CN115384465A

CN115384465A - Parking braking device

Info

Publication number: CN115384465A
Application number: CN202211207687.7A
Authority: CN
Inventors: 刘杰; 冯炜; 王大伟; 李津鹏; 曾奇峰
Original assignee: Special Vehicle Technology Center of Hubei Aerospace Technology Research Institute; Hubei Sanjiang Space Wanshan Special Vehicle Co Ltd
Current assignee: Special Vehicle Technology Center of Hubei Aerospace Technology Research Institute; Hubei Sanjiang Space Wanshan Special Vehicle Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-11-25

Abstract

The application relates to the technical field of automotive engineering, particularly, relate to a parking brake device, the device includes: the pump station is used for storing and conveying brake fluid; the pump station and the parking brake oil cylinder are connected with a return pipeline through a liquid conveying pipeline; and the valve group is connected between the pump station and the parking brake oil cylinder and used for adjusting the transmission of the brake fluid between the pump station and the parking brake oil cylinder. The technical scheme that this application provided can satisfy the parking braking requirement, can also avoid taking place the braking unusually at the in-process parking braking that traveles.

Description

Parking braking device

Technical Field

The application relates to the technical field of automobile engineering, in particular to a parking brake device.

Background

The parking brake adopts a bidirectional reinforcement structure, and a piston cylinder drives a pull wire to move to control the opening or closing of a brake shoe. When the parking brake is released, high-pressure liquid is introduced into the piston cylinder, a spring in the piston cylinder is compressed by brake fluid and contracts together with the pull wire, and the brake shoe is closed. Due to the integrated design of the brake drum and the hub motor rotor, the rotating speed is up to thousands of revolutions, and abnormal braking can not occur in the parking brake in the running process.

Therefore, a parking brake device is urgently needed by the technical personnel in the field, which can meet the requirements of parking brake and can avoid abnormal brake of the parking brake in the running process.

Disclosure of Invention

The embodiment of the application provides a parking braking device, can satisfy the parking braking requirement, can also avoid the parking braking to take place the abnormal braking in the driving process.

Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.

According to an aspect of an embodiment of the present application, there is provided a parking brake apparatus including: the pump station is used for storing and conveying brake fluid; the pump station and the parking brake cylinder are connected with a return pipeline through a liquid conveying pipeline; and the valve group is connected between the pump station and the parking brake oil cylinders and used for adjusting the brake fluid to be conveyed between the pump station and the parking brake oil cylinders.

In some embodiments of the present application, the pump station comprises: an oil tank for storing the brake fluid; the oil pump, the oil pump sets up in the oil tank with the infusion pipeline between the valve group.

In some embodiments of the present application, based on the foregoing solution, the pump station further includes: the oil absorption filter is arranged at the liquid outlet end of the oil tank and is used for filtering the brake liquid pumped out of the oil tank; and the oil return filter is arranged at the liquid inlet end of the oil tank and used for filtering and refluxing the brake liquid of the oil tank.

In some embodiments of the present application, the valve set comprises: and the manual hydraulic valve comprises a first interface and a second interface, and the manual hydraulic valve controls the flow direction of the brake fluid by switching the first interface and the second interface.

In some embodiments of the present application, based on the foregoing solution, the manual hydraulic valve controls the brake fluid to flow from the parking brake cylinder to the return line by switching the first interface to the second interface, so as to implement parking braking; and the manual hydraulic valve controls the brake fluid to flow to the parking brake oil cylinder through the infusion pipeline by switching the second interface to the first interface so as to relieve parking brake.

In some embodiments of the present application, the valve set further comprises: a first one-way valve disposed on the infusion line; a second one-way valve connected in series with the first one-way valve.

In some embodiments of the present application, based on the foregoing, the valve set further includes an accumulator disposed between the first check valve and the second check valve.

In some embodiments of the present application, based on the foregoing, the valve set further comprises: a first pressure switch disposed between the first check valve and the accumulator; a second pressure switch disposed between the second check valve and the accumulator.

In some embodiments of the present application, the valve set further comprises: the valve bank inlet pressure reducing valve is arranged at the valve bank inlet and used for reducing the liquid pressure entering the valve bank.

In some embodiments of the present application, the valve set further comprises: and the overflow valve is arranged on a return pipeline between the pump station and the parking brake oil cylinder and used for pressure relief.

Based on the scheme, the application has at least the following advantages or progresses:

in the technical scheme that some embodiments of this application provided, the pump station with the parking braking hydro-cylinder passes through the infusion pipeline and the return line is connected, is adjusting through the valve group the brake fluid is in the pump station with transport between the parking braking hydro-cylinder for the brake fluid can be carried to the parking braking hydro-cylinder as required, perhaps flows back to the pump station from the parking braking hydro-cylinder, and the parking braking device reasonable in design that this application provided, principle function is reliable and stable, can satisfy the parking braking requirement, can also avoid taking place the abnormal braking at the in-process parking braking of traveling.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

fig. 1 shows a schematic construction of a parking brake device during driving according to an embodiment of the application;

FIG. 2 illustrates a simplified structural diagram of a parking brake device during a parking maneuver in accordance with an embodiment of the present application;

fig. 3 shows a schematic structural diagram of a parking brake device according to an embodiment of the present application.

The specific reference numbers are as follows:

a pump station 1; a parking brake cylinder 2;

a valve group 3; a transfusion pipeline 4;

a return line 5; a fuel tank 101;

an oil pump 102; an oil absorption filter 103;

a return oil filter 104; manual hydraulic valve 301;

a first check valve 302; a second check valve 303;

an accumulator 304; a first pressure switch 305;

a second pressure switch 306; a valve block inlet relief valve 307;

relief valve 308; a first interface 30101;

a second interface 30102.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.

It should be noted that: reference herein to "a plurality" means two or more. "and/or" describe the association relationship of the associated objects, meaning that there may be three relationships, e.g., A and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Please refer to fig. 1.

Fig. 1 shows a schematic structural diagram of a parking brake device during driving according to an embodiment of the present application, which may include, as shown in fig. 1: the pump station 1 is used for storing and conveying brake fluid; the parking brake cylinder 2, the pump station 1 and the parking brake cylinder 2 are connected through a liquid conveying pipeline 4 and a return pipeline 5; and the valve group 3 is connected between the pump station 1 and the parking brake oil cylinders 2 and used for adjusting the brake fluid transmission between the pump station 1 and the parking brake oil cylinders 2.

With continued reference to fig. 1, the pump station 1 may comprise: an oil tank 101, the oil tank 101 being configured to store the brake fluid; and the oil pump 102 is arranged on the liquid conveying pipeline 4 between the oil tank 101 and the valve group 3.

In the present application, the oil pump 102 may be an electric pump.

With continued reference to fig. 1, the pump station 1 may further comprise: the oil absorption filter 103 is arranged at the liquid outlet end of the oil tank 101, and is used for filtering the brake liquid pumped out of the oil tank 101; and the oil return filter 104 is arranged at the liquid inlet end of the oil tank 101, and is used for filtering the brake fluid which flows back to the oil tank 101.

In the present application, since the brake fluid runs through the parking brake device, some impurities are easily introduced during the flowing process, so that the brake fluid flowing back to the oil tank 101 or the pumped brake fluid can be filtered to ensure the cleanness and stability of the brake fluid.

In addition, in the present application, a cartridge alarm device (not shown in fig. 1) may be provided for the oil suction filter 103 and the oil return filter 104, and the cartridge alarm device may signal a cartridge replacement if the effective filter specific surface area of the cartridge is insufficient to support continued filtration.

With continued reference to fig. 1, the valve group 3 may include: the manual hydraulic valve 301 comprises a first interface 30101 and a second interface 30102, and the manual hydraulic valve 301 controls the flow direction of the brake fluid by switching the first interface 30101 and the second interface 30102.

As shown in fig. 1, during driving, the manual hydraulic valve 301 is switched to the first interface 30101, the first interface 30101 is connected to the infusion pipeline 4, brake fluid enters the parking brake cylinder 2, and the parking state is released.

With continued reference to fig. 1, the valve set 3 may further include: a first one-way valve 302, said first one-way valve 302 being positionable on said infusion line; a second one-way valve 303, said second one-way valve 303 and said first one-way valve 302 may be connected in series; an accumulator 304, the accumulator 304 may be disposed between the first check valve 302 and the second check valve 303.

With continued reference to fig. 1, the valve set 3 may further include: a first pressure switch 305, said first pressure switch 305 being disposed between said first one-way valve 302 and said accumulator 304; a second pressure switch 306, said second pressure switch 306 being disposed between said second one-way valve 303 and said accumulator 304.

In the application, by arranging the energy accumulator 304, a part of brake fluid can be stored, and when the manual hydraulic valve 301 has a fault, a certain hydraulic pressure can be provided, so that accidental parking is avoided. The number of the energy accumulators can be determined according to the requirement and the volume of the selected energy accumulators, so that the number of the energy accumulators can be reduced by selecting the energy accumulator with large volume.

Further, by providing the first check valve 302, the flow direction of the brake fluid is ensured when the brake fluid flows into the accumulator 304, and by providing the second check valve 303, the direction in which the brake fluid is delivered to the parking brake cylinder 2 is ensured when the brake fluid flows out of the accumulator 304.

In this application, by setting the first pressure switch 305 and the second pressure switch 306, the operation of the pump station 1 can be controlled according to the pressures of the first pressure switch 305 and the second pressure switch 306, the critical pressure of the first pressure switch 305 and the critical pressure of the second pressure switch 306 can be set to a buffer range, when the hydraulic pressure in the pipeline is lower than the minimum value of the critical pressure, the pump station 1 can pump out the brake fluid, and when the hydraulic pressure in the pipeline is higher than or equal to the maximum value of the critical pressure, the pump station 1 can stop pumping out the brake fluid.

In this application, critical pressure minimum can be 4Mpa, critical pressure maximum can be 5Mpa, and when the pressure in the pipeline was less than 4Mpa promptly, pump station 1 can pump brake fluid, when the pressure in the pipeline was higher than or equal to 5Mpa, pump station 1 can stop pumping brake fluid.

With continued reference to fig. 1, the valve set 3 may further include: and the valve group inlet reducing valve 307 is arranged at the inlet of the valve group 3, and is used for reducing the liquid pressure entering the valve group.

In this application, the safe working pressure of the valve group 3 can be set, and the valve group inlet pressure reducing valve 307 adjusts the opening degree thereof through the change of the pressure, thereby meeting the requirement of the safe working pressure and ensuring the normal work of the valve group 3.

With continued reference to fig. 1, the valve set 3 may further include: and the overflow valve 308 is arranged on the return pipeline 5 between the pump station 1 and the parking brake cylinder 2 and used for pressure relief.

In this application, if parking brake cylinder 2 abnormal pressure rises or when the pipeline takes place to block up, overflow valve 308 can change according to hydraulic pressure, switches to the normal open pipeline, and direct switch-on parking brake cylinder 2 and return line 5 relieve pressure in real time, ensure device safety, not damaged.

Please refer to fig. 2.

Fig. 2 shows a schematic structural diagram of a parking brake device in an embodiment of the present application during parking, as shown in fig. 2, in order to implement parking brake, an occupant may switch the manual hydraulic valve 301 to the second port 30102 while the manual hydraulic valve 301 keeps the second port 30102 connected to the infusion line 4, at this time, the infusion line 4 is cut off, the parking brake cylinder 2 is connected to the return line 5 through the second port 30102 and is kept for about 5 seconds, and brake fluid in the parking brake cylinder 2 flows back to the oil tank 101 to implement parking.

Please refer to fig. 3.

Fig. 3 shows a schematic structural diagram of a parking brake device according to an embodiment of the present application, as shown in fig. 3, during a driving process, if an unexpected fault occurs, brake fluid in a pump station 1 cannot provide sufficient hydraulic pressure for a parking brake cylinder 2, at this time, the brake fluid stored in an accumulator 304 flows to the parking brake cylinder 2 according to the limitation of two one-way valves, so as to provide sufficient hydraulic pressure for the parking brake cylinder 2 for a certain time, so as to avoid an unexpected parking, in addition, a pressure alarm device may be provided in front of the parking brake cylinder 2, once the detected pressure is smaller than a predetermined value, it is indicated that the parking brake cylinder 2 starts to lose pressure, an unexpected parking may occur at any time, and at this time, an alarm may be sent immediately to remind a driver and passengers.

In conclusion, in the technical scheme that some embodiments of this application provided, pump station 1 with parking brake cylinder 2 passes through transfusion pipeline 4 and return line 5 and connects, is adjusting through valve group 3 brake fluid is in pump station 1 with transport between the parking brake cylinder 2 for brake fluid can carry to parking brake cylinder 2 as required, perhaps flows back to pump station 1 from among parking brake cylinder 2, the parking brake device reasonable in design that this application provided, principle function is reliable and stable, can satisfy the parking brake requirement, can also avoid taking place the abnormal braking at the in-process parking brake that traveles.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A parking brake apparatus, characterized in that the apparatus comprises:

the pump station is used for storing and conveying brake fluid;

the pump station and the parking brake oil cylinder are connected with a return pipeline through a liquid conveying pipeline;

and the valve group is connected between the pump station and the parking brake oil cylinder and used for adjusting the transmission of the brake fluid between the pump station and the parking brake oil cylinder.

2. The apparatus according to claim 1, wherein the pump station comprises:

an oil tank for storing the brake fluid;

the oil pump, the oil pump set up in the oil tank with the infusion pipeline between the valve group.

3. The apparatus according to claim 2, wherein the pump station further comprises:

the oil absorption filter is arranged at the liquid outlet end of the oil tank and is used for filtering the brake liquid pumped out of the oil tank;

and the oil return filter is arranged at the liquid inlet end of the oil tank and used for filtering and refluxing the brake liquid of the oil tank.

4. The apparatus of claim 1, wherein the valve set comprises a manual hydraulic valve including a first interface and a second interface, the manual hydraulic valve controlling the flow direction of the brake fluid by switching the first interface and the second interface.

5. The apparatus of claim 4, wherein said manual hydraulic valve controls flow of said brake fluid from said parking brake cylinder to said return line by switching said first interface to said second interface to apply parking brakes; and the manual hydraulic valve controls the brake fluid to flow to the parking brake oil cylinder through the infusion pipeline by switching the second interface to the first interface so as to relieve parking brake.

6. The apparatus of claim 1, wherein the valve set further comprises:

a first one-way valve disposed on the infusion line;

a second check valve connected in series with the first check valve.

7. The apparatus of claim 6, wherein the valve block further comprises an accumulator disposed between the first one-way valve and the second one-way valve.

8. The apparatus of claim 7, wherein the valve set further comprises:

a first pressure switch disposed between the first check valve and the accumulator;

a second pressure switch disposed between the second one-way valve and the accumulator.

9. The apparatus of claim 1, wherein the valve set further comprises:

the valve bank inlet pressure reducing valve is arranged at the valve bank inlet and used for reducing the liquid pressure entering the valve bank.

10. The apparatus of claim 1, wherein the valve set further comprises:

and the overflow valve is arranged on a return pipeline between the pump station and the parking brake oil cylinder and used for pressure relief.