JPH10306811A - Coupling structure for pin body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide coupling structure to couple a pin body with the other member easily, at a low cost, and besides reliably without effecting a cutting work. SOLUTION: In coupling structure for a pin body 110 and the other member, a mounting hole 120 with a bottom through which the pin body 110 is mounted is formed in the other member. A protrusion part is formed on the inner bottom of the mounting hole 120, and the end face of the pin 110 inserted in the mounting hole 120 is pressed against the protrusion part. The end part of the pin body 110 is expanded at the bottom of the mounting hole 120, and the pin body 110 and the other member are integrally intercoupled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for a pin body.

[0002]

2. Description of the Related Art FIG. 6 shows a drum brake of an automobile. The drum brake 200 has a back plate 201
In this case, split shoes 202 are provided, and one end of each of these shoes 202 is in contact with the support 101 of the anchor pin 100. Then, hook pin 11 of anchor pin 100
A return spring 203 is hung between 0 and the shoe-202.

As shown in FIGS. 7 and 8, the anchor pin 100 has a locking pin 110 for locking the return spring 203, a step portion 102 having a larger diameter than the locking pin 110, and a step portion. A support part that is larger in diameter than part 102 and one end of shoe 202 contacts
101, a flange-shaped seating portion 103 for sitting on the back plate 201, a shaft portion 104 inserted into the back plate 201,
It comprises a screw portion 105 into which a nut 204 is screwed.

[0004]

SUMMARY OF THE INVENTION A locking pin 110 having a minimum diameter
Conventionally, is formed by cutting a steel material having the same diameter as the shaft portion 104 by cutting. Therefore, the production becomes complicated, and the cost is increased both in terms of time and material.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and a pin body such as the above-mentioned latching pin 110 can be easily and inexpensively manufactured without cutting. An object of the present invention is to provide a coupling structure that can be securely coupled to another member.

[0006]

As a means for solving the above-mentioned problems, the present invention relates to a connecting structure of a pin body and another member, and a bottomed mounting hole for mounting the pin body on the other member. A projection is provided at the bottom in the mounting hole, the end face of the pin body inserted into the mounting hole is pressed against the projection, and the end of the pin body is expanded at the bottom of the mounting hole, and the pin body is expanded. And a member for integrally connecting the pin member and the other member.

In some cases, a recess is formed in advance on the end face of the pin body, and the recess and the protrusion are pressed. Furthermore, when the protrusion is a sphere housed at the bottom of the mounting hole or a protrusion integrally formed with the bottom surface of the mounting hole, when the extension is formed at the bottom of the mounting hole, When a female screw portion is formed on the inner surface of the pin body and a male screw portion to be screwed with the female screw portion is formed on the peripheral surface of the pin body, a selection portion is formed on the peripheral surface of the extended side end of the pin body. In some cases.

Hereinafter, an embodiment of the present invention will be described with reference to an example of a connecting structure of a retaining pin which is a part of an anchor pin of a drum brake. However, the present invention is also applicable to a connecting structure of other pin bodies. It is what adapts.

[0009]

Embodiment 1 As shown in FIG.
0 and the anchor pin 100 are formed separately from the main body,
A mounting hole 120 is formed at the center of the end face of No. 2. This mounting hole 12
The diameter of 0 is slightly larger than the outer diameter of the hook pin 110, and an expanded portion 121 such as a divergent shape is formed at the bottom. Also,
A steel sphere 130 is housed as a protrusion at the bottom of the mounting hole 120. On the other hand, a concave portion 111 having a curved surface or the like is formed on the end surface of the hook pin 110 on the side to be inserted into the mounting hole 120.

Then, the hooking pin 110 is inserted into the mounting hole 120 from the side where the concave portion 111 is formed, and the concave portion 111 is
Press As a result, the end of the hook pin 110 expands in the extension portion 121, so that the hook pin 110 and the anchor pin
100 Can be combined with the main body. In addition, a structure without the extension part 121 at the bottom of the mounting hole 120, a locking pin
A structure in which the recessed portion 111 is not provided at the end of 110 can also be adopted.

[0011]

Second Embodiment As shown in FIG. 2, instead of the sphere 130, a pointed projection 131 formed integrally with the bottom of the mounting hole 120 by projecting the bottom surface may be employed. . In this case, the concave portion 112 on the end surface of the locking pin 110 also has a protrusion.
It is good to make the shape corresponding to 131.

[0012]

Third Embodiment FIG. 3 shows a female screw 141 formed on the inner surface of a mounting hole 140 and a female screw formed on the peripheral surface of a locking pin 110.
This is a structure in which a male screw portion 113 screwed with 141 is formed. In this case, as shown in FIG.
Since the screwing force with the fixing pin 141 is added, the hooking pin 110 and the anchor pin do not need to be formed at the bottom of the mounting hole 140.
100 The bonding strength with the main body is sufficiently obtained. Moreover, mounting holes 14
At the bottom of 0, since the male screw portion 113 expands and bites into the female screw portion 141, a higher coupling force can be obtained.

[0013]

[Fourth Embodiment] FIG. 5 shows a structure in which a selection portion 114 is formed on the peripheral surface of the end of a locking pin 110. In this case as well, when the selection portion 114 is expanded, it bites into the inner peripheral surface of the mounting hole 140. Therefore, even if the expansion portion is not formed at the bottom of the mounting hole 140, the locking pin 110 and the anchor pin 100 main body can be connected. Is sufficiently obtained.

[0014]

As described above, according to the present invention, the pin body can be securely and easily connected to another member without performing cutting. Therefore, cost can be reduced both in terms of time and material.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of Embodiment 1.

FIG. 2 is an explanatory diagram of a second embodiment.

FIG. 3 is an explanatory diagram of a third embodiment.

FIG. 4 is an explanatory diagram of a third embodiment.

FIG. 5 is an explanatory view of Embodiment 4.

FIG. 6 is an explanatory view of a conventional technique.

FIG. 7 is an explanatory diagram of a conventional technique.

FIG. 8 is an explanatory view of a conventional technique.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Natsuki Kogure 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Nissan Motor Co., Ltd.

Claims (7)

[Claims] 1. A coupling structure between a pin body and another member, wherein a bottomed mounting hole for mounting the pin body to the other member is opened, and a protrusion is provided at a bottom portion in the mounting hole. The end structure of the pin body inserted into the hole is pressed against the protruding portion, and the end of the pin body is expanded at the bottom of the mounting hole, so that the pin body and another member are integrally connected, and the pin body connection structure . 2. The connecting structure of a pin body according to claim 1, wherein a recess is formed in an end surface of the pin body, and the recess is pressed against the projecting portion, and the end of the pin body is located at the bottom of the mounting hole. A connecting structure of a pin body, which is configured to be expanded to integrally connect the pin body and another member. 3. The pin connecting structure according to claim 1, wherein said projecting portion comprises a sphere housed in a bottom of said mounting hole. 4. The pin body coupling structure according to claim 1, wherein said projecting portion comprises a projection integrally formed with a bottom surface of said mounting hole. 5. The pin connection structure according to claim 1, wherein an extension is formed at the bottom of the mounting hole. 6. The pin body coupling structure according to claim 1, wherein a female screw portion is formed on an inner surface of the mounting hole, and the female screw portion is screwed to a peripheral surface of the pin body. A pin structure that forms a male thread. 7. The connecting structure of a pin body according to claim 1, wherein a selection portion is formed on a peripheral surface of an extended end of the pin body.