A multi-mode braking system for a special vehicle

Abstract

The application relates to a multi-mode brake system of a special vehicle, which comprises an emergency relay valve, a first relay valve, a second relay valve, an ABS controller, a foot brake valve, a hand brake valve, a normally open electromagnetic valve, a normally closed electromagnetic valve, an electric control proportional valve, a first shuttle valve, a second shuttle valve, a third shuttle valve, an air compressor and a plurality of brake chambers. The application can realize various modes of braking, two-by-two interlocking, automatic switching according to the walking mode of the vehicle, satisfy the overall brake system, can not only guarantee traction braking, but also does not affect the braking work when the vehicle independently walks; and is reasonably designed, can satisfy the integrated brake system of a vehicle under various walking mode states, is complete in function and improves work efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a multi-mode braking system of a special vehicle. BACKGROUND

[0002] At present, the conventional special cargo transportation mode is as follows: a special vehicle is pulled by a tractor to run on an expressway for a long distance, when reaching the vicinity of a site, the cargo is transferred to another special vehicle, and a driver drives the special vehicle for a short distance to reach the site, and then the cargo is transferred to another special vehicle, and a remote control driving or automatic alignment unmanned special equipment is used for docking. The special cargo needs to be hoisted for multiple times during the transportation, and multiple special vehicles are needed, which consumes a large amount of manpower, material resources, and time, and the transportation cost is also relatively large.

[0003] Therefore, the driving modes of multiple special vehicles are concentrated on one vehicle, which can effectively avoid the above problems, but a multi-mode braking system needs to be matched to meet the braking of the vehicle. SUMMARY

[0004] The present application aims to provide a multi-mode braking system of a special vehicle.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A multi-mode braking system of a special vehicle, comprising an emergency relay valve, a first relay valve, a second relay valve, an ABS controller, a foot brake valve, a hand brake valve, a normally open electromagnetic valve, a normally closed electromagnetic valve, an electric control proportional valve, a first shuttle valve, a second shuttle valve, a third shuttle valve, an air compressor, and a plurality of brake air chambers,

[0007] The control input end of the emergency relay valve is used for being connected with a control gas path of a tractor, the gas source input end of the emergency relay valve is used for being connected with a gas source of the tractor, the control output end of the emergency relay valve is connected with the control end of the first relay valve and the ABS controller through the first shuttle valve and the second shuttle valve respectively, and the gas source output end of the emergency relay valve is connected with the gas source input end of the first relay valve, the second relay valve and the ABS controller through the normally open electromagnetic valve respectively; the gas source output ends of the first relay valve, the second relay valve and the ABS controller are connected with the brake air chambers respectively;

[0008] The input end of the foot brake valve, the input end of the hand brake valve, the input end of the electric control proportional valve and the input end of the normally closed electromagnetic valve are connected with the air compressor, the output end of the foot brake valve is connected with the control end of the first relay valve and the ABS controller through the second shuttle valve, the output end of the hand brake valve and the output end of the normally closed electromagnetic valve are connected with the control end of the second relay valve through the third shuttle valve, and the output end of the electric control proportional valve is connected with the control end of the first relay valve and the ABS controller through the first shuttle valve and the second shuttle valve.

[0009] The air compressor is connected with the gas source input end of the first relay valve, the second relay valve and the ABS controller.

[0010] The system preferably comprises a traction braking mode for traction walking, an independent control braking mode for vehicle independent driving and a remote control braking mode for unmanned driving.

[0011] Further preferably, in the traction braking mode, the special vehicle is connected with a traction vehicle, the electric control proportional valve, the normally open electromagnetic valve and the normally closed electromagnetic valve are powered off, when the traction vehicle is braking, the control gas source opens the first relay valve and the ABS controller through the emergency relay valve, the first shuttle valve and the second shuttle valve, and the execution gas source enters the brake chamber through the emergency relay valve, the first relay valve and the ABS controller.

[0012] Further preferably, in the independent control braking mode, the normally open electromagnetic valve is powered on, the electric control proportional valve and the normally closed electromagnetic valve are powered off, when the special vehicle is braking, the control gas source opens the first relay valve and the ABS controller through the foot brake valve and the second shuttle valve, and the execution gas source enters the brake chamber through the first relay valve and the ABS controller.

[0013] More preferably, when the parking brake is released, the hand brake valve is opened, the control gas source opens the second relay valve through the second shuttle valve, and the execution gas source enters the brake chamber through the second relay valve.

[0014] Further preferably, in the remote control braking mode, the normally open electromagnetic valve and the electric control proportional valve are powered on, when the special vehicle is braking, the control gas source opens the first relay valve and the ABS controller through the electric control proportional valve, the first shuttle valve and the second shuttle valve, and the execution gas source enters the brake chamber through the first relay valve and the ABS controller.

[0015] More preferably, when the parking brake is released, the normally closed electromagnetic valve is powered on, the control gas source opens the second relay valve through the normally closed electromagnetic valve and the third shuttle valve, and the execution gas source enters the brake chamber through the second relay valve.

[0016] Preferably, in the above technical solution, the brake chamber includes a service brake chamber and a parking brake chamber, the air source output terminal of the ABS controller is connected to the service brake chamber, the air source output terminal of the first relay valve is connected to the parking brake chamber, and the air source output terminal of the second relay valve is connected to the service brake chamber and the parking brake chamber.

[0017] Preferably, the system further includes a first air storage tank and a second air storage tank, wherein the first air storage tank is connected between the normally open solenoid valve, the air compressor and the air source input terminal of the first relay valve and the ABS controller;

[0018] The air source output terminal of the emergency relay valve and the air compressor are connected to the air source input terminal of the second relay valve via the ABS controller. The second air storage tank is connected between the ABS controller and the second relay valve.

[0019] Preferably, the system further includes a driving pressure switch and a parking pressure switch. The driving pressure switch is disposed between the ABS controller and the brake chamber, and the parking pressure switch is disposed between the second relay valve and the brake chamber.

[0020] Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

[0021] This invention can achieve multiple braking modes, with interlocking between pairs, and automatic switching according to the vehicle's driving mode. The overall braking system not only ensures traction braking but also does not affect braking when the vehicle is driving independently. Furthermore, the rational design allows for an integrated braking system that meets the needs of a vehicle in various driving modes, offering comprehensive functions and improving work efficiency. Attached Figure Description

[0022] Appendix Figure 1 This is a schematic diagram of the multi-mode braking system in this embodiment.

[0023] Appendix Figure 2 This is a schematic diagram of the state of the multi-mode braking system in traction braking mode according to this embodiment.

[0024] Appendix Figure 3 This is a schematic diagram of the state of the multi-mode braking system in this embodiment when the braking mode is controlled independently.

[0025] Appendix Figure 4 This is a schematic diagram of the state of the multi-mode braking system in this embodiment when the braking mode is controlled remotely.

[0026] In the attached diagrams above:

[0027] 1. Emergency relay valve; 2. First relay valve; 3. Second relay valve; 4. ABS controller; 5. Foot brake valve; 6. Hand brake valve; 7. Normally open solenoid valve; 8. Normally closed solenoid valve; 9. Electronically controlled proportional valve; 10. First shuttle valve; 11. Second shuttle valve; 12. Third shuttle valve; 13. Air compressor; 140. Service brake chamber; 141. Parking brake chamber; 150. First air reservoir; 151. Second air reservoir; 160. Service pressure switch; 161. Parking pressure switch. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] like Figure 1 The multi-mode braking system of a special vehicle shown includes an emergency relay valve 1, a first relay valve 2, a second relay valve 3, an ABS controller 4, a foot brake valve 5, a hand brake valve 6, a normally open solenoid valve 7, a normally closed solenoid valve 8, an electronically controlled proportional valve 9, a first shuttle valve 10, a second shuttle valve 11, a third shuttle valve 12, an air compressor 13, and multiple brake chambers, wherein the brake chambers include a service brake chamber 140 and a parking brake chamber 141.

[0031] Foot brake valve 5 and hand brake valve 6 are located in the driver's cab of the special vehicle, while normally open solenoid valve 7, normally closed solenoid valve 8, and electronically controlled proportional valve 9 are installed inside the vehicle body.

[0032] The connection relationships of each component are described in detail below:

[0033] The control input end (4) of the emergency relay valve 1 is connected with the control gas path of the tractor, the gas source input end (1) of the emergency relay valve 1 is connected with the gas source of the tractor, the control output end (2) of the emergency relay valve 1 is connected with the control end of the first relay valve 2 and the ABS controller 4 through the first shuttle valve 10 and the second shuttle valve 11 respectively, the gas source output end (1-2) of the emergency relay valve 1 is connected with the gas source input end of the first relay valve 2, the second relay valve 3 and the ABS controller 4 through the normally open electromagnetic valve 7 respectively, the gas source output end of the ABS controller 4 is connected with the service brake chamber 140, the gas source output end of the first relay valve 2 is connected with the parking brake chamber 141, and the gas source output end of the second relay valve 3 is connected with the service brake chamber 140 and the parking brake chamber 141.

[0034] The control input end (4) and the control output end (2) of the emergency relay valve 1 adopt the handshaking joint, are installed on the vehicle head, are convenient for being connected with the tractor, the control gas path of the tractor provides the control gas source, and the gas source (air cylinder) of the tractor provides the execution gas source.

[0035] The input end of the foot brake valve 5, the input end of the hand brake valve 5, the input end of the electric control proportional valve 9 and the input end of the normally closed electromagnetic valve 8 are connected with the air compressor 13, the control gas source is provided by the air compressor 13, the output end of the foot brake valve 5 is connected with the control end of the first relay valve 2 and the ABS controller 4 through the second shuttle valve 11 respectively, the output end of the hand brake valve 5 and the output end of the normally closed electromagnetic valve 8 are connected with the control end of the second relay valve 2 through the third shuttle valve 13, and the output end of the electric control proportional valve 9 is connected with the control end of the first relay valve 2 and the ABS controller 4 through the first shuttle valve 11 and the second shuttle valve 12 respectively; the air compressor 13 is connected with the gas source input end of the first relay valve 2, the second relay valve 3 and the ABS controller 4, and the execution gas source is provided by the air compressor 13.

[0036] The system further comprises a first air cylinder 150 and a second air cylinder 151, the first air cylinder 150 is connected between the normally open electromagnetic valve 7 and the air compressor 13 and the gas source input end of the first relay valve 2 and the ABS controller 4 to store air, the gas source output end of the emergency relay valve 1 and the air compressor 13 are connected with the gas source input end of the second relay valve 3 through the ABS controller 4, that is, the execution gas source of the second relay valve 3 all passes through the ABS controller 4, and the second air cylinder 151 is connected between the ABS controller 4 and the second relay valve 3 to store air.

[0037] The system further comprises a service pressure switch 160 and a parking pressure switch 161, the service pressure switch 160 is arranged between the ABS controller 4 and the brake chamber, the parking pressure switch 161 is arranged between the second relay valve 3 and the brake chamber, and the service pressure switch 160 and the parking pressure switch 161 are used for judging whether the brake chamber executes after receiving the execution gas source.

[0038] In this embodiment, the system includes three modes: traction braking mode for traction walking, independent control braking mode for vehicle independent driving, and remote control braking mode for unmanned driving.

[0039] like Figure 2 As shown: In traction braking mode: the special vehicle is connected to the tractor, the control input terminal of the emergency relay valve 1 is connected to the control air circuit of the tractor, the air source input terminal of the emergency relay valve 1 is connected to the air source of the tractor, the electronic proportional valve 9, the normally open solenoid valve 7, and the normally closed solenoid valve 8 are de-energized, that is, the electronic proportional valve 9 and the normally open solenoid valve 7 are disconnected, and the normally closed solenoid valve 8 is turned on.

[0040] When the tractor brakes: The tractor provides control air and execution air. The control air opens the first relay valve 2 and ABS controller 4 through the control output end of the emergency relay valve 1, the first shuttle valve 10, and the second shuttle valve 11. The execution air enters the brake air chamber (11) through the air output end of the emergency relay valve 1, the first relay valve 2, and the ABS controller 4 to push the push rod, thus activating the special vehicle's service brake.

[0041] When the parking brake is released: the air compressor 13 provides control air and execution air. When the handbrake valve 6 is opened, the control air source opens the second relay valve 3 through the second shuttle valve 11, and the execution air source enters the brake air chamber (12) through the second relay valve 3 to push the push rod back and release the parking brake; conversely, when the handbrake valve 6 returns to its original position, the air source is discharged through the handbrake valve 6 (3), and the brake air chamber push rod returns to its original position by the return spring to park.

[0042] In addition, when the connecting pipeline between the tractor and the special vehicle is disconnected momentarily, a pressure difference is established between the air source input end and the air source output end of the emergency relay valve 1. The air source will control the first relay valve 2 and the ABS controller 4 to perform emergency driving braking through the emergency relay valve 1.

[0043] like Figure 3 As shown: In independent control braking mode: when the special vehicle is disconnected from the tractor, the normally open solenoid valve 7 is energized, and the electronically controlled proportional valve 9 and the normally closed solenoid valve 8 are de-energized. That is, the electronically controlled proportional valve 9, the normally open solenoid valve 7, and the normally closed solenoid valve 8 are all disconnected, and the air compressor 13 provides an air source of 8 bar (control and execution).

[0044] When the special vehicle is braking: the control air source opens the first relay valve 2 and ABS controller 4 through the foot brake valve 5 and the second shuttle valve 11, and the execution air source enters the brake air chamber (11) through the first relay valve 2 and ABS controller 4 to push the push rod, and the special vehicle is braking.

[0045] When releasing the parking brake: open the handbrake valve 6, control the air source to open the second relay valve 3 through the second shuttle valve 11, and execute the air source to enter the brake air chamber (12) through the second relay valve 3 to push the push rod back and release the parking brake; conversely, the handbrake valve 6 returns to its original position, the air source is discharged through the handbrake valve 6 (3), and the brake air chamber push rod returns to its original position by the return spring to park.

[0046] like Figure 4 As shown, in remote control braking mode: the special vehicle detaches from the tractor, and the air compressor 13 provides an 8 bar air supply (control and execution).

[0047] When the special vehicle is braking: the electronic proportional valve 9 is energized, that is, the electronic proportional valve 9 is open, the control air source opens the first relay valve 2 and ABS controller 4 through the electronic proportional valve 9, the first shuttle valve 10 and the second shuttle valve 11, and the execution air source enters the brake air chamber (11) through the first relay valve 2 and ABS controller 4 to push the push rod, and the special vehicle is braked.

[0048] When the parking brake is released: the normally closed solenoid valve 8 is energized, that is, the normally closed solenoid valve 8 is open, the control air source is opened by the normally closed solenoid valve 8 and the third shuttle valve 12, the second relay valve 2 is opened, the air source enters the brake air chamber (12) through the second relay valve 2 and pushes the push rod back to release the parking brake; the normally closed solenoid valve 8 is de-energized, that is, the normally closed solenoid valve 8 is disconnected, the air source is discharged by the normally closed solenoid valve 8 (3), and the brake air chamber push rod returns to the parking position by the return spring.

[0049] In addition, when a special vehicle encounters an emergency, the emergency button can be operated to de-energize the electronic proportional valve 9, normally open solenoid valve 7, and normally closed solenoid valve 8. That is, the electronic proportional valve 9 and normally open solenoid valve 7 are disconnected, and the normally closed solenoid valve 8 is turned on. The air source in the control pipeline is discharged through the normally closed solenoid valve 8 (3), and the brake air chamber push rod returns to its original position by the reset spring, thus enabling emergency parking.

[0050] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multi-mode braking system for a specialty vehicle, the system comprising: The system comprises an emergency relay valve, a first relay valve, a second relay valve, an ABS controller, a foot brake valve, a hand brake valve, a normally open electromagnetic valve, a normally closed electromagnetic valve, an electric control proportional valve, a first shuttle valve, a second shuttle valve, a third shuttle valve, an air compressor and a plurality of brake air chambers, a control input end of the emergency relay valve is connected with a control air path of a tractor, a gas source input end of the emergency relay valve is connected with a gas source of the tractor, a control output end of the emergency relay valve is connected with a control end of the first relay valve and the ABS controller through the first shuttle valve and the second shuttle valve respectively, a gas source output end of the emergency relay valve is connected with a gas source input end of the first relay valve, the second relay valve and the ABS controller through the normally open electromagnetic valve respectively, a gas source output end of the first relay valve, the second relay valve and the ABS controller is connected with the brake air chamber respectively, an input end of the foot brake valve, an input end of the hand brake valve, an input end of the electric control proportional valve and an input end of the normally closed electromagnetic valve are connected with the air compressor, an output end of the foot brake valve is connected with the control end of the first relay valve and the ABS controller through the second shuttle valve respectively, an output end of the hand brake valve and an output end of the normally closed electromagnetic valve are connected with the control end of the second relay valve through the third shuttle valve, an output end of the electric control proportional valve is connected with the control end of the first relay valve and the ABS controller through the first shuttle valve and the second shuttle valve respectively, the air compressor is connected with the gas source input end of the first relay valve, the second relay valve and the ABS controller, and the system comprises a traction braking mode of traction walking, an independent control braking mode of vehicle independent driving and a remote control braking mode of unmanned driving.

2. The multi-mode braking system for a specialty vehicle of claim 1, wherein: In the traction braking mode, the electric control proportional valve, the normally open electromagnetic valve and the normally closed electromagnetic valve are powered off, when the tractor is driving, the control gas source opens the first relay valve and the ABS controller through the emergency relay valve, the first shuttle valve and the second shuttle valve, and the execution gas source enters the brake air chamber through the emergency relay valve, the first relay valve and the ABS controller.

3. The multi-mode braking system for a specialty vehicle of claim 1, wherein: In the independent control braking mode, the normally open electromagnetic valve is powered on, the electric control proportional valve and the normally closed electromagnetic valve are powered off, when the special vehicle is driving, the control gas source opens the first relay valve and the ABS controller through the foot brake valve and the second shuttle valve, and the execution gas source enters the brake air chamber through the first relay valve and the ABS controller.

4. The multi-mode brake system for a specialty vehicle of claim 2 or 3, wherein: When the parking brake is released, the hand brake valve is opened, the control gas source opens the second relay valve through the second shuttle valve, and the execution gas source enters the brake air chamber through the second relay valve.

5. The multi-mode braking system for special vehicles as claimed in claim 1 wherein: In the remote control braking mode, the normally open electromagnetic valve and the electric control proportional valve are powered on, when the special vehicle is driving, the control gas source opens the first relay valve and the ABS controller through the electric control proportional valve, the first shuttle valve and the second shuttle valve, and the execution gas source enters the brake air chamber through the first relay valve and the ABS controller.

6. The multi-mode braking system for a specialty vehicle of claim 5, wherein: When the parking brake is released: the normally closed electromagnetic valve is powered on, the control air source opens the second relay valve through the normally closed electromagnetic valve and the third shuttle valve, and the air source enters the brake chamber through the second relay valve.

7. The multi-mode braking system for special vehicles as claimed in claim 1 wherein: The brake chamber includes a service brake chamber and a parking brake chamber, the air source output end of the ABS controller is connected to the service brake chamber, the air source output end of the first relay valve is connected to the parking brake chamber, and the air source output end of the second relay valve is connected to the service brake chamber and the parking brake chamber.

8. The multi-mode braking system for special vehicles as claimed in claim 1 wherein: The system further includes a first air cylinder and a second air cylinder, the first air cylinder is connected between the normally open electromagnetic valve, the air compressor and the air source input end of the first relay valve and the ABS controller, the air source output end of the emergency relay valve and the air compressor are connected to the air source input end of the second relay valve through the ABS controller, and the second air cylinder is connected between the ABS controller and the second relay valve.

9. The multi-mode braking system for special vehicles as claimed in claim 1 wherein: The system further includes a service pressure switch and a parking pressure switch, the service pressure switch is arranged between the ABS controller and the brake chamber, and the parking pressure switch is arranged between the second relay valve and the brake chamber.

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