Multi-sealing automobile brake caliper

Abstract

The utility model relates to a multi-sealing automobile brake caliper which comprises a caliper body, a piston cylinder body is arranged on the caliper body, a piston is inserted into the outlet end of the piston cylinder body, two second annular sealing grooves are formed in the middle of the inner side of the piston cylinder body, and annular sealing rings are inserted into the second annular sealing grooves. A plurality of spherical sealing blocks are arranged between the second annular sealing groove and the outer side face of the annular sealing ring, a plurality of limiting grooves are formed in the outlet end, close to the piston cylinder body, of the second annular sealing groove, the multiple limiting grooves are formed in the inner wall of the piston cylinder body in an annular array mode, and O-shaped sealing blocks are arranged in the limiting grooves. And one end of the O-shaped sealing block is connected with the annular sealing ring through an elastic connecting block. By means of the automobile brake caliper, the situation that the rectangular sealing ring is not prone to elastic failure is avoided, the situation that the piston is prone to slow return or cannot return is avoided, and the service life of the automobile brake caliper and the service life of the sealing ring are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brake calipers, in particular to a multi-sealed automobile brake caliper. Background Art

[0002] Automobile brake calipers are components of the braking system that are used in all cars. The piston is a very important component in the structure of automobile brake calipers. Since the piston needs to move frequently during use, a sealing ring needs to be installed inside the piston cylinder to seal the movement of the piston and prevent leakage of hydraulic oil in the piston cylinder.

[0003] The patent with application number CN202120446423.1 discloses a piston multiple sealing structure of an automobile brake caliper, including a caliper body, on which at least one piston cylinder is arranged, a piston is axially inserted into the open end of the piston cylinder, a first sealing groove and a second sealing groove, and a first sealing ring and a second sealing ring are respectively arranged in the first sealing groove and the second sealing groove.

[0004] In the above-mentioned prior art, when the piston pushes outward, the sealing ring will undergo elastic deformation and reset the piston by its own elasticity. However, the sealing ring is usually made of rubber. After long-term use, it is very easy for its elasticity to fail, causing the piston to return slowly or fail to return. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a multi-sealed automobile brake caliper. The specific technical scheme is as follows:

[0006] A multi-sealed automobile brake caliper includes a caliper body, a piston cylinder body is provided on the caliper body, a piston is inserted into the outlet end of the piston cylinder body, two second annular sealing grooves are provided in the middle of the inner side of the piston cylinder body, an annular sealing ring is inserted into the second annular sealing groove, a plurality of spherical sealing blocks are provided between the outer side surfaces of the second annular sealing groove and the annular sealing ring, a plurality of limiting grooves are provided near the outlet end of the second annular sealing groove, a plurality of limiting grooves are arranged in an annular array on the inner wall of the piston cylinder body, an O-type sealing block is provided in the limiting groove, and one end of the O-type sealing block is connected to the annular sealing ring through an elastic connecting block.

[0007] As an improvement of the above technical solution: a first annular sealing groove is provided at the inner opening end of the piston cylinder, and a dust cover is embedded in the first annular sealing groove.

[0008] As an improvement of the above technical solution: a plurality of spherical sealing blocks are arranged in an annular array in the second annular sealing groove, an annular connecting block is also fixedly connected in the second annular sealing groove, and the plurality of spherical sealing blocks are connected via the annular connecting block.

[0009] As an improvement of the above technical solution: a second annular limit block adapted to the piston is provided at the inner inlet end of the piston cylinder body, a first annular limit block adapted to the piston is provided between the two annular sealing rings, and the first annular limit block and the second annular limit block are both fixedly connected to the inner wall of the piston cylinder body.

[0010] Beneficial effects of the utility model:

[0011] When the piston moves in the piston cylinder, it drives multiple annular sealing rings to be subjected to contraction force. Firstly, the contraction force can be shared by multiple spherical sealing blocks arranged on the outside of the annular sealing rings. Secondly, the contraction force can be shared by multiple elastic connecting blocks and O-type sealing blocks connected to one side of the annular sealing rings. In addition, the annular sealing rings can be reset together by the extrusion elastic force of multiple O-type sealing blocks and spherical sealing blocks, which can make the rectangular sealing rings less prone to elastic failure, avoid the situation where the piston is prone to slow return or failure to return, and extend the service life of the automobile brake caliper and the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the connection structure between the piston cylinder and the annular sealing ring in the utility model;

[0014] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0015] Figure 4 The schematic diagram of the partial three-dimensional structure of the piston cylinder in the utility model is shown in FIG. Figure 1 ;

[0016] Figure 5 It is a schematic diagram of the connection structure between the piston cylinder and the piston in the utility model;

[0017] Figure 6 The schematic diagram of the partial three-dimensional structure of the piston cylinder in the utility model is shown in FIG. Figure 2 .

[0018] Figure numerals: 1, caliper body; 2, piston cylinder; 201, first annular sealing groove; 202, second annular sealing groove; 203, limit groove; 3, piston; 4, dust cover; 5, first annular limit block; 6, annular sealing ring; 61, elastic connecting block; 7, spherical sealing block; 71, annular connecting block; 8, second annular limit block; 9, O-type sealing block. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] Example

[0021] Please refer to Figure 1-Figure 6 A multi-sealed automobile brake caliper includes a caliper body 1, a piston cylinder body 2 is arranged on the caliper body 1, a piston 3 is inserted at the outlet end of the piston cylinder body 2, two second annular sealing grooves 202 are arranged in the middle of the inner side of the piston cylinder body 2, the two second annular sealing grooves 202 are separated by one end, an annular sealing ring 6 is inserted in the second annular sealing groove 202, a plurality of spherical sealing blocks 7 are arranged between the outer side surfaces of the second annular sealing groove 202 and the annular sealing ring 6, a plurality of limiting grooves 203 are arranged at the outlet end of the second annular sealing groove 202 near the piston cylinder body 2, a plurality of limiting grooves 203 are arranged in an annular array on the inner wall of the piston cylinder body 2, an O-type sealing block 9 is arranged in the limiting groove 203, one end of the O-type sealing block 9 is connected to the annular sealing ring 6 through an elastic connecting block 61, and specifically, one end of the O-type sealing block 9 away from the elastic connecting block 61 is connected to the inside of the limiting groove 203.

[0022] In an optional embodiment: a first annular sealing groove 201 is opened at the inner open end of the piston cylinder 2, and a dust cover 4 is embedded in the first annular sealing groove 201. Specifically, the dust cover 4 can adopt the dust cover structure in the application number CN202120446423.1, which mainly prevents external dust from entering the piston cylinder 2 through the piston 3, activates the first sealing effect on the piston cylinder 2 in the caliper structure, and prevents the piston 3 moving in the piston cylinder 2 from being worn. Through multiple annular sealing rings 6, the hydraulic oil can be prevented from flowing out to the outside through the inner open end of the piston cylinder 2, thereby playing a multiple sealing role for the caliper of the present application and providing good protection for it.

[0023] In an optional embodiment: a plurality of spherical sealing blocks 7 are arranged in a ring array in the second annular sealing groove 202, and an annular connecting block 71 is also fixedly connected in the second annular sealing groove 202. The plurality of spherical sealing blocks 7 are connected by the annular connecting block 71, so that the plurality of annular connecting blocks 71 are stably arranged inside the first annular sealing groove 201.

[0024] In an optional embodiment: a second annular limit block 8 adapted to the piston 3 is provided at the inner inlet end of the piston cylinder 2, and a first annular limit block 5 adapted to the piston 3 is provided between the two annular sealing rings 6. The first annular limit block 5 and the second annular limit block 8 are both fixedly connected to the inner wall of the piston cylinder 2. On the one hand, the first annular limit block 5 and the second annular limit block 8 can play a guiding and limiting role on the piston 3, so that the piston 3 can stably perform piston movement inside the piston cylinder 2. On the other hand, it can effectively prevent the hydraulic oil at the inlet end of the piston cylinder 2 from flowing out through the annular sealing ring 6 to the other end of the piston cylinder 2 and leaking out.

[0025] Specifically, when the piston 3 moves in the piston cylinder 2, causing the multiple annular sealing rings 6 to be subjected to a contraction force, the contraction force can be shared by a plurality of spherical sealing blocks 7 arranged on the outside of the annular sealing ring 6, and the contraction force can be shared by a plurality of elastic connecting blocks 61 and O-type sealing blocks 9 connected to one side of the annular sealing ring 6. The annular sealing ring 6 can be reset together by the extrusion elastic force of the multiple O-type sealing blocks 9 and the spherical sealing blocks 7, which can make the rectangular sealing ring less prone to elastic failure, avoid the situation where the piston is prone to slow return or cannot return, and extend the service life of the automobile brake caliper and the sealing ring.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-sealed automobile brake caliper, comprising a caliper body (1), wherein the caliper body (1) is provided with a piston cylinder body (2), wherein a piston (3) is inserted into an outlet end of the piston cylinder body (2), wherein: Two second annular sealing grooves (202) are provided in the middle of the inner side of the piston cylinder body (2), an annular sealing ring (6) is inserted into the second annular sealing groove (202), a plurality of spherical sealing blocks (7) are provided between the outer side surfaces of the second annular sealing groove (202) and the annular sealing ring (6), a plurality of limiting grooves (203) are provided near the outlet end of the second annular sealing groove (202), a plurality of limiting grooves (203) are arranged in an annular array on the inner wall of the piston cylinder body (2), an O-type sealing block (9) is provided in the limiting groove (203), and one end of the O-type sealing block (9) is connected to one side of the annular sealing ring (6) via an elastic connecting block (61).

2. The multi-sealed automobile brake caliper according to claim 1, characterized in that: A first annular sealing groove (201) is provided at the inner opening end of the piston cylinder body (2), and a dust cover (4) is embedded in the first annular sealing groove (201).

3. The multi-sealed automobile brake caliper according to claim 2, characterized in that: A plurality of spherical sealing blocks (7) are arranged in an annular array in the second annular sealing groove (202), an annular connecting block (71) is also fixedly connected in the second annular sealing groove (202), and the plurality of spherical sealing blocks (7) are connected via the annular connecting block (71).

4. The multi-sealed automobile brake caliper according to claim 3, characterized in that: A second annular limit block (8) is provided at the inner inlet end of the piston cylinder (2), a first annular limit block (5) is provided between the two annular sealing rings (6), and the first annular limit block (5) and the second annular limit block (8) are both fixedly connected to the inner wall of the piston cylinder (2).

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