JP2602627Y2 - Ball joint - Google Patents

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball joint suitable for mounting a shock absorber or the like for an automobile.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 49-39103 discloses a mounting structure of a shock absorber (a gas spring described in Japanese Utility Model Publication No. 60-28825) for assisting opening and closing of a back door of an automobile, and a shock absorber. As shown in the mounting eye provided on the shock absorber main body,
A ball bearing is rotatably fitted via a bearing housing ".

In this prior art, the bearing housing before mounting is divided into two parts, with the central part in the axial direction (the maximum outer diameter part of the ball bearing) as a dividing plane. At the time of assembly, the split bearing housings are mounted around the ball bearing from the left and right, and then the split surfaces of both split bearing housings are welded and integrated with each other.

[0004]

However, in the prior art, a step of welding the left and right split bearing housings is required, and the assemblability is poor.

It is also conceivable to lubricate the ball bearings by providing a grease reservoir at the inner diameter of the welded joint surface of the left and right split bearing housings and filling it with a certain amount of grease. However, the welding burrs generated due to the welding of the two split bearing housings are protruded from the inner diameter of the welding mating surfaces of the left and right bearing housings. Make it difficult to secure.

An object of the present invention is to improve the assemblability of a bearing housing around a ball bearing.

[0007]

According to the present invention, a part of a circumferential direction is provided.
Bearing housing with a slot that penetrates in the axial direction
A ball bearing is rotatably fitted on the inner circumference of the ring,
This bearing housing is fixed in the mounting eye of the shock absorber
The ball joint described above,
A flange is provided at one end of the housing in the axial direction.
The other end is provided with a retaining ring mounting groove, and the bearing
Ball with the jing expanded by slit widening
Fit around the bearing and
Around the ball bearing due to the elastic restoration behavior of the jing
And keep the bearing housing attached to the shock absorber.
And insert the flange of the bearing housing
Engage with one end surface of the mounting eye, and for mounting the retaining ring
Attach a retaining ring to the groove to expand the diameter of the bearing housing
The side stop is performed by restricting the deformation .

[0008]

According to the present invention, the bearing housing is formed by slitting, so that the bearing housing is fitted around the ball bearing in a state where the diameter of the bearing housing is increased by widening the slit, and the elasticity of the bearing housing is restored. To maintain the mounting around the ball bearing. Then, the bearing housing is inserted into a mounting eye, and a retaining ring is mounted in a retaining ring mounting groove provided at the other end, thereby restricting the housing from expanding in diameter and stopping the side.

Therefore, the bearing housing is not divided into right and left parts, and the divided bearing housings are not welded to each other in an assembling process, so that the assemblability can be improved.

[0010]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
FIG. 3 is a schematic view showing a bearing housing and a retaining ring, and FIG.
Is a schematic diagram showing a mounting support shaft, and FIG. 4 is a schematic diagram showing an example of a mounting structure of a shock absorber.

As shown in FIG. 4, the shock absorber 10 is a known gas spring in which hydraulic oil and high-pressure gas are sealed in a cylinder 11, and is used, for example, for assisting opening / closing of a back door of an automobile, cushioning, and the like. Can be At this time, the shock absorber 10 is attached to the mounting eye 12 fixed to the cylinder 11.
Is supported by a mounting bracket 14 fixed to the vehicle body side by a ball joint 13, and a mounting eye 15 fixed to the piston rod 11 </ b> A is supported by a mounting bracket 17 fixed to the door side by a ball joint 16.

Since the configurations of the ball joints 13 and 16 are the same, the ball joint 13 will be described in detail below as a representative of both.

That is, as shown in FIG. 4, the ball joint 13 is configured such that a ball bearing 22 is rotatably fitted to a mounting eye 12 provided on a cylinder 11 via a bearing housing 21. Then, the ball joint 13 fits the mounting hole 22A provided in the ball bearing 22 to a mounting support shaft 23 fixed to the mounting bracket 14, and forms a support shaft 23 formed by caulking after the fitting. Is held via a washer 24 by the tip bulging portion 23A.

The mounting support shaft 23 is provided with a flange 23B as shown in FIG. 3, and the projection 23C on the inner surface of the flange 23B is inserted into a mounting hole provided in the mounting bracket 14. Is welded to and fixed.

However, in the case of the ball joint 13, as shown in FIGS. 1 and 2A, a slot 31 which penetrates the bearing housing 21 in a part of the circumferential direction in the axial direction.
In addition, a flange 32 is provided at one end of the bearing housing 21 in the axial direction so as to be able to engage with one end of the mounting eye 12, and a retaining ring mounting groove 33 is provided at the other end. Reference numeral 34 in FIG. 2B indicates a retaining ring.

In the ball joint 13, a groove-shaped grease reservoir 35 is provided which is continuous over the entire circumference of the central portion in the axial direction of the inner diameter portion of the bearing housing 21 (the maximum outer diameter portion of the ball bearing 22). .

The operation of this embodiment will be described below.
By providing the slit 31 in the bearing housing 21, the bearing housing 21 is fitted around the ball bearing 22 in a state where the diameter of the bearing housing 21 is increased by widening the slit 31, and the ball is resiliently restored by the bearing housing 21. The mounting is maintained around the bearing 22. Then, the bearing housing 21 is inserted into the mounting eye 12, and a retaining ring 34 is mounted in a retaining ring mounting groove 33 provided at the other end, thereby restricting the housing 21 from expanding in diameter and stopping the side.

Therefore, the bearing housing 21 is not divided into right and left parts, and the divided bearing housings are not welded to each other in an assembling process, so that the assemblability can be improved.

In the ball joint 13,
The volume of the grease reservoir 35 provided on the inner diameter portion of the bearing housing 21 is not reduced by the welding burr in the conventional technology, and a constant volume can always be secured. As a result, constant lubrication performance and product quality can be easily ensured.

After the bearing housing 21 has been assembled to the above-described ball bearing 22, the retaining ring 34 is mounted on the retaining ring mounting groove 33 so that the slot 3 is formed.
The gap 1 may be eliminated. If the gap of the slit 31 is present even after being assembled to the ball bearing 22, the gap can be used as a grease supply path to the grease reservoir 35. On the other hand, when the gap of the slit 31 is not formed by the retaining ring 34 after being assembled to the ball bearing 22, the grease reservoir 35 can be sealed from the outside.

In this embodiment, the bearing housing 21 is made of synthetic resin,
2 was made of metal.

[0022]

As described above, according to the present invention, the assemblability of the bearing housing around the ball bearing can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a bearing housing and a retaining ring.

FIG. 3 is a schematic view showing a mounting support shaft.

FIG. 4 is a schematic view showing an example of a mounting structure of a shock absorber.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shock absorber 12 Mounting eye 13 Ball joint 21 Bearing housing 22 Ball bearing 31 Slotting 32 Flange part 33 Retaining ring mounting groove part 34 Retaining ring

Claims (1)

(57) [Scope of request for utility model registration] 1. A slot split penetrating partly in the circumferential direction in the axial direction.
Ball bearing on the inner periphery of the bearing housing
The bearing housing is fitted with a ring rotatably.
Ball joint which is fixed in the mounting eye of the shock absorber
In the above, a franc is provided at one axial end of the bearing housing.
The bearing housing is provided with a retaining ring mounting groove at the other end, and the bearing housing is enlarged by slotting.
Fit around the ball bearings
The bearing housing has an elastic recovery
The bearing housing is inserted into the mounting eye of the shock absorber, and the flange portion of the bearing housing is connected to one end of the mounting eye.
And a retaining ring in the retaining ring mounting groove.
Mounting, restricting the expansion deformation of the bearing housing
A ball joint characterized by a side stop .