JPH0472088B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fitting and fixing device for axially fixing the inner ring of a bearing attached to the outer ring of a constant velocity joint.

[Conventional technology]

For example, foil bearings installed on the outer ring of constant velocity joints for automobiles are moving from single-piece bearings to unit bearings in which the inner ring is divided into two rows.

When a unit bearing is employed, a fixing device is required to fix the inner ring in the axial direction to the outer ring of the constant velocity joint, and this fixing device is required to have the following characteristics.

() It is necessary to suppress the movement of the inner ring in the thrust direction and to press the inner ring with strong force so that it does not shift even when the load is applied. Particularly in a type in which the inner rings are divided into two rows, a large pressing force is required because the radical load acts as a force that separates the inner rings from each other.

() The space in the wheel bearing part is narrow, and sometimes it is essential to make the structure more compact in constant velocity joints.

() Must be reliable in preventing loosening even when subjected to vibration or load.

() The structure is simple, the cost is low, and mass production is possible.

[Problem to be solved by the invention]

By the way, the most common conventional means of fixing the bearing inner ring to the outer ring of a constant velocity joint is as follows:
Although tightening with nuts has been considered, there are problems in that the structure and processing are complicated, the assembly is time-consuming, and none of the above-mentioned characteristics requirements can be satisfied.

Therefore, an object of this invention is to solve the above-mentioned problems by being able to obtain a large pressing force against the inner ring, having a simple structure, and preventing loosening.
It is an object of the present invention to provide a device for fitting and fixing a bearing inner ring to an outer ring of a constant velocity joint, which can satisfy all of the characteristics required for fixing the inner ring.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention fits a bearing whose inner ring is divided into two rows onto the outer ring outer diameter of a constant velocity joint integrally formed with a wheel mounting flange. An annular groove is provided on the outer circumferential surface of the outer ring at the end opposite to the pressing direction of the bearing inner ring, and a tapered split ring is fitted into this groove to press the inner ring by the wedge action of the tapered surface when the diameter is reduced. A configuration is adopted in which an outer circumferential ring that maintains a reduced diameter state is fitted on the outside of the tapered split ring.

[Effect]

Insert the bearing into the outer ring of the constant velocity joint until the inner ring, which is divided into two parts, contacts the shoulder of the wheel mounting flange.Next, fit the tapered split ring into the groove. When the diameter is reduced by tightening from the outer periphery, the inner ring is pushed in the axial direction by the wedge action of the tapered surface, and the reduced diameter state of the tapered split ring is maintained by the externally fitted outer ring, which prevents the inner ring from moving in the axial direction. Fix it like this.

〔Example〕

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

As shown in Fig. 1, a constant velocity joint for an automobile wheel has a flange 4a for mounting the wheel integrally formed on the outer circumferential surface of an outer ring 1, and a unit bearing 2 is inserted into the outer diameter of the outer ring 1. One side of the inner ring 3 is received by the shoulder 4 of the flange 4a, and the inner ring 3 is supported by the outer peripheral surface exposed from the unit bearing 2 of the outer ring 1.
A fixing device 5 for pressing and fixing the inner ring 3 to the shoulder 4 is provided at a position opposite to the pressing direction.

The fixing device 5 includes an annular groove 6 provided on the outer circumferential surface of the outer ring 1, a tapered split ring 7 fitted into the groove 6, and a tapered split ring 7 fitted onto the outside of the tapered split ring 7. Outer ring 8 that maintains the reduced diameter state
The groove 6 is formed to reach inside the other side surface of the inner ring 3.

The tapered split ring 7 is formed with a tapered surface 7a on one or both sides, and when the diameter is reduced in the groove 6 by pressure from the outer periphery, the inner ring 3 is pushed in the axial direction by the wedge action of the tapered surface 7a. There are some that are fixed with shoulder 4.

This tapered split ring 7 may be divided into a plurality of parts as shown in FIG. 7, or it may be divided into a plurality of parts as shown in FIG. section is separated.

Further, in order to improve the bendability, notches 7b may be provided at a part of the inner periphery as shown in FIG. 9 or at several locations on the inner periphery as shown in FIG.

The formation of the tapered surface 7a of the taper split ring 7, the number of incorporation into the groove 6, and the combination thereof can be freely selected, and the outer circumferential ring 8 that maintains the reduced diameter state of the taper split ring 7 can also have a different structure. Figures 2 to 6 show some examples of these.

The first example shown in FIG. 2 has a tapered surface 7 on one side.
By fitting the two split rings 7, 7 provided with a into the groove 6, and reducing the diameter of one split ring 7 whose inner side becomes thinner, the inner ring 3 is moved in the axial direction via the other split ring 7. A part of the outer circumferential ring 8 fitted onto the split ring 7 is caulked 8a to maintain the reduced diameter state.

In the second example shown in FIG. 3, the outer ring 8 is different from the first example, and the outer ring 1 and the outer ring 8 in the constant velocity joint are connected with screws 9, and the inner ring 8 of the outer ring 8 is Due to the taper 10 provided on the surface and the outer peripheral surface of the split ring 7, the outer peripheral ring 8
When the split ring 7 is screwed in, the diameter of the split ring 7 is reduced.

In the third example shown in FIG. 4, the screws in the second example are omitted, and the outer circumferential ring 8 is press-fitted in the axial direction, so that the diameter of the split ring 7 is reduced and held by the taper 10.

A fourth example shown in FIG. 5 uses three tapered split rings 7, 7, 7, and forms both sides of the central split ring 7 into a tapered surface 7a, and reduces the diameter of the split ring 7 to form both sides. The inner ring 3 is pressed by being press-fitted between the split rings 7.

A fifth example shown in FIG. 6 is a case where one split ring 7 is used, and a tapered surface 6a that matches the tapered surface 7a of the split ring 7 is provided on the side surface of the groove 6, and the second split ring 7 shown in FIG. The diameter of the split ring 7 is reduced by the outer circumferential ring 8 having the same structure as in the example.

The bearing unit 2 fitted into the outer ring 1 of the constant velocity joint is a ball unit bearing in the illustrated case, but it may also be a tapered unit bearing, and in either case, the inner ring 3 is of a type divided into two rows.

The fitting and fixing device of the present invention has the above-described structure, in which the bearing unit 2 is fitted into the outer ring 1 of the constant velocity joint so that the inner shaft 3 abuts the shoulder 4 of the flange 4a, and then the groove 6 is inserted. Inward taper split ring 7
When the split ring 7 is tightened from the outer periphery to reduce its diameter, the concave groove 6 is formed by the wedge action of the tapered surface 7a.
Press the inner ring 3 in the axial direction using the side surface as a support surface,
When this reduced diameter state of the split ring 7 is maintained by fitting the outer ring 8, the inner ring 3 is sandwiched and fixed between the shoulder 4 and the tapered split ring 7, and is completely restrained in the axial direction. become.

〔effect〕

As described above, according to the present invention, the diameter of the tapered split ring provided in the concave groove of the outer ring of the constant velocity joint and inserted into the concave groove is reduced, and the bearing fitted in the outer ring is Since the inner ring is pressed in the axial direction and the reduced diameter state of the split ring is maintained by the outer ring, the inner ring can be pressed and fixed with strong force, and there is no loosening, resulting in a simple structure. It is compact and satisfies all the characteristics required for fixing the inner ring in a unit bearing of a constant velocity joint for automobiles.

Furthermore, since the inner ring can be pressed and fixed with a strong force, it is possible to use a bearing in which the inner ring is divided into two rows in a constant velocity joint.

Furthermore, it can be easily disassembled by removing the outer ring, and if the bearing or constant velocity joint is damaged, it can be reassembled and used by simply replacing the damaged part.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of use of the fitting and fixing device according to the present invention, FIGS. Each of the figures to FIG. 10 is a front view showing different examples of the tapered split ring. 1... Outer ring, 2... Unit bearing, 3... Inner ring, 4... Shoulder, 5... Fixing device, 6... Concave groove, 7
...Taper split ring, 8...Outer ring.

Claims (1)

[Scope of Claims] 1. A bearing having an inner ring divided into two rows is fitted to the outer ring outer diameter of a constant velocity joint integrally formed with a wheel mounting flange, and the inner ring of the bearing is fitted on the outer circumferential surface of the outer ring of the constant velocity joint. An annular groove is provided at the end opposite to the pressing direction, and a tapered split ring that presses the inner ring by the wedge action of the tapered surface during diameter reduction is fitted into this groove. A device for fitting and fixing the inner ring of a bearing to the outer ring of a constant velocity joint in which an outer circumferential ring that maintains a reduced diameter state is fitted. 2. A device for fitting and fixing a bearing inner ring to an outer ring of a constant velocity joint according to claim 1, wherein a plurality of sets of tapered split rings are fitted into a groove with their tapered surfaces superimposed on each other. 3. The device for fitting and fixing a bearing inner ring to an outer ring of a constant velocity joint according to claim 1, wherein the outer circumferential ring has an inner circumferential surface tapered to reduce the diameter of the tapered split ring. 4. A device for fitting and fixing a bearing inner ring to an outer ring of a constant velocity joint according to claim 1, wherein the tapered split ring has a diameter reducing property by cutting off a part of its outer periphery. 5. A device for fixing a bearing inner ring to an outer ring of a constant velocity joint according to claim 1, wherein the tapered split ring is divided into a plurality of parts.