CN221850493U - A honeycomb paperboard punching device - Google Patents

Abstract

The utility model discloses a honeycomb cardboard punching device, which belongs to the field of cardboard punching technology, and aims to solve the problem that the operation is cumbersome when adjusting the punching position under the prior art, there is a lack of a mechanism to push the honeycomb cardboard, and the honeycomb cardboard needs to be pushed manually to move, which increases the workload of workers. It includes a workbench, a pushing component is installed on the side of the workbench, a side plate is installed on the end of the side of the workbench away from the pushing component, a cylinder is installed on the upper surface of the side plate, and a fixed plate is installed on the upper end of the cylinder. The fixed plate is L-shaped, and a plurality of electric telescopic rods are fixed on the vertical end of the fixed plate, and a slide groove is provided at the horizontal end of the fixed plate. The honeycomb cardboard punching device is convenient for fixing the honeycomb cardboard and improving the punching quality. When punching holes in different positions of the honeycomb cardboard, there is no need to manually push the honeycomb cardboard to move, which reduces the workload of workers. At the same time, when adjusting the punching position, there is no need to operate the bolts multiple times, and the operation is simple.

Description

A honeycomb paperboard punching device

Technical Field

The utility model belongs to the technical field of paperboard punching, and in particular relates to a honeycomb paperboard punching device.

Background Art

Honeycomb paperboard is made according to the principle of natural honeycomb structure. It is made by gluing corrugated paper into countless hollow three-dimensional regular hexagons to form an integral load-bearing member - paper core, and gluing surface paper on both sides to form a new type of sandwich structure environmentally friendly and energy-saving material. In order to facilitate the assembly of honeycomb paperboard, holes need to be opened in the paperboard during the processing.

Chinese patent CN219883394U discloses a cardboard punching device for carton and cardboard production, comprising supporting legs, a workbench is fixedly mounted on multiple groups of supporting legs, a hollow portion is penetrated through the workbench, an equipment rack is fixedly mounted on the workbench, an equipment box is fixedly mounted on the top surface of the equipment rack, and a driving mechanism is arranged inside the equipment box, a punching mechanism is arranged inside the equipment rack, and the punching mechanism and the hollow portion are distributed correspondingly up and down.

In the above patent, holes are punched in different positions of the honeycomb panel by installing the sleeves in different positions. When adjusting the position, the bolts need to be manually operated to release the fixation of the sleeves, and the bolts need to be retightened to fix the sleeves. The operation is relatively cumbersome, and the device lacks a mechanism for pushing the honeycomb paperboard. When punching holes in different positions of the honeycomb paperboard, the honeycomb paperboard needs to be manually pushed to move, which increases the workload of workers. Therefore, a technical measure is proposed to solve the problem that the operation is relatively cumbersome when adjusting the punching position, there is a lack of a mechanism for pushing the honeycomb paperboard, the honeycomb paperboard needs to be manually pushed to move, and the workload of workers is increased.

Utility Model Content

(1) Technical issues to be solved

In view of the shortcomings of the prior art, the purpose of the utility model is to provide a honeycomb cardboard punching device, aiming to solve the problems of the prior art that the operation is cumbersome when adjusting the punching position, there is a lack of a mechanism to push the honeycomb cardboard, and the honeycomb cardboard needs to be pushed manually to move, which increases the workload of workers.

(2) Technical solution

The utility model provides a honeycomb cardboard punching device, comprising a workbench, a pushing component is installed on the side of the workbench, a side plate is installed on the end of the workbench away from the pushing component, a cylinder is installed on the upper surface of the side plate, and a fixing plate is installed on the upper end of the cylinder, the fixing plate is L-shaped, and a multi-section electric telescopic rod is fixedly passed through the vertical end of the fixing plate, and a sliding groove is opened at the horizontal end of the fixing plate, and a sliding rod is installed in the sliding groove, and a push plate is slidably connected to the sliding groove and the sliding rod, and the side of the push plate is fixedly connected to the multi-section electric telescopic rod. Thanks to the arrangement of the multi-stage electric telescopic rod, the sliding rod, the sliding groove and the pushing plate, it is convenient to adjust the punching position, and there is no need to operate the bolts multiple times when adjusting the punching position, and the operation is simple. At the same time, thanks to the arrangement of the pushing component, it is convenient to fix the honeycomb cardboard, thereby ensuring that the punching position will not change, improving the punching quality, and at the same time, when punching holes in different positions of the honeycomb cardboard, there is no need to manually push the honeycomb cardboard to move, thereby reducing the workload of workers.

Furthermore, a limiting plate is installed on the side of the workbench away from the pushing component, and a plurality of groups of evenly distributed supporting legs are installed on the lower surface of the workbench. A through groove is opened on the workbench, and the through groove is below the fixed plate. A collection box is provided below the through groove. Thanks to the setting of the limiting plate, it is convenient to perform preliminary limiting of the honeycomb paperboard.

Furthermore, a sliding hole is opened at the lower end of the push plate, and the sliding rod is slidably connected to the sliding hole. Two groups of symmetrically distributed plug plates are provided at the lower end of the push plate. The coordinated use of the sliding rod ensures the limitation of the push plate and avoids the deflection of the push plate position.

Furthermore, the plug plate is movably connected to a replacement component via a socket, the lower end of the replacement component is connected to a motor box, a first motor is installed in the motor box, and the first motor is connected to a drill rod. Thanks to the setting of the replacement component, it is convenient to replace different drill rods and then drill different holes, thereby improving applicability.

Furthermore, the pushing assembly includes a first vertical plate and a second vertical plate, the sides of the first vertical plate and the second vertical plate are fixedly mounted on the side of the workbench, a second motor is fixedly mounted on the side of the first vertical plate, the second motor is connected to a screw, the screw rotates through the first vertical plate, the screw is rotatably connected to the second vertical plate, a sliding block is threaded through the screw, and the side of the sliding block is in contact with the side of the workbench. Thanks to the setting of the sliding block, by setting the sliding block in sliding contact with the side of the workbench, deflection of the sliding block during horizontal movement is avoided, thereby ensuring the horizontal state of the splint.

Furthermore, a mounting rod is threadedly connected to the upper end of the sliding block, a draw rod is slidably passed through the mounting rod, a clamp is connected to the lower end of the draw rod, the clamp is L-shaped, a cushion is provided on the side of the clamp facing the honeycomb paperboard, two groups of symmetrically distributed clamp rods are installed on the upper surface of the clamp, a vertical tube is clamped at the upper end of the clamp rod, the vertical tube is fixedly installed on the lower surface of the mounting rod, a first spring is installed inside the vertical tube, the upper end of the first spring is fixedly installed on the upper end of the vertical tube, and the lower end of the first spring is installed on the upper end of the clamp rod, thanks to the threaded movable connection between the sliding block and the mounting rod, it is convenient to replace the clamp, and then it is convenient to fix honeycomb paperboards of different thicknesses.

Furthermore, the replacement component includes a bottom block, the lower surface of the bottom block is fixedly connected to the upper surface of the motor box, a groove is provided at the center of the bottom block, a plurality of groups of symmetrically distributed circular holes are provided in the groove, the plurality of groups of circular holes are slidably connected with push rods and plug rods, the push rods and plug rods are connected with a pressure plate, the pressure plate is slidably fitted with the inside of the bottom block, a plurality of groups of second springs are installed on the side of the pressure plate away from the push rod and the plug rod, the other end of the second spring is fixedly installed on the inner side of the bottom block, the plug rod is slidably fitted with the socket, and the groove is slidably fitted with the plug plate.

(3) Beneficial effects

Compared with the prior art, the beneficial effects of the utility model are:

The utility model facilitates the fixing of the honeycomb paperboard by setting the pushing component, thereby ensuring that the punching position will not change, improving the punching quality, and at the same time, when punching holes at different positions of the honeycomb paperboard, it is not necessary to manually push the honeycomb paperboard to move, thereby reducing the workload of workers, and the draw rod is pulled upward and the clamping plate moves upward to release the draw rod, and the cushion layer set under the clamping plate is driven by the rebound of the first spring to press against the honeycomb paperboard to complete the fixing of the honeycomb paperboard, and the second motor is started to drive the clamping plate to move, and the movement of the clamping plate pushes the honeycomb paperboard to move, and when reaching the next drilling position, the second motor is turned off, and the punching action is repeated to punch holes, and the sliding block is movably connected to the thread of the mounting rod, so that the clamping plate is convenient to replace, and then the honeycomb paperboards of different thicknesses are convenient to fix;

By setting the replacement component, it is convenient to replace different drill rods and then drill different holes, which improves applicability. The push rod is pushed toward the direction close to the push plate to drive the plug rod to disengage from the plug hole in the plug plate, and the connection between the motor box and the push plate is released. Then, the push rod is pushed toward the direction close to the push plate to drive the plug rod to retract into the round hole, and then the groove is aligned with the plug plate and inserted. Under the rebound action of the second spring, the plug rod is driven to insert into the plug hole and the round hole on the side of the mounting block to complete the replacement.

The drilling position can be easily adjusted by setting a multi-stage electric telescopic rod, a sliding rod, a sliding groove and a push plate. When adjusting the drilling position, there is no need to operate the bolts multiple times. The operation is simple. The multi-section electric telescopic rod is started to drive the push plate to move, thereby driving the drill rod to move.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

Fig. 1 is a schematic diagram of the structure of the utility model;

FIG2 is a schematic diagram of the connection structure between the drill rod and the push plate;

Figure 3 is a schematic diagram of the internal structure of the motor box;

FIG4 is a schematic diagram of the three-dimensional structure of the push assembly;

FIG5 is a schematic diagram of the three-dimensional structure of the vertical pipe and the clamping rod in a state of being separated;

FIG. 6 is a schematic diagram of the three-dimensional structure of the replacement component in the separated state.

The marks in the attached drawings are: 1, workbench; 2, push assembly; 3, replacement assembly; 4, limit plate; 5, support leg; 6, collection box; 7, through slot; 8, slide bar; 9, slide slot; 10, push plate; 11, fixed plate; 12, multi-section electric telescopic rod; 13, cylinder; 14, side plate; 15, slide hole; 16, plug hole; 17, plug plate; 18, motor box; 19, drill rod; 20, first motor; 201, The first vertical plate; 202, the second motor; 203, the sliding block; 204, the clamping plate; 205, the vertical tube; 206, the pulling rod; 207, the mounting rod; 208, the cushion layer; 209, the screw rod; 210, the second vertical plate; 211, the first spring; 212, the clamping rod; 301, the bottom block; 302, the groove; 303, the round hole; 304, the second spring; 305, the pressure plate; 306, the insertion rod; 307, the push rod.

DETAILED DESCRIPTION

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

The specific embodiment is a honeycomb paperboard punching device, and its structural schematic diagram is shown in Figures 1, 2 and 3, including a workbench 1, a pushing component 2 is installed on the side of the workbench 1, a side plate 14 is installed on the end of the side of the workbench 1 away from the pushing component 2, a cylinder 13 is installed on the upper surface of the side plate 14, a fixing plate 11 is installed on the upper end of the cylinder 13, the fixing plate 11 is L-shaped, and a multi-section electric telescopic rod 12 is fixedly passed through the vertical end of the fixing plate 11, a slide groove 9 is opened at the horizontal end of the fixing plate 11, a slide rod 8 is installed in the slide groove 9, and a push plate 10 is slidably connected to the slide groove 9 and the slide rod 8, and the side of the push plate 10 is fixedly connected to the multi-section electric telescopic rod 12, a limiting plate 4 is installed on the side of the workbench 1 away from the pushing component 2, a plurality of groups of evenly distributed supporting legs 5 are installed on the lower surface of the workbench 1, a through groove 7 is opened on the workbench 1, the through groove 7 is below the fixed plate 11, a collecting box 6 is arranged below the through groove 7, a sliding hole 15 is opened at the lower end of the push plate 10, the sliding rod 8 is slidably connected to the sliding hole 15, and the push plate 10 is The lower end is provided with two groups of symmetrically distributed plug plates 17, and the plug plates 17 are provided with plug holes 16. The plug plates 17 are movably connected with the replacement components 3 through the plug holes 16. The lower end of the replacement components 3 is connected with a motor box 18, and a first motor 20 is installed in the motor box 18. The first motor 20 is connected with a drill rod 19. One side of the honeycomb paperboard to be punched is pressed against the limit plate 4, and then the honeycomb paperboard is fixed by the pushing component 2. Then, the position of the drill rod 19 is adjusted according to the position of the punching, and the multi-section electric telescopic rod 12 is started. The multi-section electric telescopic rod 12 is started to drive the push plate 10 to slide along the slide groove 9. The sliding of the push plate 10 drives the replacement components 3 to slide. The sliding of the replacement components 3 drives the motor box 18 and the drill rod 19 to slide. The first motor 20 is started to drive the drill rod 19 to rotate, and then the cylinder 13 is started to drive the fixed plate 11 to move downward. The downward movement of the fixed plate 11 drives the drill rod 19 to move downward to complete the drilling of the honeycomb paperboard. The debris generated by the drilling falls into the through groove 7 and then enters the collection box 6.

1, 4 and 5, the pushing assembly 2 includes a first vertical plate 201 and a second vertical plate 210. The first vertical plate 201 and the second vertical plate 210 are fixedly mounted on the side of the workbench 1. A second motor 202 is fixedly mounted on the side of the first vertical plate 201. The second motor 202 is connected to a screw 209. The screw 209 rotates through the first vertical plate 201. The screw 209 is rotatably connected to the second vertical plate 210. The screw 209 is threaded with a sliding block 203. The side of the sliding block 203 contacts the side of the workbench 1. The upper end of the sliding block 203 is threadedly connected to the The mounting rod 207 is connected, and the mounting rod 207 is slidably penetrated by the draw rod 206. The lower end of the draw rod 206 is connected to the clamping plate 204, and the clamping plate 204 is L-shaped. The side of the clamping plate 204 facing the honeycomb paperboard is provided with a cushion layer 208. Two groups of symmetrically distributed clamping rods 212 are installed on the upper surface of the clamping rod 212. The upper end of the clamping rod 212 is clamped with a vertical pipe 205. The vertical pipe 205 is fixedly installed on the lower surface of the mounting rod 207. A first spring 211 is installed inside the vertical pipe 205. The upper end of the first spring 211 is fixedly installed on the upper end of the vertical pipe 205. The lower end of the first spring 211 Installed at the upper end of the clamping rod 212, the honeycomb paperboard is fixed by using the pushing component 2. The specific method is to pull the drawing rod 206 upward, the drawing rod 206 moves upward to drive the clamping plate 204 to move upward, the clamping plate 204 moves upward to drive the clamping rod 212 to move upward, the clamping rod 212 moves upward to compress the first spring 211, and then one side of the honeycomb paperboard is moved to the bottom of the clamping plate 204 along the limiting plate 4, the drawing rod 206 is released, and the cushion layer 208 set under the clamping plate 204 is driven by the rebound of the first spring 211 to press against the honeycomb paperboard, thereby completing the fixing of the honeycomb paperboard. After the drilling is completed, the second motor 202 is started to drive the screw 209 to rotate, the screw 209 rotates to drive the sliding block 203 to move, the sliding block 203 moves to drive the mounting rod 207 to move (the sliding block 203 is movably connected to the threaded connection of the mounting rod 207, so that the clamping plate 204 can be replaced conveniently, and then the honeycomb paperboards of different thicknesses can be fixed conveniently), the mounting rod 207 moves to drive the clamping plate 204 to move, the clamping plate 204 moves to push the honeycomb paperboard to move, and when the next drilling position is reached, the second motor 202 is turned off, and the drilling action is repeated to perform drilling.

1 and 6, the replacement component 3 includes a bottom block 301, the lower surface of the bottom block 301 is fixedly connected to the upper surface of the motor box 18, a groove 302 is provided at the center of the bottom block 301, and a plurality of groups of symmetrically distributed circular holes 303 are provided in the groove 302, and the plurality of groups of circular holes 303 are slidably connected with push rods 307 and plug rods 306, and the push rods 307 and plug rods 306 are connected with a pressure plate 305, and the pressure plate 305 is slidably adapted to the inside of the bottom block 301, and a plurality of groups of second springs 304 are installed on one side of the pressure plate 305 away from the push rods 307 and plug rods 306, and the other end of the second spring 304 is fixedly installed on the inner side of the bottom block 301, the plug rod 306 is slidably adapted to the socket 16, and the groove 302 is slidably adapted to the plug plate 17. When the drill rod 19 needs to be replaced, the replacement component 3 is used to release the limit of the push plate 10, and the push rod 307 and plug rod 306 are moved toward the bottom block 301. The push rod 307 is pushed in the direction close to the push plate 10. The push rod 307 moves horizontally to push the pressure plate 305 to move horizontally. The pressure plate 305 moves horizontally to compress the second spring 304. The pressure plate 305 moves horizontally to drive the insertion rod 306 to slide along the circular hole 303. When the insertion rod 306 slides, it disengages from the socket 16 in the plug plate 17, and the connection state between the motor box 18 and the push plate 10 is released. The motor box 18, the connecting assembly, and the drill rod 19 are removed, and then the required drill rod 19 is replaced. The push rod 307 is pushed in the direction close to the push plate 10. The push rod 307 moves horizontally to drive the insertion rod 306 to retract into the circular hole 303, and then the groove 302 is aligned with the plug plate 17 and inserted, and the push rod 307 is released. Under the rebound action of the second spring 304, the insertion rod 306 is driven to be inserted into the socket 16 and the circular hole 303 on the side of the mounting block to complete the replacement.

Working principle: When using the device to punch holes in honeycomb paperboard, one side of the honeycomb paperboard to be punched is pressed against the limiting plate 4, and then the honeycomb paperboard is fixed by using the pushing component 2. The specific method is to pull the draw rod 206 upward, and the draw rod 206 moves upward to drive the clamping plate 204 to move upward, and the clamping plate 204 moves upward to drive the clamping rod 212 to move upward, and the clamping rod 212 moves upward to compress the first spring 211, and then one side of the honeycomb paperboard is moved along the limiting plate 4 to be directly below the clamping plate 204, and the draw rod 206 is released to drive the cushion layer 208 set under the clamping plate 204 to press against the honeycomb paperboard to complete the fixation of the honeycomb paperboard.

Then adjust the position of the drill rod 19 according to the position of the punching hole, start the multi-section electric telescopic rod 12, start the multi-section electric telescopic rod 12 to drive the push plate 10 to slide along the slide groove 9, the push plate 10 slides to drive the replacement component 3 to slide, the replacement component 3 slides to drive the motor box 18 and the drill rod 19 to slide, start the first motor 20 to drive the drill rod 19 to rotate, then start the cylinder 13 to drive the fixed plate 11 to move downward, the fixed plate 11 moves downward to drive the drill rod 19 to move downward to complete the drilling of the honeycomb paperboard, and the debris generated by the drilling falls into the through groove 7 and then enters the collection box 6. After the drilling is completed, the second motor 202 is started to drive the screw 209 to rotate, the screw 209 rotates to drive the sliding block 203 to move, the sliding block 203 moves to drive the installation rod 207 to move (the sliding block 203 is movably connected with the thread of the installation rod 207, so that the clamping plate 204 can be replaced, and the honeycomb paperboards of different thicknesses can be fixed conveniently), the installation rod 207 moves to drive the clamping plate 204 to move, and the clamping plate 204 moves to push the honeycomb paperboard to move. When the next drilling position is reached, the second motor 202 is turned off, and the drilling action is repeated to perform drilling;

When the drill rod 19 needs to be replaced, the replacement component 3 is used to release the limit of the push plate 10 and push the push rod 307 in the direction close to the push plate 10. The push rod 307 moves horizontally to push the pressure plate 305 to move horizontally. The pressure plate 305 moves horizontally to compress the second spring 304. The pressure plate 305 moves horizontally to drive the insertion rod 306 to slide along the circular hole 303. When the insertion rod 306 slides, it disengages from the socket 16 in the plug plate 17, and the connection state between the motor box 18 and the push plate 10 is released. The motor box 18, the connecting assembly, and the drill rod 19 are removed. Then the required drill rod 19 is replaced, and the push rod 307 is pushed in the direction close to the push plate 10. The push rod 307 moves horizontally to drive the insertion rod 306 to retract into the circular hole 303, and then align the groove 302 with the plug plate 17 and insert it, release the push rod 307, and drive the insertion rod 306 to insert into the socket 16 and the circular hole 303 on the side of the mounting block under the rebound action of the second spring 304 to complete the replacement.

Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (7)

1. A honeycomb paperboard punching device, comprising a workbench (1), characterized in that a pushing component (2) is installed on the side of the workbench (1), a side plate (14) is installed on the end of the workbench (1) away from the pushing component (2), a cylinder (13) is installed on the upper surface of the side plate (14), a fixing plate (11) is installed on the upper end of the cylinder (13), the fixing plate (11) is L-shaped, a multi-section electric telescopic rod (12) is fixedly penetrated at the vertical end of the fixing plate (11), a slide groove (9) is opened at the horizontal end of the fixing plate (11), a slide rod (8) is installed in the slide groove (9), the slide groove (9) and the slide rod (8) are slidably connected to a push plate (10), and the side of the push plate (10) is fixedly connected to the multi-section electric telescopic rod (12). 2. A honeycomb paperboard punching device according to claim 1, characterized in that a limiting plate (4) is installed on the side of the workbench (1) away from the pushing component (2), a plurality of groups of evenly distributed supporting legs (5) are installed on the lower surface of the workbench (1), a through groove (7) is opened on the workbench (1), the through groove (7) is below the fixing plate (11), and a collecting box (6) is provided below the through groove (7). 3. A honeycomb paperboard punching device according to claim 2, characterized in that a sliding hole (15) is provided at the lower end of the push plate (10), the sliding rod (8) is slidably connected to the sliding hole (15), and two groups of symmetrically distributed plug plates (17) are provided at the lower end of the push plate (10), and the plug plates (17) are provided with plug holes (16). 4. A honeycomb paperboard punching device according to claim 3, characterized in that the plug plate (17) is movably connected to a replacement component (3) through a socket (16), the lower end of the replacement component (3) is connected to a motor box (18), a first motor (20) is installed in the motor box (18), and the first motor (20) is connected to a drill rod (19). 5. A honeycomb paperboard punching device according to claim 4, characterized in that the pushing component (2) comprises a first vertical plate (201) and a second vertical plate (210), the first vertical plate (201) and the second vertical plate (210) are fixedly mounted on the side of the workbench (1), a second motor (202) is fixedly mounted on the side of the first vertical plate (201), the second motor (202) is connected to a screw rod (209), the screw rod (209) rotates through the first vertical plate (201), the screw rod (209) is rotatably connected to the second vertical plate (210), the screw rod (209) is threaded with a sliding block (203), and the side of the sliding block (203) contacts the side of the workbench (1). 6. A honeycomb paperboard punching device according to claim 5, characterized in that the upper end of the sliding block (203) is threadedly connected with a mounting rod (207), the mounting rod (207) is slidably penetrated by a draw rod (206), the lower end of the draw rod (206) is connected with a clamping plate (204), the clamping plate (204) is L-shaped, a cushion layer (208) is provided on the side of the clamping plate (204) facing the honeycomb paperboard, two groups of symmetrically distributed clamping rods (212) are installed on the upper surface of the clamping plate (204), the upper end of the clamping rod (212) is clamped with a vertical tube (205), the vertical tube (205) is fixedly installed on the lower surface of the mounting rod (207), a first spring (211) is installed inside the vertical tube (205), the upper end of the first spring (211) is fixedly installed on the upper end of the vertical tube (205), and the lower end of the first spring (211) is installed on the upper end of the clamping rod (212). 7. A honeycomb paperboard punching device according to claim 6, characterized in that the replacement component (3) comprises a bottom block (301), the lower surface of the bottom block (301) is fixedly connected to the upper surface of the motor box (18), a groove (302) is provided at the center of the bottom block (301), a plurality of groups of symmetrically distributed circular holes (303) are provided in the groove (302), a plurality of groups of the circular holes (303) are slidably connected to push rods (307) and insert rods (306), the push rods (307) and the insert rod (306) are connected with a pressure plate (305), and the pressure plate (305) is slidably fitted inside the bottom block (301). A plurality of groups of second springs (304) are installed on the side of the pressure plate (305) away from the push rod (307) and the insert rod (306), and the other end of the second spring (304) is fixedly installed on the inner side of the bottom block (301). The insert rod (306) is slidably fitted with the insertion hole (16), and the groove (302) is slidably fitted with the insert plate (17).