Brake air chamber cylinder body

Abstract

The utility model discloses a brake air chamber cylinder body which comprises a bottom cylinder body, a middle cylinder body and an end cylinder body, a piston opening and an installation stud are arranged on the end cylinder body, a guide sleeve is installed in the end cylinder body, the guide sleeve is fixed with a fastening nut A through an A-type thread part, a push rod penetrates out of a guide cylinder, and the guide cylinder can be replaced after being abraded. The bottom cylinder body, the middle cylinder body and the end cylinder body are all provided with sealing tables and sealing rings, the sealing tables and the sealing rings are connected through the fastening assembly, air tightness is ensured, the reliability and safety of a brake system are improved, and the fastening assembly comprises a fastening long rod, a fastening nut B and a fastening lug table. Cylinder bodies are connected through fastening long rods and nuts, fastening nuts A and fastening nuts B are self-locking nuts, a bonding layer is arranged between sealing tables, a wear-resistant rubber layer is arranged on the inner wall of a guide cylinder, and durability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air chamber cylinder blocks, and specifically relates to a brake air chamber cylinder block. Background Art

[0002] The brake air chamber plays a crucial role in the pneumatic braking system of a vehicle. Its main structure includes a cylinder block and a piston assembly. The air chamber drives the reciprocating motion of the push rod through air pressure, and then controls the action of the braking device to achieve braking of the vehicle. However, there are some defects and problems that need to be solved urgently in the existing brake air chamber cylinder block during actual use;

[0003] First of all, in the existing brake air chamber cylinder block, there is frequent reciprocating friction between the push rod and the inner wall of the end cylinder block. Since the end cylinder block usually directly contacts the push rod, long-term movement will cause the wear of the inner wall of the end cylinder block to intensify. This wear will lead to a decrease in the guiding accuracy of the piston, and then affect the response speed of the braking system and the stability of the braking force. In addition, due to the high air pressure change and braking frequency in the air chamber, the wear problem is particularly prominent in actual applications;

[0004] Secondly, in the existing design, when the end cylinder block is worn or damaged, the entire end cylinder block usually needs to be replaced. This maintenance method not only increases the waste of materials, but also because the connection between the various parts of the cylinder block is complex, the process of disassembly and replacement is time-consuming, resulting in a long downtime of the vehicle, increasing the maintenance cost. Especially for commercial vehicles and heavy machinery and equipment that need to be used frequently, the replacement cost is high and the maintenance is inconvenient, affecting the operation efficiency of the vehicle;

[0005] Therefore, there is an urgent need for an improved brake air chamber cylinder block structure in the prior art. Summary of the Utility Model

[0006] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide an air chamber cylinder block with reduced replacement cost and high reliability.

[0007] The technical solution adopted by the utility model to achieve the above purpose is: a brake air chamber cylinder block, which includes a bottom cylinder block, a middle cylinder block, and an end cylinder block connected in sequence. A piston port is provided on the end cylinder block. On both sides of the piston port on the end cylinder block, mounting studs are fixedly connected. One end of the mounting stud penetrates into the end cylinder block, and an A-type thread portion is provided in the area of the mounting stud located in the end cylinder block. A guide sleeve is provided in the end cylinder block. The guide sleeve includes a mounting portion and a guide cylinder fixedly connected to the mounting portion. The guide cylinder is located in the piston port. A mounting hole is provided on the mounting portion. The A-type thread portion of the mounting stud passes through the mounting hole, and a fastening nut A is threadedly connected to the A-type thread portion.

[0008] In the above technical solution, a bottom sealing platform is fixedly connected to the end of the bottom cylinder block, middle sealing platforms are fixedly connected to both ends of the middle cylinder block, and end sealing platforms are fixedly connected to the ends of the end cylinder block;

[0009] A sealing ring A is provided between the bottom sealing platform and the adjacent middle sealing platform;

[0010] A sealing ring B is provided between the end sealing platform and the adjacent middle sealing platform;

[0011] The end sealing platform and the bottom sealing platform are connected through a fastening assembly.

[0012] In the above technical solution, the fastening assembly includes a fastening long rod, a fastening nut B, and fastening ear platforms. Multiple groups of the fastening ear platforms are fixedly connected to both the end sealing platform and the bottom sealing platform. Each group of the fastening ear platforms is provided with a perforation, and the perforations on the end sealing platform correspond to the perforations on the bottom sealing platform one by one;

[0013] A limiting round platform is fixedly connected to one end of the fastening long rod, and a B-type thread portion is provided at the other end of the fastening long rod;

[0014] The fastening long rod passes through the corresponding two groups of perforations, and the B-type thread portion is threadedly connected with the fastening nut B.

[0015] In the above technical solution, both the fastening nut A and the fastening nut B are self-locking nuts.

[0016] In the above technical solution, an adhesive layer is further provided between the end sealing platform, the middle sealing platform, and the bottom sealing platform;

[0017] The inner wall of the guiding cylinder is provided with a wear-resistant layer.

[0018] In the above technical solution, the bottom cylinder block of the middle cylinder block and the bottom sealing platform are of an integral structure, the middle cylinder block and the middle sealing platform are of an integral structure, and the end cylinder block and the end sealing platform are of an integral structure.

[0019] Advantages of the present utility model:

[0020] 1. A guiding sleeve is installed inside the end cylinder block by using mounting studs. The guiding cylinder in the guiding sleeve is located inside the piston port of the end cylinder block. In this way, the push rod passes through the guiding cylinder and extends outwards. When the push rod performs a linear motion, friction is generated between the push rod and the guiding cylinder. When the piston cylinder is worn due to long-term operation, the piston sleeve can be replaced, avoiding the defect of high replacement cost caused by directly replacing the end cylinder block;

[0021] 2. Each cylinder block part is tightly connected through a sealing table and a sealing ring, ensuring the airtightness inside the air chamber, reducing the risk of gas leakage, and enhancing the reliability and safety of the braking system;

[0022] 3. The end cylinder block and the bottom cylinder block are connected by using a fastening long rod and a fastening nut B, and the middle cylinder block is clamped by the end cylinder block and the bottom cylinder block. In this way, the connection of the end cylinder block, the middle cylinder block, and the bottom cylinder block can be achieved through a set of fastening components, with simple assembly and convenient maintenance or replacement when needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present utility model;

[0024] Figure 2 is a schematic exploded structural diagram of the present utility model;

[0025] Figure 3 is a schematic structural diagram of another angle of the exploded present utility model;

[0026] Figure 4 is a schematic structural diagram of the installation of the guide sleeve in the present utility model;

[0027] Figure 5 is a schematic exploded structural diagram of the guide sleeve in the present utility model.

[0028] In the figure: 100 bottom cylinder block, 101 bottom sealing table, 200 middle cylinder block, 201 middle sealing table, 300 end cylinder block, 301 mounting stud, 302 A-type thread portion, 303 end sealing table, 400 guide sleeve, 401 mounting portion, 402 guide cylinder, 403 fastening nut A, 500 sealing ring A, 600 sealing ring B, 701 fastening long rod, 702 fastening nut B, 703 fastening ear table, 704 B-type thread portion, 705 limiting round table. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0030] Please refer to Figure 1 —5, a braking air chamber cylinder block, comprising a bottom cylinder block 100, a middle cylinder block 200, and an end cylinder block 300 connected in sequence. Among them, a piston port is provided on the end cylinder block 300 for the movement of the push rod, and mounting studs 301 are fixedly connected to both sides of the piston port on the end cylinder block 300. One end of the mounting stud 301 penetrates into the end cylinder block 300, and an A-type thread portion 302 is provided in the area of the mounting stud 301 located in the end cylinder block 300. A guide sleeve 400 is provided in the end cylinder block 300;

[0031] The guide sleeve 400 includes an installation part 401 and a guide cylinder 402 fixedly connected to the installation part 401. The guide cylinder 402 is located inside the piston port. An installation hole is provided on the installation part 401. The A-type threaded part 302 of the installation stud 301 passes through the installation hole, and a fastening nut A403 is threadedly connected to the A-type threaded part 302. In this way, the guide sleeve 400 can be installed inside the end cylinder block 300, and the push rod passes through the guide cylinder 402. When the push rod makes a reciprocating linear motion, friction is generated between the push rod and the guide cylinder 402. After long-term operation, the guide cylinder 402 wears. At this time, only the original guide sleeve 400 needs to be removed and a new guide sleeve 400 can be replaced. In this way, it is avoided that the push rod directly wears against the end cylinder block 300. When replacing, it is not necessary to replace the end cylinder block 300, reducing the replacement cost;

[0032] Furthermore, the end of the above-mentioned bottom cylinder block 100 is integrally and fixedly connected with a bottom sealing platform 101. Both ends of the middle cylinder block 200 are integrally and fixedly connected with middle sealing platforms 201. The end of the end cylinder block 300 is integrally and fixedly connected with an end sealing platform 303. Moreover, a sealing ring A500 is provided between the bottom sealing platform 101 and the adjacent middle sealing platform 201, and a sealing ring B600 is provided between the end sealing platform 303 and the adjacent middle sealing platform 201;

[0033] Moreover, the end sealing platform 303 and the bottom sealing platform 101 are connected through a fastening assembly. In this way, through the tight connection of each cylinder block part through the sealing platform and the sealing ring, the airtightness inside the air chamber is ensured, the risk of gas leakage is reduced, and the reliability and safety of the braking system are improved;

[0034] In addition, the above-mentioned fastening assembly includes a fastening long rod 701, a fastening nut B702, and a fastening ear platform 703. That is, multiple groups of fastening ear platforms 703 are fixedly connected to both the end sealing platform 303 and the bottom sealing platform 101. Each group of fastening ear platforms 703 is provided with a perforation, and the perforations on the end sealing platform 303 correspond one by one to the perforations on the bottom sealing platform 101. One end of the fastening long rod 701 is fixedly connected with a limiting round platform 705, and the other end of the fastening long rod 701 is provided with a B-type threaded part 704. The fastening long rod 701 is passed through the corresponding two groups of perforations, and the B-type threaded part 704 is threadedly connected with a fastening nut B702. In this way, the end cylinder block 300 and the bottom cylinder block 100 can be connected, and the end cylinder block 300 and the bottom cylinder block 100 clamp the middle cylinder block 200. In this way, the connection of the end cylinder block 300, the middle cylinder block 200, and the bottom cylinder block 100 can be realized through one set of fastening assembly, and the assembly is simple;

[0035] Optimally, the fastening nut A403 and the fastening nut B702 in the embodiments are both self-locking nuts to ensure the stability and vibration resistance of the connection. In addition, an adhesive layer is provided between the end sealing table 303, the middle sealing table 201 and the bottom sealing table 101 to further improve the sealing effect and connection strength of the cylinder block. Furthermore, a wear-resistant layer is provided on the inner wall of the guide cylinder 402, and the wear-resistant layer is made of a rubber layer to reduce the frictional loss during the movement of the push rod and improve the durability of the cylinder block.

[0036] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0037] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A brake air chamber cylinder, comprising a bottom cylinder (100), a middle cylinder (200) and an end cylinder (300) connected in sequence, characterized in that: The end cylinder body (300) is provided with a piston port. The end cylinder body (300) is fixedly connected with mounting studs (301) on both sides of the piston port. One end of the mounting stud (301) penetrates into the end cylinder body (300). The mounting stud (301) is provided with an A-type threaded portion (302) in the region where the mounting stud (301) is located in the end cylinder body (300). A guide sleeve (400) is provided in the end cylinder body (300). The guide sleeve (400) comprises a mounting portion (401) and a guide cylinder (402) fixedly connected to the mounting portion (401). The guide cylinder (402) is located in the piston port. The mounting portion (401) is provided with a mounting hole. The A-type threaded portion (302) of the mounting stud (301) passes through the mounting hole. A fastening nut A (403) is threadedly connected to the A-type threaded portion (302).

2. A brake air chamber cylinder according to claim 1, characterized in that: The end of the bottom cylinder (100) is fixedly connected to a bottom sealing platform (101), both ends of the middle cylinder (200) are fixedly connected to a middle sealing platform (201), and the end of the end cylinder (300) is fixedly connected to an end sealing platform (303); A sealing ring A (500) is provided between the bottom sealing platform (101) and the adjacent middle sealing platform (201); A sealing ring B (600) is provided between the end sealing platform (303) and the adjacent middle sealing platform (201); The end sealing platform (303) and the bottom sealing platform (101) are connected via a fastening assembly.

3. A brake air chamber cylinder according to claim 2, characterized in that: The fastening assembly comprises a fastening long rod (701), a fastening nut B (702) and a fastening ear platform (703); a plurality of groups of the fastening ear platforms (703) are fixedly connected to the end sealing platform (303) and the bottom sealing platform (101); each group of the fastening ear platforms (703) is provided with a through hole, and the through holes on the end sealing platform (303) correspond to the through holes on the bottom sealing platform (101) one by one; One end of the fastening long rod (701) is fixedly connected to the limited truncated cone (705), and the other end of the fastening long rod (701) is provided with a B-shaped threaded portion (704); The fastening long rod (701) passes through the corresponding two groups of through holes, and the B-type threaded portion (704) is threadedly connected with the fastening nut B (702).

4. A brake air chamber cylinder according to claim 3, characterized in that: The fastening nut A (403) and the fastening nut B (702) are both self-locking nuts.

5. A brake air chamber cylinder according to claim 4, characterized in that: An adhesive layer is also provided between the end sealing platform (303), the middle sealing platform (201) and the bottom sealing platform (101); The inner wall of the guide cylinder (402) is provided with a wear-resistant layer.

6. A brake air chamber cylinder according to claim 2, characterized in that: The bottom cylinder body (100) of the middle cylinder body (200) and the bottom sealing platform (101) are of an integrated structure, the middle cylinder body (200) and the middle sealing platform (201) are of an integrated structure, and the end cylinder body (300) and the end sealing platform (303) are of an integrated structure.

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