Ntn Corporation

Mitsubishi Rayon Company, Limited

Asahi Glass Matex Co., Ltd.

Arito Matsui

Tatsuo Nakajima

Kouya Oohira

Kazutoyo Murakami

Keisuke Sone

Tsuneo Takano

Hirokazu Ooba

Hajime Asai

Takashi Nishimoto

Hiroki Mukai

Go Itohiya

A link actuating device includes input side and output side link hubs, and two sets of link mechanisms. Each of the link mechanisms is a three-link-chain link mechanism including four revolute pairs, and includes input side and output side end links rotatably connected to the input side and output side link hubs and an intermediate links rotatably connected to input side and output side end links. The link mechanism have a positional relationship in which the revolute pair axes between the link hubs and the end links are located on the same plane and cross each other. At least one of the two sets of link mechanisms is provided with interlocking unit that interlocks the input side end link and the output side end link to each other so as to be rotationally displaced.

Link actuating device

The magnetic encoder () includes a slinger () fixed to a rotation-side raceway ring of a bearing and including an outer side surface () opposed to the side of a sensor to detect rotation speed of the rotation-side raceway ring and having a surface roughness Ra: 0.3 to 3.0 &#x3bc;m, and an inner side surface () opposed to the side of a sealing member () to seal the bearing; a multipolar magnet () bonded to the outer side surface () through an adhesive; and a film () formed on the inner side surface (), having a surface roughness Ra of 0.3 &#x3bc;m or less, and being in sliding contact with the sealing member ().

Magnetic encoder and rolling bearing

A fiber reinforced plastic pipe is provided to prevent it from being damaged and make full use of its practical performance when the fiber reinforced plastic pipe, reduced in thickness and increased in diameter by pultrusion process, is reduced in the circumferential direction and inserted into a metal pipe. The fiber reinforced plastic pipe, reduced in thickness and increased in diameter by pultrusion process, includes a fiber bundle spun and aligned in the longitudinal direction, and circumferential reinforced fiber sheet provided at least on one of the outer and inner surface layers. The circumferential reinforced fiber sheet is inserted into the metal pipe to form a power transmission shaft such as an intermediate shaft for use with a propeller shaft or a drive shaft.

Fiber reinforced plastic pipe and power transmission shaft employing the same

A magnetic encoder includes a multipolar magnet, having magnetic poles formed therein so as to alternate with each other in a direction circumferentially thereof, and a core metal supporting the multipolar magnet. The multipolar magnet is prepared from a sintered element formed by sintering a powdery mixture of a magnetic powder and a non-magnetic metallic powder. This multipolar magnet is fixed to the core metal to form a unitary component made up of the sintered element and the core metal. The unitary component is subjected to a surface treatment for anticorrosion.

Magnetic encoder and wheel support bearing assembly using the same

To provide a magnetic encoder which can be assembled having a thin-walled structure while securing an excellent detection sensitivity and which can provide an excellent moldability by suitably selecting materials, the magnetic encoder is provided which includes a multi-pole magnethaving a plurality of opposite magnetic poles alternating in a direction circumferentially thereof, and a core metalfor supporting the multi-pole magnet. The multi-pole magnetcontains a powdery magnetic material mixed in an amount within the range of 20 to 90 vol. % relative to the total volume of the multi-pole magnet. The multi-pole magnetmay be a sintered magnet.

To substantially eliminate deficiencies such as portions of the resinous coating, where the film thickness is reduced considerably during the press-fitting, and to aim at providing a high productivity with a reduced cost and without the possibility of occurrence of rusting after a prolonged time of use under severe environmental conditions due to an excellent anticorrosive property, a magnetic encoder () includes a multipolar magnet () having a plurality of alternating magnetic poles alternating with each other in a direction circumferentially thereof, and a core metal () supporting the multipolar magnet (). The multipolar magnet () is formed of a sintered element prepared by mixing and sintering a powdery mixture of a magnetic powder and a non-magnetic metallic powder. The multipolar magnet () is fixed on the core metal () by staking a portion of the core metal (), and a sintered element/core metal assembly () fixed on the core metal () is surface treated to have with an anticorrosive resinous coating () for anticorrosive purpose. When the magnetic encoder is press-fitted on an encoder carrier member, one of a press-fitting punch and the magnetic encoder () is heated to a temperature within the range of 60 to 150&#xb0; C.

Magnetic encoder and wheel support bearing assembly utilizing the same

To provide a wheel support bearing assembly capable of securing a satisfactory sealability and of accomplishing an assured press-fit of an magnetic encoder, the wheel support bearing assembly for supporting a vehicle wheel rotatably relative to a vehicle body structure includes an outer member, an inner memberpositioned inside the outer memberwith an annular bearing space delimited between it and the outer member, and rows of rolling elementsrollingly within the annular bearing space. At least one sealing unitis provided for sealing one of opposite open ends of the annular bearing space. This sealing unitis comprised in part of a magnetic encoderincluding a multi-pole magnet memberhaving a plurality of opposite magnetic poles alternating in a direction circumferentially thereof and a first sealing plateserving as a core metal. The first sealing plateis press-fitted onto the inner memberwith the amount of interference fit to be within the range of 5 to 230 &#x3bc;m.

Growing community of inventors

Iwata, Japan

Arito Matsui