Manual pressure relief device for hydraulic braking of unmanned vehicle

Abstract

The invention belongs to the technical field of automobile braking, and discloses an unmanned vehicle hydraulic braking manual pressure relief device which comprises a liquid storage part and a plunger pump, a cavity for storing brake liquid is formed in the liquid storage part, the plunger pump communicates with the cavity, and a first conveying part and a second conveying part are installed at the liquid outlet end of the plunger pump; the pressure relief device further comprises a front connecting piece and a rear connecting piece which are used for being connected with a tire, and a front braking piece and a rear braking piece which are used for clamping or loosening are connected to the connecting piece and the rear connecting piece respectively. Conveying channels for conveying brake fluid along a preset path are formed in the first conveying part and the second conveying part, after a braking system of the unmanned vehicle goes wrong, the chassis braking system of the unmanned vehicle can be quickly relieved, the unmanned vehicle leaves a motor vehicle lane or a sidewalk to an open area, and the safety of the unmanned vehicle is improved. And dangers caused by on-site maintenance of the unmanned vehicle on motor vehicle lanes and sidewalks are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile brakes, and in particular relates to a manual pressure relief device for hydraulic brakes of an unmanned vehicle. Background Art

[0002] With the rapid development of unmanned driving technology, unmanned vehicles have been applied in many fields. However, the existing unmanned vehicle hydraulic brake system often relies on automatic control systems for brake management when encountering emergencies or system failures. It lacks direct manual intervention methods, which limits the flexibility and safety of emergency handling. Traditional solutions include hydraulic brake system solutions, wire-controlled hydraulic brake EHB solutions, and unmanned vehicle hydraulic brake system solutions. Hydraulic brake system solutions such as Figure 1 As shown, the vehicle brake plunger pump is connected to ABS / ESC, and then the ABS / ESC brake fluid circuit is connected to the hydraulic brake caliper or drum brake. When the plunger pump is blocked or the plunger pump spring fails; the ESC / ABS drive motor is damaged, the encoder is damaged, the encoder zero position is lost, the pressure sensor fails, etc., the ABS / ESC / EHB may not work properly, which will cause the brakes to lock, and the vehicle hydraulic brake cannot be depressurized to move; even if all brakes are removed, air will enter the oil pipe. After the vehicle is repaired, the air needs to be re-bled, otherwise it will cause the vehicle to have no braking force or too little braking force, etc., and secondary oil pressure debugging is required to increase the maintenance workload. In addition, if the wheels are locked during operation on the road, the vehicle cannot be moved quickly and can only wait for the tow truck to arrive for towing. The wire-controlled hydraulic brake EHB solution is as follows Figure 2 As shown, the plunger pump is directly connected to the caliper. Problems with the electronic and mechanical structures such as EHB motor failure, encoder failure, pressure sensor failure, plunger pump blockage, plunger pump spring failure, and EHB motor drive transmission structure damage will cause the vehicle tires to lock, making the vehicle unable to move. Even if all brakes are removed, air will enter the oil pipes. After the vehicle is repaired, the air needs to be re-bled, otherwise the vehicle will have no braking force or too little braking force. The need for secondary oil pressure debugging increases the maintenance workload, and if the wheels are locked during operation on the road, the vehicle cannot be moved quickly and can only wait for a tow truck to arrive and tow it away. The unmanned vehicle hydraulic brake system solution is as follows Figure 3As shown, the EHB is directly connected to the brake through an oil pipe. The EHB is a wire-controlled brake device without an external pressurizing device such as a brake pedal. Since most unmanned vehicles are low-speed vehicles, the vehicle stability systems such as ABS and ESC are removed; therefore, when the EHB's plunger pump is stuck, the plunger pump spring fails and cannot be retracted, the drive motor has problems, the EHB's encoder is damaged, the encoder zero position is lost, the pressure sensor cannot detect the pressure, and the vehicle suddenly loses power when the vehicle is braked, the wheel end may be locked, and the unmanned vehicle cannot release pressure to move. The need for secondary oil pressure debugging increases the maintenance workload, and when the wheels are locked during operation on the road, the vehicle cannot be moved quickly and can only wait for the trailer to arrive to tow it away. Therefore, a manual pressure relief device for hydraulic brakes of unmanned vehicles is proposed to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a manual pressure relief device for hydraulic brakes of an unmanned vehicle to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a manual pressure relief device for hydraulic brake of unmanned vehicle, comprising a liquid storage part and a plunger pump, wherein a cavity for storing brake fluid is formed inside the liquid storage part, and the plunger pump is connected to the cavity, and a first conveying part and a second conveying part are installed at the liquid outlet end of the plunger pump;

[0005] The pressure relief device also includes a front connecting member and a rear connecting member for connecting the tire, and the connecting member and the rear connecting member are respectively connected to a front brake member and a rear brake member for clamping or releasing;

[0006] A delivery channel for delivering brake fluid along a preset path is formed inside the first delivery member and the second delivery member, and one end of the first delivery member and the second delivery member are respectively connected to the front brake member and the rear brake member, and a front pressure relief oil pipe is also connected to the plunger pump, and an end of the front pressure relief oil pipe away from the plunger pump is connected to a front pressure relief device valve, a front pressure relief device check valve is also connected to the front pressure relief device valve, and an oil outlet of the front pressure relief device valve is connected to the oil inlet of the front pressure relief device check valve, and a rear pressure relief oil pipe is also installed on the second delivery member, and an end of the rear pressure relief oil pipe away from the second delivery member is connected to a rear pressure relief device valve, a rear pressure relief device check valve is also connected to the rear pressure relief device valve, and an oil outlet of the rear pressure relief device valve is connected to the oil inlet of the rear pressure relief device check valve.

[0007] Preferably, the liquid storage component comprises an EHB oil pot, the top of the EHB oil pot is open to form an oil filling hole for adding brake fluid, a sealing cover is screwed on the oil filling hole, and a cavity is formed inside the EHB oil pot.

[0008] Preferably, the first conveying member includes a front hydraulic brake main oil pipe, one end of the front hydraulic brake main oil pipe is connected to the plunger pump, and the other end is fixedly connected to a front hydraulic pipeline four-way interface, and the front hydraulic pipeline four-way interface is connected to the right front hydraulic brake oil pipe and the left front hydraulic brake oil pipe.

[0009] Preferably, the second conveying member includes a rear hydraulic brake main oil pipe, one end of which is connected to the plunger pump, and the other end is fixedly connected to a rear hydraulic pipeline four-way interface, and the rear hydraulic pipeline four-way interface is connected to a left rear hydraulic brake oil pipe and a right rear hydraulic brake oil pipe.

[0010] Preferably, the front connecting member comprises a left front brake disc and a right front brake disc, and the left front brake disc is located on one side of the right front brake disc.

[0011] Preferably, the rear connecting member comprises a left rear brake disc and a right rear brake disc, and the left rear brake disc is located on one side of the right rear brake disc.

[0012] Preferably, the front brake component includes a left front hydraulic brake caliper and a right front hydraulic brake caliper, the left front hydraulic brake caliper and the right front hydraulic brake caliper are respectively installed on the left front brake disc and the right front brake disc, and the left front hydraulic brake oil pipe is connected to the left front hydraulic brake caliper, and the right front hydraulic brake oil pipe is connected to the right front hydraulic brake caliper.

[0013] Preferably, the rear brake component includes a left rear hydraulic brake caliper and a right rear hydraulic brake caliper, the left rear hydraulic brake caliper and the right rear hydraulic brake caliper are respectively installed on the left rear brake disc and the right rear brake disc, and the left rear hydraulic brake oil pipe is connected to the left rear hydraulic brake caliper, and the right rear hydraulic brake oil pipe is connected to the right rear hydraulic brake caliper.

[0014] Preferably, the pressure relief device also includes an EHB push rod for driving the plunger pump and a driving member for driving the EHB push rod to reciprocate, and the output end of the driving member is connected to the EHB push rod.

[0015] Preferably, the pressure relief device further includes an EHB controller, an EHB pressure sensor is installed on the front hydraulic brake main oil pipe, and the EHB pressure sensor is electrically connected to the EHB controller.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) When a problem occurs in the brake system of an unmanned vehicle, the present invention can quickly release the chassis brake system of the unmanned vehicle, allowing the unmanned vehicle to leave the motor vehicle lane or sidewalk to an open area, thereby avoiding the danger of the unmanned vehicle being repaired on the motor vehicle lane or sidewalk;

[0018] (2) In addition, when a problem occurs with the unmanned vehicle or the braking system, the present invention can quickly release the locked wheels after the after-sales personnel arrive at the scene, so that the vehicle can be pushed away or the emergency control system can be used to move the vehicle, thus avoiding the unnecessary trouble caused by the locked wheels of the unmanned vehicle having to be towed away by a trailer or forklift;

[0019] (3) Since the present invention completely adopts mechanical pressure relief, it will not affect the signal control and signal acquisition of the electronic control unit when the chassis of the unmanned vehicle fails. The electronic control unit of the unmanned vehicle does not need to be powered off, and the failure of the electronic control unit of the unmanned vehicle is retained, which is convenient for later problem troubleshooting;

[0020] (4) The present invention is equipped with a front pressure relief device one-way valve and a rear pressure relief device one-way valve. When pressure relief is required, the brake fluid in the device is relieved into the EHB oil tank through the front pressure relief device one-way valve and the rear pressure relief device one-way valve. When the pressure in the pipeline is consistent with the air pressure, the front pressure relief device one-way valve and the rear pressure relief device one-way valve are closed to prevent air from flowing back into the device. After the problem of the unmanned vehicle is eliminated, there is no need to perform tedious maintenance operations such as removing air from the brake oil pipe, thereby reducing the workload of after-sales personnel. In addition, the brake fluid is recovered into the EHB oil tank after pressure relief, which can avoid the loss of brake fluid, reduce environmental pollution and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is one of the structural schematic diagrams of the prior art;

[0022] Figure 2 This is the second structural diagram of the prior art;

[0023] Figure 3 The third structural diagram of the prior art;

[0024] Figure 4 One of the three-dimensional diagrams of the present invention;

[0025] Figure 5 This is the second stereogram of the present invention;

[0026] In the figure: 1. Left front brake disc; 2. Left front hydraulic brake caliper; 3. Left front hydraulic brake oil pipe; 5. EHB controller; 7. EHB oil pot; 8. Front pressure relief device one-way valve; 9. Front pressure relief device valve; 10. EHB pressure sensor; 11. Front hydraulic pipeline four-way interface; 12. Right front hydraulic brake oil pipe; 13. Front hydraulic brake main oil pipe; 14. Front pressure relief oil pipe; 15. Plunger pump; 16. EHB push rod; 18. Rear pressure relief device valve; 19. Rear pressure relief device one-way valve; 20. Rear hydraulic brake main oil pipe; 21. Rear hydraulic pipeline four-way interface; 22. Left rear hydraulic brake oil pipe; 23. Left rear hydraulic brake caliper; 24. Left rear brake disc; 25. Right rear hydraulic brake oil pipe; 26. Right front hydraulic brake caliper; 27. Right front brake disc; 28. Right rear hydraulic brake caliper; 29. ​​Right rear brake disc; 30. Rear pressure relief oil pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 4-Figure 5 As shown, the present invention provides the following technical solutions:

[0029] A manual pressure relief device for hydraulic brake of an unmanned vehicle comprises a liquid storage part and a plunger pump 15, a cavity for storing brake fluid is formed inside the liquid storage part, and the plunger pump 15 is connected to the cavity, and a first conveying part and a second conveying part are installed at the liquid outlet end of the plunger pump 15;

[0030] It also includes a front connecting piece and a rear connecting piece for connecting the tire, and the connecting piece and the rear connecting piece are respectively connected to a front brake piece and a rear brake piece for clamping or releasing;

[0031] A delivery channel for delivering brake fluid along a preset path is formed inside the first conveying member and the second conveying member, and one end of the first conveying member and the second conveying member are respectively connected to the front brake member and the rear brake member, and the plunger pump 15 is also connected to a front pressure relief oil pipe 14, and the end of the front pressure relief oil pipe 14 away from the plunger pump 15 is connected to a front pressure relief device valve 9, and the front pressure relief device valve 9 is also connected to a front pressure relief device check valve 8, and the oil outlet of the front pressure relief device valve 9 is connected to the oil inlet of the front pressure relief device check valve 8, and a rear pressure relief oil pipe 30 is also installed on the second conveying member, and the end of the rear pressure relief oil pipe 30 away from the second conveying member is connected to a rear pressure relief device valve 18, and the rear pressure relief device valve 18 is also connected to a rear pressure relief device check valve 19, and the oil outlet of the rear pressure relief device valve 18 is connected to the oil inlet of the rear pressure relief device check valve 19.

[0032] Through the above technical solution, when the unmanned vehicle brakes, the plunger pump 15 works, and the plunger pump 15 pressurizes the brake fluid inside the liquid storage member to the inside of the first conveying member and the second conveying member, so as to perform wire-controlled control of the EHB, and the brake fluid is conveyed through the first conveying member, so that the brake fluid is conveyed to the front brake member, so that the front brake member clamps the front connecting member. When the front connecting member needs to be released, the plunger pump 15 works, and the plunger pump 15 draws back the brake fluid through the first conveying member and conveys it back to the liquid storage member, so as to extract the brake fluid in the front brake member, so that the front brake member releases the front connecting member, and the brake fluid is conveyed through the second conveying member, so that the brake fluid is conveyed to the rear brake member, so that the rear brake member clamps the rear connecting member. When the rear connecting member needs to be released, the plunger pump 15 works, and the plunger pump 15 draws back the brake fluid through the second conveying member and conveys it back to the liquid storage member, so as to extract the brake fluid in the rear brake member, so that the rear After the brake part is released, the connecting part, since the front pressure relief device valve 9 is connected to the first conveying part, and the rear pressure relief device valve 18 is connected to the second conveying part, when the pressure in the first conveying part and the second conveying part cannot be released, the front pressure relief device valve 9 and the rear pressure relief device valve 18 are opened, so that the brake fluid in the first conveying part and the second conveying part is discharged through the front pressure relief device valve 9 and the rear pressure relief device valve 18, and then discharged through the front pressure relief device check valve 8 and the rear pressure relief device check valve 19 respectively, thereby releasing the brake and releasing the unmanned vehicle hydraulic brake, so that the unmanned vehicle can move. When the pressure in the first conveying part and the second conveying part is consistent with the air pressure, the front pressure relief device check valve 8 and the rear pressure relief device check valve 19 are closed, so that the air cannot flow back into the first conveying part and the second conveying part. After the unmanned vehicle is repaired, there is no need to perform air exhaust operation and hydraulic braking can be used directly.

[0033] Specifically, in one embodiment, regarding the above-mentioned liquid storage component, Figure 4-Figure 5 As shown:

[0034] The liquid storage part includes an EHB oil pot 7, the top of the EHB oil pot 7 is open to form an oil filling hole for adding brake fluid, a sealing cover is screwed on the oil filling hole, and a cavity is formed inside the EHB oil pot 7.

[0035] In this embodiment, when brake fluid needs to be added, the sealing cover is opened, and brake fluid is added through the oil filling hole to inject the brake fluid into the EHB oil pot 7. After the brake fluid is added, the sealing cover is screwed and connected to the EHB oil pot 7 to complete the addition of brake fluid.

[0036] In addition, in the present invention, regarding the above-mentioned first conveying member, as Figure 4-Figure 5 As shown:

[0037] The first conveying member includes a front hydraulic brake main oil pipe 13, one end of the front hydraulic brake main oil pipe 13 is connected to the plunger pump 15, and the other end is fixedly connected to the front hydraulic pipeline four-way interface 11, the front hydraulic pipeline four-way interface 11 is connected to the right front hydraulic brake oil pipe 12 and the left front hydraulic brake oil pipe 3, and the front hydraulic pipeline four-way interface 11 is also connected to the front pressure relief oil pipe 14.

[0038] In the present embodiment, when it is necessary to deliver brake fluid to the front brake member, the plunger pump 15 is operated, and the plunger pump 15 pressurizes the brake fluid inside the fluid storage member to the front hydraulic brake main oil pipe 13, thereby performing wire-controlled control of the EHB, and delivering brake fluid through the front hydraulic brake main oil pipe 13, allowing the brake fluid to be delivered to the front hydraulic pipeline four-way interface 11, and the brake fluid is delivered to the right front hydraulic brake oil pipe 12 and the left front hydraulic brake oil pipe 3 respectively through the front hydraulic pipeline four-way interface 11, and the brake fluid is delivered to the front brake member through the right front hydraulic brake oil pipe 12 and the left front hydraulic brake oil pipe 3, so that the front brake member clamps the front connecting member, and when the front connecting member needs to be released, the plunger pump 15 is operated, and the plunger pump 15 draws back the brake fluid through the front hydraulic brake main oil pipe 13, and delivers it back to the EHB oil pot 7, thereby extracting the brake fluid in the front brake member, so that the front brake member releases the front connecting member.

[0039] Specifically, in one embodiment, regarding the second conveying member, Figure 4-Figure 5 As shown:

[0040] The second conveying member includes a rear hydraulic brake main oil pipe 20, one end of the rear hydraulic brake main oil pipe 20 is connected to the plunger pump 15, and the other end is fixedly connected to a rear hydraulic pipeline four-way interface 21, and the rear hydraulic pipeline four-way interface 21 is connected to a left rear hydraulic brake oil pipe 22 and a right rear hydraulic brake oil pipe 25, and the rear hydraulic pipeline four-way interface 21 is connected to a rear pressure relief oil pipe 30.

[0041] In this embodiment, when it is necessary to deliver brake fluid to the rear brake member, the plunger pump 15 is operated, and the plunger pump 15 pressurizes the brake fluid inside the fluid storage member to the rear hydraulic brake main oil pipe 20, thereby performing wire-controlled control of the EHB, and delivering brake fluid through the rear hydraulic brake main oil pipe 20, allowing the brake fluid to be delivered to the rear hydraulic pipeline four-way interface 21, and the brake fluid is delivered to the left rear hydraulic brake oil pipe 22 and the right rear hydraulic brake oil pipe 25 respectively through the rear hydraulic pipeline four-way interface 21, and the brake fluid is delivered to the front brake member through the left rear hydraulic brake oil pipe 22 and the right rear hydraulic brake oil pipe 25, so that the rear brake member clamps the rear connecting member, and when the rear connecting member needs to be released, the plunger pump 15 is operated, and the plunger pump 15 draws back the brake fluid through the rear hydraulic brake main oil pipe 20 and delivers it back to the EHB oil pot 7, thereby extracting the brake fluid in the rear brake member, so that the rear brake member releases the front connecting member, and the unmanned vehicle can move.

[0042] In addition, in the present invention, regarding the above-mentioned front connecting member, as Figure 4-Figure 5 As shown:

[0043] The front connecting member includes a left front brake disc 1 and a right front brake disc 27 , and the left front brake disc 1 is located on one side of the right front brake disc 27 .

[0044] In the present embodiment, the left front wheel and the right front wheel are connected via the left front brake disc 1 and the right front brake disc 27, respectively.

[0045] Furthermore, in the present invention, regarding the above-mentioned rear connecting member, as Figure 4-Figure 5 As shown:

[0046] The rear connecting member includes a left rear brake disc 24 and a right rear brake disc 29 , and the left rear brake disc 24 is located on one side of the right rear brake disc 29 .

[0047] In the present embodiment, the left rear wheel and the right rear wheel are connected via the left rear brake disc 24 and the right rear brake disc 29, respectively.

[0048] Specifically, in one embodiment, regarding the front brake member:

[0049] like Figure 4-Figure 5 As shown, the front brake components include a left front hydraulic brake caliper 2 and a right front hydraulic brake caliper 26, which are respectively mounted on a left front brake disc 1 and a right front brake disc 27, and a left front hydraulic brake oil pipe 3 is connected to the left front hydraulic brake caliper 2, and a right front hydraulic brake oil pipe 12 is connected to the right front hydraulic brake caliper 26.

[0050] In this embodiment, when the brake fluid is delivered, the left front brake disc 1 and the right front brake disc 27 are clamped or released by the left front hydraulic brake caliper 2 and the right front hydraulic brake caliper 26 .

[0051] Specifically, in one embodiment, regarding the above-mentioned rear brake member:

[0052] like Figure 4-Figure 5 As shown, the rear brake components include a left rear hydraulic brake caliper 23 and a right rear hydraulic brake caliper 28, which are respectively mounted on a left rear brake disc 24 and a right rear brake disc 29, and a left rear hydraulic brake oil pipe 22 is connected to the left rear hydraulic brake caliper 23, and a right rear hydraulic brake oil pipe 25 is connected to the right rear hydraulic brake caliper 28.

[0053] In the present embodiment, when the brake fluid is delivered, the left rear brake disc 24 and the right rear brake disc 29 are clamped or released by the left rear hydraulic brake caliper 23 and the right rear hydraulic brake caliper 28 .

[0054] Furthermore, regarding how the plunger pump 15 works, the pressure relief device also includes an EHB push rod 16 for driving the plunger pump 15 and a driving member for driving the EHB push rod 16 to move back and forth, and the output end of the driving member is connected to the EHB push rod 16 .

[0055] In this embodiment, the driving member works to drive the EHB push rod 16 to move back and forth, thereby allowing the plunger pump 15 to work.

[0056] In addition, in the present invention, in order to monitor the pressure inside the front hydraulic brake main oil pipe 13 and the rear hydraulic brake main oil pipe 20:

[0057] like Figure 4-Figure 5 As shown, the pressure relief device also includes an EHB controller 5 , and an EHB pressure sensor 10 is installed on the front hydraulic brake main oil pipe 13 , and the EHB pressure sensor 10 is electrically connected to the EHB controller 5 .

[0058] In the present embodiment, the pressures in the front hydraulic brake main pipe 13 and the rear hydraulic brake main pipe 20 are monitored by the EHB pressure sensor 10 .

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manual pressure relief device for hydraulic brakes of unmanned vehicles, characterized in that: It comprises a liquid storage component and a plunger pump (15), wherein a cavity for storing brake fluid is formed inside the liquid storage component, and the plunger pump (15) is connected to the cavity, and a first conveying component and a second conveying component are installed at the liquid outlet end of the plunger pump (15); It also includes a front connecting member and a rear connecting member for connecting the tire, and the connecting member and the rear connecting member are respectively connected to a front brake member and a rear brake member for clamping or releasing; A delivery channel for delivering brake fluid along a preset path is formed inside the first delivery member and inside the second delivery member, and one end of the first delivery member and the second delivery member are respectively connected to the front brake member and the rear brake member, and the plunger pump (15) is also connected to a front pressure relief oil pipe (14), and one end of the front pressure relief oil pipe (14) away from the plunger pump (15) is connected to a front pressure relief device valve (9), and the front pressure relief device valve (9) is also connected to a front pressure relief device check valve (8), and the front The oil outlet of the pressure relief device valve (9) is connected to the oil inlet of the front pressure relief device check valve (8); a rear pressure relief oil pipe (30) is also installed on the second conveying member; an end of the rear pressure relief oil pipe (30) away from the second conveying member is connected to the rear pressure relief device valve (18); the rear pressure relief device check valve (19) is also connected to the rear pressure relief device valve (18); and the oil outlet of the rear pressure relief device valve (18) is connected to the oil inlet of the rear pressure relief device check valve (19).

2. The manual pressure relief device for hydraulic brake of unmanned vehicle according to claim 1, characterized in that: The liquid storage component comprises an EHB oil pot (7), the top of the EHB oil pot (7) is open to form an oil filling hole for adding brake fluid, a sealing cover is screwed on the oil filling hole, and a cavity is formed inside the EHB oil pot (7).

3. The manual pressure relief device for hydraulic brake of unmanned vehicle according to claim 1, characterized in that: The first conveying member comprises a front hydraulic brake main oil pipe (13), one end of the front hydraulic brake main oil pipe (13) is connected to a plunger pump (15), and the other end is fixedly connected to a front hydraulic pipeline four-way interface (11), and the front hydraulic pipeline four-way interface (11) is connected to a right front hydraulic brake oil pipe (12) and a left front hydraulic brake oil pipe (3).

4. A manual pressure relief device for hydraulic brakes of an unmanned vehicle according to any one of claims 1 to 3, characterized in that: The second conveying member comprises a rear hydraulic brake main oil pipe (20), one end of the rear hydraulic brake main oil pipe (20) is connected to the plunger pump (15), and the other end is fixedly connected to a rear hydraulic pipeline four-way interface (21), and the rear hydraulic pipeline four-way interface (21) is connected to a left rear hydraulic brake oil pipe (22) and a right rear hydraulic brake oil pipe (25).

5. The manual pressure relief device for hydraulic brake of unmanned vehicle according to claim 1, characterized in that: The front connecting member comprises a left front brake disc (1) and a right front brake disc (27), wherein the left front brake disc (1) is located on one side of the right front brake disc (27).

6. The manual pressure relief device for hydraulic brakes of unmanned vehicles according to claim 1 is characterized in that: The rear connecting member comprises a left rear brake disc (24) and a right rear brake disc (29), wherein the left rear brake disc (24) is located on one side of the right rear brake disc (29).

7. The manual pressure relief device for hydraulic brakes of an unmanned vehicle according to claim 5, characterized in that: The front brake component comprises a left front hydraulic brake caliper (2) and a right front hydraulic brake caliper (26), wherein the left front hydraulic brake caliper (2) and the right front hydraulic brake caliper (26) are respectively mounted on a left front brake disc (1) and a right front brake disc (27), and a left front hydraulic brake oil pipe (3) is connected to the left front hydraulic brake caliper (2), and the right front hydraulic brake oil pipe (12) is connected to the right front hydraulic brake caliper (26).

8. The manual pressure relief device for hydraulic brakes of unmanned vehicles according to claim 6 is characterized by: The rear brake component comprises a left rear hydraulic brake caliper (23) and a right rear hydraulic brake caliper (28), wherein the left rear hydraulic brake caliper (23) and the right rear hydraulic brake caliper (28) are respectively mounted on a left rear brake disc (24) and a right rear brake disc (29), and a left rear hydraulic brake oil pipe (22) is connected to the left rear hydraulic brake caliper (23), and the right rear hydraulic brake oil pipe (25) is connected to the right rear hydraulic brake caliper (28).

9. The manual pressure relief device for hydraulic brakes of unmanned vehicles according to claim 1, characterized in that: It also includes an EHB push rod (16) for driving the plunger pump (15) and a driving member for driving the EHB push rod (16) to move back and forth, wherein the output end of the driving member is connected to the EHB push rod (16).

10. The manual pressure relief device for hydraulic brake of unmanned vehicle according to claim 3, characterized in that: It also includes an EHB controller (5), and an EHB pressure sensor (10) is installed on the front hydraulic brake main oil pipe (13), and the EHB pressure sensor (10) is electrically connected to the EHB controller (5).

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