JP2003054212A - Bearing device for axle and constant velocity joint used in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device for an axle capable of selectively assembling different kinds of constant velocity joints to increase the general-purpose property. SOLUTION: In this bearing device for the axle, a centering part 31 for butting any constant velocity joint 4 among a plurality of kinds of constant velocity joints on a vehicle inner side of a shaft body 3 connected with a hub wheel 1 while they are coaxially centered in common is provided. Consequently, since the constant velocity joint 4 is selected from a plurality of kinds of constant velocity joints and is attached to the vehicle inner side of the hub wheel 1, the bearing device for the axle of different type can be manufactured by merely changing the kind of the constant velocity joint 4 to be attached to increase the general-purpose property.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle bearing device for supporting drive wheels on a vehicle body.

[0002]

2. Description of the Related Art Conventionally, there are various kinds of axle bearing devices used for drive wheels depending on the specifications of the automobile to be used. Basically, as shown in FIG. 8, a hub wheel 80 and a double-row rolling device are basically used. Bearing 81 and constant velocity joint 82
It is configured to include and.

By the way, automobiles are ranked from normal specifications to high-grade specifications even for the same vehicle type. However, since high-grade specifications require quietness, a constant speed is included in the configuration of the bearing device for an axle. Only the joint 82 is different in type.

That is, as the types of the constant velocity joint 82, there are well-known types such as a so-called Rzeppa type and a cross groove joint (CGJ) type.

First, the Rzeppa type, which is shown in FIG. 7, has a structure in which it is difficult to absorb vibrations in the axial direction. Therefore, the Rzeppa type is often used in an axle bearing device used in a normal-spec automobile.

On the other hand, the CGJ type, which is not shown, has a structure that easily absorbs vibrations in the axial direction, so that it is often used in axle bearing devices used in high-grade automobiles.

As described above, conventionally, it has been necessary to prepare two types of bearing devices for an axle used in, for example, an automobile of a certain type, one for a normal specification and one for a high-grade specification.

[0008]

In the above-mentioned conventional example, two types of axle bearing devices to be used for a single object have to be manufactured on separate production lines.
It is pointed out that storage costs are high.

In view of the above circumstances, the present invention employs a structure that allows the constant velocity joints of different types to be selectively assembled in the bearing device for an axle and enhances the versatility.

[0010]

According to a first aspect of the present invention, there is provided a bearing device for an axle as set forth in claim 1, wherein a hub wheel to which a wheel is attached, and a hub wheel disposed on the outer circumference of the hub wheel are provided. A double row rolling bearing that is rotatably supported on the vehicle body and a rotatably united body that is fitted in the center hole of the hub wheel and are required to be selected from various types on the vehicle inner side. A shaft body to which a constant velocity joint selected according to is attached, and centering for abutting the outer ring of the constant velocity joint coaxially from the axial direction on the end surface of the shaft body on the vehicle inner side. Section is provided.

According to a second aspect of the present invention, there is provided a bearing device for an axle, comprising a double row rolling bearing which is arranged on the outer periphery of a hub wheel and rotatably supports the hub wheel with respect to a vehicle body. A shaft body that is integrally rotatably coupled in a state of being fitted in the center hole of the hub wheel, and selected from various types as necessary to the vehicle inner side of the shaft body. A constant velocity joint to be coupled is provided, and a centering portion for abutting the outer ring of the constant velocity joint coaxially from the axial direction is provided on the end surface of the shaft body on the vehicle inner side. The outer ring of the quick joint is formed in a tubular shape penetrating in the axial direction, and the vehicle outer side of the outer ring is provided with a positioning portion that is positioned with respect to the centering portion of the shaft body.

In a third axle bearing device of the present invention, as described in claim 3, in the first or second aspect, the centering portion is in the axial center direction at the outer periphery of the end surface of the shaft body on the vehicle inner side. Is an annular protrusion extending to the.

According to a fourth aspect of the present invention, there is provided a bearing device for an axle according to any one of the first to third aspects,
The outer ring of the constant velocity joint is connected to the shaft body with a bolt so that the outer ring is detachable.

According to a fifth aspect of the present invention, there is provided a bearing device for an axle according to claim 5, wherein
At several places around the circumference on the vehicle inner side end surface of the shaft body,
A screw hole into which the bolt is screwed is provided along the axial direction, and the bolt is provided between the tilt guide grooves provided at several places around the outer ring of the constant velocity joint in the axial direction. And is screwed into the screw hole of the shaft body.

According to a sixth aspect of the present invention, in a constant velocity joint, a hub wheel to which a wheel is attached and a hub wheel which is arranged on the outer periphery of the hub wheel and is rotatable with respect to the vehicle body. With respect to the vehicle inner side of the shaft body of the axle bearing device, which includes a supporting double row rolling bearing and a shaft body that is integrally rotatably coupled in a state of being fitted into the center hole of the hub wheel. An outer ring, which is coupled to and has a tilt guide element for tiltably supporting an input shaft for inputting rotational power to the shaft body, the outer ring having an axial direction. The outer ring is provided with a positioning portion for abutting coaxially with the vehicle inner side end surface of the shaft body in the axial direction. .

In short, according to the present invention, various kinds of constant velocity joints can be arbitrarily attached to the end surface of the shaft body on the vehicle inner side. Moreover, also in this assembly, the outer ring of the constant velocity joint can be surely and easily centered coaxially with respect to the shaft body.

The second structure is limited to the structure having a constant velocity joint in the first structure.

Further, in the third structure, the centering portion is an annular protrusion extending in the axial direction on the outer periphery of the end surface of the shaft body on the vehicle inner side, which facilitates processing.

In the fourth structure, the outer ring of the constant velocity joint is connected to the shaft body with bolts so that the outer ring is detachable. This is preferable because if the constant velocity joint needs to be replaced, the replacement can be easily performed.

Further, in the fifth structure, screw holes into which bolts are screwed are provided at several circumferential positions on the end surface on the vehicle inner side of the shaft body along the axial direction, and The bolt is passed through each of tilting guide grooves provided at several places around the outer ring of the constant velocity joint in the axial direction and then screwed into the screw hole of the shaft body. As a result, the outer ring of the constant velocity joint can be securely attached to the shaft body with the bolts without impairing the functions of the bearing device for an axle and the constant velocity joint.

Further, in the above-mentioned structure of the constant velocity joint,
Since the outer ring has a simple tubular shape, processing is easy.

[0022]

DETAILED DESCRIPTION OF THE INVENTION The details of the present invention will be described below with reference to the embodiments shown in the drawings.

1 to 5 show an embodiment of the present invention. 1 is a longitudinal sectional view of an axle bearing device, FIG.
2 is a vertical cross-sectional view showing a state in which the constant velocity joint and the shaft body are separated from each other in the main part of FIG. 1, and FIG.
(3) A cross-sectional view taken along the line of FIG.
FIG. 5 is a perspective view of the main part of FIG.

The axle bearing device comprises a hub wheel 1, a double row rolling bearing 2, a shaft body 3, and a constant velocity joint 4.

The hub wheel 1 has a hollow structure, and a radially outward flange 11 is formed on the outer peripheral surface of the hub wheel 1 on the vehicle outer side. The area on the vehicle inner side of the flange 11 on the outer peripheral surface of the hub wheel 1 is
In the following double-row rolling bearing 2, the inner ring raceway surface 12 of the group of balls 22 on the vehicle outer side is used. The disc rotor 5 and wheels (not shown) of the disc brake device are applied to the flange 11 and attached by a plurality of bolts 6.

The double-row rolling bearing 2 includes a single outer ring 21 having two rows of raceway grooves, a plurality of balls 22 as rolling elements arranged in two rows, and two crown-shaped cages 23. The inner raceway surface 12 of the hub wheel 1 and the inner raceway surface 32 of the shaft body 3 serve as inner races. Outer ring 2
A radially outward flange 24 is provided at the center of the outer peripheral surface of the shaft 1 in the axial direction, and the flange 24 is attached to the knuckle 8 which is a part of the vehicle body by a bolt 9.

The shaft body 3 is provided with an annular protrusion 31 extending in the axial direction on the outer periphery of the end surface on the vehicle inner side as a centering portion for abutting the outer ring 41 of the constant velocity joint 4 coaxially from the axial direction. To be On the outer peripheral surface of the shaft body 3, the boundary portion between the annular projection 31 and the shaft body 3 is the inner ring raceway surface 32 of the group of balls 22 on the vehicle inner side in the double row rolling bearing 2.

As the constant velocity joint 4, a Rzeppa type constant velocity joint 4A mainly for use in an automobile of a normal specification, and a C for mainly used in an automobile of a high-grade specification.
There are two types of constant velocity joints 4B of GJ type, but in this embodiment, any type is selected and attached as necessary.

Both types of constant velocity joints 4A, 4
B is an outer ring 41A, 41B and an inner ring 42A, 4
2B, a plurality of balls 43A and 43B, and cages 44A and 4
4B is a well-known configuration, but is different in the following points.

In the Rzeppa type constant velocity joint 4A, the tilt guide grooves 45A provided at several circumferential positions on the inner peripheral surface of the outer ring 41A have a curved shape.

One CGJ type constant velocity joint 4B
In the above, the tilt guide grooves 41B provided at several places on the inner peripheral surface of the outer ring 21B have a shape parallel to the axial direction.

Both types of constant velocity joints 4A, 4
The axle shaft 7 is spline-fitted to the inner rings 42A and 42B of B and is prevented from coming off by a retaining ring (reference numeral is omitted).

That is, the Rzeppa type constant velocity joint 4A has a structure that allows the tilting movement of the axle shaft 7, but the CGJ type constant velocity joint 4B does not only perform the tilting movement of the axle shaft 7. It has a structure that allows displacement operation in the axial direction.

Next, an assembling form of each of the above components will be described. First, while inserting the shaft body 3 into the center hole of the hub wheel 1, the double row rolling bearing 2 is mounted on the outer periphery extending over the hub wheel 1 and the constant velocity joint 2. For fitting the hub wheel 1 and the shaft body 3, spline fitting, serration fitting, or the like is used.

Next, the cylindrical portion (see the chain double-dashed line in FIG. 1) previously provided on the free end side of the shaft body 3 is bent outward in the radial direction to the predetermined portion on the vehicle outer side of the hub wheel 1. By caulking, required pressure is applied to the double-row rolling bearing 2. The caulking portion is denoted by reference numeral 13. As a result, the hub wheel 1 and the shaft body 3 are positioned relative to each other in the axial direction.

Thereafter, either the Rzeppa type constant velocity joint 4A or the CGJ type constant velocity joint 4B is selectively attached to the vehicle inner side of the shaft body 3.

This mounting is performed by using the bolt 33, and the constant velocity joint 4A or the constant velocity joint 4B is selectively detachable. That is,
Screw holes 34, into which the bolts 33 are screwed, are provided at several circumferential positions on the end surface of the shaft body 3 on the vehicle inner side, and the bolts 33 are provided in the axial direction, and the bolts 33 are used for the constant velocity joint 4. Of the outer ring 41, which is formed between the tilt guide grooves 45 provided at several places on the circumference of the outer ring 41 through the through hole 35 from the axial direction and is screwed into the screw hole 34 of the shaft body 3. And

The outer ring 41 of the constant velocity joint 4 is centered on the shaft body 3 by aligning the inner peripheral cylindrical surface 36 of the annular projection 31.
And the outer peripheral cylinder 46 of the outer ring 41 on the vehicle outer side are fitted together. The outer peripheral cylindrical surface 46 corresponds to the positioning portion described in the claims.

As described above, according to the axle bearing device of the present embodiment, the two types of constant velocity joints 4A and 4B can be arbitrarily attached to the shaft body 3 by using the bolts 33. Therefore, it is not necessary to bother to manufacture two types of axle bearing devices used for a single object on separate production lines, and versatility can be enhanced.

Furthermore, it is preferable to attach either one of the constant velocity joints 4A and 4B to the shaft body 3, which is preferable because it can be easily performed. Moreover, the annular protrusion 31 is provided on the shaft 3
Since it can be formed only by cutting the end face of
The processing cost can be reduced.

The present invention is not limited to the above embodiment, and various modifications and applications are possible.

(1) In the above embodiment, the free end of the shaft body 3 on the vehicle outer side is crimped, but instead of this,
As shown in FIG. 6, the outer peripheral surface of the free end of the shaft body 3 on the vehicle outer side may be formed as a male screw, and the nut 47 may be screwed and assembled thereto.

(2) In the above-described embodiment, an example in which the constant velocity joint 4 is attached has been shown, but it can be used for the driven wheel even with the constant velocity joint 4 removed.

(3) In the above embodiment, the annular projection 31 is shown as the centering portion of the shaft body 3, but instead of this, FIG.
As shown in, the shaft body 3 is used as a centering portion on the shaft body 3 side.
Of the outer ring 41 by using pins 37 that are driven into the vehicle inner side end face at several places around the circumference and by fitting the pins 37 into the recesses 48 provided on the vehicle outer side end face of the outer ring 41 of the constant velocity joint 4. It may be a structure for taking out.

However, the pin 37 may be a projection integrally formed on the end surface of the shaft body 3 on the vehicle inner side.

[0046]

The bearing device for an axle according to the present invention makes it possible to arbitrarily assemble various kinds of constant velocity joints on the end surface of the shaft body on the vehicle inner side. Axle bearing device used for
Since it is not necessary to bother to manufacture the two types on separate production lines, versatility can be improved and manufacturing / processing costs of the bearing device for an axle can be reduced.

Further, in the bearing device for an axle of the present invention, if a trouble occurs in one of the main body portion of the device and the constant velocity joint with the progress of use, only the relevant portion needs to be replaced, and it is necessary to replace all of them. This is advantageous for reducing running costs such as maintenance costs.

Moreover, in this assembling, the outer peripheral cylindrical portion of the outer ring is simply fitted to the annular projection of the shaft body.
Since it is always possible to center the outer ring of the constant velocity joint coaxially with the shaft body, it is easy and preferable.

In particular, according to the third aspect of the invention, since the annular projection is used as the centering portion of the shaft body, it can be formed only by cutting, and the manufacturing / processing cost can be reduced.

According to the fourth aspect of the invention, the outer ring of the constant velocity joint is connected to the shaft body by means of bolts so that the outer ring is detachable. This is preferable because if the constant velocity joint needs to be replaced, the replacement can be easily performed.

Further, in the invention of claim 5, screw holes into which bolts are screwed are provided at several places on the circumference of the end surface of the shaft body on the vehicle inner side along the axial direction, and The bolt is passed through each of tilting guide grooves provided at several places around the outer ring of the constant velocity joint in the axial direction and then screwed into the screw hole of the shaft body. As a result, the outer ring of the constant velocity joint can be securely attached to the shaft body with the bolts without impairing the functions of the bearing device for an axle and the constant velocity joint.

Further, the constant velocity joint used in the bearing device for an axle according to the invention of claim 6 is easy to manufacture and process because the outer ring has a simple tubular shape.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a bearing device for an axle according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a state where a constant velocity joint and a shaft body are separated from each other in the main part of FIG.

3 is an arrow view of a cross section taken along line (3)-(3) of FIG.

FIG. 4 is a vertical cross-sectional view showing a state in which a constant velocity joint and a shaft are connected to each other in the main part of FIG.

5 is a perspective view of a main part of FIG.

FIG. 6 is a vertical cross-sectional view showing the structure of a vehicle outer side free end of another shaft body.

FIG. 7 is a vertical cross-sectional view showing another positioning means for a constant velocity joint.

FIG. 8 is a vertical cross-sectional view of a conventional axle bearing device.

[Explanation of symbols]

1 hub wheel 3-axis body 4 constant velocity joint 31 Centering part

Claims (6)

[Claims] 1. A hub wheel to which a wheel is attached,
A double-row rolling bearing arranged on the outer periphery of the hub wheel and rotatably supporting the hub wheel with respect to the vehicle body; A shaft body to which a constant velocity joint selected from various types is connected to the vehicle inner side as necessary, and an outer ring of the constant velocity joint is attached to an end surface of the shaft body on the vehicle inner side. A bearing device for an axle, comprising a centering portion for abutting coaxially from the axial direction. 2. A hub wheel to which a wheel is attached,
A double-row rolling bearing that is disposed on the outer periphery of the hub wheel and that rotatably supports the hub wheel with respect to the vehicle body is integrally rotatably coupled in a state of being fitted into a center hole of the hub wheel. A shaft body and a constant velocity joint that is selected from various types as necessary and is coupled to the vehicle inner side of the shaft body, and the end surface on the vehicle inner side of the shaft body is A centering portion is provided for coaxially abutting the outer ring of the constant velocity joint from the axial direction, and the outer ring of the constant velocity joint is formed in a tubular shape penetrating in the axial direction and the outer ring is formed. A bearing device for an axle, wherein a positioning portion that is positioned with respect to the centering portion of the shaft body is provided on the vehicle outer side. 3. The bearing device for an axle according to claim 1 or 2, wherein the centering portion is an annular protrusion extending in the axial direction at the outer periphery of the end surface of the shaft body on the vehicle inner side. Axle bearing device. 4. The bearing device for an axle according to any one of claims 1 to 3, wherein the outer ring of the constant velocity joint is connected to the shaft body with a bolt so as to be detachable. A bearing device for an axle, characterized in that 5. The bearing device for an axle according to claim 4, wherein the shaft body is provided at a plurality of circumferential positions on an end surface on the vehicle inner side of the shaft body.
A screw hole into which the bolt is screwed is provided along the axial direction, and the bolt is provided between the tilt guide grooves provided at several places around the outer ring of the constant velocity joint in the axial direction. A bearing device for an axle, characterized in that the bearing device for an axle is inserted into the screw hole of the shaft body. 6. A hub wheel to which a wheel is attached, a double row rolling bearing arranged on the outer periphery of the hub wheel and rotatably supporting the hub wheel with respect to the vehicle body, and a center hole of the hub wheel. A constant velocity joint that is coupled to a vehicle inner side of the shaft body of an axle bearing device that includes a shaft body that is integrally rotatably coupled in a fitted state, and that rotates with respect to the shaft body. It has an outer ring in which a tilt guide element for tiltably supporting an input shaft for inputting power is housed, and the outer ring is formed in a cylindrical shape penetrating in the axial direction and A constant velocity joint characterized in that a positioning portion is provided at an end portion on the vehicle outer side for coaxially abutting the end surface of the shaft body on the vehicle inner side from the axial direction.