JPH112233A - Rod device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts, to improve workability, and to surely prevent a cover rubber from slip off by forming the cover rubber so that the inside diameter of its opening part is smaller than the outside diameter of a resin made socket part and engaging the opening part of the cover rubber with the outer circumference of the socket. SOLUTION: A central hole on one end side of a cover rubber 7 is fitted around the outer circumference of a stud part 1A so as to be positioned on the axial line of a ball stud 1 by means of a receiving seat 4 arranged on a ball head 2 side in the stud part 1A. The receiving seat 4 also functions for preventing the cover rubber 7 from slip off. In the upper outer circumference of a resin made socket part 5, a counterpart engaging part 5A is formed, and an engaging part 7B formed in the end part, in which the opening part of the cover rubber 7 is partitioned, is engaged with the counterpart engaging part 5A. In addition, the inside diameter of the opening part in the cover rubber 7 is formed to be smaller than the outside diameter of the socket part 5. Therefore, the engaging part 7B is shrunk toward the center when the engaging part 7B is engaged with the counter part engaging part 5A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod device having a ball joint used for a stabilizer of an automobile or the like.

[0002]

2. Description of the Related Art As a conventional rod device, as shown in FIG. 6, a ball head 2 of a ball stud 1 is rotatably held by a resin socket 3, and this socket 3 is a cup-shaped metal socket. Housed in the holding part 100, the two socket holding parts 100 are connected by the metal rod part 101,
One in which the opening of the socket holding portion 100 is covered with a cover rubber 102 is known. The cover rubber 102 has a center hole on one end side and a sling shape having an opening with a diameter larger than that of the center hole on the other end side. Stud part 1A
The stud 1 is positioned on the axis line by a seat 4 provided in the middle or on the ball head 2 side of the stud portion 1A. Further, the opening of the cover rubber 2 is fitted on the outer peripheral side of the socket holding portion 100, and the cover rubber 2
The metal ring 103 is embedded in the end defining the opening, and the socket holder 100 is pressed into the opening.

[0003]

A conventional rod device is:
Parts such as the metal ring 103 for fixing the cover rubber 2 to the socket holding portion 100 are required, and a troublesome mounting operation using such parts is also required.

[0004] Therefore, the present invention reduces the number of parts,
It is an object of the present invention to provide a rod device that can improve workability, can surely prevent the cover rubber from coming off, and reduce the cost as a whole.

[0005]

In order to achieve the above-mentioned object, the present invention provides a ball stud and a resin for rotatably enclosing a ball head of the ball stud and projecting a stud portion of the ball stud from an opening. And a rod having at least one end of the socket, and one end attached to the stud of the ball stud so as to cover the opening of the socket, and the other end defining the opening at the other end is the socket. An annular cover rubber covering the outer periphery of the socket portion, an engagement portion is formed at an end defining an opening of the cover rubber, and an engagement portion of the cover rubber is engaged with the outer periphery of the socket portion. A mating engagement portion is formed, and the inner diameter of the opening is formed smaller than the outer diameter of the socket.

[0006]

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

The embodiment shown in FIG. 1 is a sectional view of a rod device for a stabilizer for connecting a stabilizer rotatably mounted on a vehicle body side of an automobile to a suspension arm side, and uses a ball stud 1. Ball joint 2
Is rotatably held by a resin socket 3, the socket 3 is housed in a cup-shaped resin socket 5, and the two sockets 5 are connected by a resin rod 6, and the opening of the socket 5 is opened. Is covered with a cover rubber 7. Cover rubber 7
Has a center hole on one end and an opening 7A (see FIG. 3) having a larger diameter than the center hole on the other end, and the center hole is formed in the stud portion 1A of the ball stud 1. The stud 1 is positioned on the axis by a receiving seat 4 formed of a nut with a flange provided on the ball head 2 side of the stud portion 1A on the outer periphery. The seat 4 also has a function of preventing the cover rubber 7 from coming off. A mating engaging portion 5A is formed on the outer periphery of the upper portion of the socket portion 5. An engaging portion 7B formed at an end defining an opening 7A of the cover rubber 7 is engaged with the mating engaging portion 5A. It is supposed to.

Since the socket portion 5 is formed of resin, forming the mating engagement portion 5A, which is a circumferential groove, on the upper outer periphery is performed by cutting and engraving the circumferential groove on the metal socket holding portion. It is easier to manufacture and is more cost effective.

FIG. 3 shows only the opening 7A side of the cover rubber 7, and the opening 7A expands by opening the engaging portion 7B outward, and the engaging portion 7B expanded outward tries to return to the center. Elastic force is acting. Therefore, the engagement portion 7
When B is engaged with the mating engaging portion 5A, the engaging portion 7B acts to contract toward the center. That is, the inner diameter of the opening 7 </ b> A of the cover rubber 7 is formed smaller than the outer diameter of the socket 5.

In order to manufacture such a rod device, the ball head 2 of the ball stud 1 is housed in a socket 3, and the assembled product is set in a molding die, for example, an injection molding die, and surrounds the socket 3. In this manner, the resin material for molding the socket portion 5 is injected and molded. At this time, the rod part 6
Are also integrally formed. Next, the cover rubber 7 is attached.

Although the ball head 2 is held rotatably by the socket 3, the ball head 2 is directly held by the socket portion 5.
Can be rotatably held.

FIGS. 4 and 5 show the engagement portion 7 of the cover rubber 7.
B shows another example of the means for engaging the mating portion 5A of the socket portion 5 with the mating engaging portion 5A, and the cover rubber 7 does not come out upward with any of the engaging means.

[0013]

As described above, according to the present invention, since the socket portion is formed of resin, the weight and cost can be reduced, and the mating engagement portion is formed on the resin socket portion. It is also easy to engage the engaging portion of the cover rubber with the mating engaging portion. Further, since the engaging portion is merely fitted into the mating engaging portion, a separate component for attaching the cover rubber is not required.
Further, since the inner diameter of the opening is smaller than the outer diameter of the socket, there is no danger that the cover rubber will come off after the engaging portion is engaged with the mating engaging portion.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a cover rubber engagement portion before engagement.

FIG. 3 is a sectional view of an opening side of a cover rubber.

FIG. 4 is a cross-sectional view showing another example of cover rubber engagement.

FIG. 5 is a sectional view showing still another example of the cover rubber engagement.

FIG. 6 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ball stud 2 Ball head 3 Socket 5 Socket part 6 Rod part 7 Cover rubber 5A Engagement part 7A Opening part 7B Engagement part

Claims (1)

[Claims] 1. A ball stud, a resin socket that rotatably encloses a ball head of the ball stud and projects a stud of the ball stud from an opening, and a rod that has the socket at at least one end. An annular cover rubber, one end of which is attached to the stud portion of the ball stud so as to cover the opening of the socket portion, and the other end defining the opening portion of the other end is covered on the outer periphery of the socket portion. An engaging portion is formed at an end defining an opening of the socket. A mating engaging portion with which an engaging portion of the cover rubber is engaged is formed on the outer periphery of the socket portion, and the inner diameter of the opening is a socket. A rod device formed to be smaller than the outer diameter of the portion.