Double-piston brake pump with good sealing performance

Abstract

The utility model relates to the technical field of brake pumps, and discloses a double-piston brake pump with good sealing performance, which comprises an outer shell and an inner shell, a cavity is formed between the outer shell and the inner shell, two groups of accommodating chambers are arranged in the inner shell, piston assemblies are arranged in the two groups of accommodating chambers, one end of the outer shell is fixedly provided with a mounting plate, and the other end of the outer shell is fixedly provided with a piston assembly. A groove is formed in the outer surface of the mounting plate, a sealing assembly is arranged in the groove, the mounting plate is connected with the cover plate through connecting bolts, and two ventilation assemblies are mounted on the inner wall of the cover plate. Through the arrangement of the sealing assembly, it is ensured that fluid or gas in the cavity cannot leak to the external environment, meanwhile, external impurities cannot enter the cavity, the sealing effect is good, and the situation that dust enters the piston part of the brake pump, and consequently the brake pump works unsmoothly is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of brake pumps, and particularly relates to a double-piston brake pump with good sealing performance. Background Technique

[0002] A brake pump, usually known as a master brake cylinder or a brake master cylinder, is one of the key components in an automotive braking system. It is responsible for converting the mechanical energy applied by the driver on the brake pedal into hydraulic energy, and then transmitting it to each brake slave cylinder through brake fluid (or gas), ultimately pushing the brake shoes or brake calipers to generate braking force.

[0003] The utility model patent application document with the publication number of "CN213419737U" discloses a single-body round oil cup double-piston brake pump, which includes an outer shell body. An inner shell body is arranged inside the outer shell body, and the outer shell body and the inner shell body are of an integrally formed structure. A sliding groove is formed on the inner wall of the inner shell body. A water storage cavity is arranged between the outer shell body and the inner shell body. A water inlet pipe is arranged on the outer wall of the top of the outer shell body near the left side, and the water inlet pipe is communicated with the water storage cavity. A screw cap is threadedly connected to the top end of the water inlet pipe. An installation seat is welded to the left side of the outer shell body. Ventilation holes are respectively arranged near the top and bottom inside the installation seat, and a fixed cover is arranged at the air inlet on the left side of the ventilation hole; a pressure relief structure is arranged on the outer wall of the top of the outer shell body near the middle position. The pressure relief structure includes a pressure relief pipe, and the bottom end of the pressure relief pipe extends into the inner shell body. This single-body round oil cup double-piston brake pump has the functions of heat dissipation and heat preservation, and can well protect the brake pump in summer and winter.

[0004] The above-mentioned single-body round oil cup double-piston brake pump disclosed in the document has the following defects: there will be a certain gap when connecting the mounting plate to the brake pump housing, and dust entering the piston part of the brake pump may cause the brake pump to work smoothly. Especially when the dust mixes with the brake fluid to form sludge, it may cause the piston to get stuck.

[0005] It can be seen from this that the existing single-body round oil cup double-piston brake pump does not have a good sealing structure, and it is necessary to improve the existing deficiencies to provide a double-piston brake pump with good sealing performance. Content of the Utility Model

[0006] The purpose of the utility model is to provide a double-piston brake pump with good sealing performance to solve the problems raised in the above background technique.

[0007] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0008] The utility model relates to a double-piston brake pump with good sealing performance, which comprises an outer shell and an inner shell. A chamber is formed between the outer shell and the inner shell. Two accommodating chambers are arranged inside the inner shell. Piston assemblies are arranged inside the two accommodating chambers. One end of the outer shell is fixedly provided with a mounting plate. A groove is formed on the outer surface of the mounting plate. A sealing assembly is arranged inside the groove. The mounting plate is connected with a cover plate through a connecting bolt. Two ventilation assemblies are mounted on the inner wall of the cover plate.

[0009] Furthermore, the sealing assembly comprises a first spring, a sliding plate and a sealing gasket. A plurality of first springs are fixedly mounted inside the groove. The inner wall of the groove is slidably connected with the sliding plate. The sliding plate is connected with the first spring. A sealing gasket is arranged on the outer surface of the sliding plate. The sealing gasket abuts against the cover plate.

[0010] Furthermore, the ventilation assembly comprises a ventilation pipe, a fixing plate, fine holes and a connecting cover. Two ventilation pipes are fixedly mounted on the inner wall of the cover plate. The two ventilation pipes are communicated with the chamber. Fixing plates are fixedly mounted on the inner walls of the two ventilation pipes. A plurality of fine holes are formed on the outer surface of the fixing plate. The outer surface of the ventilation pipe is threadedly connected with the connecting cover.

[0011] Furthermore, a water adding pipe is fixedly mounted on the outer surface of the outer shell. The water adding pipe is communicated with the chamber.

[0012] Furthermore, two pressure relief assemblies are fixedly mounted on the outer surface of the outer shell. The two pressure relief assemblies are respectively communicated with the two accommodating chambers.

[0013] Furthermore, the piston assembly comprises a push rod, a second spring and a piston. The inner wall of the cover plate is slidably connected with the push rod. One end of the push rod is fixedly provided with a second spring. A piston is arranged at one end of the second spring. The piston abuts against the inner wall of the inner shell.

[0014] The utility model has the following beneficial effects:

[0015] (1) When the cover plate and the mounting plate are fastened through the connecting bolt in the utility model, the sliding plate will be tightly pressed on the cover plate under the action of the first spring, so that the sealing gasket is closely attached between the two, forming a sealed state, ensuring that the fluid or gas inside the chamber will not leak into the external environment, and at the same time, external impurities cannot enter the chamber. The sealing effect is good, avoiding the situation that dust enters the piston part of the brake pump and causes the brake pump to work smoothly.

[0016] When the utility model ventilates the chamber through the ventilation pipe by opening the connection cover, due to the arrangement of the fixing plate and the fine holes, when natural wind passes through the multiple fine holes, the air flow will be accelerated. When the wind speed increases, the kinetic energy of the wind increases while the pressure decreases. This decrease in pressure leads to an increase in the air density, thereby causing a decrease in temperature.

[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 Schematic cross-sectional view of one side of the overall structure of the present utility model;

[0021] Figure 3 Schematic diagram of the exploded structure of the outer shell and the sealing component of the present utility model;

[0022] Figure 4 Schematic cross-sectional view of the front side structure of the overall structure of the present utility model;

[0023] Figure 5 Schematic diagram of the exploded structure of the ventilation component of the present utility model;

[0024] In the drawings, the list of components represented by each reference numeral is as follows:

[0025] In the figure: 1. Outer shell; 101. Inner shell; 102. Accommodation chamber; 2. Installation plate; 201. Groove; 3. First spring; 4. Sliding plate; 5. Sealing gasket; 6. Cover plate; 7. Connecting bolt; 8. Ventilation component; 801. Ventilation pipe; 802. Fixing plate; 803. Fine hole; 804. Connection cover; 9. Pressure relief component; 10. Water adding pipe; 11. Push rod; 12. Second spring; 13. Piston. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1 - Figure 4 As shown, the present utility model is a double-piston brake pump with good sealing performance, including an outer housing 1 and an inner housing 101. A chamber is formed between the outer housing 1 and the inner housing 101. Two accommodating chambers 102 are provided inside the inner housing 101. Piston assemblies are provided inside both of the two accommodating chambers 102. One end of the outer housing 1 is fixedly installed with a mounting plate 2. A groove 201 is formed on the outer surface of the mounting plate 2. A sealing assembly is provided inside the groove 201. The mounting plate 2 is connected to a cover plate 6 through a connecting bolt 7. Two ventilation assemblies 8 are installed on the inner wall of the cover plate 6;

[0028] The sealing assembly includes a first spring 3, a sliding plate 4, and a sealing gasket 5. A plurality of first springs 3 are fixedly installed inside the groove 201. The inner wall of the groove 201 is slidably connected to a sliding plate 4. The sliding plate 4 is connected to the first spring 3. A sealing gasket 5 is provided on the outer surface of the sliding plate 4. The sealing gasket 5 abuts against the cover plate 6;

[0029] When the cover plate 6 and the mounting plate 2 are fastened through the connecting bolt 7, the sliding plate 4 will be tightly pressed against the cover plate 6 under the action of the first spring 3, so that the sealing gasket 5 is closely attached between the two, forming a sealed state, ensuring that the fluid or gas inside the chamber will not leak to the external environment, and at the same time external impurities cannot enter the chamber. The sealing effect is good, avoiding the situation that dust enters the piston part of the brake pump and causes the brake pump to work smoothly;

[0030] The ventilation assembly 8 includes a ventilation pipe 801, a fixing plate 802, fine holes 803, and a connecting cover 804. Two ventilation pipes 801 are fixedly installed on the inner wall of the cover plate 6. The two ventilation pipes 801 are communicated with the chamber. Fixing plates 802 are fixedly installed on the inner walls of the two ventilation pipes 801. A plurality of fine holes 803 are formed on the outer surface of the fixing plate 802. The outer surface of the ventilation pipe 801 is threadedly connected to a connecting cover 804;

[0031] When the connecting cover 804 is opened to ventilate the chamber through the ventilation pipe 801, through the arrangement of the fixing plate 802 and the fine holes 803, when natural wind passes through the plurality of fine holes 803, the flow of air will be accelerated. When the wind speed increases, the kinetic energy of the wind increases, while the pressure decreases. This decrease in pressure will cause the density of the air to increase, thereby causing the temperature to decrease;

[0032] A water inlet pipe 10 is fixedly installed on the outer surface of the outer housing 1, and the water inlet pipe 10 is communicated with the chamber;

[0033] Two pressure relief components 9 are fixedly installed on the outer surface of the outer housing 1, and the two pressure relief components 9 are respectively communicated with two groups of accommodation chambers 102;

[0034] The piston assembly includes a push rod 11, a second spring 12 and a piston 13. The push rod 11 is slidably connected to the inner wall of the cover plate 6. One end of the push rod 11 is fixedly installed with a second spring 12. One end of the second spring 12 is provided with a piston 13, and the piston 13 abuts against the inner wall of the inner housing 101.

[0035] During use, first connect the mounting plate 2 and the cover plate 6 through the connecting bolts 7. When the cover plate 6 and the mounting plate 2 are fastened by the connecting bolts 7, the sliding plate 4 will be tightly pressed against the cover plate 6 under the action of the first spring 3, so that the gasket 5 is closely attached between the two, forming a sealed state, ensuring that the fluid or gas inside the chamber will not leak into the external environment, and at the same time external impurities cannot enter the chamber, with good sealing effect, avoiding the situation that dust enters the piston part of the brake pump and causes the brake pump to work smoothly. When the connecting cover 804 is opened and the chamber is ventilated through the ventilation pipe 801, through the settings of the fixing plate 802 and the fine holes 803, when the natural wind passes through the multiple fine holes 803, the flow of air will be accelerated. When the wind speed increases, the kinetic energy of the wind increases, while the pressure decreases. This decrease in pressure will cause the density of the air to increase, resulting in a decrease in temperature.

[0036] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor limit the present invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A double-piston brake pump with good sealing performance, comprising an outer housing (1) and an inner housing (101), characterized in that: A chamber is formed between the outer shell (1) and the inner shell (101); two groups of accommodating chambers (102) are provided inside the inner shell (101); piston assemblies are provided inside the two groups of accommodating chambers (102); a mounting plate (2) is fixedly mounted on one end of the outer shell (1); a groove (201) is provided on the outer surface of the mounting plate (2); a sealing assembly is provided inside the groove (201); the mounting plate (2) is connected to the cover plate (6) via connecting bolts (7); and two groups of ventilation assemblies (8) are installed on the inner wall of the cover plate (6).

2. A double-piston brake pump with good sealing performance according to claim 1, characterized in that: The sealing assembly comprises a first spring (3), a sliding plate (4) and a sealing gasket (5); a plurality of first springs (3) are fixedly mounted inside the groove (201); a sliding plate (4) is slidably connected to the inner wall of the groove (201); the sliding plate (4) is connected to the first spring (3); a sealing gasket (5) is arranged on the outer surface of the sliding plate (4); and the sealing gasket (5) is in contact with the cover plate (6).

3. A double-piston brake pump with good sealing performance according to claim 1, characterized in that: The ventilation assembly (8) comprises a ventilation pipe (801), a fixing plate (802), fine holes (803) and a connecting cover (804); two groups of ventilation pipes (801) are fixedly mounted on the inner wall of the cover plate (6); the two ventilation pipes (801) are connected to the chamber; the inner walls of the two ventilation pipes (801) are fixedly mounted with a fixing plate (802); the outer surface of the fixing plate (802) is provided with a plurality of fine holes (803); and the outer surface of the ventilation pipe (801) is threadedly connected with a connecting cover (804).

4. A double-piston brake pump with good sealing performance according to claim 1, characterized in that: A water supply pipe (10) is fixedly mounted on the outer surface of the outer shell (1), and the water supply pipe (10) is connected to the chamber.

5. A double-piston brake pump with good sealing performance according to claim 1, characterized in that: Two pressure relief components (9) are fixedly mounted on the outer surface of the outer shell (1), and the two pressure relief components (9) are respectively connected to the two groups of accommodation chambers (102).

6. A double-piston brake pump with good sealing performance according to claim 1, characterized in that: The piston assembly comprises a push rod (11), a second spring (12) and a piston (13); the push rod (11) is slidably connected to the inner wall of the cover plate (6); one end of the push rod (11) is fixedly mounted with the second spring (12); one end of the second spring (12) is provided with a piston (13); the piston (13) abuts against the inner wall of the inner shell (101).

Images