Sealing device of garbage truck

Abstract

The invention relates to the technical field of garbage transport vehicles, in particular to a sealing device of a garbage transport vehicle, which comprises a garbage truck box body and a cover plate, a garbage inlet is formed in the upper surface of the garbage truck box body, an axis plate is fixed on the outer ring surface of the cover plate, and a power structure is arranged on one side, far away from the cover plate, of the axis plate; the power structure is connected with the garbage truck box body and connected with the end, away from the axis plate, of the power structure, a double-cavity arc plate is arranged on the side, away from the cover plate, of the power structure, and a partition plate is fixedly inserted into the double-cavity arc plate. The movable blocking column can be pushed by airflow to move downwards to be inserted into the garbage inlet, at the moment, the expansion ring bag A is located in the ring groove A, the expansion ring bag A does not make relative contact and friction with the garbage inlet, it is guaranteed that after the movable blocking column enters the garbage inlet, the expansion ring bag A is expanded and sealed, abrasion to the expansion ring bag A during movement is effectively reduced, and the service life of the movable blocking column is prolonged. And the service life of the expansion ring bag A is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of garbage transport vehicles, and in particular to a sealing device of a garbage transport vehicle. Background Art

[0002] Garbage trucks are mainly used for urban and rural municipal sanitation and large factories and mines to transport various types of garbage, especially for transporting residential garbage. The amount of garbage generated every day in urban and rural areas is very large, causing serious pollution, and timely disposal of garbage is a major problem. Garbage trucks can help sanitation workers clean up garbage in a timely manner, greatly reducing the workload of sanitation workers and alleviating the problem of urban garbage.

[0003] Chinese patent announcement number CN207030126U discloses a garbage transport vehicle, including a vehicle body and a box body for loading garbage. A first hydraulic cylinder for pushing the garbage toward the front of the vehicle and compressing the garbage is arranged at the rear of the box body, and the output shaft of the first hydraulic cylinder is fixedly connected with a push plate that fits the inner wall of the box body. A feed inlet for conveniently putting in garbage is arranged near the rear position on the upper end face of the box body, and a discharge port for discharging garbage is arranged on one side wall of the box body. The discharge port cover is provided with a cover plate, and the lower end face of the cover plate is hinged to the box body, and the cover plate can be rotated to abut against the ground. A second hydraulic cylinder for pushing the garbage away from the box body is arranged on the side wall of the box body away from the discharge port, and the output shaft of the second hydraulic cylinder is fixedly connected with a pressure plate, and the pressure plate is arranged in the inner cavity of the box body.

[0004] The above-mentioned related technologies have the following defects: in order to prevent the internal garbage and garbage odor from escaping during garbage transportation, the feed port will be blocked. The existing technology generally blocks it through a cover plate, which will result in poor sealing, so a deformable sealing strip will be further installed at the connection between the cover plate and the feed port, but the sealing strip is directly fixed at the connection between the cover plate and the feed port, which causes the sealing strip to slide relative to the inner wall of the feed port when the cover plate is sealed, causing the sealing strip to gradually wear out with the increase of usage time, so that the sealing effect of the sealing strip is gradually reduced. Summary of the invention

[0005] In order to reduce the wear of the soft sealing structure when sealing the feed inlet, the present invention provides a sealing device for a garbage transport vehicle.

[0006] The sealing device of a garbage transport truck provided by the present invention adopts the following technical scheme: it comprises a garbage truck box body and a cover plate, wherein the upper surface of the garbage truck box body is provided with a garbage inlet, an axis plate is fixed to the outer ring surface of the cover plate, a power structure is arranged on the side of the axis plate away from the cover plate, the power structure is connected to the garbage truck box body, the power structure is connected to one end away from the axis plate, a double-cavity arc plate is arranged on the side of the power structure away from the cover plate, a partition plate is fixedly inserted inside the double-cavity arc plate, and the inner ring surface of the double-cavity arc plate and located on both sides of the partition plate are A vent hole is opened, an air disc is arranged at the axis of the double-cavity arc plate, a round tube is fixedly connected to the outer annular surface of the air disc and one side close to the double-cavity arc plate, the other end of the round tube is in sliding contact with the inner annular surface of the double-cavity arc plate, a vertical pipe is fixedly connected to the upper surface of the air disc, a bend is slidably inserted at the upper end of the vertical pipe, a vent valve is fixedly connected to the outer surface of the bend, one end of the bend located inside the vertical pipe is blocked, a connecting hole is opened on the circumferential side of the blocked end of the bend, the other end of the bend is fixedly penetrated through the upper surface of the cover plate, and a A fixed frame, a vertical pipe is rotatably connected to the fixed frame, the fixed frame is fixed to the upper surface of the double-cavity arc plate, a main friction wheel is fixed to the outer surface of the vertical pipe, a secondary friction wheel is provided on one side of the main friction wheel, the secondary friction wheel is connected to the output end of the power structure, an air pump is provided on the side of the double-cavity arc plate away from the air disk, the air outlet end and the air suction end of the air pump are fixedly plugged into the outer ring surface of the double-cavity arc plate, the air outlet end and the air suction end of the air pump are respectively located on both sides of the partition, a movable blocking column is slidably plugged into the bottom surface of the cover plate, and an end frame is slidably sleeved on the lower end of the movable blocking column, The end frame is fixed to the bottom surface of the cover plate, the lower end of the movable blocking column has a shape and size that matches the garbage inlet, the outer ring surface of the lower end of the movable blocking column is provided with an annular groove A, the interior of the movable blocking column is hollow, an expansion ring bag A is fixed inside the annular groove A, the inner ring surface of the annular groove A is provided with a ventilation groove A connected to the interior of the movable blocking column, the upper surface of the movable blocking column is fixedly connected with a center end tube, the upper end of the center end tube slides through the inner top wall of the cover plate, an opening is provided at one end of the center end tube located above the cover plate, and the movable blocking column is located below the bent pipe.

[0007] Optionally, a ring groove B is provided on the bottom surface of the movable blocking column, and a ventilation groove B is provided on the inner top wall of the ring groove B and is connected to the interior of the movable blocking column. An expansion ring bag B is fixed inside the ring groove B, and four movable support plates are arranged inside the garbage truck body and below the movable blocking column. The four movable support plates form a ring structure, and a pressure telescopic rod is fixed on the side of the movable support plate away from the axis of the garbage truck body, and the other end of the pressure telescopic rod is fixed to the inner wall of the garbage truck body, and a bent rod is fixed on the side of the movable support plate away from the axis of the garbage truck body, and the other end of the bent rod slides through the inner wall of the garbage truck body.

[0008] Optionally, the power structure includes a motor, a driving gear and a driven gear, the driving gear is fixed to the output end of the motor, the motor is fixed to the garbage truck body, the secondary friction wheel is fixedly sleeved on the output end of the motor, a threaded shaft is threaded through the upper surface of one end of the axis plate close to the motor, the lower end of the threaded shaft is rotatably inserted into the upper surface of the garbage truck body, the driven gear is fixedly sleeved on the upper end of the threaded shaft, the driving gear is meshed with the driven gear, a baffle rod is provided on the rear side of the axis plate, the lower end of the baffle rod is fixed to the garbage truck body, a torsion spring is fixed on the upper surface of the axis plate, the upper end of the torsion spring is fixed to the bottom surface of the driven gear, the threaded shaft is located on the inner ring side of the torsion spring, and the driving gear is located above the secondary friction wheel.

[0009] Optionally, a distance cylinder is provided on the inner ring side of the torsion spring, the lower end of the distance cylinder contacts the upper surface of the axis plate, and the upper end of the distance cylinder is fixed to the bottom surface of the driven gear.

[0010] Optionally, the end of the bending rod located outside the garbage truck body is bent upward, and the upward bent end of the bending rod is slidably sleeved with a variable diameter arc frame. A friction ring is arranged above the garbage truck body, and the cover plate is located on the inner ring side of the friction ring. A plurality of limit plates are arranged in contact with the outer ring surface of the friction ring. The lower end of the limit plate is fixed to the garbage truck body, the bottom surface of the friction ring is fixed to the upper surface of the variable diameter arc frame, and a friction disk is fixedly sleeved at the output end of the motor and located below the secondary friction wheel, and the friction disk is in contact with the outer ring surface of the friction ring.

[0011] Optionally, the two ends of the variable diameter arc frame are coaxially arranged arc structures with different radii, the axes of the arc structures at both ends of the variable diameter arc frame are coaxially arranged with the central axis of the cover plate, and the four variable diameter arc frames are evenly distributed in a circular array around the central axis of the cover plate.

[0012] Optionally, baffles are provided on the sides of the two vents that are away from each other, the baffles are fixed to the inner annular surface of the double-cavity arc plate, and the round tube is located between the two baffles.

[0013] Optionally, one end of the central end tube located above the cover plate is in contact with a resistance plate, an elastic telescopic rod is fixed to a side of the resistance plate away from the central end tube, and the other end of the elastic telescopic rod is fixed to the upper surface of the cover plate.

[0014] Optionally, pressure springs are fixed at the four corners of the upper surface of the end frame and inside the cover plate, and the upper ends of the pressure springs are fixed to the movable blocking columns.

[0015] In summary, the present invention includes the following beneficial technical effects: 1. The present invention arranges a movable blocking column, an annular groove A, a venting groove A and an expansion ring bag A to control the cover plate to rotate to the top of the garbage inlet, and at the same time drives the circular tube to communicate with a vent hole of the double-cavity arc plate. After the cover plate rotates to the top of the garbage inlet, it moves downward. When the cover plate contacts the upper surface of the garbage truck body, it drives the connecting hole of the blocking end of the bent pipe to enter the air disk. The air outlet of the air pump inflates air to the top of the movable blocking column inside the cover plate through the vent hole, the circular tube, the air disk, the connecting hole and the bent pipe. The airflow first pushes the movable blocking column to move downward and insert into the garbage inlet. At this time, the expansion ring bag A is in Inside the annular groove A, the expansion ring bag A does not have relative contact and friction with the garbage inlet. When the upper end of the movable blocking column contacts the end frame, the opening on the surface of the center end tube enters the inside of the cover plate, and the airflow enters the movable blocking column through the opening, and then enters the expansion ring bag A through the ventilation groove A. The expansion ring bag A gradually expands under gas filling and fully contacts the garbage inlet, ensuring that after the movable blocking column enters the garbage inlet, the expansion ring bag A expands and seals again. When the movable blocking column moves, the expansion ring bag A is located in the annular groove A, which effectively reduces the wear on the expansion ring bag A during movement and increases the service life of the expansion ring bag A.

[0016] 2. The present invention arranges an expansion ring bag B, a movable support plate, a bent rod and a variable diameter arc frame. When the friction disk rotates, the variable diameter arc frame is driven to rotate through friction contact with the friction ring. The bent rod pushes the movable support plate close to the axis of the garbage truck body by moving in the variable diameter arc frame, so that the four movable support plates are close to each other to form a square frame structure located below the movable blocking column. When the upper end of the movable blocking column contacts the end frame, the lower end of the movable blocking column contacts the upper surface of the movable support frame. Then, after the gas enters the expansion ring bag B, the expansion ring bag B expands and contacts the movable support frame in a sealed manner, thereby further increasing the degree of sealing.

[0017] 3. The present invention sets a main friction wheel, a secondary friction wheel, a distance cylinder, a stop rod, a threaded shaft and a driven gear. The torsion spring drives the axis plate to rotate and mesh with the threaded shaft to have an upward movement tendency. The distance cylinder limits the maximum distance that the torsion spring drives the axis plate to move upward. When the motor is started, the driving gear drives the threaded shaft to rotate by meshing with the driven gear. The driven gear first drives the axis plate to rotate synchronously through the torsion spring. When the axis plate contacts the stop rod, the axis plate drives the cover plate to move to the top of the garbage inlet. At the same time, the secondary friction wheel drives the air disk and the circular tube to rotate and connect with the air vent of the double-cavity arc plate through friction contact with the main friction wheel. When the driven gear continues to rotate, it drives the torsion spring to twist and store force. The axis plate rotates and meshes with the threaded shaft, driving the axis plate and the cover plate to move downward. When the motor rotates, the cover plate and the circular tube can be controlled to move to corresponding positions through transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2is a schematic diagram of a top view structure in an embodiment of the present invention; Figure 3 2 is a schematic diagram of the structure of the connection between the friction ring and the variable diameter arc frame in an embodiment of the present invention; Figure 4 is a bottom view schematic diagram of a part of the structure in an embodiment of the present invention; Figure 5 2 is a schematic diagram of the structure of the connection between the bent rod and the movable support plate in an embodiment of the present invention; Figure 6 2 is a schematic diagram of the structure of the connection between the partition plate and the double-cavity arc plate in an embodiment of the present invention; Figure 7 2 is a schematic diagram of the structure of the connection between the cover plate and the movable blocking column in an embodiment of the present invention; Figure 8 In the embodiment of the present invention Figure 7 A schematic diagram of the structure enlargement in the middle; Fig. 9 In the embodiment of the present invention Figure 7 Enlarged schematic diagram of the structure at point B in the middle.

[0019] Figure numerals: 1, garbage truck body; 2, cover plate; 3, axis plate; 4, power structure; 41, motor; 42, driving gear; 43, driven gear; 44, threaded shaft; 45, stop rod; 46, torsion spring; 461, distance cylinder; 5, partition; 6, double-cavity arc plate; 7, gas disc; 8, round pipe; 9, elbow; 10, vent; 11, vertical pipe; 12, fixed frame; 13, connecting hole; 14, main friction wheel; 15, auxiliary friction wheel; 16, air pump; 17, active Dynamic blocking column; 18. Ring groove A; 19. Expansion ring bag A; 20. Ventilation groove A; 21. Center end tube; 22. Opening; 23. Ring groove B; 24. Ventilation groove B; 25. Expansion ring bag B; 26. Movable support plate; 27. Pressure telescopic rod; 28. Bending rod; 29. ​​Variable diameter arc frame; 30. Friction ring; 31. Limiting plate; 32. Friction disk; 33. Garbage inlet; 34. End frame; 35. Baffle; 36. Resistance plate; 37. Elastic telescopic rod; 38. Pressure spring. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-9 The present invention is described in further detail.

[0021] The embodiment of the present invention discloses a sealing device for a garbage transport vehicle. Figure 1As shown, it includes a garbage truck box body 1 and a cover plate 2, a garbage inlet 33 is provided on the upper surface of the garbage truck box body 1, an axis plate 3 is fixed to the outer ring surface of the cover plate 2, a power structure 4 is provided on the side of the axis plate 3 away from the cover plate 2, the power structure 4 is connected to the garbage truck box body 1, the power structure 4 is connected to the axis plate 3 away from one end, a double-cavity arc plate 6 is provided on the side of the power structure 4 away from the cover plate 2, a partition plate 5 is fixedly inserted inside the double-cavity arc plate 6, and ventilation holes are provided on the inner ring surface of the double-cavity arc plate 6 and on both sides of the partition plate 5 Hole 10, an air disk 7 is arranged at the axis of the double-cavity arc plate 6, a round tube 8 is fixedly connected to the outer annular surface of the air disk 7 and one side close to the double-cavity arc plate 6, the other end of the round tube 8 is in sliding contact with the inner annular surface of the double-cavity arc plate 6, a baffle 35 is arranged on the side away from each other of the two air holes 10, the baffle 35 is fixed to the inner annular surface of the double-cavity arc plate 6, the round tube 8 is located between the two baffles 35, the baffle 35 limits the moving range of the round tube 8, and the round tube 8 is connected with the two air holes 10 respectively when contacting the two baffles 35 respectively.

[0022] The upper surface of the gas disk 7 is fixedly connected with a vertical pipe 11, and the upper end of the vertical pipe 11 is slidably plugged with a bent pipe 9. The outer surface of the bent pipe 9 is fixedly connected with a relief valve, which can relieve the excess positive and negative pressure inside the bent pipe 9. The end of the bent pipe 9 located inside the vertical pipe 11 is blocked, and a connecting hole 13 is opened on the circumferential side of the blocked end of the bent pipe 9. When the bent pipe 9 is located in the vertical pipe 11, the vertical pipe 11 blocks the connecting hole 13. When the bottom surface of the cover plate 2 contacts the upper surface of the garbage truck box 1, the connection of the bent pipe 9 The hole 13 enters the gas disk 7, so that the inside of the bent pipe 9 is connected with the inside of the gas disk 7. The other end of the bent pipe 9 is fixed to penetrate the upper surface of the cover plate 2. The outer surface of the garbage truck box 1 is fixed with a fixing frame 12. The vertical pipe 11 is rotatably connected with the fixing frame 12. The fixing frame 12 is fixed to the upper surface of the double-cavity arc plate 6. The outer surface of the vertical pipe 11 is fixed with a main friction wheel 14. One side of the main friction wheel 14 is contacted with a secondary friction wheel 15. The secondary friction wheel 15 is connected to the output end of the power structure 4. The double-cavity arc plate 6 is away from the side of the gas disk 7. An air pump 16 is provided, and the air outlet and the air suction end of the air pump 16 are fixedly plugged into the outer annular surface of the double-cavity arc plate 6. The air outlet and the air suction end of the air pump 16 are respectively located on both sides of the partition 5. A one-way valve is installed inside the air outlet and the air suction end of the air pump 16, so that the air outlet of the air pump 16 can only exhaust air outwards, and the air suction end of the air pump 16 can only inhale air inwards. When the cover plate 2 rotates to the top of the garbage inlet 33, the auxiliary friction wheel 15 drives the vertical pipe 11 and the circular pipe 8 to rotate through friction contact with the main friction wheel 14, so that the circular pipe 8 It is rotated to be connected with the vent hole 10 for outlet of the double-cavity arc plate 6, and a movable blocking column 17 is slidably inserted into the bottom surface of the cover plate 2. The lower end of the movable blocking column 17 is slidably sleeved with an end frame 34, and the end frame 34 is fixed to the bottom surface of the cover plate 2. Pressure springs 38 are fixed at the four corners of the upper surface of the end frame 34 and located inside the cover plate 2. The upper end of the pressure spring 38 is fixed to the movable blocking column 17. The pressure spring 38 has a tendency to push the movable blocking column 17 to move upward, and the lower end of the movable blocking column 17 has a garbage inlet 33 that is adapted in shape and size.

[0023] An annular groove A18 is provided on the outer annular surface of the lower end of the movable blocking column 17. The interior of the movable blocking column 17 is hollow. An expansion ring bag A19 is fixed inside the annular groove A18. When no gas is filled into the expansion ring bag A19, the expansion ring bag A19 shrinks inside the annular groove A18 to ensure that the expansion ring bag A19 will not be subjected to friction when the movable blocking column 17 is moving. A ventilation groove A20 connected to the interior of the movable blocking column 17 is provided on the inner annular surface of the annular groove A18.

[0024] The upper surface of the movable blocking column 17 is fixedly connected to a center end tube 21, and the upper end of the center end tube 21 slides through the inner top wall of the cover plate 2. An opening 22 is provided at one end of the center end tube 21 located above the cover plate 2. When the upper end of the movable blocking column 17 contacts the end frame 34, the opening 22 enters the cover plate 2, and the gas can enter the movable blocking column 17 to expand the expansion ring bag A19. The end of the center end tube 21 located above the cover plate 2 contacts a resistance plate 36, and an elastic telescopic rod 37 is fixed on the side of the resistance plate 36 away from the center end tube 21. The other end of the elastic telescopic rod 37 is fixed to the upper surface of the cover plate 2. The resistance plate 36 ensures that when air is inhaled from the movable blocking column 17, the expansion ring bag A19 first shrinks into the annular groove A18, and the movable blocking column 17 then moves upward, effectively preventing the expansion ring bag A19 from moving in the expanded state. The movable blocking column 17 is located below the bent pipe 9.

[0025] An annular groove B23 is provided on the bottom surface of the movable blocking column 17, and an inner top wall of the annular groove B23 is provided with a ventilation groove B24 connected to the interior of the movable blocking column 17. An expansion ring bag B25 is fixed inside the annular groove B23. Four movable support plates 26 are arranged inside the garbage truck body 1 and below the movable blocking column 17. The four movable support plates 26 form an annular structure. A pressure telescopic rod 27 is fixed on the side of the movable support plate 26 away from the axis of the garbage truck body 1, and the other end of the pressure telescopic rod 27 is fixed to the inner wall of the garbage truck body 1. A bent rod 28 is fixed on the side of the movable support plate 26 away from the axis of the garbage truck body 1, and the other end of the bent rod 28 slides through the inner wall of the garbage truck body 1.

[0026] The power structure 4 includes a motor 41, a driving gear 42 and a driven gear 43. The driving gear 42 is fixed to the output end of the motor 41, the motor 41 is fixed to the garbage truck body 1, the auxiliary friction wheel 15 is fixedly sleeved on the output end of the motor 41, and a threaded shaft 44 is threaded through the upper surface of the end of the axis plate 3 close to the motor 41. The lower end of the threaded shaft 44 is rotatably inserted into the upper surface of the garbage truck body 1, and the driven gear 43 is fixedly sleeved on the upper end of the threaded shaft 44. The driving gear 42 is meshed with the driven gear 43. A stopper 45 is provided on the rear side of the axis plate 3, and the lower end of the stopper 45 is connected to the garbage truck body 1. Fixed, a torsion spring 46 is fixed on the upper surface of the axis plate 3, and the upper end of the torsion spring 46 is fixed to the bottom surface of the driven gear 43. The torsion spring 46 has a tendency to move upward by driving the axis plate 3 to rotate and engage with the threaded shaft 44. The threaded shaft 44 is located on the inner ring side of the torsion spring 46, and a spacing cylinder 461 is provided on the inner ring side of the torsion spring 46. The lower end of the spacing cylinder 461 contacts the upper surface of the axis plate 3, and the upper end of the spacing cylinder 461 is fixed to the bottom surface of the driven gear 43. The spacing cylinder 461 limits the maximum distance that the torsion spring 46 drives the axis plate 3 to move upward, and the driving gear 42 is located above the secondary friction wheel 15.

[0027] One end of the bending rod 28 located outside the garbage truck body 1 is bent upward, and the end of the bending rod 28 that is bent upward is slidably sleeved with a variable diameter arc frame 29. A friction ring 30 is arranged above the garbage truck body 1, and the cover plate 2 is located on the inner ring side of the friction ring 30. The outer ring surface of the friction ring 30 is contacted with a plurality of limit plates 31, and the lower end of the limit plate 31 is fixed to the garbage truck body 1, and the bottom surface of the friction ring 30 is fixed to the upper surface of the variable diameter arc frame 29. The two ends of the variable diameter arc frame 29 are coaxially arranged arc structures with different radii. The arc structure axes at the two ends of the variable diameter arc frame 29 are coaxially arranged with the central axis of the cover plate 2. The four variable diameter arc frames 29 are arranged in a circular arc structure with different radii. The central axis of the cover plate 2 is evenly distributed in a circular array. The output end of the motor 41 is fixedly sleeved with a friction disk 32 located below the auxiliary friction wheel 15. The friction disk 32 contacts the outer ring surface of the friction ring 30. The upper end of the bent rod 28 can drive the movable support plate 26 to move by moving to the two ends of the variable diameter arc frame 29. When the bent rod 28 moves to the small diameter end of the variable diameter arc frame 29, the movable support plate 26 moves to the bottom of the expansion ring bag B25. The arc-shaped structures at both ends of the variable diameter arc frame 29 can delay the driving of the bent rod 28. When the bent rod 28 moves at the large diameter end and the small diameter end of the variable diameter arc frame 29 respectively, it will not drive the movable support plate 26 to move.

[0028] The working principle is as follows: when the motor 41 is started, the driving gear 42 drives the threaded shaft 44 to rotate by meshing with the driven gear 43. The driven gear 43 first drives the axis plate 3 to rotate synchronously through the torsion spring 46. When the axis plate 3 contacts the baffle rod 45, the axis plate 3 drives the cover plate 2 to move to the top of the garbage inlet 33. At the same time, the secondary friction wheel 15 drives the air disk 7 and the round tube 8 to rotate and communicate with the air vent 10 of the double-cavity arc plate 6 through friction contact with the main friction wheel 14. When the secondary friction wheel 15 continues to rotate, the round tube 8 stops rotating under the obstruction of the baffle 35, and the secondary friction wheel 15 rotates relative to the main friction wheel 14. When the driven gear 43 continues to rotate, the torsion spring 46 is driven to twist and store force, and the axis plate 3 rotates relative to the threaded shaft 44, driving the axis plate 3 and the cover plate 2 to move downward. When the cover plate 2 is in contact with the garbage truck box body 1 When the upper surface is in contact, the connecting hole 13 at the blocked end of the curved tube 9 is driven into the air disk 7, and the air outlet of the air pump 16 is inflated to the top of the movable blocking column 17 inside the cover plate 2 through the vent hole 10, the circular tube 8, the air disk 7, the connecting hole 13 and the curved tube 9. The airflow first pushes the movable blocking column 17 to move downward and insert into the garbage inlet 33. When the upper end of the movable blocking column 17 contacts the end frame 34, the opening 22 on the surface of the center end tube 21 enters the cover plate 2, and the airflow enters the movable blocking column 17 through the opening 22, and then enters the expansion ring bag A19 through the ventilation groove A20. The expansion ring bag A19 gradually expands under gas filling and fully contacts the garbage inlet 33, ensuring that after the movable blocking column 17 enters the garbage inlet 33, the expansion ring bag A19 expands again to seal between the garbage inlet 33 and the movable blocking column 17.

[0029] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing device for a garbage truck, comprising a garbage truck body (1) and a cover plate (2), characterized in that: The upper surface of the garbage truck box (1) is provided with a garbage inlet (33); an axis plate (3) is fixed to the outer annular surface of the cover plate (2); a power structure (4) is provided on the side of the axis plate (3) away from the cover plate (2); the power structure (4) is connected to the garbage truck box (1); the power structure (4) is connected to one end of the axis plate (3) away from the cover plate (2); a double-cavity arc plate (6) is provided on the side of the power structure (4) away from the cover plate (2); a partition plate (5) is fixedly inserted inside the double-cavity arc plate (6); ventilation holes (10) are provided on the inner annular surface of the double-cavity arc plate (6) and on both sides of the partition plate (5); an air disk (7) is provided at the axis of the double-cavity arc plate (6); and the outer annular surface of the air disk (7) and near the double-cavity arc plate (6) are provided with a gas disk (7). A circular tube (8) is fixedly connected to one side of the arc plate (6), and the other end of the circular tube (8) is in sliding contact with the inner annular surface of the double-cavity arc plate (6). A vertical tube (11) is fixedly connected to the upper surface of the gas disc (7), and a curved tube (9) is slidably inserted into the upper end of the vertical tube (11). The outer surface of the curved tube (9) is fixedly connected to an air release valve. One end of the curved tube (9) located inside the vertical tube (11) is in a blocked shape, and a connecting hole (13) is provided on the circumferential side of the blocked end of the curved tube (9). The other end of the curved tube (9) is fixedly penetrated through the upper surface of the cover plate (2). A fixing frame (12) is fixedly connected to the outer surface of the garbage truck box (1), and the vertical tube (11) is rotatably connected to the fixing frame (12). The fixing frame (12) is connected to the double-cavity arc plate ( The upper surface of the vertical pipe (11) is fixed, a main friction wheel (14) is fixed on the outer surface of the vertical pipe (11), a secondary friction wheel (15) is provided on one side of the main friction wheel (14), and the secondary friction wheel (15) is connected to the output end of the power structure (4). An air pump (16) is provided on the side of the double-cavity arc plate (6) away from the air disk (7), and the air outlet end and the air suction end of the air pump (16) are fixedly plugged into the outer ring surface of the double-cavity arc plate (6), and the air outlet end and the air suction end of the air pump (16) are respectively located on both sides of the partition plate (5), and a movable blocking column (17) is slidably plugged into the bottom surface of the cover plate (2), and the lower end of the movable blocking column (17) is slidably sleeved with an end frame (34), and the end frame (34) is fixed to the bottom surface of the cover plate (2). The lower end of the movable blocking column (17) is provided with a garbage inlet (33) of a shape and size that matches the shape of the garbage inlet (33). The outer ring surface of the lower end of the movable blocking column (17) is provided with a ring groove A (18). The interior of the movable blocking column (17) is in a cavity shape. An expansion ring bag A (19) is fixed inside the ring groove A (18). The inner ring surface of the ring groove A (18) is provided with a ventilation groove A (20) that is connected to the interior of the movable blocking column (17). The upper surface of the movable blocking column (17) is fixedly connected with a center end tube (21). The upper end of the center end tube (21) slides through the inner top wall of the cover plate (2). An opening (22) is provided at one end of the center end tube (21) located above the cover plate (2). The movable blocking column (17) is located below the bent pipe (9).

2. A sealing device for a garbage transport vehicle according to claim 1, characterized in that: The bottom surface of the movable blocking column (17) is provided with an annular groove B (23), the inner top wall of the annular groove B (23) is provided with a ventilation groove B (24) which is connected to the inside of the movable blocking column (17), and an expansion ring bag B (25) is fixed inside the annular groove B (23). Four movable support plates (26) are arranged inside the garbage truck body (1) and below the movable blocking column (17). The four movable support plates (26) form an annular structure. A pressure telescopic rod (27) is fixed to the side of the movable support plate (26) away from the axis of the garbage truck body (1), and the other end of the pressure telescopic rod (27) is fixed to the inner wall of the garbage truck body (1). A bent rod (28) is fixed to the side of the movable support plate (26) away from the axis of the garbage truck body (1), and the other end of the bent rod (28) slides through the inner wall of the garbage truck body (1).

3. The sealing device of a garbage transport vehicle according to claim 2, characterized in that: The power structure (4) comprises a motor (41), a driving gear (42) and a driven gear (43); the driving gear (42) is fixed to the output end of the motor (41); the motor (41) is fixed to the garbage truck body (1); the auxiliary friction wheel (15) is fixedly sleeved on the output end of the motor (41); a threaded shaft (44) is threadedly penetrated through the upper surface of one end of the axis plate (3) close to the motor (41); the lower end of the threaded shaft (44) is rotatably inserted into the upper surface of the garbage truck body (1); and the driven gear (42) is fixedly sleeved on the output end of the motor (41); (43) is fixedly sleeved on the upper end of the threaded shaft (44), the driving gear (42) is meshed with the driven gear (43), a stop rod (45) is arranged on the rear side of the axis plate (3), the lower end of the stop rod (45) is fixed to the garbage truck box (1), a torsion spring (46) is fixed on the upper surface of the axis plate (3), the upper end of the torsion spring (46) is fixed to the bottom surface of the driven gear (43), the threaded shaft (44) is located on the inner ring side of the torsion spring (46), and the driving gear (42) is located above the secondary friction wheel (15).

4. The sealing device of a garbage transport vehicle according to claim 3, characterized in that: A distance cylinder (461) is provided on the inner ring side of the torsion spring (46), the lower end of the distance cylinder (461) contacts the upper surface of the axis plate (3), and the upper end of the distance cylinder (461) is fixed to the bottom surface of the driven gear (43).

5. The sealing device of a garbage transport vehicle according to claim 3, characterized in that: One end of the bending rod (28) located outside the garbage truck body (1) is bent upward, and the end of the bending rod (28) that is bent upward is slidably sleeved with a variable diameter arc frame (29). A friction ring (30) is arranged above the garbage truck body (1), and the cover plate (2) is located on the inner ring side of the friction ring (30). The outer ring surface of the friction ring (30) is contacted with a plurality of limit plates (31). The lower end of the limit plate (31) is fixed to the garbage truck body (1), and the bottom surface of the friction ring (30) is fixed to the upper surface of the variable diameter arc frame (29). A friction disk (32) is fixedly sleeved at the output end of the motor (41) and located below the auxiliary friction wheel (15), and the friction disk (32) is in contact with the outer ring surface of the friction ring (30).

6. The sealing device of a garbage transport vehicle according to claim 5, characterized in that: The two ends of the variable diameter arc frame (29) are coaxially arranged arc structures with different radii, the axes of the arc structures at the two ends of the variable diameter arc frame (29) are coaxially arranged with the central axis of the cover plate (2), and the four variable diameter arc frames (29) are evenly distributed in a circular array around the central axis of the cover plate (2).

7. The sealing device of a garbage transport vehicle according to claim 1, characterized in that: A baffle (35) is provided on the side of the two vent holes (10) that are away from each other. The baffle (35) is fixed to the inner annular surface of the double-cavity arc plate (6), and the circular tube (8) is located between the two baffles (35).

8. The sealing device of a garbage transport vehicle according to claim 1, characterized in that: One end of the central end tube (21) located above the cover plate (2) is in contact with a resistance plate (36), a side of the resistance plate (36) away from the central end tube (21) is fixed with an elastic telescopic rod (37), and the other end of the elastic telescopic rod (37) is fixed to the upper surface of the cover plate (2).

9. The sealing device of a garbage transport vehicle according to claim 1, characterized in that: Pressure springs (38) are fixed at the four corners of the upper surface of the end frame (34) and located inside the cover plate (2), and the upper ends of the pressure springs (38) are fixed to the movable blocking columns (17).

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