JP2011117583A5 - - Google Patents

Description

In order to achieve such an object, the invention according to claim 1 of the present invention includes an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel for attaching a wheel to one end. A hub ring integrally having a mounting flange and formed with a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring. An inner member in which a double row of inner rolling surfaces facing the outer rolling surface is formed, and a double row of rolling members housed between the outer member and the inner member so as to roll freely. It is fitted to the moving body, the pulsar ring that is externally fitted to the inner ring, the characteristics are alternately changed at equal intervals in the circumferential direction, and the inner side end of the outer member. the formed cup-shaped sensor cap, and loaded times in the sensor cap In the wheel bearing device with a rotational speed detection device, the rotational member is opposed to the pulsar ring via a predetermined axial air gap, and a cup-shaped cap is attached to the outer member. A cylindrical fitting portion in which the cap is formed by pressing from a non-magnetic steel plate, and an elastic member made of synthetic rubber is provided on the outer peripheral surface that is press-fitted into the inner periphery of the inner side end of the outer member. And a disc portion extending radially inward from the fitting portion and facing the pulsar ring via a slight axial clearance, and the rotational speed sensor is abutted or brought close to the disc portion. The pulsar ring is disposed so as to face the cap.

In this way, it is externally fitted to the inner ring and is fitted to the inner side end of the outer member and the pulsar ring whose characteristics are alternately changed at equal intervals in the circumferential direction, and is formed by pressing from a steel plate cup-shaped sensor cap, and a rotation speed sensor attached to the sensor cap, the rotation speed detector equipped wheel the rotational speed sensor is opposed via a predetermined axial air gap pulser ring In a bearing device, a cup-shaped cap is attached to the outer member, and this cap is formed by pressing from a non-magnetic steel plate and is synthesized with the outer peripheral surface that is press-fitted into the inner periphery of the inner side end of the outer member. A cylindrical fitting part provided with an elastic member made of rubber, and a disk part extending radially inward from the fitting part and facing the pulsar ring through a slight axial clearance At the same time, a rotational speed sensor is abutted or brought close to this disc part, and is arranged opposite to the pulsar ring via the cap, so that it is possible to improve the assembly workability by eliminating complicated air gap adjustment and fitting. The inside of the bearing can be sealed with a cap in which an elastic member made of synthetic rubber is arranged at the portion, and a wheel bearing device with a rotation speed detecting device that can improve the sealing performance can be provided.

The wheel bearing device with a rotational speed detection device according to the present invention is integrally formed with an outer member in which a double row outer rolling surface is integrally formed on the inner periphery and a wheel mounting flange for mounting a wheel on one end. And a hub ring formed with a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring. An inner member in which opposing double-row inner rolling surfaces are formed, a double-row rolling element housed in a freely rolling manner between the respective rolling surfaces of the outer member and the inner member, and the inner ring A pulsar ring that is externally fitted to the circumferential direction and has characteristics changed alternately and at equal intervals, and a cup shape that is fitted to the inner side end of the outer member and formed from a steel plate by pressing. the sensor cap, and the rotational speed cell mounted on the sensor cap In the wheel bearing device with a rotational speed detection device in which the rotational speed sensor is opposed to the pulsar ring via a predetermined axial air gap, a cup-shaped cap is attached to the outer member, This cap is formed from a non-magnetic steel plate by pressing, and a cylindrical fitting portion provided with an elastic member made of synthetic rubber on the outer peripheral surface press-fitted into the inner periphery of the inner side end of the outer member; And a disc portion extending radially inward from the fitting portion and facing the pulsar ring via a slight axial clearance, and the rotational speed sensor is abutted or approached to the disc portion, Since it is disposed opposite to the pulsar ring via the cap, it is possible to improve the assembly workability by omitting complicated air gap adjustment, and the elastic member made of synthetic rubber in the fitting portion The provided cap it is possible to seal the inside of the bearing, it is possible to provide a rotational speed detector equipped wheel support bearing assembly with improved sealing performance.

Claims (12)

An outer member in which a double row outer rolling surface is integrally formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end, and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring; An inner member in which a double row inner rolling surface facing the outer rolling surface of the double row is formed on the outer periphery,
A double row rolling element accommodated in a freely rolling manner between the rolling surfaces of the outer member and the inner member;
Pulsar ring that is externally fitted to the inner ring, and the characteristics are changed alternately and at equal intervals in the circumferential direction;
Is fitted to the inner side end of the outer member comprises a steel plate cup-shaped sensor cap formed by press working, and a rotational speed sensor attached to the sensor cap,
In the wheel bearing device with a rotational speed detection device, wherein the rotational speed sensor is opposed to the pulsar ring via a predetermined axial air gap,
A cup-shaped cap is attached to the outer member, and the cap is formed by pressing from a non-magnetic steel plate and is made of synthetic rubber on the outer peripheral surface that is press-fitted into the inner periphery of the inner side end of the outer member. The disc includes a cylindrical fitting portion provided with an elastic member, and a disc portion extending radially inward from the fitting portion and facing the pulsar ring via a slight axial clearance. A wheel bearing device with a rotational speed detecting device, wherein the rotational speed sensor is abutted or brought close to a portion and is arranged to face the pulsar ring via the cap.   A reduced diameter portion is formed between the fitting portion of the cap and the disc portion, and an elastic member made of synthetic rubber is integrally joined to the reduced diameter portion by vulcanization adhesion. 2. An annular projection that protrudes inward from the side surface of the disc portion and is joined so as not to interfere with the rotational speed sensor, and includes an annular protrusion that protrudes radially outward from the outer diameter of the fitting portion. Wheel bearing device with a rotation speed detection device.   The wheel bearing device with a rotation speed detecting device according to claim 1 or 2, wherein at least a disk portion of the cap is formed to have a wall thickness thinner than that of other portions.   The wheel bearing device with a rotational speed detecting device according to claim 1, wherein a fitting surface on an inner periphery of an end portion of the outer member is restricted to a chatter height of 3 µm or less.   The sensor cap includes a cylindrical fitting portion that is fitted to an end portion of the outer member, and a bottom portion that extends radially inward from the fitting portion, and a fitting insertion hole is formed on the road surface at the bottom portion. The wheel bearing device with a rotation speed detection device according to claim 1, wherein the wheel bearing device is formed in a horizontal position and mounted with the rotation speed sensor.   The fitting portion of the sensor cap is press-fitted into the outer periphery of the end portion of the outer member, and an annular groove is formed in the outer periphery of the end portion of the outer member, and the end portion of the fitting portion is added to the annular groove. The wheel bearing device with a rotational speed detection device according to claim 5, wherein the wheel bearing device is tightened.   The wheel bearing device with a rotational speed detection device according to claim 5 or 6, wherein a drain is formed on a side close to a road surface at a fitting portion and a bottom corner portion of the sensor cap.   A perforation is formed at or around the center of the bottom of the sensor cap, and a fixing nut is press-fitted into the bearing inward of the bottom, and a fixing bolt is fastened to the fixing nut via a mounting member. The wheel bearing device with a rotation speed detection device according to any one of claims 5 to 7, wherein a rotation speed sensor is fixed.   The wheel bearing device with a rotational speed detection device according to any one of claims 1 to 3, wherein the cap is formed of a non-magnetic austenitic stainless steel plate.   The wheel bearing device with a rotation speed detection device according to any one of claims 5 to 8, wherein the sensor cap is formed of a stainless steel plate.   The wheel bearing device with a rotational speed detection device according to any one of claims 5 to 8, wherein the sensor cap is formed of a steel plate subjected to cationic electrodeposition coating or rust prevention treatment.   The pitch circle diameter of the outer rolling element row of the double row rolling element rows is set larger than the pitch circle diameter of the inner rolling element row, and the rolling element diameter of the outer rolling element row is set. Is set to be smaller than the rolling element diameter of the inner side rolling element row, and the number of rolling elements of the outer side rolling element row is set to be larger than the number of rolling elements of the inner side rolling element row. A wheel bearing device with a rotational speed detection device according to claim 1.