High load capacity off-road fork truck

Abstract

This application relates to the field of engineering machinery technology, and in particular to a high-load-bearing off-road forklift, including an off-road forklift body and a working mechanism; the working mechanism includes a mast disposed at the front of the off-road forklift body and a fork-carrying assembly slidably disposed on the surface of the mast; the fork-carrying assembly includes a sliding plate slidably disposed on the surface of the mast, with vertical plates fixed at both ends of the sliding plate, and two symmetrical fork rods slidably disposed between the two vertical plates, with fork bodies fixed at the bottom ends of the two fork rods; an adjustment mechanism for adjusting the distance between the two fork rods is disposed between the two vertical plates; by setting up the off-road forklift body, the working mechanism and the adjustment mechanism, the off-road forklift can realize the adjustment of the distance between the two fork bodies during actual use, thereby enabling the off-road forklift to achieve the purpose of quickly adjusting the distance between the two fork bodies according to the size of different goods.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, and in particular to a high-load-bearing off-road forklift. Background Technology

[0002] Off-road forklifts, also known as field forklifts, are engineering vehicles that can safely and efficiently perform loading, unloading, stacking, and transporting operations on slopes and uneven ground. Like counterbalance forklifts, they can be equipped with forks or have various attachments changed to improve work efficiency.

[0003] As special engineering vehicles, off-road forklifts are widely used for material handling in harsh working conditions. In recent years, with the growth of industrial demand, high load capacity has become a core requirement. However, in actual use, the distance between the two forks of existing off-road forklifts is fixed and cannot be adjusted according to actual conditions.

[0004] Therefore, this application provides a high-load-bearing off-road forklift. Summary of the Invention

[0005] The purpose of this application is to solve at least one technical problem raised in the background art.

[0006] This application provides a high-load-bearing off-road forklift, including an off-road forklift body and a working mechanism;

[0007] The working mechanism includes a mast located at the front of the off-road forklift body and a forklift assembly slidably mounted on the surface of the mast. The front of the off-road forklift body is provided with a hydraulic adjustment system for adjusting the angle of the working mechanism, and the mast is provided with a hydraulic lifting system for automatically raising and lowering the forklift assembly.

[0008] The forklift assembly includes a sliding plate slidably disposed on the surface of the mast. Vertical plates are fixed at both ends of the sliding plate, and a support plate is fixed in the middle of the two vertical plates. Two symmetrical fork rods are slidably disposed in the middle of the two vertical plates, and a fork body is fixed at the bottom end of each of the two fork rods.

[0009] An adjustment mechanism for adjusting the distance between the two fork rods is provided between the two vertical plates. The adjustment mechanism includes two transverse threaded pins that are rotatably disposed on the opposite surfaces of the two vertical plates. The top of each of the two fork rods is provided with threaded holes that are threadedly connected to the outer surfaces of the two transverse threaded pins, and the thread directions of the two transverse threaded pins are opposite. The adjustment mechanism also includes a drive motor fixed on the upper surface of the sliding plate for driving the two transverse threaded pins to rotate simultaneously.

[0010] Preferably, a rectangular box is fixed on the lower surface of the sliding plate, one end of each of the two transverse threaded posts extends into the interior of the rectangular box, and a connecting shaft is fixed at the end of each of the two transverse threaded posts. Rotating holes that are rotatably connected to the outer surface of the transverse threaded posts are opened on both sides of the rectangular box.

[0011] By adopting the above technical solution, the stability of the transverse threaded column is effectively improved, and the rotation of the connecting shaft can drive the two transverse threaded columns to rotate simultaneously.

[0012] Preferably, the output end of the drive motor passes through the sliding plate and extends into the interior of the rectangular box, and a driving bevel gear is fixedly provided at the bottom end of the output end of the drive motor, and a driven bevel gear that meshes with the driving bevel gear is fixedly provided on the surface of the connecting shaft.

[0013] By adopting the above technical solution, the rotation of the drive motor can drive the active bevel gear to rotate, which in turn drives the driven bevel gear to rotate, and the rotation of the driven bevel gear can drive the connecting shaft to rotate automatically.

[0014] Preferably, limiting rods are fixed on the opposite surfaces of the two vertical plates, limiting blocks are fixed on the back of the two fork rods, and limiting sliding holes that slide in contact with the surface of the limiting rods are opened on the sides of the two limiting blocks.

[0015] By adopting the above technical solution, during the rotation of the transverse threaded column, the fork rod can be limited by the action of the limiting block and the limiting rod, so that the fork rod cannot follow the rotation of the transverse threaded column, and thus the rotation of the transverse threaded column can drive the fork rod to move laterally.

[0016] Preferably, both vertical plates are provided with a limiting mechanism on their sides to limit the cylindrical material after the working mechanism forks it up.

[0017] By adopting the above technical solution, the off-road forklift can effectively limit the movement of cylindrical materials, such as cylindrical timber or pipes.

[0018] Preferably, the limiting mechanism includes a strip frame fixed to the side of the vertical plate and a rotating shaft rotatably disposed on the inner wall of the strip frame. One end of the rotating shaft extends to the outer surface of the strip frame, and an arc-shaped limiting frame is fixed to the end of the rotating shaft.

[0019] By adopting the above technical solution, the rotation of the shaft can drive the arc-shaped limiting frame to rotate, thereby enabling the arc-shaped limiting frame to effectively limit the cylindrical materials on the fork body, improving the stability of cylindrical materials during transportation and transfer.

[0020] Preferably, a sealing box is fixedly provided on the inner wall of the strip frame, a piston plate is slidably provided on the inner wall of the sealing box, a vertical rod is fixedly provided at the bottom end of the piston plate, the bottom end of the vertical rod extends to the lower surface of the sealing box and is fixedly provided with an L-shaped straight toothed rack, and a sealing hole is opened on the lower surface of the sealing box to be slidably connected with the surface of the vertical rod.

[0021] By adopting the above technical solution, the movement of the piston plate can drive the vertical rod to move, thereby driving the L-shaped rack to move automatically downwards or upwards through the rotation of the vertical rod.

[0022] Preferably, a toothed disc is fixedly mounted on the surface of the rotating shaft, and the toothed disc meshes with an L-shaped straight rack.

[0023] By adopting the above technical solution, when the L-shaped straight rack moves downward, it can drive the gear plate to rotate automatically, thereby driving the rotating shaft to rotate automatically through the rotation of the gear plate.

[0024] Preferably, the lower surface of the sliding plate has two symmetrical strip grooves, and the inner walls of the two strip grooves are fixedly provided with cylindrical telescopic airbags. The top ends of the two fork rods are fixedly provided with sliders. The top ends of the two sliders are slidably connected to the inner walls of the two strip grooves, and the outer surfaces of the two sliders are fixedly connected to the pressing ends of the two cylindrical telescopic airbags.

[0025] By adopting the above technical solution, the cylindrical telescopic airbag can be automatically squeezed by the slider while the fork rod moves to both sides during the rotation of the transverse threaded column.

[0026] Preferably, a return spring is fixedly provided on the inner wall of the cylindrical telescopic airbag, and a connecting pipe is provided at the end of the cylindrical telescopic airbag, which passes through the inner wall of the strip groove and the vertical plate and extends into the inside of the strip frame. The end of the connecting pipe away from the cylindrical telescopic airbag extends to the inner top of the sealing box.

[0027] By adopting the above technical solution, the cylindrical telescopic airbag can be automatically reset under the action of the reset spring. Moreover, when the cylindrical telescopic airbag is compressed, it can force air into the top of the sealed box through the connecting pipe, thereby driving the piston plate to move automatically.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The high-load-bearing off-road forklift described in this application, by setting up an off-road forklift body, a working mechanism, and an adjustment mechanism, enables the off-road forklift to adjust the distance between the two fork bodies by starting the drive motor to rotate the active bevel gear according to the size and width of different work materials during actual use. The rotation of the active bevel gear drives the driven bevel gear and the connecting shaft to rotate automatically. The rotation of the connecting shaft drives two transverse threaded columns to rotate simultaneously. The rotation of the two transverse threaded columns drives the two fork arms to move simultaneously to the middle or to both sides, thereby achieving the purpose of quickly adjusting the distance between the two fork bodies according to the size of different goods.

[0030] 2. The high-load-bearing off-road forklift described in this application, by setting a limiting mechanism, enables the forklift to operate in the field, especially when handling cylindrical materials such as trees or pipes. When the cylindrical material needs to be transferred after being lifted, the drive motor can be activated to move both fork bodies simultaneously to both sides, maximizing the distance between the two fork bodies and improving the stability of the cylindrical material during transport. Simultaneously, when the two fork arms move to both sides, the movement of the fork arms can drive the slider to move inside the strip groove, and the movement of the slider can adjust the position of the cylindrical material. The cylindrical telescopic airbag is compressed, causing it to contract. This allows air from the cylindrical telescopic airbag to enter the top of the sealed box through the connecting pipe, which in turn moves the piston plate downwards. The downward movement of the piston plate moves the vertical rod and the L-shaped rack downwards. When the L-shaped rack moves downwards, it causes the toothed disc to rotate automatically. The rotation of the toothed disc causes the rotating shaft and the arc-shaped limit frame to rotate automatically, which in turn causes the arc-shaped limit frame to rotate forward automatically, effectively limiting the cylindrical material on the fork body and further improving the stability of cylindrical materials during transportation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0032] Figure 2 This is a side view of the structure of Embodiment 1 of this application;

[0033] Figure 3 This is a schematic diagram of the forklift assembly structure in Embodiment 1 of this application;

[0034] Figure 4 This is a schematic diagram of the internal structure of the rectangular box of the adjustment mechanism in Embodiment 1 of this application;

[0035] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this application;

[0036] Figure 6 This is a rear view structural diagram of Embodiment 2 of this application;

[0037] Figure 7 This is a partial cross-sectional structural diagram of the sliding plate in Embodiment 2 of this application;

[0038] Figure 8 This is a schematic cross-sectional view of the sealing box in Embodiment 2 of this application;

[0039] Figure 9 This application Figure 5 Enlarged structural diagram at point A in the middle.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Off-road forklift body;

[0042] 200. Operating mechanism; 201. Mast; 202. Forklift assembly; 2021. Sliding plate; 2022. Vertical plate; 2023. Support plate; 2024. Fork rod; 2025. Fork body;

[0043] 300. Adjustment mechanism; 301. Horizontal threaded column; 302. Drive motor; 303. Rectangular box; 304. Connecting shaft; 305. Driving bevel gear; 306. Driven bevel gear; 307. Limiting rod; 308. Limiting block;

[0044] 400. Limiting mechanism; 401. Strip frame; 402. Rotating shaft; 403. Arc-shaped limiting frame; 404. Sealing box; 405. Piston plate; 406. Vertical rod; 407. L-shaped straight rack; 408. Gear plate; 409. Columnar telescopic airbag; 4010. Slider; 4011. Connecting pipe. Detailed Implementation

[0045] The following combination Figures 1 to 9 This application will be described in further detail below.

[0046] Example 1

[0047] Please refer to Figures 1 to 4A high-load-bearing off-road forklift includes an off-road forklift body 100 and a working mechanism 200. The working mechanism 200 includes a mast 201 disposed at the front of the off-road forklift body 100 and a forklift assembly 202 slidably disposed on the surface of the mast 201. A hydraulic adjustment system for adjusting the angle of the working mechanism 200 is provided at the front of the off-road forklift body 100. A hydraulic lifting system for automatically raising and lowering the forklift assembly 202 is provided inside the mast 201. The forklift assembly 202 includes a sliding plate 2021 slidably disposed on the surface of the mast 201. Vertical plates 2022 are fixed at both ends of the sliding plate 2021, and a support plate 2023 is fixed between the two vertical plates 2022. Two symmetrical fork arms 2024 are slidably arranged in the middle of the 2, and the bottom end of each fork arm 2024 is fixedly provided with a fork body 2025; an adjustment mechanism 300 for adjusting the distance between the two fork arms 2024 is provided in the middle of the two vertical plates 2022. The adjustment mechanism 300 includes two transverse threaded posts 301 that are rotatably arranged on the opposite surfaces of the two vertical plates 2022. The top end of each fork arm 2024 is provided with threaded holes that are threadedly connected to the outer surface of the two transverse threaded posts 301, and the thread directions of the two transverse threaded posts 301 are opposite. The adjustment mechanism 300 also includes a drive motor 302 fixed on the upper surface of the sliding plate 2021 for driving the two transverse threaded posts 301 to rotate simultaneously.

[0048] The off-road forklift body 100 includes a chassis, a frame, and a housing mounted on the chassis. A diesel engine is installed inside the housing. The chassis includes a transmission system, a walking system, a steering system, and a braking system installed inside the housing.

[0049] Please refer to Figure 3 , Figure 4 A rectangular box 303 is fixed on the lower surface of the sliding plate 2021. One end of each of the two transverse threaded posts 301 extends into the interior of the rectangular box 303, and a connecting shaft 304 is fixed at the end of each of the two transverse threaded posts 301. Rotating holes that are rotatably connected to the outer surface of the transverse threaded posts 301 are opened on both sides of the rectangular box 303.

[0050] Specifically, it effectively improves the stability of the transverse threaded post 301, and at the same time, it can drive the two transverse threaded posts 301 to rotate simultaneously through the rotation of the connecting shaft 304.

[0051] Please refer to Figure 3 , Figure 4 The output end of the drive motor 302 passes through the sliding plate 2021 and extends into the interior of the rectangular box 303. The bottom end of the output end of the drive motor 302 is fixed with an active bevel gear 305, and the surface of the connecting shaft 304 is fixed with a driven bevel gear 306 that meshes with the active bevel gear 305.

[0052] Specifically, the rotation of the drive motor 302 can drive the active bevel gear 305 to rotate, which in turn drives the driven bevel gear 306 to rotate, and the rotation of the driven bevel gear 306 can drive the connecting shaft 304 to rotate automatically.

[0053] Please refer to Figure 3 , Figure 4 Limiting rods 307 are fixed on the opposite surfaces of the two vertical plates 2022, and limiting blocks 308 are fixed on the back of the two fork rods 2024. Limiting sliding holes that slide with the surface of the limiting rods 307 are opened on the sides of the two limiting blocks 308.

[0054] Specifically, during the rotation of the transverse threaded post 301, the fork lever 2024 can be limited by the action of the limiting block 308 and the limiting rod 307, so that the fork lever 2024 cannot rotate with the transverse threaded post 301, and thus the rotation of the transverse threaded post 301 can drive the fork lever 2024 to move laterally.

[0055] In this embodiment, by setting up an off-road forklift body 100, a working mechanism 200, and an adjustment mechanism 300, the off-road forklift can, during actual use, adjust the distance between the two forklift bodies 2025 according to the size and width of different work materials. This is achieved by starting the drive motor 302 to drive the active bevel gear 305 to rotate, which in turn drives the driven bevel gear 306 and the connecting shaft 304 to rotate automatically. The rotation of the connecting shaft 304 drives the two transverse threaded posts 301 to rotate simultaneously, which in turn drives the two fork arms 2024 to move simultaneously toward the center or to both sides, thereby adjusting the distance between the two fork bodies 2025. This allows the off-road forklift to quickly adjust the distance between the two fork bodies 2025 according to the size of different goods.

[0056] Example 2

[0057] Based on Example 1, referring to Figures 5 to 9 And unlike Example 1, the following is true:

[0058] Please refer to Figure 5 , Figure 6 Both vertical plates 2022 are equipped with a limiting mechanism 400 on their sides, which limits the cylindrical material after the working mechanism 200 forks it up.

[0059] Specifically, this enables the off-road forklift to effectively limit the movement of cylindrical materials, such as logs or pipes.

[0060] Please refer to Figure 5 , Figure 6The limiting mechanism 400 includes a strip frame 401 fixed on the side of the vertical plate 2022, and a rotating shaft 402 rotatably disposed on the inner wall of the strip frame 401. One end of the rotating shaft 402 extends to the outer surface of the strip frame 401, and an arc-shaped limiting frame 403 is fixed at the end of the rotating shaft 402.

[0061] Specifically, the rotation of the pivot 402 can drive the arc-shaped limit frame 403 to rotate, thereby enabling the arc-shaped limit frame 403 to effectively limit the cylindrical material on the fork body 2025, improving the stability of the cylindrical material during transportation and transfer.

[0062] Please refer to Figure 8 , Figure 9 A sealing box 404 is fixedly provided on the inner wall of the strip frame 401. A piston plate 405 is slidably provided on the inner wall of the sealing box 404. A vertical rod 406 is fixedly provided at the bottom end of the piston plate 405. The bottom end of the vertical rod 406 extends to the lower surface of the sealing box 404 and is fixedly provided with an L-shaped straight toothed rack 407. A sealing hole is opened on the lower surface of the sealing box 404, which is slidably connected to the surface of the vertical rod 406.

[0063] Specifically, the movement of the piston plate 405 can drive the vertical rod 406 to move, thereby driving the L-shaped rack 407 to move automatically downwards or upwards through the rotation of the vertical rod 406.

[0064] Please refer to Figure 8 , Figure 9 A gear disk 408 is fixed on the surface of the rotating shaft 402, and the gear disk 408 meshes with the L-shaped straight rack 407.

[0065] Specifically, when the L-shaped straight rack 407 moves downward, it can drive the gear disk 408 to rotate automatically, thereby driving the rotating shaft 402 to rotate automatically through the rotation of the gear disk 408.

[0066] Please refer to Figure 8 , Figure 9 The lower surface of the sliding plate 2021 has two symmetrical strip grooves, and the inner walls of the two strip grooves are fixedly provided with cylindrical telescopic airbags 409. The top ends of the two fork rods 2024 are fixedly provided with sliders 4010. The top ends of the two sliders 4010 are slidably connected to the inner walls of the two strip grooves, and the outer surfaces of the two sliders 4010 are fixedly connected to the pressing ends of the two cylindrical telescopic airbags 409.

[0067] Specifically, as the transverse threaded column 301 rotates, it drives the fork lever 2024 to move to both sides, and the slider 4010 automatically compresses the cylindrical telescopic airbag 409.

[0068] Please refer to Figure 8 , Figure 9A return spring is fixedly provided on the inner wall of the cylindrical telescopic airbag 409, and a connecting pipe 4011 is provided at the end of the cylindrical telescopic airbag 409, which passes through the inner wall of the strip groove and the vertical plate 2022 and extends into the inside of the strip frame 401. The end of the connecting pipe 4011 away from the cylindrical telescopic airbag 409 extends to the inner top of the sealing box 404.

[0069] Specifically, the cylindrical telescopic airbag 409 can automatically reset under the action of the return spring, and when the cylindrical telescopic airbag 409 is compressed, it can force air into the top of the sealing box 404 through the connecting pipe 4011, thereby driving the piston plate 405 to move automatically.

[0070] In this embodiment, by setting a limiting mechanism 400, when the off-road forklift is operating in the field, especially when handling cylindrical materials such as trees or pipes, the drive motor 302 can be activated to move both fork bodies 2025 to both sides simultaneously after the cylindrical material is lifted and needs to be transferred. This maximizes the distance between the two fork bodies 2025, improving the stability of the cylindrical material during transport. Simultaneously, when the two fork arms 2024 move to both sides, the movement of the fork arms 2024 can drive the slider 4010 to move inside the slot. The movement of the slider 4010 can compress the cylindrical telescopic airbag 409, causing the cylindrical material to... The telescopic airbag 409 contracts, allowing air inside the cylindrical telescopic airbag 409 to enter the inner top of the sealing box 404 through the connecting pipe 4011. This causes the piston plate 405 to move downwards. The downward movement of the piston plate 405 causes the vertical rod 406 and the L-shaped rack 407 to move downwards. When the L-shaped rack 407 moves downwards, it causes the toothed disc 408 to rotate automatically. The rotation of the toothed disc 408 causes the rotating shaft 402 and the arc-shaped limit frame 403 to rotate automatically. This allows the arc-shaped limit frame 403 to rotate forward automatically, effectively limiting the cylindrical material on the fork body 2025, thereby further improving the stability of the cylindrical material during transportation.

[0071] It should be noted that when handling ordinary materials, when adjusting the distance between the two fork bodies 2025 by rotating the drive motor 302, such as... Figure 1 The state shown represents the maximum spacing between the two fork bodies (2025). This is suitable for handling cylindrical materials, such as cylindrical trees or pipes. Figure 5 The state shown is the state where the distance between the two fork bodies is the smallest.

[0072] Working principle:

[0073] In practical use, this off-road forklift can adjust the distance between the two fork bodies 2025 by starting the drive motor 302 to rotate the active bevel gear 305, which in turn rotates the driven bevel gear 306 and the connecting shaft 304, according to the size and width of the materials being handled. The rotation of the drive motor 302 drives the active bevel gear 305 to rotate, which in turn rotates the driven bevel gear 306 and the connecting shaft 304, thereby adjusting the distance between the two fork bodies 2025. This allows the off-road forklift to quickly adjust the distance between the two fork bodies 2025 according to the size of the goods. Furthermore, when operating in the field, especially when handling cylindrical materials such as trees or pipes, the forklift can activate the drive motor 302 to move the two fork bodies 2025 simultaneously to the sides after lifting the material, thus adjusting the distance between the two fork bodies 2025. This maximizes the stability of cylindrical materials during transport. Simultaneously, when both fork levers 2024 move to the sides, their movement drives the slider 4010 to move within the slot. The slider 4010 compresses the cylindrical telescopic airbag 409, causing it to contract. This allows air from the airbag 409 to enter the top of the sealed box 404 through the connecting pipe 4011, and then drives the piston plate 405. Moving downwards, the piston plate 405 moves downwards, which in turn drives the vertical rod 406 and the L-shaped rack 407 to move downwards. When the L-shaped rack 407 moves downwards, it drives the toothed disc 408 to rotate automatically. The rotation of the toothed disc 408 drives the rotating shaft 402 and the arc-shaped limit frame 403 to rotate automatically, thereby enabling the arc-shaped limit frame 403 to rotate forward automatically, effectively limiting the cylindrical material on the fork body 2025, and further improving the stability of the cylindrical material when transporting it.

Claims

1. A high-load-bearing off-road forklift, characterized in that, Includes the forklift body (100) and the working mechanism (200); The working mechanism (200) includes a mast (201) disposed at the front of the forklift body (100) and a forklift assembly (202) slidably disposed on the surface of the mast (201). The front of the forklift body (100) is provided with a hydraulic adjustment system for adjusting the angle of the working mechanism (200), and the mast (201) is provided with a hydraulic lifting system for automatically lifting the forklift assembly (202). The forklift assembly (202) includes a sliding plate (2021) slidably disposed on the surface of the mast (201). Vertical plates (2022) are fixed at both ends of the sliding plate (2021), and a support plate (2023) is fixed in the middle of the two vertical plates (2022). Two symmetrical fork rods (2024) are slidably disposed in the middle of the two vertical plates (2022), and a fork body (2025) is fixed at the bottom end of each of the two fork rods (2024). An adjustment mechanism (300) for adjusting the distance between the two vertical plates (2022) is provided in the middle of the two vertical plates (2022). The adjustment mechanism (300) includes two transverse threaded posts (301) respectively rotatably disposed on the opposite surfaces of the two vertical plates (2022). The top ends of the two vertical plates (2024) are provided with threaded holes respectively threaded to the outer surfaces of the two transverse threaded posts (301), and the thread directions of the two transverse threaded posts (301) are opposite. The adjustment mechanism (300) also includes a drive motor (302) fixed on the upper surface of the sliding plate (2021) for driving the two transverse threaded posts (301) to rotate simultaneously.

2. The high-load-bearing off-road forklift according to claim 1, characterized in that, A rectangular box (303) is fixed on the lower surface of the sliding plate (2021). One end of each of the two transverse threaded posts (301) extends into the interior of the rectangular box (303), and a connecting shaft (304) is fixed at the end of each of the two transverse threaded posts (301). Rotating holes that are rotatably connected to the outer surface of the transverse threaded posts (301) are provided on both sides of the rectangular box (303).

3. A high-load-bearing off-road forklift according to claim 2, characterized in that, The output end of the drive motor (302) passes through the sliding plate (2021) and extends into the interior of the rectangular box (303). The bottom end of the output end of the drive motor (302) is fixed with an active bevel gear (305), and the surface of the connecting shaft (304) is fixed with a driven bevel gear (306) that meshes with the active bevel gear (305).

4. A high-load-bearing off-road forklift according to claim 1, characterized in that, Limiting rods (307) are fixed on the opposite surfaces of the two vertical plates (2022), and limiting blocks (308) are fixed on the back of the two fork rods (2024). Limiting sliding holes that slide with the limiting rods (307) are opened on the sides of the two limiting blocks (308).

5. A high-load-bearing off-road forklift according to claim 1, characterized in that, Both vertical plates (2022) are provided with a limiting mechanism (400) on their sides to limit the cylindrical material after the working mechanism (200) forks it up.

6. A high-load-bearing off-road forklift according to claim 5, characterized in that, The limiting mechanism (400) includes a strip frame (401) fixed on the side of the vertical plate (2022) and a rotating shaft (402) rotatably disposed on the inner wall of the strip frame (401). One end of the rotating shaft (402) extends to the outer surface of the strip frame (401), and an arc-shaped limiting frame (403) is fixed at the end of the rotating shaft (402).

7. A high-load-bearing off-road forklift according to claim 6, characterized in that, A sealing box (404) is fixedly provided on the inner wall of the strip frame (401). A piston plate (405) is slidably provided on the inner wall of the sealing box (404). A vertical rod (406) is fixedly provided at the bottom end of the piston plate (405). The bottom end of the vertical rod (406) extends to the lower surface of the sealing box (404) and is fixedly provided with an L-shaped straight toothed rack (407). A sealing hole is opened on the lower surface of the sealing box (404) and is slidably connected to the surface of the vertical rod (406).

8. A high-load-bearing off-road forklift according to claim 7, characterized in that, A toothed disc (408) is fixedly mounted on the surface of the rotating shaft (402), and the toothed disc (408) meshes with the L-shaped straight rack (407).

9. A high-load-bearing off-road forklift according to claim 8, characterized in that, The lower surface of the sliding plate (2021) has two symmetrical strip grooves, and the inner walls of the two strip grooves are fixedly provided with cylindrical telescopic airbags (409). The top ends of the two fork rods (2024) are fixedly provided with sliders (4010). The top ends of the two sliders (4010) are slidably connected to the inner walls of the two strip grooves, and the outer surfaces of the two sliders (4010) are fixedly connected to the pressing ends of the two cylindrical telescopic airbags (409).

10. A high-load-bearing off-road forklift according to claim 9, characterized in that, The inner wall of the cylindrical telescopic airbag (409) is fixed with a return spring, and the end of the cylindrical telescopic airbag (409) is provided with a connecting pipe (4011) that passes through the inner wall of the strip groove and the vertical plate (2022) and extends into the inside of the strip frame (401). The end of the connecting pipe (4011) away from the cylindrical telescopic airbag (409) extends to the inner top of the sealing box (404).

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