A device for stacking steel sheets in parallel

Abstract

The utility model discloses a kind of stacking device for steel sheet up-down parallel, including supporting bottom block, the top surface of supporting bottom block is horizontally placed with paper box body, without manual watch manual each piece feeding, greatly save labor cost, improve the economic benefit of enterprise.Meanwhile, reduce the error and security risk brought by manual operation, improve the security and reliability of production.Each layer of steel sheet is accurately aligned, the maximum interlayer contact area, uniform friction distribution, so that the final pile body structure is stable, not easy to slip or collapse in subsequent transfer, reduce the security risk and product damage rate in production process.Through the accurate detection of steel sheet size and direction by scanner, and the positioning effect of limiting steel column, the cumulative error in the stacking process can be effectively eliminated, ensuring that each piece of steel sheet can be accurately aligned, achieving up-down parallel stacking, ensuring the long-term stability and perpendicularity of the pile body, and improving the quality of the product.

Description

Technical Field

[0001] This utility model relates to the field of steel sheet technology, specifically to a stacking device for steel sheets stacked vertically in parallel. Background Technology

[0002] In the manufacturing of products such as motors, transformers, and lithium batteries, the stacking and packaging of steel sheets, such as silicon steel sheets and battery electrodes, is a critical step in the production process. These products have extremely high requirements for the quality of steel sheet stacking, demanding that the steel sheets be stacked with extremely high parallelism and neatness. However, current common automated stacking methods have many problems and are difficult to meet actual production needs.

[0003] First, the steel sheets themselves have slight thickness variations or flatness errors. With multiple layers stacked, these minute errors accumulate and amplify, leading to tilting, misalignment, or even collapse of the entire stack. For example, in high-precision motor manufacturing, even if the steel sheet thickness error is only a few tenths of a millimeter, after dozens of layers, the stack deviation can reach several millimeters, severely affecting the motor's performance and quality. Second, traditional stacking methods are prone to hard impacts or friction when the steel sheets fall. The steel sheet surface is usually smooth and may be coated with functional coatings. Hard impacts and friction can easily scratch the steel sheet surface, damaging its smoothness and functional coatings, thus affecting the product's conductivity, insulation, and other properties. Taking lithium battery electrodes as an example, surface scratches can lead to internal short circuits in the battery, reducing battery safety and lifespan. Furthermore, for smooth-surfaced steel sheets, interlayer friction is low. During the movement or transportation of the stacked structure, the steel sheets are prone to slippage, resulting in poor stack stability. For example, in the production of transformers, if the steel sheet stack slips during transportation, it may loosen the internal structure of the transformer and affect its normal operation. Utility Model Content

[0004] The purpose of this invention is to provide a stacking device for parallel steel sheets, addressing the issue of minute thickness variations or flatness errors inherent in the steel sheets themselves, as mentioned in the background section. These minute errors accumulate and amplify after multiple layers are stacked, leading to tilting, misalignment, or even collapse of the entire stack. For example, in high-precision motor manufacturing, even if the steel sheet thickness error is only a few tenths of a millimeter, after dozens of layers, the stack deviation may reach several millimeters, severely affecting the motor's performance and quality. Secondly, traditional stacking methods are prone to hard collisions or friction when the steel sheets fall. The steel sheet surface is typically smooth and may be coated with functional coatings; hard collisions and friction easily scratch the surface, damaging its smoothness and functional coatings, thus affecting the product's conductivity, insulation, and other properties. Taking lithium battery electrodes as an example, surface scratches can lead to internal short circuits in the battery, reducing its safety and lifespan. Furthermore, for smooth-surfaced steel sheets, interlayer friction is low. During the movement or transportation of the stacked structure, the steel sheets are prone to slippage, resulting in poor stack stability. For example, in the production of transformers, if the steel sheet stack slips during transportation, it may loosen the internal structure of the transformer and affect its normal operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stacking device for parallel steel sheets, comprising a supporting base block, a paper box being horizontally placed on the top surface of the supporting base block, a limiting steel column being symmetrically threadedly fixed to the top surface of the supporting base block, a base plate being horizontally connected to the top of the supporting base block, a base pad being symmetrically fixed to the bottom surface of the base plate, a horizontal connecting rod being horizontally fixed to one side of the supporting base block, an end motor being fixed to one end of the horizontal connecting rod, a conveyor belt being horizontally fixed to the side of the horizontal connecting rod, a telescopic upright being vertically connected to the top surface of the horizontal connecting rod, and a telescopic connecting rod being horizontally fixed to one side of the telescopic upright... A detection host is fixedly installed on the top surface of the connecting rod. A vertical connecting rod is fixedly installed at the end of the telescopic connecting rod away from the telescopic upright. A scanner is fixedly installed vertically on the side of the vertical connecting rod. A side connecting plate is fixedly connected horizontally to one side of the vertical connecting rod. A steering motor is fixedly installed on the top surface of the side connecting plate. A connecting column is inserted into the bottom surface of the side connecting plate. An adsorption plate is fixedly installed at the bottom end of the connecting column. A top horizontal groove is horizontally opened on the top surface of the horizontal connecting rod. A transmission screw is horizontally inserted into the inner side of the top horizontal groove. Top screw holes are evenly opened on the top surface of the support base block. A bottom screw is fixedly installed at the bottom end of the limiting steel column. A bottom locking block is fixedly installed at the bottom end of the telescopic upright.

[0006] Preferably, the supporting base is L-shaped, and stacked paper materials are placed on the inner side of the paper box. There are four limiting steel columns, which are arranged in parallel to each other. The bottom end of the limiting steel column is connected to the top opening end of the top screw hole.

[0007] Preferably, the side of the base plate is positioned between the limiting steel columns, and there are four base pads, which are symmetrically fixed at the center of the bottom side of the base plate. One side of the horizontal connecting rod is horizontally fixed at the side of the supporting base block near the top.

[0008] Preferably, the output end of the end motor is horizontally fixedly connected to one end of the transmission screw, the transmission belt is horizontally located at one end away from the support base, a steel sheet structure is placed on the top of the transmission belt, the bottom end of the telescopic pole is connected to the top opening end of the top horizontal groove, and one end of the telescopic connecting rod is fixedly connected to the top side of the telescopic pole.

[0009] Preferably, the bottom surface of the detection host is connected to the top of the vertical connecting rod, and the detection host and the scanner are electrically connected to each other. The scanner is fixedly installed at the bottom side of the vertical connecting rod, one end of the side connecting plate is horizontally fixed at the bottom side of the vertical connecting rod, and the output end of the steering motor extends vertically downward and is fixedly connected to the top of the connecting column.

[0010] Preferably, there are multiple top screw holes, which are arranged in a cross shape on the top surface of the support base block. The bottom end of the bottom screw rod is threadedly fixed to the inner side of the top screw hole. The bottom end of the bottom clamping block is clamped to the inner side of the top horizontal groove, and the side screw hole of the bottom clamping block is threadedly connected to the outer side of the transmission screw rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This device, used for stacking steel sheets in parallel, employs paper to separate the steel sheets during daily use, avoiding hard impacts and relative sliding between them. This effectively protects the surface smoothness and functional coating of the steel sheets, reduces performance degradation caused by surface scratches, and improves product reliability and lifespan. The device automates the processes of steel sheet transport, detection, adsorption, stacking, and paper separation, significantly reducing manual intervention. It can complete the stacking of large quantities of steel sheets in a short time, significantly improving production efficiency and meeting the needs of large-scale production. A robotic arm automatically picks up the steel sheets, eliminating the need for manual supervision and feeding, greatly saving labor costs and improving the company's economic benefits. Simultaneously, it reduces errors and safety hazards caused by manual operation, enhancing production safety and reliability. Because each layer of steel sheets is precisely aligned, the interlayer contact area is maximized, and the friction distribution is uniform, resulting in a stable final stack structure that is less prone to slippage or collapse during subsequent transport, reducing safety risks and product damage rates during production. By using a scanner to accurately detect the size and orientation of the steel sheets, and with the positioning function of the limiting steel columns, the cumulative errors during the stacking process can be effectively eliminated, ensuring that each steel sheet can be accurately aligned and stacked in parallel. This guarantees the long-term stability and verticality of the stack and improves product quality. Attached Figure Description

[0012] Figure 1 This is a three-dimensional front view of the present invention; Figure 2 This is a three-dimensional bottom view of the present invention; Figure 3 This is a three-dimensional top view of the present invention; Figure 4 This is a schematic diagram of the overall three-dimensional back structure of this utility model; Figure 5 This is a schematic diagram of the overall separate connection structure of this utility model.

[0013] In the diagram: 1. Support base block; 2. Paper box body; 3. Limiting steel column; 4. Base plate; 5. Base pad block; 6. Horizontal connecting rod; 7. End motor; 8. Conveyor belt body; 9. Telescopic upright; 10. Telescopic connecting rod; 11. Detection host; 12. Vertical connecting rod; 13. Scanner; 14. Side connecting plate; 15. Steering motor; 16. Connecting column; 17. Adsorption plate; 18. Top horizontal groove; 19. Conveyor screw; 20. Top screw hole; 21. Bottom screw; 22. Bottom clamping block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1: like Figure 1-5 As shown, this utility model provides a technical solution: a stacking device for parallel steel sheets, including a support base 1, a paper box 2 horizontally placed on the top surface of the support base 1, and limit steel columns 3 symmetrically threadedly fixed to the top surface of the support base 1. The support base 1 is L-shaped, and stacked paper materials are placed on the inner side of the paper box 2. There are four limit steel columns 3, which are arranged parallel to each other. The bottom ends of the limit steel columns 3 are correspondingly connected to the top opening of the top screw hole 20. A bottom support plate 4 is horizontally connected to the top of the support base 1, and a bottom pad 5 is symmetrically fixed to the bottom surface of the bottom support plate 4. A horizontal connecting rod 6 is horizontally fixed to one side of the support base 1, and the side of the bottom support plate 4 is connected to the side position between the limit steel columns 3. There are four bottom pads 5. Four bottom pads 5 are symmetrically fixedly arranged at the center of the bottom side of the bottom support plate 4. One side of the horizontal connecting rod 6 is horizontally fixedly arranged at the side of the supporting base block 1 near the top. One end of the horizontal connecting rod 6 is fixedly arranged with an end motor 7. The side of the horizontal connecting rod 6 is horizontally fixedly arranged with a conveyor belt body 8. The top surface of the horizontal connecting rod 6 is vertically connected to a telescopic upright 9. One side of the telescopic upright 9 is horizontally fixedly arranged with a telescopic connecting rod 10. The output end of the end motor 7 is horizontally fixedly connected to one end of the transmission screw 19. The conveyor belt body 8 is horizontally arranged at one end away from the supporting base block 1. A steel sheet structure is placed on the top of the conveyor belt body 8. The bottom end of the telescopic upright 9 is connected to the top opening end of the top horizontal groove 18. One end of the telescopic connecting rod 10 is fixedly connected to the top side of the telescopic upright 9.

[0016] By using paper-spaced steel sheets, hard impacts and relative sliding between the steel sheets are avoided, effectively protecting the smoothness and functional coating of the steel sheet surface, and reducing the problem of product performance degradation caused by surface scratches.

[0017] Example 2:

[0018] like Figure 1-5As shown, this utility model provides a technical solution: a stacking device for parallel steel sheets, including a support base 1, a paper box 2 horizontally placed on the top surface of the support base 1, and limit steel columns 3 symmetrically threadedly fixed to the top surface of the support base 1. The support base 1 is L-shaped, and stacked paper materials are placed on the inner side of the paper box 2. There are four limit steel columns 3, which are arranged parallel to each other. The bottom ends of the limit steel columns 3 are correspondingly connected to the top opening end of the top screw hole 20. The top of the support base 1 is horizontally connected to a bottom support plate 4. A bottom pad 5 is symmetrically fixedly installed on the bottom surface. A horizontal connecting rod 6 is horizontally fixedly installed on one side of the supporting bottom block 1. The side of the bottom support plate 4 is connected to the side of the limiting steel column 3. There are four bottom pads 5, and the four bottom pads 5 are symmetrically fixedly installed at the center of the bottom side of the bottom surface of the bottom support plate 4. One side of the horizontal connecting rod 6 is horizontally fixedly installed on the side of the supporting bottom block 1 near the top. An end motor 7 is fixedly installed at one end of the horizontal connecting rod 6. A conveyor belt 8 is horizontally fixedly installed on the side of the horizontal connecting rod 6. A telescopic upright 9 is vertically connected to the top surface of the horizontal connecting rod 6. A telescopic connecting rod 10 is horizontally fixed on the side. The output end of the end motor 7 is horizontally fixedly connected to one end of the transmission screw 19. The transmission belt 8 is horizontally positioned at the end away from the support base block 1. A steel sheet structure is placed on the top of the transmission belt 8. The bottom end of the telescopic upright 9 is connected to the top opening of the top horizontal groove 18. One end of the telescopic connecting rod 10 is fixedly connected to the top side of the telescopic upright 9. A detection host 11 is fixedly mounted on the top surface of the telescopic connecting rod 10. A vertical connecting rod 12 is vertically fixed at the end of the telescopic connecting rod 10 away from the telescopic upright 9. A scanner 13 is vertically fixed on the side of the vertical connecting rod 12. A side connecting plate 14 is horizontally fixed to one side of the vertical connecting rod 12. A steering motor 15 is fixed to the top surface of the side connecting plate 14. The bottom surface of the detection host 11 is connected to the top of the vertical connecting rod 12. The detection host 11 and the scanner 13 are electrically connected to each other. The scanner 13 is fixed to the bottom of the side of the vertical connecting rod 12. One end of the side connecting plate 14 is horizontally fixed to the bottom of the side of the vertical connecting rod 12. The output end of the steering motor 15 extends vertically downward and is fixedly connected to the top of the connecting column 16.

[0019] By using the scanner 13 to accurately detect the size and orientation of the steel sheets, and the positioning function of the limiting steel column 3, the accumulated errors in the stacking process can be effectively eliminated, ensuring that each steel sheet can be accurately aligned and stacked in parallel, thus guaranteeing the long-term stability and verticality of the stack.

[0020] Example 3:

[0021] like Figure 1-5As shown, this utility model provides a technical solution: a stacking device for parallel steel sheets, including a support base 1, a paper box 2 horizontally placed on the top surface of the support base 1, and limit steel columns 3 symmetrically threadedly fixed to the top surface of the support base 1. The support base 1 is L-shaped, and stacked paper materials are placed on the inner side of the paper box 2. There are four limit steel columns 3, which are arranged parallel to each other. The bottom ends of the limit steel columns 3 are correspondingly connected to the top opening of the top screw hole 20. A bottom support plate 4 is horizontally connected to the top of the support base 1, and a bottom pad 5 is symmetrically fixed to the bottom surface of the bottom support plate 4. A horizontal connecting rod 6 is horizontally fixed to one side of the support base 1, and the side of the bottom support plate 4 is connected to the limit steel columns. Four bottom pads 5 are symmetrically fixed at the center of the bottom side of the bottom support plate 4. One side of the horizontal connecting rod 6 is horizontally fixed at the side of the supporting base block 1 near the top. One end of the horizontal connecting rod 6 is fixedly equipped with an end motor 7. A conveyor belt 8 is horizontally fixedly equipped at the side of the horizontal connecting rod 6. A telescopic pole 9 is vertically connected to the top surface of the horizontal connecting rod 6. A telescopic connecting rod 10 is horizontally fixedly equipped at one side of the telescopic pole 9. The output end of the end motor 7 is horizontally fixedly connected to one end of the transmission screw 19. The conveyor belt 8 is horizontally positioned at the end away from the supporting base block 1. A steel plate structure is placed on the top of the conveyor belt 8. The bottom end of the telescopic pole 9 is connected to the top horizontal groove 1. At the top opening end of the telescopic link 10, one end is fixedly connected to the top side of the telescopic upright 9. A detection host 11 is fixedly mounted on the top surface of the telescopic link 10. A vertical link 12 is vertically fixed at the end of the telescopic link 10 away from the telescopic upright 9. A scanner 13 is vertically fixed on the side of the vertical link 12. A side connecting plate 14 is horizontally fixedly connected to one side of the vertical link 12. A steering motor 15 is fixedly mounted on the top surface of the side connecting plate 14. The bottom surface of the detection host 11 is connected to the top of the vertical link 12, and the detection host 11 and the scanner 13 are electrically connected. The scanner 13 is fixedly mounted at the bottom side of the vertical link 12. One end of the side connecting plate 14 is horizontally fixed to the top of the vertical link 12. At the bottom side of position 2, the output end of the steering motor 15 extends vertically downward and is fixedly connected to the top of the connecting column 16. The bottom surface of the side connecting plate 14 is inserted into the connecting column 16, and the bottom end of the connecting column 16 is fixedly provided with an adsorption plate 17. The top surface of the horizontal connecting rod 6 is horizontally provided with a top horizontal groove 18, and the inner side of the top horizontal groove 18 is horizontally inserted with a transmission screw 19. The top surface of the support base block 1 is evenly provided with top screw holes 20. The bottom end of the limiting steel column 3 is fixedly provided with a bottom screw 21, and the bottom end of the telescopic upright 9 is fixedly provided with a bottom locking block 22. There are multiple top screw holes 20, and the multiple top screw holes 20 are arranged in a cross shape on the top surface of the support base block 1. The bottom end of the bottom screw 21 is threadedly fixedly connected to the inner side of the top screw hole 20.The bottom end of the bottom clamping block 22 is engaged with the inner side of the top horizontal groove 18, and the side screw hole of the bottom clamping block 22 is threadedly connected to the outer side of the transmission screw 19.

[0022] The automation of processes such as steel sheet transfer, detection, adsorption, stacking, and paper separation greatly reduces manual intervention and enables the stacking of a large number of steel sheets in a short time, significantly improving production efficiency and meeting the needs of large-scale production.

[0023] Working principle: The steel sheets to be stacked are placed on the conveyor belt 8, which is horizontally positioned at the end away from the supporting base block 1. The start motor 7 is activated, with its output end horizontally fixedly connected to one end of the conveyor screw 19, causing the screw 19 to rotate within the top horizontal groove 18. Since the bottom locking block 22 at the bottom of the telescopic pole 9 is threadedly connected to the outer side of the conveyor screw 19, and the bottom end of the bottom locking block 22 is engaged with the inner side of the top horizontal groove 18, the rotation of the conveyor screw 19 causes the telescopic pole 9 to move horizontally along the top horizontal groove 18, thereby allowing the conveyor belt 8 to transport the steel sheets to the designated point. During the movement of the telescopic pole 9, the telescopic connecting rod 10 on its side also moves. A detection host 11 is fixedly mounted on the top surface of the telescopic connecting rod 10, and a scanner 13 is mounted on the bottom end of the vertical connecting rod 12 fixed vertically at the end away from the telescopic pole 9. The detection host 11 and the scanner 13 are electrically connected to each other. When the telescopic pole 9 moves to the designated position above the steel sheet, the scanner 13 scans the steel sheet to detect its size and orientation, and transmits the data to the detection host 11. Based on the data from the scanner 13, the detection host 11 controls the telescopic pole 9 to continue moving, causing the adsorption plate 17 to move to the top center of the steel sheet. The adsorption plate 17 is fixedly connected to the output end of the steering motor 15 on the bottom surface of the side connecting plate 14 via the connecting column 16. Then, the telescopic pole 9 moves downward, causing the adsorption plate 17 to press tightly against the top surface of the steel sheet, fixing the steel sheet in place through adsorption. The telescopic pole 9 continues to move with the adsorbed and fixed steel sheet, transferring the steel sheet to the position between the pre-installed limiting steel columns 3. There are four limiting steel columns 3, arranged parallel to each other, and their bottom ends are threadedly connected to the inner side of the top screw hole 20 on the top surface of the support base block 1 via bottom screws 21, which can position the steel sheet and ensure that the steel sheet is stacked parallel to each other. During the steel sheet stacking process, after one steel sheet is stacked, a sheet of paper is taken out from the paper box 2 and placed between two adjacent steel sheets. The paper box 2 is placed on the top surface of the support base 1, with stacked paper materials placed on its inner side. This method achieves layered and spaced paper placement for isolation, avoiding hard impacts and relative sliding between the steel sheets. After a certain number of steel sheets have been stacked, the side of the base plate 4 is aligned with the side of the limiting steel columns 3, and four symmetrically fixed base pads 5 on the bottom surface of the base plate 4 provide stable support. The stacked steel sheets can be transferred as a whole through the base plate 4 for subsequent processing or storage operations.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stacking device for parallel steel sheets, comprising a supporting base (1), characterized in that: A paper box (2) is horizontally placed on the top surface of the support base (1). A limit steel column (3) is symmetrically threaded and fixed to the top surface of the support base (1). A bottom support plate (4) is horizontally connected to the top of the support base (1). A bottom pad block (5) is symmetrically fixed to the bottom surface of the bottom support plate (4). A horizontal connecting rod (6) is horizontally fixed to one side of the support base (1). An end motor (7) is fixed to one end of the horizontal connecting rod (6). A conveyor belt (8) is horizontally fixed to the side of the horizontal connecting rod (6). A telescopic upright (9) is vertically connected to the top surface of the horizontal connecting rod (6). A telescopic connecting rod (10) is horizontally fixed to one side of the telescopic upright (9). A detection host (11) is fixed to the top surface of the telescopic connecting rod (10). The telescopic connecting rod (10) is located away from the telescopic upright (9). A vertical connecting rod (12) is fixedly installed at one end of the vertical connecting rod (12). A scanner (13) is fixedly installed on the side of the vertical connecting rod (12). A side connecting plate (14) is fixedly connected to one side of the vertical connecting rod (12). A steering motor (15) is fixedly installed on the top surface of the side connecting plate (14). A connecting column (16) is inserted into the bottom surface of the side connecting plate (14). An adsorption plate (17) is fixedly installed at the bottom end of the connecting column (16). A top horizontal groove (18) is opened horizontally on the top surface of the horizontal connecting rod (6). A transmission screw (19) is inserted horizontally on the inner side of the top horizontal groove (18). Top screw holes (20) are evenly opened on the top surface of the support base block (1). A bottom screw (21) is fixedly installed at the bottom end of the limiting steel column (3). A bottom clamping block (22) is fixedly installed at the bottom end of the telescopic upright (9).

2. The stacking device for parallel steel sheets according to claim 1, characterized in that: The support base (1) is L-shaped, and stacked paper materials are placed on the inner side of the paper box (2). There are four limiting steel columns (3), and the four limiting steel columns (3) are arranged in parallel to each other. The bottom end of the limiting steel column (3) is connected to the top opening end of the top screw hole (20).

3. The stacking device for parallel steel sheets according to claim 1, characterized in that: The side of the bottom support plate (4) is connected to the side of the limiting steel column (3). There are four bottom pads (5), and the four bottom pads (5) are symmetrically fixed at the center of the bottom side of the bottom of the bottom support plate (4). One side of the horizontal connecting rod (6) is horizontally fixed at the side of the supporting block (1) near the top.

4. A stacking device for parallel steel sheets according to claim 1, characterized in that: The output end of the end motor (7) is horizontally fixedly connected to one end of the transmission screw (19), the transmission belt (8) is horizontally located at one end away from the support block (1), a steel sheet structure is placed on the top of the transmission belt (8), the bottom end of the telescopic pole (9) is connected to the top opening end of the top horizontal groove (18), and one end of the telescopic connecting rod (10) is fixedly connected to the top side of the telescopic pole (9).

5. A stacking device for parallel steel sheets according to claim 1, characterized in that: The bottom surface of the detection host (11) is connected to the top of the vertical connecting rod (12), and the detection host (11) and the scanner (13) are electrically connected to each other. The scanner (13) is fixedly installed at the bottom side of the vertical connecting rod (12). One end of the side connecting plate (14) is horizontally fixed at the bottom side of the vertical connecting rod (12), and the output end of the steering motor (15) extends vertically downward and is fixedly connected to the top of the connecting column (16).

6. A stacking device for parallel steel sheets according to claim 1, characterized in that: The number of top screw holes (20) is multiple, and the multiple top screw holes (20) are arranged in a cross shape on the top surface of the support base block (1). The bottom end of the bottom screw rod (21) is threaded and fixedly connected to the inner side of the top screw hole (20). The bottom end of the bottom clamping block (22) is clamped and connected to the inner side of the top horizontal groove (18), and the side screw hole of the bottom clamping block (22) is threaded and connected to the outer side of the transmission screw rod (19).

Images