JP2001018604A - Wheel bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent looseness between a hub ring and an inner ring fitting each other. SOLUTION: A wheel bearing device composed of an outer ring 30 having a flange 34 fitted on a car body and a double row outer race 32, a hub ring 10 having an inner race 12 facing one race of the double row outer race 32 and a flange 14 to mount a wheel, an inner ring 20 having an inner race 22 facing the other race of the double row outer race 32 and fitted on the hub ring 10, and double row balls 40 exist between the outer race 32 of the outer ring 30 and the inner races 12, 22 of the hub ring 10 and the inner ring 20. In the wheel bearing device, an uneven part 18 is formed on one or both of fitting surfaces of the hub ring 10 and the inner ring 20, and the hub ring 10 and the inner ring 20 are plastically bonded by increasing or decreasing the diameter of the fitting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing device for supporting a vehicle wheel, and more particularly, to a unitized hub wheel and a double-row wheel bearing. One of which is formed directly on the hub wheel,
The present invention relates to a wheel bearing device in which the other is formed as an inner ring fitted to a hub wheel separate from the hub wheel.

[0002]

2. Description of the Related Art A conventional wheel bearing device is shown in FIG.
As shown in FIG. 6, the hub wheel 10, the inner ring 20, the outer ring 30, and the rolling elements 40 are main components, and one of the inner races 12 of the double row inner race is
The inner race 22 is formed directly on the hub wheel 1.
The inner ring 20 is formed separately from the hub ring 10 and fitted to the hub wheel 10.

[0003] The hub wheel 10 has a flange 14 for supporting the wheel, and a first inner race 12 is formed on the outer peripheral surface near the flange 14. The inner race 20 has a ring shape and has a second inner race 22 formed on the outer periphery. The inner ring 20 is fitted into the small-diameter cylindrical portion 11 formed at the end of the hub wheel 10 and is in contact with the shoulder surface of the small-diameter cylindrical portion of the hub wheel 10 at the end surface. A double row outer race 32 facing the first and second inner races 12 and 22 is formed on the inner peripheral surface of the outer race 30. A double row rolling element 40 is incorporated between the double row inner races 12 and 22 and the double row outer race 32.

[0004] The shaft end of the small-diameter cylindrical portion 11 of the hub wheel 10 protruding from the inner ring 20 is bent and crimped as indicated by reference numeral 19 to join them together, and is mounted on the outer peripheral surface of the outer ring 30 in the form of an outward flange. The part 34 fixes the outer ring 30 to the suspension device and fixes the wheel to the flange 14 of the hub wheel 10.

[0005]

In this type of wheel bearing device, a bearing is usually used with a preload applied thereto, and precise preload management is performed during assembly. However,
Since multiple rows of inner races are distributed to the hub wheel and the inner ring, changes in the axial positional relationship between the hub wheel and the inner ring result in changes in the dimensions between the multiple rows of inner races. As a result, the clearance of the bearing changes to cause preload loss.
Therefore, the hub wheel 10 and the inner wheel 20 must be connected with high reliability. However, since a large moment load acts on the bearing part particularly when the vehicle turns, the conventional method of bending and caulking the shaft end of the small-diameter cylindrical part 11 of the hub wheel 10 loosens due to springback or other causes of the caulked part. There is a problem that occurs.

Accordingly, a main object of the present invention is to prevent a hub wheel and an inner ring fitted together from loosening.

[0007]

According to a first aspect of the present invention, there is provided an outer member having a flange for mounting to a vehicle body and a double-row outer race, or one of a double-row outer race of the outer member. A hub wheel having an inner race and a wheel mounting flange, an inner ring having an inner race opposed to the other of the double row outer races of the outer member and fitted to the hub wheel, and an outer race and a hub of the outer member In a wheel bearing device comprising a double row of balls interposed between a wheel and an inner race of an inner ring, an uneven portion is formed on one or both of a fitting surface of a hub wheel and an inner ring, and a fitting portion is formed. A wheel bearing device characterized in that both are plastically connected by expanding or reducing the diameter of the wheel. According to the plastic coupling, the coupling strength is increased as compared with the conventional bending caulking, so that the problem of loosening between the hub wheel and the inner ring fitted to each other is solved, and the preload is prevented from dropping out.

The mode of fitting between the hub wheel and the inner ring is such that when the hub ring is the inner fitting member and the inner ring is the outer fitting member (claim 2), conversely, the inner ring is the inner fitting member and the hub wheel is the inner fitting member. Is an outer fitting member (claim 3). When the small-diameter cylindrical portion is formed at one end of the hub ring and the inner ring is fitted to the outer peripheral surface of the small-diameter cylindrical portion, the fitting surface of the inner fitting member, that is, the hub wheel is provided. The concave and convex portions are formed on the outer peripheral surface of the small diameter cylindrical portion or the fitting surface of the outer fitting member, that is, the inner peripheral surface of the inner ring or both. In the case where a small-diameter cylindrical portion is formed at one end of the inner ring and a hub ring is fitted to the outer peripheral surface of the small-diameter cylindrical portion, the fitting surface of the inner fitting member, that is, the inner ring is formed. An uneven portion is formed on the outer peripheral surface of the small diameter cylindrical portion or the fitting surface of the outer fitting member, that is, the inner peripheral surface of the hub wheel or both.

[0009] Examples of the form of the concavo-convex portion formed on the fitting surface include a spiral shape such as a screw, an iris knurl, a serration, or a spline shape (hereinafter, in the claims, serration means spline. Selectively included). By expanding or reducing the diameter of the fitting portion, the uneven portion of one fitting surface bites into the other fitting surface, and the hub wheel and the inner ring are plastically connected. After the hub wheel and the inner ring are fitted, the diameter of the fitting portion of the inner fitting member is increased (claim 9), or the diameter of the fitting portion of the outer fitting member is reduced (claim 1).
0). When the inner ring is fitted to the outer peripheral surface of the small-diameter cylindrical portion of the hub wheel as in the invention of claim 2, the fitting portion of the small-diameter cylindrical portion of the hub wheel is enlarged, or the inner ring is fitted. To reduce the diameter. When the hub ring is fitted to the outer peripheral surface of the small-diameter cylindrical portion of the inner ring as in the invention of claim 3, the diameter of the fitting portion of the small-diameter cylindrical portion of the inner ring is increased, or the fitting portion of the hub wheel is fitted. To reduce the diameter.

According to a fourth aspect of the present invention, in the wheel bearing device according to any one of the first to third aspects, the inner fitting member has an axial through hole. When the hub wheel is the inner fitting member, a through hole is provided in the hub wheel in the entire axial direction, and when the inner ring is the inner fitting member, the inner ring is provided with a through hole in the entire axial direction. By adopting such a configuration, since the entire wheel bearing device has a hollow structure, the heat radiation effect is enhanced, and the amount of temperature rise in the bearing portion can be suppressed, thereby contributing to an improvement in durability.

According to a fifth aspect of the present invention, in the wheel bearing device according to any one of the first to fourth aspects, the swaged portions of the hub wheel and the inner ring are subjected to a hardening treatment by heat treatment. The unevenness has higher hardness than other parts due to work hardening accompanying unevenness processing, but by further performing hardening treatment by heat treatment, elastic deformation after crimping due to diameter expansion or contraction decreases, The effect of preventing loosening can be enhanced.

According to a sixth aspect of the present invention, in the wheel bearing device according to any one of the first to fifth aspects, an end of a fitting portion between the hub wheel and the inner ring is welded. Thereby, the hub wheel and the inner wheel can be more securely connected. In addition to welding over the entire circumference, one or two or more welding points may be dispersedly arranged in the circumferential direction.

According to a seventh aspect of the present invention, in the wheel bearing device according to any one of the first to fifth aspects, a clip is attached to an end of the inner fitting member to fix the hub wheel and the inner ring in the axial direction. It is characterized by the following. When the hub wheel becomes the inner fitting member, a clip is attached to an annular groove formed on the outer peripheral surface of the small diameter cylindrical portion of the hub wheel to engage with the end surface of the inner ring, and when the inner ring becomes the inner fitting member, the inner ring The clip is attached to an annular groove formed on the outer peripheral surface of the small-diameter cylindrical portion, and is engaged with the end surface of the hub wheel. Thereby, the hub wheel and the inner wheel can be more securely connected.

According to an eighth aspect of the present invention, in the wheel bearing device according to any one of the first to seventh aspects, a reinforcing member is press-fitted into a caulked portion of the hub wheel and the inner ring. The reinforcing member can increase the rigidity of the swaged portion whose diameter has been increased or reduced, and can prevent the swaged portion from being loosened due to springback or other causes.

The invention according to claim 11 is applied to a bearing device for a drive wheel, and includes an outer member having a flange for mounting to a vehicle body and a double-row outer race, and a double-row outer race of the outer member. A hub wheel having an inner race opposed to one side and a wheel mounting flange, an inner ring having an inner race opposed to the other of the outer races of the double row of outer members, a constant velocity universal joint fitted with the hub wheel and the inner ring. An outer joint member, and a wheel bearing device including a double row of balls interposed between an outer race of an outer member and an inner race of a hub wheel and an inner ring, wherein a fitting surface of the hub wheel and the outer joint member is provided. An uneven portion is formed on one or both of them, and the diameter of the fitting portion is expanded or reduced, whereby the both are plastically connected.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, the embodiment shown in FIGS.
With the hub wheel 10 as the inner fitting member and the inner ring 20 as the outer fitting member, the basic configuration will be described with reference to FIG. 1. The wheel bearing device comprises a hub wheel 10, an inner ring 20, and an outer ring (outer ring). ) And the rolling elements 40 are main components. Here, the side that is closer to the outside of the vehicle when assembled to the vehicle is called the outboard side, and the left side in the figure is the outboard side. On the other hand, the side closer to the center of the vehicle is called the inboard side, and the right side in the figure is the inboard side.

The hub wheel 10 has a flange 14 for mounting a wheel (not shown) at an end on the outboard side, and a hub bolt for fixing a wheel disc at equal circumferential positions of the flange 14. 15 are implanted. The inner race 12 on the outboard side is formed on the outer peripheral surface of the hub wheel 10 near the flange 14. The hub wheel 10 has a through hole 16 in the axial direction at an axial center portion, and a small-diameter cylindrical portion 11 is formed at an inboard end.

The inner ring 20 is a ring-shaped member separate from the hub wheel 10, and is fitted on the outer peripheral surface of the small-diameter cylindrical portion 11 of the hub wheel 10. An inner race 22 on the inboard side is formed on the outer peripheral portion of the inner ring 20, and the end face 23 on the outboard side of the inner ring 20 comes into contact with the shoulder surface 13 of the small-diameter cylindrical portion 11 of the hub wheel 10. ,
The dimensions between 22 are defined.

The outer race 30 has a double-row outer race 32 formed on an inner periphery thereof, and a flange-like attachment portion 34 for attachment to a vehicle body (not shown) on an outer periphery thereof. Seals 36 and 38 as sealing devices are attached to the openings at both ends of the outer ring 30 to prevent leakage of grease filled in the inside of the bearing and intrusion of water or foreign matter from the outside.

Between the inner race 12 of the hub wheel 10 and the inner race 22 of the inner race 20 and the outer race 32 of the outer race 30, double rows of rolling elements 40 held at equal intervals by a retainer are incorporated. ing. Here, rolling element 4
The case of a double-row angular contact ball bearing using a ball as 0 is shown, but in the case of a wheel bearing device for a heavy automobile, a double-row tapered roller bearing using a tapered roller as a rolling element is employed. In some cases.

FIG. 1 shows an embodiment in which an inner ring 20 is fitted to a small-diameter cylindrical portion 11 of a hub wheel 10 having an uneven portion 18 formed on an outer peripheral surface of an end portion. Then, the portion of the small-diameter cylindrical portion 11 where the uneven portion 18 is formed is enlarged from the inner diameter side to the outer diameter side as indicated by reference numeral 17 and caulked, thereby causing the uneven portion 18 to bite into the inner peripheral surface of the inner ring 20. The hub wheel 10 and the inner ring 20 are plastically connected.

When such diameter expansion is performed by press working,
For example, as shown in FIG. 2, a crimping jig 51 having an outer diameter larger than the inner diameter of the through hole 16 of the hub wheel 10 in a state where the inboard end of the hub wheel 10 is supported by the backup jig 50. Is moved in the direction of the arrow and press-fitted into the through-hole 16 to expand the portion of the small-diameter cylindrical portion 11 where the uneven portion 18 is formed from the inner diameter side to the outer diameter side. The portion of the small-diameter cylindrical portion 11 caulked by the diameter expansion, that is, the caulked portion is indicated by reference numeral 17. As a result, the uneven portion 18 of the small-diameter cylindrical portion 11 bites into the inner peripheral surface of the inner ring 20, and the hub wheel 10 and the inner ring 20 are plastically coupled. Although not shown, a jig that restrains the outer diameter of the inner ring 20 is used when the uneven portion 18 is expanded from the inner diameter side and swaged,
On the other hand, when the inner ring 20 is caulked by reducing its diameter from the outer diameter side, a highly accurate caulking process can be performed by using a jig that restrains the inner diameter of the small-diameter cylindrical portion 11.

FIG. 3 shows a specific example of the concavo-convex portion 18. As shown in FIG. FIG. 3A shows a screw 18A, and FIG.
(B) shows the case of the serration 18B, and FIG. 3 (C) shows the case of the iris knurl 18C. The degree of processing, such as the shape and dimensions of screws, serrations, knurls, etc., can be varied in accordance with the required items and levels. The thickness of the small-diameter cylindrical portion 11 of the hub wheel 10 and the thickness of the inner ring 20, which is the mating side, can be variously devised depending on required items and levels.

The unevenness 18 has a higher hardness than other parts due to the work hardening accompanying the unevenness processing, but may be further subjected to a hardening treatment by a heat treatment. By doing so, the elastic deformation after caulking due to the expansion or contraction of the diameter is reduced, and the effect of preventing loosening can be enhanced.

The embodiment shown in FIG. 4 is different from the embodiment shown in FIG.
By welding 0, the connection between the two is made more reliable. Here, a case where the fitting portion between the hub wheel 10 and the inner ring 20 is welded over the entire circumference is illustrated.

In the embodiment shown in FIG. 5, the hub end of the hub wheel 10 and the inner ring 20 are connected to each other by protruding the shaft end of the hub wheel 10 from the inner ring 20 and attaching a clip 53 to an annular groove formed on the outer peripheral portion thereof. The inner ring 20 is fixed in the axial direction to prevent the inner ring 20 from coming off.

In the embodiment shown in FIG. 6, a reinforcing member 54 for reinforcing and stabilizing the caulking portion 17 is press-fitted into the caulking portion 17 of the hub wheel 10. This reinforcing member 54
Plays a role in compensating for a decrease in rigidity of the caulked portion 17 after the diameter expansion, and may have a solid short-axis shape in addition to a bottomed cylindrical shape as shown in the figure. In any case, when the hub wheel 10 has the through hole 16 over the entire length, a small hole 55 penetrating in the axial direction is provided in the reinforcing member 54 to promote ventilation, thereby suppressing a temperature rise of the hub wheel 10. Can be.

In the embodiment shown in FIG. 7, the rigidity is increased by making the hub wheel 10 solid. In this case, the code 1
As shown by 6 ', a portion corresponding to the concave and convex portion 18 of the hub wheel 10 is hollow to enable the diameter to be increased from the inner diameter side.

Next, the hub wheel 1 will be described with reference to FIGS.
An embodiment in which 0 is an outer fitting member and the inner ring 20 is an inner fitting member will be described.

FIG. 8 shows an embodiment in which a small-diameter cylindrical portion 21 is formed by extending the outboard side of the inner ring 20, and this small-diameter cylindrical portion 21 is press-fitted into the through hole 16 of the hub wheel 10 so that both are fitted. The form is shown. In this case, an uneven portion 28 is formed on the outer peripheral surface of the end portion on the outboard side of the small-diameter cylindrical portion 21.
Then, as shown by reference numeral 27, the small-diameter cylindrical portion 21 is expanded from the inner diameter side to the outer diameter side and swaged to form the hub wheel 1.
0 and the inner ring 20 are plastically connected. When such diameter expansion is performed by press working, for example, as shown in FIG.
In a state where the inboard end surface of the inner race 20 is supported by the backup jig 56, the caulking jig 57 having an outer diameter larger than the inner diameter of the through hole 26 of the inner race 20 is moved in the direction of the arrow to move the inside of the through hole 26. By press-fitting, the portion of the small-diameter cylindrical portion 21 on which the uneven portions 28 are formed is enlarged from the inner diameter side to the outer diameter side. Reference numeral 27 denotes a portion of the small-diameter cylindrical portion 21 which is swaged by the expansion, that is, a swaged portion. Thereby, the uneven portion 28 of the small-diameter cylindrical portion 21 bites into the inner peripheral surface of the through hole 16 of the hub wheel 10, and the hub wheel 10 and the inner ring 20 are plastically coupled. Although not shown in the drawings, a jig that restrains the outer diameter of the hub wheel 10 is used when expanding and crimping the uneven portion 28 from the inner diameter side, while reducing the diameter of the hub wheel 10 from the outer diameter side. By using a jig that restrains the inner diameter of the small-diameter cylindrical portion 21 when caulking is performed, highly accurate caulking can be performed.

FIG. 10 shows a specific example of the uneven portion 28. FIG. 10A shows a screw 28A,
FIG. 10B shows the case of the serration 28B, and FIG. 10C shows the case of the iris knurl 28C. The degree of processing, such as the shape and dimensions of screws, serrations, knurls, etc., can be varied in accordance with the required items and levels. The thickness of the small-diameter cylindrical portion 21 of the inner ring 20 and the hub wheel 10 which is the mating side
Various thicknesses can be devised according to required items and levels.

In the embodiment shown in FIG. 11, the hub wheel 10 and the small-diameter cylindrical portion 21 of the inner ring 20 are welded at the end of the caulked portion 27 as shown by reference numeral 58, so that the connection between the two can be more reliably performed. It was made. Here, the hub wheel 1
The case where the fitting portion 27 of the small-diameter cylindrical portion 21 of the inner ring 20 is welded over the entire circumference is illustrated.

In the embodiment shown in FIG. 12, the hub end of the hub ring 10 is formed by projecting the shaft end of the small-diameter cylindrical portion 21 of the inner ring 20 from the hub ring 10 and attaching a clip 59 to an annular groove formed on the outer periphery thereof. The inner ring 20 is fixed in the axial direction to prevent the inner ring 20 from coming off. In the embodiment shown in FIG. 13, the reinforcing member 60 for reinforcing and stabilizing the caulking portion 27 is provided with the caulking portion 2 of the small-diameter cylindrical portion 21 of the inner race 20.
7 was press-fitted. The reinforcing member 60 serves to compensate for a decrease in rigidity of the caulked portion 27 after the diameter is increased, and may be a cylindrical member having a bottom as shown in the drawing or a solid short-axis member. In any case, when the inner race 20 has the through-hole 26 over the entire length, the inner race 2 is formed by providing a small hole 61 penetrating in the axial direction to promote ventilation.
0 temperature rise can be suppressed.

In the embodiment shown in FIG. 14, the inner ring 20 is made solid to increase rigidity. In this case, the inner ring 20
A concave portion 26 'is provided in a portion corresponding to the concave / convex portion 28 to allow the diameter to be increased from the inner diameter side.

FIG. 15 shows an embodiment in which the present invention is applied to a drive wheel bearing device.
The hub wheel 10 and the inner ring 20 are fitted to each other. Therefore, in this embodiment, the outer joint member 71 serves as an inner fitting member, and the hub wheel 10 and the inner ring 20 serve as outer fitting members. Here, the constant velocity universal joint 70 is connected to the outer joint member 7.
1, an inner joint member 80, a plurality of balls 88 incorporated between the inner and outer joint members 80 and 71, and a cage 86 for holding all the balls in the same plane. In FIG. 15, substantially the same components or parts as those in the embodiment of FIG. 1 are denoted by the same reference numerals.

The outer joint member 71 comprises a mouth part 72 and a stem part 74, and a shoulder 73 perpendicular to the axis forms a boundary between the two. The stem portion 74 has a hollow cylindrical shape and has an axial through hole 76 communicating with the inside of the mouth portion 72. Code 89
Is an end plate attached to the through hole 76 to prevent the grease filled in the mouth portion 72 from leaking. It is desirable to provide a small hole (not shown) for ventilation in the end plate 89. The inner peripheral surface 75 of the bowl-shaped mouth portion 72 has a concave spherical shape, and track grooves 77 extending in the axial direction are formed at a plurality of positions in the circumferential direction. The inner joint member 80 has track grooves 82 extending in the axial direction at a plurality of circumferential positions on the convex spherical outer peripheral surface 81. The inner joint member 80 is connected to a drive shaft (not shown) constituting a power transmission system at a serration hole 84. The cage 86 is slidably interposed between the concave spherical inner peripheral surface 75 of the outer joint member 71 and the convex spherical outer peripheral surface 81 of the inner joint member 80. Pockets 87 are formed at equally spaced positions in the circumferential direction of the cage 86, and one ball 88 is accommodated in each pocket 87. The track groove 77 of the outer joint member 71 and the track groove 82 of the inner joint member 80 form a pair.
One ball 88 is rollably incorporated between the two.

The hub wheel 10 and the inner ring 20 are fitted on the cylindrical outer peripheral surface of the stem portion 74 of the outer joint member 71. A screw as described above with reference to FIG. 3 and FIG.
Irregular portions 78 such as serrations and iris knurls are formed. Then, the stem portion 74 is press-fitted into the through hole 26 of the inner ring 20 and the through hole 16 of the hub wheel 10, and
Between the end face of the inner joint 20 and the shoulder face 73 of the outer joint member 71.
In the state where the stem portion 7
4, the stem portion 74 and the hub wheel 10 are expanded.
And are plastically bonded.

[0039]

As is apparent from the above description, the present invention provides a wheel in which a hub wheel and a double row bearing are unitized, and a double row inner race is distributed and provided on the hub wheel and the inner ring fitted to each other. In a bearing device for a vehicle, the intended technical problem of preventing the hub wheel and the inner ring from being loosened was solved by expanding or reducing the diameter of the fitting portion between the hub wheel and the inner ring, thereby plastically coupling the two. Things. Further, the present invention can be similarly applied to a wheel bearing device in which a hub wheel and an inner ring in which double-row inner races are distributed are fitted to an outer joint member of a constant velocity universal joint. By expanding or reducing the diameter of the fitting portion of the joint member and plastically coupling the two, it is possible to prevent the hub wheel and the inner ring from loosening.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a wheel bearing device according to an embodiment.

FIG. 2 is a longitudinal sectional view for explaining a diameter expanding step.

FIG. 3 is a front view of a hub wheel showing a specific example of an uneven portion.

FIG. 4 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 5 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 6 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 7 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 8 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 9 is a longitudinal sectional view for explaining a diameter expanding step.

FIG. 10 is a front view of an inner ring showing a specific example of the uneven portion.

FIG. 11 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 12 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 13 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 14 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 15 is a longitudinal sectional view of the wheel bearing device according to the embodiment.

FIG. 16 is a longitudinal sectional view of a wheel bearing device showing a conventional technique.

[Explanation of symbols]

 Reference Signs List 10 hub wheel 11 small diameter cylindrical portion 12 inner race (outboard side) 16 through hole 16 'concave portion 17 crimping portion 18, 18A, 18B, 18C uneven portion 20 inner ring 21 small diameter cylindrical portion 22 inner race (inboard side) 26 penetration Hole 26 'concave portion 27 crimping portion 28, 28A, 28B, 28C uneven portion 30 outer ring (outer member) 32 outer race 40 ball (rolling element) 50, 56 backup jig 51, 57 crimping jig 52, 58 welding Parts 53, 59 Clips 54, 60 Reinforcement members

Continuing from the front page (72) Inventor Keisuke Sone 1578 Higashikaizuka, Iwata-shi, Shizuoka Pref. (72) Inventor Yoshihiro Ozawa 1578 Higashikaizuka, Iwata-shi, Shizuoka F-term (reference) 3J017 AA02 DB04 DB06 DB07 DB08 DB09 3J101 AA02 AA32 AA43 AA54 AA62 AA72 BA53 BA56 DA01 DA16 DA20 FA60 GA03

Claims (11)

[Claims] An outer member having a flange for mounting to a vehicle body and a double row outer race, a hub wheel having an inner race facing one of the double row outer races of the outer member and a wheel mounting flange, An inner race having an inner race opposed to the other of the double row outer races of the outer member and fitted to the hub wheel; and an intermediate race between the outer race of the outer member and the hub race and the inner race of the inner race. In a wheel bearing device composed of multiple rows of balls, a concave and convex portion is formed on one or both of the fitting surfaces of the hub wheel and the inner ring, and the diameter of the fitting portion is increased or reduced to thereby form the two. A wheel bearing device characterized by being plastically coupled. 2. The wheel bearing device according to claim 1, wherein a small-diameter cylindrical portion is formed at one end of the hub wheel, and an inner ring is fitted on an outer peripheral surface of the small-diameter cylindrical portion. 3. The wheel bearing device according to claim 1, wherein a small-diameter cylindrical portion is formed at one end of the inner ring, and a hub wheel is fitted to an outer peripheral surface of the small-diameter cylindrical portion. 4. The wheel bearing device according to claim 1, wherein the inner fitting member has an axial through hole. 5. The wheel bearing device according to claim 1, wherein the caulking portion of the hub wheel and the inner ring is subjected to a hardening treatment by a heat treatment. 6. The wheel bearing device according to claim 1, wherein an end of a fitting portion between the hub wheel and the inner ring is welded. 7. The wheel bearing device according to claim 1, wherein a clip is attached to an end of the inner fitting member to fix the hub wheel and the inner ring in the axial direction. 8. The bearing device for a wheel according to claim 1, wherein a reinforcing member is press-fitted into a crimped portion between the hub wheel and the inner ring. 9. The method for manufacturing a bearing device for a wheel according to claim 1, wherein the fitting portion of the inner fitting member is expanded after the hub wheel and the inner ring are fitted. A method comprising: 10. The method for manufacturing a bearing device for a wheel according to claim 1, wherein the fitting portion of the outer fitting member is reduced in diameter after the hub wheel and the inner ring are fitted. A method comprising: 11. An outer member having a flange for mounting on a vehicle body and a double row outer race, a hub wheel having an inner race facing one of the double row outer races of the outer member and a wheel mounting flange, An inner race having an inner race opposed to the other of the outer races of the outer member in a double row, a hub wheel, an outer joint member of a constant velocity universal joint fitted to the inner race, and an outer race and a hub wheel of the outer member And a wheel bearing device composed of a double row of balls interposed between the inner race and the inner race of the inner race, wherein an uneven portion is formed on one or both of the fitting surfaces of the hub wheel and the outer joint member, and the fitting is performed. A wheel bearing device characterized in that both parts are plastically connected by increasing or decreasing the diameter of the portion.