JP2005299764A5 - - Google Patents

Claims (6)

An outer member integrally having a vehicle body mounting flange for mounting to a suspension device on the outer periphery, and a double row outer rolling surface formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end and having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and at least one press-fitted into the small-diameter step portion of the hub ring An inner member formed of two inner rings and having an inner rolling surface facing the outer rolling surface of the double row on the outer periphery;
A double row rolling element housed in a freely rolling manner between the rolling surfaces of the outer member and the inner member;
An encoder externally fitted to the inner ring, and an annular sensor holder attached to an end of the outer member so as to face the encoder;
In the wheel bearing device with a rotational speed detection device, which is integrally molded with the sensor holder and includes a rotational speed sensor facing the encoder via a predetermined radial clearance,
The encoder has an annular shape, and the characteristic in the circumferential direction changes alternately and at equal intervals, and a seal is disposed on the inboard side of the encoder. And a bearing device for a wheel with a rotational speed detecting device, comprising annular first and second sealing plates that are respectively attached to the inner ring and disposed opposite to each other.   The sensor holder includes a steel-made fitting ring and a holding part integrally molded with the fitting ring, and the fitting ring is press-fitted into the outer periphery of the outer member. And a flange that extends radially inward from the fitting portion and is in close contact with the end surface of the outer member, and a cylindrical portion that extends in the axial direction from the flange, and the cylindrical portion includes the first portion The wheel bearing device with a rotational speed detection device according to claim 1, wherein a seal plate is fitted therein.   The second seal plate is externally fitted to the inner ring, and a cylindrical portion in which the encoder is integrally provided on an outer peripheral surface thereof, a cylindrical large diameter step portion extending in the axial direction from the cylindrical portion, The rotational speed according to claim 1 or 2, wherein a labyrinth seal is formed at a distal end portion of the standing plate portion, which is formed in a substantially L-shaped section having a standing plate portion extending radially outward from the radial step portion. Wheel bearing device with detection device.   A labyrinth seal is constructed by arranging a shield having a substantially U-shaped cross section on the inboard side of the seal and making the shield face the shoulder of the outer joint member through a slight radial clearance. The wheel bearing apparatus with a rotational speed detection apparatus in any one of 1 thru | or 3.   The shield includes a first cylindrical portion fitted in the sensor holder, a standing plate portion extending radially inward from the first cylindrical portion, and a second cylindrical portion extending in the axial direction from the standing plate portion. The wheel bearing device with a rotational speed detection device according to claim 4, wherein a labyrinth seal is configured such that the standing plate portion is opposed to the second seal plate via a slight axial clearance.   The shield includes a first cylindrical portion fitted in the sensor holder, a standing plate portion extending radially inward from the first cylindrical portion, and a second cylindrical portion extending in the axial direction from the standing plate portion. The wheel bearing device with a rotational speed detecting device according to claim 4, wherein a labyrinth seal is configured by causing the second cylindrical portion to face the end surface of the inner ring via a slight axial clearance.