CN216636448U

CN216636448U - Piston symmetric arrangement series double-acting brake main pump

Info

Publication number: CN216636448U
Application number: CN202122667094.6U
Authority: CN
Inventors: 王能仓; 王军
Original assignee: Wuxi Cheneng Technology Co ltd
Current assignee: Jiangsu Cheneng Technology Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-05-31
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses a serial double-acting brake main pump with symmetrically arranged pistons, which adopts the technical scheme that the serial double-acting brake main pump comprises a pump body, wherein a first working cavity and a second working cavity are formed in the pump body, the first working cavity and the second working cavity are symmetrically arranged around the center of the pump body, a first piston is telescopically arranged in the first working cavity, and a first oil inlet and a first oil outlet which are communicated with the first working cavity are formed in the pump body; the pump body is provided with a first piston in a telescopic mode, and the pump body is provided with a first oil inlet and a first oil outlet which are communicated with the first working cavity.

Description

Piston symmetric arrangement series double-acting brake main pump

Technical Field

The utility model relates to the field of brake main pumps, in particular to a series double-acting brake main pump with symmetrically arranged pistons.

Background

The main braking pump is one of the main components in the braking system of the automobile and is used for converting mechanical energy input by a pedal mechanism into hydraulic energy. With the development of the times, in order to improve the driving safety of automobiles, according to the requirements of traffic laws and regulations, the conventional service brake system of automobiles adopts a double-circuit brake main pump. According to the traditional double-circuit brake main pump, a brake main cylinder is formed by connecting two single cavities in series, a piston is arranged in a cylinder body to separate the two single cavities, the internal structures of the two single cavities are complex, the variety of internal parts is large, the universality is poor, and the difficulty is caused in processing and maintenance.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a series double-acting brake main pump with symmetrically arranged pistons, which has the advantages of simple structure, high reliability, few accessory varieties, strong universality and convenience for processing and maintenance.

The technical purpose of the utility model is realized by the following technical scheme:

a serial double-acting brake main pump with symmetrically arranged pistons comprises a pump body, wherein a first working cavity and a second working cavity are formed in the pump body, the first working cavity and the second working cavity are symmetrically arranged around the center of the pump body, a first piston is telescopically arranged in the first working cavity, and a first oil inlet and a first oil outlet which are communicated with the first working cavity are formed in the pump body; the second piston is arranged in the second working cavity in a telescopic mode, and a second oil inlet hole and a second oil outlet hole which are communicated with the second working cavity are formed in the pump body.

Furthermore, first valve plates are respectively installed at two ends of the first piston, the first valve plates are abutted to the inner wall of the first working cavity, the two first valve plates are enclosed to form a cavity which is a first compensation cavity, and the first compensation cavity is communicated with the first oil inlet hole.

Furthermore, a cavity is enclosed by the first valve plate at the tail end of the first piston and the tail part of the first working cavity to form a first compression cavity, and the first compression cavity is communicated with the first oil outlet.

Furthermore, a first return spring is arranged at the bottom end of the first compression cavity, and when the first piston moves inwards to the limit position, the first piston presses the first return spring.

Furthermore, the end of the first piston is connected with a first piston rod, and the first piston rod extends out of the pump body.

Furthermore, second valve plates are respectively installed at two ends of the second piston, the second valve plates are abutted to the inner wall of the second working cavity, the two second valve plates form a cavity in a surrounding mode to form a second compensation cavity, and the second compensation cavity is communicated with the second oil inlet hole.

Furthermore, a cavity is enclosed by a second valve plate at the tail end of the second piston and the tail of the second working cavity to form a second compression cavity, and the second compression cavity is communicated with the second oil outlet.

Furthermore, a second return spring is arranged at the bottom end of the second compression cavity, and when the second piston moves inwards to the limit position, the second piston presses the second return spring.

Furthermore, the end of the second piston is connected with a second piston rod, and the second piston rod extends out of the pump body.

In conclusion, the utility model has the following beneficial effects:

1. adopt two working chambers that are symmetrical arrangement, single working chamber compares the structure simpler with the cavity of traditional two effect braking main pumps, and the accessory variety is few in single working chamber, and the reliability is higher, makes things convenient for the processing and the maintenance of braking main pump.

2. In the two symmetrically arranged working cavities, the used parts are the same, so that the universal machining tool has good universality, and the universal parts can be machined faster in machining; and the same replacement parts can be conveniently found during maintenance.

3. The symmetrical working cavity structure is adopted, the two piston rods have quite long movement strokes, the overall movement stroke is further improved, parts in the cavity are few, more spaces for the pistons to move are reserved, and the main braking pump can adapt to various working conditions.

Drawings

FIG. 1 is a schematic cross-sectional structural view of a series double-acting brake main pump with symmetrically arranged pistons.

FIG. 2 is a schematic cross-sectional view of a symmetrically arranged piston tandem double acting brake master pump moving to an extreme position.

In the figure, 1, a pump body; 11. a first oil inlet hole; 12. a first oil outlet hole; 13. a second oil inlet hole; 14. a second oil outlet hole; 2. a first working chamber; 21. a first piston; 211. a first valve plate; 22. a first piston rod; 23. a first compensation chamber; 24. a first compression chamber; 241. a first return spring; 3. a second working chamber; 31. a second piston; 311. a second valve plate; 32. a second piston rod; 33. a second compensation chamber; 34. a second compression chamber; 341. a second return spring; 4. provided is a knuckle bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

Example (b):

a series double-acting brake main pump with symmetrically arranged pistons is shown in figure 1 and comprises a pump body 1, wherein a first oil inlet hole 11, a first oil outlet hole 12, a second oil inlet hole 13 and a second oil outlet hole 14 are formed in the pump body 1. The first oil inlet hole 11, the first oil outlet hole 12, the second oil inlet hole 13, and the second oil outlet hole 14 are arranged in the axial direction of the pump body 1.

Further, as shown in fig. 1, the pump body 1 is provided with a first working chamber 2 and a second working chamber 3, the first working chamber 2 and the second working chamber 3 are located on a central axis of the pump body 1, and the first working chamber 2 and the second working chamber 3 are arranged in a central symmetry manner with respect to the pump body 1. The first working cavity 2 is communicated with a first oil inlet hole 11 and a first oil outlet hole 12; the second working chamber 3 communicates with a second oil inlet hole 13 and a second oil outlet hole 14.

Further, as shown in fig. 1, a first piston 21 is telescopically arranged in the first working chamber 2, an end of the first piston 21 is connected with a first piston rod 22, an end of the first piston rod 22 is provided with a joint bearing 4, and the first piston rod 22 is used for connecting with an external transmission component. First valve block 211 is installed respectively at the both ends of first piston 21, and first valve block 211 offsets with 2 inner walls in first working chamber, and two first valve blocks 211 enclose into the cavity and be first compensation chamber 23 to first compensation chamber 23 communicates with first inlet port 11, and in the during operation, hydraulic oil pours into from first inlet port 11 and is full of first compensation chamber 23, promotes the inward movement of piston shape.

Further, as shown in fig. 1, a first valve plate 211 at the tail end of the first piston 21 and the tail portion of the first working chamber 2 enclose a chamber as a first compression chamber 24, the first compression chamber 24 is communicated with the first oil outlet 12, and when the piston is pushed to move inwards, hydraulic oil flows out from the first oil outlet 12. A first return spring 241 is provided on the bottom end of the first compression chamber 24, and the first piston 21 presses the first return spring 241 when the first piston 21 moves inward to the limit position. When the driver releases the brake pedal, at which time hydraulic pressure is lost, the first return spring 241 rebounds to urge the first piston 21 to return.

Further, as shown in fig. 1, a second piston 31 is telescopically arranged in the second working chamber 3, an end of the second piston 31 is connected with a second piston rod 32, an end of the second piston rod 32 is provided with a joint bearing 4, and the second piston rod 32 is used for connecting with an external transmission component. The two ends of the second piston 31 are respectively provided with a second valve plate 311, the second valve plates 311 are abutted against the inner wall of the second working chamber 3, and a chamber enclosed by the two second valve plates 311 is a second compensation chamber 33. The second compensation chamber 33 operates on the same principle as the first compensation chamber 23.

Further, as shown in fig. 1, a second compression chamber 34 is defined by a second valve plate 311 at the tail end of the second piston 31 and the tail end of the second working chamber 3, and the second compression chamber 34 is communicated with the second oil outlet 14. A second return spring 341 is provided on the bottom end of the second compression chamber 34, and the second piston 31 presses the second return spring 341 when the second piston 31 moves inward to the limit position. The second compression chamber 34 operates on the same principle as the first compression chamber 24.

The specific implementation process comprises the following steps:

when the driver depresses the brake pedal, as shown in fig. 2, hydraulic oil is injected into the first working chamber 2 and the second working chamber 3 from the first oil inlet and the second oil inlet, respectively, and then the first piston 21 and the second piston 31 are pushed to move inwards, and simultaneously the first piston rod 22 and the second piston rod 32 move synchronously. During the inward movement, the first piston 21 and the second piston 31 press the first return spring 241 and the second return spring 341, respectively. When the driver releases the brake pedal, the hydraulic oil flows back, at this time, the first piston 21 and the second piston 31 lose the hydraulic pressure effect, and the first return spring 241 and the second return spring 341 rebound to drive the first piston 21 and the second piston 31 to return.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a piston symmetrical arrangement connects in series double-acting braking main pump which characterized in that: the pump comprises a pump body, wherein a first working cavity and a second working cavity are formed in the pump body, the first working cavity and the second working cavity are symmetrically arranged around the center of the pump body, a first piston is telescopically arranged in the first working cavity, and a first oil inlet and a first oil outlet which are communicated with the first working cavity are formed in the pump body; the second piston is arranged in the second working cavity in a telescopic mode, and a second oil inlet hole and a second oil outlet hole which are communicated with the second working cavity are formed in the pump body.

2. A piston-symmetrically-arranged series double-acting brake main pump according to claim 1, wherein: first valve plates are respectively installed at two ends of the first piston and abut against the inner wall of the first working cavity, a cavity is defined by the two first valve plates to form a first compensation cavity, and the first compensation cavity is communicated with the first oil inlet.

3. A piston-symmetrically-arranged series double-acting brake main pump according to claim 2, wherein: a cavity is enclosed by the first valve plate at the tail end of the first piston and the tail part of the first working cavity and is a first compression cavity, and the first compression cavity is communicated with the first oil outlet.

4. A piston-symmetrically-arranged series double-acting brake main pump according to claim 3, wherein: and a first return spring is arranged at the bottom end of the first compression cavity, and when the first piston moves inwards to the limit position, the first piston extrudes the first return spring.

5. A piston-symmetrically-arranged series double-acting brake main pump according to claim 1, wherein: the end of the first piston is connected with a first piston rod, and the first piston rod extends out of the pump body.

6. A piston-symmetrically-arranged series double-acting brake main pump according to claim 1, wherein: and second valve plates are respectively installed at two ends of the second piston and are abutted against the inner wall of the second working cavity, the two second valve plates form a cavity as a second compensation cavity in a surrounding mode, and the second compensation cavity is communicated with the second oil inlet hole.

7. A piston-symmetrically-arranged series double-acting brake main pump according to claim 6, wherein: and a cavity surrounded by the second valve plate at the tail end of the second piston and the tail part of the second working cavity is a second compression cavity, and the second compression cavity is communicated with the second oil outlet.

8. A piston-symmetrically-arranged series double-acting brake main pump according to claim 7, wherein: and a second return spring is arranged at the bottom end of the second compression cavity, and when the second piston moves inwards to the limit position, the second piston extrudes the second return spring.

9. A piston-symmetrically-arranged series double-acting brake main pump according to claim 1, wherein: the end of the second piston is connected with a second piston rod, and the second piston rod extends out of the pump body.