal is formed so that Vickers hardness Hof the surface layer portionof the valve stem receiveris set at H650 to 800 and a quantity of the retained austenite &#x3b3;R is set at 25 to 35 vol %.

Rocker arm and method of manufacturing the same

When forces given in the processes of machining in the cross direction and machining for forming a groove are adjusted and the machining is repeatedly conducted by a plurality of times, the valve engaging portion () is machined, and the metal flow () formed between the valve guide walls () and the connecting wall () is prevented from being cut off. Therefore, the rigidity of the valve engaging portion () can be ensured, and the quality of the rocker arm () can be stabilized.

Manufacturing method of rocker arm

In order to improver a response of a rocker arm by reducing a moment of inertia of the rocker arm around a pivot portion thereof, the invention provides a rocker arm comprises a metal-plate-made rocker arm main body including a pivot portion and a valve stem guide portion respectively formed in the longitudinal-direction two end portions thereof. In the provided rocker arm, the center-of-gravity position of the rocker arm main body is set at a position shifted to the pivot portion side from the longitudinal-direction center thereof. Moreover, The clearance between a pair of opposing side wall portions formed in the valve stem guide portion is set narrow so that the center-of-gravity of the rocker arm main body can be set at a position shifted to the pivot portion side from the longitudinal-direction center thereof.

Rocker arm

A gap () for forming an excess thickness portion is provided between a pair of first dies () and a intermediate portion () of the second die (), and an excess thickness portion () is formed in bottom portions of the valve guide walls () of valve guide walls.

Rocker arm and manufacturing method thereof

It is an object of the present invention to provide a rocker arm having such a shape as to avoid generation of defects in a producing process and to avoid increase in weight and design change of a finished shape. A valve fitting portion of a body is formed by wall-thickening one connecting wall and recessing the connecting wall upward. In the wall thickening, a periphery of the connecting wall is pressurized and compressed from end face sides. As a result, defects such as cracking and sinking that occur in forcible guided-bending can be prevented and reduction of rigidity generated in compressing areas of the metal plate to be formed with side walls in wall thickness directions to reduce thickness of the areas as described in the description of the prior art can be avoided. Therefore, it is unnecessary to use a thick metal plate unlike in the prior art and to change design of the finished shape of the rocker arm body.

Rocker arm and method of manufacturing rocker arm body

The bearing device is press-fitted between the inside surface of the axis insertion hole of a steering column and the outside surface of a steering axis inserted into the axis insertion hole so as to support the steering axis. The bearing device comprises a roller bearing arranged on the outside surface of the steering axis and a spacer ring arranged between the outside surface of the roller bearing and the inside surface of the axis insertion hole. The spacer ring comprises a wall thickness holding unit for holding the thickness of its wall in the radius direction and a thickness reduction unit which is provided on at least one site of the inside and outside surfaces and its end in the vicinity of the wall thickness holding unit and which reduces the thickness of the wall to facilitate deformation of the spacer ring.

Bearing device

A rocker arm, which opens and closes a valve when tilted by a cam and is provided on a cylinder head, has a body made of sheet metal. The body is constituted in such a manner that one metal plate blank is bent into a substantially U shape so that a pair of opposed side walls and connecting walls for connecting the side walls are provided. A convex valve fitting section is provided on the connecting walls of the body by press working including a non-uniform cross section process producing plastic flow of material.

Rocker arm and method of fabricating rocker arm body

A rocker arm comprises: a rocker arm body having a pair of side walls, a pivot shaft mounting portion at one end, and a valve engaging portion at the other end; and a roller rotatably mounted on the rocker arm body at the middle. In the rocker arm, at least the side walls are prepared by blanking a plate material, and the pivot shaft mounting portion and the valve engaging portion are connected, as bridges, between the side walls, and a thread hole is formed in the pivot shaft mounting portion in such a manner that its length is larger than the wall thickness of the side walls.

Growing community of inventors

Katsuragi, Japan

Nobutsuna Motohashi