Oil can structure of clutch brake master cylinder

Abstract

The utility model relates to the field of clutch brake master pumps, and discloses an oil can structure of a clutch brake master pump, which comprises a can opening (1), a support (2) is arranged at the position of the can opening (1), a valve structure (3) is arranged on the support (2), a breathing hole (4) is arranged on the support (2), and the valve structure (3) cuts off communication between the breathing hole (4) and the inside of the can opening (1). The valve structure (3) abuts against the inner wall of the support (2), and under the action of external force, the valve structure (3) enables the breathing hole (4) to be communicated with the interior of the kettle opening (1) through movement or deformation. The oil pot structure does not leak, and is safer to use and lower in use cost.

Description

Technical Field

[0001] The utility model relates to the field of clutch and brake master cylinders, in particular to an oil pot structure of a clutch and brake master cylinder. Background Art

[0002] CN115782841 discloses a variable-bore brake master cylinder for an electric three-wheeled passenger vehicle. The oil cup structure employed in this cylinder is also common in passenger and commercial vehicles. However, existing products have a disadvantage: when the vehicle traverses bumpy roads, the oil cup can cause splashing brake fluid to leak through the gap in the diaphragm. This can lead to abnormal brake fluid depletion over time. Utility Model Content

[0003] The utility model aims at the shortcomings of the prior art and provides an oil pot structure of a clutch brake master cylinder.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] The invention discloses an oil pot structure of a clutch brake master cylinder, comprising a pot mouth, a bracket installed at the pot mouth, a valve structure installed on the bracket, a breathing hole provided on the bracket, and the valve structure blocking the communication between the breathing hole and the inside of the pot mouth.

[0006] Preferably, the valve structure contacts the inner wall of the bracket, and under the action of external force, the valve structure moves or deforms to connect the breathing hole and the inside of the pot mouth.

[0007] Preferably, the bracket is a cover structure, the lower end of the bracket is connected to the pot mouth and covers the pot mouth, the breathing hole is arranged on the outer wall of the bracket and is connected with the internal space of the bracket, the valve structure includes a mounting part and a sealing part, the sealing part is an elastic part, the sealing part is in contact with the inner wall of the bracket, and the contact position is located below the breathing hole to isolate the breathing hole from the connection with the inside of the pot mouth.

[0008] Preferably, the bracket includes a mounting sleeve, the sealing portion is trumpet-shaped with a small upper portion and a large lower portion, the upper end of the sealing portion is a sealing structure, the mounting portion is connected to the upper end of the outer side of the sealing portion, the outer ring side surface of the sealing portion abuts against the inner side surface of the mounting sleeve, the breathing hole is opened on the mounting sleeve, and in the initial state, the sealing position of the sealing portion and the mounting sleeve is located at the lower side of the breathing hole.

[0009] Preferably, a mounting hole is provided on the top plate of the bracket, the mounting portion has a limiting annular groove, and the upper and lower side surfaces of the mounting hole are limited within the annular limiting groove.

[0010] Preferably, the width of the annular limiting groove is greater than the thickness of the top plate.

[0011] As a preferred embodiment, the lower end of the bracket is provided with an axial clamping ring and a radial limiting step. The clamping ring is inserted into the pot mouth and fits with the inner part of the pot mouth, and the limiting step abuts against the upper end surface of the pot mouth.

[0012] Preferably, an oil cup cover is further included, which covers the outside of the bracket and is connected to the outside of the pot mouth.

[0013] Compared with the existing technology, this solution has the following advantages: the new structure uses a sealing structure to realize the air inlet and outlet of the oil cup. The sealing valve can still remain closed in a bumpy state, and the liquid cannot flow out of the oil cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the prior art design.

[0015] Figure 2 A schematic diagram of the overall structure of the device.

[0016] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure.

[0017] The technical names of the figures in the figure are: 1-mouth, 2-bracket, 3-valve structure, 4-breathing hole, 5-mounting part, 6-sealing part, 7-mounting sleeve, 8-mounting hole, 9-limiting groove, 10-clamping ring, 11-limiting step, 12-oil cup cover. DETAILED DESCRIPTION

[0018] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0019] Example 1

[0020] A clutch brake master cylinder oil pot structure includes a pot mouth 1, a bracket 2 mounted at pot mouth 1, a valve structure 3 mounted on bracket 2, a breathing hole 4 provided on bracket 2, and valve structure 3 separating the breathing hole 4 from the interior of pot mouth 1. The oil pot, also known as an oil cup, is characterized by the bracket 2 serving as a cover structure that completely seals pot mouth 1 when closed. To achieve ventilation, a breathing hole 4 is provided on the side of bracket 2. The breathing hole 4 is connected to the atmosphere on the outside and to the pot mouth 1 on the inside. To achieve regulation and prevent leakage, this solution utilizes an inventive structure to achieve these functions.

[0021] The valve structure 3 contacts the inner wall of the bracket 2. Under the action of external force, the valve structure 3 moves or deforms, connecting the breathing hole 4 with the interior of the kettle mouth 1. When the pressure inside the kettle mouth 1 is lower than the external atmospheric pressure, the external atmospheric pressure enters the upper chamber of the valve through the breathing hole 4 and acts on the valve, temporarily breaking the valve from contact with the inner wall of the bracket 2, allowing the external atmosphere to enter the kettle mouth 1. When the pressure inside the kettle mouth 1 is higher than the external atmospheric pressure, the air pressure inside the kettle mouth 1 pushes the valve upward, connecting the inner chamber of the kettle mouth 1 with the breathing hole 4. After the pressure is balanced, the valve returns to its original position.

[0022] In this embodiment, the bracket 2 is a cover structure. The lower end of the bracket 2 is connected to the pot mouth 1 and covers the pot mouth 1. The breathing hole 4 is provided on the outer wall of the bracket 2 and communicates with the internal space of the bracket 2. The valve structure 3 includes a mounting portion 5 and a sealing portion 6. The sealing portion 6 is an elastic member. The sealing portion 6 abuts against the inner wall of the bracket 2. The abutment position is located below the breathing hole 4, isolating the breathing hole 4 from the communication with the interior of the pot mouth 1. When the internal air pressure is low, the external air pressure acts on the sealing portion 6, causing the sealing portion 6 to separate from the seal with the inner wall of the bracket 2, allowing atmospheric air to enter the pot mouth 1. After the pressure is balanced, the sealing portion 6 reseals and adheres to the inner wall of the bracket 2 under the action of its own elastic force.

[0023] The bracket 2 includes a mounting sleeve 7, and the sealing portion 6 is trumpet-shaped, smaller at the top and larger at the bottom. The upper end of the sealing portion 6 is a sealing structure. The mounting portion 5 is connected to the upper end of the outer side of the sealing portion 6. The outer ring side of the sealing portion 6 contacts the inner side of the mounting sleeve 7. The breathing hole 4 is provided on the mounting sleeve 7. In the initial state, the sealing position of the sealing portion 6 and the mounting sleeve 7 is located on the lower side of the breathing hole 4. A mounting hole 8 is provided on the top plate of the bracket 2. The mounting portion 5 has a limiting annular groove. The upper and lower sides of the mounting hole 8 are limited in the annular limiting groove 9. The width of the annular limiting groove 9 is greater than the thickness of the top plate. When the pressure inside the pot mouth 1 is high, the pressure inside the pot mouth 1 will push the sealing portion 6 to deform upward and the mounting portion 5 will move slightly upward, thereby connecting the breathing hole 4 and the inside of the pot mouth 1. After the pressure is balanced, under the action of its own elastic force and gravity, the sealing portion 6 returns to its position to cut off the connection between the breathing hole 4 and the inside of the pot mouth 1.

[0024] Compared with the existing technology, this solution has the following advantages: the new structure uses a sealing structure to realize the air inlet and outlet of the oil cup. The sealing valve can still remain closed in a bumpy state, and the liquid cannot flow out of the oil cup.

[0025] Example 2

[0026] The difference between this embodiment and embodiment 1 is that, in this solution, an axial retaining ring 10 and a radial limiting step 11 are provided at the lower end of the bracket 2. The retaining ring 10 is inserted into the pot mouth 1 and fits with the interior of the pot mouth 1, and the limiting step 11 abuts against the upper end surface of the pot mouth 1.

[0027] Example 3

[0028] The difference between this embodiment and the first embodiment is that it further includes an oil cup cover 12 , which covers the outside of the bracket 2 and is connected to the outside of the pot mouth 1 .

Claims

1. An oil pot structure for a clutch brake master cylinder, characterized by: The invention comprises a pot mouth (1), a bracket (2) is installed at the pot mouth (1), a valve structure (3) is installed on the bracket (2), a breathing hole (4) is provided on the bracket (2), and the valve structure (3) blocks the communication between the breathing hole (4) and the inside of the pot mouth (1).

2. The oil pot structure of a clutch and brake master cylinder according to claim 1, characterized in that: The valve structure (3) contacts the inner wall of the bracket (2). Under the action of external force, the valve structure (3) moves or deforms to connect the breathing hole (4) and the inside of the pot mouth (1).

3. The oil pot structure of a clutch and brake master cylinder according to claim 1, characterized in that: The bracket (2) is a cover structure. The lower end of the bracket (2) is connected to the pot mouth (1) and covers the pot mouth (1). The breathing hole (4) is arranged on the outer wall of the bracket (2) and communicates with the inner space of the bracket (2). The valve structure (3) includes a mounting portion (5) and a sealing portion (6). The sealing portion (6) is an elastic member. The sealing portion (6) contacts the inner wall of the bracket (2), and the contact position is located below the breathing hole (4) to isolate the communication between the breathing hole (4) and the inside of the pot mouth (1).

4. The oil pot structure of a clutch and brake master cylinder according to claim 3, characterized in that: The bracket (2) includes a mounting sleeve (7), a sealing portion (6) having a trumpet shape with a small upper portion and a large lower portion, an upper end of the sealing portion (6) having a sealing structure, a mounting portion (5) connected to an upper end of an outer side of the sealing portion (6), an outer ring side surface of the sealing portion (6) abutting against an inner side surface of the mounting sleeve (7), a breathing hole (4) being provided on the mounting sleeve (7), and a sealing position of the sealing portion (6) and the mounting sleeve (7) being located below the breathing hole (4) in an initial state.

5. The oil pot structure of the clutch and brake master cylinder according to claim 3, characterized in that: A mounting hole (8) is provided on the top plate of the bracket (2), the mounting portion (5) has a limiting annular groove, and the upper and lower side surfaces of the mounting hole (8) are limited within the annular limiting groove (9).

6. The oil pot structure of the clutch and brake master cylinder according to claim 5, characterized in that: The width of the annular limiting groove (9) is greater than the thickness of the top plate.

7. The oil pot structure of a clutch and brake master cylinder according to claim 1, characterized in that: The lower end of the bracket (2) is provided with an axial snap ring (10) and a radial limiting step (11); the snap ring (10) is inserted into the pot mouth (1) and fits in the interior of the pot mouth (1); the limiting step (11) abuts against the upper end surface of the pot mouth (1).

8. The oil pot structure of a clutch and brake master cylinder according to claim 1, characterized in that: It also includes an oil cup cover (12), which covers the outside of the bracket (2) and is connected to the outside of the pot mouth (1).

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