JPS6339452Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a rod-end bearing device with a dust cover.

[Technical background of the invention and its problems]

Conventionally, a rod end bearing device rotatably supports a ball head 3 of a ball stud 2 in a housing 1, as shown in FIG.
A rubber dust cover 5 is installed between the housing 1 and the shaft portion 4 of the ball stud 2. In this case, an annular groove 6 is formed on the outer periphery of one end of the housing 1, one end of the dust cover 5 is engaged with this groove 6, and the housing is tightened with a stopper 7 such as a set ring or wire. dust cover 5
is fixed.

However, with something like this, the dust cover 5
In order to attach the housing 1, it is necessary to machine an annular groove 6, a stopper 7 is required, and the housing 1 also needs to have sufficient wall thickness, making it large and expensive. .

Furthermore, as shown in FIG. 2, there is a conventional dust cover 8 that surrounds the entire shaft 4 of the ball stud 2 from the outer periphery of the housing 1, but as the dust cover 8 becomes larger, it becomes difficult to manufacture it. This is also troublesome and undesirable.

[Purpose of invention]

The present invention is an attempt to improve the above-mentioned points, and by caulking the opening of the housing, the ball seat and dust cover are fixed at the same time, resulting in good sealing performance and a compact design. The object of the present invention is to provide a rod-end bearing device that is easy to manufacture and has excellent mass productivity.

[Structure of the idea]

(Means for Solving the Problems) The rod end bearing device of the present invention includes a housing 1 having an inner chamber 12 having an opening 13 at one end.
1, a ball stud 16 having a ball head 17 disposed in the inner chamber 12 of the housing 11, and a shaft portion 18 connected to the ball head 17 and extending from the opening 13 at one end of the housing 11. , a cylindrical ball seat 21 with one end open and interposed between the wall surface of the inner chamber 12 of the housing 11 and the outer surface of the ball head 17 of the ball stud 16; and the shaft of the housing 11 and the ball stud 16. An annular recess 26 is formed at the outer periphery of the opening at one end of the ball seat 21, and an inner periphery at one end of the dust cover 27 is formed in the recess 26. The annular protrusion 28 formed in the housing 11 is fitted, and the deformation of the opening 13 of the housing 11 causes the entire circumference of the opening at one end of the ball seat 21 and the protrusion 28 of the dust cover 27 to be fitted.
The entire outer circumference of the holder is pressed and fixed.

(Function) In the present invention, by caulking the opening 13 of the housing 11, the entire circumference of the opening at one end of the ball seat 21 is pressed against the ball seat 21, and the ball seat 21 is fixed. 11 and the recess 26 of the ball seat 21, and the ball seat 21 and the dust cover 27 are fixed at the same time.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

Reference numeral 11 denotes a metal housing, and this housing 11 has an almost cylindrical inner chamber 12 with a bottom formed therein, an opening 13 formed at one end of this inner chamber 12, and an opening 13 on the outer periphery of this opening 13. Thin caulking part 1
4 is formed. Further, a screw shaft 15 is integrally provided on one side of the housing 11.

16 is a metal ball stud, and this ball stud 16 has a ball head 17 at one end, a shaft portion 18 is integrally connected to the ball head 17, and a flange portion is provided at the tip of this shaft portion 18. A threaded portion 20 is provided via 19. A ball head 17 is disposed within the inner chamber 12 of the housing 11, and a shaft portion 18 extends from the opening 13 at one end of the housing 11.

Reference numeral 21 denotes a ball seat made of soft synthetic resin that is interposed between the wall surface of the inner chamber 12 of the housing 11 and the outer surface of the ball head 17 of the ball stud 16. It has a cylindrical inner wall surface 22 that is in contact with the wall surface of the inner chamber 12 of the ball stud 16, and has an opening 23 at one end on the inner periphery with a diameter smaller than the diameter of the ball head 17 of the ball stud 16. It has a wall surface 24, and the spherical head 17 is located in the middle of this inner wall surface 24.
It has a spherical support surface 25 in contact with the outer surface of. Further, an annular recess 26 is formed at the outer periphery of the opening 23 of the ball seat 21 .

Reference numeral 27 denotes a substantially cylindrical dust cover made of an elastic material such as rubber, and an annular protrusion 28 that fits into the recess 26 of the ball seat 21 is formed on the inner periphery of one end of the dust cover 27. ,
The shaft portion 18 of the ball stud 16 is attached to the inner peripheral portion of the other end.
A lip portion 29 is formed which comes into contact with the outer circumferential surface of.

Then, when assembling, ball seat 2
The ball head 17 of the ball stud 16 is press-fitted into the ball stud 1, and the ball head 17 is rotatably brought into contact with the spherical support surface 25 of the ball seat 21. Also, the protrusion 28 of the dust cover 27 is connected to the recess 2 of the ball seat 21.
At the same time, the lip part 29 of the dust cover 27 is fitted to the outer periphery of the shaft part 18 of the ball stud 16.

In this state, the assembled parts are press-fitted into the inner chamber 12 of the housing 11, and further, the caulking part 14 at one end of the housing 11 is deformed and caulked inward by the conical head 30, and the opening 2 of the ball seat 21 is
3 and the entire circumference of the protrusion 28 of the dust cover 27 are caulked and fixed at the same time.

In addition, in order to prevent excessive deformation of the caulking part 14 due to an error in the dimensions of the housing 11 during caulking, the wall thickness between the outer diameter of the recess 26 of the ball seat 21 and the inner diameter of the opening 23 should be adjusted appropriately, for example. about
By keeping it at 1.5 mm, the ball seat 21 is deformed in the direction of the central axis, and the holding preload of the dust cover 27 is relaxed, thereby preventing damage to the holding portion of the dust cover 27 in the ball seat 21. .

Note that the recess 26 into which the protrusion 28 of the dust cover 27 of the ball seat 21 is fitted may be formed in a groove shape or in a cylindrical shape with the same diameter as the groove diameter and open at one end.

[Effect of idea]

According to the present invention, by deforming the opening of the housing, the ball seat and the dust cover can be fixed at the same time, good sealing performance can be maintained, and the wall thickness of the housing can be particularly thickened. Moreover, since the ball seat and the dust cover are fixed at the same time by deforming the housing, work efficiency is improved, mass production is improved, and the cost can be reduced.

[Brief explanation of the drawing]

1 and 2 are sectional views of a conventional device, FIG. 3 is a sectional view showing an embodiment of the device of the present invention, and FIG. 4 is a sectional view showing its assembled state. 11...Housing, 12...Inner room, 13...
Opening, 16... Ball stud, 17... Ball head, 18... Shaft, 21... Ball seat, 26...
... recess, 27 ... dust cover, 28 ... protrusion.

Claims (1)

[Claims for Utility Model Registration] A housing having an inner chamber having an opening at one end, a ball head disposed in the inner chamber of the housing, and an opening at one end of the housing connected to the ball head. a ball stud having a shaft extending from the housing; a cylindrical ball seat with one end open and interposed between the inner wall of the housing and the outer surface of the ball head of the ball stud; a dust cover provided between the outer side of the shaft portion of the ball stud, an annular recess formed in the outer periphery of the opening at one end of the ball seat, and an annular recess formed in the inner periphery of the one end of the dust cover in the recess; fitting the annular protrusion, and
A rod end bearing device characterized in that the entire circumference of the opening at one end of the ball seat and the entire outer circumference of the protrusion of the dust cover are pressed and fixed by deformation of the opening of the housing.