Brake pump piston assembly with high sealing performance

Abstract

The utility model relates to the technical field of automobile braking, in particular to a brake pump piston assembly with high sealing performance, which comprises a guide sleeve, a piston is slidably connected in the guide sleeve, one side of the piston is fixedly connected with a push rod, and a first sealing ring is sleeved on the outer wall of the piston; the piston is provided with a self-adaptive mechanism, the self-adaptive mechanism comprises sliding grooves and a limiting ring, first magnets are fixedly connected to the interiors of the sliding grooves, second magnets are slidably connected to the middle positions of the interiors of the sliding grooves, the second magnets are jointly and fixedly connected with a pushing ring, and a second sealing ring is fixedly connected to the outer wall of the pushing ring. The piston assembly has the advantages that the problems of abrasion and diameter reduction of the sealing ring caused by long-term use can be effectively solved through a self-adaptive compensation mechanism of the sealing ring, and therefore it is guaranteed that the excellent sealing performance of the piston assembly is kept all the time.

Description

Technical Field

[0001] This utility model relates to the field of automotive braking technology, specifically to a high-sealing brake pump piston assembly. Background Technology

[0002] The master cylinder, also known as the brake master cylinder, is mainly responsible for pushing brake fluid to the various brake calipers to drive the pistons. The piston assembly is a key component of the braking system.

[0003] Pistons are usually fitted with sealing rings, and during long-term operation, the diameter of the sealing rings will shrink due to frictional wear, which will lead to a decrease in sealing performance. Utility Model Content

[0004] The purpose of this invention is to provide a high-sealing brake pump piston assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-sealing brake pump piston assembly, comprising a guide sleeve, a piston slidably connected inside the guide sleeve, a push rod fixedly connected to one side of the piston, and a first sealing ring sleeved on the outer wall of the piston;

[0006] The piston is provided with an adaptive mechanism, which includes a sliding groove and a limiting ring. A first magnet is fixedly connected inside the sliding groove, and a second magnet is slidably connected at the middle position inside the sliding groove. The second magnets are fixedly connected to a pushing ring, and a second sealing ring is fixedly connected to the outer wall of the pushing ring.

[0007] Preferably, the first sealing ring slides against the inner wall of the guide sleeve.

[0008] Preferably, the groove array is formed on the piston, and the limiting ring is fixedly connected to the piston outer wall at a position corresponding to the first sealing ring.

[0009] Preferably, one side of the first sealing ring abuts against the limiting ring, the outer wall of the second sealing ring slides against the inner wall of the guide sleeve, the pushing ring is slidably connected to the piston, and one side of the pushing ring abuts against the other side of the first sealing ring.

[0010] Preferably, one side of the first magnet is set as the south pole, and the second magnet is set as the north pole at the position corresponding to the south pole of the first magnet, and the first magnet is magnetically connected to the corresponding second magnet.

[0011] Compared with the prior art, the beneficial effects of this utility model are: when the piston moves, the adaptive mechanism will be subjected to hydraulic thrust due to the pushing of brake fluid, which will cause the first sealing ring to be deformed under pressure. At this time, the outer diameter of the first sealing ring will increase due to pressure. Through this adaptive compensation mechanism, the problem of sealing ring wear and diameter reduction caused by long-term use can be effectively offset, thereby ensuring that the piston assembly always maintains excellent sealing performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of this utility model.

[0015] In the figure: 1. Guide sleeve; 2. Piston; 3. Push rod; 4. First sealing ring; 5. Adaptive mechanism; 51. Slide groove; 52. Limiting ring; 53. First magnet; 54. Second magnet; 55. Pushing ring; 56. Second sealing ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3 The present invention provides the following technical solution:

[0018] Example 1: A high-sealing brake pump piston assembly includes a guide sleeve 1, a piston 2 slidably connected inside the guide sleeve 1, a push rod 3 fixedly connected to one side of the piston 2, and a first sealing ring 4 sleeved on the outer wall of the piston 2, the first sealing ring 4 slidably abutting against the inner wall of the guide sleeve 1.

[0019] When in use, when the driver presses the brake pedal, the pedal force is transmitted to the push rod 3 and piston 2 through the vehicle's transmission mechanism. The piston 2 moves in the guide sleeve 1, which increases the pressure of the brake fluid in front. The first sealing ring 4 provides a seal for the piston 2. The high-pressure brake fluid is delivered to each brake caliper through the pipeline, thereby pushing the brake caliper piston to move, so that the brake pads contact the brake disc or the brake shoes contact the brake drum, generating friction and achieving vehicle braking.

[0020] Example 2: The technical solution of this example that differs from Example 1 includes: the piston 2 is provided with an adaptive mechanism 5, the adaptive mechanism 5 includes a slide groove 51 and a limiting ring 52, a first magnet 53 is fixedly connected inside the slide groove 51, a second magnet 54 is slidably connected at the middle position inside the slide groove 51, the second magnet 54 is fixedly connected to a pushing ring 55, and a second sealing ring 56 is fixedly connected to the outer wall of the pushing ring 55;

[0021] The slide grooves 51 are arrayed on the piston 2. The limiting ring 52 is fixedly connected to the outer wall of the piston 2 at the position corresponding to the first sealing ring 4. One side of the first sealing ring 4 abuts against the limiting ring 52. The outer wall of the second sealing ring 56 slides against the inner wall of the guide sleeve 1. The pushing ring 55 is slidably connected to the piston 2. One side of the pushing ring 55 abuts against the other side of the first sealing ring 4. One side of the first magnet 53 is set as the south pole. The second magnet 54 is set as the north pole at the position corresponding to the south pole of the first magnet 53. The first magnet 53 is magnetically connected to the corresponding second magnet 54.

[0022] During use, when the piston 2 moves and generates mutual pressure with the brake fluid, the push ring 55 will move towards the first sealing ring 4 due to the pressure. The movement of the push ring 55 will cause the second magnet 54 to separate from the first magnet 53. The movement of the push ring 55 will also drive the second sealing ring 56 to move. When the push ring 55 moves, it will squeeze the first sealing ring 4. The diameter of the first sealing ring 4 will increase due to the pressure, which will increase the friction between the diameter of the first sealing ring 4 and the inner wall of the guide sleeve 1, thus maintaining a high sealing performance between the first sealing ring 4 and the guide sleeve 1. When the piston 2 returns to its original position, the magnetic attraction between the first magnet 53 and the second magnet 54 will cause the second magnet 54 to return to its original position. The second magnet 54 will then drive the push ring 55 to return to its original position. This process can be repeated. Through this adaptive compensation mechanism, the wear and diameter reduction of the first sealing ring 4 caused by long-term use can be effectively offset, thereby ensuring that the piston assembly always maintains excellent sealing performance.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-sealing brake pump piston assembly, comprising a guide sleeve (1), a piston (2) slidably connected inside the guide sleeve (1), a push rod (3) fixedly connected to one side of the piston (2), and a first sealing ring (4) sleeved on the outer wall of the piston (2). Its features are: The piston (2) is provided with an adaptive mechanism (5), which includes a slide groove (51) and a limiting ring (52). A first magnet (53) is fixedly connected inside the slide groove (51), and a second magnet (54) is slidably connected at the middle position inside the slide groove (51). The second magnet (54) is fixedly connected to a push ring (55), and a second sealing ring (56) is fixedly connected to the outer wall of the push ring (55).

2. The high-sealing brake pump piston assembly according to claim 1, characterized in that: The first sealing ring (4) slides against the inner wall of the guide sleeve (1).

3. The high-sealing brake pump piston assembly according to claim 1, characterized in that: The grooves (51) array is formed on the piston (2), and the limiting ring (52) is fixedly connected to the outer wall of the piston (2) at the position corresponding to the first sealing ring (4).

4. The high-sealing brake pump piston assembly according to claim 1, characterized in that: The first sealing ring (4) abuts against the limiting ring (52) on one side, the outer wall of the second sealing ring (56) slides against the inner wall of the guide sleeve (1), the pushing ring (55) is slidably connected to the piston (2), and one side of the pushing ring (55) abuts against the other side of the first sealing ring (4).

5. A high-sealing brake pump piston assembly according to claim 1, characterized in that: The first magnet (53) is set to the south pole on one side, and the second magnet (54) is set to the north pole at the corresponding south pole position of the first magnet (53). The first magnet (53) is magnetically connected to the corresponding second magnet (54).

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