Nsk Corporation

Other

Nikon Corporation

Shindengen Electric Manufacturing Company Limited

Nippon Seiko Kabushiki Kaisha

Junshi Sakamoto

Hiroya Miyazaki

Kouichi Morita

Hayato Ohmi

Hideo Ouchi

Yuji Nakamura

Takamichi Okada

Masao Yamamoto

Naoki Mitsue

Yoshihisa Ohnuki

Akihiro Mashio

Shigeru Endo

Ikunori Sakatani

Toshiaki Maeda

Shuichi Ishikawa

Hirohide Ishida

Shuuichi Ishikawa

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 sensor for detecting a speed of rotation is an active sensor, a sensing portionof the sensor directly faces the magnetic encoderwithout interposition between it and the encoder, and a harness(or connector) of the sensorfor detecting the speed of rotation is taken out of a gap between a knuckle N and a constant velocity universal joint

Hub unit for driving wheel

Attachment holes are formed in a plurality of locations in the circumferential direction of the attachment flange of a wheel bearing unit. The amount 'h' of projection from an attachment surface in the axial direction of the opening edge peripheral portion of the respective attachment holes is limited under the condition that studs are press-fitted and fixed into the respective attachment holes.

Method for forming a wheel bearing unit

The rotor of a braking apparatus is fitted onto a cylindrical positioning portion, and in this condition, fixed to the hubusing bolts which are threaded into the screw holesin the rotating flange, and tightened. As the hubrotates, the runout in the radial direction of the outer peripheral surfaceof the cylindrical positioning portionis controlled up to 15 &#x3bc;m, to suppress the runout of the vehicle wheel. With this construction, running performance such as riding comfort and diving stability is improved.

Vehicle bearing wheel unit

In a wheel supporting rolling bearing unit, both end openings of a space in which ballsare provided are sealed with seal ringseach having two to three seal lips. A rolling resistance that changes based on a preload is regulated in a range of 0.15 to 0.45 N&#xb7;m, and a total running resistance of both seal ringsbased on a friction between the seal lips and counter surfaces is regulated in a range of 0.06 to 0.4 N&#xb7;m.

Wheel supporting rolling bearing unit

Respective constituent members of a wheel bearing unitare assembled and also a coveris fixed to an inner end portion of an outer ring. The wheel bearing unitis fitted to a turning machinein a state that a space in which an encoderis provided is sealed tightly from an outside by fitting a stop pluginto an insertion holeprovided in the cover. A top end portion of a rotating shaftof a turning machineis engaged with an engaged concave portionprovided to a hub. A turning process is applied to an outer side surface of a rotary flangewhile turning the hubaround the outer ringby the rotating shaft, and thus the outer side surface is processed in predetermined shape and dimension.

Bearing unit for wheel and method of manufacturing the bearing unit

In a wheel supporting rolling bearing unit, an inner end opening out of both end openings of a space in which ballsare provided is sealed with a cap. An outer end opening is sealed with a seal ringhaving three seal lips. A rolling resistance that changes based on a preload is regulated in a range of 0.15 to 0.45 N&#xb7;m, and a running resistance of the seal ringbased on a friction between the seal ring and a counter surface is regulated in a range of 0.03 to 0.2 N&#xb7;m.

The outer raceis fixed to the support holein the knuckle, and the constant velocity jointis connected to the hub. The first seal ringis fitted into the outer raceto cover the opening on the end of the bearing space. The seal ringis fitted into the support holeto cover the opening on the end of the detection space. The encoderis fitted onto the inner race, and the outer peripheral edge of the encoderfaces the inner peripheral surface on the outer racein an adjacent arrangement relationship to form a labyrinth clearance, so that grease within the bearing spaceis prevented from leaking toward the detection space, whereby the rotation resistance is small to improve parts of the automobile in acceleration and fuel consumption.

Rotation-support apparatus with rotation sensor device for drive-wheel

Rotation torque of the hub rotating together with the road wheel is reduced to improve the driving performance of the vehicle such as acceleration performance, fuel consumption. The opening at both ends of the space where ballsare provided is covered by seal ringseach having two or three seal lips. The whole rotation torque of the both seal ringsbased on the friction between the seal lips and the mating surface is reglated between 0.06 N&#xb7;m and 0.4 N&#xb7;m.

Rolling bearing unit for supporting wheel

A cylindrical linermade from steel is inserted into a knucklemade from a light alloy, when casting the knuckle. Then, an outer ringconstituting a wheel bearing unit is internally secured to the inner diameter side of the liner. The finishing-process of double row outer ring racewaysandformed on the inner peripheral surface of the outer ringmay be performed prior to internally securing the outer ringto the liner. Since it is not necessary to set a knuckle, which is large and complex in shape, into processing equipment to perform finishing-process of the respective outer ring racewaysand, it realizes a structure enabling a reduction in the total weight and the number of assembling steps, of the knuckle and the wheel bearing unit, thereby reducing the total manufacturing cost.

Wheel rotation supporting apparatus

An inner diameter-side cylindrical memberof a supporting ringis externally fitted on a shoulderof an inner ringconstituting a hub. An encoderis supported on the outer peripheral surface of an outer diameter-side cylindrical portionconstituting the supporting ring. Further, to a metal coreinternally fitted to an outer ringis supported and fixed a rotation-detecting sensor, and also a proximal end portion of a seal memberis connected and fixed thereto. An edge of at least one of seal lipsof the seal memberis brought to be in sliding contact with the supporting ringaround the entire circumference. Since the rotation-detecting sensorand the seal memberare supported by the core metal, a rolling bearing unit can be downsized. Further, since the encoderis placed on the outer peripheral surface of the outer diameter-side cylindrical portion, the width dimension of a surface with which the edge of each of the seal lipsis brought to be in sliding contact is secured for excellent sealing ability. The structure provides a rolling bearing unit with a rotating speed-detecting device, where the bearing unit is downsized and has a construction capable of achieving excellent sealing ability.

Rolling bearing unit with rotational speed detecting device

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 rolling bearing unit has a rotational speed detection device which is comprised of a sensor having a yoke, a pair of permanent magnets and coil, and a tone wheal which is made by press-forming a magnetic metal plate so as to comprise a cylindrical support base secured onto an end portion of the bearing unit, a ring-shaped first detecting part which is bent radially outward from the inner rim of the cylindrical support base, and a cylindrical shaped second detecting part which extends axially from the outer peripheral rim of the first detecting part the first and second detecting parts having a ferro-magnetic first portion and a non-magnetic second portion, and the yoke having opposite ends to be faced to the first and second portions, and the permanent magnets being faced to each other so that magnetic fluxes flow alternatively through the yoke corresponding the rotation of the tone wheel.

Rolling bearing unit with rotational speed detection device having a tone wheel and a sensor

A rolling bearing unit with rotating speed detector comprises a stationary outer ring member, a rotating inner ring assembly, a rolling elements between the outer ring member and inner ring assembly, a sensor mounted to the outer ring member and a tone wheel mounted to the inner ring assembly and having a cylindrical portion faced to the sensor, such that the portion is formed with an outward facing flange to which a jig can be applied.

Rolling bearing unit with rotating speed detector

A rolling bearing unit with rotating speed sensor comprising a stationary outer ring member having an outer ring raceway on an inner peripheral face thereof, a rotatable inner ring member having an inner ring raceway on an outer peripheral face thereof, a plurality of rolling elements provided between the outer ring raceway and the inner ring raceway, an annular tone wheel secured to the end portion of the inner ring member and having a cylindrical peripheral portion formed with rotating cutouts circumferentially with a uniform space therebetween, a cover comprising a synthetic resin block and a metal portion and having a cylindrical engaging portion fixed to the open end portion of the outer ring member by engaging the engaging portion with the inner peripheral face of the outer ring member, an annular sensor embedded in the resin block having a peripheral face such that the peripheral face thereof opposes partly the peripheral portion of the tone wheel, and a guide formed on at least one of the tone wheel and the sensor to make the tone wheel and sensor overlapped radially with each other.

Growing community of inventors

Fujisawa, Japan

Junshi Sakamoto