Brake pedal linkage control system of underground coal mine trackless auxiliary transportation equipment

Abstract

The invention discloses a brake pedal linkage control system of underground coal mine trackless auxiliary transportation equipment, which relates to the technical field of brake systems and comprises a mechanical brake valve and a flexible brake valve. The mechanical brake valve comprises a pedal plate, a supporting shaft, a pressing tongue and a pedal base, the pedal plate rotates with the supporting shaft as the center to drive the pressing tongue to press a brake valve body downwards, the brake valve body is communicated in a proportional reversing mode, the flexible brake valve is arranged on one side of the mechanical brake valve, a fixing pin shaft penetrates through the flexible brake valve, and the fixing pin shaft is connected with the pedal base. A mechanical and hydraulic combined braking mode is adopted, the service life of a brake of the whole vehicle is prolonged, driving of the whole vehicle is safer, the driving comfort degree is better, and the whole vehicle is changed from flexible braking to zero-speed braking.

Description

Technical Field

[0001] The invention relates to the technical field of brake systems, and in particular to a brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines. Background Art

[0002] With the modernization of underground coal mines and the requirements for building intrinsically safe coal mines and green mining coal mines, under the guidance of the principle of mechanization to reduce manpower, automation to improve quality, and intelligence to increase efficiency, various types of trackless auxiliary transportation equipment have emerged in underground coal mines.

[0003] Trackless auxiliary transportation equipment for underground coal mines has the characteristics of high efficiency, versatility, flexibility and advanced technology. It has been widely used and developed rapidly in some foreign countries with advanced coal mining technology, such as the United States, Australia, the United Kingdom, South Africa, etc. In the mid-to-late 1990s, in order to change the situation that the auxiliary transportation mode of coal mines lags behind the development of mining technology, large mining areas such as Shendong, Yanzhou and Jincheng successively introduced complete sets of trackless rubber-wheeled transportation equipment, which have been successfully applied in flat shafts, vertical shafts and inclined shafts. After using this new auxiliary transportation mode, the auxiliary transportation and the productivity of all mine personnel have been significantly improved.

[0004] The braking system refers to the assembly of all parts that mechanically brake or keep the vehicle stationary, and is an important guarantee for the safe operation of underground rubber-tyred trackless vehicles.

[0005] The coal industry standard MT / T 1199-2023 "General Safety Technical Conditions for Explosion-proof Diesel Engine Trackless Rubber-Tyred Transport Vehicles for Coal Mines" states that trackless transport vehicles should be equipped with working brakes, emergency brakes and parking brakes. The working brake, emergency brake and parking brake must be independent control systems. When the parking brake has an emergency brake function, it can share the brake with the emergency brake, but it should be independent of the working brake. For trackless transport vehicles with hydraulic transmission, the hydraulic travel system can be used as a working brake. Failure of other devices on trackless transport vehicles must not affect the normal operation of the brake system.

[0006] Due to the complex and harsh conditions of underground coal mines, when the trackless auxiliary transportation equipment in coal mines is running in mines with large slopes and long distances, the vehicles brake frequently. In particular, since the non-heavy-load drive axles do not have a forced cooling function, the drive axle brakes are prone to overload, overheating, and excessive wear. When the friction plates in the drive axle brakes are excessively worn, the parking brakes often fail, and the vehicle slips when parked on a slope. Once the brakes of underground coal mine engineering vehicles fail, it often causes serious casualties and property losses.

[0007] In order to solve the above problems, if the underground trackless auxiliary transportation equipment in coal mines adopts a hydrostatic transmission type, the braking of the equipment can be completed by a combined mechanical and hydraulic braking method, which not only increases the service life of the brakes of the whole vehicle, but also makes the driving of the whole vehicle safer and more comfortable, and realizes the whole vehicle from flexible braking to zero-speed braking.

[0008] Therefore, providing a hydrostatic transmission brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0009] The purpose of the present invention is to provide a brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines to solve the problems existing in the above-mentioned prior art, namely, to increase the service life of the brakes of the whole vehicle, make the driving of the whole vehicle safer and more comfortable, and realize the whole vehicle from flexible braking to zero-speed braking.

[0010] To achieve the above object, the present invention provides the following solutions:

[0011] The present invention provides a brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines, comprising a mechanical brake valve and a flexible brake valve;

[0012] The mechanical brake valve comprises a foot pedal, a support shaft, a depressing tongue and a pedal base, the end of the foot pedal is hinged to the top of the pedal base through the support shaft, the depressing tongue is arranged at the bottom of the foot pedal, and the pedal base is used to be installed on the top of the brake valve body. The driver's foot pedal drives the depressing tongue to rotate downward with the support shaft as the axis, presses the top of the brake valve body, and makes the brake valve body proportionally switched and connected. When the foot pedal rotates, it drives the support shaft to rotate synchronously;

[0013] The flexible brake valve is arranged on one side of the mechanical brake valve, and a fixing pin shaft passes through the flexible brake valve, and the fixing pin shaft is located at the shaft body inside the flexible brake valve and is connected to the internal valve core of the flexible brake valve, and one end of the fixing pin shaft close to the mechanical brake valve is fixed to the outer shell of the flexible brake valve by a middle retaining spring, and one end of the fixing pin shaft away from the mechanical brake valve extends out of the first fixing hole connected to one end of the first double-hole square rod of the flexible brake valve, and is fixed by the middle retaining spring, and a second fixing hole is arranged at the other end of the first double-hole square rod, and the second fixing hole is fixed to the bottom end of the intermediate connecting rod by a small retaining spring, and the top end of the intermediate connecting rod is connected to the third fixing hole at one end of the second double-hole square rod, and is fixed by a small retaining spring, and a fourth fixing hole is arranged at the other end of the second double-hole square rod and is connected to one end of the support shaft, and the support shaft is fixed by a large retaining spring.

[0014] Preferably, the control port KZKA of the flexible brake valve is connected to the swash plate control port BLXK of the closed variable pump through a hydraulic hose, the oil unloading port KZKT of the flexible brake valve is connected to the YX1 port of the hydraulic oil tank through a hydraulic hose, the BLBA port of the closed variable pump is connected to the BLMA port of the closed variable motor through a hydraulic hose, and the BLBB port of the closed variable pump is connected to the BLMB port of the closed variable motor through a hydraulic hose. At this time, the closed variable pump and the closed variable motor form a closed-loop circulation, the closed variable pump is connected to the power source, the power source drives the closed variable pump, the closed variable motor is connected to the wheel edge, and the closed variable motor drives the wheel edge to move.

[0015] Preferably, a mounting ear 1 is respectively provided on both sides of the end of the foot pedal, and a mounting ear 2 is respectively provided on both sides of the end of the pedal base, and the hinge hole on the mounting ear 1 is coaxial with the hinge hole on the mounting ear 2 and is connected through a support shaft.

[0016] Preferably, the support shaft is connected to the hinge hole on the first mounting ear by interference fit, and the support shaft is connected to the hinge hole on the second mounting ear by transition fit.

[0017] Preferably, a front positioning nut and a rear positioning nut are respectively provided at the front and rear ends of the top of the pedal base, which are used to limit the front and rear downward travel of the tongue depressor.

[0018] Preferably, two L-shaped bent plates are symmetrically arranged at the bottom of the foot pedal, the pressing tongue is arranged between the two L-shaped bent plates, and a connecting hole is respectively arranged at the end and the middle of the pressing tongue. The connecting hole at the tail end is connected to the support shaft, and the connecting hole at the front end connects the two L-shaped bent plates through a short pin, and the two ends of the short pin are fixed by short pin retaining springs.

[0019] Preferably, the top horizontal plate of the L-shaped bent plate is welded to the foot pedal, a strip hole is opened on the vertical plate of the L-shaped bent plate along the length direction, and the end of the short pin is movably connected to the strip hole.

[0020] Preferably, the bottom of the pressing tongue is provided with a front positioning surface, a brake valve body extrusion surface and a rear positioning surface, the front positioning surface is opposite to the front positioning nut, the rear positioning surface is opposite to the rear positioning nut, and the brake valve body extrusion surface is opposite to the brake valve body.

[0021] Preferably, the bottom of the pedal base is connected to a valve body connecting plate via a valve body fixing screw, and the valve body connecting plate is threadedly connected to the brake valve body via a threaded hole.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The brake pedal linkage control system of the trackless auxiliary transportation equipment in underground coal mines of the present invention enables the equipment braking to be completed in the form of mechanical and hydraulic combined braking, which not only increases the service life of the brake of the whole vehicle, but also makes the driving of the whole vehicle safer and more comfortable, and realizes the whole vehicle from flexible braking to zero-speed braking. The present invention cleverly uses the principle of mechanical lever linkage to realize the mechanical and hydraulic combined braking form, and the structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the brake pedal linkage control system of the trackless auxiliary transportation equipment in underground coal mines in the present invention;

[0026] Figure 2 It is a structural schematic diagram of the brake pedal linkage control system of the underground trackless auxiliary transportation equipment of a coal mine in the present invention being assembled on the brake valve body;

[0027] Figure 3 It is a schematic diagram of the connecting rod structure in the present invention;

[0028] Figure 4 It is a side view of the mechanical brake valve in the present invention;

[0029] Figure 5 It is a front view of the mechanical brake valve in the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the L-shaped bent plate in the present invention;

[0031] Figure 7 It is a structural schematic diagram of the tongue depressor in the present invention;

[0032] In the figure: 1. Mechanical brake valve; 1.1. Foot pedal; 1.2. Depressor tongue; 1.3. Pedal base; 1.4. Front positioning nut; 1.5. Rear positioning nut; 1.6. Short pin shaft; 1.7. L-shaped bent plate; 1.8. Valve body fixing screw; 1.9. Valve body connecting plate; 1.10. Short pin retaining spring; 2. Support shaft; 3. Second double-hole square rod; 4. Large retaining spring; 5. Middle connecting rod; 6. Small retaining spring; 7. Flexible brake valve; 8. Fixed pin shaft; 9. Middle retaining spring; 10. First double-hole square; 11. Hydraulic oil tank; 12. Closed variable pump; 13. Closed variable motor; 14. Front positioning surface; 15. Brake valve body extrusion surface; 16. Rear positioning surface. DETAILED DESCRIPTION

[0033] 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.

[0034] The purpose of the present invention is to provide a brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines to solve the problems existing in the prior art.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The brake pedal linkage control system of the trackless auxiliary transportation equipment in the coal mine in this embodiment is as follows: Figure 1-Figure 7 As shown, it includes a mechanical brake valve 1 and a flexible brake valve 7;

[0037] The mechanical brake valve 1 comprises a foot pedal 1.1, a support shaft 2, a depressing tongue 1.2 and a pedal base 1.3. The end of the foot pedal 1.1 is hinged to the top of the pedal base 1.3 through the support shaft 2. The depressing tongue 1.2 is arranged at the bottom of the foot pedal 1.1. The pedal base 1.3 is used to be installed on the top of the brake valve body. The driver's foot pedal 1.1 drives the depressing tongue 1.2 to rotate downward with the support shaft 2 as the axis, pressing the top of the brake valve body so that the brake valve body is proportionally switched and connected. When the foot pedal 1.1 rotates, it drives the support shaft 2 to rotate synchronously.

[0038] The flexible brake valve 7 is arranged on one side of the mechanical brake valve 1, and a fixing pin shaft 8 runs through the flexible brake valve 7. The fixing pin shaft 8 is located in the shaft body inside the flexible brake valve 7 and is connected to the internal valve core of the flexible brake valve 7. The end of the fixing pin shaft 8 close to the mechanical brake valve 1 is fixed to the outer shell of the flexible brake valve 7 by a middle retaining spring 9. The end of the fixing pin shaft 8 away from the mechanical brake valve 1 extends out of the first fixing hole connected to one end of the first double-hole square rod 10 of the flexible brake valve 7, and is fixed to it by the middle retaining spring 9. A second fixing hole is arranged at the other end of the first double-hole square rod 10, and the second fixing hole is fixed to the bottom end of the intermediate connecting rod 5 by a small retaining spring 6. The top end of the intermediate connecting rod 5 is connected to the third fixing hole at one end of the second double-hole square rod 3, and is fixed by the small retaining spring 6. The fourth fixing hole arranged at the other end of the second double-hole square rod 3 is connected to one end of the support shaft 2, and is fixed to the support shaft 2 by a large retaining spring 4.

[0039] The control port KZKA of the flexible brake valve 7 is connected to the swash plate control port BLXK of the closed variable pump 12 through a hydraulic hose, the oil unloading port KZKT of the flexible brake valve 7 is connected to the YX1 port of the hydraulic oil tank 11 through a hydraulic hose, the BLBA port of the closed variable pump 12 is connected to the BLMA port of the closed variable motor 13 through a hydraulic hose, and the BLBB port of the closed variable pump 12 is connected to the BLMB port of the closed variable motor 13 through a hydraulic hose. At this time, the closed variable pump 12 and the closed variable motor 13 form a closed-loop circulation, the closed variable pump 12 is connected to the power source, the power source drives the closed variable pump 12, the closed variable motor 13 is connected to the wheel side, and the closed variable motor 13 drives the wheel side to move.

[0040] In this specific embodiment, a mounting ear 1 is provided on both sides of the end of the pedal 1.1, and a mounting ear 2 is provided on both sides of the end of the pedal base. The hinge hole on the mounting ear 1 is coaxial with the hinge hole on the mounting ear 2 and is connected through the support shaft 2; the support shaft 2 is connected with the hinge hole on the mounting ear 1 by interference fit, and the support shaft 2 is connected with the hinge hole on the mounting ear 2 by transition fit. This ensures that when the driver steps on the pedal 1.1, the support shaft 2 also rotates downward, driving the second double-hole square rod 3 to rotate downward with the fourth fixed hole as the center of the circle. Since the second double-hole square rod 3 and the middle connecting rod 5 are a connecting rod mechanism, when the second double-hole square rod 3 rotates downward, the middle connecting rod 5 is driven to move downward. Since the first double-hole square rod 10 is fixed to the outside of the flexible brake valve 7 by the fixing pin 8, when the middle connecting rod 5 moves downward, the first double-hole square rod 10 is driven to rotate downward with the first fixed hole as the center of the circle.

[0041] In this specific embodiment, the front and rear ends of the top of the pedal base 1.3 are respectively provided with a front positioning nut 1.4 and a rear positioning nut 1.5, which are used to limit the forward and backward downward travel of the tongue pressing 1.2. Two L-shaped bent plates 1.7 are symmetrically provided at the bottom of the foot pedal 1.1, and the tongue pressing 1.2 is provided between the two L-shaped bent plates 1.7. The end and the middle of the tongue pressing 1.2 are respectively provided with a connecting hole. The connecting hole at the tail end is connected to the support shaft 2, and the connecting hole at the front end connects the two L-shaped bent plates 1.7 through a short pin, and the two ends of the short pin are fixed by a short pin retaining spring 1.10. The top horizontal plate of the L-shaped bent plate 1.7 is welded to the foot pedal 1.1, and a strip hole is provided on the vertical plate of the L-shaped bent plate 1.7 along the length direction, and the end of the short pin is movably connected to the strip hole.

[0042] In this specific embodiment, the bottom of the tongue 1.2 is provided with a front positioning surface, a brake valve body extrusion surface and a rear positioning surface, the front positioning surface is opposite to the front positioning nut 1.4, the rear positioning surface is opposite to the rear positioning nut 1.5, and the brake valve body extrusion surface is opposite to the brake valve body. The bottom of the pedal base 1.3 is connected to the valve body connecting plate 1.9 through the valve body fixing screw, and the valve body connecting plate 1.9 is threadedly connected to the brake valve body through the threaded hole.

[0043] The brake pedal linkage control system of the trackless auxiliary transportation equipment in the coal mine of the present invention has the following working principle:

[0044] When the power source is started, the closed variable pump 12 starts to rotate and operate, and the high and low pressure oil flows from the BLBA port of the closed variable pump 12 to the BLMA port of the closed variable motor 13, and then from the BLMB port of the closed variable motor 13 to the BLBB port of the closed variable pump 12; or the high and low pressure oil flows from the BLBB port of the closed variable pump 12 to the BLMB port of the closed variable motor 13, and then from the BLMA port of the closed variable motor 13 to the BLBA port of the closed variable pump 12. The closed variable pump 12 starts to operate, thereby driving the wheel side to move.

[0045] The initial position of the pedal 1.1 is that under the action of the spring force of the brake valve body, the tongue 1.2 is pushed backward and its rear positioning surface is pressed against the rear positioning nut 1.5, which can limit the position. The initial position of the pedal 1.1 is at an angle of 40° to 50° with the pedal base 1.3.

[0046] When the trackless auxiliary transportation equipment in the coal mine needs to slow down, the driver steps on the pedal 1.1. Since the two L-shaped bent plates 1.7 are symmetrically welded in the middle position of the pedal 1.1, and the short pin shaft 1.6 penetrates the middle position of the two L-shaped bent plates 1.7 and the tongue 1.2, and the two ends are clamped and fixed with short pin retaining springs 1.10, the pedal 1.1 and the tongue 1.2 form a whole, and the pedal 1.1 and the pedal base 1.3 are fixed. When the pedal 1.1 is displaced downward by pressure, the pedal 1.1 takes the mounting ears on both sides of the pedal 1.1 as the circle point, and the pedal 1.1 and the tongue 1.2 move downward together. In this way, the long bevel of the tongue 1.2 can press the top of the brake valve body, so that the brake valve body is proportionally reversing and connected. Finally, the front positioning surface of the tongue 1.2 contacts the front positioning nut 1.4, which can limit the downward position. At this time, the initial position of the pedal 1.1 is at an angle of 25° to 15° with the pedal base 1.3.

[0047] The driver steps on the pedal 1.1 to make the brake valve body of the mechanical brake valve 1 proportionally switch to control the wheel side brake of the trackless auxiliary transportation equipment in the coal mine to achieve mechanical braking.

[0048] Since the support shaft 2 is interference fit with the mounting ears on both sides of the pedal 1.1, the left round hole of the tongue 1.2, and the fourth fixing hole of the second double-hole square rod 3, the support shaft 2 is transition fit with the mounting ears on both sides of the pedal base 1.3. This ensures that when the driver steps on the pedal 1.1, the support shaft 2 also rotates downward, driving the second double-hole square rod 3 to rotate downward with the fourth fixing hole as the center. Since the second double-hole square rod 3 and the middle connecting rod 5 are a connecting rod mechanism, when the second hole square rod 3 rotates downward, the middle connecting rod 5 is driven to move downward. Since the first double-hole square rod 10 is fixed in the middle of the flexible brake valve 7, when the middle connecting rod 5 moves downward, it drives the first double-hole square rod 10 to rotate downward with the first fixing hole as the center.

[0049] Since the fixed pin 8 penetrates the middle of the two symmetrical end faces of the flexible brake valve 7, one end of the fixed pin 8 is clamped and fixed by the middle retaining spring 9, and the extended end of the fixed pin 8 penetrates the first fixed hole of the second double-hole square rod 3, and is then clamped and fixed by the middle retaining spring 9. While the first double-hole square rod 10 rotates downward with the first fixed hole as the center, it drives the valve core inside the center of the flexible brake valve 7 to rotate. At this time, the control port KZKA of the flexible brake valve 7 is proportionally connected to the oil discharge port KZKT, and the oil discharge port KZKT is connected to the YX1 port of the hydraulic oil tank 11, and the swash plate control port BLXK of the closed variable pump 12 is returned to the YX1 port of the hydraulic oil tank 11 through the control port KZKA of the flexible brake valve 7 and the oil discharge port KZKT. The slant angle ratio of the closed variable pump 12 is reduced to zero (the ratio is reduced from the current position until it returns to zero), that is, the high-pressure oil flow output by the closed variable pump 12 is reduced or zero, so that the rotation speed of the closed variable pump 12 is reduced or zero, driving the speed of the wheel-side reducer of the underground trackless auxiliary transportation equipment in the coal mine to decrease or become zero, thereby realizing flexible braking.

[0050] In order to make the mechanical brake and flexible brake of the trackless auxiliary transportation equipment in coal mines work effectively, the distribution of mechanical brake and flexible brake action can be adjusted according to the equipment use conditions and braking requirements. There are four types of brakes:

[0051] ①Flexible braking → mechanical braking;

[0052] ②Flexible braking → mechanical braking + flexible braking;

[0053] ③ Mechanical brake → mechanical brake + flexible brake;

[0054] ④ Mechanical braking → flexible braking.

[0055] Based on the above, the angle of the pressing surface of the mechanical brake valve 1, 1.2 and the length and angle of the intermediate connecting rod 5 can be adjusted to comprehensively realize the above four braking types.

[0056] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines, characterized in that: Including mechanical brake valve and flexible brake valve; The mechanical brake valve comprises a foot pedal, a support shaft, a depressing tongue and a pedal base, the end of the foot pedal is hinged to the top of the pedal base through the support shaft, the depressing tongue is arranged at the bottom of the foot pedal, and the pedal base is used to be installed on the top of the brake valve body. The driver's foot pedal drives the depressing tongue to rotate downward with the support shaft as the axis, presses the top of the brake valve body, and makes the brake valve body proportionally switched and connected. When the foot pedal rotates, it drives the support shaft to rotate synchronously; The flexible brake valve is arranged on one side of the mechanical brake valve, and a fixing pin shaft passes through the flexible brake valve, and the fixing pin shaft is located at the shaft body inside the flexible brake valve and is connected to the internal valve core of the flexible brake valve, and one end of the fixing pin shaft close to the mechanical brake valve is fixed to the outer shell of the flexible brake valve by a middle retaining spring, and one end of the fixing pin shaft away from the mechanical brake valve extends out of the first fixing hole connected to one end of the first double-hole square rod of the flexible brake valve, and is fixed by the middle retaining spring, and a second fixing hole is arranged at the other end of the first double-hole square rod, and the second fixing hole is fixed to the bottom end of the intermediate connecting rod by a small retaining spring, and the top end of the intermediate connecting rod is connected to the third fixing hole at one end of the second double-hole square rod, and is fixed by a small retaining spring, and a fourth fixing hole is arranged at the other end of the second double-hole square rod and is connected to one end of the support shaft, and the support shaft is fixed by a large retaining spring.

2. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 1, characterized in that: The control port KZKA of the flexible brake valve is connected to the swash plate control port BLXK of the closed variable pump through a hydraulic hose, the oil unloading port KZKT of the flexible brake valve is connected to the YX1 port of the hydraulic oil tank through a hydraulic hose, the BLBA port of the closed variable pump is connected to the BLMA port of the closed variable motor through a hydraulic hose, and the BLBB port of the closed variable pump is connected to the BLMB port of the closed variable motor through a hydraulic hose. At this time, the closed variable pump and the closed variable motor form a closed-loop circulation, the closed variable pump is connected to a power source, the power source drives the closed variable pump, the closed variable motor is connected to the wheel side, and the closed variable motor drives the wheel side to move.

3. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 1, characterized in that: A first mounting ear is respectively arranged on both sides of the end of the foot pedal, and a second mounting ear is respectively arranged on both sides of the end of the pedal base. The hinge hole on the first mounting ear is coaxial with the hinge hole on the second mounting ear and is connected through a support shaft.

4. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 3 is characterized in that: The support shaft is connected to the hinge hole on the first mounting ear by interference fit, and the support shaft is connected to the hinge hole on the second mounting ear by transition fit.

5. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 1, characterized in that: A front positioning nut and a rear positioning nut are respectively arranged at the front and rear ends of the top of the pedal base, which are used to limit the front and rear downward travel of the tongue depressor.

6. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 5, characterized in that: Two L-shaped bent plates are symmetrically arranged at the bottom of the foot pedal, the pressing tongue is arranged between the two L-shaped bent plates, and a connecting hole is respectively arranged at the end and the middle of the pressing tongue. The connecting hole at the tail end is connected to the support shaft, and the connecting hole at the front end connects the two L-shaped bent plates through a short pin, and the two ends of the short pin are fixed by short pin retaining springs.

7. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 6, characterized in that: The top horizontal plate of the L-shaped bent plate is welded to the foot pedal, and a strip hole is provided on the vertical plate of the L-shaped bent plate along the length direction, and the end of the short pin is movably connected to the strip hole.

8. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 6, characterized in that: The bottom of the pressing tongue is provided with a front positioning surface, a brake valve body extrusion surface and a rear positioning surface, the front positioning surface is opposite to the front positioning nut, the rear positioning surface is opposite to the rear positioning nut, and the brake valve body extrusion surface is opposite to the brake valve body.

9. The brake pedal linkage control system for trackless auxiliary transportation equipment in underground coal mines according to claim 1, characterized in that: The bottom of the pedal base is connected to the valve body connecting plate through the valve body fixing screws, and the valve body connecting plate is threadedly connected to the brake valve body through the threaded holes.

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