Soil turning and maintaining device for seedling cultivation

Abstract

The invention provides a nursery stock cultivation soil turning and maintaining device, and relates to the technical field of nursery stock cultivation. The seedling cultivation soil turning and maintaining device comprises a support mechanism, a plurality of soil turning mechanisms are arranged at the lower end in the support mechanism, a liquid medicine box is fixedly arranged at the position, close to the front side, of the upper end of the support mechanism, a water pump is arranged in the liquid medicine box, and a plurality of output ports are formed in the rear side of the liquid medicine box in a penetrating mode; the soil turning mechanism comprises a fixed main shaft, a lower supporting seat is fixedly arranged at the lower end of the fixed main shaft, a coulter is fixedly arranged at the front end of the lower supporting seat, and a supporting shaft is fixedly arranged between the upper side of the rear end of the coulter and the fixed main shaft; and two fixed inner cylinders are fixedly arranged at the upper end of the lower supporting seat. Pesticide spraying is driven through soil turning kinetic energy, and energy saving and intelligence are achieved. Through a special structure, precise control over medicine discharging is achieved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of nursery stock cultivation, and particularly to a soil-turning and maintenance device for nursery stock cultivation. Background Art

[0002] In the process of nursery stock cultivation, soil turning and maintenance are key links to ensure the healthy growth of nursery stocks. Traditional soil-turning and maintenance devices usually carry out soil turning and liquid medicine spraying operations separately. During the soil turning operation, the plow blade soil turning method is generally adopted. Although this method can turn the soil, a large amount of dust is easily generated during the operation. On the one hand, the raising of dust not only pollutes the operation environment, affects the air quality of the surrounding area, but also may have an adverse impact on the growth of nearby nursery stocks, such as blocking the stomata of nursery stocks and hindering the normal progress of photosynthesis and respiration. On the other hand, the diffusion of dust will also pose a health hazard to maintenance workers. Long-term inhalation may lead to problems such as respiratory diseases.

[0003] In the subsequent liquid medicine spraying link, a medicine spraying device often needs to be equipped separately. Since the traditional spraying method is mostly aerial spraying, before the liquid medicine reaches the land, it is extremely easy to be dispersed in the air by factors such as wind and air flow. This not only causes a large amount of waste of liquid medicine, increases the maintenance cost, but also may cause some liquid medicine to mix into the air, posing a threat to the physical health of maintenance workers. For example, when some liquid medicines with pungent odors or toxicity are dispersed in the air, workers may experience respiratory discomfort, allergic reactions or even poisoning after inhalation. In addition, the uneven spraying of liquid medicine will also affect the effect of nursery stock cultivation. Some areas may have phytotoxicity due to excessive liquid medicine, while some areas may not achieve the expected maintenance purpose due to insufficient liquid medicine. Summary of the Invention

[0004] Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a soil-turning and maintenance device for nursery stock cultivation, which solves the problems of a large amount of dust, waste of liquid medicine and endangerment to personnel safety in traditional soil-turning and maintenance.

[0006] Technical Solutions

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A soil-turning and maintenance device for nursery stock cultivation includes a support mechanism. A plurality of soil-turning mechanisms are arranged at the lower end inside the support mechanism. A medicine water tank is fixedly arranged at the front side of the upper end of the support mechanism. A water pump is arranged inside the medicine water tank. A plurality of output ports are arranged through the rear side of the medicine water tank. The plurality of output ports are connected to the output end of the water pump for outputting liquid medicine;

[0008] The soil-turning mechanism includes a fixed main shaft. A lower support base is fixedly arranged at the lower end of the fixed main shaft. A plow blade is fixedly arranged at the front end of the lower support base. A support shaft is fixedly arranged between the upper side of the rear end of the plow blade and the fixed main shaft. Two fixed inner cylinders are fixedly arranged at the upper end of the lower support base. The inside of the fixed main shaft is hollow and is connected to the inside of the fixed inner cylinder through the inside of the lower support base. The output port is connected to the upper opening of the fixed main shaft through a pipeline. Upper connection rings are fixedly arranged at the upper ends of the two fixed inner cylinders. Rotating outer cylinders are arranged at the upper ends of the two upper connection rings through waterproof bearings. Rotating rings are rotatably arranged at the inner tops of the two rotating outer cylinders. The two rotating rings can only rotate 15° inside the rotating outer cylinders. Reset springs are fixedly connected between the upper ends of the two rotating rings and the inner tops of the two rotating outer cylinders respectively.

[0009] Preferably, a plurality of inner medicine outlets are opened on the bodies of the two fixed inner cylinders. A plurality of outer medicine outlets are opened on the bodies of the two rotating outer cylinders. A plurality of power plates are fixedly arranged at positions close to the upper ends of the exteriors of the two rotating outer cylinders.

[0010] Preferably, a plurality of balls are evenly fixedly arranged on the exteriors of the two upper connection rings. A plurality of rolling grooves are evenly opened on the inner surfaces of the two rotating rings. The plurality of balls are respectively arranged to roll inside the plurality of rolling grooves.

[0011] Preferably, the support mechanism includes a main support frame. A connecting frame is fixedly arranged at the front end of the main support frame. A front main shaft is fixedly arranged inside the connecting frame. Moving wheels are rotatably arranged at both ends of the front main shaft.

[0012] Preferably, an adjusting frame is rotatably arranged at the lower end inside the main support frame. A plurality of connection ports are fixedly arranged inside the adjusting frame. A lower limit block is fixedly arranged at a position close to the upper end of the shaft body of the fixed main shaft. A fixing nut is threadedly connected to the upper end of the fixed main shaft. The plurality of soil-turning mechanisms are arranged inside the plurality of connection ports through the lower limit block and fixed threads.

[0013] Preferably, an adjusting oil cylinder is hingedly arranged at the upper end of the main support frame. The other end of the adjusting oil cylinder is hingedly arranged at a position close to the upper end of the rear end of the front main shaft.

[0014] Preferably, a rolling ground shaft is fixedly arranged at a position close to the rear side at the lower end of the main support frame. A plurality of rolling ground wheels are rotatably arranged on the shaft body of the rolling ground shaft.

[0015] Advantageous effects

[0016] The present invention provides a soil-turning and maintenance device for nursery stock cultivation. It has the following advantageous effects:

[0017] 1. The present invention provides a soil-turning and maintenance device for nursery stock cultivation. This device innovatively combines the functions of soil turning and liquid medicine spraying. During the soil-turning process, through a specially designed soil-turning mechanism, the liquid medicine can directly flow into the turned soil. Compared with the traditional method of turning the soil first and then spraying the liquid medicine in the air, it greatly reduces the time for the liquid medicine to be exposed in the air, effectively reducing the waste of the liquid medicine caused by dispersion, volatilization, etc. At the same time, it avoids the pollution of the environment caused by a large amount of liquid medicine floating in the air and the impact on the staff, which is conducive to creating a green and environmentally friendly nursery stock cultivation operation environment.

[0018] 2. The present invention provides a soil-turning and maintenance device for nursery stock cultivation. This device realizes the synchronous operation of soil turning and spraying, eliminating the need to operate the soil-turning equipment and spraying equipment separately, reducing the operation procedures and time costs, and significantly improving the maintenance efficiency of nursery stock cultivation. Moreover, through the ingenious design of the rotating outer cylinder and the medicine inlet of the fixed inner cylinder, the liquid medicine can be accurately injected at the moment when the soil is turned, ensuring that the liquid medicine is evenly and accurately applied to the soil area that needs to be maintained, improving the accuracy of maintenance, providing more suitable nutrient and environmental conditions for the growth of nursery stock, and helping to improve the growth quality of nursery stock. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric schematic diagram of the present invention;

[0020] Figure 2 is another axonometric schematic diagram of the present invention from a different perspective;

[0021] Figure 3 is an axonometric schematic diagram of the support mechanism of the present invention;

[0022] Figure 4 is an axonometric schematic diagram of the soil-turning mechanism of the present invention;

[0023] Figure 5 is another axonometric schematic diagram of the soil-turning mechanism of the present invention from a different perspective;

[0024] Figure 6 is a cross-sectional schematic diagram of the rotating outer cylinder and the fixed inner cylinder of the present invention;

[0025] Figure 7 is a partial cross-sectional schematic diagram of the rotating outer cylinder of the present invention;

[0026] Figure 8 is a partial cross-sectional schematic diagram of the rotating outer cylinder and the fixed inner cylinder of the present invention.

[0027] Among them, 1. Soil-turning mechanism; 2. Bracket mechanism; 3. Medicine water tank; 4. Output port; 101. Fixed nut; 102. Fixed main shaft; 103. Lower limit block; 104. Support shaft; 105. Plow blade; 106. Rotating outer cylinder; 107. Power plate; 108. Lower support seat; 109. Outer medicine outlet; 110. Fixed inner cylinder; 111. Upper connecting ring; 112. Inner medicine outlet; 113. Ball; 114. Rotating ring; 115. Return spring; 116. Rolling groove; 201. Main support frame; 202. Adjusting oil cylinder; 203. Adjusting frame; 204. Connecting port; 205. Ground-rolling shaft; 206. Ground-rolling wheel; 207. Moving wheel; 208. Front main shaft; 209. Connecting frame. Detailed implementation manner

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment:

[0030] As Figure 1-8 As shown, the embodiment of the present invention provides a soil-turning and maintenance device for seedling cultivation, including a bracket mechanism 2. A plurality of soil-turning mechanisms 1 are arranged at the lower end inside the bracket mechanism 2. A medicine water tank 3 is fixedly arranged at the front side of the upper end of the bracket mechanism 2. A water pump is arranged inside the medicine water tank 3. A plurality of output ports 4 are arranged through the rear side of the medicine water tank 3. The plurality of output ports 4 are connected to the output end of the water pump for outputting liquid medicine.

[0031] Specifically, in the above specific embodiment, after the water pump is started, the liquid medicine in the medicine water tank 3 is pressurized and conveyed to the upper end opening of the fixed main shaft 102 through the output port 4 and the connected pipeline. The water pressure is used to drive the liquid medicine to flow inside the device, providing a power source for the subsequent medicine spraying link. This integrated liquid medicine conveying design is simple and efficient. The medicine water tank 3 is directly arranged on the bracket mechanism 2, reducing the connection of external complex pipelines, reducing the risk of liquid medicine leakage, and at the same time facilitating the movement and operation of the overall device, ensuring the flexible operation requirements in the seedling cultivation area.

[0032] As Figure 4-8As shown in the figure, the soil-turning mechanism 1 includes a fixed main shaft 102. At the lower end of the fixed main shaft 102, a lower support base 108 is fixedly arranged. At the front end of the lower support base 108, a plow blade 105 is fixedly arranged. Between the upper side of the rear end of the plow blade 105 and the fixed main shaft 102, a support shaft 104 is fixedly arranged. At the upper end of the lower support base 108, two fixed inner cylinders 110 are fixedly arranged. The inside of the fixed main shaft 102 is hollow and is connected to the inside of the fixed inner cylinder 110 through the inside of the lower support base 108. The output port 4 is connected to the opening at the upper end of the fixed main shaft 102 through a pipeline. At the upper ends of the two fixed inner cylinders 110, upper connection rings 111 are fixedly arranged. At the upper ends of the two upper connection rings 111, rotary outer cylinders 106 are arranged through waterproof bearings. At the inner tops of the two rotary outer cylinders 106, rotating rings 114 are rotatably arranged. The two rotating rings 114 can only rotate 15° inside the rotary outer cylinders 106. Between the upper ends of the two rotating rings 114 and the inner tops of the two rotary outer cylinders 106 respectively, return springs 115 are fixedly connected;

[0033] Specifically, in the above specific embodiment, when the device moves, the plow blade 105 inserts into the soil and turns it over. During the process of the soil turning to both sides, it impacts the power plate 107, driving the rotary outer cylinder 106 to rotate around the waterproof bearing. Since the fixed main shaft 102 is connected to the fixed inner cylinder 110 and is hollow inside, the liquid medicine flows from the medicine water tank 3 into the fixed main shaft 102 through the pipeline and then enters the fixed inner cylinder 110. When the rotary outer cylinder 106 rotates, the rotating ring 114 inside it first rotates 15° under the cooperation of the ball 113 and the rolling groove 116, driving the return spring 115 to twist and store energy. When the rotary outer cylinder 106 continues to rotate, the ball 113 switches to the next rolling groove 116 to achieve continuous rotation; when it stops rotating, the return spring 115 releases the torsion force, driving the rotating ring 114 and the rotary outer cylinder 106 to reset by 15°. Using the natural force of the soil turning to drive the rotary outer cylinder 106 to rotate, no additional power source is required, which is energy-saving and efficient. The design of the rotating ring 114 and the return spring 115 not only realizes the precise control of the rotation angle of the rotary outer cylinder 106, but also can automatically reset at the end of the operation, ensuring that the medicine outlet is misaligned to stop spraying medicine, preventing waste of liquid medicine, and improving the automation degree of the device.

[0034] As Figure 6-8 shown in the figure, a plurality of inner medicine outlets 112 are opened on the barrel bodies of the two fixed inner cylinders 110, a plurality of outer medicine outlets 109 are opened on the barrel bodies of the two rotary outer cylinders 106, a plurality of power plates 107 are fixedly arranged at positions near the upper ends of the two rotary outer cylinders 106, a plurality of balls 113 are evenly fixedly arranged on the outer parts of the two upper connection rings 111, a plurality of rolling grooves 116 are evenly opened on the inner surfaces of the two rotating rings 114, and the plurality of balls 113 are respectively arranged to roll inside the plurality of rolling grooves 116;

[0035] Specifically, in the above specific embodiments, when the rotating outer cylinder 106 rotates, the relative positions of the outer medicine outlet 109 and the inner medicine outlet 112 change, and the two will coincide periodically during the rotation process. The soil impact power plate 107 provides power for the rotation of the rotating outer cylinder 106. The ball 113 rolls in the rolling groove 116 to ensure the smooth relative rotation of the rotating ring 114 and the rotating outer cylinder 106, while restricting the rotation angle of the rotating ring 114. The design of the inner and outer medicine outlets 109 enables the liquid medicine to be sprayed regularly during the rotation of the rotating outer cylinder 106, accurately corresponding to the timing of soil turning, and improving the utilization rate of the liquid medicine. The power plate 107 cleverly utilizes the kinetic energy of soil turning. The cooperation between the ball 113 and the rolling groove 116 not only ensures the rotation flexibility but also precisely controls the rotation angle, enhancing the stability and reliability of the entire soil turning and spraying process.

[0036] As Figure 3 shown, the support mechanism 2 includes a main support frame 201. A connecting frame 209 is fixedly arranged at the front end of the main support frame 201. A front main shaft 208 is fixedly arranged inside the connecting frame 209. Moving wheels 207 are rotatably arranged at both ends of the front main shaft 208. A rolling ground shaft 205 is fixedly arranged at a position near the rear side of the lower end of the main support frame 201. A plurality of rolling ground wheels 206 are rotatably arranged on the shaft body of the rolling ground shaft 205;

[0037] Specifically, in the above specific embodiments, the cooperation between the connecting frame 209 and the front main shaft 208 enables the moving wheels 207 to rotate flexibly, facilitating the movement and turning of the entire device on the ground. The rolling ground shaft 205 and the rolling ground wheels 206 play a role in assisting the support and stabilizing the device. During the movement of the device, the rolling ground wheels 206 roll along with the undulation of the ground to ensure the smooth forward movement of the device. The combined design of the moving wheels 207 and the rolling ground wheels 206 greatly enhances the moving performance of the device under different terrain conditions. The moving wheels 207 are responsible for the main turning and moving, and the rolling ground wheels 206 assist in supporting and reducing the pressure of the device on the ground, preventing the device from sinking into soft soil, and ensuring the efficient and stable operation of the device in the nursery area.

[0038] An adjusting frame 203 is rotatably arranged at the lower end inside the main support frame 201. A plurality of connecting ports 204 are fixedly arranged inside the adjusting frame 203. A lower limit block 103 is fixedly arranged at a position near the upper end of the shaft body of the fixed main shaft 102. A fixing nut 101 is threadedly connected to the upper end of the fixed main shaft 102. A plurality of soil turning mechanisms 1 are arranged inside the plurality of connecting ports 204 through the lower limit block 103 and fixed threads. An adjusting oil cylinder 202 is hingedly arranged at the upper end of the main support frame 201, and the other end of the adjusting oil cylinder 202 is hingedly arranged at a position near the upper end of the rear end of the front main shaft 208;

[0039] Specifically, in the above specific embodiment, when the adjusting oil cylinder 202 extends or contracts, it drives the front main shaft 208 to rotate around the hinge point, thereby changing the inclination angle of the main support frame 201, and realizing the adjustment of the penetration depth of the adjusting frame 203 and the soil-turning mechanism 1 installed thereon. The fixing nut 101 cooperates with the lower limit block 103 to stably install the soil-turning mechanism 1 in the connection port 204 of the adjusting frame 203. The design of the adjusting oil cylinder 202 enables the turning depth to be flexibly adjusted according to the actual nursery stock cultivation requirements, improving the adaptability of the device to different soil conditions and nursery stock types. The convenient installation method of the soil-turning mechanism 1 facilitates disassembly and assembly during maintenance or component replacement, reducing the later maintenance cost and enhancing the practicality of the device.

[0040] Working principle: This device mainly consists of a bracket mechanism 2, a soil-turning mechanism 1, and a medicine water tank 3. The bracket mechanism 2 is installed behind the towing vehicle, providing support and power transmission basis for the movement and operation of the entire device.

[0041] During operation, the towing vehicle drives the device forward, and the plow blade 105 in the soil-turning mechanism 1 first contacts the land and plows it open. As the device moves, the plowed soil moves to both sides of the plow blade 105. During this process, the soil will impact the power plate 107 at a position near the upper end outside the rotating outer cylinder 106. The continuous soil impact force causes the rotating outer cylinder 106 to start rotating around the waterproof bearing.

[0042] A water pump is provided inside the medicine water tank 3. A plurality of output ports 4 at the rear side of the medicine water tank 3 are connected to the output end of the water pump. The output ports 4 are connected to the upper end opening of the fixed main shaft 102 through pipelines. The fixed main shaft 102 is hollow inside and is connected to the inside of the fixed inner cylinder 110 through the inside of the lower support seat 108. A plurality of inner medicine outlets 112 are provided on the barrel body of the fixed inner cylinder 110, and a plurality of outer medicine outlets 109 are provided on the barrel body of the rotating outer cylinder 106. In the initial state, the inner medicine outlets 112 and the outer medicine outlets 109 are misaligned, and the liquid medicine is sealed inside the fixed inner cylinder 110. When the rotating outer cylinder 106 rotates, the originally misaligned outer medicine outlets 109 and inner medicine outlets 112 will continuously overlap. Once they overlap, the liquid medicine inside the fixed inner cylinder 110 will flow out through the overlapping medicine outlets and directly enter the just-plowed land, thereby realizing synchronous soil turning and spraying.

[0043] During the rotation of the rotating outer cylinder 106, the rotating ring 114 at the top inside it will also rotate accordingly. A plurality of ball bearings 113 uniformly fixed on the outside of the upper connecting ring 111 are rotatably arranged inside a plurality of rolling grooves 116 uniformly formed on the inner surface of the rotating ring 114. When the rotating outer cylinder 106 starts to rotate, under the support of the ball bearings 113 and the rolling grooves 116, the rotating ring 114 will first rotate by 15°, and at the same time drive the return spring 115 to twist. As the rotating outer cylinder 106 continues to rotate, the ball bearings 113 will be squeezed and move from the original rolling grooves 116 to the next rolling grooves 116. At this time, the rotating outer cylinder 106 can continue to rotate and maintain the spraying state. When the plowing is paused or ended, the rotating outer cylinder 106 stops rotating, and the ball bearings 113 will snap into the rolling grooves 116. At this time, the torsional force on the return spring 115 disappears, and the return spring 115 pushes the rotating ring 114 to reset by 15°. Due to the frictional force between the ball bearings 113 and the rolling grooves 116, the rotating ring 114 will drive the rotating outer cylinder 106 to also reset by 15°, thereby ensuring that the outer medicine outlet 109 and the inner medicine outlet 112 are misaligned again after the operation ends, automatically pausing the spraying, and realizing the automatic control and precise adjustment of the spraying process of the device.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seedling cultivation and soil turning and maintenance device, comprising a support mechanism (2), characterized in that: A plurality of soil turning mechanisms (1) are arranged at the lower end of the support mechanism (2), a medicine liquid tank (3) is fixedly arranged at the front side of the upper end of the support mechanism (2), a water pump is arranged inside the medicine liquid tank (3), and a plurality of output ports (4) are arranged through the rear side of the medicine liquid tank (3), and the plurality of output ports (4) are connected to the output end of the water pump for outputting medicine liquid; The soil turning mechanism (1) comprises a fixed main shaft (102), a lower support seat (108) is fixedly provided at the lower end of the fixed main shaft (102), a plow (105) is fixedly provided at the front end of the lower support seat (108), a support shaft (104) is fixedly provided between the upper side of the rear end of the plow (105) and the fixed main shaft (102), two fixed inner cylinders (110) are fixedly provided at the upper end of the lower support seat (108), the fixed main shaft (102) is hollow inside and is connected to the inside of the fixed inner cylinder (110) through the inside of the lower support seat (108), and the output port (4) is connected to the fixed inner cylinder (110) through the inside of the fixed main shaft (102). The fixed inner cylinders (110) are connected to the upper opening of the fixed main shaft (102) through a pipeline. The upper ends of the two fixed inner cylinders (110) are fixedly provided with upper connecting rings (111). The upper ends of the two upper connecting rings (111) are provided with rotating outer cylinders (106) through waterproof bearings. The tops of the two rotating outer cylinders (106) are rotatably provided with rotating rings (114). The two rotating rings (114) can only rotate 15 degrees inside the rotating outer cylinders (106). The upper ends of the two rotating rings (114) are respectively fixedly connected to the tops of the two rotating outer cylinders (106).

2. A seedling cultivation soil turning and maintenance device according to claim 1, characterized in that: The two fixed inner cylinders (110) are each provided with a plurality of inner medicine outlets (112), the two rotating outer cylinders (106) are each provided with a plurality of outer medicine outlets (109), and a plurality of power plates (107) are fixedly arranged on the outside of the two rotating outer cylinders (106) near the upper end.

3. The seedling cultivation soil turning and maintenance device according to claim 1, characterized in that: A plurality of rolling balls (113) are evenly and fixedly arranged on the outside of the two upper connecting rings (111), a plurality of rolling grooves (116) are evenly opened on the inner surfaces of the two rotating rings (114), and the plurality of rolling balls (113) are respectively rollingly arranged inside the plurality of rolling grooves (116).

4. The seedling cultivation soil turning and maintenance device according to claim 1, characterized in that: The support mechanism (2) comprises a main support frame (201), a connecting frame (209) is fixedly arranged at the front end of the main support frame (201), a front main shaft (208) is fixedly arranged inside the connecting frame (209), and moving wheels (207) are rotatably arranged at both ends of the front main shaft (208).

5. The seedling cultivation soil turning and maintenance device according to claim 4, characterized in that: An adjusting frame (203) is rotatably arranged at the lower end of the main support frame (201), a plurality of connection ports (204) are fixedly arranged inside the adjusting frame (203), a lower limit block (103) is fixedly arranged near the upper end of the fixed main shaft (102), a fixing nut (101) is threadedly connected to the upper end of the fixed main shaft (102), and a plurality of soil turning mechanisms (1) are arranged inside the plurality of connection ports (204) via the lower limit block (103) and the fixed threads.

6. The seedling cultivation soil turning and maintenance device according to claim 5, characterized in that: An adjusting oil cylinder (202) is hingedly provided at the upper end of the main support frame (201), and the other end of the adjusting oil cylinder (202) is hingedly provided at a position close to the upper end at the rear end of the front main shaft (208).

7. The seedling cultivation soil turning and maintenance device according to claim 4, characterized in that: A rolling shaft (205) is fixedly arranged at a position near the rear side of the lower end of the main support frame (201), and a plurality of rolling wheels (206) are rotatably arranged on the shaft body of the rolling shaft (205).

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