A slitting machine for plastic packaging film production and processing

By coordinating the design of clamping, slitting, and adjusting components, the problem of difficult cutting position adjustment in traditional plastic packaging film slitting machines has been solved, enabling continuous cutting and multi-specification production, thereby improving production efficiency and product quality.

CN224394237UActive Publication Date: 2026-06-23CHENGDU XINJINXING PRINTING CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGDU XINJINXING PRINTING CO LTD
Filing Date
2025-08-14
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Traditional plastic packaging film slitting machines rely on manual adjustment of the cutting position, which is inefficient and difficult to guarantee accuracy. They cannot achieve continuous cutting, and the cutting specifications are fixed, making it difficult to meet the diverse needs of the market.

Method used

By employing the coordinated work of clamping, slitting, and adjusting components, and through the cooperation of components such as limit frames, partitions, mounting bases, mounting shafts, and inclined plates, the slitting blade can be flexibly adjusted and continuously cut. Combined with the design of springs and gears, it ensures precise control of the cutting position and diversified production.

Benefits of technology

It achieves stable clamping and precise cutting of plastic packaging film rolls, reduces manual intervention, improves slitting efficiency, meets different cutting needs, produces products of various specifications, and improves production efficiency and product quality.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224394237U_ABST
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Patent Text Reader

Abstract

The utility model belongs to plastic packaging film processing equipment technical field relates to a kind of slitting machine for plastic packaging film production and processing, by clamping component, slitting component and adjusting component composition. Clamping component is used to clamp and rotate plastic packaging film coiled material, slitting component is responsible for cutting coiled material, adjusting component can adjust slitting component position to realize continuous cutting and reciprocating movement. Slitting component is convenient to dismount and maintain by unique structure, and adjusting component is controlled slitting position and spacing by the synergy of multiple components. The slitting machine effectively solves the problem of inconvenient cutting position adjustment and single cutting specification during the slitting process of plastic packaging film, improves slitting efficiency and product diversity.
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Description

Technical Field

[0001] This application relates to the technical field of plastic packaging film processing equipment, specifically to a slitting machine for plastic packaging film production and processing. Background Technology

[0002] Slitting is a crucial step in the production and processing of plastic packaging film. Traditional plastic packaging film slitting machines have several shortcomings. On the one hand, adjusting the cutting position usually relies on manual operation, which is inefficient and difficult to guarantee accuracy, making continuous cutting impossible and resulting in low production efficiency. On the other hand, the fixed cutting specifications make it difficult to meet the diverse market demands for different sizes of plastic packaging film.

[0003] Therefore, there is an urgent need for a plastic packaging film slitting machine that can flexibly adjust the cutting position, achieve continuous cutting, and produce products of various specifications, in order to improve production efficiency and product quality and meet the diversified needs of the market. Summary of the Invention

[0004] To address the aforementioned technical problems, this application solves the issues of difficulty in flexibly adjusting the cutting position during the slitting of plastic packaging films, the inability to achieve continuous cutting, and the limitation of cutting specifications.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a slitting machine for producing and processing plastic packaging film, comprising a clamping assembly, a slitting assembly, and an adjusting assembly. The slitting assembly and the adjusting assembly are fixedly installed on the clamping assembly. The clamping assembly is used for clamping and rotating the plastic packaging film roll, the slitting assembly is used for cutting the roll, and the adjusting assembly is used for adjusting the position of the slitting assembly.

[0006] The slitting assembly includes a mounting post, an external connecting post, a fastening plate, a support plate, and a slitting blade. The slitting blade is mounted on the support plate, and the end of the support plate away from the slitting blade slides with the fastening plate through a protrusion. The external connecting post is fixedly connected to the fastening plate, and the external connecting post is provided with a slot for the mounting post to be inserted. The mounting post controls the slitting blade's approach and distance from the packaging film roll.

[0007] The adjustment assembly includes a limit frame, partition plates, mounting base, mounting shaft, and inclined plate. The limit frame is fixedly mounted on the clamping assembly. Multiple partition plates are provided on the limit frame. The mounting base is mounted on the limit frame and is symmetrical to the mounting positions of the partition plates. The mounting shaft passes through the through hole of the mounting base, and one end of the mounting shaft is fixedly connected to the inclined plate.

[0008] Preferably, the clamping assembly includes a body, a clamping disk, a limiting block, and a protective plate. The body includes a base plate and a motor. The clamping disk is rotatably mounted on the body and connected to the output end of the motor inside the body. The clamping disk is provided with a long shaft for supporting the packaging film roll, and the long shaft is provided with a protective plate for preventing the roll from falling off after cutting.

[0009] Preferably, the slitting assembly includes a slitting motor, a threaded rod, and a transverse frame. The slitting motor is fixedly mounted on the clamping assembly, and the output end of the slitting motor is fixedly connected to the threaded rod. The threaded rod is rotatably mounted on the clamping assembly. The transverse frame is provided with two threaded grooves and a sliding groove. The two threaded grooves of the transverse frame are respectively threadedly connected to a threaded rod, and the sliding groove of the transverse frame is slidably connected to the mounting column.

[0010] Preferably, the mounting column includes a lower slider, a middle sliding shaft, an upper slider, and an inner connecting column. The lower slider and the upper slider are rectangular blocks. The lower slider slides horizontally on the sliding groove of the transverse frame. The middle sliding shaft is a cylindrical structure. The two ends of the middle sliding shaft are fixedly connected to the lower slider and 2403, respectively. The inner connecting column is fixedly installed at the end of the upper slider away from the middle sliding shaft. The shape of the inner connecting column matches the shape of the outer connecting column sliding groove and is a polygonal structure.

[0011] Preferably, the adjusting assembly includes a spring and a gear, the gear being rotatably mounted on the mounting base, the spring being sleeved on the mounting shaft, and the two ends of the spring being fixedly connected to the mounting shaft and the gear, respectively.

[0012] Preferably, the adjustment assembly includes an electric cylinder, a horizontal sliding plate, and a fixed plate. The electric cylinder and the fixed plate are fixedly mounted on the clamping assembly. The horizontal sliding plate is fixedly connected to the output end of the electric cylinder. The horizontal sliding plate is provided with teeth and is slidably mounted on the slide grooves on multiple mounting seats. The teeth on the horizontal sliding plate mesh with gears.

[0013] The technical solution provided in this application has the following advantages compared with the prior art:

[0014] 1: This application achieves stable clamping, precise cutting, and flexible adjustment of the cutting position of plastic packaging film rolls through the coordinated work of the clamping component, the cutting component, and the adjustment component. It can automatically complete continuous cutting, reduce manual intervention, and improve cutting efficiency.

[0015] 2: The slitting assembly of this application adopts a design with a thickness difference between the slitting blade mounting part and the support plate, which can avoid frictional wear of the roll material by the support plate; the support plate and the fastening plate are slidably engaged by the sliding groove and fixed with bolts, which facilitates disassembly and maintenance and ensures the stable operation of the slitting assembly.

[0016] 3: The adjustment component of this application, through the cooperation of components such as the limiting frame, the partition plate, the mounting base, the mounting shaft, and the inclined plate, can push the mounting column to slide laterally during the slitting process, change the cutting position of the slitting blade, realize continuous cutting of the roll material, and meet different cutting needs.

[0017] 4: This application incorporates springs and gears in the adjustment assembly, utilizing spring force to control the rotation and reset of the inclined plate, ensuring that the mounting column moves in the set manner, enabling the slitting blade to accurately change the cutting position and improving cutting accuracy.

[0018] 5: This application uses an adjustment assembly consisting of an electric cylinder, a horizontal slide plate, and a fixed plate to change the tilt direction of the inclined plate, so that the slitting blade returns to its initial position and reciprocates; at the same time, by adjusting the position of the mounting base and the partition plate, the cutting interval of the slitting blade can be controlled each time, producing products of different specifications and improving product diversity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a schematic diagram of the slitting component of this application;

[0021] Figure 3 This is a schematic diagram of the support plate of this application;

[0022] Figure 4 This is a schematic diagram of the structure for installing the column in this application;

[0023] Figure 5 This is a schematic diagram of the structure of the adjustment component in this application;

[0024] Figure 6 for Figure 5 Enlarged view of the local structure at point A in the middle.

[0025] In the diagram: 100-Clamping assembly; 101-Machine body; 102-Clamping plate; 103-Limiting block; 104-Protective plate; 200-Sliding assembly; 201-Sliding motor; 202-Threaded rod; 203-Transverse frame; 204-Mounting column; 2041-Lower slide block; 2042-Middle slide shaft; 2043-Upper slide block; 2044-Inner connecting column; 205-Outer connecting column; 206-Snap-fit ​​plate; 207-Support plate; 208-Sliding blade; 300-Adjusting assembly; 301-Electric cylinder; 302-Transverse slide plate; 303-Fixing plate; 304-Limiting frame; 305-Separator plate; 306-Mounting base; 307-Gear; 308-Spring; 309-Mounting shaft; 310-Slant plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] like Figures 1 to 6 As shown, a slitting machine for producing and processing plastic packaging film includes a clamping assembly 100, a slitting assembly 200, and an adjusting assembly 300. The slitting assembly 200 and the adjusting assembly 300 are fixedly installed on the clamping assembly 100. The clamping assembly 100 is used to clamp and rotate the plastic packaging film roll. The slitting assembly 200 is used to cut the roll. The adjusting assembly 300 is used to adjust the position of the slitting assembly 200. The adjusting assembly 300 drives the slitting assembly 200 to move a certain distance after each cut, thereby performing continuous cutting. The adjusting assembly 300 also controls the direction of movement of the slitting assembly 200, allowing it to reciprocate.

[0029] like Figure 1 and Figure 2 As shown, the slitting assembly 200 includes a mounting post 204, an external connecting post 205, a fastening plate 206, a support plate 207, and a slitting blade 208. The slitting blade 208 is mounted on the support plate 207. The thickness of the mounting portion of the slitting blade 208 is greater than the thickness of the connection between the support plate 207 and the slitting blade 208, thereby preventing the support plate 207 from affecting the roll material during cutting, such as causing frictional wear. The end of the support plate 207 away from the slitting blade 208 slides in a groove of the fastening plate 206 via a protrusion. The protrusion of the support plate 207 slides vertically on the groove of the fastening plate 206, facilitating the disassembly and maintenance of the support plate 207. Installation is achieved by fixing the support plate 207 to the fastening plate 206 with bolts. The outer connecting post 205 is fixedly connected to the fastening plate 206. The outer connecting post 205 is provided with a groove for the insertion of the mounting post 204. The fastening plate 206 is located at the lower end of the outer connecting post 205. The groove of the fastening plate 206 is hollow. The longer connection distance stabilizes the stability of the related parts on the fastening plate 206, ensuring stable cutting. The movement of the mounting post 204 controls the approach and distance of the slitting blade 208 to the packaging film roll, as well as the cutting position of the slitting blade 208 on the roll.

[0030] like Figure 1 , Figure 5 and Figure 6As shown, the adjustment assembly 300 includes a limiting frame 304, a partition plate 305, a mounting base 306, a mounting shaft 309, and an inclined plate 310. The limiting frame 304 is fixedly mounted on the bottom plate of the protective plate 104 and the body 101. The limiting frame 304 is a rectangular frame. Multiple partition plates 305 are provided on the limiting frame 304. Each partition plate 305 contacts only one side of the limiting frame 304. The mounting base 306 is mounted on the limiting frame 304. The mounting positions of the mounting base 306 and the partition plates 305 are symmetrical and are respectively located on both sides of the limiting frame 304. The mounting shaft 309 passes through the through hole of the mounting base 306 and is rotatably connected to the mounting base 306. The lower end of the mounting shaft 309 is fixedly connected to the inclined plate 310.

[0031] like Figure 1 As shown, the clamping assembly 100 includes a body 101, a clamping disk 102, a limiting block 103, and a protective plate 104. The body 101 includes a base plate and a motor. The clamping disk 102 is rotatably mounted on the body 101 and connected to the output end of the motor inside the body 101. The clamping disk 102 is provided with a long shaft for supporting the packaging film roll, and the long shaft is provided with a protective plate 104 for preventing the roll from falling off after cutting.

[0032] The packaging film roll is held by the clamping plate 102, and the clamping plate 102 and the roll are driven to rotate on the long shaft by the motor of the machine body 101. Then, the slitting blade 208 is controlled to contact and penetrate the roll to cut the roll. After cutting, the roll moves away from the clamping plate 102 under the action of inertia, thereby blocking the roll by the limit block 103 to prevent it from falling off. Furthermore, a protective plate 1040 is set directly below the long shaft to protect the slitting motor 201 and other parts, so as to prevent the waste generated during cutting from affecting them.

[0033] like Figure 1 As shown, the slitting assembly 200 includes a slitting motor 201, a threaded rod 202, and a transverse frame 203. The slitting motor 201 is fixedly mounted on the base plate of the machine body 101. The output end of the slitting motor 201 is fixedly connected to the threaded rod 202. The threaded rod 202 is rotatably mounted on the clamping assembly 100. The transverse frame 203 is provided with two threaded grooves and one sliding groove. The two threaded grooves of the transverse frame 203 are respectively threadedly connected to one of the threaded rods 202. The sliding groove of the transverse frame 203 is slidably connected to the mounting post 204.

[0034] In use, the two slitting motors 201 are started by controlling the electronic control system. The slitting motors 201 drive the threaded rods 202 to rotate on the base plate of the machine body 101. The threaded rods 202 on both sides drive the threaded groove of the transverse frame 203 through the threads, so that the transverse frame 203 moves on the threaded rods 202 in the direction of approaching or moving away from the roll material, so as to realize the slitting of the roll material by the slitting blade 208.

[0035] like Figure 4 As shown, the mounting post 204 includes a lower slider 2041, a middle slider 2042, an upper slider 2043, and an inner connecting post 2044. The lower slider 2041 and the upper slider 2043 are rectangular blocks. The lower slider 2041 slides horizontally on the groove of the transverse frame 203. The middle slider 2042 is a cylindrical structure. The two ends of the middle slider 2042 are fixedly connected to the lower slider 2041 and the upper slider 2043, respectively. The inner connecting post 2044 is fixedly installed at the end of the upper slider 2043 away from the middle slider 2042. The shape of the inner connecting post 2044 matches the shape of the groove of the outer connecting post 205 and is a polygonal structure.

[0036] The lower slider 2041 is located at the lower end, the upper slider 20433 is located at the upper end, and the middle sliding shaft 2042 is located in the middle. When the transverse frame 203 moves, the sliding groove of the transverse frame 203 drives the mounting column 204 to move closer to or away from the roll material. During the movement, the middle sliding shaft 2042 will contact the inclined plate 310. Due to the inclination of the inclined plate 310, the middle sliding shaft 2042 is pushed, and then the mounting column 204 drives the upper fastening plate 206, support plate 207, and slitting blade 208 to move. The mounting column 204 slides laterally on the sliding groove of the transverse frame 203, that is, it moves from the end where the limit block 103 is located to the end where the clamping plate 102 is located, thereby realizing the change of the cutting position of the slitting blade 208, which can continuously cut the roll material.

[0037] Specifically, when the mounting column 204 moves toward the roll material, the upper slider 2043 on the mounting column 204 first contacts the partition plate 305, and then contacts the inner inclined surface of the inclined plate 310. Thus, under the restriction of the partition plate 305, the mounting column 204 cannot move laterally, thereby the transverse frame 203 drives the mounting column 204 to push the inclined plate 310 and the mounting shaft 309 to rotate.

[0038] After the slitting blade 208 cuts, as it moves away from the roll material, the upper slider 2043, under the action of the partition plate 305, pushes the inclined plate 310 to rotate in the opposite direction. When the elastic force of the spring 308 reaches a certain level, and the upper slider 2043 is no longer in contact with the partition plate 305, the inclined plate 310 can no longer be pushed after losing the restriction of the partition plate 305. Thus, under the action of the inclined surface of the inclined plate 310, the upper slider 2043 is pushed to move laterally, and the mounting post 204 passes over a partition plate 305 to proceed to the next cutting channel.

[0039] like Figure 6As shown, the adjusting assembly 300 includes a spring 308 and a gear 307. The gear 307 is rotatably mounted on the mounting base 306, and the spring 308 is sleeved on the mounting shaft 309. The two ends of the spring 308 are fixedly connected to the mounting shaft 309 and the gear 307, respectively. The rotation of the mounting shaft 309 and the inclined plate 310 is controlled by the elastic force of the spring 308. When the middle sliding shaft 2042 moves towards the direction of the roll material, the middle sliding shaft 2042 will first push the inclined plate 310, causing the inclined plate 310 to drive the mounting shaft 309 to rotate on the mounting base 306. Due to the restriction of the gear 307, the mounting shaft 309 twists the spring 308. Thus, after the middle sliding shaft 2042 moves out of the inclined plate 310, the inclined plate 310 is reset under the action of the spring 308, restoring its tilted state. When the middle sliding shaft 2042 moves away from the roll material, it contacts the inclined plate 310. Due to the elastic force of the spring 308, the middle sliding shaft 2042 first pushes the inclined plate 310 and the mounting shaft 309 to rotate on the mounting base 306. As a result, the mounting shaft 309 twists the spring 308. When the elastic force of the spring 308 reaches a certain level, the middle sliding shaft 2042 can no longer push the inclined plate 310. Under the influence of the inclined surface of the inclined plate 310, it slides laterally along the inclined surface. That is, the middle sliding shaft 2042 pushes the lower slider 2041 to slide on the slide groove of the transverse frame 203, so that the slitting blade 208 on the mounting column 204 changes the cutting position. The middle sliding shaft 2042 moves between two adjacent partition plates 305. That is, the middle sliding shaft 2042 slides laterally on the inclined surface of the inclined plate 310 once and passes over one partition plate 305.

[0040] like Figure 5 and Figure 6 As shown, the adjustment assembly 300 includes an electric cylinder 301, a horizontal slide plate 302, and a fixing plate 303. The electric cylinder 301 and the fixing plate 303 are fixedly mounted on the clamping assembly 100. The horizontal slide plate 302 is fixedly connected to the output end of the electric cylinder 301. The horizontal slide plate 302 is provided with teeth. The horizontal slide plate 302 is slidably mounted on the slide grooves on multiple mounting seats 306. The teeth on the horizontal slide plate 302 mesh with gears 307.

[0041] The mounting base 306 is provided with a protruding rod. By controlling the installation position of the protruding rod on the fixing plate 303, the position of the mounting base 306 can be changed, thereby adjusting the position between the multiple inclined plates 310. In conjunction with the installation position of the partition plate 305 on the fixing plate 303, the distance that the mounting column 204 moves each time can be controlled, thereby controlling the spacing of the cutting blade 208 cutting the roll material each time, forming products of different specifications.

[0042] In use, the electric cylinder 301 is started by controlling the electric control system. The electric cylinder 301 drives the horizontal slide plate 302 to slide on the slide groove of the mounting base 306. As a result, the gear 307 driven by the gear of the mounting base 306 rotates on the mounting base 306. Then, the gear 307 twists the spring 308. The elastic force of the spring 308 drives the mounting shaft 309 to rotate on the mounting base 306. The mounting shaft 309 then drives the inclined plate 310 to change its tilt direction, thereby changing the lateral movement of the mounting column 204. This allows the slitting blade 208 to return to its initial position, that is, the slitting blade 208 moves from the end where the limit block 103 is located to the end where the clamping plate 102 is located. Then, after changing the tilt direction of the inclined plate 310, the slitting blade 208 moves from the end where the clamping plate 102 is located to the end where the limit block 103 is located.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A slitting machine for producing and processing plastic packaging film, characterized in that, It includes a clamping assembly (100), a slitting assembly (200), and an adjusting assembly (300). The slitting assembly (200) and the adjusting assembly (300) are fixedly mounted on the clamping assembly (100). The clamping assembly (100) is used to clamp and rotate the plastic packaging film roll, the slitting assembly (200) is used to cut the roll, and the adjusting assembly (300) is used to adjust the position of the slitting assembly (200). The slitting assembly (200) includes a mounting post (204), an external connecting post (205), a fastening plate (206), a support plate (207), and a slitting blade (208). The slitting blade (208) is mounted on the support plate (207). The end of the support plate (207) away from the slitting blade (208) is slidably engaged with the groove of the fastening plate (206) through a protrusion. The external connecting post (205) is fixedly connected to the fastening plate (206). The external connecting post (205) is provided with a groove for the mounting post (204) to be inserted. The mounting post (204) controls the approach and distance of the slitting blade (208) from the packaging film roll. The adjustment assembly (300) includes a limiting frame (304), a partition plate (305), a mounting base (306), a mounting shaft (309), and an inclined plate (310). The limiting frame (304) is fixedly mounted on the clamping assembly (100). Multiple partition plates (305) are provided on the limiting frame (304). The mounting base (306) is mounted on the limiting frame (304) and is symmetrical to the mounting positions of the partition plates (305). The mounting shaft (309) passes through the through hole of the mounting base (306), and one end of the mounting shaft (309) is fixedly connected to the inclined plate (310).

2. The slitting machine for producing and processing plastic packaging film according to claim 1, characterized in that, The clamping assembly (100) includes a body (101), a clamping plate (102), a limiting block (103), and a protective plate (104). The body (101) includes a base plate and a motor. The clamping plate (102) is rotatably mounted on the body (101) and connected to the output end of the motor inside the body (101). The clamping plate (102) is provided with a long shaft for supporting the packaging film roll, and the long shaft is provided with a protective plate (104) for preventing the roll from falling off after cutting.

3. The slitting machine for plastic packaging film production and processing according to claim 1, characterized in that, The slitting assembly (200) includes a slitting motor (201), a threaded rod (202), and a transverse frame (203). The slitting motor (201) is fixedly mounted on the clamping assembly (100). The output end of the slitting motor (201) is fixedly connected to the threaded rod (202). The threaded rod (202) is rotatably mounted on the clamping assembly (100). The transverse frame (203) is provided with two threaded grooves and one sliding groove. The two threaded grooves of the transverse frame (203) are threadedly connected to one threaded rod (202) respectively. The sliding groove of the transverse frame (203) is slidably connected to the mounting column (204).

4. A slitting machine for producing and processing plastic packaging film according to claim 1, characterized in that, The mounting post (204) includes a lower slider (2041), a middle slider (2042), an upper slider (2043), and an inner connecting post (2044). The lower slider (2041) and the upper slider (2043) are rectangular blocks. The lower slider (2041) slides horizontally on the groove of the transverse frame (203). The middle slider (2042) is a cylindrical structure. The two ends of the middle slider (2042) are fixedly connected to the lower slider (2041) and the upper slider (2043) respectively. The inner connecting post (2044) is fixedly set at the end of the upper slider (2043) away from the middle slider (2042). The shape of the inner connecting post (2044) matches the shape of the groove of the outer connecting post (205) and is a polygonal structure.

5. A slitting machine for producing and processing plastic packaging film according to claim 1, characterized in that, The adjustment assembly (300) includes a spring (308) and a gear (307). The gear (307) is rotatably mounted on the mounting base (306), and the spring (308) is sleeved on the mounting shaft (309). The two ends of the spring (308) are fixedly connected to the mounting shaft (309) and the gear (307) respectively.

6. A slitting machine for producing and processing plastic packaging film according to claim 5, characterized in that, The adjustment assembly (300) includes an electric cylinder (301), a horizontal slide plate (302), and a fixing plate (303). The electric cylinder (301) and the fixing plate (303) are fixedly mounted on the clamping assembly (100). The horizontal slide plate (302) is fixedly connected to the output end of the electric cylinder (301). The horizontal slide plate (302) is provided with teeth. The horizontal slide plate (302) is slidably mounted on the slide grooves on multiple mounting seats (306). The teeth on the horizontal slide plate (302) mesh with gears (307).