Air chamber of wedge brake

Abstract

The utility model relates to the technical field of automobile braking, and particularly discloses a wedge brake air chamber which comprises a first cylinder body and a second cylinder body, and the first cylinder body and the second cylinder body are closed to form an air cavity. The connecting assembly is arranged at the joint of the first cylinder body and the second cylinder body and comprises an annular groove formed in the side walls of the sides, close to each other, of the first cylinder body and the second cylinder body, an installation ring clamped in the annular groove and used for installing a diaphragm, and a fixing sleeve arranged on the outer wall of the joint of the first cylinder body and the second cylinder body. The wedge type brake air chamber solves the problem that a diaphragm is not convenient to disassemble and assemble due to the fact that the diaphragm is directly fixed through an air chamber shell of a traditional wedge type brake air chamber.

Description

TECHNICAL FIELD

[0001] The application relates to the field of automobile brake technology and discloses a wedge brake air chamber. BACKGROUND

[0002] In an automobile brake system, the function of a brake air chamber is to convert the pressure of compressed air into mechanical force to rotate a brake cam shaft, so that a brake action is realized. Taking a wedge brake air chamber with a diaphragm as an example, when the automobile brakes, air enters the brake air chamber from an air inlet, and the diaphragm is deformed under the action of air pressure, pushes a push rod, drives a brake adjusting arm, rotates a brake cam, and presses brake shoes and friction plates to the brake drum to generate braking.

[0003] In the current wedge brake air chamber, the diaphragm is directly fixed by the air chamber shell to ensure that the diaphragm does not displace during braking, thereby ensuring the stability and reliability of braking. However, in the use process of the wedge brake, the diaphragm is prone to wear or breakage due to excessive pressure and material aging, thereby affecting the braking effect. Moreover, in the subsequent maintenance and repair process of the diaphragm, the diaphragm is inconvenient to disassemble and assemble. Therefore, the wedge brake air chamber is provided to solve the above problems. CONTENT OF THE INVENTION

[0004] The purpose of the utility model is to solve the problem that the diaphragm is inconvenient to disassemble and assemble in the traditional wedge brake air chamber.

[0005] In order to achieve the above purpose, the basic scheme of the utility model provides a wedge brake air chamber, which comprises:

[0006] A first cylinder body and a second cylinder body are closed to form an air cavity.

[0007] A connecting assembly is arranged at the connection of the first cylinder body and the second cylinder body, which comprises a ring groove arranged on the side wall of the first cylinder body and the second cylinder body, a mounting ring arranged in the ring groove and used for mounting the diaphragm, and a fixing sleeve arranged on the outer wall of the connection of the first cylinder body and the second cylinder body.

[0008] Further, a stepped surface is arranged on the side of the air cavity of the ring groove, and the side surface of the mounting ring is engaged with the stepped surface.

[0009] Further, a plurality of limiting grooves are arranged in the bottom of the ring groove, and the mounting ring comprises an outer ring body matched with the ring groove, an inner ring body arranged at one end of the outer ring body and matched with the end of the stepped surface, and limiting blocks arranged on the side wall of the outer ring body and matched with the limiting grooves.

[0010] Further, the limiting recesses located at the side faces of the first cylinder body and the second cylinder body are staggered with each other, and the limiting blocks located at the two sides of the outer ring body are staggered with each other.

[0011] Further, the fixing sleeve comprises end covers located at the side walls of the first cylinder body and the second cylinder body respectively, and a connecting ring arranged between the two end covers and covering the connecting position of the first cylinder body and the second cylinder body.

[0012] Further, the side wall of each end cover is provided with a folded edge covering the side wall of the first cylinder body or the second cylinder body, and a sealing ring is arranged between the folded edge and the first cylinder body or the second cylinder body.

[0013] Further, the first cylinder body comprises a piston cylinder and an adjusting cylinder, the end of the piston cylinder is provided with a connecting seat, and the end of the second cylinder body is provided with a gas hole.

[0014] The principle and effect of the scheme are as follows:

[0015] Compared with the prior art, the diaphragm is fixed by the installation ring, and the installation ring and the diaphragm are fixed by the cooperation of the stepped surface, the limiting recess and the inner ring body and the limiting block, so that the installation and fixation of the installation ring and the diaphragm are achieved, and the sealing performance is maintained after installation. The problem that the diaphragm is directly fixed by the gas chamber shell in the traditional wedge brake gas chamber, which is not convenient for disassembly and assembly, is solved, and the end cover and the connecting ring are arranged to conveniently fix the first cylinder body and the second cylinder body, and ensure the sealing effect of the gas cavity as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 A schematic view of a wedge brake gas chamber is shown;

[0018] Figure 2 A sectional view of a wedge brake gas chamber is shown;

[0019] Figure 3 A sectional view of a wedge brake gas chamber is shown; Figure 2 A part A of the sectional view is enlarged;

[0020] Figure 4 A distribution diagram of the limiting block in the wedge brake gas chamber is shown; DETAILED DESCRIPTION

[0021] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0022] The reference signs in the drawings of the specification include: connecting seat 1, piston cylinder 2, adjusting cylinder 3, second cylinder body 4, fixing sleeve 5, first end cover 501, second end cover 502, connecting ring 503, inner ring body 6, outer ring body 7, first limiting clamping block 8, sealing ring 9, second limiting clamping block 10.

[0023] A wedge brake air chamber, as shown in Figure 1 The connecting assembly is used to connect the first cylinder body and the second cylinder body 4. The first cylinder body includes the piston cylinder 2 and the adjusting cylinder 3, and the piston cylinder 2 and the adjusting cylinder 3 are integrally formed by extrusion. The first cylinder body formed in this way can effectively avoid the problem of uneven outer surface of the first cylinder body caused by welding fixation. The end of the piston cylinder 2 is provided with the connecting seat 1, and the end of the second cylinder body 4 is provided with the air hole. The piston cavity in the piston cylinder 2 is used for the movement of the push rod, the piston and the like. The adjusting cylinder 3 and the second cylinder body 4 are closed to form the air cavity in which the diaphragm can be installed. The ends of the connecting seat 1 and the end of the piston cylinder 2 are formed by the expansion process forming technology, and the connecting ribs are formed on the connected end faces. Compared with the traditional welding process forming, the expansion process is more solid and firm, is not easy to break, and the formed surface is more regular, which is easy for subsequent processing.

[0024] As shown in Figure 2 and Figure 3 The connecting assembly includes the ring groove provided on the side wall of the first cylinder body and the second cylinder body 4 close to each other, the mounting ring fitted in the ring groove and used for mounting the diaphragm, and the fixing sleeve 5 provided on the outer wall of the connecting part of the first cylinder body and the second cylinder body 4. The side close to the air cavity of the ring groove is provided with the stepped surface, and the bottom of the ring groove is provided with a plurality of limiting grooves. The mounting ring includes the outer ring body 7 matched with the ring groove, the inner ring body 6 provided on one end of the outer ring body 7 and matched with the end of the stepped surface, and the first limiting clamping block 8 and the second limiting clamping block 10 provided on the side walls of the outer ring body 7 and matched with the limiting grooves respectively, as shown in Figure 4 The limiting grooves on the side faces of the first cylinder body and the second cylinder body 4 are staggered with each other, and the first limiting clamping block 8 and the second limiting clamping block 10 on the two sides of the outer ring body 7 are staggered with each other, so as to achieve the effect of mounting and limiting the mounting ring and the diaphragm. The plurality of limiting grooves and the limiting clamping blocks are matched with each other, which can effectively ensure that the diaphragm will not be displaced during braking, so as to ensure the stability and reliability of braking.

[0025] AsFigure 3 As shown, the fixed sleeve 5 includes a first end cover 501, a second end cover 502 located at the first cylinder side wall and the second cylinder 4 side wall respectively, and a connecting ring 503 arranged between the two first end covers 501 and the second end cover 502 and covering the connecting part of the first cylinder and the second cylinder 4, the first end cover 501, the second end cover 502 and the connecting ring 503 are provided with mounting holes and are integrally installed and fixed by bolt fixing, the side wall of the first end cover 501 and the second end cover 502 is provided with a folded edge covering the side wall of the first cylinder or the second cylinder 4, and a sealing ring 9 is arranged between the folded edge and the first cylinder or the second cylinder 4, which can effectively improve the sealing performance of the connecting part of the first cylinder and the second cylinder 4.

[0026] Compared with the prior art, the diaphragm is installed and fixed by the mounting ring, and the mounting ring and the diaphragm are installed and fixed by the mutual cooperation of the stepped surface, the limiting groove, the inner ring body 6 and the limiting clamping block, so that the mounting ring and the diaphragm are installed and fixed, and good sealing performance is maintained after installation, effectively solving the problem that the diaphragm is directly fixed by the air chamber shell in the traditional wedge brake air chamber, which makes it inconvenient to disassemble and assemble the diaphragm, and the end cover and the connecting ring 503 are arranged, which can conveniently install and fix the first cylinder and the second cylinder 4, and also ensure the sealing effect of the air cavity as a whole.

[0027] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments, as long as they do not deviate from the technical solution of the present application. Any indirect modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A wedge brake chamber, characterized in that The utility model relates to a piston-cylinder assembly, comprising: a first cylinder and a second cylinder, which are closed to form a gas cavity; a connecting assembly arranged at the connecting part of the first cylinder and the second cylinder, comprising a ring groove arranged on the side wall of the first cylinder and the second cylinder, a mounting ring arranged in the ring groove and used for mounting a diaphragm, and a fixing sleeve arranged on the outer wall of the connecting part of the first cylinder and the second cylinder.

2. A wedge brake chamber according to claim 1, characterised in that The ring groove is provided with a stepped surface on the side close to the gas cavity, and the side of the mounting ring is engaged with the stepped surface.

3. A wedge brake chamber according to claim 2, characterised in that The bottom of the ring groove is further provided with a plurality of limiting grooves, and the mounting ring comprises an outer ring body adapted to the ring groove, an inner ring body arranged at one end of the outer ring body and adapted to the end of the stepped surface, and limiting blocks arranged on the side wall of the outer ring body and adapted to the limiting grooves respectively.

4. A wedge brake chamber according to claim 3, wherein, The limiting grooves on the side of the first cylinder and the second cylinder are staggered with each other, and the limiting blocks on the two sides of the outer ring body are staggered with each other.

5. A wedge brake chamber according to claim 1, wherein, The fixing sleeve comprises end covers arranged on the side wall of the first cylinder and the side wall of the second cylinder respectively, and a connecting ring arranged between the two end covers and covering the connecting part of the first cylinder and the second cylinder.

6. A wedge brake chamber according to claim 5, wherein, The side wall of the end cover is provided with a folded edge covering the side wall of the first cylinder or the second cylinder, and a sealing ring is arranged between the folded edge and the first cylinder or the second cylinder.

7. A wedge brake chamber according to claim 1, wherein, The first cylinder comprises a piston cylinder and an adjusting cylinder, the end of the piston cylinder is provided with a connecting seat, and the end of the second cylinder is provided with a gas hole.

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