Waterproof roll stacking device

Abstract

The invention discloses a waterproof roll stacking device, and relates to the technical field of transportation or storage, the waterproof roll stacking device comprises an equipment main body, the bottom of the equipment main body is provided with a workbench, the periphery of the bottom of the workbench is welded with supporting legs, one side of the workbench is welded with a side plate, and the top surface of the workbench is provided with a conveying mechanism; a stacking and transferring mechanism is arranged on one side of the workbench. A driving motor in the equipment starts to operate, transmission is conducted through a transmission rod, so that a driving belt wheel is driven to rotate, in the rotating process of the driving belt wheel, power is applied to a transmission belt, the transmission belt stably conducts transmission, and at the other end of the transmission belt, a driven belt wheel rotates along with movement of the transmission belt at the same time; and the placing groove can provide a good placing foundation for the waterproof coiled materials, it is ensured that the waterproof coiled materials are kept in a stable state in the conveying process, the waterproof coiled materials can be sequentially conveyed into the stacking groove according to the sequence, and the stability of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transportation or storage, and in particular to a waterproof coiled material stacking device. Background Art

[0002] In the field of building waterproofing engineering, waterproofing membrane is an extremely critical material, which is widely used in roofs, basements, bridges, tunnels and other parts of various buildings to prevent water penetration and ensure the structural integrity and service life of the building. With the continued prosperity of the construction industry and the continuous improvement of people's requirements for building quality, the market demand for waterproofing membrane has shown a steady growth trend. This has prompted waterproofing membrane manufacturers to continuously expand production scale and improve production efficiency to meet the growing market demand.

[0003] The Chinese patent announcement number is CN219950398U, a plastic waterproof coil stacking device, the technical solution provided by the patent document is: including a bottom plate, the top of the bottom plate is fixedly installed with a lifting device for adjusting the height, the left side wall of the lifting device is hingedly installed with a stacking device for stacking coils, and the top of the bottom plate is located on the right side of the lifting device and is fixedly installed with a push rod for controlling movement and braking. The above case sets a motor, a sprocket and a motor to make the stacking device rise, and the cooperation of the baffle and the second hydraulic rod prevents the coil placed in the stacking device from falling out, which facilitates the dumping and unloading of the coil. The handle of the handbrake for controlling the brake is fixedly installed to achieve the effect of controlling the device to brake, which is convenient for operation and use, thereby reducing the working hours of stacking and improving the stacking efficiency.

[0004] In order to solve the problem that the existing device is troublesome and time-consuming in palletizing, and reduces the palletizing efficiency during stacking and transportation, the existing technology adopts the setting of clamping parts, which can fix the device at different heights, convenient for different use environments and operations, and the device can process the coils without triangular stacking. However, there may be problems such as equipment failure or coil damage due to unstable placement of coils or chaotic transportation, which leads to the problem of low stability of the equipment. Summary of the invention

[0005] The object of the present invention is to provide a waterproof coiled material stacking device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A waterproof coiled material stacking device comprises an equipment body, a workbench is arranged at the bottom of the equipment body, supporting legs are welded around the bottom of the workbench, and a side plate is welded on one side of the workbench.

[0007] A conveying mechanism is arranged on the top surface of the workbench, and a stacking and transferring mechanism is arranged on one side of the workbench.

[0008] The conveying mechanism comprises a protective shell, a transmission rod, a driving pulley, a driving motor, a transmission belt, a driven pulley, a conveyor belt, a placement groove, a stacking groove, a fixed plate, a cylinder, a push plate, a guide groove, an inclined plate, and a discharge port. The protective shell is fixedly installed on one side of the workbench, and both ends of one side of the protective shell are movably connected with a transmission rod, the surface of the transmission rod is fixedly connected with the driving pulley, the input end of the transmission rod is fixedly connected with the driving motor, the surface of the driving pulley is covered with a transmission belt, and the other end of the transmission belt is movably installed with a driven pulley, a conveyor belt is arranged inside the protective shell, a placement groove is opened on the surface of the conveyor belt, and a stacking groove is fixedly installed on the other side of the top of the workbench, a fixed plate is welded on the back of the stacking groove, the back of the fixed plate is fixedly connected with a cylinder, and the output end of the cylinder is fixedly connected with a push plate, the front end of the stacking groove is opened with a guide groove, the bottom of the guide groove is welded with an inclined plate, and a discharge port is opened and closed at the middle of the front side of the workbench.

[0009] A further improvement of the technical solution of the present invention is that: the number of the supporting legs is four, and an anti-slip block is welded at the bottom, a control screen is fixedly installed on the surface of the workbench, the supporting legs are used to bear the weight load of the workbench, and the anti-slip block enhances the friction between the supporting legs and the ground, ensuring that the workbench is always in a stable state, and the control screen is used to control the entire equipment.

[0010] A further improvement of the technical solution of the present invention is that: the protective shell covers both sides of the conveyor belt, the driven pulley is movably installed on the surface of the transmission rod at the other end of the protective shell, the protective shell is used to protect the conveyor belt, the driving motor cooperates with the transmission rod to drive the driving pulley, so that the driven pulley is transmitted through the transmission belt, thereby driving the roller in the conveyor belt to make the conveyor belt run.

[0011] A further improvement of the technical solution of the present invention is that the stacking groove is arranged at the left end of the conveyor belt and the placement groove, and the surface of the fixed plate is provided with a storage groove adapted to the push plate. The stacking groove is used to stack the waterproof membrane transported by the conveyor belt and the placement groove, and the fixed plate stores the push plate inside through the storage groove.

[0012] A further improvement of the technical solution of the present invention is that a telescopic rod is fixedly connected to the connection between the cylinder and the push plate, and a cylinder mounting frame is fixedly connected to the surface of the cylinder. The cylinder drives the push plate through the telescopic rod to push the waterproof membrane in the stacking groove to the inside of the guide groove.

[0013] A further improvement of the technical solution of the present invention is that an anti-slip plate is welded on the top of the guide groove, the discharge port is opened at the output end of the guide groove and is aligned with the inclined plate, the guide groove is used to stack the waterproof membrane to the inside of the stacking and transfer mechanism through the inclined plate and the discharge port, and the anti-slip plate is used to prevent the push plate from pushing the waterproof membrane out of the surface of the workbench.

[0014] A further improvement of the technical solution of the present invention is that the stacking and transfer mechanism includes a card slot, a card seat, a stacking box, a box entrance, a connecting column, a rotating seat and moving wheels, the card slot is arranged on both sides of the discharge port, the surface of the card slot is carded with the card seat, the surface of the card seat is fixedly connected with the stacking box, the top surface of the stacking box is provided with a box entrance, the bottom of the stacking box is fixedly connected with a connecting column, the bottom of the connecting column is movably equipped with a rotating seat, the bottom of the rotating seat is fixedly equipped with moving wheels, the card slot cooperates with the card seat to fix the stacking box on the surface of the workbench, and the stacking box is used to stack waterproof membranes through the discharge port.

[0015] A further improvement of the technical solution of the present invention is that: the card slot is fixedly installed on the surface of the workbench, the stacking box is attached to the surface of the workbench, the inlet and outlet are flush with each other, and the outlet cooperates with the inlet to transport the waterproof coil in the conveying mechanism to the interior of the stacking box.

[0016] A further improvement of the technical solution of the present invention is that a mounting seat is fixedly installed at the bottom of the rotating seat, and the moving wheels are movably installed on both sides of the mounting seat through connecting rods at the axis. The mounting seat provides a stable installation site for the moving wheels, which can ensure that the moving wheels remain in a stable state after installation, avoiding undesirable conditions such as looseness or displacement during equipment operation or movement. The moving wheels can flexibly rotate boxes through the rotating seat, which is convenient for transferring the waterproof membrane in the stacking box.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention starts the operation by setting a driving motor in the equipment, and transmits power through a transmission rod, thereby driving the driving pulley to rotate. During the rotation of the driving pulley, power is applied to the transmission belt to ensure stable transmission of the transmission belt. At the other end of the transmission belt, the driven pulley rotates simultaneously with the movement of the transmission belt, and the placement groove can provide a good placement foundation for the waterproof membrane, ensuring that the waterproof membrane remains in a stable state during the transportation process, and can be transported to the stacking groove in sequence. This orderly transportation method greatly improves the stability of the overall operation of the equipment, reduces equipment failures or membrane damage caused by unstable placement of the membrane or chaotic transportation, and improves the stability of the equipment.

[0018] 2. The present invention, by providing a stacking trough in conjunction with a cylinder and a push plate, enables the push plate to push the waterproof membrane in the stacking trough into the guide trough, and stacks the waterproof membrane into the stacking and transfer mechanism through the inclined plate and the discharge port, thereby effectively reducing the intensity and workload of manual labor. The equipment can complete the stacking task of a large number of membranes in a short time through efficient operation, thereby improving the stacking efficiency of the waterproof membranes.

[0019] 3. The present invention can be firmly installed on one side of the workbench by arranging a stacking box with a slot and a seat, and the height of the box inlet and the material outlet are flush, which facilitates the conveying mechanism to convey the waterproof membrane to the inside of the stacking box for stacking without hindrance. At the same time, the stacking box is also equipped with a connecting column and a rotating seat. When the stacking box is full of waterproof membranes, the moving wheels can easily drive the stacking box to move and transport with the help of the connection and support of the connecting column and the rotating seat, thereby improving the convenience and flexibility of the entire equipment in the stacking and transportation of membranes, making the entire production process smoother and more efficient, and improving the convenience of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a right view structural schematic diagram of the present invention; Figure 3 For the present invention Figure 2 A magnified view of the structure at center; Figure 4 For the present invention Figure 2 A magnified view of the structure at B in the middle; Figure 5 It is a front view structural schematic diagram of the present invention; Figure 6 It is a schematic diagram of the top structure of the present invention.

[0021] In the figure: 1. Equipment body; 11. Workbench; 12. Support legs; 13. Side panels; 2. Conveying mechanism; 21. Protective shell; 22. Transmission rod; 23. Driving pulley; 24. Driving motor; 25. Transmission belt; 26. Driven pulley; 27. Conveyor belt; 28. Placement slot; 29. ​​Stacking slot; 210. Fixed plate; 211. Cylinder; 212. Push plate; 213. Guide slot; 214. Inclined plate; 215. Discharge port; 3. Stacking and transfer mechanism; 31. Card slot; 32. Card seat; 33. Stacking box; 34. Box inlet; 35. Connecting column; 36. Rotating seat; 37. Moving wheel. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-6 , the present invention provides the following technical solutions: Embodiment 1: This embodiment provides a waterproof coil stacking device, including an equipment body 1, a workbench 11 is arranged at the bottom of the equipment body 1, support legs 12 are welded around the bottom of the workbench 11, a side plate 13 is welded on one side of the workbench 11, a conveying mechanism 2 is arranged on the top surface of the workbench 11, and a stacking and transferring mechanism 3 is arranged on one side of the workbench 11. The conveying mechanism 2 includes a protective shell 21, a transmission rod 22, a driving pulley 23, a driving motor 24, a transmission belt 25, a driven pulley 26, a conveyor belt 27, a placement groove 28, a stacking groove 29, a fixed plate 210, a cylinder 211, a push plate 212, a guide groove 213, an inclined plate 214, and a discharge port 215. The protective shell 21 is fixedly installed on one side of the workbench 11, and the transmission rods 22 are movably connected at both ends of one side of the protective shell 21, and the surface of the transmission rod 22 is fixedly connected to the driving pulley 23, and the input end of the transmission rod 22 is fixedly connected to the driving motor 24 The surface of the driving pulley 23 is covered with a transmission belt 25, and a driven pulley 26 is movably installed inside the other end of the transmission belt 25. A conveyor belt 27 is arranged inside the protective shell 21, and a placement groove 28 is provided on the surface of the conveyor belt 27. A stacking groove 29 is fixedly installed on the other side of the top of the workbench 11, and a fixing plate 210 is welded to the back of the stacking groove 29. A cylinder 211 is fixedly connected to the back of the fixing plate 210, and a push plate 212 is fixedly connected to the output end of the cylinder 211. A guide groove 213 is provided at the front end of the stacking groove 29, and an inclined plate 214 is welded to the bottom of the guide groove 213. A discharge port 215 is opened and closed in the middle of the front of the workbench 11. There are four supporting legs 12, and an anti-sliding block is welded at the bottom. A control screen is fixedly installed on the surface of the workbench 11. The supporting legs 12 are used to bear the weight load of the workbench 11, and the anti-sliding block enhances the friction between the supporting legs 12 and the ground, ensuring the workbench 11 The protective shell 21 covers both sides of the conveyor belt 27. The driven pulley 26 is movably mounted on the surface of the transmission rod 22 at the other end of the protective shell 21. The protective shell 21 is used to protect the conveyor belt 27. The driving motor 24 cooperates with the transmission rod 22 to drive the driving pulley 23, so that the driven pulley 26 is transmitted through the transmission belt 25, thereby driving the roller in the conveyor belt 27 to make the conveyor belt 27 run. The stacking groove 29 is set at the left end of the conveyor belt 27 and the placement groove 28. The surface of the fixed plate 210 is provided with a suitable push plate 212. The stacking groove 29 is used to stack the waterproofing coiled materials transported by the conveyor belt 27 and the placement groove 28. The fixed plate 210 stores the push plate 212 inside through the storage groove. The connection between the cylinder 211 and the push plate 212 is fixedly connected with a telescopic rod. The surface of the cylinder 211 is fixedly connected with a cylinder mounting frame. The cylinder 211 drives the push plate 212 through the telescopic rod to push the waterproofing coiled materials in the stacking groove 29 to the inside of the guide groove 213. The top of the guide groove 213 is welded with an anti-slip plate. The discharge port 215 is opened at the output end of the guide groove 213 and is aligned with the inclined plate 214.The guide groove 213 is used to stack the waterproofing coiled materials into the interior of the stacking and transfer mechanism 3 through the inclined plate 214 and the discharge port 215. The anti-slip plate is used to prevent the push plate 212 from pushing the waterproofing coiled materials out of the surface of the workbench 11. The driving motor 24 in the device starts to run and is transmitted through the transmission rod 22, thereby driving the driving pulley 23 to rotate. During the rotation of the driving pulley 23, power is applied to the transmission belt 25 to ensure stable transmission of the transmission belt 25. At the other end of the transmission belt 25, the driven pulley 26 rotates simultaneously with the movement of the transmission belt 25. The placement groove 28 can provide a good placement foundation for the waterproofing coiled materials, ensuring that the waterproofing coiled materials remain stable during the transportation process, and can be transported to the stacking groove 29 in sequence. This orderly transportation method greatly improves the stability of the overall operation of the equipment, reduces equipment failures or coil damage caused by unstable coil placement or chaotic transportation, and improves the stability of the equipment.

[0024] Embodiment 2: On the basis of embodiment 1, the present invention provides a technical solution: Preferably, the stacking and transferring mechanism 3 includes a card slot 31, a card seat 32, a stacking box 33, a box inlet 34, a connecting column 35, a rotating seat 36 and a moving wheel 37. The card slot 31 is arranged on both sides of the discharge port 215. The card seat 32 is connected to the surface of the card slot 31. The surface of the card seat 32 is fixedly connected to the stacking box 33. The top surface of the stacking box 33 is provided with a box inlet 34. The bottom of the stacking box 33 is fixedly connected to the connecting column 35. The bottom of the connecting column 35 is movably installed with a rotating seat 36. The bottom of the rotating seat 36 is fixedly installed with a moving wheel 37. The card slot 31 cooperates with the card seat 32 to stack The box 33 is fixed on the surface of the workbench 11, and the stacking box 33 is used to stack the waterproofing membrane through the discharge port 215. The card slot 31 is fixedly installed on the surface of the workbench 11, and the stacking box 33 is attached to the surface of the workbench 11. The box inlet 34 is flush with the height of the discharge port 215. The discharge port 215 cooperates with the box inlet 34 to transport the waterproofing membrane in the conveying mechanism 2 to the inside of the stacking box 33. A mounting seat is fixedly installed at the bottom of the rotating seat 36, and the moving wheel 37 is movably installed on both sides of the mounting seat through the connecting rod at the axis. The mounting seat provides a stable mounting position for the moving wheel 37, which can ensure that the moving wheel 37 remains in a stable state after installation to avoid the equipment If looseness or displacement occurs during operation or movement, the moving wheel 37 can flexibly rotate the box through the rotating seat 36, which is convenient for transferring the waterproof coiled materials in the stacking box 33. By setting the stacking slot 29 to cooperate with the cylinder 211 and the push plate 212, the push plate 212 pushes the waterproof coiled materials in the stacking slot 29 into the guide slot 213, and stacks the waterproof coiled materials into the stacking and transfer mechanism 3 through the inclined plate 214 and the discharge port 215, which effectively reduces the intensity and workload of manual labor. The equipment can complete the stacking task of a large number of coiled materials in a short time through efficient operation, thereby improving the stacking efficiency of the waterproof coiled materials. 1 and the card seat 32 can be firmly installed on one side of the workbench 11, and the height of the box inlet 34 and the discharge port 215 are flush, which facilitates the conveying mechanism 2 to convey the waterproof coiled material to the stacking box 33 for stacking without hindrance. At the same time, the stacking box 33 is also equipped with a connecting column 35 and a rotating seat 36. When the stacking box 33 is full of waterproof coiled materials, the moving wheel 37 can easily drive the stacking box 33 to move and transport with the help of the connection and support of the connecting column 35 and the rotating seat 36, which improves the convenience and flexibility of the entire equipment in the coiled material stacking and transportation links, makes the entire production process smoother and more efficient, and improves the convenience of the equipment.

[0025] The working principle of the waterproof coiled material stacking device will be described in detail below.

[0026] like Figure 1-6As shown, when using the device, the waterproofing coiled materials to be stacked are first placed in the placement groove 28, and the driving motor 24 in the device starts to run, and is transmitted through the transmission rod 22, thereby driving the driving pulley 23 to rotate. During the rotation of the driving pulley 23, power is applied to the transmission belt 25 to ensure stable transmission of the transmission belt 25. At the other end of the transmission belt 25, the driven pulley 26 rotates simultaneously with the movement of the transmission belt 25, and the placement groove 28 can provide a good placement foundation for the waterproofing coiled materials, ensuring that the waterproofing coiled materials remain in a stable state during the transportation process, and can be transported to the stacking groove 29 in sequence. This orderly transportation method greatly improves the stability of the overall operation of the equipment, reduces equipment failures or coil damage that may be caused by unstable placement of coiled materials or chaotic transportation, and improves the stability of the equipment. The stacking groove 29 cooperates with the cylinder 211 and the push plate 212, so that the push plate 212 pushes the waterproofing coiled materials in the stacking groove 29 into the guide groove 213 The stacking box 33 is equipped with a connecting column 35 and a rotating seat 36. When the stacking box 33 is full of waterproof coils, the moving wheel 37 can easily drive the stacking box 33 to move and transport with the help of the connection and support of the connecting column 35 and the rotating seat 36, thereby improving the convenience and flexibility of the entire equipment in the stacking and transportation links of the coils, making the entire production process smoother and more efficient, and improving the convenience of the equipment.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waterproofing coil stacking device, comprising a device body (1), characterized in that: A workbench (11) is provided at the bottom of the equipment body (1), support legs (12) are welded around the bottom of the workbench (11), and a side plate (13) is welded on one side of the workbench (11); A conveying mechanism (2) is provided on the top surface of the workbench (11), and a stacking and transporting mechanism (3) is provided on one side of the workbench (11); The conveying mechanism (2) comprises a protective shell (21), a transmission rod (22), a driving pulley (23), a driving motor (24), a transmission belt (25), a driven pulley (26), a conveyor belt (27), a placement groove (28), a stacking groove (29), a fixed plate (210), a cylinder (211), a push plate (212), a guide groove (213), an inclined plate (214), and a discharge port (215); the protective shell (21) is fixedly mounted on one side of the workbench (11); the transmission rod (22) is movably connected to both ends of one side of the protective shell (21); the surface of the transmission rod (22) is fixedly connected to the driving pulley (23); the input end of the transmission rod (22) is fixedly connected to the driving motor (24); the surface of the driving pulley (23) is covered with a transmission A belt (25) is provided, a driven pulley (26) is movably installed inside the other end of the transmission belt (25), a conveyor belt (27) is provided inside the protective shell (21), a placement groove (28) is provided on the surface of the conveyor belt (27), a stacking groove (29) is fixedly installed on the other side of the top of the workbench (11), a fixing plate (210) is welded to the back of the stacking groove (29), a cylinder (211) is fixedly connected to the back of the fixing plate (210), a push plate (212) is fixedly connected to the output end of the cylinder (211), a guide groove (213) is provided at the front end of the stacking groove (29), an inclined plate (214) is welded to the bottom of the guide groove (213), and a discharge port (215) is opened and closed in the middle of the front of the workbench (11).

2. A waterproof coiled material stacking device according to claim 1, characterized in that: The number of the supporting legs (12) is four, and an anti-sliding block is welded to the bottom, and a control screen is fixedly mounted on the surface of the workbench (11).

3. The waterproof coiled material stacking device according to claim 1, characterized in that: The protective shell (21) covers both sides of the conveyor belt (27), and the driven pulley (26) is movably mounted on the surface of the transmission rod (22) at the other end of the protective shell (21).

4. The waterproof coiled material stacking device according to claim 1, characterized in that: The stacking groove (29) is arranged at the left end of the conveyor belt (27) and the placement groove (28), and a storage groove matching the push plate (212) is provided on the surface of the fixing plate (210).

5. A waterproof coiled material stacking device according to claim 4, characterized in that: A telescopic rod is fixedly connected to the connection between the cylinder (211) and the push plate (212), and a cylinder mounting frame is fixedly connected to the surface of the cylinder (211).

6. The waterproof coiled material stacking device according to claim 1, characterized in that: An anti-drop plate is welded to the top of the guide groove (213), and the discharge port (215) is provided at the output end of the guide groove (213) and is aligned with the inclined plate (214).

7. A waterproof coiled material stacking device according to claim 6, characterized in that: The stacking and transfer mechanism (3) comprises a clamping slot (31), a clamping seat (32), a stacking box (33), a box entry opening (34), a connecting column (35), a rotating seat (36) and a moving wheel (37); the clamping slot (31) is arranged on both sides of the material discharge opening (215); the surface of the clamping slot (31) is clamped with the clamping seat (32); the surface of the clamping seat (32) is fixedly connected with the stacking box (33); the top surface of the stacking box (33) is provided with a box entry opening (34); the bottom of the stacking box (33) is fixedly connected with a connecting column (35); the bottom of the connecting column (35) is movably mounted with a rotating seat (36); and the bottom of the rotating seat (36) is fixedly mounted with a moving wheel (37).

8. The waterproof coiled material stacking device according to claim 7, characterized in that: The card slot (31) is fixedly mounted on the surface of the workbench (11), the stacking box (33) is attached to the surface of the workbench (11), and the box inlet (34) is flush with the discharge port (215).

9. The waterproof coiled material stacking device according to claim 7, characterized in that: A mounting seat is fixedly mounted on the bottom of the rotating seat (36), and the moving wheels (37) are movably mounted on both sides of the mounting seat via connecting rods at the axis.

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