Novel compensation hole structure

Abstract

The utility model provides a novel compensation hole structure which comprises an oil passing hole formed in the front end of a brake master cylinder body, and one side of the oil passing hole is communicated with a liquid inlet cavity of an oil cup assembly; and the compensation hole is arranged in the oil passing hole and the brake master cylinder body and between the pressure cavity for the first piston assembly to stretch out and draw back in a penetrating manner. According to the utility model, the collision of the cylinder body of the brake master cylinder is reduced, and the risk of breaking the cylinder body is reduced, so that the risks of brake oil leakage and brake failure are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compensating hole processing, in particular to a novel compensating hole structure. Background Art

[0002] The brake master cylinder currently on the market mainly includes an oil cup assembly, a first piston assembly, a second piston assembly, a brake master cylinder body, a pressure chamber and a compensation hole structure.

[0003] When the brake pedal is released, the piston assembly returns to its initial state, and the brake fluid in the oil cup assembly is replenished into the pressure chamber through the compensation hole, which then needs to be sealed. The existing structure is to machine the compensation hole on the outside of the brake master cylinder body, and use riveted steel balls for sealing to prevent brake fluid leakage. This structure requires the steel balls to be riveted onto the brake master cylinder body during assembly, which is time-consuming and can easily damage the cylinder body during the riveting process. At the same time, there is a risk of cylinder body cracking at the steel ball riveting point, which may cause brake fluid leakage and the risk of brake failure.

[0004] In view of this, the inventor specially designed a new type of compensation hole structure, and this case was thus generated. Utility Model Content

[0005] In order to solve the above problems, the technical solution of the utility model is as follows:

[0006] A new type of compensation hole structure, comprising:

[0007] The oil hole is provided at the front end of the brake master cylinder body, one side of which is connected to the liquid inlet cavity of the oil cup assembly;

[0008] The compensation hole is arranged through the oil hole and the cylinder body of the brake master cylinder and between the pressure cavity for the expansion and contraction of the first piston assembly.

[0009] Preferably, the compensation hole is arranged at the bottom of the oil hole close to the liquid inlet side where the oil hole is connected to the oil cup assembly, and the distance between the center position of the compensation hole and the inlet of the oil hole is 1.2-1.6 mm.

[0010] Preferably, the wall thickness between the oil hole at the position of the compensation hole and the pressure cavity is 0.8-1.2 mm.

[0011] Preferably, the compensation hole is composed of a downstream section and a flared section from top to bottom, the top of the downstream section is connected to the oil hole, and the bottom of the flared section is connected to the pressure chamber.

[0012] Preferably, the downstream section is columnar, the flared section is flared trumpet-shaped as a whole, and the diameter of the downstream section is 0.5-0.7 mm.

[0013] Preferably, the oil hole is columnar at a position away from the liquid inlet side where it is connected to the oil cup assembly and has a diameter of 3.5-4.5 mm.

[0014] Preferably, it also includes an oil passage, one end of which is connected to the oil cup assembly, and the other end of which is connected to the oil hole.

[0015] Preferably, the oil passage is linear, and the angle between the oil passage and the oil hole in the horizontal direction is 3°-5°.

[0016] Preferably, the bottom of the oil hole away from the liquid inlet side is chamfered.

[0017] The technical solution provided by the utility model has the following beneficial effects:

[0018] 1. The utility model reduces the wall thickness of the compensation hole during processing by processing the oil hole inside the brake master cylinder body, so that the compensation hole can be processed inside the brake master cylinder body, so that it does not need to use steel balls for riveting, reduces the collision of the brake master cylinder body, reduces the risk of cylinder body breakage, and thus reduces the risk of brake oil leakage and brake failure.

[0019] 2. The utility model sets an oil passage between the oil hole and the brake master cylinder body, so that the oil inside the cylinder body enters the oil hole and then enters the compensation hole. The horizontal angle between the oil passage and the oil hole is 3°-5°, which is convenient for the flow of oil.

[0020] 3. By setting the bottom of the oil hole away from the liquid inlet side as a chamfer, collision during sliding can be avoided and the service life can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] in:

[0023] Figure 1 It is a schematic diagram of the overall structure of the prior art;

[0024] Figure 2 yes Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 4 yes Figure 3 The enlarged structural diagram at B in the middle;

[0027] Figure 5 yes Figure 4 Enlarged structural diagram at point C in the middle.

[0028] Description of labels:

[0029] 1. Oil hole; 2. Compensation hole; 21. Downstream section; 22. Expanding section; 3. Brake master cylinder body; 4. Pressure chamber; 5. Oil passage; 6. Oil cup assembly; 61. Liquid inlet chamber; 7. First piston assembly; 8. Second piston assembly. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Please refer to Figure 1 and Figure 2 , is a structural diagram of the prior art. The compensation hole 2 is a steel ball sealing structure. This structure requires the steel ball to be riveted onto the brake master cylinder 3 during assembly, which consumes time and is prone to bruising and damaging the cylinder during the riveting process. There is a risk of cylinder cracking at the steel ball riveting point, resulting in brake fluid leakage and the risk of brake failure.

[0032] Please refer to Figures 3 to 5 , is a novel compensation hole 2 structure as the best embodiment of the utility model, comprising:

[0033] The oil hole 1 is opened at the front end of the brake master cylinder body 3, and one side of the oil hole 1 is connected to the liquid inlet chamber 61 of the oil cup assembly 6. The oil cup assembly 6 is composed of the liquid inlet chamber 61 and the reflux chamber, which together with the pressure chamber 4 form an oil circulation;

[0034] The compensation hole 2 is arranged between the oil hole 1 and the brake master cylinder 3 and the pressure chamber 4 for the expansion and contraction of the first piston assembly 7. The oil hole 1 and the compensation hole 2 are arranged inside the brake master cylinder 3. The oil flows into the oil hole 1 and then enters the pressure chamber 4 through the compensation hole 2. The compensation hole 2 is opened inside the brake master cylinder 3 to reduce the riveting pressure of the steel balls, reduce the risk of cylinder rupture, and improve the safety and stability of vehicle driving.

[0035] Please refer to Figures 3 to 5 The compensation hole 2 is arranged at the bottom of the oil hole 1 close to the liquid inlet side connected to the oil cup assembly 6. The distance between the center position of the compensation hole 2 and the inlet of the oil hole 1 is 1.2-1.6mm. In this specific embodiment, the distance between the center position of the compensation hole 2 and the inlet of the oil hole 1 is 1.4mm, which facilitates the oil to enter the pressure chamber 4 from the oil hole 1 through the compensation hole 2 to complete the inflow of oil.

[0036] Please refer to Figures 3 to 5 The wall thickness between the oil hole 1 and the pressure chamber 4 at the location of the compensation hole 2 is 0.8-1.2 mm. In the utility model, the wall thickness between the oil hole 1 and the pressure chamber 4 at the location of the compensation hole 2 is set to 1 mm, which facilitates the processing of the compensation hole 2, improves the processing efficiency, and reduces the risk of cylinder damage.

[0037] Please refer to Figure 5 The compensation hole 2 is composed of a downstream section 21 and a flared section 22 from top to bottom. The top of the downstream section 21 is connected to the oil hole 1, and the bottom of the flared section 22 is connected to the pressure chamber 4, which further facilitates the inflow of oil.

[0038] For further information, please refer to Figure 5 The downstream section 21 is columnar, and the flared section 22 is generally in the shape of a trumpet that expands outward. The diameter of the downstream section 21 is 0.5-0.7 mm. The flared section 22 expands in the direction approaching the pressure chamber 4. The diameter of the downstream section 21 of the utility model is 0.6 mm, which is convenient for oil to enter.

[0039] Please refer to Figure 3 The oil hole 1 is columnar and has a diameter of 3.5-4.5 mm at the position away from the liquid inlet side connected to the oil cup assembly 6. The diameter of the utility model is 4 mm, so that the inner wall thickness of the brake master cylinder 3 is reduced, so that the compensation hole 2 can be opened inside the brake master cylinder 3, reducing the risk of cylinder rupture caused by steel ball riveting, and reducing the risk of brake oil leakage and brake failure.

[0040] Please refer to Figure 3 , and also includes an oil passage 5, one end of the oil passage 5 is connected to the oil cup assembly 6, and the other end thereof is connected to the oil hole 1, and the oil passage 5 is connected to the oil hole 1 and the brake master cylinder body 3.

[0041] For details, please refer to Figure 3 The oil passage 5 is linear, and the horizontal angle between the oil passage 5 and the oil hole 1 is 3°-5°. The angle of the utility model is 4°. The horizontal angle between the oil passage 5 and the oil hole 1 determines the height difference between the two, so that the oil can enter the pressure chamber 4 through the compensation hole 2 under appropriate pressure.

[0042] Please refer to Figure 3 The bottom of the oil hole 1 away from the liquid inlet side is chamfered. When the first piston assembly 7 moves, the chamfered setting can reduce collision and damage during contact and increase service life.

[0043] The implementation principle of a new compensation hole 2 structure provided by the utility model is: an oil hole 1 is processed at the front end inside the brake master cylinder body 3. The existence of the oil hole 1 reduces the wall thickness of the brake master cylinder body 3, which is convenient for processing the compensation hole 2. In normal state, due to the excessive pressure in the pressure chamber 4, the oil cannot enter. When the brake pedal is released, the first piston assembly 7 returns to the initial state, and the second piston assembly 8 moves accordingly, causing the brake fluid in the oil cup assembly 6 to be replenished into the pressure chamber 4 through the compensation hole 2.

[0044] In summary, the utility model reduces the wall thickness of the compensation hole 2 during processing by processing the oil hole 1 inside the brake master cylinder body 3, so that the compensation hole 2 can be processed inside the brake master cylinder body 3, eliminating the need to use steel balls for riveting, reducing the collision of the brake master cylinder body 3, and reducing the risk of cylinder body breakage, thereby reducing the risk of brake oil leakage and brake failure.

[0045] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A novel compensating hole (2) structure, characterized in that: include: An oil hole (1) is provided at the front end of the brake master cylinder body (3), one side of which is connected to the liquid inlet chamber (61) of the oil cup assembly (6); The compensation hole (2) is arranged to penetrate the oil hole (1) and the inside of the brake master cylinder body (3) and between the pressure chamber (4) for the expansion and contraction of the first piston assembly (7).

2. A novel compensating hole (2) structure according to claim 1, characterized in that: The compensation hole (2) is arranged at the bottom of the oil hole (1) close to the liquid inlet side where it is connected to the oil cup assembly (6), and the distance between the center position of the compensation hole (2) and the inlet of the oil hole (1) is 1.2-1.6 mm.

3. A novel compensating hole (2) structure according to claim 1, characterized in that: The wall thickness between the oil hole (1) and the pressure cavity (4) at the location of the compensation hole (2) is 0.8-1.2 mm.

4. A novel compensating hole (2) structure according to claim 1, characterized in that: The compensation hole (2) comprises a downstream section (21) and a flared section (22) from top to bottom, the top of the downstream section (21) is connected to the oil hole (1), and the bottom of the flared section (22) is connected to the pressure chamber (4).

5. A novel compensating hole (2) structure according to claim 4, characterized in that: The downstream section (21) is columnar, the expanded section (22) is overall in the shape of a trumpet that expands outwards, and the diameter of the downstream section (21) is 0.5-0.7 mm.

6. A novel compensating hole (2) structure according to claim 1, characterized in that: The oil hole (1) is columnar in shape at a position away from the liquid inlet side where it is connected to the oil cup assembly (6) and has a diameter of 3.5-4.5 mm.

7. A novel compensating hole (2) structure according to claim 1, characterized in that: It also includes an oil passage (5), one end of which is connected to the oil cup assembly (6) and the other end of which is connected to the oil hole (1).

8. A novel compensating hole (2) structure according to claim 7, characterized in that: The oil passage (5) is linearly arranged, and the angle between the oil passage (5) and the oil passage hole (1) in the horizontal direction is 3°-5°.

9. A novel compensating hole (2) structure according to claim 1, characterized in that: The bottom of the oil hole (1) away from the liquid inlet side thereof is chamfered.

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