JPH04133016U - ball joint - Google Patents

Abstract

(57) [Summary] [Purpose] Reduce the pressing force on the ball seat that occurs when caulking the opening of the housing, suppress the increase in operating resistance of the ball stud, and reduce the swinging rotation of the ball stud. Even if the ball seat hardens and the repulsive force decreases due to heat generated by the ball or long-term use, the amount of displacement in the axial direction of the ball stud is maintained within a predetermined range. [Structure] The tapered inner tapered surface that connects the inner peripheral wall surface and the inner bottom surface of the housing is brought into contact with the tapered outer tapered surface that connects the outer peripheral wall surface and the outer bottom surface of the ball seat, and the inner bottom surface and the outer A gap is formed between the base and the bottom surface.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is a ball joint used for example in automobile suspension systems and steering systems. Regarding

0002

[Conventional technology]

Conventionally, ball studs have a ball head at the tip of the handle, and the ball head can swing freely. A cup-shaped ball seat that is held in place, and a housing that encloses the ball seat and fits tightly As a ball joint consisting of a ring, there are There are many such as those shown in No. 63-74516 and Utility Model Application Publication No. 3-1314.

0003

[Problem that this invention attempts to solve]

In the above-mentioned ball joint, the ball head of the ball stud is surrounded by a ▼Since the housing encloses the cup-shaped ball seat and fits tightly, the When caulking the rear housing opening, the ball seat is pressed and the ball star There is a problem that the operating resistance of the head increases.

0004 In order to solve this problem, as shown in FIG. 4 and the inner bottom surface 116, and the ball seat 105. Between the tapered outer tapered surface 112 connecting the outer peripheral wall surface 111 and the outer bottom surface 113 of There is a ball joint 101 with a gap 117 formed therein. This allows housing 1 Pressure on the ball seat 105 that occurs when caulking the opening 109 of 06 The force is reduced by pushing the ball seat 105 into the gap 117, and the ball An increase in the operating resistance of Rustad 102 is suppressed.

[0005] However, the inner tapered surface 115 of the housing 106 and the outer tapered surface of the ball seat 105 If a gap 117 is formed between the pad surface 112, the following problems will occur.

[0006] In other words, the ball seat 105 is used for caulking of the opening 109 of the housing 106. As a result, a repulsive force is applied in the axial direction of the ball stud. This repulsion force The ball seat 105 may be damaged due to heat generated by the rocking rotation of the tad 102 or long-term use. is hardened and reduced. Here, the force applied in the direction of the ball stud axis is The ball seat 105 can be easily pressed and moved into the gap 117, and the ball stud 1 A problem arises in that the amount of displacement in the axial direction of 02 becomes larger than a predetermined amount.

[0007] The purpose of this invention is to solve these problems and create a ball joint that can be used for a long time. The goal is to provide insight.

[0008]

[Means to solve the problem]

The present invention has the following configuration.

[0009] A tapered inner tapered surface connecting the inner circumferential wall surface and the inner bottom surface of the housing and a ball seat The tapered outer tapered surface connecting the outer peripheral wall surface and the outer bottom surface of the A gap is formed between the inner bottom surface and the outer bottom surface.

0010

【Example】

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

[0011] Figure 1 shows the assembled ball joint 1, with a spherical head at one end of the ball stud 2. The part 4 is held in the inner cavity 18 of the housing 6 through the ball seat 5 so as to be able to swing freely. At the same time, the handle 3 at the other end protrudes from the opening 7 of the housing 6.

0012 The cup-shaped ball seat 5 has an inner surface with approximately the same diameter as the ball head 4 of the ball stud 2. It has an inner spherical surface 19 which is a spherical surface, and an outer peripheral wall surface 11 and a bottom whose outer surface represents the outer periphery of the cylindrical part. It has an outer bottom surface 13 representing a surface and a tapered outer tapered surface 12 connecting therebetween. Also ha The housing 6 includes an outer peripheral wall surface 11, an outer tapered surface 12, and an outer bottom surface 1 of the ball seat 5. Comprised of an inner circumferential wall surface 14, an inner tapered surface 15, and an inner bottom surface 16, which face 3 and have substantially the same shape. It has a lumen part 18. Ball stud on outer tapered surface 12 of ball seat 5 The axial distance is the ball stud axis direction on the inner tapered surface 15 of the housing 6. The distance between the outer bottom surface 13 of the ball seat 5 and the inner bottom surface 16 of the housing 6 is A gap 17 is formed therebetween.

[0013] A circumferential shoulder 10 is formed on the inner periphery of the housing 6 near the opening 7, and the shoulder 1 0 is provided with a retaining ring 8 to prevent the ball portion 4 of the ball stud 2 from coming off. Then, the opening 9 of the housing 6 is caulked and fixed.

[0014] Next, the assembly of the ball joint 1 as described above will be explained based on FIG. .

[0015] First, a ball stud surrounded by a ball seat 5 is placed inside the housing 6. Insert the ball head 4 of No. 2. Next, attach the retaining ring 8 to the opening 7 of the housing 6. installed on a circumferential shoulder 10 formed on the inner periphery of the The parts are caulked and fixed to complete the process as shown in Fig. 1. This ball joint 1 is When the opening 9 of the housing 6 is caulked, the ball seat 5 is attached to the inner bottom of the housing 6. The ball is pressed in the 16 directions and enters the gap 17 slightly, and the ball stud gives a repulsive force in the axial direction.

[0016] Therefore, the inner tapered surface 15 of the housing 6 and the outer taper 12 of the ball seat 5 are Since the ball stud comes into contact with the ball stud and receives a repulsive force in the axial direction, the ball seat 5's ball The amount of displacement in the axial direction of the stud can be reduced.

[0017]

【effect】

A tapered inner tapered surface connecting the inner circumferential wall surface and the inner bottom surface of the housing and a ball seat The tapered outer tapered surface connecting the outer peripheral wall surface and the outer bottom surface of the Since a gap was formed between the inner and outer bottom surfaces, the opening of the housing was caulked. The pressing force on the ball seat that occurs when the ball seat is pressed moves into the gap. As a result, the increase in operating resistance of the ball stud can be suppressed. Also, ha The repulsion force generated when caulking the opening of the uzing causes the ball seat to bulge. The amount of displacement in the axial direction of the ball stud is determined by the inner tapered surface of the housing and the ball seat. Since it is in contact with the outer tapered surface, it is suppressed to be small. Therefore, the ball stud The ball seat hardens due to the heat generated by rocking rotation and long-term use, reducing the repulsive force. Even if the ball stud is moved in the axial direction, the amount of displacement in the axial direction can be maintained within a predetermined range.

[Brief explanation of drawings]

FIG. 1 is a partially sectional plan view showing a ball joint according to an embodiment of the present invention.

FIG. 2 is a partially sectional plan view illustrating an assembly process of a ball joint according to an embodiment of the present invention.

FIG. 3 is a partially sectional plan view showing a conventional ball joint.

[Explanation of symbols]

2 ball stud 3 Handle 4 Ball head 5 Ball seat 6 Housing 7 Aperture 11 Outer wall surface 12 Outer tapered surface 13 Outer bottom surface 14 Inner peripheral wall surface 15 Inner tapered surface 16 Inner bottom surface 17 Gap

Claims (1)

[Scope of utility model registration request] 1. A ball stud (2) having a ball head (4) at the tip of a handle (3), and a cup-shaped ball seat (2) that swingably holds the ball head (4). 5), and a housing (6) that encloses the ball seat (5) and allows the handle (3) of the ball stud (2) to protrude from the opening (7). A tapered inner tapered surface (15) connecting the peripheral wall surface (14) and the inner bottom surface (16), and a tapered outer surface connecting the outer peripheral wall surface (11) and the outer bottom surface (13) of the ball seat (5). While making contact with the tapered surface (12),
There is a gap (1) between the inner bottom surface (16) and the outer bottom surface (13).
7) A ball joint characterized by forming.