CN114475554A

CN114475554A - Pressure generating device of automobile integrated electro-hydraulic braking system

Info

Publication number: CN114475554A
Application number: CN202210247992.2A
Authority: CN
Inventors: 刘海超; 魏凌涛
Original assignee: Beijing Yingchuang Huizhi Technology Co ltd
Current assignee: Beijing Yingchuang Huizhi Technology Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-05-13

Abstract

The invention discloses a pressure generating device of an automobile integrated type electro-hydraulic braking system, which comprises a ball screw transmission assembly, a main cylinder and a hollow shaft motor, wherein a nut and a screw are arranged inside the ball screw transmission assembly, a rotor is fixedly arranged on the screw through a bolt and a clamping ring, the rotor is fixedly connected to the surface of a shell of the hollow shaft motor through a bearing and a flange plate, and a first buffer rubber is arranged on the surface of the rotor. The first advantage of the invention is realized on the basis that the motor is hollow, a plurality of parts such as the ball screw transmission assembly, the guide sleeve and the piston are positioned in the center of the motor when in a stroke limit position, so that the space is effectively utilized, the high integration is realized, the second advantage is realized on the basis of the characteristic of high integration, the rotor is connected with the screw rod, an additional transmission mechanism is not needed, the motor is electrified, the screw rod rotates together while the rotor rotates, and no transmission mechanism is used for realizing the purposes of improving the production efficiency, reducing the cost and the like.

Description

Pressure generating device of automobile integrated electro-hydraulic braking system

Technical Field

The invention relates to the technical field of automobile brake control, in particular to a pressure generating device of an automobile integrated type electro-hydraulic brake system.

Background

The automobile brake system is subjected to mechanical braking and vacuum-assisted braking, and is continuously developed to electronization and high integration. The integration of an electronic brake boosting system and an electronic body stability control system is considered to be a necessary trend of future automotive brake systems.

However, in the prior art, in the actual use, the motor and the hydraulic cylinder are often designed separately in the scheme that the existing hollow shaft motor drives the screw rod piston or the nut piston, so that the overall product size is large, the integration degree is low, and disadvantages exist in the product cost and the production process complexity degree.

Disclosure of Invention

The invention aims to provide a pressure generating device of an integrated electro-hydraulic brake system of an automobile, which is used for solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a car integrated form electric hydraulic brake system pressure generating device, includes ball transmission assembly, master cylinder and hollow shaft motor, ball transmission assembly's inside is provided with nut and lead screw, the lead screw passes through the fixed rotor that is provided with of bolt and snap ring, the rotor passes through bearing and flange fixed connection at the housing face of hollow shaft motor, the surface of rotor is provided with cushion rubber one.

Preferably, one end of the nut is fixedly provided with a piston.

Preferably, an end cover is arranged at the tail end of the hollow shaft motor, the end cover is connected with the hollow shaft motor through a screw, and a first sealing ring is arranged between the end cover and the hollow shaft motor.

Preferably, one end of the rotor is provided with an angle sensor rotor, and the inner wall of the hollow shaft motor is fixedly provided with an angle sensor assembly.

Preferably, the end surface of the hollow shaft motor is provided with a guide sleeve, and the surface of the master cylinder is fixedly provided with the guide sleeve.

Preferably, the outer wall of the main cylinder is provided with a sealing groove, and a second sealing ring is arranged on the sealing groove to seal the piston and the main cylinder.

Preferably, the inner wall of the main cylinder is provided with a sealing groove provided with a third sealing ring and a fourth sealing ring to realize sealing between the piston and the main cylinder.

Preferably, the bottom of the inner wall of the main cylinder is fixedly provided with a second buffer rubber through a bolt.

Compared with the prior art, the invention has the beneficial effects that:

the design of the motor and the electric pressure master cylinder is highly integrated, so that the overall dimension of the integrated electro-hydraulic brake system can be effectively reduced; the number of integral parts is reduced, the difficulty of a product assembly process is reduced, the production efficiency of the whole product machine is improved, the cost of the whole machine is reduced, the buffer devices are arranged at the working limit positions of the nuts, the working noise of the product is reduced to a greater extent, in addition, the rigid collision between the parts is reduced, the service life of the product is prolonged to a certain extent, the rotor is positioned and supported by two bearings, the bearing capacity and the stability of the rotor are more advantageous, and the motor wiring penetrates out of the joint surface of the motor and the valve block to the other side, so that the structure is more compact and the appearance is attractive;

the invention can also realize that the rotor can realize the target function by fixing and supporting the bearing, but in order to improve the bearing capacity and the stability, the design of another bearing is added, so that the cantilever beam structure is changed into a structure similar to a simple supporting beam, and the wiring of the motor penetrates out of the joint surface of the wiring of the motor and the valve block to the other surface, so that the structure is more compact and the appearance is attractive.

Drawings

FIG. 1 is a front cross-sectional schematic view of the overall structure of a pressure generating device of an integrated electro-hydraulic brake system of an automobile.

In the figure: 1. an end cap; 2. a first sealing ring; 7. a hollow shaft motor; 8. a rotor; 9. a first buffer rubber; 10. a nut; 11. a lead screw; 15. an angle sensor rotor; 16. an angle sensor assembly; 17. a guide sleeve; 18. a master cylinder; 19. a second buffer rubber; 21. a second sealing ring; 23. a third sealing ring; 24. a piston; 27. a fourth sealing ring; 31. ball screw drive assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides an automobile integrated form electricity liquid braking system pressure generating device, includes ball transmission assembly 31, master cylinder 18 and hollow shaft motor 7, and the inside of ball transmission assembly 31 is provided with nut 10 and lead screw 11, and lead screw 11 has rotor 8 through bolt and snap ring fixed mounting, and rotor 8 passes through bearing and flange dish fixed mounting at the housing surface of hollow shaft motor 7, and rotor 8's surface is provided with cushion rubber 9.

A piston 24 is fixedly mounted at one end of the nut 10.

An end cover 1 is arranged at the tail end of the hollow shaft motor 7, the end cover 1 is connected with the hollow shaft motor 7 through a screw, and a first sealing ring 2 is arranged between the end cover 1 and the hollow shaft motor 7.

An angle sensor rotor 15 is arranged at one end of the rotor 8, and an angle sensor assembly 16 is fixedly arranged on the inner wall of the hollow shaft motor 7.

The end face of the hollow shaft motor 7 is provided with 26, and the surface of the main cylinder 18 is fixedly provided with a guide sleeve 17.

The outer wall of the main cylinder 18 is provided with a sealing groove, and a second sealing ring 21 is arranged on the sealing groove to realize sealing between the piston 24 and the main cylinder 18.

The inner wall of the main cylinder 18 is provided with a sealing groove provided with a third sealing ring 23 and a fourth sealing ring 27 to realize the sealing between the piston 24 and the main cylinder 18.

The bottom of the inner wall of the main cylinder 18 is fixedly provided with a second buffer rubber 19 through bolts.

The working principle is as follows: when in use, the first advantage of the invention is realized based on the fact that the motor is hollow 8, a plurality of parts such as the ball screw transmission assembly 31, the guide sleeve 17, the piston 24 and the like are positioned in the center of the motor when in a stroke limit position, thereby effectively utilizing space, realizing high integration, and the second advantage is realized based on the characteristic of high integration, the rotor 8 is connected with the screw rod 11, no additional transmission mechanism is needed, the motor is electrified, the screw rod 11 rotates together when the rotor 8 rotates, no transmission mechanism is used for realizing the improvement of production efficiency, the reduction of cost and the like, the third advantage expressed in the figure is not difficult to understand, when the piston 24 linearly moves to the limit position, the first buffer rubber 9 and the second buffer rubber 19 are buffer devices, the invention can also realize that the target function can be realized by fixedly supporting the rotor 11 with a bearing, but in order to improve bearing capacity and stability, and the design of another bearing is added, so that the cantilever beam structure is changed into a structure similar to a simple beam, and the motor wiring penetrates out of the other surface from the joint surface of the motor wiring and the valve block, so that the structure is more compact and the appearance is attractive.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automobile integrated form electrohydraulic braking system pressure generating device, includes ball transmission assembly (31), master cylinder (18) and hollow shaft motor (7), its characterized in that: the ball screw transmission assembly is characterized in that a nut (10) and a screw (11) are arranged inside the ball screw transmission assembly (31), the screw (11) is fixedly provided with a rotor (8) through a bolt and a clamping ring, the rotor (8) is fixedly connected to the surface of a shell of the hollow shaft motor (7) through a bearing and a flange plate, and the surface of the rotor (8) is provided with a first buffer rubber (9).

2. The integrated electro-hydraulic brake system pressure generating device of the automobile as claimed in claim 1, wherein: and one end of the nut (10) is fixedly provided with a piston (24).

3. The integrated electro-hydraulic brake system pressure generating device of the automobile as claimed in claim 1, wherein: the end of the hollow shaft motor (7) is provided with an end cover (1), the end cover (1) is connected with the hollow shaft motor (7) through a screw, and a first sealing ring (2) is arranged between the end cover (1) and the hollow shaft motor (7).

4. The pressure generating device of the integrated electro-hydraulic brake system of the automobile as claimed in claim 1, wherein: an angle sensor rotor (15) is arranged at one end of the rotor (8), and an angle sensor assembly (16) is fixedly arranged on the inner wall of the hollow shaft motor (7).

5. The integrated electro-hydraulic brake system pressure generating device of the automobile as claimed in claim 1, wherein: the end face of the hollow shaft motor (7) is provided with a guide sleeve (17), and the surface of the main cylinder (18) is fixedly provided with a guide sleeve (26).

6. The integrated electro-hydraulic brake system pressure generating device of the automobile as claimed in claim 1, wherein: the outer wall of the main cylinder (18) is provided with a sealing groove, and a second sealing ring (21) is arranged on the sealing groove to realize sealing between the piston (24) and the main cylinder (18).

7. The pressure generating device of the integrated electro-hydraulic brake system of the automobile as claimed in claim 1, wherein: the inner wall of the main cylinder (18) is provided with a sealing groove provided with a third sealing ring (23) and a fourth sealing ring (27) to realize sealing between the piston (24) and the main cylinder (18).

8. The pressure generating device of the integrated electro-hydraulic brake system of the automobile as claimed in claim 1, wherein: and a second buffer rubber (19) is fixedly arranged at the bottom of the inner wall of the main cylinder (18) through bolts.