Brake cylinder structure

Abstract

The utility model discloses a brake cylinder structure, and aims to overcome the defects that the structure of a double-piston cylinder structure of an existing brake cylinder structure is complex, and risk points are numerous. The piston comprises a piston body and an oil inlet portion, the piston body comprises an oil pressure adjusting cavity and a piston portion, the oil inlet portion comprises an oil way structure and a shuttle valve, the oil way structure comprises a main oil port, an auxiliary oil port and an oil inlet communicated with the oil pressure adjusting cavity, the shuttle valve is provided with a first inlet, a second inlet and an outlet, and the main oil port is communicated with the first inlet. The auxiliary oil port is communicated with the second inlet, and the oil inlet hole is communicated with an outlet of the shuttle valve. The shuttle valve is used for connecting the auxiliary oil way, after the main oil way loses efficacy, oil enters the brake cylinder through the characteristic that the oil pressure of the auxiliary oil way is higher than that of the main oil way, the brake cylinder is reused, a single piston cylinder structure is achieved, and therefore cost and risk points are reduced.

Description

Technical Field

[0001] The utility model relates to the braking field, and more specifically, to a brake cylinder structure. Background Art

[0002] The brake caliper is an indispensable brake actuator in the friction brake system, and the brake cylinder is the core component of the brake caliper. For the spring-actuated passive caliper, the brake cylinder must not only have the commonly used brake relief function, but also the auxiliary brake relief function.

[0003] The release brake function is used to relieve the spring-acting passive clamp when the normal release brake function fails.

[0004] Today's brake calipers generally use two piston cylinders. The structure of the two piston components is relatively complex, and the number of sealing rings is also greater. The number of risk points increases accordingly, making it easy for problems such as oil leakage to occur.

[0005] Based on the above situation, the present application aims to provide a brake cylinder structure, simplify the existing brake cylinder structure, optimize the structure, and reduce costs while reducing risk points. Summary of the invention

[0006] The utility model overcomes the shortcomings of the existing double-piston cylinder structure of the brake cylinder structure, which has a complex structure and numerous risk points, and provides a brake cylinder structure which has only one cylinder body, a simple structure and fewer risk points.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A brake cylinder structure includes a piston body and an oil inlet part, the piston body includes an oil pressure regulating chamber and a piston part, the oil inlet part includes an oil circuit structure and a shuttle valve, the oil circuit structure includes a main oil port, an auxiliary oil port and an oil inlet hole connected to the oil pressure regulating chamber, the shuttle valve has a first inlet, a second inlet and an outlet, the main oil port is connected to the first inlet, the auxiliary oil port is connected to the second inlet, and the oil inlet hole is connected to the outlet of the shuttle valve.

[0009] The oil pressure regulating chamber of the piston body drives the piston part to work according to the internal oil pressure. The present application realizes the auxiliary braking relief function according to the oil circuit structure. When the external oil circuit of the oil circuit structure is normal, the main oil port is connected to the oil inlet hole to provide oil to the oil pressure regulating chamber. When the external oil circuit fails, the auxiliary oil port supplies oil to the oil inlet hole. Its specific implementation is achieved through a shuttle valve, which selects the connecting outlet, i.e., the inlet of the oil inlet hole, according to the oil pressure difference between the first inlet connected to the main oil port and the second inlet connected to the auxiliary oil port. Through the above structure, regardless of whether the external oil circuit is normal, the brake cylinder can be triggered normally, and the entire device has only one piston part. The main oil port or the auxiliary oil port intervenes to realize the function through the piston part. The structure of the device is simpler, and there is no need to set up multiple piston cylinders. Correspondingly, the reduction of moving parts and the reduction of seals improve the reliability of the device and reduce risk points.

[0010] Preferably, the piston part includes a brake cylinder body, a piston and a push rod assembly, the brake cylinder body and the push rod assembly are slidably connected, a piston is fixedly mounted on the push rod assembly, the piston is slidably connected in the brake cylinder body, the piston is provided with a top surface and a bottom surface, an oil pressure regulating chamber is formed between the top surface and the brake cylinder body, and an elastic member is arranged between the top surface and the bottom wall of the brake cylinder body. The piston structure of the piston part is realized by the oil pressure regulating chamber generating pressure directed to the bottom surface of the brake cylinder body, and after overcoming the elastic force, the piston moves toward the bottom wall of the brake cylinder body, the piston is fixedly connected to the push rod assembly, and the piston drives the push rod assembly to move relative to the brake cylinder body, thereby playing a piston effect.

[0011] Preferably, the cylinder head is sealed and connected to the cylinder assembly and the push rod assembly, and sealing rings are provided between the side walls of the cylinder body and the push rod assembly and between the cylinder body and the cylinder assembly. By means of the structure, oil leakage between the side walls of the cylinder body and the push rod assembly and between the cylinder body and the cylinder assembly is avoided.

[0012] Preferably, a sealing ring is provided between the piston and the side wall of the cylinder assembly. This structure can avoid oil leakage between the piston and the side wall of the cylinder assembly.

[0013] Preferably, the elastic member is a disc spring assembly.

[0014] Preferably, a thread is provided on the side wall of the push rod assembly, and the piston is threadedly connected to the push rod assembly.

[0015] Preferably, the oil circuit structure is arranged on the brake cylinder body.

[0016] Preferably, the oil circuit structure is integrated with the brake cylinder body. The structure reduces the volume of the device.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] A shuttle valve is used to connect the auxiliary oil circuit. When the main oil circuit fails, the oil pressure of the auxiliary oil circuit is used to enter the brake cylinder, and the brake cylinder is reused to achieve a single piston-cylinder structure, thereby reducing costs and reducing risk points. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the oil circuit structure of the utility model;

[0021] In the figure:

[0022] Oil circuit structure 1, main oil port 2, auxiliary oil port 3, oil inlet hole 4, shuttle valve 5, brake cylinder body 6, piston 7, push rod assembly 8, disc spring assembly 9, cylinder cover 10, sealing ring 11. DETAILED DESCRIPTION

[0023] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] In the present disclosure, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present disclosure can be determined according to specific circumstances, and they cannot be understood as limitations on the present disclosure.

[0027] Example:

[0028] A brake cylinder structure, reference Figure 2As shown, it includes a piston body and an oil inlet part, the piston body includes an oil pressure regulating chamber and a piston 7, the oil inlet part includes an oil circuit structure 1 and a shuttle valve 5, the oil circuit structure 1 includes a main oil port 2, an auxiliary oil port 3 and an oil inlet hole 4 connected to the oil pressure regulating chamber, the shuttle valve 5 has a first inlet, a second inlet and an outlet, the main oil port 2 is connected to the first inlet, the auxiliary oil port 3 is connected to the second inlet, and the oil inlet hole 4 is connected to the outlet of the shuttle valve 5. The oil circuit structure 1 is a pipeline connecting the main oil port 2, the auxiliary oil port 3 and the oil inlet hole 4, and the shuttle valve 5 switches the connection between the main oil port 2 and the auxiliary oil port 3 to the oil inlet hole 4.

[0029] Ginseng Figure 1 A cross-sectional view of the brake cylinder is shown.

[0030] The piston 7 part includes a brake cylinder body 6, a piston 7 and a push rod assembly 8, the brake cylinder body 6 and the push rod assembly 8 are slidably connected, the piston 7 is fixedly mounted on the push rod assembly 8, the piston 7 is slidably connected in the brake cylinder body 6, the piston 7 is provided with a top surface and a bottom surface, an oil pressure regulating chamber is formed between the top surface and the brake cylinder body 6, and an elastic member is arranged between the top surface and the bottom wall of the brake cylinder body 6. The piston 7 structure of the piston 7 part is realized by the oil pressure regulating chamber generating pressure directed to the bottom surface of the brake cylinder body 6, after overcoming the elastic force, the piston 7 moves toward the bottom wall direction of the brake cylinder body 6, the piston 7 is fixedly connected to the push rod assembly 8, and the piston 7 drives the push rod assembly 8 to move relative to the brake cylinder body 6, so as to play the effect of the piston 7. Among them, the way in which the push rod assembly 8 is fixedly connected to the piston 7 in some embodiments is: a thread is provided on the side wall of the push rod assembly 8, and the piston 7 is threadedly connected to the push rod assembly 8.

[0031] The piston 7 is sealed to prevent oil from escaping. The seal is a sealing ring. The cylinder head 10 is sealed and connected to the cylinder assembly and the push rod assembly 8. A sealing ring 11 is provided between the side walls of the cylinder body and the push rod assembly 8 and between the cylinder body and the cylinder assembly. The structure prevents oil from leaking between the side walls of the cylinder body and the push rod assembly 8 and between the cylinder body and the cylinder assembly. A sealing ring 11 is provided between the piston 7 and the side walls of the cylinder assembly. The structure prevents oil from leaking between the piston 7 and the side walls of the cylinder assembly. Specifically, the outer wall surface of the piston 7 and the inner and outer wall surfaces of the cylinder head 10 have an annular groove, and the sealing ring 11 is installed in the annular groove.

[0032] In some embodiments, the elastic member is a disc spring assembly 9.

[0033] In some embodiments, the oil circuit structure 1 is disposed on the brake cylinder body 6. Specifically, the oil circuit structure 1 is an integral structure with the brake cylinder body 6. The structure reduces the volume of the device.

[0034] The oil pressure regulating chamber of the piston body drives the piston 7 to work according to the internal oil pressure. The present application realizes the auxiliary braking relief function according to the oil circuit structure 1. When the external oil circuit of the oil circuit structure 1 is normal, the main oil port 2 is connected to the oil inlet hole 4 to provide oil for the oil pressure regulating chamber. When the external oil circuit fails, the auxiliary oil port 3 supplies oil to the oil inlet hole 4. Its specific implementation is realized by the shuttle valve 5. The shuttle valve 5 selects the connecting outlet, that is, the inlet of the oil inlet hole 4, according to the oil pressure difference between the first inlet connected to the main oil port 2 and the second inlet connected to the auxiliary oil port 3. Through the above structure, regardless of whether the external oil circuit is normal, the brake cylinder can be triggered normally, and the entire device has only one piston 7. The main oil port 2 or the auxiliary oil port 3 intervenes to realize the function through the piston 7. The structure of the device is simpler, and there is no need to set up multiple pistons 7 cylinders. Correspondingly, the reduction of moving parts and the reduction of seals improve the reliability of the device and reduce risk points.

[0035] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A brake cylinder structure, characterized in that: It includes a piston body and an oil inlet part, the piston body includes an oil pressure regulating chamber and a piston part, the oil inlet part includes an oil circuit structure and a shuttle valve, the oil circuit structure includes a main oil port, an auxiliary oil port and an oil inlet hole connected to the oil pressure regulating chamber, the shuttle valve has a first inlet, a second inlet and an outlet, the main oil port is connected to the first inlet, the auxiliary oil port is connected to the second inlet, and the oil inlet hole is connected to the outlet of the shuttle valve.

2. A brake cylinder structure according to claim 1, characterized in that: The piston part includes a brake cylinder body, a piston and a push rod assembly. The brake cylinder body and the push rod assembly are slidably connected. A piston is fixedly mounted on the push rod assembly. The piston is slidably connected in the brake cylinder body. The piston is provided with a top surface and a bottom surface. An oil pressure regulating chamber is formed between the top surface and the brake cylinder body. The elastic member is arranged between the top surface and the bottom wall of the brake cylinder body.

3. A brake cylinder structure according to claim 2, characterized in that: The cylinder cover is sealingly connected to the cylinder assembly and the push rod assembly, and sealing rings are arranged between the side walls of the cylinder and the push rod assembly and between the cylinder and the cylinder assembly.

4. A brake cylinder structure according to claim 2 or 3, characterized in that: A sealing ring is arranged between the piston and the side wall of the cylinder assembly.

5. A brake cylinder structure according to claim 2, characterized in that: The elastic member is a disc spring assembly.

6. A brake cylinder structure according to claim 2, characterized in that: The side wall of the push rod assembly is provided with threads, and the piston is threadedly connected to the push rod assembly.

7. A brake cylinder structure according to claim 2, characterized in that: The oil circuit structure is arranged on the brake cylinder body.

8. A brake cylinder structure according to claim 7, characterized in that: The oil circuit structure is an integrated structure with the brake cylinder body.

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