JPS583928Y2 - Ball joint retaining device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a ball joint retaining device.

Generally, ball joints are as shown in Figure 1.

It is composed of a ball stud 1, a socket 2 for receiving the ball stand 1, and a retaining device 3 provided on the socket 2 for preventing the pole stud 1 received in the socket 2 from coming off.

The retaining device 3 includes a tapered groove 4 formed on the inner periphery of the socket 2 above the maximum diameter part of the ball stand 1, and a groove 4 formed in the tapered groove 4 above the maximum diameter part of the ball stand 1. The stopper ring 5 is also formed to have a small diameter and has a circular cross section with a slit (not shown) formed in a portion thereof so as to be freely variable in the radial direction.

Therefore, in this retaining device 3, the socket 2
A stopper ring 5 is placed in the tapered groove 4 of the ball stand 1, and by pressing the pole stud 1 into the socket 2 while expanding the diameter while pushing down the stopper ring 5, the maximum diameter part of the ball stand 1 is expanded. By passing through the stopper ring 5, the stopper ring 5 is restored to its original diameter, and when a tensile force or rocking force is applied to the ball stand 1, the stopper ring 5 having a circular cross section moves into the socket 2.
The ball stand 1 is wedged between the upper part of the tapered groove 4 and the spherical body of the ball stand 10 to prevent the ball stand 1 from coming off.

However, in the retaining device 3 configured in this way, the stopper ring 5 having a circular cross section, the tapered groove 4, and the spherical body of the ball stand 1 are in line contact, so that during use,
When the tensile force and the rocking force act simultaneously, or when a load is applied to the ball stand 1 in the pulling direction, the stopper ring 5 is pushed downward and expanded below the tapered groove 4.

There was a drawback that the ball stand 1 could fall out.

In view of the above-mentioned drawbacks of the conventional technology, the present invention has been designed to completely engage the pole stud and prevent it from coming off, regardless of the force applied from any direction, against the tangential force of the pole stud. To obtain an inexpensive ball joint retaining device that can be easily operated and does not require special processing on a conventional socket.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in FIGS. 2 to 4.

In the description of these embodiments of the present invention, the same parts as those of the conventional embodiment shown in FIG.

The main difference between the embodiment shown in FIGS. 2 and 3 from the embodiment shown in FIG. □This is the point.

With this configuration, when the stopper ring 5A is inserted into the tapered groove 4 of the socket 2, the stopper ring 5A will be in the state shown by the imaginary line in FIG. 3.

Next, when the ball stand 1 is pushed into the socket 2, the stopper ring 5A expands to the state shown by the dotted line in FIG. Due to the restoring force, the state shown by the solid line in FIG. 3 is reached.

In this state, the stopper ring 5A is in surface contact with the upper wall 4a of the tapered groove 4.

Next, a different embodiment of the present invention shown in FIG. 4 will be explained.

The main difference between the embodiment shown in FIG. 4 and the embodiments shown in FIGS. 2 and 3 is that a step 6 is formed on the tapered groove wall 4a, and this step 6 prevents the ball stand 1 from being pulled out. By making it possible to prevent the stopper ring 5A from falling in the direction in which the ball stand comes off, this structure ensures that the ball stand does not come off no matter what kind of removal load is applied during use. can.

As is clear from the above description, in the present invention, a stopper ring with a rectangular cross section that makes surface contact with the wall surface of the groove is inserted into the tapered groove, so that the stopper ring moves in the direction in which it expands. A large amount of resistance acts on the fall, which has the effects listed in the first order.

(p) It is possible to prevent the stopper ring from lateral shaking (horizontal shaking), and it is possible to prevent the stopper ring from being pulled out stably against the shaking force.

(2) Tensile force and rocking force increase.

(3) Shock release prevents the stopper ring from moving in the expansion direction against loads (tensile force, rocking force).

(4) No matter what load is applied during use, the stopper ring comes into contact with the step formed in the tapered groove wall, and can prevent the stopper ring from moving further in the expanding direction.

Therefore, it is possible to reliably prevent the ball stud from coming off.

(5) It is sufficient to simply replace the stopper ring without any special processing of the socket, and it can also be used with existing ball joints.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional embodiment, Fig. 2 is a sectional view showing an embodiment of the present invention, Fig. 3 is an enlarged Xm view of Fig. 2, and Fig. 4 is a different embodiment of the present invention. It is a sectional view showing an example. 1... Ball stand - 2... Socket, 3...
Removal prevention device, 4... Tapered groove, 5A... Stopper ring-4a... Groove wall, 6... Step portion.

Claims (2)

[Scope of utility model registration request] (1) A ball stand, a socket into which this ball stand fits, a tapered groove formed in the upper inner wall of this socket, and a stopper inserted into this groove to prevent the ball stand inserted into the socket from coming out. 1. A ball joint retaining device comprising a ring, wherein the stopper ring is formed to have a rectangular cross section that makes surface contact with a tapered groove wall. (2) Request for registration of a utility model characterized in that a step is formed on the tapered groove wall, and the step prevents the stopper ring from sliding in the direction in which the ball stand is removed. A ball joint retaining device according to item (1).