CN114475548A

CN114475548A - Pneumatic brake device of automobile

Info

Publication number: CN114475548A
Application number: CN202011143658.XA
Authority: CN
Inventors: 张司博; 王大江; 冯扶民; 王金祥; 罗利军; 刘立志; 张宇; 刘进伟; 闫凯; 张志男
Original assignee: Qinhuangdao Tianye Tolian Heavy Industry Co Ltd
Current assignee: Qinhuangdao Tianye Tolian Heavy Industry Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2022-05-13

Abstract

The embodiment of the application provides a pneumatic brake device of an automobile, which comprises a first pneumatic pipeline overflow stop valve, a second pneumatic pipeline overflow stop valve, a third pneumatic pipeline overflow stop valve, a fourth pneumatic pipeline overflow stop valve, a first hose, a second hose and a pneumatic brake, wherein the first hose is connected with the second hose; the pneumatic brake comprises a service brake cavity and a parking brake cavity; the first and second pneumatic pipeline overflow stop valves are installed on the frame in parallel, and air inlets of the first and second pneumatic pipeline overflow stop valves are communicated with each other through a guide pipe and then connected with the pneumatic brake loop; the third and the fourth pneumatic pipeline overflow stop valves and the pneumatic brake are arranged on the wheel set, and the air outlets of the third and the fourth pneumatic pipeline overflow stop valves are communicated with each other through a guide pipe and then communicated with a service brake cavity of the pneumatic brake; the gas outlet of the first stop pneumatic pipeline flow valve is connected with the gas inlet of the third pneumatic pipeline overflow stop valve through a first hose, and the gas outlet of the second pneumatic pipeline overflow stop valve is connected with the gas inlet of the fourth pneumatic pipeline overflow stop valve through a second hose. The pneumatic brake device of the automobile can also perform effective braking under the condition that the hose is broken.

Description

Pneumatic brake device of automobile

Technical Field

The embodiment of the application relates to the technical field of automobiles, in particular to a pneumatic braking device of an automobile.

Background

The engineering vehicle is a construction engineering tool vehicle used for carrying, excavating, rush-repair and even combat of engineering, and common engineering vehicles comprise heavy transport vehicles, large cranes, excavators, bulldozers, road rollers, loaders, electric power rush-repair vehicles, engineering rush-repair vehicles, government special engineering vehicles, off-road engineering vehicles, electric welding engineering vehicles, armored engineering vehicles (fighting engineering vehicles), hoisting machinery, oxidant sewage treatment engineering vehicles and the like.

In particular, electromechanical hydraulic-pneumatic systems of metallurgical frame vehicles, flat cars, modular cars and the like are not complex and are all integrated on the frame and the axle, and the load capacity of the hydraulic-pneumatic system is mostly in a multi-axle driving, braking and steering working mode. The suspension between each axis and the workshop is driven by a hydraulic cylinder to drive the frame and the goods on the frame to lift, and the brake pipeline needs a section of hose to meet the requirement of lifting action. In the case of severe working environment, the hose is likely to break, and the brake is impossible, so that casualties and economic losses are caused.

Disclosure of Invention

In view of the above, embodiments of the present application provide a pneumatic brake device for an automobile, which overcomes or at least partially solves the above problems.

According to an aspect of an embodiment of the present application, there is provided a pneumatic brake device for an automobile, including first, second, third, and fourth pneumatic line excess flow stop valves, a first hose, a second hose, and a pneumatic brake;

the first, second, third and fourth pneumatic pipeline overflow stop valves are all used for stopping pipelines and preventing the pipelines from flowing when the flow of oil in the pipelines exceeds a preset value;

the pneumatic brake comprises a service brake cavity and a parking brake cavity;

the first and second pneumatic pipeline overflow stop valves are installed on the frame in parallel, and air inlets of the first and second pneumatic pipeline overflow stop valves are communicated with each other through a guide pipe and then connected with the pneumatic brake circuit;

the third and fourth pneumatic pipeline overflow stop valves and the pneumatic brake are mounted on the wheel set, and the air outlets of the third and fourth pneumatic pipeline overflow stop valves are communicated with each other through a guide pipe and then communicated with the service brake cavity of the pneumatic brake;

the air outlet of the first stop pneumatic pipeline flow valve is connected with the air inlet of the third pneumatic pipeline overflow stop valve through the first hose, and the air outlet of the second pneumatic pipeline overflow stop valve is connected with the air inlet of the fourth pneumatic pipeline overflow stop valve through the second hose.

Optionally, the air inlets of the first pneumatic pipeline overflow stop valve and the second pneumatic pipeline overflow stop valve are connected in parallel through a three-way pipe.

Optionally, the air outlets of the third and fourth pneumatic pipeline overflow stop valves are connected in parallel through a three-way pipe.

Optionally, the first hose and the second hose are arranged along a work vehicle suspension, and move along with the work vehicle suspension during suspension lifting.

Optionally, the first and second pneumatic pipeline overflow stop valves have the same model, and the third and fourth pneumatic pipeline overflow stop valves have the same model.

Optionally, the first and second pneumatic pipeline overflow stop valves each include two independent closed chambers, one of the closed chambers is used for circulation of brake gas, and the other closed chamber is communicated with a conduit on an air inlet of the respective pneumatic pipeline overflow stop valve through a conduit.

Optionally, the third and fourth pneumatic pipeline overflow stop valves each include two independent closed chambers, one of the closed chambers is used for circulation of brake gas, and the other closed chamber is communicated with the conduit on the gas outlet of each pneumatic pipeline overflow stop valve through a conduit.

The pneumatic brake device for the automobile described in the above embodiment can also perform effective braking in the case of a hose break through two parallel brake lines.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a pneumatic brake device of an automobile according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1, a schematic structural diagram of a pneumatic brake device of an automobile according to an embodiment of the present application is shown, where the automobile may be an engineering vehicle, and the pneumatic brake device of the automobile includes a first pneumatic pipeline overflow stop valve 1, a second pneumatic pipeline overflow stop valve 2, a first hose 3, a second hose 4, a third pneumatic pipeline overflow stop valve 5, a fourth pneumatic pipeline overflow stop valve 6, a pneumatic brake 7, and a parking brake pipe 8.

When the first pneumatic pipeline overflow stop valve 1, the second pneumatic pipeline overflow stop valve 2, the third pneumatic pipeline overflow stop valve 5 and the fourth pneumatic pipeline overflow stop valve 6 are all used for enabling the flow of oil in the pipeline to exceed a preset value, the pipelines are stopped and do not circulate.

One side of the pneumatic brake 7 is a service brake chamber 71, and the other side is a parking brake chamber 72.

The first pneumatic pipeline overflow stop valve 1 and the second pneumatic pipeline overflow stop valve 2 are installed on the frame in parallel, air inlets of the first pneumatic pipeline overflow stop valve 1 and the second pneumatic pipeline overflow stop valve 2 are communicated with each other through a guide pipe, for example, the air inlets of the first pneumatic pipeline overflow stop valve 1 and the second pneumatic pipeline overflow stop valve 2 are connected with two pipes of a three-way pipe through respective guide pipes, and the last pipe of the three-way pipe is connected with a pneumatic brake loop.

For example, the first pneumatic pipeline overflow stop valve 1 and the second pneumatic pipeline overflow stop valve 2 each include two independent closed chambers, one of the closed chambers is used for the circulation of brake gas, and the other closed chamber is communicated with a conduit on an air inlet of the respective pneumatic pipeline overflow stop valve through a conduit.

The third pneumatic pipeline overflow stop valve 5, the fourth pneumatic pipeline overflow stop valve 6 and the pneumatic brake 7 are installed on a wheel set, and the air outlets of the third pneumatic pipeline overflow stop valve 5 and the fourth pneumatic pipeline overflow stop valve 6 are communicated with each other through a guide pipe and then communicated with the pneumatic brake 7, for example, the air inlets of the third pneumatic pipeline overflow stop valve 5 and the fourth pneumatic pipeline overflow stop valve 6 are connected with two pipes of a three-way pipe through respective guide pipes, the last pipe of the three-way pipe is communicated with the pneumatic brake 7, for example, the air outlets of the third pneumatic pipeline overflow stop valve 5 and the fourth pneumatic pipeline overflow stop valve 6 are connected in parallel with the service brake chamber 71 of the pneumatic brake 7 through the three-way pipe.

For example, the third pneumatic pipeline overflow stop valve 5 and the fourth pneumatic pipeline overflow stop valve 6 each include two independent closed chambers, one of the closed chambers is a circulation chamber for circulation of brake gas, and the other closed chamber is an adjustment chamber and is communicated with the conduit on the gas outlet of the respective pneumatic pipeline overflow stop valve through a conduit.

The air outlet of the first stop pneumatic pipeline flow valve 1 is connected with the air inlet of the third pneumatic pipeline overflow stop valve 5 through the first hose 3, and the air outlet of the second pneumatic pipeline overflow stop valve 2 is connected with the air inlet of the fourth pneumatic pipeline overflow stop valve 6 through the second hose 4.

In another embodiment of the present application, the parking brake pipe 8 communicates with the parking brake chamber 72 of the pneumatic brake 7.

In another embodiment of the present application, the first hose 3 and the second hose 4 may be rubber hoses, and the first hose 3 and the second hose 4 are arranged along the suspension of the engineering vehicle and move along with the suspension during lifting and lowering of the suspension.

In another embodiment of the present application, the first pneumatic pipeline overflow stop valve 1 and the second pneumatic pipeline overflow stop valve 2 have the same model, and the third pneumatic pipeline overflow stop valve 5 and the fourth pneumatic pipeline overflow stop valve 6 have the same model.

In another embodiment of the present application, the first pneumatic pipeline overflow stop valve 1, the second pneumatic pipeline overflow stop valve 2, the third pneumatic pipeline overflow stop valve 5, and the fourth pneumatic pipeline overflow stop valve 6 may be the same in type.

The operation of the pneumatic brake device of the vehicle can be mainly as follows.

In the running process of a vehicle, unexpected conditions such as breaking a brake pneumatic pipeline between a frame and a brake wheel set by materials and the like can occur, so that brake failure is caused. When a vehicle brakes during running, if one brake hose is broken, for example, the first hose 3 is broken, the outlet pressure of the first pneumatic pipeline overflow stop valve 1 is atmospheric pressure, the first pneumatic pipeline overflow stop valve 1 automatically detects the pressure difference between the inlet and the outlet of the first pneumatic pipeline overflow stop valve 1, the left circulation cavity is switched to the right regulation cavity to work, the right regulation cavity has a throttling function, the inlet of the first pneumatic pipeline overflow stop valve 1 has a certain pressure, and a small amount of gas leaks from the first pneumatic pipeline overflow stop valve 1; at this time, the second hose 4 behind the second pneumatic pipeline overflow stop valve 2 connected in parallel with the inlet of the first pneumatic pipeline overflow stop valve 1 is not broken, the brake gas enters a three-way joint connected in parallel with the third pneumatic pipeline overflow stop valve 5 through the second pneumatic pipeline overflow stop valve 2, the second hose 4 and the fourth gas through the pneumatic pipeline overflow stop valve 6, the brake gas is divided into two paths, one path of the brake gas enters the third pneumatic pipeline overflow stop valve 5, the third pneumatic pipeline overflow stop valve 5 detects the front-back pressure difference of the third pneumatic pipeline overflow stop valve 5, because the first hose 3 is broken, the valve port connected with the first hose 3 is atmospheric pressure, the third pneumatic pipeline overflow stop valve 5 is reversed, namely, the regulating cavity at the right position of the third pneumatic pipeline overflow stop valve 5 works, and only little gas leaks through the orifice of the regulating cavity at the right position of the third pneumatic pipeline overflow stop valve 5, at the moment, the third pneumatic pipeline overflow stop valve 5 and the fourth gas have certain pressure through the gas in the three-way joint of the gas outlet of the pneumatic pipeline overflow stop valve 6, and the other path of gas enters the pneumatic brake 7 to generate braking torque to stop the vehicle.

Similarly, when the vehicle brakes during running, if one brake hose is broken, for example, the second hose 4 is broken, the pressure at the outlet of the second pneumatic pipeline overflow stop valve 2 is atmospheric pressure, the second pneumatic pipeline overflow stop valve 2 can automatically detect the pressure difference between the inlet and the outlet of the second pneumatic pipeline overflow stop valve, and is switched from the left circulation cavity to the right regulation cavity to work, the right regulation cavity has a throttling function, the inlet of the second pneumatic pipeline overflow stop valve 2 has a certain pressure, and a small amount of gas leaks from the second pneumatic pipeline overflow stop valve 2; at the moment, the first hose 3 behind the first pneumatic pipeline overflow stop valve 1 connected in parallel with the inlet of the second pneumatic pipeline overflow stop valve 2 is not broken, the brake gas enters a three-way joint connected in parallel with the fourth pneumatic pipeline overflow stop valve 6 through the first pneumatic pipeline overflow stop valve 1, the first hose 3 and the third pneumatic pipeline overflow stop valve 5, the brake gas is divided into two paths, one path of the brake gas enters the fourth pneumatic pipeline overflow stop valve 6, the fourth pneumatic pipeline overflow stop valve 6 detects the front-back pressure difference of the brake gas, because the second hose 4 is broken, the valve port connected with the second hose 4 is atmospheric pressure, the fourth pneumatic pipeline overflow stop valve 6 is reversed, namely the right regulating cavity of the fourth pneumatic pipeline overflow stop valve 6 works, only less gas leaks through the orifice of the right regulating cavity of the fourth pneumatic pipeline overflow stop valve 6, at the moment, the gas in the three-way joint of the gas outlets of the third pneumatic pipeline overflow stop valve 5 and the fourth pneumatic pipeline overflow stop valve 6 has certain pressure, and the other path of the gas enters the pneumatic brake 7 to generate braking torque to stop the vehicle.

In summary, the pneumatic braking device for an automobile described in the above embodiments can perform effective braking in case of a hose break through two parallel braking lines.

Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. The pneumatic braking device of the automobile is characterized by comprising a first pneumatic pipeline overflow stop valve, a second pneumatic pipeline overflow stop valve, a third pneumatic pipeline overflow stop valve, a fourth pneumatic pipeline overflow stop valve, a first hose, a second hose and a pneumatic brake;

the first and second pneumatic pipeline overflow stop valves are installed on the frame in parallel, and air inlets of the first and second pneumatic pipeline overflow stop valves are communicated with each other through a guide pipe and then connected with a pneumatic brake loop;

the third and fourth pneumatic pipeline overflow stop valves and the pneumatic brake are installed on the wheel set, and air outlets of the third and fourth pneumatic pipeline overflow stop valves are communicated with each other through a guide pipe and then communicated with the service brake cavity of the pneumatic brake;

2. The pneumatic automobile brake device according to claim 1, wherein the air inlets of the first and second pneumatic line overflow cut-off valves are connected in parallel through a tee pipe.

3. The pneumatic automobile brake device according to claim 1, wherein the air outlets of the third and fourth pneumatic line overflow cut-off valves are connected in parallel through a tee pipe.

4. The pneumatic automobile brake device of claim 1, wherein the first hose and the second hose are disposed along a work vehicle suspension and move with the work vehicle suspension during lifting and lowering of the work vehicle suspension.

5. The pneumatic automobile brake system of claim 1, wherein the first and second pneumatic line overflow shutoff valves are of the same type, and the third and fourth pneumatic line overflow shutoff valves are of the same type.

6. The pneumatic brake system of claim 1, wherein the first and second pneumatic line overflow cut-off valves each comprise two separate closed chambers, one of the closed chambers is used for the circulation of brake gas, and the other closed chamber is connected to the conduit on the inlet of the respective pneumatic line overflow cut-off valve through a conduit.

7. The pneumatic brake device for automobile according to claim 1, wherein each of the third and fourth pneumatic line overflow cut-off valves comprises two independent closed chambers, one of the closed chambers is used for the circulation of brake gas, and the other closed chamber is communicated with the conduit on the gas outlet of the respective pneumatic line overflow cut-off valve through a conduit.