JP2020085010A - Sensor holder for wheel bearing device, and wheel bearing device including the same - Google Patents

Abstract

To provide a sensor holder for a wheel bearing device capable of providing a sensor holder on an outer ring with suppressed expansion of the outer ring and the sensor holder, and a wheel bearing device including the sensor holder.SOLUTION: A sensor holder 12 of a wheel bearing device 1 for sealing an outer ring 2, has a sensor holder fitting part 12d fitted to the outer ring 2 of the wheel bearing device 1 and a mounting part 12h to which a magnetic sensor 15 is attached. The sensor holder fitting part 12d has an O-ring that is an elastic member for sealing a gap with the outer ring 2, and a claw part 12e that engages with the outer ring 2, and the sensor holder fitting part is fitted to the wheel bearing device 1.SELECTED DRAWING: Figure 2

Description

The present invention relates to a sensor holder for a wheel bearing device and a wheel bearing device including the sensor holder.

2. Description of the Related Art Conventionally, in a suspension device for an automobile or the like, a wheel bearing device is known that includes a rotation speed detection device for detecting a rotation speed of a wheel required for control of an ABS (Anti-Lock Breaking System) or the like. A rotation speed detection device for a wheel bearing device includes an encoder ring provided with a magnetic encoder and a magnetic sensor. The encoder ring is fixed by being press-fitted into the inner ring. The magnetic sensor is provided on the outer ring via a bearing cap made of a resin material. For example, it is as described in Patent Document 1.

JP, 2016-38012, A

The bearing cap described in Patent Document 1 has a cylindrical portion in which a metal fitting ring to be fitted inside the axially inner end opening of the outer ring is molded. The outer ring expands in the radial direction by the force applied from the cylindrical portion of the bearing cap that is press-fitted. As a result, in the bearing device for a wheel, the roundness of the raceway surface of the outer ring may be deteriorated and the bearing life may be reduced. Further, the cylindrical portion of the bearing cap is radially compressed by the reaction force applied from the outer ring. As a result, in the bearing device for a wheel, the bottom portion of the resin cap may expand in the axial direction and the magnetic sensor may not be provided in an appropriate state.

The present invention has been made in view of the above circumstances, and a sensor holder for a wheel bearing device capable of suppressing expansion of an outer ring and a sensor holder while ensuring a pull-out resistance and a wheel including the same. An object is to provide a bearing device.

That is, a first aspect of the present invention is a sensor holder for a wheel bearing device, comprising: a fitting part fitted to an outer member of the wheel bearing device; and a mounting part to which a magnetic sensor is mounted. Is a sensor holder for a wheel bearing device, in which a claw portion fitted to the outer member and an elastic member that seals a gap between the fitting portion and the outer member are provided.

A second invention is a sensor holder for a wheel bearing device, wherein the claw portion has a slit.

A third aspect of the present invention is an outer member having a double row outer raceway surface formed on the inner circumference thereof, a hub wheel having a small diameter step portion extending axially on the outer circumference thereof, and a press fit into the small diameter step portion of the hub wheel. An inner member having at least one inner ring formed on the outer peripheral surfaces of the hub wheel and the inner ring, the inner row raceway surface of the double row facing the outer raceway surface of the double row, and the outer member A double row rolling element housed between both raceway surfaces of a member and the inner member so as to be rollable, and a magnetic encoder in which magnetism alternately changes at equal intervals in the circumferential direction, A wheel bearing having an encoder ring press-fitted to the inner end and a sensor holder for a wheel bearing device fitted to the outer member and having the magnetic sensor attached to the mounting portion. A device for a wheel, wherein a groove is formed in the outer member, and the claw of the sensor holder is fitted in the groove.

The effects of the present invention are as follows.

That is, in the first aspect of the present invention, since the claw portion formed on the sensor holder is fitted to the wheel bearing device, there is no need to press fit the fitting portion of the sensor holder to the wheel bearing device. Thereby, expansion of the outer ring and the sensor holder can be suppressed while ensuring the pull-out resistance.

In the second aspect of the invention, since the pawl portion is easily elastically deformed, even if the sensor holder is formed with the annular pawl portion or a plurality of pawl portions, the pawl portion is reliably fitted to the wheel bearing device. Thereby, expansion of the outer ring and the sensor holder can be suppressed while ensuring the pull-out resistance.

In the third aspect of the invention, since the claw portion of the sensor holder is fitted in the groove portion of the outer ring, it is not necessary to press-fit the fitting portion of the sensor holder into the fitting portion of the outer ring. Thereby, expansion of the outer ring and the sensor holder can be suppressed while ensuring the pull-out resistance.

Sectional drawing which shows the whole structure of the bearing device for wheels. FIG. 3 is an enlarged partial cross-sectional view showing a state where the sensor holder is not fitted in the first embodiment of the wheel bearing device. FIG. 3 is an enlarged partial cross-sectional view showing a state in which the sensor holder is fitted in the first embodiment of the wheel bearing device. FIG. 4 shows a sensor holder. (A) shows the perspective view of the sensor holder provided with the slit, (B) shows the plan view of the axial direction of the sensor holder provided with the slit. FIG. 5 shows a second embodiment of the wheel bearing device. (A) is an enlarged partial sectional view showing a state where the sensor holder is not fitted, and (B) is an end view taken along the arrow A in (A). FIG. 6 shows a third embodiment of the wheel bearing device. 5A is an end view taken along the arrow A in FIG. 5A, showing a state in which the engaging portion of the outer member and the engaging portion of the sensor holder are engaged, and FIG. The state where the engaging portion of the holder is moving on the guide surface of the outer member is shown, and (C) is the state in which the engaging portion of the sensor holder and the engaging portion of the outer member are released. Indicates. The expanded partial sectional view which shows the state in which the sensor holder was fitted in other embodiment of the bearing device for wheels.

A wheel bearing device 1 that is a first embodiment of a wheel bearing device according to the present invention will be described with reference to FIG.

As shown in FIG. 1, a wheel bearing device 1 rotatably supports a wheel in a suspension device of a vehicle such as an automobile. The wheel bearing device 1 includes an outer ring 2 which is an outer member, a hub wheel 3 which is an inner member, an inner ring 4, two inner row ball rows 5 which are rolling rows, an outer ball row 6 and an encoder ring 9. 1, a sensor holder (also referred to as a sensor cap) 12, an outer seal member 14 that is a seal member, and the like. In the following, the "inner side" represents the vehicle body side of the wheel bearing device 1 when attached to the vehicle body, and the "outer side" the wheel side of the wheel bearing device 1 when attached to the vehicle body. Represents. Further, the axial direction means a direction along the rotation axis of the wheel bearing device 1.

An inner side fitting portion 2a into which the sensor holder 12 can be fitted is formed on the inner peripheral surface of the inner side opening of the outer ring 2. An outer side fitting portion 2b into which the outer side sealing member 14 can be fitted is formed in the outer side opening of the outer ring 2. On the inner peripheral surface of the outer ring 2, an outer raceway surface 2c on the inner side and an outer raceway surface 2d on the outer side are formed in a ring shape. On the outer peripheral surface of the outer ring 2, a vehicle body mounting flange 2e for mounting on a vehicle body side member (knuckle) not shown is integrally formed.

A small-diameter step portion 3a having a diameter smaller than that of the outer end portion is formed on the outer peripheral surface of the inner end portion of the hub wheel 3. A wheel mounting flange 3b for mounting a wheel is integrally formed on an outer end of the hub wheel 3. The wheel mounting flange 3b is provided with a plurality of hub bolts 3e at equidistant positions on the circumference. Further, the hub wheel 3 is provided with an inner raceway surface 3c on the outer side so as to face the outer raceway surface 2d on the outer side of the outer race 2. Further, the hub wheel 3 is formed with a lip sliding surface 3d of the outer seal member 14 on the base side of the wheel mounting flange 3b. An inner ring 4 is provided on the small-diameter step portion 3 a of the hub wheel 3.

The inner ring 4 is a rolling row and applies a preload to the inner ball row 5 arranged on the vehicle body side when mounted on the vehicle and the outer ball row 6 arranged on the wheel side when mounted on the vehicle. On the outer peripheral surface of the inner ring 4, an annular inner raceway surface 4a is formed in the circumferential direction. The inner ring 4 is fixed to the small-diameter step portion 3a of the hub wheel 3 by press fitting and caulking. That is, on the inner side of the hub wheel 3, the inner race 4 constitutes the inner raceway surface 4 a. The inner raceway surface 4 a of the inner ring 4 faces the inner raceway surface 2 c of the outer ring 2.

In the inner side ball row 5 and the outer side ball row 6 which are rolling rows, a plurality of balls 8 which are rolling elements are annularly held by a cage 7. The inner ball row 5 is rotatably sandwiched between the inner raceway surface 4a of the inner race 4 and the outer raceway surface 2c of the outer race 2 on the inner side. The outer ball row 6 is rotatably sandwiched between the inner raceway surface 3c of the hub wheel 3 and the outer raceway surface 2d of the outer ring 2 on the outer side.

The wheel bearing device 1 is composed of a double-row angular contact ball bearing including an outer ring 2, a hub wheel 3 and an inner ring 4, an inner ball row 5, and an outer ball row 6. In the present embodiment, the wheel bearing device 1 is not limited to the double-row angular contact ball bearing, and may be configured by a double-row tapered roller bearing.

The encoder ring 9 is a part of a rotation speed detection device that detects the rotation speeds of the hub wheel 3 and the inner ring 4 that are members on the rotation side. The encoder ring 9 includes a support ring 10 and a magnetic encoder 11.

The support ring 10 is a support member that fixes the magnetic encoder 11 to the inner ring 4. The support ring 10 is formed by bending an outer edge portion and an inner edge portion of an annular steel plate by press working, and is formed into a substantially L shape in a cross-sectional view in the axial direction. The support ring 10 is made of a ferromagnetic steel plate, for example, a ferritic stainless steel plate (JIS standard SUS430 series) or a rust-prevented cold steel in order to improve rust prevention and stability of detection accuracy. It is formed by pressing from a rolled steel plate (JIS standard SPCC system or the like). The inner ring 4 is press-fitted into the support ring 10 from the outer side end.

The magnetic encoder 11 is made of synthetic rubber in which a magnetic powder such as ferrite is mixed, and is formed into an annular shape. The magnetic poles N and S are magnetized at equal pitches in the circumferential direction. The magnetic encoder 11 is fixed to the inner side surface of the support ring 10 by vulcanization adhesion or the like. That is, the magnetic encoder 11 is configured to rotate integrally with the inner ring 4 into which the support ring 10 is press fitted.

The sensor holder 12 is a cap that holds the magnetic sensor 15 and seals the inner opening of the outer ring 2. The sensor holder 12 is fixed to the inner fitting portion 2 a of the outer ring 2.

The sensor holder 12 is made of resin. The sensor holder 12 has a bottomed cylindrical shape as a whole, and includes a cylindrical cylindrical portion 12a and a bottom plate portion 12b that closes an opening of the cylindrical portion 12a. A step portion 12c and a sensor holder fitting portion 12d are formed on the cylindrical portion 12a of the sensor holder 12.

The sensor holder fitting portion 12d is provided with an O-ring 13 which is an elastic member. The sensor holder fitting portion 12d is fitted to the inner fitting portion 2a of the outer ring 2 via the O-ring 13. In other words, the O-ring 13 is sandwiched between the sensor holder fitting portion 12d and the inner side fitting portion 2a. As a result, the sensor holder 12 seals the inner opening of the outer ring 2 by the O-ring 13 that acts as a seal member, preventing leakage of the lubricating grease and the ingress of rainwater or dust from the outside. Further, an annular claw portion 12e (see FIG. 2) is formed over the entire circumference at the tip portion (outer side end portion) of the sensor holder fitting portion 12d. An O-ring 13 is provided between the claw portion 12e and the step portion 12c.

A mounting portion 12h to which the magnetic sensor 15 is mounted is formed on the bottom plate portion 12b of the sensor holder 12. The mounting portion 12h is formed so as to project inward in the axial direction in a region that extends radially outward from the central portion of the sensor holder 12. An insertion hole 12i penetrating the mounting portion 12h in the axial direction is formed in a portion of the mounting portion 12h that faces the magnetic encoder 11. The magnetic sensor 15 is inserted into the insertion hole 12i.

The cored bar 12j is a member that reinforces the sensor holder 12. The core metal 12j is, for example, a ferritic stainless steel plate (JIS standard SUS430 series or the like), an austenitic stainless steel plate (JIS standard SUS304 series or the like), or a rust-proof cold-rolled steel plate (JIS standard SPCC system or the like). ). The core metal 12j is formed by pressing a steel plate into an annular shape having an L-shaped cross section. The core metal 12j is molded inside the sensor holder fitting portion 12d to reinforce the sensor holder fitting portion 12d. Since the core metal 12j improves the rigidity of the sensor holder fitting portion 12d in the radial direction, the fitting between the outer ring 2 and the claw portion 12e becomes difficult to be released.

The outer seal member 14 that is a sealing member is a seal member that mainly closes the gap between the outer ring 2 and the hub ring 3. The outer seal member 14 has a cylindrical portion fitted to the outer fitting portion 2b of the outer ring 2, and a plurality of seal lips come into contact with or come close to the lip sliding surface 3d of the hub wheel 3 through an oil film to form a hub. It is configured to be slidable with respect to the wheel 3.

The magnetic sensor 15 detects the passage time of each magnetism of the encoder ring 9 which rotates integrally with the hub wheel 3 and alternately passes through the detection surface. As a result, the wheel bearing device 1 includes a rotation speed detection device including the encoder ring 9 and the magnetic sensor 15. In addition, in the present embodiment, the rotation speed detection device may have a configuration other than using a detected part other than the magnetic encoder 11.

The groove 2f of the outer ring 2 and the claw 12e of the sensor holder 12 in the bearing device 1 for a wheel, and their fitting will be described in detail below with reference to FIGS. 2 and 3. The sensor holder fitting portion 12d is formed with an outer diameter that does not spread the outer ring 2 when fitted to the inner side fitting portion 2a of the outer ring 2. That is, the sensor holder 12 has almost no pull-out strength enough to be held by the outer ring 2.

As shown in FIG. 2, an annular groove portion 2f is formed over the entire circumference on the fitting surface of the inner fitting portion 2a of the outer ring 2 (the inner peripheral surface of the inner opening). The groove 2f is formed in a position, width, depth, and shape that allows the opening of the outer ring 2 to be sealed by the sensor holder 12 by fitting the annular claw 12e (thin ink portion) of the sensor holder 12 together. ..

An annular claw portion 12e is formed on the sensor holder fitting portion 12d over the entire circumference. The claw portion 12e is an outer end portion of the sensor holder fitting portion 12d, and is formed at a position that does not overlap the cored bar 12j (see FIG. 1) when viewed in the radial direction. The claw portion 12e projects outward in the radial direction of the sensor holder fitting portion 12d. A tapered surface 12f is formed on the outer side of the claw portion 12e, and the tapered surface 12f functions as a guide surface for guiding the claw portion 12e to the inner side fitting portion 2a of the outer ring 2. On the inner side of the claw portion 12e, an engagement surface 12g (burr shape) perpendicular to the axial direction is formed, and has a function of being caught by the side surface of the annular groove portion 2f of the outer ring 2. The sensor holder 12 is inserted into the inner fitting portion 2a of the outer ring 2 from the sensor holder fitting portion 12d side (see the white arrow).

As shown in FIG. 3, in the sensor holder 12, the annular claw portion 12e (thin ink portion) is in the annular groove portion 2f of the outer ring 2 in a state where the step portion 12c of the sensor holder 12 is in contact with the inner side end of the outer ring 2. It is fitted. As a result, the movement of the sensor holder 12 toward the outer side in the axial direction is limited by the contact between the inner side end of the outer ring 2 and the step portion 12c, and the movement toward the inner side in the axial direction is engaged by the groove portion 2f and the claw portion 12e. Limited by engagement with surface 12g. Further, in the sensor holder 12, an O-ring 13 closes a gap between the inner side fitting portion 2a and the sensor holder fitting portion 12d. That is, the sensor holder 12 is held by the outer ring 2 even if the pull-out resistance due to the press-fitting is not generated, and seals the inner opening of the outer ring 2.

In the wheel bearing device 1 including the sensor holder 12 configured in this manner, the claw portions 12e of the sensor holder 12 are fitted into the groove portions 2f of the outer ring 2, so that slipping resistance is generated by engagement. Therefore, in the wheel bearing device 1, since it is not necessary to press-fit the sensor holder fitting portion 12d into the inner fitting portion 2a of the outer ring 2, the force on the radially outer side of the outer ring 2 and the sensor holder 12 can be increased. The inner force in the radial direction is not generated. As a result, the wheel bearing device 1 can suppress radial expansion of the outer ring 2 and axial expansion of the bottom surface of the sensor holder 12 due to a radially inward force, while ensuring drop-out resistance.

As shown in FIG. 4A, the claw portion 12e may be provided with radial slits 12k at arbitrary intervals. The claw portion 12e is divided by the slit 12k into a plurality of arcs having an arbitrary length. The slit 12k is formed with a predetermined width so as to be cut out in the axial direction from the tip of the claw portion 12e to the sensor holder fitting portion 12d. The claw portion 12e is easily elastically deformed in the radial direction by being divided by the slit 12k. Further, the claw portion 12e can adjust the magnitude of the external force necessary for the elastic deformation in the radial direction by the axial depth of the slit 12k.

As shown in FIG. 4B, when inserting the sensor holder fitting portion 12d into the inner fitting portion 2a of the outer ring 2, the annular claw portion 12e has an outer diameter larger than the inner diameter of the inner fitting portion 2a. Since it is formed to have the diameter D1, it is pressed inward in the radial direction by the inner fitting portion 2a. When the claw portion 12e is pressed inward in the radial direction, the claw portion 12e is reduced to the outer diameter D2 which is the same as the inner diameter of the inner fitting portion 2a (see the chain double-dashed line diagram). Since the reduction of the outer diameter is absorbed in the circumferential direction by the slit 12k, the claw portion 12e is easily elastically deformed inward in the radial direction. With this configuration, the wheel bearing device 1 can be easily fitted to the inner fitting portion 2a even if the sensor holder 12 is provided with the claw portion 12e.

Next, with reference to FIG. 5, a groove portion 2g having a predetermined length of the outer ring 2 and a claw portion 12m having a predetermined length of the sensor holder 12 in the second embodiment of the wheel bearing device 1 according to the invention, and fitting thereof. The match will be described in detail. The wheel bearing device 1 according to each of the following embodiments is used in place of the wheel bearing device 1 in the wheel bearing device 1 shown in FIG. , Reference numerals are used to indicate the same things, and in the following embodiments, a detailed description of the same points as those of the embodiments already described will be omitted, and different points will be mainly described.

As shown in FIGS. 5A and 5B, the inner fitting portion 2a of the outer ring 2 is formed with a plurality of groove portions 2g having a predetermined length. The plurality of groove portions 2g having a predetermined length are formed as recesses having a predetermined length in the circumferential direction on the fitting surface of the inner fitting portion 2a. The plurality of groove portions 2g having a predetermined length are fitted with the claw portions 12m having a predetermined length of the sensor holder 12, so that the sensor holder 12 can seal the opening of the outer ring 2 at a position, width, depth, and length. And formed into a shape.

A plurality of claw portions 12m having a predetermined length are formed on the sensor holder fitting portion 12d. The claw portion 12m having a predetermined length protrudes outward in the radial direction of the sensor holder fitting portion 12d as a convex portion having a predetermined length in the circumferential direction. The claw portion 12m having a predetermined length is formed to have substantially the same circumferential length as the groove portion 2g having a predetermined length of the outer ring 2. The plurality of claw portions 12m having a predetermined length are fitted into the groove portions 2g having a predetermined length so that the circumferential side surfaces of the claw portions 12m having the predetermined length come into contact with the circumferential side surfaces of the groove portions 2g having a predetermined length. (See FIG. 5B). That is, the sensor holder 12 is restricted from moving in the axial direction and rotating about the axis by the engagement of the groove portion 2g having a predetermined length and the claw portion 12m having a predetermined length.

In the wheel bearing device 1 including the sensor holder 12 configured in this way, the claw portion 12m of the predetermined length of the sensor holder 12 is fitted into the groove portion 2g of the predetermined length of the outer ring 2 so that the axial direction by the engagement. The pull-out resistance and the resistance to rotation around the axis are generated. Therefore, in the wheel bearing device 1, since it is not necessary to press-fit the sensor holder fitting portion 12d into the inner fitting portion 2a of the outer ring 2, the force on the radially outer side of the outer ring 2 and the sensor holder 12 can be increased. The inner force in the radial direction is not generated. As a result, the wheel bearing device 1 can suppress radial expansion of the outer ring 2 and axial expansion of the sensor holder 12 while ensuring pullout resistance.

Next, referring to FIGS. 5A and 6, a groove portion 2h having a predetermined length of the outer ring 2 and a claw having a predetermined length of the sensor holder 12 in the third embodiment of the wheel bearing device 1 according to the present invention. The parts 12m and their engagement will be described in detail.

As shown in FIG. 5A, the inner fitting portion 2a of the outer ring 2 is formed with a plurality of grooves 2h having a predetermined length. As shown in FIG. 6A, on the circumferential side of the groove portion 2h having the predetermined length, a tapered surface or a curved surface extending from the bottom surface of the groove portion 2h having the predetermined length toward the fitting surface of the inner fitting portion 2a. A guide surface 2i made of the same material is formed.

As shown in FIG. 6(B), when the sensor holder 12 is rotated around the axis (see the white arrow), the claw portion 12m (thin ink) having a predetermined length engaged with the groove portion 2h having a predetermined length. (Part) comes into contact with the guide surface 2i and is pressed inward in the radial direction (see the black arrow). The claw portion 12m having a predetermined length is moved in the circumferential direction along the guide surface 2i while being elastically deformed radially inward by the guide surface 2i.

As shown in FIG. 6C, the claw portion 12m having a predetermined length is guided to the fitting surface of the inner fitting portion 2a while being elastically deformed radially inward by the guide surface 2i. That is, the claw portion 12m having the predetermined length is not fitted in the groove portion 2h having the predetermined length. In this way, the sensor holder 12 is rotated about the axis, so that the claw portion 12m having a predetermined length is pushed out of the groove portion 2h having a predetermined length and the engagement is released. The sensor holder 12 can be removed from the outer ring 2 by axially moving at a position where the claw portion 12m having a predetermined length reaches the fitting surface of the inner side fitting portion 2a. Note that the guide surface may be formed on the circumferential side of the claw portion 12m having a predetermined length.

In the second embodiment and the third embodiment of the wheel bearing device 1, the axial positions of the groove portions 2g and 2h having a predetermined length of the outer ring 2, the circumferential distance, the groove portion length, and the like are different from each other. The claw portion 12m having a predetermined length of the sensor holder 12 may be formed at a position and a size corresponding to the plurality of groove portions 2g and 2h having a predetermined length. With this configuration, the wheel bearing device 1 can dispose the sensor holder 12 at a predetermined axial position and a position around the axis with respect to the outer ring 2. Further, the wheel bearing device 1 may have a configuration in which the groove portion 2f is formed in the outer ring 2 and the plurality of claw portions 12m having a predetermined length are formed in the sensor holder 12.

Next, the claw portions 2j of the outer ring 2 and the groove portions 12n of the sensor holder 12 in the wheel bearing device 16 which is another embodiment of the wheel bearing device, and the engagement thereof will be described in detail with reference to FIG. ..

As shown in FIG. 7, the inner fitting portion 2a of the outer ring 2 is formed with a claw portion 2j (thin ink portion) having an annular shape or a plurality of predetermined lengths. The claw portion 2j projects radially inward of the inner fitting portion 2a. The sensor holder fitting portion 12d is formed with an annular or plural groove portions 12n. In the sensor holder 12, the groove 12n is fitted to the claw 2j of the outer ring 2 in a state where the step 12c of the sensor holder 12 is in contact with the inner side end of the outer ring 2. As a result, the sensor holder 12 is held by the outer ring 2 even if the pull-out resistance due to the press-fitting is not generated, and the inner opening of the outer ring 2 is sealed.

A wheel bearing device 1 according to the present application includes a hub wheel 3 into which an inner ring 4 is fitted as an inner member, and an outer ring 2 serving as an outer member, an inner ring 4 serving as an inner member, and a fitted body of the hub wheel 3. Although it is a third generation structure with an inner ring rotation specification composed of, a first generation structure composed of an outer ring that is an outer member and a pair of inner rings that is an inner member, and an outer ring that is an outer member and an inner member It may be a second generation structure of an inner ring rotating specification configured by a pair of inner rings that are members, and the pair of inner rings being fitted to the outer periphery of the hub wheel.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all and is merely an example, and further various modifications may be made without departing from the scope of the present invention. It goes without saying that the present invention can be carried out in the following forms, and the scope of the present invention is shown by the description of the claims, and further, the equivalent meanings in the claims and all modifications within the scope are Including.

1 Wheel Bearing Device 2 Outer Ring 2f Annular Groove 3 Hub Ring 4 Inner Ring 12 Sensor Holder (Sensor Cap)
12b Sensor holder fitting part 12c Mounting part 12e Annular claw part 15 Magnetic sensor

Claims (3)

A fitting portion fitted to the outer member of the wheel bearing device,
In a sensor holder of a bearing device for a wheel having a mounting portion to which a magnetic sensor is mounted,
A sensor holder for a wheel bearing device, wherein the fitting portion is provided with a claw portion fitted to the outer member, and an elastic member for sealing a gap between the fitting portion and the outer member. . The sensor holder for a wheel bearing device according to claim 1, wherein the claw portion has a slit. An outer member having a double row outer raceway surface formed on the inner circumference,
A hub wheel having a small-diameter step portion extending in the axial direction formed on the outer circumference, and at least one inner ring press-fitted into the small-diameter step portion of the hub wheel, wherein An inner member formed with a double row of inner raceway surfaces facing the outer raceway surface of the row,
A double row rolling element housed between the raceways of the outer member and the inner member so as to be rollable,
An encoder ring having magnetism in which magnetism alternately changes at equal intervals in the circumferential direction, and an encoder ring press-fitted to an inner end of the inner member,
A wheel bearing device comprising: the sensor holder for the wheel bearing device according to claim 1 or 2, which is fitted to the outer member and the magnetic sensor is attached to the attachment portion.
A groove is formed in the outer member,
A bearing device for a wheel, wherein the claw portion of the sensor holder is fitted in the groove portion.

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