Automatic exhaust device for piston press-fitting dust cover

Abstract

The utility model discloses an automatic exhaust device for a piston press-fitting dust cover. The automatic exhaust device for the piston press-fitting dust cover is used for automatically opening the piston dust cover for exhausting in the process that the piston and the piston dust cover are pressed into a cylinder hole, the device is composed of an end cover, a spring seat and an exhaust wedge block, the end cover is arranged at the top end of the piston, the top of the end cover is machined to be of a stepped shaft structure, and the lower step face of the stepped shaft structure makes contact with the top face of the piston. The upper step face of the stepped shaft structure is fixedly connected to the bottom face of a spring seat internally provided with a spring, an exhaust wedge block is arranged beside the spring seat, one end of the spring is connected with the spring seat, the other end of the spring is connected to the upper portion of the exhaust wedge block, and the middle of the exhaust wedge block is rotationally connected to the spring seat through a connecting assembly. And the lower end of the exhaust wedge block is clamped in the annular groove of the piston. According to the utility model, the exhaust wedge is directly used for opening the piston dust cover to realize automatic exhaust, manual exhaust of a teasing needle is avoided, the risk of scratching the piston dust cover is reduced, the efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to an automobile braking system, in particular to an automatic exhaust device for a piston press-fitted dust cover. Background Art

[0002] When the existing piston is pressed, a small amount of gas remains in the piston dust cover, which needs to be manually exhausted with a needle. The exhaust by the needle is easy to scratch the piston dust cover, increasing the quality risk. Utility Model Content

[0003] In order to solve the problems in the background technology, the utility model provides an automatic exhaust device for a piston press-fit dust cover. When the piston is press-fitted, the piston dust cover is blown up and then the exhaust wedge opens the piston dust cover, achieving the effect of brake exhaust after the press-fitting is completed, avoiding the risk of the piston dust cover being scratched due to manual exhaust by picking a needle.

[0004] The technical solution adopted by the utility model is:

[0005] The automatic exhaust device for the piston dust cover is used to automatically open and exhaust the piston dust cover during the process of the piston and the piston dust cover being pressed into the cylinder hole;

[0006] The automatic exhaust device of the piston press-fit dust cover is mainly composed of an end cover, a spring seat and an exhaust wedge block. The end cover is arranged at the top end of the piston, and the top of the end cover is processed into a stepped shaft structure. The lower step surface of the stepped shaft structure is in contact with the top surface of the piston, and the upper step surface of the stepped shaft structure is fixedly connected to the bottom surface of the spring seat with a spring installed inside. An exhaust wedge block is provided on the side of the spring seat, one end of the spring is connected to the spring seat, and the other end of the spring is connected to the upper part of the exhaust wedge block. The middle part of the exhaust wedge block is rotatably connected to the spring seat through a connecting assembly, and the lower end of the exhaust wedge block is stuck in the annular groove of the piston; the middle side wall of the exhaust wedge block is an arc surface, which is convenient for disassembly.

[0007] The lower side wall of the exhaust wedge is an inclined plane, which is used to prop open the piston dust cover after the piston dust cover is blown up to achieve automatic exhaust effect.

[0008] The connecting assembly includes a straight pin and two connecting parts, the two connecting parts are respectively connected to the two sides of the spring seat to form an integrated structure, the exhaust wedge is arranged between the two connecting parts, a straight pin is inserted in the middle of the exhaust wedge, and the two ends of the straight pin are respectively connected to the two connecting parts.

[0009] The spring is arranged perpendicular to the axial direction of the piston.

[0010] The bottom end of the exhaust wedge is provided with a circular chamfer, which is inserted into the annular groove of the piston to prevent the end cover from being separated from the piston during the piston press-fitting process.

[0011] The two connecting pieces are respectively located on both sides of the spring seat and on the same side as the spring.

[0012] The beneficial effects of the present utility model are as follows: the exhaust wedge block is directly used to expand the piston dust cover to achieve automatic exhaust, avoiding manual exhaust with a pick needle, reducing the risk of scratching the piston dust cover, improving production efficiency, and reducing production costs. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the exhaust device of the present utility model.

[0014] Figure 2 It is a schematic diagram of the exhaust structure of the piston press-fitting dust cover in the prior art.

[0015] In the figure: 1, hexagon socket head cap screw; 2, end cover; 3, exhaust wedge block; 4, straight pin; 5, spring seat; 6, spring; 7, piston dust cover; 8, piston; 9, pick needle. Specific Embodiments

[0016] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0017] As Figure 1 shown in a, b and Figure 2 shown, the piston press-fitting dust cover automatic exhaust device is used to automatically expand and exhaust the piston dust cover 7 during the process of pressing the piston 8 and the piston dust cover 7 into the cylinder hole. The piston press-fitting dust cover automatic exhaust device mainly consists of an end cover 2, a spring seat 5 and an exhaust wedge block 3. The end cover 2 is arranged at the top end of the piston 8, the outer wall of the end cover 2 is in contact with the inner wall of the piston 8, the top of the end cover 2 is processed into a stepped shaft structure, the lower step surface of the stepped shaft structure is in contact with the top surface of the piston 8, and the upper step surface of the stepped shaft structure is fixedly connected to the bottom surface of the spring seat 5. The spring seat 5 is fixed by a hexagon socket head cap screw 1. A spring 6 is installed in the spring seat 5. The spring 6 is arranged perpendicular to the axial direction of the piston 8. An exhaust wedge block 3 is arranged beside the spring seat 5.

[0018] Specifically, one end of the spring 6 is connected to the spring seat 5, the other end of the spring 6 is connected to the upper part of the exhaust wedge block 3. The middle part of the exhaust wedge block 3 is rotationally connected to the spring seat 5 through a connecting component. The bottom end of the exhaust wedge block 3 is provided with a circular arc chamfer, and the circular arc chamfer is clamped into the annular groove of the piston 8 to prevent the end cover 2 from separating from the piston 8 during the pressing process of the piston 8. The middle side wall of the exhaust wedge block 3 is an arc surface, and the lower side wall of the exhaust wedge block 3 is an inclined plane, and the inclined plane is used to expand the piston dust cover 7 after the piston dust cover 7 is blown up to achieve the effect of automatic exhaust.

[0019] The connecting component includes a straight pin 4 and two connecting pieces. The two connecting pieces are respectively connected to both sides of the spring seat 5 to form an integral structure. The positions of the two connecting pieces on both sides of the spring seat 5 are on the same side as the spring 6.

[0020] The exhaust wedge block 3 is arranged between two connecting pieces. A straight pin 4 is inserted in the middle of the exhaust wedge block 3. The two ends of the straight pin 4 are respectively connected to the two connecting pieces.

[0021] The assembly and working process of the automatic exhaust device for the piston press-fitting dust cover of the utility model are as follows:

[0022] Before press-fitting the piston 8, cover the end cover 2 on the top of the piston 8, tighten the hexagon socket head cap screw 1 to fix the spring seat 5 on the top surface of the end cover 2. The two ends of the spring 6 are respectively connected to the spring seat 5 and the upper part of the exhaust wedge block 3. The middle part of the exhaust wedge block 3 is connected to the spring seat 5 through the straight pin 4 and the connecting piece. The lower part of the exhaust wedge block 3 is clamped into the annular groove of the piston 8. When the piston 8 is press-fitted, after the piston dust cover 7 is blown out, the inclined plane at the lower part of the exhaust wedge block 3 will expand the piston dust cover 7 for exhaust. After the press-fitting is completed, the effect of automatic exhaust is achieved. Press the upper part of the exhaust wedge block 3 by hand, and the lower part of the exhaust wedge block 3 rotates around the straight pin 4 to expand the piston dust cover 7 to a greater extent. After expansion, the whole device can be removed from the piston 8, avoiding the risk of scratching the piston dust cover 7 caused by manual exhaust with the pick needle 9, improving the production efficiency and reducing the production cost.

Claims

1. An automatic exhaust device for a piston press-fit dust cover, the automatic exhaust device for a piston press-fit dust cover is used to automatically open the piston dust cover (7) to exhaust air during the process of press-fitting the piston (8) and the piston dust cover (7) into the cylinder hole, characterized in that: The piston press-fit dust cover automatic exhaust device mainly consists of an end cover (2), a spring seat (5) and an exhaust wedge (3). The end cover (2) is arranged at the top end of the piston (8). The top of the end cover (2) is processed into a stepped shaft structure. The lower step surface of the stepped shaft structure contacts the top surface of the piston (8). The upper step surface of the stepped shaft structure is fixedly connected to the bottom surface of the spring seat (5) in which a spring (6) is installed. An exhaust wedge (3) is arranged on the side of the spring seat (5). One end of the spring (6) is connected to the spring seat (5), and the other end of the spring (6) is connected to the upper part of the exhaust wedge (3). The middle part of the exhaust wedge (3) is rotatably connected to the spring seat (5) through a connecting assembly. The lower end of the exhaust wedge (3) is clamped in the annular groove of the piston (8).

2. The automatic exhaust device for the piston press-fit dust cover according to claim 1 is characterized in that: The middle side wall of the exhaust wedge (3) is an arc surface.

3. The automatic exhaust device for the piston press-fit dust cover according to claim 1 is characterized in that: The lower side wall of the exhaust wedge (3) is an inclined plane.

4. The automatic exhaust device for the piston press-fit dust cover according to claim 1, characterized in that: The connection assembly comprises a straight pin (4) and two connecting pieces, the two connecting pieces are respectively connected to two sides of the spring seat (5) to form an integrated structure, the exhaust wedge (3) is arranged between the two connecting pieces, the middle of the exhaust wedge (3) is inserted with a straight pin (4), and the two ends of the straight pin (4) are respectively connected to the two connecting pieces.

5. The automatic exhaust device for the piston press-fit dust cover according to claim 1 is characterized in that: The spring (6) is arranged perpendicular to the axial direction of the piston (8).

6. The automatic exhaust device for the piston press-fit dust cover according to claim 1, characterized in that: The bottom end of the exhaust wedge (3) is provided with a circular chamfer, which is inserted into the annular groove of the piston (8) to prevent the end cover (2) from being separated from the piston (8) during the press-fitting process of the piston (8).

7. The automatic exhaust device for the piston press-fit dust cover according to claim 4, characterized in that: The two connecting members are respectively located on two sides of the spring seat (5) and the spring (6) is located on the same side.

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