CN218624613U

CN218624613U - Brake pump with oil supplementing one-way valve structure

Info

Publication number: CN218624613U
Application number: CN202223184765.4U
Authority: CN
Inventors: 陈灵刚; 刘叶芝; 韩伟玉; 金作斌; 刘叶勇
Original assignee: Yuhuan Aoheng Machinery Co ltd
Current assignee: Yuhuan Aoheng Machinery Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-14
Anticipated expiration: 2032-11-29

Abstract

The utility model provides a brake pump of oily check valve structure is mended in area belongs to mechanical technical field. The brake pump solves the problem that the speed of replenishing oil into a brake cavity after the brake of the conventional brake pump is low. The brake pump with the oil supplementing check valve structure comprises a pump body and a piston assembly arranged in the pump body, wherein an oil inlet communicated with an oil inlet cavity is formed in the side portion of the pump body, a check valve cavity is further formed in the pump body, a check valve core and a check valve spring are arranged in the check valve cavity, the check valve cavity is communicated with the oil inlet and a brake cavity respectively, the check valve core blocks the oil inlet and the brake cavity under the elastic action of the check valve spring, and the elastic movement of the check valve spring can be overcome under the oil pressure action of the oil inlet, so that the oil inlet is communicated with the brake cavity. The brake pump with the oil supplementing one-way valve structure has the advantage of high oil supplementing speed.

Description

Brake pump with oil-supplementing one-way valve structure

Technical Field

The utility model belongs to the technical field of machinery, a brake pump of oily check valve structure is mended in area is related to.

Background

In the existing master cylinder with large oil discharge capacity, one of the master cylinder is a master cylinder whose inner cavity is sequentially divided into a brake cavity, an oil replenishing cavity and an oil inlet cavity by a piston, and the cross-sectional area of the brake cavity is smaller than that of the oil inlet cavity. However, in the actual braking process of the master cylinder, along with the inward pushing of the piston, the oil supplementing speed of the oil supplementing cavity to the braking cavity is slow, so that the oil pressure in the oil supplementing cavity is continuously increased, and large resistance is caused to the movement of the piston and the push rod, which is not beneficial to braking.

For this reason, the applicant has designed a booster master cylinder and applied for chinese patent with the application numbers: 202210247470.2; the publication number is as follows: CN114475547A; the master cylinder comprises a pump body and a piston assembly arranged in the pump body, wherein an inner cavity of the pump body is sequentially divided into a brake cavity, an oil supplementing cavity and an oil inlet cavity by the piston assembly, a sealing element capable of enabling oil to flow to the brake cavity in a one-way mode is connected to the piston assembly between the brake cavity and the oil supplementing cavity, an oil inlet communicated with the oil inlet cavity is formed in the side portion of the pump body, an adjusting cavity is further formed in the pump body, an adjusting valve core and an elastic element are arranged in the adjusting cavity, the adjusting cavity is respectively communicated with the brake cavity, the oil supplementing cavity and the oil inlet, the adjusting valve core can block the oil supplementing cavity and the oil inlet under the elastic force action of the elastic element, and the adjusting valve core can overcome the elastic force of the elastic element to move under the oil pressure action of the brake cavity and enable the oil supplementing cavity to be communicated with the oil inlet. In the master cylinder, pressure is released through the adjusting cavity, the adjusting valve core and the elastic piece, the oil in the oil supplementing cavity is rapidly released to the oil inlet, and braking resistance is reduced.

However, after braking is completed, the piston is reset, oil in the braking cavity is supplemented only by the oil supplementing cavity through the one-way sealing piece, the oil supplementing speed is slow, and the improvement of the response speed of continuous braking is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an above-mentioned problem to prior art exists provides a brake pump of oily check valve structure is mended in area, has solved the slow problem of current brake pump braking backward to mend oily speed in the braking chamber.

The purpose of the utility model can be realized by the following technical proposal:

the brake pump with the oil supplementing check valve structure comprises a pump body and a piston assembly arranged in the pump body, wherein an inner cavity of the pump body is sequentially divided into a brake cavity, an oil supplementing cavity and an oil inlet cavity by the piston assembly, a sealing element capable of enabling oil to flow to the brake cavity in a one-way mode is connected to the piston assembly between the brake cavity and the oil supplementing cavity, and an oil inlet communicated with the oil inlet cavity is formed in the side portion of the pump body.

The brake pump with the oil supplementing one-way valve structure is characterized in that a one-way valve cavity capable of communicating an oil inlet and a brake cavity is additionally arranged between the oil inlet and the brake cavity on the basis of the conventional brake pump structure, and a one-way valve core and a one-way valve spring capable of communicating the oil inlet and the brake cavity in one way are arranged in the one-way valve cavity.

When the brake is not applied, oil is provided in the brake cavity and the oil inlet, the oil pressure is approximately kept balanced, and the check valve core blocks the oil inlet and the brake cavity under the elastic force of the check valve spring, so that the check valve cavity is not communicated. When braking, the piston component moves towards the direction of the brake cavity, the oil pressure in the brake cavity rises, the one-way valve core is not opened, and the one-way valve cavity is still kept in a blocking state. After braking is finished, the piston assembly resets, oil in the oil supplementing cavity is supplemented to the braking cavity in a one-way mode through the sealing element, the oil supplementing speed is low, negative pressure is formed in the braking cavity, a large pressure difference is formed between the negative pressure and the oil inlet, the one-way valve core overcomes the elastic force of the one-way valve spring to move under the combined action of the negative pressure in the braking cavity and the oil pressure of the oil inlet, the oil inlet is communicated with the braking cavity, oil at the oil inlet is supplemented to the braking cavity rapidly through the one-way valve cavity, and the oil supplementing speed in the braking cavity after braking of the brake pump is finished is greatly improved.

In the brake pump with the oil-replenishing check valve structure, the check valve cavity is communicated with the oil inlet through an oil inlet hole formed in the pump body, the check valve cavity is communicated with the brake cavity through an oil replenishing hole formed in the pump body, and the check valve core blocks a port of the oil inlet hole under the elastic force action of the check valve spring.

In foretell brake pump of taking oil supplementing check valve structure, check valve core is including being the main part of tubbiness and being annular sealing washer, the blind end of main part sets up towards the inlet port, and the tip of main part blind end has the protrusion and is cylindrical supporting part, the supporting part is close to the one end outside of inlet port has the protrusion and is annular spacing portion, the one side that the inlet port was kept away from to spacing portion forms annular spacing groove, the sealing washer cover is established the outside of supporting part and the inboard of sealing washer have the protrusion to be annular spacing ring, the spacing ring stretches into spacing inslot, the one end tip that the sealing washer is close to the inlet port centers on the port setting of inlet port and closely support and lean on the lateral wall of check valve chamber. At the in-process of not braking or braking, the oil pressure of braking intracavity all is not less than the oil pressure of oil inlet department, can guarantee sealed effect better through the mode that supporting part and spacing portion supported ring type seal in the inboard.

In the brake pump with the oil supplementing check valve structure, the outer side of the sealing ring is also provided with a convex ring which protrudes to form an annular shape.

In the brake pump with the oil-replenishing one-way valve structure, a through hole is formed in the side portion of the main body in a penetrating manner. The through holes are formed, so that the pressure inside and outside the main body is kept balanced, the blockage of opening the one-way valve core is reduced, the opening speed of the one-way valve core is higher, and the oil supplementing speed is further improved.

In the brake pump with the oil supplementing check valve structure, one side of the check valve cavity, which is far away from the oil inlet hole, is provided with an opening communicated to the outer side of the pump body, the opening of the pump body is internally threaded with a plug, and two ends of a check valve spring are respectively abutted against the plug and the check valve core.

Compared with the prior art, the brake pump with the oil supplementing check valve structure is additionally provided with the check valve cavity which can be communicated with the oil inlet and the brake cavity, the check valve core can overcome the elastic force of the check valve spring to move under the combined action of the negative pressure in the brake cavity and the oil pressure of the oil inlet, the oil inlet is communicated with the brake cavity, the oil at the oil inlet is rapidly supplemented into the brake cavity through the check valve cavity, and the oil supplementing speed in the brake cavity after the brake of the brake pump is finished is greatly increased.

Drawings

Fig. 1 is a schematic sectional structural view of the brake pump with the oil-replenishing check valve structure.

Fig. 2 is a partial sectional structural schematic diagram of the brake pump with the oil-replenishing check valve structure at the check valve cavity.

Fig. 3 is a partially enlarged view of the brake pump with the oil replenishment check valve structure.

In the figure, 1, a pump body; 2. a piston assembly; 3. a brake chamber; 4. an oil replenishing cavity; 5. an oil inlet cavity; 6. a seal member; 7. an oil inlet; 8. a one-way valve cavity; 9. a one-way valve core; 10. a check valve spring; 11. an oil inlet hole; 12. an oil supplement hole; 13. a seal ring; 14. a main body; 15. a support portion; 16. a limiting part; 17. a limiting groove; 18. a limiting ring; 19. a convex ring; 20. a through hole; 21. and (7) a plug.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the brake pump with the oil supplementing check valve structure comprises a pump body 1 and a piston assembly 2 arranged in the pump body 1, an inner cavity of the pump body 1 is sequentially divided into a brake cavity 3, an oil supplementing cavity 4 and an oil inlet cavity 5 by the piston assembly 2, a sealing element 6 capable of enabling oil to flow to the brake cavity 3 in a single direction is connected to the piston assembly 2 between the brake cavity 3 and the oil supplementing cavity 4, an oil inlet 7 communicated with the oil inlet cavity 5 is formed in the side portion of the pump body 1, an adjusting cavity is further formed in the pump body 1, and an adjusting valve core and an adjusting spring are arranged in the adjusting cavity. The above structure is basically the same as that in the patent previously filed by the applicant and is not described in detail.

The pump body 1 is also internally provided with a one-way valve cavity 8, a one-way valve core 9 and a one-way valve spring 10 are arranged in the one-way valve cavity 8, the one-way valve cavity 8 is communicated with the oil inlet 7 through an oil inlet hole 11 formed in the pump body 1, the one-way valve cavity 8 is communicated with the brake cavity 3 through an oil supplementing hole 12 formed in the pump body 1, and the one-way valve core 9 blocks the port of the oil inlet hole 11 under the elastic force action of the one-way valve spring 10.

Specifically, the check valve element 9 includes a cylindrical main body 14 and a circular ring-shaped sealing ring 13, the closed end of the main body 14 is disposed toward the oil inlet hole 11, and the end of the closed end of the main body 14 has a protruding cylindrical supporting portion 15, the outer side of one end of the supporting portion 15 close to the oil inlet hole 11 has a protruding circular limiting portion 16, and a circular limiting groove 17 is formed between one side of the limiting portion 16 away from the oil inlet hole 11 and the end of the closed end of the main body 14. The sealing ring 13 is sleeved on the outer side of the supporting portion 15, the inner side of the sealing ring 13 is provided with a limiting ring 18 protruding in an annular shape, the limiting ring 18 extends into the limiting groove 17 to limit the sealing ring 13 on the main body 14, one end of the sealing ring 13 close to the oil inlet hole 11 is arranged around the port of the oil inlet hole 11 and tightly abuts against the side wall of the one-way valve cavity 8, and the outer side of the sealing ring 13 is further provided with a protruding ring 19 protruding in an annular shape. In this embodiment, an oil clearance is formed between the outer side of the main body 14 and the side wall of the check valve cavity 8, and a through hole 20 is formed through the side of the main body 14; one side of the one-way valve cavity 8, which is far away from the oil inlet 11, namely, one end of the one-way valve cavity, which is close to the opening of the main body 14, is provided with an opening communicated to the outer side of the pump body 1, the opening of the pump body 1 is internally threaded with a plug 21, the one-way valve spring 10 is partially arranged in the main body 14, and two ends of the one-way valve spring 10 respectively abut against the plug 21 and the one-way valve core 9.

When the brake is not applied, oil is provided in the brake cavity 3 and the oil inlet 7, the oil pressure is kept balanced approximately, and the check valve core 9 blocks the oil inlet 7 and the brake cavity 3 under the elastic force of the check valve spring 10, so that the check valve cavity 8 is not communicated.

During braking, the piston assembly 2 moves towards the brake cavity 3, the oil pressure in the brake cavity 3 is increased, the one-way valve core 9 is not opened, and the one-way valve cavity 8 still keeps a blocking state.

After braking is finished, the piston assembly 2 is reset, oil in the oil supplementing cavity 4 is supplemented to the brake cavity 3 in a one-way mode through the sealing element 6, the oil supplementing speed is low, negative pressure is formed in the brake cavity 3, large pressure difference is formed between the oil supplementing cavity and the oil inlet 7, the one-way valve core 9 overcomes the elastic force of the one-way valve spring 10 to move under the combined action of the negative pressure in the brake cavity 3 and the oil pressure of the oil inlet 7, the oil inlet 7 is communicated with the brake cavity 3, oil in the oil inlet 7 is supplemented to the brake cavity 3 rapidly through the one-way valve cavity 8, and the oil supplementing speed in the brake cavity 3 after braking of the brake pump is finished is greatly improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A brake pump with an oil-replenishing one-way valve structure comprises a pump body (1) and a piston assembly (2) arranged in the pump body (1), wherein the inner cavity of the pump body (1) is sequentially divided into a brake cavity (3), an oil-replenishing cavity (4) and an oil inlet cavity (5) by the piston assembly (2), a sealing piece (6) capable of enabling oil to flow in one direction to the brake cavity (3) is connected onto the piston assembly (2) between the brake cavity (3) and the oil-replenishing cavity (4), an oil inlet (7) communicated with the oil inlet cavity (5) is formed in the side portion of the pump body (1), the brake pump is characterized in that a one-way valve cavity (8) is further formed in the pump body (1), a one-way valve core (9) and a one-way valve spring (10) are arranged in the one-way valve cavity (8), the one-way valve cavity (8) is respectively communicated with the oil inlet (7) and the brake cavity (3), the one-way valve core (9) blocks the oil inlet (7) and the brake cavity (3) under the elastic action of the one-way valve spring (10) and can overcome the elastic force of the one-way valve spring (10) to move and enable the oil inlet (7) to be communicated with the brake cavity (3) under the oil pressure action of the oil pressure of the oil inlet (7).

2. The brake pump with the oil-replenishing one-way valve structure according to claim 1, wherein the one-way valve cavity (8) is communicated with the oil inlet (7) through an oil inlet hole (11) formed in the pump body (1), the one-way valve cavity (8) is communicated with the brake cavity (3) through an oil replenishing hole (12) formed in the pump body (1), and the one-way valve core (9) blocks the port of the oil inlet hole (11) under the elastic force of the one-way valve spring (10).

3. The brake pump with the oil supplementing check valve structure according to claim 2, wherein the check valve core (9) includes a barrel-shaped main body (14) and an annular sealing ring (13), the closed end of the main body (14) is disposed toward the oil inlet hole (11), the end of the closed end of the main body (14) has a supporting portion (15) protruding in a column shape, the outer side of one end of the supporting portion (15) close to the oil inlet hole (11) has a protruding annular limiting portion (16), one side of the limiting portion (16) far away from the oil inlet hole (11) has an annular limiting groove (17), the sealing ring (13) is sleeved on the outer side of the supporting portion (15) and the inner side of the sealing ring (13) has a protruding annular limiting ring (18), the limiting ring (18) extends into the limiting groove (17), and the end of one end of the sealing ring (13) close to the oil inlet hole (11) is disposed around the port of the oil inlet hole (11) and tightly abuts against the side wall of the check valve cavity (8).

4. The brake pump with the oil compensating check valve structure as recited in claim 3, wherein the outer side of the seal ring (13) is further provided with a protruding ring (19) protruding in a ring shape.

5. The brake pump with the oil supplementing one-way valve structure according to claim 3 or 4, wherein a through hole (20) is formed through the side of the main body (14).

6. The brake pump with the oil supplementing one-way valve structure is characterized in that one side, far away from the oil inlet hole (11), of the one-way valve cavity (8) is provided with an opening communicated to the outer side of the pump body (1), the opening of the pump body (1) is connected with a plug (21) in a threaded mode, and two ends of the one-way valve spring (10) abut against the plug (21) and the one-way valve core (9) respectively.