Environment-friendly material distribution vehicle with self-adapting seal

Abstract

The present application relates to the technical field of distribution vehicle transport tail door, and discloses an environmentally-friendly material distribution vehicle transport tail door with self-adaptive sealing, which comprises a door frame and a door body movably arranged in the door frame, two fixed seats are symmetrically and fixedly installed on the surface of the lower end of the door body, and the environmentally-friendly material distribution vehicle transport tail door with self-adaptive sealing adopts an inflatable air cushion as a sealing component, relies on a motor linkage air cylinder piston to complete air cushion inflation and deflation, and the air cushion expands after inflation to self-adaptively compensate various gaps caused by vehicle body deformation, component wear and assembly tolerance.Compared with a traditional fixed rubber sealing strip, the environmentally-friendly material distribution vehicle transport tail door with self-adaptive sealing can comprehensively block the uneven gaps between the door frame and the door body, effectively prevents powder and granular material from leaking dust and falling and losing during transportation, reduces road dust pollution, meets the green and environmentally-friendly requirements of goods transportation, blocks the penetration of rain, snow and water vapor into the vehicle compartment, avoids the dampness and damage of goods in the vehicle compartment, and reduces the material transportation damage cost.

Description

Technical Field

[0001] This invention relates to the field of delivery vehicle tailgate technology, specifically an environmentally friendly material delivery vehicle tailgate with adaptive sealing. Background Technology

[0002] With the implementation of dual-carbon policies, increasingly stringent urban road dust control, and the full implementation of green logistics policies, the modern logistics and distribution industry is rapidly developing towards greening, standardization, and efficiency. As the core carrier for short-distance material transfer and urban material distribution, box-type material delivery vehicles are widely used in various scenarios such as supermarket distribution, industrial material transfer, fresh material transportation, and delivery of loose goods due to their advantages of flexibility, mobility, and wide adaptability. The market application scale continues to expand.

[0003] The tailgate, as the core component for opening and closing and a key sealing unit at the rear of a van, serves not only as the loading and unloading channel for goods entering and exiting the vehicle but also as a crucial barrier isolating the vehicle from the internal and external environments. Its sealing performance and opening / closing stability directly affect the overall airtightness of the vehicle, the integrity of goods storage and transportation, and the level of road surface hygiene. It is a key component for achieving clean transportation, reducing cargo damage, and meeting environmental regulations, and a core structure for ensuring the quality of delivery operations. However, existing delivery vehicle tailgates still have certain shortcomings, such as:

[0004] The patent application CN202222453067.3, entitled "A Rear Door Structure for a Box Truck," features a simple sealing structure, mostly consisting of a fixed rubber sealing strip installed as a single unit. The sealing strip's size and compression are fixed parameters. Under the influence of long-term vehicle travel, frequent opening and closing of the tailgate causing wear, slight vehicle body deformation, and assembly tolerances, uneven gaps easily develop between the tailgate and the truck body frame. These gaps cannot be completely sealed off due to self-compensation. This is particularly problematic for transporting powdered materials, granular materials, dusty industrial raw materials, and fine debris. These gaps allow dust and fine materials to leak out during transport, resulting in material loss, increased operating costs, and pollution of urban roads. This violates current green and clean transportation standards in the logistics industry. Furthermore, in rainy or snowy weather, these gaps allow rainwater and moisture to seep into the truck body, easily damaging damp materials and packaging, significantly increasing the breakage rate.

[0005] In view of this, we conducted in-depth research on the above problems and proposed an adaptive sealing environmentally friendly material delivery vehicle tailgate. Summary of the Invention

[0006] The purpose of this invention is to provide an environmentally friendly, self-sealing tailgate for material delivery vehicles, in order to solve the problem mentioned in the background art that existing tailgates for delivery vehicles cannot adaptively compensate for gaps to achieve a complete seal.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an adaptive sealing environmentally friendly material delivery vehicle tailgate, comprising a door frame and a door body movable inside therein;

[0008] Two fixed seats are symmetrically fixedly installed at the lower end of the door body, and two corner seats are symmetrically fixedly installed at the lower end of the door frame. The fixed seats are rotatably connected to the corresponding corner seats. The inner wall of the door frame is provided with a mounting ring groove, and an air cushion for sealing between the door frame and the door body is provided in the mounting ring groove. A power mechanism for opening and closing the door body is provided on the door frame, and the top surface of the door frame is fixedly installed on the box body. An air control mechanism for inflating and deflating the air cushion is provided on the box body, and the air control mechanism is connected to a drive mechanism installed on the top surface of the box body. The box body and the door body are connected by a locking mechanism, and the locking mechanism is connected to the drive mechanism through a transmission mechanism.

[0009] By adopting the above technical solution, it is easy to fill the gap between the door body and the door frame by inflating the air cushion, and simultaneously lock the structure to achieve integrated sealing and locking of the tailgate, effectively preventing material spillage and dust, and improving the environmental protection and sealing effect.

[0010] As a preferred embodiment of the present invention, the power mechanism includes hydraulic cylinders arranged on the left and right sides of the door frame, and the hydraulic cylinders are rotatably mounted on the hinge seat, and the hinge seat is fixedly mounted on the surface of the door frame. The output end of the hydraulic cylinder is rotatably connected to a connecting rod, and the inner end of the connecting rod is fixedly mounted with a connecting seat, and the connecting seat is fixedly mounted on the surface of the door body.

[0011] By adopting the above technical solution, the hydraulic cylinder can be installed in a hinged floating form, which can adapt to the angle changes during the door's flipping process. The connecting rod and connecting seat form a linkage transmission pair, and the door opens and closes by relying on the hinged fulcrum formed by the corner seat and fixed seat at the bottom of the door. This avoids the mechanism jamming caused by hard pushing and pulling, and ensures that the tailgate is opened and closed with uniform force and runs smoothly.

[0012] As a preferred technical solution of the present invention, the air control mechanism includes two air cylinders symmetrically and fixedly installed on the bottom surface of the housing, and a piston adapted to it is provided inside the air cylinder. The outer side of the piston is fixedly connected to one end of the straight rod. The outer side wall of the air cylinder is fixedly connected to one end of the through pipe, and the through pipe passes through the top of the door frame and is fixedly connected to the mounting ring groove and the air cushion.

[0013] The above technical solution allows for easy adjustment of the cavity volume by the piston sliding back and forth inside the cylinder. Compressed air is directionally delivered to the air cushion in the mounting ring groove through the pipe to complete the inflation, expansion, and sealing. When the piston retracts in the opposite direction to create negative pressure, the gas inside the air cushion can be drawn in to achieve depressurization and contraction. The degree of air cushion deformation can be controlled, and the two working states of sealing and unlocking can be flexibly switched. By controlling the expansion and contraction of the air cushion, the sealing state can be controlled and adjusted.

[0014] As a preferred embodiment of the present invention, the driving mechanism includes a bidirectional motor fixedly installed on the top surface of the housing, and both shaft ends of the bidirectional motor are connected to threaded rods by keys. A movable plate is sleeved on the outer side of the threaded rod, and the threaded rod is threadedly connected to the movable plate. The top surface of the movable plate is laterally slidably connected to the top surface of the housing by a slide rail, and the movable plate is fixedly connected to the other end of the straight rod.

[0015] By adopting the above technical solution, the bidirectional motor can change the direction of rotation of the threaded rod by rotating in both directions. Under the constraint of the slide rail limit, the movable plate converts the rotational motion of the threaded rod into linear translation, and synchronously pulls the straight rod to drive the piston to perform the inflation and deflation action.

[0016] As a preferred embodiment of the present invention, a fixing block is provided on the outer side of the movable plate, and the fixing block is fixed to the inner top surface of the box. The threaded rod passes through the fixing block laterally, and the threaded rod and the fixing block are rotatably connected by a bearing.

[0017] By adopting the above technical solution, it is easy for the fixed block to cooperate with the bearing to limit the threaded rod, limiting the screw to only rotate and not move, thus ensuring the stability of the screw drive and equipment operation.

[0018] As a preferred technical solution of the present invention, the locking mechanism includes a fixed straight plate fixedly connected to the left and right sides of the upper surface of the door body, and a locking seat fixedly connected to the fixed straight plate. A locking hole is vertically opened on the locking seat, and a locking rod is movably inserted into the locking hole. The locking rod vertically penetrates the bottom of the box body, and the locking rod is slidably connected to the bottom of the box body.

[0019] The above technical solution facilitates the vertical insertion of the locking rod into the locking hole of the locking seat after the tailgate is closed, forming a rigid mechanical limit between the box and the door, which counteracts the risk of the door loosening caused by vehicle bumps and vibrations. Combined with the air cushion flexible seal, it forms a dual protection of rigidity and flexibility, greatly improving the reliability of the tailgate closure.

[0020] As a preferred embodiment of the present invention, a limiting plate is fixedly installed on the upper surface of the locking rod, and the limiting plate is located inside the housing.

[0021] By adopting the above technical solution, the limiting plate can effectively restrict the downward movement of the locking rod, preventing the locking rod from falling off and failing, and improving the safety of the locking structure.

[0022] As a preferred embodiment of the present invention, the transmission mechanism includes a worm gear coaxially fixedly installed on the outer end of a threaded rod, and the outer end of the worm gear is rotatably connected to the inner wall of the housing through a bearing. A worm wheel is meshed with one side of the worm gear and is fixedly installed on the surface of the threaded rod. The top end of the threaded rod is rotatably connected to the inner top surface of the housing through a bearing, and the threaded rod extends into a threaded groove on the locking rod. The threaded rod is threadedly connected to the threaded groove.

[0023] By adopting the above technical solution, the worm gear can convert the horizontal rotation of the threaded rod into the vertical rotation of the screw, thereby driving the locking rod to rise and fall, and realizing the synchronous linkage of air sealing and mechanical locking.

[0024] As a preferred embodiment of the present invention, the longitudinal centerline of the screw is collinear with the longitudinal centerline of the locking rod.

[0025] By adopting the above technical solution, the screw and locking rod can be arranged coaxially, the threaded transmission is evenly stressed, the locking rod can be raised and lowered without jamming, and the locking action is smooth and reliable.

[0026] As a preferred embodiment of the present invention, an electric heating plate is fixedly installed on the inner wall of the outer side of the air cylinder.

[0027] By adopting the above technical solution, the electric heating plate can preheat the air inside the air cylinder in low-temperature environments, making up for the insufficient air volume caused by the thermal contraction of low-temperature air, ensuring that the air cushion expansion meets the sealing requirements under low-temperature conditions, and achieving stable adaptive sealing in all seasons and all weather conditions.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The environmentally friendly material delivery vehicle tailgate with adaptive sealing uses an inflatable air cushion as a sealing component. The air cushion is inflated and deflated by a motor-driven air cylinder piston. After inflation, the air cushion expands and can adaptively compensate for various gaps caused by vehicle body deformation, component wear, and assembly tolerances. Compared with traditional fixed rubber sealing strips, it can seal the uneven gap between the door frame and the door body in all directions, effectively preventing dust leakage and loss of fine materials during transportation of powder and granular materials, reducing road dust pollution, meeting the requirements of green and environmentally friendly cargo transportation, and preventing rain, snow and water vapor from seeping into the compartment, avoiding damage to the goods inside the compartment due to moisture, and reducing the cost of material transportation damage. 1. The bidirectional motor drives the threaded rod, movable plate and piston to push and compress the air in the air cylinder and fill the air cushion inside the mounting ring groove through the pipe. The air cushion inflates and expands to automatically fill the various gaps between the door and the door frame. It achieves self-adaptive sealing by inflating and deforming, which can prevent powder and particulate matter from falling and causing dust, thus reducing environmental damage, and also prevent rainwater from entering the warehouse to avoid the goods from getting damp. 2. The pressure sensor installed at the pipe collects the air pressure data of the air cushion cavity in real time. When the vehicle is bumpy and leaks air or the air pressure drops due to temperature changes, the bidirectional motor can briefly adjust the forward rotation to drive the piston to supplement the air supply. If the air pressure exceeds the standard, it will release pressure in reverse. Dynamic pressure stabilization can maintain the air cushion sealing performance in all seasons and various road conditions, achieving stable sealing in all weather. 3. When the bidirectional motor drives the threaded rod to rotate, the coaxial worm gear and worm wheel work together to reverse the transmission, converting the horizontal rotation into the vertical rotation of the screw. The screw is screwed into the threaded groove of the locking rod, which drives the locking rod to insert downward into the locking hole of the locking seat, thus completing the mechanical locking of the door. When rotating in the reverse direction, the locking rod is lifted and pulled out to unlock the door. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the left side view of the present invention; Figure 2 This is a schematic diagram of the right-side view of the present invention; Figure 3 This is a schematic diagram of the connection structure between the door frame and the mounting groove of the present invention; Figure 4 This is a schematic diagram of the connection structure between the door frame, the box body, and the air cushion of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the box body of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the air cylinder of the present invention; Figure 7 This is a schematic diagram of the connection structure between the fixed straight plate, the door body, and the locking seat of the present invention; Figure 8 This is a schematic diagram of the worm gear and worm wheel connection structure of the present invention; Figure 9 This is a schematic diagram of the cross-sectional connection structure between the locking rod and the screw of the present invention; Figure 10 This is a schematic diagram of the cross-sectional connection structure between the air cylinder and the electric heating plate in Embodiment 2 of the present invention.

[0030] In the diagram: 1. Door frame; 2. Door body; 3. Angle seat; 4. Fixed seat; 5. Mounting ring groove; 6. Air cushion; 7. Box body; 8. Hydraulic cylinder; 9. Hinge seat; 10. Connecting rod; 11. Connecting seat; 12. Air cylinder; 13. Piston; 14. Straight rod; 15. Through pipe; 16. Bidirectional motor; 17. Threaded rod; 18. Movable plate; 19. Fixed block; 20. Fixed straight plate; 21. Locking seat; 22. Locking hole; 23. Locking rod; 24. Limiting plate; 25. Worm gear; 26. Worm wheel; 27. Screw; 28. Threaded groove; 29. ​​Electric heating plate. Detailed Implementation

[0031] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Please see Figure 1 - Figure 9 The technical solution of this invention is as follows: An environmentally friendly material delivery vehicle tailgate with adaptive sealing, comprising a door frame 1 and a door body 2 movably disposed inside the door body 2. Two fixed seats 4 are symmetrically fixedly installed at the lower end of the door body 2, and two corner seats 3 are symmetrically fixedly installed at the lower end of the door frame 1. The fixed seats 4 are rotatably connected to the corresponding corner seats 3. The inner wall of the door frame 1 is provided with a mounting groove 5, and an air cushion 6 for sealing between the door frame 1 and the door body 2 is provided in the mounting groove 5. A power mechanism for opening and closing the door body 2 is provided on the door frame 1, and the top surface of the door frame 1 is fixedly installed on a box 7. An air control mechanism for inflating and deflating the air cushion 6 is provided on the box 7, and the air control mechanism is connected to a drive mechanism installed on the inner top surface of the box 7. The box 7 and the door body 2 are connected by a locking mechanism, and the locking mechanism is connected to the drive mechanism through a transmission mechanism.

[0034] The power mechanism includes hydraulic cylinders 8 on the left and right sides of the door frame 1, and the hydraulic cylinders 8 are rotatably mounted on the hinge seat 9. The hinge seat 9 is fixedly mounted on the surface of the door frame 1. The output end of the hydraulic cylinder 8 is rotatably connected to the connecting rod 10, and the inner end of the connecting rod 10 is fixedly mounted with the connecting seat 11. The connecting seat 11 is fixedly mounted on the surface of the door body 2.

[0035] The air control mechanism includes two air cylinders 12 symmetrically and fixedly installed on the bottom surface of the housing 7. The air cylinder 12 is equipped with a piston 13 that is adapted to it. The outer side of the piston 13 is fixedly connected to one end of the straight rod 14. The outer wall of the air cylinder 12 is fixedly connected to one end of the through pipe 15. The through pipe 15 passes through the top of the door frame 1 and is fixedly connected to the mounting ring groove 5 and the air cushion 6. The other end of the through pipe 15 is equipped with a pressure sensor for monitoring the air pressure on the inner wall of the air cushion 6.

[0036] The drive mechanism includes a bidirectional motor 16 fixedly installed on the top surface of the housing 7. Both shaft ends of the bidirectional motor 16 are connected to threaded rods 17 via keys. A movable plate 18 is sleeved on the outside of the threaded rod 17, and the threaded rod 17 is threadedly connected to the movable plate 18. The top surface of the movable plate 18 is laterally slidably connected to the top surface of the housing 7 via a slide rail. The movable plate 18 is fixedly connected to the other end of the straight rod 14. A fixing block 19 is provided on the outside of the movable plate 18, and the fixing block 19 is fixed to the top surface of the housing 7. The threaded rod 17 passes laterally through the fixing block 19, and the threaded rod 17 and the fixing block 19 are rotatably connected via bearings.

[0037] The locking mechanism includes a fixed straight plate 20 fixedly connected to the left and right sides of the upper surface of the door body 2, and a locking seat 21 fixedly connected to the fixed straight plate 20. A locking hole 22 is vertically opened through the locking seat 21, and a locking rod 23 is movably inserted into the locking hole 22. The locking rod 23 vertically penetrates the bottom of the box body 7, and the locking rod 23 is slidably connected to the bottom of the box body 7. A limit plate 24 is fixedly installed on the upper surface of the locking rod 23, and the limit plate 24 is located inside the box body 7.

[0038] The transmission mechanism includes a worm gear 25 coaxially fixedly mounted on the outer end of a threaded rod 17, and the outer end of the worm gear 25 is rotatably connected to the inner wall of the housing 7 via a bearing. A worm wheel 26 is meshed with one side of the worm gear 25, and the worm wheel 26 is fixedly mounted on the surface of a screw 27. The top end of the screw 27 is rotatably connected to the inner top surface of the housing 7 via a bearing. The screw 27 extends into a threaded groove 28 opened on the locking rod 23, and the screw 27 is threadedly connected to the threaded groove 28. The longitudinal axis centerline of the screw 27 is collinear with the longitudinal axis centerline of the locking rod 23.

[0039] Working principle: When the vehicle finishes loading materials and the tailgate needs to be closed, the hydraulic cylinders 8 installed on the hinge seats 9 on both sides of the door frame 1 begin to extend. The cylinder body of the hydraulic cylinder 8 swings around the hinge seat 9. The output end of the hydraulic cylinder 8 applies a pushing force to the door body 2 through the connecting rod 10 and the connecting seat 11. The lower end of the door body 2 rotates and closes by relying on the hinge fulcrum formed by the angle seat 3 and the fixed seat 4, gradually fitting and approaching the inside of the door frame 1 until the end face of the door body 2 fits against the sealing reference surface of the door frame 1.

[0040] After the door 2 is closed, the bidirectional motor 16 installed on the top surface inside the box 7 starts to rotate forward. The output shafts at both ends of the motor drive the two threaded rods 17 on the left and right to rotate together. The fixed block 19 limits the threaded rods 17 radially through the bearing. The threaded rods 17 only rotate in a circle and do not have axial displacement. Due to the limit of the slide rail at the top of the box 7, the movable plate 18, which is threadedly assembled with the threaded rods 17, cannot rotate with the threaded rods 17. It can only move horizontally along the slide rail toward the air cylinder 12.

[0041] The movable plate 18 pulls the straight rod 14 outward, and the straight rod 14 pushes the piston 13 to slide outward in the inner cavity of the air cylinder 12, squeezing the sealed air inside the air cylinder 12. The pressurized gas is sent through the connecting pipe 15 through the top through hole of the door frame 1 into the air cushion 6 built into the mounting ring groove 5. As the gas continues to be filled, the air cushion 6 gradually expands radially, automatically filling the uneven gaps between the door frame 1 and the door body 2 caused by processing tolerances, vehicle body deformation, and wear of parts. It achieves self-adaptive sealing by inflating and tightening, preventing dust and particulate materials inside the compartment from spilling out from the gaps, thus meeting the requirements of environmentally friendly and sealed transportation.

[0042] The pressure sensor of the pipe 15 monitors the internal air pressure of the air cushion 6 in real time. When the air pressure is lost due to bumps, the bidirectional motor 16 rotates forward for a short time to replenish the air. If the air pressure exceeds the limit, the motor will finely adjust to release the pressure, and the sealing pressure will be dynamically constant.

[0043] While the threaded rod 17 continues to rotate, the worm 25, which is coaxially fixed at the outer end of the threaded rod 17, rotates synchronously. The worm 25 meshes with and drives the matching worm wheel 26 to rotate. The worm wheel 26 drives the coaxial screw 27 to rotate vertically inside the housing 7. The lower end of the screw 27 is screwed into the threaded groove 28 opened at the upper end of the locking rod 23. Relying on the threaded transmission, it is converted into vertical displacement, driving the locking rod 23 to move vertically downward along the sliding hole at the bottom of the housing 7. Finally, it passes through the locking hole 22 of the locking seat 21 connected to the fixed straight plate 20 on the door body 2, completing the mechanical locking and fixing between the door body 2 and the housing 7. The limiting plate 24 at the upper part of the locking rod 23 is stuck in the inner cavity of the housing 7, limiting the maximum downward distance of the locking rod 23, preventing the locking rod 23 from falling off completely, and ensuring the safe operation of the locking structure.

[0044] When the tailgate needs to be opened for unloading, the bidirectional motor 16 switches to reverse rotation, the threaded rod 17 drives the movable plate 18 to slide inward, the movable plate 18 pulls the piston 13 to reset and move through the straight rod 14, the internal space of the air cylinder 12 increases to form a negative pressure, the air stored in the air cushion 6 flows back to the air cylinder 12 along the through pipe 15, the air cushion 6 loses air and contracts, releasing the squeezing seal between the door body 2 and the door frame 1;

[0045] At the same time, the worm gear 25 and worm wheel 26, which rotate in the opposite direction, drive the screw 27 to rotate in the opposite direction. The screw 27 rotates upward out of the threaded groove 28, pulling the locking rod 23 upward as a whole. The locking rod 23 is completely pulled out of the locking hole 22, and the mechanical lock of the door 2 is released. After the locking and sealing are completely released, the hydraulic cylinder 8 retracts and pulls the connecting rod 10 and the connecting seat 11 in the opposite direction. The door 2 is pushed outward around the hinge fulcrum of the corner seat 3 and the fixed seat 4, and the tail door is fully opened, so that the unloading operation can be carried out.

[0046] Example 2

[0047] Specifically, such as Figure 10As shown, the difference between this embodiment and Embodiment 1 is that an electric heating plate 29 is fixedly installed on the inner wall of the outer side of the air cylinder 12, and a temperature sensor is installed on one side of the electric heating plate 29.

[0048] With the above structural design, the electric heating plate 29 installed on the inner wall of the air cylinder 12 will be energized and heated when operating in low-temperature environments. The temperature sensor will monitor the heating temperature in real time to preheat the air inside the air cylinder 12, prevent the air from contracting due to low temperature and causing insufficient inflation of the air cushion 6, avoid the problem of insufficient expansion of the air cushion 6 causing sealing gaps and sealing failure, and ensure the stable sealing performance of the air cushion 6 in low-temperature environments.

[0049] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adaptive sealing environmentally friendly material delivery vehicle tailgate, comprising a door frame (1) and a door body (2) movable inside it, characterized in that: Two fixed seats (4) are symmetrically fixedly installed at the lower end of the door body (2), and two corner seats (3) are symmetrically fixedly installed at the lower end of the door frame (1). The fixed seats (4) are rotatably connected to the corresponding corner seats (3). The inner wall of the door frame (1) is provided with a mounting groove (5), and an air cushion (6) for sealing between the door frame (1) and the door body (2) is provided in the mounting groove (5). A power mechanism for opening and closing the door body (2) is provided on the door frame (1), and the top surface of the door frame (1) is fixedly installed on the box body (7). An air control mechanism for inflating and deflating the air cushion (6) is provided on the box body (7), and the air control mechanism is connected to a drive mechanism installed on the top surface of the box body (7). The box body (7) and the door body (2) are connected by a locking mechanism, and the locking mechanism is connected to the drive mechanism through a transmission mechanism.

2. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 1, characterized in that, The power mechanism includes hydraulic cylinders (8) on the left and right sides of the door frame (1), and the hydraulic cylinders (8) are rotatably mounted on the hinge seat (9), and the hinge seat (9) is fixedly mounted on the surface of the door frame (1). The output end of the hydraulic cylinder (8) is rotatably connected to the connecting rod (10), and the inner end of the connecting rod (10) is fixedly mounted with the connecting seat (11), and the connecting seat (11) is fixedly mounted on the surface of the door body (2).

3. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 1, characterized in that, The air control mechanism includes two air cylinders (12) symmetrically fixedly installed on the bottom surface of the box (7), and the air cylinder (12) is provided with a piston (13) that is compatible with it. The outer side of the piston (13) is fixedly connected to one end of the straight rod (14). The outer side wall of the air cylinder (12) is fixedly connected to one end of the through pipe (15), and the through pipe (15) passes through the top of the door frame (1) and is fixedly connected to the mounting ring groove (5) and the air cushion (6).

4. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 3, characterized in that, The drive mechanism includes a bidirectional motor (16) fixedly installed on the top surface of the housing (7), and both shaft ends of the bidirectional motor (16) are connected to threaded rods (17) by keys. A movable plate (18) is sleeved on the outside of the threaded rod (17), and the threaded rod (17) is threadedly connected to the movable plate (18). The top surface of the movable plate (18) is slidably connected to the top surface of the housing (7) by a slide rail, and the movable plate (18) is fixedly connected to the other end of the straight rod (14).

5. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 4, characterized in that, A fixing block (19) is provided on the outer side of the movable plate (18), and the fixing block (19) is fixed to the inner top surface of the box (7). The threaded rod (17) passes through the fixing block (19) laterally, and the threaded rod (17) and the fixing block (19) are rotatably connected by a bearing.

6. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 4, characterized in that, The locking mechanism includes a fixed straight plate (20) fixedly connected to the left and right sides of the upper surface of the door body (2), and a locking seat (21) fixedly connected to the fixed straight plate (20). A locking hole (22) is vertically opened on the locking seat (21), and a locking rod (23) is movably inserted into the locking hole (22). The locking rod (23) vertically penetrates the bottom of the box body (7), and the locking rod (23) is slidably connected to the bottom of the box body (7).

7. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 6, characterized in that, A limiting plate (24) is fixedly installed on the upper surface of the locking rod (23), and the limiting plate (24) is located inside the box (7).

8. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 6, characterized in that, The transmission mechanism includes a worm gear (25) coaxially fixedly installed on the outer end of a threaded rod (17), and the outer end of the worm gear (25) is rotatably connected to the inner wall of the housing (7) through a bearing. A worm wheel (26) is meshed with one side of the worm gear (25), and the worm wheel (26) is fixedly installed on the surface of the screw (27). The top end of the screw (27) is rotatably connected to the inner top surface of the housing (7) through a bearing, and the screw (27) extends into the threaded groove (28) opened on the locking rod (23). The screw (27) is threadedly connected to the threaded groove (28).

9. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 8, characterized in that, The longitudinal centerline of the screw (27) is collinear with the longitudinal centerline of the locking rod (23).

10. The adaptive sealing environmentally friendly material delivery vehicle tailgate according to claim 3, characterized in that, An electric heating plate (29) is fixedly installed on the inner wall of the outer side of the air cylinder (12).

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