Shelter capable of stably storing crop monitoring unmanned aerial vehicle

Abstract

The invention discloses a shelter capable of stably storing a crop monitoring unmanned aerial vehicle, and relates to the field of unmanned aerial vehicles, the shelter comprises supporting legs and lifting pipes slidably mounted in the supporting legs, a shelter body is fixedly mounted at the upper ends of the lifting pipes, and four storage cavities are formed in the shelter body; a rotating shaft is rotationally installed in the shelter body, and a turnover cover plate is fixedly installed at the upper end of the rotating shaft. According to the square cabin capable of stably storing the crop monitoring unmanned aerial vehicle, opening and closing of four sets of overturning cover plates are controlled at the same time, the four sets of overturning cover plates are horizontally arranged, simultaneous take-off and landing operation of the unmanned aerial vehicle in the square cabin is achieved, the use convenience of the square cabin is guaranteed, a driving plate, a driven plate and a limiting clamping plate move, and the working efficiency is improved. And automatic limiting of the unmanned aerial vehicle is completed, so that the unmanned aerial vehicle is located in the middle of the storage cavity, the unmanned aerial vehicle is prevented from making contact with the shelter and being damaged, and the protection effect of the shelter on unmanned aerial vehicle storage is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, and in particular to a cabin capable of stably storing a crop monitoring unmanned aerial vehicle. Background Art

[0002] The lower end of the drone is generally equipped with a high-definition camera to monitor surrounding targets, and its application in agriculture is gradually expanding. After the operation is completed, the drone needs to be stored in a cabin. However, the existing cabins still have certain usage defects during use. The existing cabins can only store a single drone during use. During the use of the drone, manual operation is required to take the drone out, which greatly reduces the convenience of using the cabin.

[0003] The patent with the patent authorization announcement number CN214608144U discloses a comprehensive support cabin for unmanned aerial vehicles. The comprehensive support cabin for unmanned aerial vehicles is arranged through the coordination of a splint, a rack, a first gear and a first motor. During use, the rotation of the first motor can drive the first gear to rotate. Under the action of the rack, the splint is driven to move, and the distance between the two splints is expanded to fix the unmanned aerial vehicle between the splints. After fixation, the first motor is reversed to drive the splint to move and clamp the unmanned aerial vehicle. After clamping, the first motor is turned off, and the unmanned aerial vehicle is fixed under the elastic force of the spring and the self-locking action of the motor, thereby facilitating the fixation of the unmanned aerial vehicle and achieving the purpose of facilitating the maintenance of the unmanned aerial vehicle.

[0004] The patent authorization announcement number CN217151457U discloses a cabin that can store multiple drones. It can park four drones at the same time and can automatically open the electric drawer through detection sensors, saving time and effort and further reducing the labor intensity of workers. Then, the surface of the drone can be cleaned and dried by a spray cleaning device and a hot air blower inside the cabin, further reducing the workload of daily maintenance, improving the level of automation and liberating productivity.

[0005] The above-mentioned public patent also has the following defects: during the operation, the drones inside the cabin need to be taken out one by one, and the drones are located inside the drawer box, and multiple drones are arranged above and below the drawer box, and they need to be taken out one by one, which delays the working time. In addition, the inside of the drawer box is smooth and flat, which may cause the drones to collide during the movement of the cabin, causing damage to the drones and resulting in poor protection of the cabin.

[0006] In response to the above problems, it is urgently necessary to carry out innovative designs based on the original cabin structure. Summary of the invention

[0007] The object of the present invention is to provide a cabin that can stably store crop monitoring drones, so as to solve the problem proposed in the above-mentioned background technology that the drone is located inside a drawer box, and multiple drones are arranged on the upper and lower parts of the drawer box, which need to be taken out one by one, delaying working time, and the interior of the drawer box is smooth and flat, which may easily cause the drone to collide during the movement of the cabin, easily causing damage to the drone, resulting in poor protection effect of the cabin.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cabin that can stably store a crop monitoring drone, comprising support legs and lifting tubes slidably installed inside the support legs; a cabin body is fixedly installed on the upper end of the lifting tube, and four groups of storage chambers are opened inside the cabin body, a rotating shaft is rotatably installed inside the cabin body, and a flip cover is fixedly installed on the upper end of the rotating shaft, and the flip cover is located at the upper end of the storage chamber; a driving structure for controlling the state of the flip cover is arranged inside the cabin body, a protective structure for limiting the position of the drone is arranged inside the cabin body, and a buffer structure for reducing damage caused by the placement of the drone is arranged inside the storage chamber.

[0009] Preferably, the driving structure includes a driving motor and an output shaft, and the output shaft is fixedly mounted on the outside of the driving motor and the output end of the driving motor, and the output shaft is located inside the cabin body.

[0010] Preferably, a rotating gear cylinder is fixedly mounted on the outer side of the output shaft, and the rotating gear cylinder and the output shaft are rotationally connected to the cabin body, and two groups of rotating gear cylinders are arranged on the outer side of the output shaft.

[0011] Preferably, the driving structure also includes an active gear plate, and the active gear plate is slidably installed inside the cabin body, and a driven gear plate is fixedly installed on the upper end of the active gear plate, and the active gear plate is meshingly connected with the rotating gear cylinder, and a driving gear is fixedly installed on the outer side of the rotating shaft, and the driving gear is meshingly connected with the driven gear plate.

[0012] Preferably, the protective structure comprises a connecting rod, and the connecting rod is fixedly mounted on the outside of the active tooth plate, and an active plate is fixedly mounted on one end of the connecting rod away from the active tooth plate, and the active plate is located inside the storage cavity.

[0013] Preferably, the protective structure also includes a driven plate, and the driven plate is slidably installed inside the storage cavity, and a traction rope is fixedly installed on the upper end of the driven plate, and a support spring is fixedly installed on one end of the driven plate close to the storage cavity, the traction rope passes through the cabin body, and the end of the traction rope away from the driven plate is fixedly connected to the upper end of the active plate.

[0014] Preferably, a fixed shaft is fixedly installed inside the driven plate and the active plate, and a limiting clamp is slidably installed on the outer side of the fixed shaft, and a return spring is sleeved on the outer side of the fixed shaft, and an elastic rope is fixedly installed on one side of the limiting clamp close to the middle position of the storage cavity, and the elastic rope runs through the active plate and the driven plate, and at the same time, one end of the elastic rope away from the limiting clamp is fixedly connected to the inner surface of the storage cavity.

[0015] Preferably, the buffer structure includes a support plate, and the support plate is slidably installed inside the storage cavity, and the support plate is located at the lower end of the active plate and the driven plate.

[0016] Preferably, a moving rod is fixedly installed on the lower end of the support plate, and a fixed cylinder is slidably installed on the outer side of the moving rod, and the lower end of the fixed cylinder is fixedly connected to the inner lower end of the storage cavity, and an air outlet is opened inside the fixed cylinder, and four groups of the moving rod and the fixed cylinder are arranged at the lower end of the support plate.

[0017] Preferably, a mounting rod is fixedly installed inside the storage cavity, and two groups of sliding parts are slidably installed on the outside of the mounting rod, and a tilting rod is rotatably installed on the upper end of the sliding part, and the upper end of the tilting rod is rotatably connected to the support plate; a strong spring is fixedly installed between the two groups of sliding parts, and the strong spring is located on the outside of the mounting rod.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. By driving the output shaft and the rotating gear cylinder with a driving motor, the opening and closing of four sets of flip covers can be controlled at the same time, and the four sets of flip covers are arranged horizontally, so that the drone inside the shelter can take off and land at the same time, ensuring the convenience of using the shelter.

[0019] 2. By closing the flip cover, the active plate, the driven plate and the limit clamp plate move to complete the automatic limit of the UAV, so that the UAV is located in the middle position of the storage chamber, avoiding contact between the UAV and the cabin and causing damage to the UAV. In the process of opening the flip cover, the active plate, the driven plate and the limit clamp plate will be separated from the UAV to avoid affecting the take-off operation of the UAV, effectively improving the protection effect of the cabin on the storage of UAVs.

[0020] 3. Furthermore, by providing a sliding support plate inside the storage cavity, the support plate can be moved downward inside the storage cavity to reduce the impact force between the drone and the support plate, thereby avoiding damage to the drone and protecting the drone.

[0021] 4. Furthermore, the initial downward movement of the support plate is slowed down by stretching the strong spring, and the discharge of the gas inside the fixed tube is slowed down by connecting the sliding part with the air outlet, thereby slowing down the downward movement of the support plate again, achieving the effect of reducing the impact force between the support plate and the drone, and protecting the placement of the drone.

[0022] 5. Furthermore, the support legs are slidably connected to the lifting tubes, and holes for installing bolts are provided between the support legs and the lifting tubes. The bolts can be installed in the holes at different positions to adjust the height of the modified cabin, thereby achieving the diversity of use of the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the flip cover of the present invention.

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving motor of the present invention.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the output shaft of the present invention.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the driven plate of the present invention.

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the mounting rod of the present invention.

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixing cylinder of the present invention.

[0031] In the figure: 1. Support leg; 2. Lifting tube; 3. Cabin body; 4. Storage chamber; 5. Rotating shaft; 6. Flip cover; 7. Driving gear; 8. Driving motor; 9. Output shaft; 10. Rotating gear cylinder; 11. Active gear plate; 12. Driven gear plate; 13. Connecting rod; 14. Active plate; 15. Driven plate; 16. Fixed shaft; 17. Return spring; 18. Limiting splint; 19. Elastic rope; 20. Support spring; 21. Traction rope; 22. Support plate; 23. Moving rod; 24. Fixed cylinder; 25. Air outlet; 26. Mounting rod; 27. Sliding part; 28. Power spring; 29. ​​Tilt rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: This embodiment Figure 1-Figure 5 As shown, in order to solve the problem that the existing square cabin needs to open the storage compartments in sequence for use when storing multiple drones, a process in which the square cabin can take off multiple drones at the same time is disclosed, so that the square cabin is easy to use, and its specific contents are as follows: a support leg 1 and a lifting tube 2 slidably installed inside the support leg 1; a square cabin body 3 is fixedly installed on the upper end of the lifting tube 2, and four groups of storage chambers 4 are opened inside the square cabin body 3, a rotating shaft 5 is rotatably installed inside the square cabin body 3, and a flip cover 6 is fixedly installed on the upper end of the rotating shaft 5, and the flip cover 6 is located at the upper end of the storage chamber 4; a driving structure for controlling the state of the flip cover 6 is arranged inside the square cabin body 3; the driving structure includes a driving motor 8 and an output shaft 9, and the driving motor 8 is fixedly mounted on the outside of the cabin body 3, and the output end of the driving motor 8 is fixedly mounted with an output shaft 9, and the output shaft 9 is located inside the cabin body 3; a rotating gear cylinder 10 is fixedly mounted on the outside of the output shaft 9, and the rotating gear cylinder 10 and the output shaft 9 are rotatably connected with the cabin body 3, and the rotating gear cylinder 10 is provided with two groups on the outside of the output shaft 9; the driving structure also includes an active gear plate 11, and the active gear plate 11 is slidably mounted inside the cabin body 3, and a driven gear plate 12 is fixedly mounted on the upper end of the active gear plate 11, and the active gear plate 11 is meshedly connected with the rotating gear cylinder 10, and a driving gear 7 is fixedly mounted on the outside of the rotating shaft 5, and the driving gear 7 is meshedly connected with the driven gear plate 12.

[0034] When using the square cabin that can stably store crop monitoring drones, first place the square cabin at the position where work is required. After placing the square cabin in an open position, the square cabin can be opened, so that the flip cover 6 is opened and the drone stored in the storage chamber 4 takes off to perform monitoring operations. In the process of opening the flip cover 6, it is necessary to make the drive motor 8 work and drive the output shaft 9 to rotate. The rotation of the output shaft 9 will drive the active tooth plate 11 to slide through the rotating gear cylinder 10 fixedly installed on its outer side. The sliding of the active tooth plate 11 will drive the driven tooth plate 12 at its upper end to move, and the rotating The two groups of driven gear plates 12 at the upper end of the gear cylinder 10 will move away from each other. At this time, the driven gear plates 12 will drive the driving gear 7 meshing with it to rotate, and the rotation of the driving gear 7 will drive the flip cover 6 to open through the rotating shaft 5, and then the drone inside the storage chamber 4 can fly out and monitor the crops. At the same time, after the drone completes the operation and enters the storage chamber 4, the output shaft 9 can be driven by the driving motor 8 to rotate in the opposite direction, so that the four groups of flip cover plates 6 can close the four groups of storage chambers 4 at the same time, completing the rapid closing and opening process of the cabin, effectively improving the convenience of using the cabin.

[0035] Embodiment 2: This embodiment is as follows Figure 1-Figure 6 As shown, in order to solve the problem that the UAV inside the existing cabin is difficult to automatically limit, the process of the cabin automatically limiting the UAV is disclosed, so that the cabin can automatically protect the UAV, and the specific contents are as follows: a protective structure for limiting the UAV is arranged inside the cabin body 3; the protective structure includes a connecting rod 13, and the connecting rod 13 is fixedly installed on the outside of the active tooth plate 11, and an active plate 14 is fixedly installed at one end of the connecting rod 13 away from the active tooth plate 11, and the active plate 14 is located inside the storage chamber 4; the protective structure also includes a driven plate 15, and the driven plate 15 is slidably installed inside the storage chamber 4, and the upper end of the driven plate 15 is fixedly installed with A traction rope 21, and a support spring 20 is fixedly installed on one end of the driven plate 15 close to the storage chamber 4, the traction rope 21 passes through the cabin body 3, and the end of the traction rope 21 away from the driven plate 15 is fixedly connected to the upper end of the active plate 14; a fixed shaft 16 is fixedly installed inside the driven plate 15 and the active plate 14, and a limiting clamp 18 is slidably installed on the outer side of the fixed shaft 16, and a return spring 17 is sleeved on the outer side of the fixed shaft 16, and an elastic rope 19 is fixedly installed on one side of the limiting clamp 18 close to the middle position of the storage chamber 4, and the elastic rope 19 passes through the active plate 14 and the driven plate 15, and at the same time, the end of the elastic rope 19 away from the limiting clamp 18 is fixedly connected to the inner surface of the storage chamber 4.

[0036] When using the square cabin that can stably store crop monitoring drones, the drone will be stored inside the storage chamber 4, and after the drone completes the operation and enters the storage chamber 4, the flip cover 6 will be closed. During this process, rotating the gear cylinder 10 will drive the active gear plate 11 to move, and the movement of the active gear plate 11 will drive the connecting rod 13 to move synchronously. At this time, the movement of the connecting rod 13 will push the active plate 14 to move into the storage chamber 4. At this time, the movement of the active plate 14 will pull the driven plate 15 through the traction rope 21, so that the driven plate 15 and the active plate 14 can move toward the center position of the storage chamber 4 at the same time, and the movement of the driven plate 15 and the active plate 14 will drive the limiting splint 18 to move synchronously. At this time, the movement of the limiting splint 18 will be pulled by the elastic rope 19, and the limiting splint 18 will move in the direction of the connecting rod 13, and During the movement of the limiting clamp 18, the return spring 17 will be squeezed and the return spring 17 will be contracted. At the same time, the driven plate 15 will squeeze the supporting spring 20 and contract the supporting spring 20. The active plate 14, the driven plate 15 and the limiting clamp 18 will contact the supporting feet of the UAV and push the UAV to the middle position of the supporting plate 22, thereby limiting the UAV inside the storage chamber 4 to avoid the collision between the UAV and the cabin during the transportation of the cabin, thereby protecting the UAV; and in the process of opening the flip cover 6, the active plate 14 will be reset under the action of the connecting rod 13, and the driven plate 15 and the limiting clamp 18 will be reset under the action of the supporting spring 20 and the return spring 17 respectively, thereby avoiding affecting the take-off of the UAV and ensuring the safety of the cabin.

[0037] Embodiment 3: This embodiment is as follows Figure 1 and Figure 7-Figure 8As shown, in order to solve the problem that the drone is damaged due to the drone's automatic landing speed being too fast or the manual placement force being too heavy, the drone's retraction and release buffering process is disclosed, and the effect of automatic protection during the drone placement process is achieved. The specific contents are as follows: a buffer structure for slowing down the damage caused by the drone placement is arranged inside the storage chamber 4; the buffer structure includes a support plate 22, and the support plate 22 is slidably installed inside the storage chamber 4, and the support plate 22 is located at the lower end of the active plate 14 and the driven plate 15; a motion rod 23 is fixedly installed at the lower end of the support plate 22, and a fixed Cylinder 24, and the lower end of the fixed cylinder 24 is fixedly connected to the lower end of the interior of the storage chamber 4, and an air outlet 25 is opened inside the fixed cylinder 24, and four groups of moving rods 23 and fixed cylinders 24 are arranged at the lower end of the support plate 22; a mounting rod 26 is fixedly installed inside the storage chamber 4, and two groups of sliding members 27 are slidably installed on the outer side of the mounting rod 26, and a tilting rod 29 is rotatably installed on the upper end of the sliding member 27, and the upper end of the tilting rod 29 is rotatably connected to the support plate 22; a strong spring 28 is fixedly installed between the two groups of sliding members 27, and the strong spring 28 is located on the outer side of the mounting rod 26.

[0038] After the drone inside the cabin completes the operation, it needs to be stored in the storage chamber 4. During the process of placing the drone inside the storage chamber 4, the drone can be placed manually or automatically landed inside the storage chamber 4. During this process, the drone will fall on the upper end of the support plate 22. When the drone automatically falls too fast or the force of manual placement of the drone is too great, the support plate 22 will be impacted and move downward. At this time, the support plate 22 will drive the motion rod 23 to move downward inside the fixed cylinder 24, and the downward movement of the motion rod 23 will cause the gas inside the fixed cylinder 24 to be quickly discharged through the gas outlet 25, and the tilting rod 29 will rotate under the action of the support plate 22, and the rotation of the tilting rod 29 will push the sliding member 2 7 slides on the outside of the mounting rod 26, and the two sets of sliding members 27 slide away from each other, at this time the strong spring 28 will stretch, and the stretching of the strong spring 28 will reverse the movement of the sliding member 27 and the tilting rod 29, thereby slowing down the downward movement of the support plate 22, and in the process of the sliding member 27 moving, the sliding member 27 will enter the inside of the air outlet 25, thereby reducing the exhaust space inside the air outlet 25, and then reducing the speed of gas discharge inside the fixed cylinder 24, so that the speed of the moving rod 23 moving downward inside the fixed cylinder 24 can be reduced, thereby slowing down the downward movement of the support plate 22 again, and by slowing down the downward movement of the support plate 22 twice, the impact between the drone and the support plate 22 can be reduced, the drone itself is protected, and the overall practicality is increased.

[0039] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cabin capable of stably storing a crop monitoring drone, comprising a support leg (1) and a lifting tube (2) slidably mounted inside the support leg (1); characterized in that: A cabin body (3) is fixedly mounted on the upper end of the lifting tube (2), and four groups of storage chambers (4) are provided inside the cabin body (3); a rotating shaft (5) is rotatably mounted inside the cabin body (3), and a flip cover (6) is fixedly mounted on the upper end of the rotating shaft (5), and the flip cover (6) is located at the upper end of the storage chamber (4); a driving structure for controlling the state of the flip cover (6) is provided inside the cabin body (3), a protective structure for limiting the position of a drone is provided inside the cabin body (3), and a buffer structure for reducing damage to the drone when placed inside the storage chamber (4) is provided inside the storage chamber (4).

2. The square cabin capable of stably storing a crop monitoring drone according to claim 1, characterized in that: The driving structure comprises a driving motor (8) and an output shaft (9), wherein the driving motor (8) is fixedly mounted on the outside of the cabin body (3), and the output shaft (9) is fixedly mounted on the output end of the driving motor (8), while the output shaft (9) is located inside the cabin body (3).

3. The square cabin capable of stably storing a crop monitoring drone according to claim 2, characterized in that: A rotating gear cylinder (10) is fixedly mounted on the outer side of the output shaft (9), and the rotating gear cylinder (10) and the output shaft (9) are rotationally connected to the cabin body (3), and two groups of rotating gear cylinders (10) are arranged on the outer side of the output shaft (9).

4. The square cabin capable of stably storing a crop monitoring drone according to claim 1, characterized in that: The driving structure further comprises an active tooth plate (11), and the active tooth plate (11) is slidably mounted inside the cabin body (3), and a driven tooth plate (12) is fixedly mounted on the upper end of the active tooth plate (11), and the active tooth plate (11) is meshingly connected with the rotating gear cylinder (10), and a driving gear (7) is fixedly mounted on the outer side of the rotating shaft (5), and the driving gear (7) is meshingly connected with the driven tooth plate (12).

5. The square cabin capable of stably storing a crop monitoring drone according to claim 1, characterized in that: The protective structure comprises a connecting rod (13), wherein the connecting rod (13) is fixedly mounted on the outside of the active tooth plate (11), and an active plate (14) is fixedly mounted on one end of the connecting rod (13) away from the active tooth plate (11), and the active plate (14) is located inside the storage cavity (4).

6. The square cabin capable of stably storing a crop monitoring drone according to claim 1, characterized in that: The protective structure further comprises a driven plate (15), and the driven plate (15) is slidably mounted inside the storage chamber (4), and a traction rope (21) is fixedly mounted on the upper end of the driven plate (15), and a support spring (20) is fixedly mounted on one end of the driven plate (15) close to the storage chamber (4), the traction rope (21) passes through the cabin body (3), and one end of the traction rope (21) away from the driven plate (15) is fixedly connected to the upper end of the active plate (14).

7. The square cabin capable of stably storing a crop monitoring drone according to claim 6, characterized in that: A fixed shaft (16) is fixedly installed inside the driven plate (15) and the active plate (14), and a limit clamp (18) is slidably installed on the outer side of the fixed shaft (16), and a return spring (17) is sleeved on the outer side of the fixed shaft (16), and an elastic rope (19) is fixedly installed on one side of the limit clamp (18) close to the middle position of the storage chamber (4), and the elastic rope (19) passes through the active plate (14) and the driven plate (15), and at the same time, one end of the elastic rope (19) away from the limit clamp (18) is fixedly connected to the inner surface of the storage chamber (4).

8. The square cabin capable of stably storing a crop monitoring drone according to claim 1, characterized in that: The buffer structure comprises a support plate (22), and the support plate (22) is slidably mounted inside the storage cavity (4), and the support plate (22) is located at the lower ends of the active plate (14) and the driven plate (15).

9. The square cabin capable of stably storing a crop monitoring drone according to claim 8, characterized in that: A moving rod (23) is fixedly mounted on the lower end of the support plate (22), and a fixed cylinder (24) is slidably mounted on the outer side of the moving rod (23), and the lower end of the fixed cylinder (24) is fixedly connected to the lower end of the storage chamber (4), and an air outlet (25) is provided inside the fixed cylinder (24). Four groups of the moving rod (23) and the fixed cylinder (24) are arranged at the lower end of the support plate (22).

10. The square cabin capable of stably storing a crop monitoring drone according to claim 1, characterized in that: A mounting rod (26) is fixedly installed inside the storage chamber (4), and two groups of sliding members (27) are slidably installed on the outer side of the mounting rod (26), and a tilting rod (29) is rotatably installed on the upper end of the sliding member (27), and the upper end of the tilting rod (29) is rotatably connected to the support plate (22); a strong spring (28) is fixedly installed between the two groups of sliding members (27), and the strong spring (28) is located on the outer side of the mounting rod (26).

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