Coal mine underground passenger car passenger door and pedal linkage control system

Abstract

The present invention belongs to the technical field of design of linkage mechanism of pedal and passenger door related parts of explosion-proof personnel transport vehicles for mines, and is specifically a linkage control system of passenger door and pedal of underground personnel transport vehicles in coal mines. It includes a pedal mechanism that can be extended and retracted at the bottom of the frame beam, a passenger door arranged in the door frame beam, and a horn button valve arranged on the door beam of the passenger door; the pedal mechanism drives the extension and retraction through the pedal control left cylinder and the pedal control right cylinder, the front end of the pedal mechanism is connected to one end of the chain ring group through a connecting ring plate, and the other end of the chain ring group is connected to the door frame beam; a lock hole is provided at the corresponding position of the passenger door and the door frame beam, and the piston rod of the double-rod door lock cylinder is provided in the lock hole, and a nylon bumper is installed on the piston rod at the other end of the double-rod door lock cylinder, and the nylon bumper is connected to the pedal control valve. The present invention meets the requirements of passenger compartment height of explosion-proof personnel transport vehicles under different working conditions, ensures the convenience and safety performance of passengers getting on and off the vehicle, and makes the vehicle operation safer and more reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of design of linkage mechanism of relevant parts of pedal board and passenger compartment door of explosion-proof personnel transport vehicle for mine, and specifically is a linkage control system of passenger compartment door and pedal board of underground personnel transport vehicle in coal mine. Background Art

[0002] Coal mine underground personnel transport vehicles are widely used in mines. The external height of the passenger compartment must meet the requirements of different mines and the internal net height. The height of the bottom of the passenger compartment from the ground also changes accordingly. In order to facilitate passengers to get on and off the vehicle, a passenger pedal needs to be set, sometimes two steps are required. The conventional pedal device is set within the length of the passenger compartment. This setting not only occupies the space at the bottom of the passenger compartment, but also affects the appearance. The passenger compartment is also made into a special shape to block the pedal device. To solve this problem, an automatically retractable pedal device is invented and installed under the main beam of the vehicle. Its extension and opening and closing of the passenger compartment door are automatically interlocked and can be linked with the vehicle parking brake. When the door is open, the pedal extends for passengers to step on when getting on and off the vehicle, and the vehicle parking brake is applied; when the door is closed, the pedal retracts and the vehicle parking brake is released. At the same time, the pedal adopts a special design, which can achieve two steps, reduce the height of the pedal, and make it easier for passengers to get on the vehicle safely. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a control system for the linkage between a passenger compartment door and a pedal of a coal mine underground personnel transport vehicle.

[0004] The present invention adopts the following technical scheme: a passenger compartment door and pedal linkage control device for a coal mine underground passenger transport vehicle, comprising a pedal mechanism that can be extended and retracted at the bottom of a frame beam, a passenger compartment door arranged in a door frame beam, and a horn button valve arranged on the door beam of the passenger compartment door; the pedal mechanism drives the extension and retraction through a pedal-controlled left cylinder and a pedal-controlled right cylinder, the front end of the pedal mechanism is connected to one end of a chain ring group through a connecting ring plate, and the other end of the chain ring group is connected to the door frame beam; a lock hole is provided at the corresponding position of the passenger compartment door and the door frame beam, a piston rod of a double-rod door lock cylinder is provided in the lock hole, a nylon bumper is installed on the piston rod at the other end of the double-rod door lock cylinder, and the nylon bumper is connected to the pedal control valve.

[0005] Furthermore, the double-rod door lock cylinder is fixed on a mounting frame through a lock nut II, and the mounting frame is fixed to the door frame beam.

[0006] Furthermore, the nylon bumper is fixed on the piston rod of the double-rod door lock cylinder through threads.

[0007] Furthermore, the pedal-controlled left cylinder and the pedal-controlled right cylinder are fixed to the mounting plate through a lock nut I, and the mounting plate is connected to the frame beam as a whole; the exposed ends of the piston rods of the pedal-controlled left cylinder and the pedal-controlled right cylinder are connected to the mounting frame, and the other end of the mounting frame is fixedly connected to the pedal mechanism through three cotter pins.

[0008] Furthermore, the pedal mechanism includes pedal I and pedal II, pedal I and pedal II are connected to the connecting ring plate through a pin shaft, the frame beam is equipped with a guide groove, and pedal I and pedal II are arranged in the guide groove.

[0009] Furthermore, the chain ring assembly includes a large chain ring installed in the door frame beam groove, a middle section is a small chain ring, the large chain ring is connected to the small chain ring, and the end is a steel wire rope, the small chain ring is connected to the steel wire rope.

[0010] The hydraulic control system of the passenger compartment door and pedal linkage control device of the coal mine underground personnel transport vehicle comprises an air storage tank, which is respectively connected to port 1 of the horn button valve, port 1 of the passenger compartment door switch valve and port 1 of the pedal control valve, wherein port 3 of the horn button valve is connected to the air horn; port 3 of the passenger compartment door switch valve is respectively connected to the air inlet of the throttle valve and the double-rod door lock cylinder, the throttle valve is connected to port 1 of the quick air release valve, port 2 of the quick air release valve is connected to port K of the air-controlled parking brake valve, port A of the air-controlled parking brake valve is connected to the air-controlled parking brake, and port P is connected to the accumulator; the pedal control valve controls the double-rod door lock cylinder, and port 3 of the pedal control valve is respectively connected to the air inlet of the pedal-controlled left cylinder and the pedal-controlled right cylinder.

[0011] The specific control process is:

[0012] 1) Compressed air is stored in the air tank. The compressed air in the air tank reaches the horn button valve, the passenger door switch valve and the port 1 of the pedal control valve. At this time, it is in a sealed state. The air inlet of the double-rod door lock cylinder is discharged through the ports 3 and 2 of the passenger door switch valve. It is reset under the action of the reset spring. The door is in an open state. The piston rod at the other end of the double-rod door lock cylinder pushes the pedal control valve to the upper position. The ports 2 and 3 of the pedal control valve are connected. The compressed air in the air tank enters the port 1 of the pedal control left cylinder and the pedal control right cylinder through the ports 2 and 3 of the pedal control valve to push the pedal mechanism out.

[0013] 2) The accumulator stores high-pressure liquid, which is connected to the P port of the pneumatic parking brake valve. At this time, it is in a closed state. The pneumatic parking brake is a safety brake, spring brake, and oil release; port 1 of the quick air release valve is released through the throttle valve, ports 3 and 2 of the passenger door switch valve, and port K of the pneumatic parking brake valve is exhausted through port 3 of the quick air release valve, and the vehicle is in a parked state.

[0014] 3) When the passengers get off the vehicle, they first press the horn button valve to switch to the left position, and ports 1 and 3 of the horn button valve are connected. The compressed air in the air tank flows to the air horn through ports 1 and 3 of the valve, and the air horn sounds. After hearing the horn sound, the driver opens the passenger door switch valve to the right position, and ports 3 and 2 are connected. Port 1 of the double-lever door lock cylinder is discharged through ports 3 and 2 of the passenger door switch valve. At this time, the door is opened, and the pedal control valve is pushed to the upper position at the same time, and ports 2 and 3 are connected. The compressed air in the air tank enters the air intake port 1 of the pedal control left cylinder and the pedal control right cylinder through ports 2 and 3 of the pedal control valve. The pedal mechanism is pushed out along the guide groove 27, and the passengers get on and off the vehicle safely by stepping on the pedal; at the same time, port 1 of the quick air release valve is discharged through the throttle valve, ports 3 and 2 of the passenger door switch valve, and port K of the air-controlled parking brake valve is exhausted through port 3 of the quick air release valve, and the vehicle is in a parking state.

[0015] 4) After the passengers get on the bus and sit down, they first press the horn button valve to switch to the left position. The compressed air in the air tank reaches the air horn through ports 1 and 3 of the valve. After the air horn sounds, it notifies the driver that he can close the door. The driver operates the passenger door switch valve to the left position. At this time, ports 1 and 3 of the passenger door switch valve are connected, and the compressed air in the air tank reaches port 1 of the double-rod door lock cylinder through ports 1 and 3 of the valve, pushing the piston rod of the double-rod door lock cylinder to move and close the passenger compartment. At the same time, the pedal control valve is switched to the lower position, and ports 1 and 3 of the pedal control valve are connected. The pedal controls the left The air pressure of the right air cylinder is controlled by the air cylinder and the pedal to be released through ports 3 and 2 of the passenger door switch valve. The pedal control cylinder is reset under the action of the reset spring, and the pedal mechanism retracts along the guide groove 27; at the same time, the compressed gas enters port 1 of the quick air release valve through ports 1 and 3 of the passenger door switch valve and the throttle valve, and enters port K of the air-controlled parking brake valve, so that the valve is switched to the lower position, and ports P and A of the air-controlled parking brake valve are connected. The high-pressure liquid in the accumulator enters the parking brake through the valve, and the compression spring is separated from the friction plate, the brake is released, and the vehicle can be driven.

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

[0017] 1) The opening and closing of the passenger compartment door of the explosion-proof passenger transport vehicle and the extension and retraction of the passenger pedal are controlled by a pneumatic mechanism, realizing automatic interlocking control. When the passenger needs to get off the vehicle, he or she can contact the driver through the horn. After the driver opens the door, the pedal automatically extends out, and after closing the door, it automatically retracts. Only the driver can start the opening and closing of the door, and the pedal moves with the opening and closing, ensuring the safety of the passengers. The door will not be opened automatically without the driver's knowledge, avoiding safety risks.

[0018] 2) The opening and closing of the passenger door is automatically linked to the parking brake of the vehicle, and can realize the sequential action of braking first and then opening the door, and closing the door first and then releasing the brake, which increases the safety and reliability of passengers and vehicle operation.

[0019] 3) The pedals do not occupy space in the passenger compartment, effectively ensuring the vehicle's external dimensions.

[0020] 4) The double-step pedal structure is automatically realized to meet the requirements of pedals of different heights.

[0021] The present invention meets the requirements of the passenger compartment height of explosion-proof people carriers under different working conditions, while ensuring the convenience and safety of passengers getting on and off the vehicle, making the vehicle operation safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the control principle diagram of the present invention;

[0023] Figure 2 This is a diagram of the passenger door being closed and the pedal being retracted;

[0024] Figure 3 This is a diagram of the passenger door being opened and the pedal being extended;

[0025] Figure 4 is the plan view of the pedal mechanism;

[0026] Figure 5 This is the elevation view of the pedal mechanism;

[0027] Figure 6 for Figure 5 Bottom schematic diagram;

[0028] In the figure, 1-gas tank, 2-horn button valve, 3-air horn, 4-passenger door switch valve, 5-double-rod door lock cylinder, 6-pedal control valve, 7-pedal control left cylinder, 8-pedal control right cylinder, 9-nylon bumper, 10-door frame beam, 11-passenger door, 12-chain ring group, 13-pin shaft, 14-pin shaft, 15-frame beam, 16-pedal mechanism, 17-mounting frame, 18-mounting plate, 19-lock nut I, 20-large chain ring, 21- Screw, 22-small chain link, 23-wire rope, 24-guard, 25-mounting frame, 26-lock nut II, 27-guide groove, 28-split pin, 29-pedal I, 30-pedal II, 31-connecting ring plate, 32-bolt, 33-throttle valve, 34-quick air release valve, 35-accumulator, 36-air-controlled parking brake valve, 37-parking brake, 38-valve body, 39-valve core, 40-diaphragm spring, 41-sealing ring, 42-spring retaining ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 2 , 3 As shown, a passenger door and pedal linkage control device for a coal mine underground passenger transport vehicle comprises a pedal mechanism 16 which is arranged at the bottom of a frame beam 15 and can be extended and retracted, a passenger door 11 arranged in a door frame beam 10, and a horn button valve 2 arranged on the door beam of the passenger door 11; the pedal mechanism 16 is driven to extend and retract by controlling the left cylinder 7 and the right cylinder 8 through a pedal, the front end of the pedal mechanism 16 is connected to one end of a chain ring group 12 through a connecting ring plate 31, and the other end of the chain ring group 12 is connected to the door frame beam, so as to provide reliable pulling force to avoid the guide groove 27 from being stressed when people step on it; a lock hole is arranged at the corresponding position of the passenger door 11 and the door frame beam 10, and the piston rod of a double-rod door lock cylinder 5 is arranged in the lock hole, and a nylon bumper 9 is installed on the piston rod at the other end of the double-rod door lock cylinder 5, and the nylon bumper 9 is connected to the pedal control valve 6.

[0031] The horn button valve 2 is installed on the door beam in the passenger compartment by means of screws 21 and protected by a shield 24, with only the operating button exposed, which is aesthetically pleasing on the one hand and prevents personnel from tampering with it at will on the other.

[0032] The double-rod door lock cylinder 5 is fixed on the mounting frame 25 through a lock nut 26, and the mounting frame 25 is fixed to the door frame beam 10; one end of the double-rod door lock cylinder is used as a door lock rod, and a nylon collision block 9 is installed on the other end. The nylon collision block is fixed to the piston rod through threads. The collision block is made of nylon material, which is soft but has small deformation and error. At the same time, it is not easy to damage the valve button when colliding with the pedal control valve 6.

[0033] The left cylinder 7 for pedal control is fixed on the mounting plate 18 through the lock nut 19, and the mounting plate 18 is connected to the frame beam 15 as a whole; the exposed end of the piston rod is connected to the mounting frame 17, and the other end of the mounting frame 17 is fixedly connected to the pedal mechanism 16 through three split pins. Two cylinders and two chain ring groups are arranged at both ends of the mounting frame 17, and the left and right structures are the same. Figure 6 .

[0034] The pedal mechanism 16 adopts a two-section design. The pedals I and II are connected to the connecting ring plate 31 through the pin shaft 32. The two pedals can rotate through the two pin shafts of the connecting ring plate. The frame beam 15 is equipped with a guide groove 27, which can keep the mechanism running in a straight line. When the pedal II is pushed out, the guide groove 27 is folded by gravity to form two steps, which is convenient for people to get on and off; when the pedal mechanism needs to be retracted, the pedal I is retracted along the guide groove 27. During the movement, the pedal II that is vertically downward is pushed into a horizontal state by the guide groove 27 and retracts to the initial position along the guide groove 27.

[0035] The chain ring set 12 is composed of three sections, one section is a large chain ring 20, which is installed in the groove of the door frame beam 10 to ensure that the pedal mechanism does not exceed the vehicle body when it is retracted, ensuring the length of the vehicle, and at the same time, it is beautiful and prevents collision and wear. The middle section is a small chain ring 22, and the end is a steel wire rope 23. The end steel wire rope is installed at the front end of the pedal mechanism to ensure that it runs smoothly with the mechanism into the guide groove when the pedal mechanism is retracted.

[0036] like Figure 1 As shown, a hydraulic control system of a passenger compartment door and pedal linkage control device of a coal mine underground personnel transport vehicle comprises an air storage tank 1, which is respectively connected to port 1 of a horn button valve 2, port 1 of a passenger compartment door switch valve 4 and port 1 of a pedal control valve 6, wherein port 3 of the horn button valve 2 is connected to the air horn 3; port 3 of the passenger compartment door switch valve 4 is respectively connected to the air inlet of a throttle valve 33 and a double-rod door lock cylinder 5, the throttle valve 33 is connected to port 1 of a quick air release valve 34, port 2 of the quick air release valve 34 is connected to port K of an air-controlled parking brake valve 26, port A of the air-controlled parking brake valve 26 is connected to an air-controlled parking brake 37, and port P is connected to an accumulator 35; the pedal control valve 6 controls the double-rod door lock cylinder 5, and port 3 of the pedal control valve 6 is respectively connected to the air inlet of a pedal-controlled left cylinder 7 and a pedal-controlled right cylinder 8.

[0037] The specific control process is:

[0038] 1) Compressed air is stored in the air tank 1. The compressed air in the air tank reaches the horn button valve 2, the passenger door switch valve 4 and the port 1 of the pedal control valve 6. At this time, it is in a sealed state. The air inlet of the double-rod door lock cylinder 5 is discharged through the ports 3 and 2 of the passenger door switch valve 4. It is reset under the action of the reset spring. The door is in an open state. The piston rod at the other end of the double-rod door lock cylinder 5 pushes the pedal control valve 6 to the upper position. The ports 2 and 3 of the pedal control valve 6 are connected. The compressed air in the air tank enters the ports 2 and 3 of the pedal control valve 6 into the left pedal control cylinder 7 and the right pedal control cylinder 8, and pushes the pedal mechanism out.

[0039] 2) The accumulator 35 stores high-pressure liquid, which is connected to the P port of the pneumatic parking brake valve 36, which is in a closed state. The pneumatic parking brake 37 is a safety brake, spring brake, and oil release; port 1 of the quick air release valve 34 is released through the throttle valve 9, ports 3 and 2 of the passenger door switch valve 4, and port K of the pneumatic parking brake valve 36 is exhausted through port 3 of the quick air release valve 34, and the vehicle is in a parked state.

[0040] 3) When the passengers get off the bus, they first press the horn button valve 2 to switch to the left position, and the 1st and 3rd ports of the horn button valve 2 are connected. The compressed air in the air tank flows through the 1st and 3rd ports of the valve to the air horn 3, and the air horn sounds. After hearing the horn sound, the driver opens the passenger door switch valve 4 to the right position, and the 3rd and 2nd ports are connected. The 1st port of the double-lever door lock cylinder 5 is deflated through the 3rd and 2nd ports of the passenger door switch valve 4. At this time, the door is opened, and the pedal control valve 6 is pushed to the upper position at the same time, and the 2nd and 3rd ports are connected. The compressed air in the air tank flows through the 2nd and 3rd ports of the pedal control valve 6 to the air inlet 1st port of the pedal control left cylinder 7 and the pedal control right cylinder 8, and the pedal mechanism is pushed out. The passengers get on and off the bus safely by stepping on the pedal; at the same time, the 1st port of the quick air release valve 10 is deflated through the throttle valve 9 and the 3rd and 2nd ports of the passenger door switch valve 4, and the K of the air-controlled parking brake valve 36 is released. The air is exhausted through the 3rd port of the quick air release valve 34, and the vehicle is in a parking state.

[0041] 4) After the passengers get on the bus and sit down, they first press the horn button valve 2 to switch to the left position, and the compressed air in the air tank reaches the air horn 3 through ports 1 and 3 of the valve. After the air horn sounds, the driver is notified that he can close the door. The driver operates the passenger compartment door switch valve 4 to the left position. At this time, ports 1 and 3 of the passenger compartment door switch valve 4 are connected, and the compressed air in the air tank reaches port 1 of the double-rod door lock cylinder 5 through ports 1 and 3 of the valve, pushing the piston rod of the double-rod door lock cylinder 5 to move and close the passenger compartment. At the same time, the pedal control valve 6 is switched to the lower position, and ports 1 and 3 of the pedal control valve 6 are connected. The air pressure controlling the left cylinder 7 and the pedal controlling the right cylinder 8 is released through ports 3 and 2 of the passenger door switch valve 4, and is reset under the action of the reset spring to retract the pedal mechanism; at the same time, the compressed gas enters port 1 of the quick air release valve 34 through ports 1 and 3 of the passenger door switch valve 4 and the throttle valve 33, and enters port K of the air-controlled parking brake valve 36, so that the valve is switched to the lower position, and ports P and A of the air-controlled parking brake valve 36 are connected, and the high-pressure liquid in the accumulator enters the parking brake 37 through the valve, the compression spring is separated from the friction plate, the brake is released, and the vehicle can be driven.

[0042] When the passenger door is closed, Figure 2 , 3The double-rod door lock 5 extends into the lock hole of the passenger door 11 under the action of compressed air. At the same time, the nylon collision block 9 is separated from the pedal control valve 6. The pedal controls the air release of the left and right cylinder air inlets. It is reset under the action of the compression spring, and the pedal mechanism 16 is retracted. A part of the chain ring group 12 is retracted into the guide groove, and both sections of the pedal mechanism 16 return to the groove of the frame beam 15.

[0043] When the passenger door is open, Figure 4 , 5 The double-rod door lock cylinder 5 is reset under the action of the reset spring, and the piston rod withdraws from the lock hole of the passenger door 11, and the door can be opened. At the same time, the nylon collision block 9 presses the pedal control valve 6, and the pedal controls the left and right. The cylinder air inlet extends under the action of compressed air, pushing the pedal mechanism 16 to extend outward. After extending, the two sections are folded into two pedal steps, and the chain ring group 12 is stretched to provide reliable pulling force when people step on it.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic control system for a passenger compartment door and pedal linkage control device of a coal mine underground personnel transport vehicle, characterized in that: The control device comprises a retractable pedal mechanism (16) arranged at the bottom of a vehicle frame beam (15), a passenger compartment door (11) arranged in a door frame beam (10), and a horn button valve (2) arranged on a door beam of the passenger compartment door (11); The pedal mechanism (16) drives the extension and retraction by pedaling the left cylinder (7) and the right cylinder (8), the front end of the pedal mechanism (16) is connected to one end of the chain ring group (12) through a connecting ring plate (31), and the other end of the chain ring group (12) is connected to the door frame beam; A lock hole is provided at a position corresponding to the passenger door (11) and the door frame beam (10), a piston rod of a double-rod door lock cylinder (5) is provided in the lock hole, a nylon bumper (9) is installed on the other end of the piston rod of the double-rod door lock cylinder (5), and the nylon bumper (9) is connected to the pedal control valve (6); The hydraulic control system comprises an air storage tank (1), wherein the air storage tank (1) is respectively connected to a port 1 of a horn button valve (2), a port 1 of a passenger door switch valve (4) and a port 1 of a pedal control valve (6), wherein the port 3 of the horn button valve (2) is connected to the air horn (3); the port 3 of the passenger door switch valve (4) is respectively connected to the air inlet of a throttle valve (33) and a double-rod door lock cylinder (5); the throttle valve (33) is connected to a port 1 of a quick air release valve (34); the port 2 of the quick air release valve (34) is connected to a port K of an air-controlled parking brake valve (26); the port A of the air-controlled parking brake valve (26) is connected to an air-controlled parking brake (37); and the port P is connected to an accumulator (35); the pedal control valve (6) controls the double-rod door lock cylinder (5); the port 3 of the pedal control valve (6) is respectively connected to the air inlet of a pedal-controlled left cylinder (7) and a pedal-controlled right cylinder (8).

2. The hydraulic control system of the passenger compartment door and pedal linkage control device of the coal mine underground personnel transport vehicle according to claim 1 is characterized in that: The double-rod door lock cylinder (5) is fixed on the mounting frame (25) via a lock nut II (26), and the mounting frame (25) is fixed to the door frame beam (10).

3. The hydraulic control system of the passenger compartment door and pedal linkage control device of the coal mine underground personnel transport vehicle according to claim 1, characterized in that: The nylon collision block (9) is fixed on the piston rod of the double-rod door lock cylinder (5) via threads.

4. The hydraulic control system of the passenger compartment door and pedal linkage control device of the coal mine underground personnel transport vehicle according to claim 1, characterized in that: The pedal-controlled left cylinder (7) and the pedal-controlled right cylinder (8) are fixed to a mounting plate (18) via a lock nut I (19), and the mounting plate (18) is connected to the frame beam (15) as a whole; the exposed ends of the piston rods of the pedal-controlled left cylinder (7) and the pedal-controlled right cylinder (8) are connected to a mounting frame (17), and the other end of the mounting frame (17) is fixedly connected to the pedal mechanism (16) via three cotter pins (28).

5. The hydraulic control system of the passenger compartment door and pedal linkage control device of the coal mine underground personnel transport vehicle according to claim 1, characterized in that: The pedal mechanism (16) comprises a pedal I (29) and a pedal II (30), wherein the pedal I (29) and the pedal II (30) are connected to a connecting ring plate (31) via a pin shaft (32), and the frame beam (15) is provided with a guide groove (27), and the pedal I (29) and the pedal II (30) are arranged in the guide groove (27).

6. The hydraulic control system of the passenger compartment door and pedal linkage control device of the coal mine underground personnel transport vehicle according to claim 1, characterized in that: The chain ring set (12) comprises a large chain ring (20) installed in a groove of a door frame beam (10), a middle section is a small chain ring (22), the large chain ring (20) is connected to the small chain ring (22), and the end is a steel wire rope (23), the small chain ring (22) is connected to the steel wire rope (23).

7. The hydraulic control system of the passenger compartment door and pedal linkage control device of the coal mine underground personnel transport vehicle according to claim 1, characterized in that: The specific control process is: 1) Compressed air is stored in the air storage tank (1). The compressed air in the air storage tank reaches the horn button valve (2), the passenger door switch valve (4) and the port 1 of the pedal control valve (6). At this time, the air inlet of the double-rod door lock cylinder (5) is discharged through the ports 3 and 2 of the passenger door switch valve (4). Under the action of the return spring, the door is reset. The door is in the open state. The piston rod at the other end of the double-rod door lock cylinder (5) pushes the pedal control valve (6) to the upper position. The ports 2 and 3 of the pedal control valve (6) are connected. The compressed air in the air storage tank enters the ports 1 of the pedal control left cylinder (7) and the pedal control right cylinder (8) through the ports 2 and 3 of the pedal control valve (6), pushing the pedal mechanism out. 2) The accumulator (35) stores high-pressure liquid, which is connected to the P port of the pneumatic parking brake valve (36). At this time, the pneumatic parking brake (37) is in a closed state. The pneumatic parking brake (37) is a safety brake, spring brake, and oil release; the 1 port of the quick air release valve (34) is discharged through the throttle valve (33) and the 3 and 2 ports of the passenger door switch valve (4), and the K port of the pneumatic parking brake valve (36) is exhausted through the 3 port of the quick air release valve (34). The vehicle is in a parked state; 3) When the passenger gets off the bus, he first presses the horn button valve (2) to switch to the left position, and the horn button valve (2) is connected to the port 1 and the port 3. The compressed air in the air storage tank flows through the horn button valve (2) to the air horn (3), and the air horn sounds. After hearing the horn sound, the driver opens the passenger door switch valve (4) to the right position, and the port 3 and the port 2 are connected. The double-rod door lock cylinder (5) releases air through the port 3 and the port 2 of the passenger door switch valve (4). At this time, the door is opened, and the pedal is pressed The plate control valve (6) is pushed to the upper position, and ports 2 and 3 are connected. The compressed air in the air storage tank enters the air intake port 1 of the pedal control left cylinder (7) and the pedal control right cylinder (8) through ports 2 and 3 of the pedal control valve (6), pushing out the pedal mechanism, so that passengers can get on and off the vehicle safely by stepping on the pedals; at the same time, port 1 of the quick air release valve (34) is released through ports 3 and 2 of the throttle valve (33) and the passenger door switch valve (4), and port K of the air-controlled parking brake valve (36) is exhausted through port 3 of the quick air release valve (34), so that the vehicle is in a parking state; 4) After the passenger gets on the bus and sits down, he first presses the horn button valve (2) to switch to the left position. The compressed air in the air tank flows through the horn button valve (2) to the air horn (3). After the air horn sounds, the driver is notified that he can close the door. The driver operates the passenger compartment door switch valve (4) to the left position. At this time, the 1st and 3rd ports of the passenger compartment door switch valve (4) are connected. The compressed air in the air tank flows through the 1st and 3rd ports of the passenger compartment door switch valve (4) to the 1st port of the double-rod door lock cylinder (5), pushing the piston rod of the double-rod door lock cylinder (5) to move and close the passenger compartment. At the same time, the pedal control valve (6) is switched to the lower position. The 1st and 3rd ports of the pedal control valve (6) are connected. The pedal controls the left side of the vehicle. The air pressure of the air cylinder (7) and the right air cylinder (8) controlled by the pedal is released through the 3rd and 2nd ports of the passenger door switch valve (4), and is reset under the action of the reset spring, so that the pedal mechanism is retracted; at the same time, the compressed gas enters the 1st port of the quick air release valve (34) through the 1st and 3rd ports of the passenger door switch valve (4) and the throttle valve (33), and enters the K port of the air-controlled parking brake valve (36), so that the air-controlled parking brake valve (36) is switched to the lower position, and the P port and the A port of the air-controlled parking brake valve (36) are connected. The high-pressure liquid in the accumulator enters the parking brake (37) through the air-controlled parking brake valve (36), and the compression spring is separated from the friction plate, the brake is released, and the vehicle can be driven.

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