JPH0343463Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a swivel joint.

Conventional technology The idea of sharing parts and reducing costs by changing part of a ball joint to make it a swivel joint has long been known, and swivel joints based on this idea are The structure shown in Figure 2 was used.

That is, conventionally, as shown in FIG.
This is held in the socket E, and the bottom surface of the ball seat D is supported by the end cover G, which is crimped and fixed to the lower end of the socket E, and the cylindrical part C formed at the neck of the ball stud A Generally, an annular bush H is press-fitted between the swing opening F of the socket and the socket on its outer periphery, and a swivel joint structure is formed in which the swing of the ball stud A is regulated by the bush H.

Problems to be Solved by the Invention However, in the conventional swivel joint as described above, the swinging opening F of the socket must have a special shape into which the bush H can be press-fitted, as shown in the second figure. Since it is impossible to share the same socket, and the neck of ball stud A must be cylindrical, the neck of the ball stud is made into an inverted conical surface that tapers toward the spherical part so that the ball stud can swing. Since it cannot be used with a very common ball stud with a ball joint that has a sufficiently large angle, the parts that can be used in common with ball joints are extremely limited, and the cost is therefore surprisingly high. I had the problem of putting it away.

The main purpose of the present invention is to address the above-mentioned conventional problems.

Means for Solving the Problems The present invention forms a recess at the tip of the spherical part of the ball stud, and forms a thin convex part on the bottom of the spherical fitting part of the ball seat to fit into the recess, The end cover, whose outer circumferential portion is caulked and fixed to the socket end and supports the bottom portion of the ball seat, is provided with a downwardly recessed recess at a position facing the convex portion of the ball seat.

Function As described above, the rocking of the ball stud is regulated by the fitting of the concave part provided in the ball stud spherical part with the convex part of the ball seat, which functions as a swivel joint and also allows the ball stud to move in the rocking direction. By applying an excessive force, the thin convex part of the ball seat is crushed and turned downward, and it enters the concave part of the end cover, so that it can be used as a normal ball joint.

Embodiment An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 shows an embodiment of the present invention, in which 1 is a ball stud, 2 is a socket, 3 is a ball seat, 4 is an end cover, and 5 is a dust seal. Spherical part 1 of ball stud for ball joint
The ball seat 3 has a spherical fitting part 31 into which the spherical part 11 of the ball stud 1 is fitted. It is made of synthetic resin and has a protruding protrusion 32 that fits into the recess 12 formed at the tip of the spherical part 11 on the bottom surface of the spherical part 11.

The convex portion 32 has a thinner portion 32a on the lower side, while the end cover 4
A concave portion 41 is formed in the center of the convex portion 32 to face the convex portion 32 and to be recessed downward.

The socket 2 has a structure in which, just like a normal ball joint socket, the socket 2 has a crimped part 21 at the lower end to which the end cover 4 is fixed by crimping, and an opening 22 for swinging the ball stud 1 is formed in the upper part. .

In FIG. 1, reference numeral 6 indicates a lubricating oil groove formed on the sliding surface between the spherical portion 11 of the ball stud 1 and the spherical surface portion 31 of the ball seat 3.

In the above, the ball stud 1 is in a state in which the swinging is restricted because the convex part 32 on the bottom surface of the ball seat 3 fits into the concave part 12 at the tip of the spherical part 11. has a swivel joint function that allows it to slide freely only around its center line.

When an excessive force is applied to the ball stud 1 in the swinging direction, the thin convex portion 32 is crushed by the excessive force, reverses downward, and enters the recess 41 of the end cover 4, and from then on it continues to function as a normal ball jig. Can be used as an int.

In the above embodiment, the shape of the concave portion 12 formed at the tip of the ball stud 1 and the convex portion 32 of the ball seat 3 that fits therein may be a conical shape, a hemispherical shape, etc. relative to the center line of the ball stud. Any shape that can be rotated and in which the convex portion 32 is crushed and reversed downward when an excessive force is applied to the ball stud 1 in the swinging direction can be adopted, and the ball seat can be moved upwardly and downwardly. The present invention is also applicable to a side-divided structure, and the socket 2 is not limited to the shape shown in the drawings, but any shape commonly used as a ball joint socket can be used.

Effects of the invention According to the invention as described above, it is possible to obtain a swivel joint in which the ball stud, socket, end cover, and ball seat can all be used in common with the ball joint, which simplifies parts management and reduces assembly work. It is possible to simplify the process and to significantly reduce costs, which can bring about great practical effects.

In addition, the swivel joint of the present invention can be used as is as a ball joint, and in that case, when assembling parts or assembling the ball joint to a link mechanism, etc., the concave part of the spherical part and the ball seat should be By keeping the ball stud in a state where the protrusions fit together and the ball stud does not tilt, assembly work becomes very easy.After assembly is complete, excessive force is applied to the ball stud in the swinging direction to flip the protrusion downward. This allows it to function as a ball joint, and is extremely effective when used as a ball joint in places where assembly work is difficult, such as in the undercarriage of an automobile.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional one. 1...Ball stud, 2...Socket, 3...
...Ball seat, 4...End cover, 11...
Spherical part, 12... Concave part, 32... Convex part, 41...
recess.

Claims (1)

[Scope of utility model registration request] A ball stud having a spherical part and a concave part formed at the tip of the spherical part; a spherical fitting part into which the spherical part of the ball stud is fitted; and a spherical fitting part on the bottom of the spherical fitting part A ball seat having a thin convex portion that fits into a recess formed at the tip of the part, a socket into which the ball seat is inserted, and a socket which is crimped and fixed to the lower end of the socket and supports the bottom surface of the ball seat. The end cover has a concave portion recessed downward in the center thereof, and the convex portion formed on the ball seat is crushed and reversed downward by excessive force in the swinging direction of the ball stud. A swivel joint that can be fitted into a recess in the center of the end cover.