Special hydrogen fuel non-road tractor for port

Abstract

The invention relates to a special hydrogen fuel non-road tractor for a port, and relates to the field of port traction devices, the special hydrogen fuel non-road tractor comprises a tractor head unit taking a hydrogen fuel cell system as a power source, and the tail part of the tractor head unit is provided with a traction structure connected with a cargo plate trailer; the traction structure comprises a pin seat, a buffer seat, an elastic buffer unit and a friction buffer unit, the buffer seat is fixedly connected with the vehicle head unit and can be detachably connected with the goods plate trailer through a pin shaft, the pin seat is slidably connected with the buffer seat through the elastic buffer unit, and the friction buffer unit is connected with the buffer seat through the elastic buffer unit. The buffering seat is arranged on the pin seat to form buffering between the pin seat and the buffering seat, and the friction buffering unit is arranged on the buffering seat and can increase the friction force applied to the pin seat along with the increase of the sliding distance between the buffering seat and the pin seat. The vehicle head unit has the advantages that impact between the goods plate trailer and the vehicle head unit is reduced, and therefore the goods transportation safety of the tractor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of port traction devices, and in particular to a hydrogen fuel non-road tractor dedicated to ports. Background Art

[0002] At present, port logistics transportation mainly relies on traditional fuel tractors. However, with the increasing awareness of environmental protection and the development of new energy vehicle technology, traditional fuel tractors are facing challenges due to emission pollution and energy consumption. Therefore, the development of new energy port tractors has become an industry development trend.

[0003] When a tractor tows a cargo cart, it is necessary to use a traction connection device to connect the cargo cart and the tractor. The existing traction connection device includes a pin plate and a pin shaft. The pin plate is welded to the tractor, and the cargo cart is fixed to the pin plate by the pin shaft, thereby completing the connection between the cargo cart and the tractor. However, due to the welding between the pin plate and the tractor, the traction device is subjected to a large impact when the traction speed of the tractor changes, thereby reducing the safety of cargo transportation. Summary of the invention

[0004] In order to improve the problem that when the traction speed of the tractor changes, the traction device is subjected to a large impact, thereby reducing the safety of cargo transportation, the present application provides a hydrogen fuel non-road tractor dedicated to ports.

[0005] The present application provides a special hydrogen fuel non-road tractor for ports, which adopts the following technical solutions: A hydrogen fuel non-road tractor for ports, comprising a front unit using a hydrogen fuel cell system as a power source, wherein the tail of the front unit is provided with a traction structure connected to a cargo flatbed truck; The traction structure includes a pin seat, a buffer seat, an elastic buffer unit and a friction buffer unit. The buffer seat is fixedly connected to the vehicle head unit, and the buffer seat can be detachably connected to the cargo cart through a pin shaft. The pin seat and the buffer seat are slidably connected through the elastic buffer unit to form a buffer between the pin seat and the buffer seat. The friction buffer unit is arranged on the buffer seat and can increase the friction force applied to the pin seat as the sliding distance between the buffer seat and the pin seat increases.

[0006] By adopting the above technical solution, the cargo cart is installed on the pin seat through the pin shaft, and then the front unit is driven to move with hydrogen as the raw material. When the front unit is accelerated or decelerated, relative sliding occurs between the pin seat and the buffer seat, and the elastic buffer unit is elastically deformed to alleviate the impact between the pin seat and the buffer seat. At the same time, when the speed changes greatly, the sliding distance between the pin seat and the buffer seat increases, and the friction force applied to the pin seat by the friction buffer unit increases to reduce the impact between the cargo cart and the front unit, thereby improving the safety of cargo transportation by the tractor.

[0007] In a specific possible implementation scheme, the pin seat includes a connecting shaft, the connecting shaft is inserted into the buffer seat and slidably connected, and a sliding portion is fixedly provided on the connecting shaft; The elastic buffer unit includes two groups of telescopic springs, which are both sleeved on the connecting shaft and arranged on both sides of the sliding part. One end of each group of telescopic springs is connected to the buffer seat, and the other end is connected to the sliding part.

[0008] By adopting the above technical solution, when the speed of the head unit changes, the connecting shaft slides in the pin seat and the telescopic spring is squeezed and contracted by the sliding part to achieve a buffer connection between the pin seat and the buffer seat; by setting two sets of telescopic springs, the pin seat and the buffer seat can achieve buffering in both acceleration and deceleration states.

[0009] In a specific possible implementation scheme, the friction buffer unit includes a friction plate and a driving block. The friction plate is slidably arranged on the buffer seat along a sliding direction perpendicular to the connecting shaft. The driving block is fixedly arranged on the sliding portion. A guide structure is provided on the friction plate. The driving block can drive the friction plate to be pressed against the sliding portion through the guide structure, and make the friction force positively correlated with the sliding distance of the connecting shaft.

[0010] By adopting the above technical solution, when the connecting shaft slides in the buffer seat, the connecting shaft drives the sliding part to slide, and the sliding part drives the driving block to slide. The driving block drives the friction plate to be pressed on the sliding part through the guide structure to apply friction force to the sliding part to achieve buffering between the pin seat and the buffer seat; as the sliding distance of the connecting shaft increases, the friction force applied by the friction plate to the sliding part gradually increases to increase the buffering effect between the pin seat and the buffer seat, and at the same time, it can reduce the extrusion of the telescopic spring by the connecting shaft to ensure that the telescopic spring can work normally.

[0011] In a specific possible implementation manner, the guide structure includes a guide groove provided on the driving block, and the driving block can be inserted into the guide groove and slidably connected to drive the friction plate to be pressed against the sliding portion.

[0012] By adopting the above technical solution, the sliding part drives the driving block to slide in the guide groove, and under the guidance of the guide groove, the driving friction plate is pressed against the sliding part, thereby improving the stability of the driving block driving the friction plate, having a strong bearing capacity, and being able to withstand a large load.

[0013] In a specific possible implementation manner, the guide groove includes a first groove section and a second groove section, and the first groove section and the second groove section are symmetrically arranged so that bidirectional sliding of the connecting shaft can drive the friction plate to press down the sliding portion.

[0014] By adopting the above technical solution, the guide groove is divided into a first groove section and a second groove section, which can ensure that the friction plate can apply friction to the sliding part when the head unit is in the acceleration and deceleration state, thereby improving the buffering effect between the cargo cart and the tractor.

[0015] In a specific possible implementation manner, a roller is rotatably sleeved on the driving block, and the roller can roll in the guide groove.

[0016] By adopting the above technical solution, the sliding connection of the driving block in the guide groove is replaced by the sliding of the roller in the guide groove, thereby reducing the friction between the driving block and the friction plate.

[0017] In a specific possible implementation scheme, the friction plate is provided with a pressing member abutting against the sliding portion; The clamping member includes a pressing plate and a pressing spring. The pressing plate is slidably arranged on the side of the friction plate facing the sliding part. The pressing spring is located between the pressing plate and the sliding part, and its two ends are respectively connected to the pressing plate and the sliding part. A guide rod is fixedly provided on the pressing plate, and the guide rod is slidably inserted on the friction plate.

[0018] By adopting the above technical solution, the friction plate presses the pressure plate onto the sliding part through the compression spring, thereby achieving a temporary friction force on the sliding part. By setting the compression spring, it is possible to avoid excessive friction force, which may cause the friction plate and the sliding part to stick together.

[0019] In a specific possible implementation manner, a wear-resistant coating is provided on the contact surface between the pressing plate and the sliding portion.

[0020] By adopting the above technical solution and setting the wear-resistant coating, the friction consumption between the pressure plate and the sliding part can be reduced, thereby extending the service life of the traction structure.

[0021] In a specific implementation manner, the lengths of the first slot segment and the second slot segment are both greater than the sliding length of the driving block.

[0022] By adopting the above technical solution, as the pressure plate and the sliding part move, the pressure plate and the sliding part are constantly consumed, and the lengths of the first groove section and the second groove section are set to be greater than the sliding length of the driving block, so that the driving block slides a slightly longer distance to drive the pressure plate to press on the sliding part, thereby reducing the influence of friction consumption on the application of friction between the pressure plate and the sliding part.

[0023] In a specific implementation manner, the hydrogen raw material of the hydrogen fuel cell system of the head unit is 10-70 MPa hydrogen.

[0024] By adopting the above technical solution, hydrogen is compressed into high pressure and high density, which increases the storage density of hydrogen and thus extends the cruising range of the tractor.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cargo flatbed is installed on the pin seat through the pin shaft, and then the head unit is driven to move with hydrogen as the raw material. When the head unit is accelerating or decelerating, relative sliding occurs between the pin seat and the buffer seat. The elastic buffer unit is elastically deformed to alleviate the impact between the pin seat and the buffer seat. At the same time, when the speed changes greatly, the sliding distance between the pin seat and the buffer seat increases, and the friction force applied to the pin seat by the friction buffer unit increases to reduce the impact between the cargo flatbed and the head unit, thereby improving the safety of cargo transportation by the tractor; 2. The use of hydrogen fuel cell system as a power source achieves the goal of zero emissions and low-carbon environmental protection. Hydrogen is compressed into high pressure and high density, which increases the storage density of hydrogen and thus extends the cruising range of the tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a hydrogen fuel non-road tractor for port use according to an embodiment of the present application.

[0027] Figure 2 It is a structural diagram used to show the traction structure.

[0028] Figure 3 is along Figure 2 Section view along line AA.

[0029] Figure 4 is along Figure 2 Sectional view along line BB.

[0030] Figure 5 It is an exploded view used to show the coordination between the guide groove and the roller.

[0031] Figure 6 It is a schematic diagram for showing the structure of the guide groove.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. front unit; 2. traction structure; 21. pin seat; 211. connecting shaft; 212. seat body; 213. sliding part; 22. buffer seat; 221. buffer groove; 222. blocking part; 223. strip hole; 23. elastic buffer unit; 231. telescopic spring; 232. support plate; 24. friction buffer unit; 241. friction plate; 242. driving block; 243. sliding groove; 244. sliding part; 245. clamping member; 2451. pressure plate; 2452. clamping spring; 2453. guide rod; 246. guide structure; 2461. guide groove; 2462. roller; 2463. first groove section; 2464. second groove section; 3. wear-resistant coating. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The embodiment of the present application discloses a hydrogen fuel non-road tractor for use in ports.

[0035] Reference Figure 1 A hydrogen fuel non-road tractor for ports includes a front unit 1 using a hydrogen fuel cell system as a power source, and a traction structure 2 connected to a cargo truck is provided at the rear of the front unit.

[0036] The head unit 1 includes a fuel cell stack, a hydrogen system, an air system, a cooling system, an onboard hydrogen storage system, a battery system, and other auxiliary components. The fuel cell stack is the core component of a hydrogen fuel cell vehicle, which converts chemical energy into electrical energy through a chemical reaction between hydrogen and oxygen. This process is carried out on a proton exchange membrane, where hydrogen ions pass through the membrane to the cathode and react with electrons and oxygen from an external circuit to generate water, thereby generating electrical energy.

[0037] The hydrogen system includes a hydrogen storage tank, a pressure regulating valve, a hydrogen injector, a hydrogen circulation pump, a water-gas separator, etc., which is responsible for providing the hydrogen required by the fuel cell stack and ensuring the purity and pressure of the hydrogen. The air system includes an air filter, an air flow meter, an air compressor, an intercooler, a three-way valve, an air back pressure valve, a muffler, etc., which provides the oxygen required by the fuel cell stack and ensures the purity and pressure of the oxygen. The cooling system consists of a water pump, a thermostat, a deionizer, a radiator, etc., which is responsible for managing the heat generated by the entire system and keeping the system temperature in the high-efficiency range.

[0038] The on-board hydrogen storage system is used to store 10-70Mpa high-pressure hydrogen, usually including pressure vessels, valves, sensors and other components to ensure the safety and stability of hydrogen. The use of hydrogen fuel cell system as a power source achieves the goal of zero emissions and low-carbon environmental protection. Hydrogen is compressed into high pressure and high density, which increases the storage density of hydrogen, thereby extending the cruising range of the tractor. The battery system includes batteries, chargers, DC-AC inverters, etc., which are used to store and release electrical energy to provide auxiliary energy for fuel cell vehicles.

[0039] In addition, hydrogen fuel cell vehicles also include other auxiliary components, such as safety devices, driving systems, etc., to ensure the safe operation and driving comfort of the vehicle. These components work together to enable hydrogen fuel cell vehicles to efficiently convert hydrogen into electrical energy to drive the vehicle.

[0040] Reference Figure 1 , Figure 2 The traction structure 2 includes a pin seat 21, a buffer seat 22, an elastic buffer unit 23 and a friction buffer unit 24. The pin seat 21 includes a connecting shaft 211 and a seat body 212. The cross-section of the connecting shaft 211 is rectangular. The pin seat 21 can be detachably connected to the cargo cart by cooperating with the pin shaft. The buffer seat 22 is fixedly connected to the front unit 1.

[0041] Reference Figure 2 , Figure 3 The buffer seat 22 is provided with a buffer groove 221 for the connecting shaft 211 to be inserted, and the cross-sectional area of ​​the buffer groove 221 is larger than the cross-sectional area of ​​the connecting shaft 211. The connecting shaft 211 and the buffer seat 22 are slidably connected through the elastic buffer unit 23 to form a buffer between the pin seat 21 and the buffer seat 22. The friction buffer unit 24 is provided on the buffer seat 22, and can increase the friction force applied to the pin seat 21 as the sliding distance between the buffer seat 22 and the pin seat 21 increases.

[0042] The cargo cart is installed on the pin seat 21 through a pin shaft, and then the front unit 1 is driven to move with hydrogen as raw material. When the front unit 1 is accelerating or decelerating, relative sliding occurs between the pin seat 21 and the buffer seat 22, and the elastic buffer unit 23 is elastically deformed to alleviate the impact between the pin seat 21 and the buffer seat 22. At the same time, when the speed changes greatly, the sliding distance between the pin seat 21 and the buffer seat 22 increases, and the friction force applied to the pin seat 21 by the friction buffer unit 24 increases to reduce the impact between the cargo cart and the front unit 1, thereby improving the safety of cargo transportation by the tractor.

[0043] Reference Figure 2 , Figure 3A sliding portion 213 is fixedly provided on the portion of the connecting shaft 211 inserted into the buffer groove 221. The sliding portion 213 is concave-convexly matched with the buffer groove 221 and is slidably connected. The end of the buffer seat 22 is retracted inward to form a blocking portion 222 that blocks the sliding portion 213 from sliding out of the buffer groove 221. Strip holes 223 are provided on the opposite side walls of the buffer seat 22. Part of the sliding portion 213 passes through the strip hole 223 and extends out of the buffer seat 22.

[0044] Reference Figure 2 , Figure 3 The elastic buffer unit 23 in this embodiment includes two groups of telescopic springs 231, both of which are sleeved on the connecting shaft 211 and are arranged on both sides of the sliding portion 213. One end of one group of telescopic springs 231 abuts against the sliding portion 213, and the other end abuts against the bottom wall of the buffer groove 221. One end of the other group of telescopic springs 231 abuts against the sliding portion 213, and the other end abuts against the blocking portion 222.

[0045] When the speed of the head unit 1 changes, the connecting shaft 211 slides in the pin seat 21, and the telescopic spring 231 is squeezed and contracted by the sliding portion 213 to achieve a buffer connection between the pin seat 21 and the buffer seat 22; by providing two groups of telescopic springs 231, the pin seat 21 and the buffer seat 22 can achieve buffering in both acceleration and deceleration states.

[0046] Reference Figure 3 , Figure 4 The friction buffer units 24 in this embodiment are divided into two groups, and the two groups of friction buffer units 24 are respectively arranged on both sides of the extended sliding portion 213. The buffer seat 22 is fixed with support plates 232 on both sides of the extended sliding portion 213. The friction buffer units 24 in this embodiment include a friction plate 241 and a driving block 242. The support plate 232 is provided with a sliding groove 243 arranged along a sliding direction perpendicular to the connecting shaft 211. The friction plate 241 is provided with a sliding portion 244 for sliding in the sliding groove 243, so as to realize the sliding connection between the friction plate 241 and the support plate 232.

[0047] Reference Figure 3 , Figure 4A clamping piece 245 is provided on the friction plate 241, one end of the friction plate 241 is bent and opposite to the sliding portion 213. The clamping piece 245 in this embodiment includes a clamping plate 2451 and a clamping spring 2452. The clamping plate 2451 is arranged on the side of the friction plate 241 that is bent and opposite to the sliding portion 213. A plurality of guide rods 2453 are fixedly provided on the side of the pressure plate 2451 away from the sliding portion 213. Each guide rod 2453 is arranged along the sliding direction of the friction plate 241. The guide rod 2453 passes through the friction plate 241 and is slidably connected. The clamping spring 2452 is sleeved on the guide rod 2453. One end of the clamping spring 2452 abuts against the pressure plate 2451, and the other end abuts against the friction plate 241. The friction plate 241 presses the pressing plate 2451 onto the sliding portion 213 through the pressing spring 2452, thereby achieving a temporary friction force on the sliding portion 213. The setting of the pressing spring 2452 can avoid excessive friction force that causes the friction plate 241 and the sliding portion 213 to stick together.

[0048] Reference Figure 4 , Figure 5 The driving block 242 is fixedly arranged on the sliding part 213, and the friction plate 241 is provided with a guide structure 246. The guide structure 246 in this embodiment includes a guide groove 2461. The driving block 242 can be inserted into the guide groove 2461. The driving block 242 is rotatably connected to a roller 2462 at one end inserted into the guide groove 2461. The roller 2462 can roll along the groove wall of the guide groove 2461. The rolling of the roller 2462 replaces the sliding connection between the driving block 242 and the groove wall of the guide groove 2461, thereby reducing the friction loss between the driving block 242 and the friction plate 241. The sliding part 213 drives the driving block 242 to slide in the guide groove 2461, and under the guidance of the guide groove 2461, the friction plate 241 is pressed against the sliding part 213, thereby improving the stability of the driving block 242 driving the friction plate 241, and having a strong bearing capacity and being able to withstand a large load.

[0049] Reference Figure 5 , Figure 6The guide groove 2461 includes a first groove section 2463 and a second groove section 2464. The first groove section 2463 and the second groove section 2464 are designed in an eight-shaped shape with the opening facing upward. The connection between the first groove section 2463 and the second groove section 2464 is the lowest end of the guide groove 2461. When the tractor is stationary, the roller 2462 is located at the connection between the first groove section 2463 and the second groove section 2464. As the tractor accelerates or decelerates, the roller 2462 slides into the first groove section 2463 or the second groove section 2464. At this time, the friction plate 241 drives the pressure plate 2451 to move toward the sliding portion 213, and enables the pressure plate 2451 to be pressed against the sliding portion 213. Dividing the guide groove 2461 into a first groove section 2463 and a second groove section 2464 can ensure that the friction plate 241 can apply friction force to the sliding part 213 when the head unit 1 is in the acceleration and deceleration state, thereby improving the buffering effect between the cargo cart and the tractor.

[0050] The lengths of the first groove section 2463 and the second groove section 2464 are both greater than the sliding length of the driving block 242. As the pressure plate 2451 and the sliding portion 213 move, the pressure plate 2451 and the sliding portion 213 are continuously consumed. The lengths of the first groove section 2463 and the second groove section 2464 are set to be greater than the sliding length of the driving block 242, so that the driving block 242 slides a slightly longer distance to drive the pressure plate 2451 to be pressed against the sliding portion 213, thereby reducing the influence of friction consumption on the friction force between the pressure plate 2451 and the sliding portion 213.

[0051] Reference Figure 4 A wear-resistant coating 3 is provided on the contact surface of the pressure plate 2451 and the sliding part 213. The coating in this embodiment is one of graphene and ceramic. The setting of the wear-resistant coating 3 can reduce the friction consumption between the pressure plate 2451 and the sliding part 213, and extend the service life of the traction structure 2.

[0052] When the tractor accelerates, when the connecting shaft 211 slides in the buffer seat 22, the connecting shaft 211 drives the sliding part 213 to slide, and the sliding part 213 drives the driving block 242 to slide, and the driving block 242 drives the roller 2462 to slide into the first groove section 2463, and at the same time drives the friction plate 241 to slide down, and the friction plate 241 pressure plate 2451 presses down on the sliding part 213. At this time, the clamping spring 2452 is compressed, and the pressure plate 2451 applies friction force to the sliding part 213 to achieve buffering between the pin seat 21 and the buffer seat 22; as the sliding distance of the connecting shaft 211 increases, the compression amount of the clamping spring 2452 increases, and the friction force applied by the pressure plate 2451 to the sliding part 213 gradually increases, so as to increase the buffering effect between the pin seat 21 and the buffer seat 22. At the same time, it can reduce the squeezing of the telescopic spring 231 by the connecting shaft 211, and ensure that the telescopic spring 231 can work normally.

[0053] The implementation principle of a hydrogen fuel non-road tractor for port use in an embodiment of the present application is as follows: the cargo cart is installed on the pin seat 21 through a pin shaft, and then the head unit 1 is driven to move with hydrogen as a raw material. When the head unit 1 is accelerating or decelerating, relative sliding occurs between the pin seat 21 and the buffer seat 22. When the connecting shaft 211 slides in the pin seat 21, the corresponding telescopic spring 231 is squeezed and contracted by the sliding part 213 to achieve a buffer connection between the pin seat 21 and the buffer seat 22, so as to alleviate the impact between the pin seat 21 and the buffer seat 22. At the same time, when the connecting shaft 211 slides in the buffer seat 22, the connecting shaft 211 drives the sliding part 213 to slide, and the sliding part 213 drives the driving block 242 to slide, and the driving block 242 drives the roller 2462 to slide into the first groove section 2463, and at the same time drives the friction plate 241 to slide down, and the friction plate 241 pressure plate 2451 presses down on the sliding part 213. At this time, the clamping spring 2452 is compressed, and the pressure plate 2451 applies friction force to the sliding part 213 to achieve buffering between the pin seat 21 and the buffer seat 22. As the sliding distance of the connecting shaft 211 increases, the compression amount of the clamping spring 2452 increases, and the friction force applied by the pressure plate 2451 to the sliding part 213 gradually increases to reduce the impact between the cargo flatbed and the head unit 1, thereby improving the safety of cargo transportation by the tractor.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydrogen fuel non-road tractor for ports, characterized by: It comprises a vehicle head unit (1) using a hydrogen fuel cell system as a power source, wherein the tail of the vehicle head unit is provided with a traction structure (2) connected to a cargo panel truck; The traction structure (2) comprises a pin seat (21), a buffer seat (22), an elastic buffer unit (23) and a friction buffer unit (24); the buffer seat (22) is fixedly connected to the vehicle head unit (1); the buffer seat (22) can be detachably connected to the cargo truck via a pin shaft; the pin seat (21) and the buffer seat (22) are slidably connected via the elastic buffer unit (23) to form a buffer between the pin seat (21) and the buffer seat (22); the friction buffer unit (24) is arranged on the buffer seat (22) and can increase the friction force applied to the pin seat (21) as the sliding distance between the buffer seat (22) and the pin seat (21) increases.

2. The port-specific hydrogen fuel non-road tractor according to claim 1 is characterized by: The pin seat (21) comprises a connecting shaft (211), the connecting shaft (211) is inserted into the buffer seat (22) and is slidably connected, and a sliding portion (213) is fixedly provided on the connecting shaft (211); The elastic buffer unit (23) comprises two groups of telescopic springs (231), both groups of telescopic springs (231) are sleeved on the connecting shaft (211) and are arranged on both sides of the sliding portion (213), one end of each group of telescopic springs (231) is connected to the buffer seat (22), and the other end is connected to the sliding portion (213).

3. The port-specific hydrogen fuel non-road tractor according to claim 2 is characterized by: The friction buffer unit (24) comprises a friction plate (241) and a driving block (242); the friction plate (241) is slidably arranged on the buffer seat (22) along a sliding direction perpendicular to the connecting shaft (211); the driving block (242) is fixedly arranged on the sliding portion (213); a guide structure (246) is provided on the friction plate (241); the driving block (242) can drive the friction plate (241) to be pressed against the sliding portion (213) through the guide structure (246), and the friction force is positively correlated with the sliding distance of the connecting shaft (211).

4. The port-specific hydrogen fuel non-road tractor according to claim 3 is characterized by: The guide structure (246) comprises a guide groove (2461) provided on the driving block (242); the driving block (242) can be inserted into the guide groove (2461) and slidably connected to drive the friction plate (241) to be pressed against the sliding portion (213).

5. The port-specific hydrogen fuel non-road tractor according to claim 4 is characterized by: The guide groove (2461) comprises a first groove section (2463) and a second groove section (2464), wherein the first groove section (2463) and the second groove section (2464) are symmetrically arranged so that the connecting shaft (211) can slide in both directions to drive the friction plate (241) to press down the sliding portion (213).

6. The port-specific hydrogen fuel non-road tractor according to claim 4 is characterized by: A roller (2462) is rotatably sleeved on the driving block (242), and the roller (2462) is capable of rolling in the guide groove (2461).

7. The port-specific hydrogen fuel non-road tractor according to claim 3 is characterized by: The friction plate (241) is provided with a pressing member (245) abutting against the sliding portion (213); The clamping member (245) includes a pressure plate (2451) and a pressure spring (2452). The pressure plate (2451) is slidably arranged on the side of the friction plate (241) facing the sliding portion (213). The pressure spring (2452) is located between the pressure plate (2451) and the sliding portion (213), and its two ends are respectively connected to the pressure plate (2451) and the sliding portion (213). A guide rod (2453) is fixed on the pressure plate (2451), and the guide rod (2453) is slidably inserted on the friction plate (241).

8. The port-specific hydrogen fuel non-road tractor according to claim 7 is characterized by: A wear-resistant coating (3) is provided on the contact surface between the pressing plate (2451) and the sliding portion (213).

9. The port-specific hydrogen fuel non-road tractor according to claim 5, characterized in that: The lengths of the first slot section (2463) and the second slot section (2464) are both greater than the sliding length of the driving block (242).

10. The port-specific hydrogen fuel non-road tractor according to claim 9, characterized in that: The hydrogen raw material of the hydrogen fuel cell system of the vehicle head unit (1) is 10-70Mpa hydrogen.

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