JP5471139B2 - Rolling bearing device for wheels - Google Patents

Description

  The present invention relates to a wheel rolling bearing device.

Conventionally, for example, as disclosed in Patent Document 1, an outer ring member assembled to a knuckle as a vehicle body side member, an inner ring member assembled to a shaft portion protruding from an end surface of an outer ring of a constant velocity joint, and an outer ring member 2. Description of the Related Art A wheel rolling bearing device having a structure including a rolling element disposed so as to be able to roll between an inner ring member and an inner ring member is known.
In the rolling bearing device for a wheel having such a structure, the magnetized ring magnetized so that the magnetic characteristics alternately change in the circumferential direction corresponding to the vehicle speed sensor is the inner ring on the side with respect to the end surface of the outer ring of the constant velocity joint. The member may be assembled to the outer peripheral surface near one end of the member.
In this case, the magnetized ring is exposed before the wheel rolling bearing device is assembled to the knuckle (vehicle body side member) and the shaft portion of the outer ring of the constant velocity joint, and, for example, iron powder adheres to the magnetized ring. Sometimes.
In order to prevent iron powder from adhering to the magnetized ring, for example, as disclosed in Patent Document 2, a structure in which the magnetized ring is covered and protected by a protective member is known. .

JP 2003-136908 A JP 2004-176827 A

By the way, in the rolling bearing device for a wheel having the structure disclosed in Patent Document 1, an abnormal noise due to stick-slip is generated between the contact portions between the outer ring end surface of the constant velocity joint and the caulking portion end surface of the inner ring member. (Cinch sound) is likely to occur.
For this reason, in the rolling bearing device for a wheel disclosed in Patent Document 1, a concave groove is formed in the central portion in the radial direction of the end face of the caulking portion, and the friction energy is reduced by filling the concave groove with grease. Occurrence of abnormal noise (cinch sound) due to stick-slip was suppressed.
Further, in the wheel rolling bearing device having the structure as disclosed in Patent Document 1, the magnetic characteristics alternately change in the circumferential direction on the outer peripheral surface near one end of the inner ring member on the side of the constant velocity joint with respect to the end surface of the outer ring. When a magnetized ring magnetized is provided, it may be difficult to attach a protective member that protects the magnetized ring.

  In view of the above problems, an object of the present invention is to prevent stick-slip at a position facing one end surface of the inner ring member by positioning and attaching a protective member to one of the outer ring member and the inner ring member. To provide a rolling bearing device for a wheel in which a lubricant can be disposed.

In order to solve the above-mentioned problems, a rolling bearing device for a wheel according to claim 1 of the present invention includes an outer ring member assembled to a vehicle body side member and an inner ring assembled to a shaft portion protruding from an end surface of the outer ring of the constant velocity joint. A member, and a rolling element disposed so as to be capable of rolling between the outer ring member and the inner ring member, and in a circumferential direction on the outer circumferential surface near the one end of the inner ring member on the side of the constant velocity joint with respect to the end surface of the outer ring. A rolling bearing device for a wheel in which a magnetized ring magnetized so that the magnetic characteristics are alternately changed is assembled,
Of the outer ring member and the inner ring member, a protective member for protecting the magnetized ring is attached to one member.
The protective member is an attachment portion that is positioned and attached to one of the outer ring member and the inner ring member;
A cover for covering and protecting the magnetized surface of the magnetized ring;
E Bei a lubricant to prevent the one end face are disposed in opposite positions to the stick-slip of the inner ring member,
When the cover of the protective member is removed, the lubricant is left on one end surface of the inner ring member .

According to the above configuration, one of the outer ring member and the inner ring member in a state during transportation or storage before assembling the wheel rolling bearing device to the shaft portion of the outer ring of the vehicle body side member (for example, knuckle) and the constant velocity joint. The protective member is positioned on and attached to the member of the inner ring member by covering the magnetized surface of the magnetized ring with the cover of the protective member, and at the same time facing the one end surface of the inner ring member. A lubricant that prevents stick-slip can be disposed at a position where the slip occurs.
In the attached state of the protection member, the magnetized surface of the magnetized ring can be covered and protected by the cover, so that foreign matter such as iron powder can be prevented from being adsorbed on the magnetized surface of the magnetized ring. it can.
Further, in the vehicle assembly line, the protective member is removed immediately before assembling the wheel rolling bearing device to the vehicle body side member and the shaft portion of the outer ring of the constant velocity joint.
At this time, the lubricant is left in a state of being disposed at a position facing the one end surface of the inner ring member.
And the rolling bearing device for wheels is assembled | attached to the axial part of a vehicle body side member and the outer ring of a constant velocity joint in the state which the lubricant arrange | positioned at the one end surface of the inner ring member contacted the end surface of the outer ring of a constant velocity joint.
In this assembled state, it is possible to suppress the generation of abnormal noise (cinch noise) due to stick-slip with the lubricant.

The rolling bearing device for a wheel according to claim 2 is the rolling bearing device for a wheel according to claim 1,
The protective member includes a cover portion that forms an annular shape along the magnetized surface of the magnetized ring,
An attachment part that is formed in a cylindrical shape along the outer peripheral edge of the cover part and is positioned and attached by being fitted to the outer peripheral surface of one end part of the outer ring member;
An inner diameter extension portion formed extending from the inner diameter edge of the cover portion toward the center and facing one end surface of the inner ring member;
And an adhesive having an adhesive property that is applied to the inner diameter extension portion and attached to one end surface of the inner ring member.

According to the above configuration, the protective member has a cylindrical mounting portion at one end of the outer ring member in a state during transportation or storage before the rolling bearing device for the wheel is assembled to the shaft portion of the outer ring of the vehicle body side member and the constant velocity joint. It is possible to cover and protect the magnetized surface of the magnetized ring by the cover part of the protective member, and at the same time, lubricate with adhesive applied to the inner diameter extension part A material (for example, grease) can be disposed on one end face of the inner ring member.
Further, the protective member is removed immediately before assembling the wheel rolling bearing device on the vehicle body side member and the shaft portion of the outer ring of the constant velocity joint in the assembly line of the vehicle.
At this time, a part of the lubricant for preventing stick-slip is left attached to one end surface of the inner ring member.
And the rolling bearing device for wheels is assembled | attached to the axial part of a vehicle body side member and the outer ring of a constant velocity joint in the state which the lubricant arrange | positioned at the one end surface of the inner ring member contacted the end surface of the outer ring of a constant velocity joint. For this reason, generation | occurrence | production of the noise by stick-slip can be suppressed favorably with a lubricant.

The rolling bearing device for a wheel according to claim 3 is the rolling bearing device for a wheel according to claim 1,
The protective member is formed in a ring shape with a metal material having a smaller friction coefficient than the inner ring member, and a lubricant that also serves as an attachment portion that is positioned and fitted by being fitted into a recess on one end surface of the inner ring member;
And a cover portion that is removably coupled to the lubricant and has an annular shape along the magnetized surface of the magnetized ring.

According to the above configuration, the metal lubricant that also serves as the mounting portion is used as the inner ring member in the state of transportation and storage before assembling the rolling bearing device for the wheel to the vehicle body side member and the shaft portion of the outer ring of the constant velocity joint. The protective member is positioned and attached by being fitted into the recess on the one end surface. In this state, the magnetized surface of the magnetized ring is covered and protected by the cover portion of the protective member.
Further, in the vehicle assembly line, immediately before the rolling bearing device for the wheel is assembled to the shaft portion of the outer ring of the vehicle body side member and the constant velocity joint, the cover of the protective member is separated from the lubricant and removed, and the lubricant is removed from the inner ring member. It remains in the state fitted in the recessed part of the one end surface.
And the rolling bearing device for wheels is assembled | attached to the axial part of a vehicle body side member and the outer ring of a constant velocity joint in the state which the lubricant arrange | positioned at the one end surface of the inner ring member contacted the end surface of the outer ring of a constant velocity joint. For this reason, generation | occurrence | production of the noise by stick-slip can be suppressed favorably with a lubricant.

It is a longitudinal cross-sectional view which shows the state by which the rolling bearing device for wheels which concerns on Example 1 of this invention was each assembled | attached to the outer ring | wheel of the knuckle and the constant velocity joint. It is a longitudinal cross-sectional view which shows the state before the rolling bearing apparatus for wheels is similarly assembled | attached to the outer ring | wheel of a knuckle and a constant velocity joint, respectively. It is sectional drawing which expands and similarly shows the relationship between a magnetized ring and a protection member. It is a perspective view which fractures | ruptures and similarly shows a protection member. It is a longitudinal cross-sectional view which shows the state by which the rolling bearing device for wheels which concerns on Example 2 of this invention was each assembled | attached to the outer ring | wheel of the knuckle and the constant velocity joint. It is a longitudinal cross-sectional view which shows the state before the rolling bearing apparatus for wheels is similarly assembled | attached to the outer ring | wheel of a knuckle and a constant velocity joint, respectively. It is sectional drawing which expands and similarly shows the relationship between a magnetized ring and a protection member.

  The best mode for carrying out the present invention will be described in accordance with an embodiment.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the wheel rolling bearing device according to the first embodiment (sometimes referred to as a wheel hub unit) includes an outer ring member 50 and an inner ring constituting a double row angular ball bearing 31 as a rolling bearing. A member (sometimes referred to as a hub wheel) 40, a plurality of balls (corresponding to rolling elements of the present invention) 53 and 54, and cages 55 and 56 are provided.
That is, it fixes to the attachment surface of the knuckle 13 (or carrier) supported by the vehicle body side member, for example, the suspension device (not shown) of a vehicle, in the axial direction center part of the outer peripheral surface of the cylindrical outer ring member 50. Therefore, a fixing flange 57 is formed. The outer ring member 50 has an outer peripheral surface at one end inserted into the assembly hole of the knuckle 13 and a plurality of bolts (not shown) are fixed to the fixing flange 57 in contact with the mounting surface of the knuckle 13. It is fixed by being screwed into the mounting surface of the knuckle 13 through 57. Double row outer ring raceway surfaces 51 and 52 are formed on the inner peripheral surface of the outer ring member 50.

An inner ring member 40 in which double-row inner ring raceway surfaces 46 and 47 corresponding to double-row outer ring raceway surfaces 51 and 52 of the outer ring member 50 are formed on the outer peripheral surface includes a hub shaft 42 having a cylindrical shaft shape, and a hub shaft 42. It has integrally with the flange 43 formed in the outer peripheral surface near one end part.
The inner ring member 40 is spline-fitted into the inner hole of the hub shaft 42 with the spline shaft portion 22 protruding outward from the end surface of the outer ring 21 of the constant velocity joint 20 in the vehicle width direction. When the tightening nut 24 is tightened to the male thread portion 23, the inner ring member 40 and the outer ring 21 of the constant velocity joint 20 are coupled so as to be able to transmit torque.
A plurality of hub bolts 44 for attaching a wheel (not shown) with a brake rotor (not shown) interposed therebetween are fixed to the flange 43 by press-fitting at a predetermined pitch.
The constant velocity joint 20 is a known constant velocity joint called a Zepper type or a Barfield type, and includes an inner ring 26 integrally connected to one end of the drive shaft 25, an outer ring 21, A plurality of balls 27 disposed between the two wheels and a cage 28 for holding the plurality of balls 27 are provided (see FIG. 1).

Between the double row outer ring raceway surfaces 51 and 52 of the outer ring member 50 and the double row inner ring raceway surfaces 46 and 47 of the inner ring member 40, a plurality of balls 53 and 54 as rolling elements are provided in a cage 55, The rollers 56 are arranged so as to be able to roll while being held by the respective members 56.
Further, in the first embodiment, as shown in FIG. 1, the inner ring raceway surface 46 located on the flange 43 side of the hub shaft 42 among the both inner ring raceway surfaces 46, 47 provided on the outer peripheral surface of the hub shaft 42. Is formed by grinding the outer peripheral surface of the hub shaft 42, and the inner ring raceway surface 47 on the front end side of the hub shaft 42 is press-fitted and fixed to the outer peripheral surface near the front end of the hub shaft 42. Is formed.

Among the members of the outer ring member 50 and the inner ring member 40, one member has a magnetized ring (pulsar ring, magnetized so that magnetic characteristics (S pole, N pole) are alternately changed in the circumferential direction. 63 (sometimes called a magnetic encoder or the like).
In the first embodiment, as shown in FIG. 3, a pair of first seal member 60 and a first seal member 60, sometimes called a pack seal, are provided between the inner ring body 45 of the inner ring member 40 and one end of the outer ring member 50. A two-seal member 65 is incorporated.
The first seal member 60 includes a cylindrical part 61 formed in a cylindrical shape, and an annular part 62 bent at a right angle from one end of the cylindrical part 61 radially outward. The cylindrical portion 61 is press-fitted and fixed to the outer peripheral surface of the flange portion of the inner ring body 45.
A magnetized ring 63 is attached to the outer surface of the annular portion 62 of the first seal member 60 with an adhesive or the like.

On the other hand, the second seal member 65 includes a cylindrical portion 66 formed in a cylindrical shape and an annular portion 67 bent at a right angle inward in the radial direction from one end of the cylindrical portion 66. The cylindrical portion 66 is press-fitted and fixed to the inner peripheral surface of one end portion of the outer ring member 50.
Further, the second seal member 65 is formed with a lip 68 having rubber elasticity and slidably contacting the inner surface of the annular portion 62 of the first seal member 60 and a lip 69 slidably contacting the outer peripheral surface of the cylindrical portion 61. Has been.

As shown in FIGS. 2 and 3, a protective member 80 that covers and protects the magnetized surface of the magnetized ring 63 is attached to one of the outer ring member 50 and the inner ring member 40.
The protection member 80 includes an attachment portion 82 that is positioned and attached to one of the outer ring member 50 and the inner ring member 40, a cover portion 83 that covers and protects the magnetized surface of the magnetized ring 63, and an inner ring member And a lubricant 85 that is disposed at a position opposite to the end face of the inner ring body 45 at one end of 40 and prevents stick-slip.

As shown in FIGS. 3 and 4, in the first embodiment, the protection member 80 includes a cover portion 83 that is annular along the magnetized surface of the magnetized ring 63, and a cylinder along the outer peripheral edge of the cover portion 83. The inner ring body is formed by extending from the inner diameter edge of the cover portion 83 to the center side, and a mounting portion 82 that is positioned and attached by press fitting into the outer peripheral surface of one end portion of the outer ring member 50. An inner diameter extension 84 that faces one end face of 45, and a lubricant 85 that is applied to the inner diameter extension 84 and has an adhesive property such as grease that is attached to one end face of the inner ring body 45.
Moreover, the cover part 83 and the attachment part 82 of the protection member 80 can also be integrally formed, for example with a synthetic resin material, and can also be integrally formed by press molding of a metal plate.
The vehicle speed sensor 70 for the magnetized ring 63 is attached to an attachment hole formed in the knuckle 13 as a vehicle body side member with the detection unit 71 disposed at the tip thereof facing the magnetized surface of the magnetized ring 63. (See FIG. 1).

The wheel rolling bearing device according to the first embodiment is configured as described above.
Therefore, as shown in FIG. 4, the protective member is in a state during transportation and storage before assembling the wheel rolling bearing device to the knuckle 13 as the vehicle body side member and the spline shaft portion 22 of the outer ring 21 of the constant velocity joint 20. A lubricant 85 having adhesiveness such as grease is applied to the inner surface of the inner diameter extension portion 84 of 80 in a region extending from the inner diameter edge to the outer diameter edge of the end surface of the inner ring body 45.
As shown in FIGS. 2 and 3, the protective member 80 is positioned and attached to the outer ring member 50 by being fitted into the outer peripheral surface of one end of the outer ring member 50 at the cylindrical attachment portion 82. It is done.

Simultaneously with the attachment of the protective member 80, the magnetized surface of the magnetized ring 63 is covered and protected by the cover portion 83 of the protective member 80, and the adhesive 85 applied to the inner diameter extension portion 84 is provided with an adhesive lubricant 85. It arrange | positions in contact with the end surface of the body 45, and is affixed by the adhesiveness of the lubricant 85 itself.
In the attached state of the protection member 80, the cover 83 can cover and protect the magnetized surface of the magnetized ring 63, so that foreign matter such as iron powder is adsorbed on the magnetized surface of the magnetized ring 63. This can be prevented.

In the vehicle assembly line, the protective member 80 is removed immediately before the wheel rolling bearing device is assembled to the knuckle 13 and the spline shaft portion 22 of the outer ring 21 of the constant velocity joint 20.
At this time, a part of the adhesive lubricant 85 is left in a state of being adhered to one end surface of the inner ring body 45 by its own adhesive force.
Then, with the lubricant 85 disposed on the end face of the inner ring body 45 in contact with the end face of the outer ring 21 of the constant velocity joint 20, as shown in FIG. 1, the knuckle 13 and the spline shaft of the outer ring 21 of the constant velocity joint 20. A wheel rolling bearing device is assembled to the portion 22.
For this reason, it is possible to satisfactorily suppress the occurrence of noise due to stick slip between the end surface of the outer ring 21 of the constant velocity joint 20 and the end surface of the inner ring body 45 by the lubricant 85.
Further, the vehicle speed sensor 70 is attached to an attachment hole formed in the knuckle 13 after removing the protective member 80.

Next, a second embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 6 and 7, in the wheel rolling bearing device according to the second embodiment, the configuration of the protection member 180 is changed, and the ring is made of a metal material having a smaller friction coefficient than the inner ring body 145. A lubricant 185 that also serves as an attachment portion 182 that is positioned and attached by being press-fitted into a recess 145a formed on one end surface of the inner ring body 145, and is detachably coupled to the lubricant 185. The protective member 180 is configured to include a synthetic resin cover portion 183 that forms an annular shape along the magnetized surface of the magnetized ring 63.

As shown in FIG. 7, a coupling groove 185 a having a dovetail cross section is formed on one side surface of the metallic lubricant 185, and the lubricant 185 is set in a molding die corresponding to the cover portion 183. Then, the synthetic resin material is injected and filled into the cavity of the mold, so that the cover portion 183 is formed, and at the same time, a part of the synthetic resin material is filled into the coupling groove 185a to form the coupling portion 183a. The Thus, the synthetic resin cover 183 is detachably coupled to one side surface of the metal lubricant 185.
The inner diameter dimension of the lubricant 185 is substantially the same as the inner diameter dimension of the inner ring body 145, and the outer diameter dimension is set slightly larger than the inner diameter dimension of the recess 145a formed on one end surface of the inner ring body 145. The recess 145a is fitted into the recess 145a.
Further, the outer diameter dimension of the cover 83 is set slightly larger than the outer diameter dimension of the magnetized ring 63.
Since other configurations of the second embodiment are configured in the same manner as the first embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted.

The wheel rolling bearing device according to the second embodiment is configured as described above.
Accordingly, as shown in FIG. 7, in the state of transportation and storage before assembling the wheel rolling bearing device to the knuckle 13 as the vehicle body side member and the spline shaft portion 22 of the outer ring 21 of the constant velocity joint 20, as shown in FIG. The protective member 180 is positioned and attached by fitting a metal lubricant 185 also serving as 182 into the recess 145a of the inner ring body 145 by press fitting.
In this state, the magnetized surface of the magnetized ring 63 is covered and protected by the cover 83 of the protection member 180.
Further, in the vehicle assembly line, the cover 183 of the protective member 180 is separated from the lubricant 185 and removed immediately before assembly of the wheel rolling bearing device to the knuckle 13 and the spline shaft portion 22 of the outer ring 21 of the constant velocity joint 20. It is. At this time, the coupling portion 183 a of the cover portion 183 is forcibly pulled out from the coupling groove 185 a of the lubricant 185. Further, the coupling portion 183a may be broken with respect to the cover portion 183 and left in the coupling groove 185a.
Thereafter, as shown in FIG. 5, the wheel rolling on the knuckle 13 and the spline shaft portion 22 of the outer ring 21 of the constant velocity joint 20 with the lubricant 185 of the inner ring body 145 in contact with the end surface of the outer ring 21 of the constant velocity joint 20. A bearing device is assembled. For this reason, generation | occurrence | production of the noise by stick slip can be suppressed favorably with the metal lubricant 185 whose friction coefficient is smaller than the inner ring body 145.

  In addition, this invention is not limited to the said Example 1 and 2, In the range which does not deviate from the summary of this invention, it can also be implemented with a various form.

13 Knuckles (vehicle body side members)
31 Double row angular contact ball bearings (rolling bearings)
40 Inner ring member 45, 145 Inner ring body 50 Outer ring member 53, 54 Ball (rolling element)
63 Magnetized ring 70 Vehicle speed sensor 80, 180 Protective member 82, 182 Mounting part 83, 183 Cover part 85, 185 Lubricant

Claims (3)

An outer ring member assembled to the vehicle body side member, an inner ring member assembled to a shaft portion protruding from an end surface of the outer ring of the constant velocity joint, and a rolling element disposed so as to be able to roll between the outer ring member and the inner ring member For a wheel in which a magnetized ring magnetized so that magnetic characteristics are alternately changed in the circumferential direction is mounted on the outer peripheral surface near one end of the inner ring member on the side of the outer ring of the constant velocity joint. A rolling bearing device,
Of the outer ring member and the inner ring member, a protective member for protecting the magnetized ring is attached to one member.
The protective member is an attachment portion that is positioned and attached to one of the outer ring member and the inner ring member;
A cover for covering and protecting the magnetized surface of the magnetized ring;
E Bei a lubricant to prevent the one end face are disposed in opposite positions to the stick-slip of the inner ring member,
The wheel rolling bearing device according to claim 1, wherein when the cover portion of the protective member is removed, the lubricant is left on one end face of the inner ring member . It is a rolling bearing device for wheels according to claim 1,
The protective member includes a cover portion that forms an annular shape along the magnetized surface of the magnetized ring,
An attachment part that is formed in a cylindrical shape along the outer peripheral edge of the cover part, and is positioned and attached by fitting an outer peripheral surface of one end part of the outer ring member;
An inner diameter extension portion formed extending from the inner diameter edge of the cover portion toward the center and facing one end surface of the inner ring member;
A rolling bearing device for a wheel, comprising: an adhesive lubricant that is applied to the inner diameter extension portion and attached to one end surface of the inner ring member. It is a rolling bearing device for wheels according to claim 1,
The protective member is formed in a ring shape with a metal material having a smaller friction coefficient than the inner ring member, and a lubricant that also serves as an attachment portion that is positioned and fitted by being fitted into a recess on one end surface of the inner ring member;
A rolling bearing device for a wheel, comprising a cover portion removably coupled to the lubricant and having an annular shape along the magnetized surface of the magnetized ring.

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