Battery car auxiliary braking device suitable for large-gradient composite TBM tunnel

Abstract

The application discloses a battery car auxiliary braking device suitable for large-gradient composite TBM tunnels, which is installed on a vehicle body, the vehicle body runs on a rail, and comprises a running module, a first gear, a second gear, a retarder module, an oil tank, a hydraulic module and a force applying module. The rail is connected with the running module, the running module is arranged on the vehicle body, the running module is connected with the first gear, the first gear is fixed on the running module, the first gear is in meshing rotation with the second gear, the second gear is connected with the retarder module, the second gear is fixed in the middle of the retarder module, the retarder module is connected with the running module, the retarder module is connected with the hydraulic module, the hydraulic module is fixedly connected to the vehicle body, the hydraulic module is connected with the oil tank, the oil tank is fixedly connected to the vehicle body, the force applying module is fixedly connected with the running module, the force applying module is fixedly connected to the vehicle body, and the hydraulic module and the force applying module are connected with a control module of the vehicle body.

Description

Technical Field

[0001] This invention relates to the field of auxiliary braking device technology, specifically to an auxiliary braking device for battery-powered vehicles suitable for steep gradient composite TBM tunnels. Background Technology

[0002] Shield tunneling battery-powered vehicles are specialized engineering vehicles designed and manufactured for transporting and moving heavy objects within tunnels, thereby improving construction efficiency and promoting energy conservation and environmental protection. Their application has been widely promoted and utilized. The primary function of shield tunneling battery-powered vehicles is to transport large machinery such as bulldozers, loaders, and material hoppers within tunnels. Simultaneously, these vehicles can also be used to transport personnel, materials, and equipment, improving construction efficiency and reducing labor costs. Powered by electric power, shield tunneling battery-powered vehicles offer advantages such as low noise and zero pollution, making them highly efficient, low-carbon, and energy-saving special vehicles.

[0003] Under current technology, electric vehicles are prone to brake failure, slippage, and derailment under steep construction conditions, posing a significant risk of mechanical injury. Summary of the Invention

[0004] The purpose of this invention is to provide an auxiliary braking device for electric vehicles suitable for steep gradient composite TBM tunnels, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] An auxiliary braking system for a battery-powered vehicle suitable for steep gradient TBM tunnels is installed on the vehicle body, which travels on rails. The vehicle is characterized by comprising a travel module, a first gear, a second gear, a retarding module, an oil tank, a hydraulic module, and a force application module. The rails are connected to the travel module, which is mounted on the vehicle body. The travel module is connected to the first gear, which is fixed to the travel module. The first gear meshes with and rotates with the second gear. The second gear is connected to the retarding module and fixed in the middle of the retarding module. The retarding module is connected to the travel module and fixed to the vehicle body. The deceleration module is connected to the hydraulic module, which is fixedly connected to the vehicle body. The hydraulic module is also connected to the oil tank, which is fixedly connected to the vehicle body. The force application module is fixedly connected to the travel module, which is also fixedly connected to the travel module. The hydraulic module and the force application module are connected to the electric vehicle control module. The travel module drives the first gear to rotate. The first gear and the second gear have different numbers of teeth to achieve an acceleration effect. The deceleration module can generate greater resistance to achieve deceleration. The oil tank and the hydraulic module control the flow of oil into and out of the deceleration module. The force application module rubs against the rails to achieve emergency braking.

[0007] Furthermore, the driving module includes a drive wheel, a drive shaft, a first mounting block, a bracket, and a second mounting block. Several drive wheels are provided at both ends of the vehicle body, with four drive wheels facing each other. A drive shaft is fixedly connected between every two drive wheels. Several first mounting blocks are provided on the vehicle body, with two first mounting blocks facing each other. Several brackets are provided on the vehicle body, with two brackets facing each other, and the brackets are located between the first mounting blocks. Several second mounting blocks are provided on the vehicle body, with two second mounting blocks facing each other. The drive wheels are in rolling connection with the rails. The drive shaft is fixedly connected to a first gear. The deceleration module is connected to the first mounting blocks and brackets. The second mounting blocks are fixedly connected to a force-applying module. The vehicle body is used to fix various components. The first mounting blocks and brackets have through holes for fixing the deceleration module, and the second mounting blocks have through holes for fixing the force-applying module.

[0008] Furthermore, the deceleration module includes a rotating shaft, a housing, a turntable, and a blade. The bracket has a through hole, through which the rotating shaft passes and is slidably connected to the bracket. A second gear is fixedly connected in the middle of the rotating shaft, and turntables are respectively provided at both ends of the rotating shaft. The two turntables are placed opposite each other. The end of the turntable away from the second gear is fixedly connected to the blade, and the end of the turntable away from the blade is slidably connected to the housing. The end of the housing away from the second gear is fixedly connected to the first mounting block. The housing is connected to the hydraulic module. The housing prevents oil leakage. The blade is arc-shaped to increase the contact area between the blade and the oil, generating greater resistance. The turntable improves the stability of the connection and increases the bearing capacity of the blade.

[0009] Furthermore, the housing includes a shell, a fixing block, an oil outlet, and an oil inlet. The shell has several fixing blocks at the end away from the second gear, with two fixing blocks placed opposite each other. The shell has an oil outlet and an oil inlet on its side. The fixing blocks are fixedly connected to the first mounting block, and the oil outlet and oil inlet are fixedly connected to the hydraulic module. The fixing blocks have through holes for connecting to the first mounting block, and the oil outlet is located below the oil inlet to prevent oil from flowing directly out of the shell.

[0010] Furthermore, the hydraulic module includes a hydraulic pump, a first solenoid valve, a second solenoid valve, a first oil supply pipe, a second oil supply pipe, a third oil supply pipe, a fourth oil supply pipe, a fifth oil supply pipe, and a gas supply pipe. The hydraulic pump is connected to the second oil supply pipe on its side, and the side of the hydraulic pump away from the second oil supply pipe is connected to the third oil supply pipe. The fifth oil supply pipe is connected to the hydraulic pump in the middle, and one end of the fifth oil supply pipe is connected to the fourth oil supply pipe through the first solenoid valve. The end of the fifth oil supply pipe away from the first solenoid valve is connected to the second solenoid valve, and the end of the second solenoid valve away from the fifth oil supply pipe is connected to the gas supply pipe. The end of the fourth oil supply pipe away from the first solenoid valve is connected to the oil tank, and one end of the first oil supply pipe is connected to the oil tank. The other two ends of the first oil supply pipe are connected to two oil outlets, and the ends of the second and third oil supply pipes away from the hydraulic pump are connected to two oil inlets. The hydraulic pump introduces oil into the oil inlets, the first solenoid valve controls the oil in the oil tank to enter the hydraulic pump, and the second solenoid valve controls the gas to enter the deceleration module through the hydraulic pump to expel the oil from the deceleration module.

[0011] Furthermore, the fuel tank is provided with an outlet, an inlet, and a boss. The bottom of the fuel tank is provided with two bosses placed opposite each other. The fuel tank has an outlet at the end near the boss and an inlet at the end away from the boss. The outlet is fixedly connected to the fourth fuel pipe, and the inlet is fixedly connected to the first fuel pipe. The boss is fixedly connected to the vehicle body. The boss has a through hole for fixing the fuel tank. The outlet at the bottom of the fuel tank facilitates the outflow of fuel, and the inlet at the top of the fuel tank facilitates the inflow of fuel.

[0012] Furthermore, the force application module includes a hydraulic cylinder, a sealing ring, and a brake pad. The telescopic end of the hydraulic cylinder passes through the sealing ring and connects to the brake pad. The hydraulic cylinder is fixedly connected to the vehicle body. The second mounting block has a through hole for fixed connection with the sealing ring. The hydraulic cylinder is equipped with a flange for fixation, and the sealing ring prevents mud and sand from entering the hydraulic cylinder.

[0013] Furthermore, the brake pad includes a connecting block and a friction pad. The friction pad is disposed on the connecting block, and the connecting block is fixedly connected to the hydraulic cylinder. One end of the connecting block is provided with a deep hole to connect to the hydraulic cylinder. The connecting block and the friction pad are provided with inclined surfaces to remove mud and sand from the rails and improve the braking effect.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention reduces the speed of the electric vehicle by slowing down the slowing module, reduces the use of the brake on long slopes, and the force application module can work with the transmission wheel to clamp the rail, improve the braking effect, prevent slippage and derailment, and can still achieve braking when the original brake fails. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the exterior structure of the car body and the railway track;

[0017] Figure 2 This is the main view of the exterior structure of the car body and rails;

[0018] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure at point A;

[0019] Figure 4 This is a schematic diagram of the deceleration module structure of the present invention;

[0020] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure at point B;

[0021] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure at point C

[0022] Figure 7 This is a schematic diagram of the oil tank and hydraulic module structure of the present invention;

[0023] Figure 8 This is a schematic diagram of the force application module structure of the present invention;

[0024] In the diagram: 11. Rail; 12. Vehicle body; 2. Travel module; 21. Drive wheel; 22. Drive shaft; 23. First mounting block; 24. Bracket; 25. Second mounting block; 3. First gear; 4. Second gear; 5. Deceleration module; 51. Shaft; 52. Housing; 521. Shell; 522. Fixing block; 523. Oil outlet; 524. Oil inlet; 53. Turntable; 54. Blade; 6. Oil tank; 61. 62. Liquid outlet; 63. Liquid inlet; 7. Boss; 7. Hydraulic module; 71. Liquid pump; 72. First solenoid valve; 73. Second solenoid valve; 74. First oil supply pipe; 75. Second oil supply pipe; 76. Third oil supply pipe; 77. Fourth oil supply pipe; 78. Fifth oil supply pipe; 79. Air supply pipe; 8. Force application module; 81. Hydraulic cylinder; 82. Sealing ring; 83. Brake pad; 831. Connecting block; 832. Friction pad. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The present invention provides the following technical solution:

[0027] like Figure 1 , 2 As shown in Figure 3, the auxiliary braking device for a battery-powered vehicle suitable for steep gradient composite TBM tunnels is installed on the vehicle body 12, which travels on the rail 11. The auxiliary braking device includes a travel module 2, a first gear 3, a second gear 4, a deceleration module 5, an oil tank 6, a hydraulic module 7, and a force application module 8. The rail 11 is connected to the travel module 2, which is mounted on the vehicle body 12. The travel module 2 is connected to the first gear 3, which is fixed to the travel module 2. The first gear 3 meshes with the second gear 4 and rotates. The second gear 4 is connected to the retarding module 5 and is fixed in the middle of the retarding module 5. The retarding module 5 is connected to the driving module 2 and is fixed on the vehicle body 12. The retarding module 5 is connected to the hydraulic module 7 and is fixedly connected to the vehicle body 12. The hydraulic module 7 is connected to the oil tank 6 and is fixedly connected to the vehicle body 12. The force application module 8 is fixedly connected to the driving module 2 and is fixedly connected to the driving module 2. The hydraulic module 7 and the force application module 8 are connected to the electric vehicle control module.

[0028] The driving module 2 drives the first gear 3 to rotate. The first gear 3 and the second gear 4 have different numbers of teeth to achieve the speed increase effect. The deceleration module 5 can generate greater resistance to achieve deceleration. The oil tank 6 and the hydraulic module 7 control the oil to enter and exit the deceleration module 5. The force application module 8 rubs against the rail 11 to achieve emergency braking.

[0029] like Figure 3 As shown, the driving module 2 includes a drive wheel 21, a drive shaft 22, a first mounting block 23, a bracket 24, and a second mounting block 25. Several drive wheels 21 are provided at both ends of the vehicle body 12, with four drive wheels 21 placed opposite each other. A drive shaft 22 is fixedly connected between every two drive wheels 21. Several first mounting blocks 23 are provided on the vehicle body 12, with two first mounting blocks 23 placed opposite each other. Several brackets 24 are provided on the vehicle body 12, with two brackets 24 placed opposite each other. The brackets 24 are located in the middle of the first mounting blocks 23. Several second mounting blocks 25 are provided on the vehicle body 12, with two second mounting blocks 25 placed opposite each other. The drive wheels 21 are rotatably connected to the rail 11. The drive shaft 22 is fixedly connected to the first gear 3. The deceleration module 5 is connected to the first mounting block 23 and the bracket 24. The second mounting block 25 is fixedly connected to the force application module 8.

[0030] The drive shaft 22 drives the drive wheel 21 to rotate, the first mounting block 23 fixes the deceleration module 5, the bracket 24 supports the deceleration module 5, and the second mounting block 25 fixes the force application module 8.

[0031] like Figure 4 ,5 As shown in Figure 6, the deceleration module 5 includes a rotating shaft 51, a housing 52, a turntable 53, and a blade 54. The bracket 24 has a through hole, and the rotating shaft 51 passes through the through hole of the bracket 24 and is slidably connected to the bracket 24. The second gear 4 is fixedly connected in the middle of the rotating shaft 51. Turntables 53 are respectively provided at both ends of the rotating shaft 51. The two turntables 53 are placed opposite each other. The end of the turntable 53 away from the second gear 4 is fixedly connected to the blade 54. The end of the turntable 53 away from the blade 54 is slidably connected to the housing 52. The end of the housing 52 away from the second gear 4 is fixedly connected to the first mounting block 23. The housing 52 is connected to the hydraulic module 7.

[0032] The housing 52 is fixed on the first mounting block 23. The rotating shaft 51 drives the turntable 53 and the blade 54 to rotate. The turntable 53 increases the bearing capacity of the blade 54. The blade 54 is subjected to resistance when rotating in the oil, and the speed decreases. The second gear 4 is connected to the rotating shaft 51. The second gear 4 reacts with the first gear 3, thereby reducing the speed of the electric vehicle.

[0033] like Figure 6 As shown, the housing 52 includes a housing 521, a fixing block 522, an oil outlet 523, and an oil inlet 524. The housing 521 has several fixing blocks 522 at one end away from the second gear 4, with two fixing blocks 522 placed opposite each other. The housing 521 has an oil outlet 523 and an oil inlet 524 on its side. The fixing blocks 522 are fixedly connected to the first mounting block 23 with bolts. The oil outlet 523 and the oil inlet 524 are fixedly connected to the hydraulic module 7.

[0034] The housing 521 prevents oil leakage, the fixing block 522 is used to connect the first mounting block 23, and the oil outlet 523 and the oil inlet 524 facilitate oil flow.

[0035] like Figure 7 As shown, the hydraulic module 7 includes a hydraulic pump 71, a first solenoid valve 72, a second solenoid valve 73, a first oil supply pipe 74, a second oil supply pipe 75, a third oil supply pipe 76, a fourth oil supply pipe 77, a fifth oil supply pipe 78, and an air supply pipe 79. The hydraulic pump 71 is connected to the second oil supply pipe 75 on one side, and the side of the hydraulic pump 71 away from the second oil supply pipe 75 is connected to the third oil supply pipe 76. The fifth oil supply pipe 78 is connected to the hydraulic pump 71 in the middle, and one end of the fifth oil supply pipe 78 is connected to the fourth oil supply pipe 76 through the first solenoid valve 72. Pipe 77, the fifth oil supply pipe 78 is connected to the second solenoid valve 73 at one end away from the first solenoid valve 72, the second solenoid valve 73 is connected to the gas supply pipe 79 at one end away from the fifth oil supply pipe 78, the fourth oil supply pipe 77 is connected to the oil tank 6 at one end away from the first solenoid valve 72, the first oil supply pipe 74 is connected to the oil tank 6 at one end, and the other two ends of the first oil supply pipe 74 are respectively connected to two oil outlets 523, the second oil supply pipe 75 and the third oil supply pipe 76 are respectively connected to two oil inlets 524 at the ends away from the liquid pump 71.

[0036] The first solenoid valve 72 controls the oil in the oil tank 6 to enter the fifth oil supply pipe 78 through the fourth oil supply pipe 77. The liquid pump 71 pumps the oil through the second oil supply pipe 75 and the third oil supply pipe 76 into two oil inlets 524 respectively. The second solenoid valve 73 controls the gas in the gas supply pipe 79 to enter the housing 521 through the liquid pump 71 and discharge the oil from the housing 521. The oil flowing out of the oil outlet 523 enters the oil tank 6 through the first oil supply pipe 74.

[0037] like Figure 7 As shown, the fuel tank 6 is provided with an outlet 61, an inlet 62 and a boss 63. The bottom of the fuel tank 6 is provided with a boss 63, and the two bosses 63 are placed opposite each other. The fuel tank 6 has an outlet 61 at the end near the boss 63 and an inlet 62 at the end away from the boss 63. The outlet 61 is fixedly connected to the fourth fuel pipe 77, and the inlet 62 is fixedly connected to the first fuel pipe 74. The boss 63 is fixedly connected to the vehicle body 12 with bolts.

[0038] The outlet 61 allows oil to flow into the fourth oil pipe 77. The boss 63 is used to fix the oil tank 6. The oil tank 6 can be connected to the cooling module of the electric vehicle for cooling, or a fan can be installed for cooling. The outlet 61 and the inlet 62 allow oil to flow.

[0039] like Figure 8 As shown, the force application module 8 includes a hydraulic cylinder 81, a sealing ring 82, and a brake pad 83. The telescopic end of the hydraulic cylinder 81 passes through the sealing ring 82 and connects to the brake pad 83. The hydraulic cylinder 81 is fixedly connected to the vehicle body 12. The second mounting block 25 is provided with a through hole and is fixedly connected to the sealing ring 82.

[0040] The electric vehicle control system controls the hydraulic cylinder 81 via a solenoid valve, which in turn controls the brake pads 83 to achieve braking. The sealing ring 82 prevents mud and sand from entering the hydraulic cylinder 81.

[0041] like Figure 8 As shown, the brake pad 83 includes a connecting block 831 and a friction pad 832. The friction pad 832 is disposed on the connecting block 831, and the connecting block 831 is fixedly connected to the hydraulic cylinder 81.

[0042] The connecting block 831 is used to fix the friction plate 832. The friction plate 832 generates resistance by rubbing against the rail 11, which reduces the speed of the electric vehicle.

[0043] The working principle of this invention is as follows: the oil tank supplies oil to the deceleration module through the hydraulic module. The deceleration module generates resistance to reduce the speed of the electric vehicle. The first gear and the second gear increase the resistance generated by the deceleration module. The force application module, in conjunction with the transmission wheel, clamps the rail to prevent derailment and slippage, thus achieving braking.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary braking device for a battery-powered vehicle suitable for a steep gradient composite TBM tunnel, wherein the auxiliary braking device is installed on the vehicle body (12), and the vehicle body (12) travels on the rails (11), characterized in that: The system includes a travel module (2), a first gear (3), a second gear (4), a retarder module (5), an oil tank (6), a hydraulic module (7), and a force application module (8). The rail (11) is connected to the travel module (2), which is mounted on the vehicle body (12). The travel module (2) is connected to the first gear (3), which is fixed to the travel module (2). The first gear (3) meshes with the second gear (4) and rotates. The second gear (4) is connected to the retarder module (5), which is fixed to the retarder module (6). 5) In the middle, the slowing module (5) is connected to the driving module (2), the slowing module (5) is fixed on the vehicle body (12), the slowing module (5) is connected to the hydraulic module (7), the hydraulic module (7) is fixedly connected to the vehicle body (12), the hydraulic module (7) is connected to the oil tank (6), the oil tank (6) is fixedly connected to the vehicle body (12), the force application module (8) is fixedly connected to the driving module (2), the force application module (8) is fixedly connected to the driving module (2), and the hydraulic module (7) and the force application module (8) are connected to the electric vehicle control module; The driving module (2) includes a drive wheel (21), a drive shaft (22), a first mounting block (23), a bracket (24), and a second mounting block (25). The slowing module (5) includes a rotating shaft (51), a housing (52), a turntable (53), and a blade (54). The bracket (24) has a through hole. The rotating shaft (51) passes through the through hole of the bracket (24) and is slidably connected to the bracket (24). The second gear (4) is fixedly connected in the middle of the rotating shaft (51). Turntables (53) are respectively provided at both ends of the rotating shaft (51). The two turntables (53) are placed opposite each other. The end of the turntable (53) away from the second gear (4) is fixedly connected to the blade (54). The end of the turntable (53) away from the blade (54) is slidably connected to the housing (52). The end of the housing (52) away from the second gear (4) is fixedly connected to the first mounting block (23). The housing (52) is connected to the hydraulic module (7). The force application module (8) includes a hydraulic cylinder (81), a sealing ring (82) and a brake pad (83). The extension end of the hydraulic cylinder (81) passes through the sealing ring (82) and connects to the brake pad (83). The hydraulic cylinder (81) is fixedly connected to the vehicle body (12). The second mounting block (25) is provided with a through hole and is fixedly connected to the sealing ring (82).

2. The auxiliary braking device for battery-powered vehicles suitable for steep gradient composite TBM tunnels according to claim 1, characterized in that: The vehicle body (12) has several transmission wheels (21) at both ends. Four of the transmission wheels (21) are placed opposite each other. A transmission shaft (22) is fixedly connected between every two transmission wheels (21). The vehicle body (12) has several first mounting blocks (23). Two of the first mounting blocks (23) are placed opposite each other. The vehicle body (12) has several brackets (24). Two of the brackets (24) are placed opposite each other. The brackets (24) are located in the middle of the first mounting blocks (23). The vehicle body (12) has several second mounting blocks (25). Two of the second mounting blocks (25) are placed opposite each other. The transmission wheels (21) are rolled to the rails (11). The transmission shaft (22) is fixedly connected to the first gear (3). The deceleration module (5) is connected to the first mounting blocks (23) and the brackets (24). The second mounting blocks (25) are fixedly connected to the force application module (8).

3. The auxiliary braking device for battery-powered vehicles suitable for steep gradient composite TBM tunnels according to claim 2, characterized in that: The housing (52) includes a housing (521), a fixing block (522), an oil outlet (523) and an oil inlet (524). The housing (521) has several fixing blocks (522) at one end away from the second gear (4). Two fixing blocks (522) are placed opposite each other. The housing (521) has an oil outlet (523) and an oil inlet (524) on its side. The fixing block (522) is fixedly connected to the first mounting block (23). The oil outlet (523) and the oil inlet (524) are fixedly connected to the hydraulic module (7).

4. The auxiliary braking device for battery-powered vehicles suitable for steep gradient composite TBM tunnels according to claim 3, characterized in that: The hydraulic module (7) includes a hydraulic pump (71), a first solenoid valve (72), a second solenoid valve (73), a first oil supply pipe (74), a second oil supply pipe (75), a third oil supply pipe (76), a fourth oil supply pipe (77), a fifth oil supply pipe (78), and a gas supply pipe (79). The hydraulic pump (71) is connected to the second oil supply pipe (75) on its side. The side of the hydraulic pump (71) away from the second oil supply pipe (75) is connected to the third oil supply pipe (76). The fifth oil supply pipe (78) is connected to the hydraulic pump (71) in the middle. One end of the fifth oil supply pipe (78) is connected to the fourth oil supply pipe through the first solenoid valve (72). Pipe (77), the fifth oil pipe (78) is connected to the second solenoid valve (73) at one end away from the first solenoid valve (72), the second solenoid valve (73) is connected to the gas pipe (79) at one end away from the fifth oil pipe (78), the fourth oil pipe (77) is connected to the oil tank (6) at one end away from the first solenoid valve (72), the first oil pipe (74) is connected to the oil tank (6) at one end, the other two ends of the first oil pipe (74) are connected to two oil outlets (523) respectively, and the second oil pipe (75) and the third oil pipe (76) are connected to two oil inlets (524) at one end away from the liquid pump (71) respectively.

5. The auxiliary braking device for battery-powered vehicles suitable for steep gradient composite TBM tunnels according to claim 4, characterized in that: The oil tank (6) is provided with an outlet (61), an inlet (62) and a boss (63). The bottom of the oil tank (6) is provided with a boss (63) and the two bosses (63) are placed opposite each other. The oil tank (6) is provided with an outlet (61) at the end near the boss (63) and an inlet (62) at the end away from the boss (63). The outlet (61) is fixedly connected to the fourth oil pipe (77) and the inlet (62) is fixedly connected to the first oil pipe (74). The boss (63) is fixedly connected to the vehicle body (12).

6. The auxiliary braking device for battery-powered vehicles suitable for steep gradient composite TBM tunnels according to claim 1, characterized in that: The brake pad (83) includes a connecting block (831) and a friction pad (832). The friction pad (832) is provided on the connecting block (831), and the connecting block (831) is fixedly connected to the hydraulic cylinder (81).

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