Nsk Corporation

Nippon Seiko Kabushiki Kaisha

Uchiyama Kogyo Kabushiki Kaisha

Nissan Motor Company Limited

Nikon Corporation

Hiroya Miyazaki

Hideo Ouchi

Junshi Sakamoto

Yoshihisa Ohnuki

Yuji Nakamura

Hiroyuki Sawai

Takafumi Kuwano

Hayato Ohmi

Shuichi Ishikawa

Masao Yamamoto

Naoki Mitsue

Masahiro Hosoda

Takeyasu Kaneko

Hirohide Ishida

Youji Nakano

Yasunori Kawase

Shigeru Endo

Ikunori Sakatani

Isamu Chikuma

Kouichi Morita

Hirotoshi Aramaki

Yasuhiko Miyaura

Masahito Matsui

Masayuki Tateyama

Shuuichi Ishikawa

Kenichi Nagai

Hiroaki Sasa

Genji Okuma

Yoichi Saito

Sigeru Togo

It is prevented that magnetic foreign matter adheres the magnet encoderto deteriorate the reliability of rotation speed detection with the sensor. The encoderis provided on the outside of the combined seal ringwith reference to the bearing interior space, and the sensorfaces the encoder. The knuckleis placed close to the housingof the drive shaft memberof the constant velocity jointto form a labyrinth seal. The width of the clearance of this labyrinth sealis up to 40% of the pitch of adjacent S-poles and N-poles that are arranged on the detected surface of the encoder. With this construction, larger foreign matter is prevented from attaching to the detected surface of the encoderto solve the above subject.

Rotary support for wheel with encoder

A cylindrical portionis not quenched, and its hardness of a cylindrical portionis set at Hv200 to 300. An average cross sectional area of the crystal particle in this portion is set to be within 0.03 mm. Accordingly, when a caulking portion is formed by expanding the cylindrical portionto an inner ringto a hubmade of carbon steel, cracks or the like are not formed in the resultant caulking portion.

Wheel-support rolling bearing unit and a method manufacturing the same

A bearing unit for a wheel has a rotary ring whose raceway surface is hardened by a thermal process. In this bearing unit, the side surface of a fitting flange for fixedly joining a rotary body for braking and a wheel, is formed by working in a predetermined configuration after the raceway surface of the rotary ring has been subjected to the thermal process. The raceway surface of the rotary ring is worked in a predetermined configuration and dimensions on the basis of the side surface of said fitting flange. This bearing unit can restrain disagreeable noises and vibration from being caused upon braking.

Bearing unit for wheel and manufacturing method thereof

An inner ringis fit to a stepped partformed on the inner end of a hubA desired pre-load is applied to rolling elementsin a state that an outer end faceof the inner ringis butted against a step surfaceformed on the hubThe inner ringis fit to the hubby interference fitting causing a static friction force, which is larger than a thrust load acting on the inner ringbased on the pre-loading. Therefore, the inner end face of the inner ringis clamped with a caulking portion, which is formed by expanding outward in the diameter directions a cylindrical portionformed in the inner end of the hub

Wheel-support rolling bearing unit and method of manufacturing the same

A rotation-speed sensor device is provided to comprise an encoder supported by a rotating race of a rolling bearing unit for vehicle wheel support to be concentric with the rotating race and having a detected portion the characteristics of which are alternately changed in a circumferential direction, a rotation detection sensor supported by a non-rotating member on the vehicle chassis side and having a detecting portion facing the detected portion to produce a detection signal, a wireless transmission device for sending the detection signal from the rotation detection sensor to a controller provided on the vehicle chassis side, and a self-diagnosis circuit to judge whether there is an error or not in the rotation detection sensor.

Rotation-speed sensor device

A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.

Rolling bearing unit for supporting vehicle wheel

An inner ring is fit to a stepped part formed on the inner end of a hub . A desired pre-load is applied to rolling elements in a state that an outer end face of the inner ring is butted against a step surface formed on the hub . The inner ring is fit to the hub by interference fitting causing a static friction force, which is larger than a thrust load acting on the inner ring based on the pre-loading. Therefore, the inner end face of the inner ring is clamped with a caulking portion, which is formed by expanding outward in the diameter directions a cylindrical portion formed in the inner end of the hub

A rolling bearing unit with a rotation speed detection instrument having a hub with a plurality of inner race tracks, an outer race formed of steel material with a plurality of outer race tracks, rolling elements between the tracks, and encoder on the hub and a sensor supported in a mounting hole in the outer race. A hardened layer is formed on the inner surface of the outer race and each portion where the outer race tracks are formed. An area of the inner surface around the mounting hole is not hardened.

Rolling bearing unit with rotation speed detection instrument for use in cars and method for working outer race for use in this bearing unit

A bearing unit for a wheel has a rotary ring whose raceway surface is hardened by a thermal process. In this bearing unit, the side surface of a fitting flange for fixedly joining a rotary body for braking and a wheel, is formed by working in a predetermined configuration after the raceway surface of the rotary ring has been subjected to the thermal process. The raceway surface of the rotary ring is worked in a predetermined configuration and dimensions on the basis of the side surface of the fitting flange. This bearing unit can restrain disagreeable noises and vibration from being caused upon braking.

A cylindrical portion is not quenched, and its hardness of a cylindrical portion is set at Hv to . An average cross sectional area of the crystal particle in this portion is set to be within mm . Accordingly, when a caulking portion is formed by expanding the cylindrical portion 10 to an inner ring to a hub 2 made of carbon steel, cracks or the like are not formed in the resultant caulking portion.

A rolling bearing unit with a rotation speed sensor comprising a stationary member, a rotatable member having a second raceway, a plurality of rolling members rotatably provided between the first raceway and the second raceway, an encoder fixed to the rotatable member and to be concentric with the rotational axis thereof and having a detected portion the characteristics of which are adapted to alternately change, and a sensor fixed to the stationary member to detect changes in the magnetic characteristics of the encoder to produce signals as the rotatable member rotates, and the sensor having a detecting portion which is opposed to the detected portion of the encoder with a clearance therebetween at a circumferential location where the change in the clearance is minimized when subjected to a load from outside.

Growing community of inventors

Fujisawa, Japan

Hiroya Miyazaki