JP2003065347A - Bearing device for axle and manufacturing method therefore - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact bearing device by making the connection of a hub wheel 101 with a constant velocity universal joint fastened and raising rigidity of the bearing device. SOLUTION: In the bearing device for an axle where the hub wheel 101 and a double row bearing 2 are united and an outside coupling member 4 of the constant velocity universal joint 3 is inserted in the united hub wheel 101 through serration parts 24, 25, the said hub wheel 101 is connected to the inner ring 112 at a plastic deformation part 130 flaring and caulking an inside circumference face of an inner ring 112 to an uneven part 131 by enlarging diameter of the hub wheel 101, besides at least one inner face 8 between inner races 7, 8 of the said double row bearing 2 is formed in another inner ring 112 being put on the said hub wheel 101 and the uneven part 131 is formed to outer circumference face of the hub wheel 101.

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 rotatably supporting drive wheels of an automobile (front wheels of FF vehicles, rear wheels of FR vehicles, all wheels of 4WD vehicles) with respect to a vehicle body, and manufacturing thereof. It is about the method.

[0002]

2. Description of the Related Art Various types of bearing devices for driving wheels of automobiles have been proposed according to their applications. For example, in the drive wheel bearing device shown in FIG. 9, the hub wheel 1 and the double-row bearing 2 are unitized, and the outer joint member 4 of the constant velocity universal joint 3 is press-fitted into the inner periphery of the hub wheel 1 so that torque can be transmitted. It has the structure described above.

The bearing 2 is a double-row angular contact ball bearing, the main part of which is composed of a double-row outer race 5 and an inner race 7, and double-row rolling elements 9 and 10 installed between the outer race 6 and the inner race 8. Is. In this bearing device,
Out of the double row inner races 7 and 8, one inner race 7 is directly formed on the outer peripheral surface of the hub wheel 1, and the other inner race 8 is the outer circumference of the inner ring 12 fitted to the small diameter end 11 of the hub wheel 1. Is formed on the surface. The double rows of outer races 5 and 6 are formed on the inner peripheral surface of the outer ring 13.

The hub wheel 1 has a wheel mounting flange 14 for mounting a wheel (not shown), and hub bolts 15 for fixing a wheel disk are planted at equal intervals in the circumferential direction of the wheel mounting flange 14. It is set up. Outer ring 1
3 has a vehicle body mounting flange 16 for mounting on a vehicle body (not shown), and this vehicle body mounting flange 16 is fixed to a knuckle extending from a suspension device of the vehicle body by a bolt.

The outer ring 13 is provided at the openings of both ends of the bearing 2.
And a pair of seals 17 and 18 for sealing the annular spaces of the hub ring 1 and the inner ring 12 are fitted to the inner diameter of the end of the outer ring 13,
It is designed to prevent leakage of the grease filled inside and intrusion of water and foreign substances from the outside.

In this bearing device, the inner ring 12 is fitted on the outer periphery of the small-diameter end 11 of the hub wheel 1, and then the small-diameter end 11 of the hub ring 1 is swaged by plastic deformation.
And the double row bearing 2 are unitized, and the caulking portion 19 and the inboard side end surface 20 of the inner ring 12 are engaged with each other to form the inner ring 1.
2 is prevented from coming off and the bearing 2 is preloaded. The caulking of the small-diameter end portion 11 of the hub wheel 1 is performed as shown in FIG.
The procedure is as shown in (b). Fig. 10 (a) is before caulking,
The figure (b) shows the state after caulking. As shown in FIG. 10A, the inner ring 12 is press-fitted into the hub ring 1,
As shown in (b), the small-diameter end portion 11 of the hub wheel 1 is swaged by an oscillating punch 21.

As shown in FIG. 9, the constant velocity universal joint 3 includes a mouth portion 22 containing an inner joint member, a ball and a cage.
And an outer joint member 4 that is integrally extended in the axial direction from the mouth portion 22 and has a shaft portion 23 having a serration portion 24 formed on the outer peripheral surface thereof. The shaft portion 23 of the outer joint member 4 is inserted into the through hole 26 of the hub wheel 1, and the both are fitted by the serration portions 24 and 25 formed on the outer peripheral surface of the shaft portion 23 and the inner peripheral surface of the through hole 26. The constant velocity universal joint 4 is fixed to the hub wheel 1 by making torque transmission possible and tightening the shaft end with a nut 27.

In this bearing device, the caulking portion 1 of the hub wheel 1
9 and the inboard side end surface 20 of the inner ring 12 are engaged to prevent the inner ring 12 from coming off and to manage the preload of the bearing 2. Particularly, the preload management of the bearing 2 is performed on the small diameter end 11 of the hub wheel 1.
Since it is performed by swaging, it is not necessary to control the preload of the bearing 2 by the tightening force of the outer joint member 4 by the nut 27, and the outer joint member 4 is fixed by the nut 27 to the extent that the outer joint member 4 is not pulled out from the hub wheel 1. Has been done.

[0009]

By the way, in the bearing device, the hub wheel 1 and the bearing 2 which are unitized,
The outer joint member 4 has a structure in which the shaft portion 23 of the outer joint member 4 is press-fitted into the through hole 26 of the hub wheel 1 and fitted by the serration portions 24 and 25, and the outer joint member 4 is fastened and fixed to the hub wheel 1 by the nut 27. . In this structure, the small diameter end portion 1 of the hub wheel 1 is
The swaged portion 19 formed on the shoulder portion 2 of the outer joint member 4
However, since the contact surface of the caulking portion 19 with the shoulder portion 28 of the outer joint member 4 is not a flat surface at this time, the shaft portion 23 of the outer joint member 4 is connected to the hub wheel. When the nut 27 is fastened to the No. 1, the shoulder portion 28 of the outer joint member 4 and the swaged portion 19 of the hub wheel 1 are likely to be worn,
There may be rattling.

Further, in the structure in which the hub wheel 1 and the bearing 2 are unitized by forming the caulking portion 19 by plastically deforming the small-diameter end portion 11 of the hub wheel 1 by swing caulking, the caulking portion is formed. The axial dimension of the hub wheel 1 is required by the amount corresponding to 19, and the axial dimension of the entire bearing device becomes large, which makes it difficult to make it compact.

Therefore, the present invention has been proposed in view of the above problems, and an object thereof is to eliminate rattling by coupling a hub wheel and a constant velocity universal joint to enhance the rigidity of a bearing device and to make it compact. To provide a simple bearing device.

[0012]

As a technical means for achieving the above-mentioned object, a bearing device according to the present invention comprises a hub wheel and a double row bearing as a unit, and the hub wheel or the inner ring of the bearing is In a wheel bearing device in which an outer joint member of a constant velocity universal joint is fitted via a torque transmitting means, a separate body in which at least one inner race of the inner races of the double row bearing is fitted to the hub wheel. It is formed on the inner ring, and unevenness is formed on the fitting surface of either the hub wheel or the inner ring, and the fitting surface of the other is made to dig into the unevenness, and the hub wheel and the inner ring are joined by plastic deformation. It is characterized by

Thus, at least one of the inner races of the double-row bearing is formed on a separate inner ring fitted to the hub wheel, and the fitting surface of either one of the hub ring and the inner ring is uneven. By forming the other fitting surface into the unevenness and coupling the hub wheel and the inner ring by plastic deformation, the inboard side end surface of the inner ring is brought into contact with the shoulder portion of the outer joint member. In this state, the outer joint member of the constant velocity universal joint can be fixed to the hub wheel with a nut or the like. Since the inboard side end surface of the inner ring with which the shoulder portion of the outer joint member abuts is a flat surface, even if the outer joint member is tightened to the hub ring with a nut, the shoulder portion of the outer joint member and the inboard side end surface of the inner ring No wear occurs on the.
Further, since there is no caulking portion by the conventional rocking caulking between the shoulder portion of the outer joint member and the inboard side end surface of the inner ring, the axial dimension of the bearing device can be shortened.

As described above, the hub ring or the inner ring has a structure in which the concavities and convexities formed on one of the fitting surfaces are engaged with the other fitting surface and are joined by plastic deformation. The inner ring and the inner ring can be unitized, and the plastically deformed portion prevents the inner ring from coming off and manages the preload of the bearing.

In the above structure, an inlay is formed between the inner diameter of any one of the hub wheel and the inner ring disposed inside and the outer diameter of the outer joint member. As described above, since the inlay is formed by one of the hub wheel and the inner ring arranged on the inner side and the outer joint member, it becomes easy to realize a bearing device having high rigidity against moment load. .

Further, in the method of manufacturing the bearing device according to the present invention, the hub wheel and the double row bearing are unitized, and the outer joint member of the constant velocity universal joint is fitted into the hub wheel via the torque transmitting means. And forming at least one inner race of the inner races of the double-row bearing on a separate inner ring fitted to the hub wheel, and forming concavities and convexities on either one of the hub wheel and the inner ring. Together with the unevenness, the other fitting surface is bited into and the hub ring and the inner ring are joined by plastic deformation, and then the inner diameter of the joined portion is cut to a predetermined dimension, and between the outer joint member and It is characterized in that an inlay is formed.

After the hub ring and the inner ring are joined by plastic deformation in this way, the inner diameter of the joined portion is cut to a predetermined dimension to form an inlay with the outer joint member.
The formation of the inlay becomes easy.

In the above method, it is preferable that after the hub ring and the inner ring are joined by plastic deformation, a serration portion is formed on the inner diameter of the hub ring or the inner ring and the outer joint member is fitted therein. This is because when the hub ring and the inner ring are joined by plastic deformation, the inner diameter immediately below the joint before plastic deformation must be smaller than the other parts, and the serration part is formed in advance on the inner diameter of the hub ring or the inner ring. Because it is difficult to keep. Here, the serration unit includes splines other than serrations.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The drive wheel bearing device of the embodiment shown in FIG. 1 has a hub wheel 101, a double row bearing 2 and a constant velocity universal joint 3 as main constituent elements. Here, the side closer to the outer side of the vehicle when assembled to the vehicle is the outboard side (left side in the drawing), and the side closer to the center of the vehicle is the inboard side (right side in the drawing).

The bearing 2 is a double-row angular contact ball bearing whose main part is composed of a double-row outer race 5 and an inner race 7, and double-row rolling elements 9 and 10 installed between the outer race 6 and the inner race 8. Is. In this bearing device,
Of the multiple rows of inner races 7 and 8, one inner race 7 is directly formed on the outer peripheral surface of the hub wheel 101, and the other inner race 8 is the outer circumference of the inner ring 112 fitted to the small diameter end 111 of the hub wheel 101. Is formed on the surface. The double rows of outer races 5 and 6 are formed on the inner peripheral surface of the outer ring 13.

The hub wheel 101 has a wheel mounting flange 14 for mounting a wheel (not shown), and hub bolts 15 for fixing a wheel disk are planted at equal intervals in the circumferential direction of the wheel mounting flange 14. It is set up. The outer ring 13 has a vehicle body mounting flange 16 for mounting on a vehicle body (not shown), and the vehicle body mounting flange 16 is fixed to a knuckle extending from a suspension device of the vehicle body by a bolt.

The outer ring 13 is provided at the openings at both ends of the bearing 2.
A pair of seals 17 and 18 for sealing an annular space between the hub ring 101 and the inner ring 112 are fitted to the inner diameter of the end portion of the outer ring 13 to prevent leakage of grease filled inside and intrusion of water or foreign matter from the outside. It is designed to prevent it.

In this bearing device, the inner ring 112 is replaced by the hub ring 1.
01 is fitted to the outer periphery of the small diameter end portion 111 of the hub wheel 101, and then the small diameter end portion 111 of the hub wheel 101 is plastically deformed by expanding and caulking, and the small diameter end portion 111 of the hub wheel 101 and the inner ring 11 are
The two are joined by the plastic deformation portion 130 formed between the two. The hub wheel 101 and the double row bearing 2 are unitized by the plastically deforming portion 130 by the diameter expansion caulking, and the plastically deforming portion 130 prevents the inner ring 112 from coming off and manages the preload of the bearing 2.

The small diameter end 111 of the hub wheel 101 is enlarged and crimped on the outer peripheral surface of the small diameter end 111 of the hub wheel 101 by, for example, knurling or the like. Is formed, and the unevenness 131 is bitten into the inner peripheral surface of the inner ring 112 by expanding the diameter of the small-diameter end portion 111 from the inner diameter side, and the hub ring 101 and the inner ring 112 are joined by plastic deformation.

The shape of the irregularities 131 is arbitrary, and in addition to the knurled shape, it is also possible to employ one having a plurality of axial teeth formed at a plurality of circumferential positions (serration or spline). Further, the unevenness is formed on the inner peripheral surface of the inner ring 112, and the unevenness is bitten into the outer peripheral surface of the small diameter end portion 111 by expanding the diameter of the small diameter end portion 111 of the hub wheel 101 from the inner diameter side, and the hub wheel 101 and the inner ring 112 are formed. You may make it join by plastic deformation and.

In order to carry out the expansion expansion caulking, as shown in FIG. 2, the inner diameter φd ₂ of the joint portion 132 in which the small-diameter end portion 111 of the hub wheel 101 and the inner ring 112 are joined by plastic deformation is arranged on the outboard side portion. It is necessary to set it smaller than the inner diameter φd _{1 of the} portion where serrations are to be formed.

As described above, since the inner diameter φd ₂ of the connecting portion 132 of the hub wheel 101 and the inner ring 112 is smaller than the inner diameter φd _{1 of the} outboard side portion (portion where serration is to be formed),
It is difficult to previously form the serration portion on the inner peripheral surface of the hub wheel 101. From this, as shown in FIG. 3, after the diameter expansion caulking in which the hub wheel 101 and the inner ring 112 are joined by plastic deformation, the inner diameter portion (cross hatching portion in the figure) of the hub wheel 101 is turned, and then the figure As shown in FIG. 4, the serrated portion 25 is formed on the inner peripheral surface of the hub wheel 101 by broaching.

The constant velocity universal joint 3 has a mouth portion 22 accommodating an inner joint member, a ball and a retainer, and an axially integrally extending axial portion from the mouth portion 22 and a serration portion 24 formed on the outer peripheral surface thereof. Outer joint member 4 consisting of part 23
Have. The shaft portion 23 of the outer joint member 4 is attached to the hub wheel 10.
1 and the serration portions 24 and 25 formed on the outer peripheral surface of the shaft portion 23 and the inner peripheral surface of the through hole 26.
The two are fitted together to enable torque transmission, and the constant velocity universal joint 3 is fixed to the hub wheel 101 by tightening the shaft end with the nut 27.

In this bearing device, the hub wheel 101 and the inner ring 1
The plastic deformation portion 130 with 12 is used to prevent the inner ring 112 from coming off and to control the preload of the bearing 2. In particular, the preload management of the bearing 2 is performed by the plastic deformation portion 1 by expanding and caulking the hub wheel 101.
Since it is performed at 30, it is not necessary to manage the preload of the bearing 2 by the tightening force of the outer joint member 3 by the nut 27, and the outer joint member 4 is fixed by the nut 27 so as not to be pulled out from the hub wheel 101. There is.

As described above, the hub ring 101 and the inner ring 112 are joined by the plastically deforming portion 130 by expanding and caulking, so that the inboard side end surface of the inner ring 112 fitted to the small-diameter end 111 of the hub ring 101 is joined. The shaft portion 23 of the outer joint member 4 in a state in which 120 is brought into contact with the shoulder portion 28 of the outer joint member 4.
Can be fixed to the hub wheel 101 with the nut 27. Since the inboard side end surface 120 of the inner ring 112 with which the shoulder portion 28 of the outer joint member 4 abuts is a flat surface, even if the shaft portion 23 of the outer joint member 4 is tightened to the hub wheel 101 with the nut 27, the outer joint member Shoulder 28 of member 4 and inner ring 112
No wear occurs on the inboard-side end surface 120 of. Further, since there is no caulking portion by the conventional swing caulking between the inboard side end surface 120 of the inner ring 112 and the shoulder portion 28 of the outer joint member 4, the axial dimension of the bearing device can be shortened. You can

Between the shoulder portion 28 of the outer joint member 4 and the serration portion 24, the inner diameter of the hub ring 101 is turned after the diameter of the hub ring 101 is swaged, so that the hub ring 1 is turned.
01 between the inner diameter of 01 and the outer diameter of the outer joint member 4
33 is formed. By forming the inlay 133 with the hub wheel 101 and the outer joint member 4 in this way, it becomes easy to realize a bearing device having high rigidity against a moment load.

FIG. 5 shows another embodiment of the present invention, in which the plastically deformed portion 230 of the hub wheel 201 and the inner ring 212 formed by expanding and caulking is different from the embodiment of FIG.
That is, in the embodiment of FIG. 1, the inner ring 112 is fitted to the outer peripheral surface of the small diameter end portion 111 of the hub wheel 101, and the inner ring 11
2 has a small diameter end portion 111 of the hub wheel 101 arranged on the inner diameter side.
Hub ring 101 and inner ring 112
This is a case where the plastically deforming portion 130 and are formed at the inboard side position.

On the other hand, in the embodiment of FIG. 5, the inner ring 2
12 extends outboard side, the hub ring 201 is fitted to the outer peripheral surface of the extended small diameter end portion 211, and the small diameter end portion 21 of the inner ring 212 arranged on the inner diameter side of the hub ring 201.
Hub ring 201 and inner ring 21
2 has a structure in which the plastic deformation portion 230 is formed at the outboard side position.

In the embodiment of FIG. 5 as well, similar to the embodiment of FIG. 1, the small-diameter end portion 211 of the inner ring 212 is plastically deformed by expanding and caulking, and the small-diameter end portion 211 of the inner ring 212 is plastically deformed.
And the hub wheel 201 are joined together by a plastically deformable portion 230 formed between them. Plastic deformation part 2 due to this expanding and crimping
The hub wheel 201 and the double-row bearing 2 are unitized by 30, and the plastic deformation portion 230 prevents the inner ring 212 from coming off and preloads the bearing 2.

When the small-diameter end portion 211 of the inner ring 212 is expanded and caulked, a concavo-convex portion 231 such as knurling is formed on the outer peripheral surface of the small-diameter end portion 211 of the inner race 212 (the range in which the concavo-convex portion 231 is formed is indicated by X). Then, the unevenness 231 is bitten into the inner diameter surface of the hub wheel 201 by expanding the diameter of the small-diameter end portion 211 from the inner diameter side, and the hub wheel 201 and the inner ring 212 are joined by plastic deformation. In order to perform the diameter expansion caulking, as shown in FIG. 6, the inner diameter φd ₂ of the connecting portion 232, which is formed by plastic deformation of the hub wheel 201 and the small diameter end portion 211 of the inner ring 212, is changed to the inner diameter φ of the inboard side portion.
It is necessary to set it smaller than d ₁ .

As described above, the inner diameter φd ₂ of the connecting portion 232 of the hub wheel 201 and the inner ring 212 is equal to the inner diameter φd _{1 of the} inboard side portion.
Since it is smaller than the above, it is difficult to previously form the serration portion 25 on the inner peripheral surface of the inner ring 212.
As shown in FIG. 7, after the hub ring 201 and the inner ring 212 are joined by plastic deformation, the inner diameter of the inner ring 212 (the cross-hatched portion in the figure) is turned, and then the broach as shown in FIG. The serration portion 25 is formed on the inner peripheral surface of the inner ring 212 by processing.

Also in this embodiment, since the hub wheel 201 and the inner ring 212 are joined by the plastically deformable portion 230 by the diameter expansion caulking, the inboard side end surface 2 of the inner ring 212 is joined.
With 20 in contact with the shoulder portion 28 of the outer joint member 4,
The shaft portion 23 of the outer joint member 4 of the constant velocity universal joint 3 is attached to the nut 2
It can be fixed to the hub wheel 201 by 7. Since the inboard side end surface 220 of the inner ring 212 with which the shoulder portion 28 of the outer joint member 4 abuts is a flat surface, even if the shaft portion 23 of the outer joint member 4 is fastened to the hub wheel 201 with the nut 27, the outer joint member The shoulder portion 28 of the member 4 and the inboard side end surface 220 of the inner ring 212 do not wear. Further, since there is no caulking portion by the conventional rocking caulking between the inboard side end surface 220 of the inner ring 212 and the shoulder portion 28 of the outer joint member 4, the axial dimension of the bearing device can be shortened. You can

Between the shoulder portion 28 of the outer joint member 4 and the serration portion 24, an inlay 233 is formed between the inner diameter of the inner ring 212 and the outer diameter of the shaft portion 23 of the outer joint member 4. Since the inlay 233 is formed by the inner ring 212 and the outer joint member 4 in this way, it becomes easy to realize a bearing device having high rigidity against moment load.

[0039]

According to the present invention, at least one of the inner races of the double-row bearing is formed on a separate inner ring fitted to the hub wheel, and either the hub wheel or the inner ring is formed. By forming the unevenness on the fitting surface and biting the other fitting surface into the unevenness to connect the hub wheel and the inner ring by plastic deformation, the end surface of the inner ring on the inboard side is shouldered by the shoulder of the outer joint member. The outer joint member of the constant velocity universal joint can be fixed to the hub wheel with a nut or the like in a state of being brought into contact with the portion.

As a result, since the inboard side end surface of the inner ring with which the shoulder portion of the outer joint member abuts is a flat surface, even if the shaft portion of the outer joint member is fastened to the hub wheel with a nut, the outer joint member No wear occurs on the inboard side end surfaces of the shoulder portion and the inner ring. Further, since there is no caulking portion by the conventional rocking caulking between the inboard side end surface of the inner ring and the shoulder portion of the outer joint member, the axial dimension of the bearing device can be shortened. From the above, it is possible to provide a compact bearing device by connecting the hub wheel and the constant velocity universal joint to eliminate rattling and increasing the rigidity of the bearing device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of a wheel bearing device according to the present invention including a part of a drive wheel bearing device that is omitted.

FIG. 2 is an enlarged cross-sectional view of an essential part showing a diameter-expanded swaged portion of the hub wheel and the inner ring of FIG.

FIG. 3 is an enlarged cross-sectional view of an essential part for explaining a procedure for turning the inner diameter of the hub wheel in FIG.

FIG. 4 is an enlarged sectional view of an essential part showing a state where a serration part is formed on the inner peripheral surface of the hub wheel of FIG.

FIG. 5 is a cross-sectional view of another embodiment of the wheel bearing device according to the present invention, including a part of the drive wheel bearing device that is omitted.

6 is an enlarged cross-sectional view of an essential part showing a diameter-expanded swaged portion of the hub wheel and the inner ring of FIG.

FIG. 7 is an enlarged cross-sectional view of a main part for explaining a procedure for turning the inner diameter of the hub wheel in FIG.

8 is an enlarged sectional view of an essential part showing a state where a serration part is formed on the inner peripheral surface of the hub wheel of FIG. 7.

FIG. 9 is a cross-sectional view showing a bearing device for driving wheels in a conventional bearing device for wheels.

FIG. 10 (a) is a cross-sectional view showing a state before swing caulking of the small diameter end of the hub wheel in manufacturing the bearing device of FIG. 9;
(B) is sectional drawing which shows the state after swing caulking of the small diameter end part of a hub wheel.

[Explanation of symbols]

2 Double row bearing 3 constant velocity universal joint 4 Outer joint member 7,8 Inner race 101,201 hub wheel 112,212 inner ring 130,230 Plastic deformation part 131,231 unevenness 133,233 inlay

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16C 43/04 F16C 43/04 (72) Inventor Hikaru Umekita 1578 Higashikaizuka, Iwata-shi, Shizuoka NTT-N Co., Ltd. F-term (Reference) 3J017 AA02 AA05 BA10 CA01 DA10 DB08 HA02 3J101 AA02 AA43 AA54 AA62 AA72 BA53 BA54 BA56 BA64 BA77 DA09 DA16 FA15 FA53 GA02

Claims (4)

[Claims] 1. A hub wheel and a double row bearing are unitized,
In a wheel bearing device in which an outer joint member of a constant velocity universal joint is internally fitted to the hub wheel or the inner ring of the bearing via a torque transmitting means, at least one inner race of the inner races of the double-row bearing is defined as the inner race. It is formed on a separate inner ring that is fitted to the hub wheel, and unevenness is formed on one of the fitting surfaces of the hub ring or the inner ring, and the other fitting surface is made to bite into the unevenness and the hub wheel and A bearing device for a wheel, wherein the inner ring and the inner ring are coupled by plastic deformation. 2. The inlay is formed between the inner diameter of any one of the hub wheel and the inner ring, which is disposed inside, and the outer diameter of the outer joint member. Wheel bearing device. 3. A hub wheel and a double row bearing are unitized,
A separate inner ring in which an outer joint member of a constant velocity universal joint is fitted into the hub wheel via a torque transmission means, and at least one inner race of the double row bearings is fitted into the hub wheel. After forming a concavity and convexity on one of the fitting surfaces of the hub ring or the inner ring, and by engaging the other fitting surface in the concavity and convexity to join the hub ring and the inner ring by plastic deformation A method for manufacturing a bearing device for a wheel, characterized in that an inner diameter of the joint portion is cut to a predetermined size to form an inlay with the outer joint member. 4. The hub ring and the inner ring are joined together by plastic deformation, then a serration portion is formed on the inner diameter of the hub ring or the inner ring, and the outer joint member is fitted inside. A method for manufacturing a bearing device for a wheel according to item 1.