Automatic page cutting and conveying integrated production equipment for inner pages of workbooks

Abstract

The application provides a work notebook inner page automatic paging, cutting and conveying integrated production equipment, which comprises a cutting indentation structure, a conveying belt, a control box, a paging machine and a limiting flow guide frame. The conveying belt is embedded in the right side of the cutting indentation structure. The lower end of the limiting flow guide frame is fixedly installed on the upper end of the conveying belt. The rear end of the paging machine is fixedly connected with the front end of the control box. The indentation structure is arranged to pre-press a guide indentation before cutting, so as to provide an accurate cutting path for a cutting edge and effectively inhibit the generation of cutting burrs. The cutting structure is arranged to decompose a first impact into two smaller impacts through stepped punching. A primary cutting edge completes positioning and preliminary separation, and a fine cutting edge completes final cutting. The division of labor is clear, the cutting precision is further improved, the damage to the cutting edge caused by each impact is reduced, and the tool life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of automatic page-splitting and cutting technology for exercise book pages, specifically to an integrated production equipment for automatic page-splitting, cutting, and conveying of exercise book pages. Background Technology

[0002] An integrated production line for automatic page separation, cutting, and conveying of exercise book pages refers to an integrated industrial device that automatically separates stacked exercise book pages one by one, precisely cuts them to set dimensions, and continuously conveys them to the next process. It typically consists of three parts working together: a page separation mechanism, a cutting module, and a conveying system. The page separation mechanism uses friction or pneumatic principles to separate stacked papers into individual sheets at high speed, avoiding overlapping or paper jams. The cutting module uses servo control and precision blades to achieve die-free cutting, including cross-cutting and longitudinal cutting, ensuring dimensional accuracy. The conveyor belt smoothly transports the cut individual pages to the binding or collating stage. However, it has the following drawbacks: 1. If the cutting force is not concentrated enough during the paper fiber cutting process, the fibers will be pulled apart instead of being cut neatly, which will form rough edges at the cut edge, affecting the appearance quality and feel of the inner pages of the exercise book. 2. The blade completes the entire cut in one stroke. The blade edge bears all the cutting resistance at the moment of contact with the paper. The impact force is concentrated, which leads to rapid wear of the blade edge. The blade needs to be replaced or sharpened frequently, which affects production efficiency. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides an integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages, thus solving the problem.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: an integrated production equipment for automatic page separation, cutting and conveying of exercise book inner pages, the structure of which includes a cutting and creasing structure, a conveyor belt, a control box, a page separator and a limiting guide frame; The conveyor belt is embedded on the right side of the cutting and indentation structure; The lower end of the limiting guide frame is fixedly installed on the upper end of the conveyor belt side; The rear end of the piecing machine is fixedly connected to the front end of the control box; The left side of the piecing machine is fixedly connected to the right side of the limiting guide frame; The cutting and indentation structure includes a driver, a cutting structure, a buffer support frame, an indentation structure, an outer casing, and a belt conveyor frame; The lower end of the driver is movably connected to the upper end of the cutting structure; The cutting structure is installed inside the outer casing; The lower end of the buffer support frame is fixedly connected to the upper end of the belt conveyor frame, and the upper end of the buffer support frame is fixedly connected to the lower end of the cutting structure. The indentation structure is installed inside the outer casing; The belt conveyor frame is fixedly installed inside the outer casing.

[0007] Preferably, the indentation structure includes a motor, a belt, and a pressure roller structure; The motor is movably connected to the pressure roller structure via a belt; There is a gap between the pressure roller structure and the belt conveyor frame, which ranges from 50% to 70% of the paper thickness.

[0008] Preferably, the pressure roller structure includes a rotating shaft, a belt toothed ring groove, an indentation ring frame, and an indentation protrusion. The rotating shaft and the belt toothed ring groove are an integrated structure; The outer ring of the rotating shaft is fixedly connected to the inner ring of the indentation ring frame by bolts; The indentation ring frame and the indentation protrusion are an integrated structure; The indentation ring frame has a circular structure, and the inner diameter of the circular structure is consistent with the maximum outer diameter of the rotating shaft. The indentation ring frame has rotating shafts on both sides, and the rotating shafts are embedded in the inner wall of the outer casing and are movably connected. The outer ring of the indentation protrusion has a blunt, rounded edge.

[0009] Preferably, the cutting structure includes a cutting shear frame structure and a limiting support frame structure; The front end of the cutting shear frame structure is fixedly connected to the rear end of the limiting support frame structure; The lower end of the limiting support frame structure is fixedly connected to the upper end of the belt conveyor frame.

[0010] Preferably, the cutter frame structure includes an auxiliary slide groove, a locking post, an inner slide cavity, a first pre-compression spring, a movable seat, a primary cutter sliding structure, a fine cutter, and a through hole; The movable seat is equipped with an auxiliary sliding groove; The locking post and the sliding structure of the initial cutting blade are an integrated structure; The initial cutting blade sliding structure is located inside the inner sliding cavity and is slidably connected; the inner sliding cavity and the movable seat are an integrated structure. The upper end of the locking pin is fixedly connected to the lower end of the first pre-compression spring; The lower end of the movable seat is fixedly connected to the upper end of the precision cutting blade by bolts; The cutting edge angle of the precision cutting knife is in the range of 15°-25°; The movable base and the through hole are an integrated structure; The difference between the cutting edge height of the primary cutter sliding structure and the cutting edge height of the finishing cutter is 0.5mm-1.5mm.

[0011] Preferably, the initial cutter sliding structure includes an auxiliary inner slider, a sliding support, a connecting rod, and an initial cutter; The auxiliary inner slider is welded to the front and rear ends of the sliding support; The lower end of the sliding support is welded to the upper end of the connecting rod; The lower end of the connecting rod is embedded and installed on the upper end of the primary cutter; The cutting edge angle of the primary cutter is in the range of 25°-35°.

[0012] Preferably, the limiting support frame structure includes a connecting plate, an upper connecting rod, a second preload spring, a lower connecting rod, a support plate, a fixed support, and a limiting slide plate; The lower end of the connecting support plate is welded to the upper end of the upper connecting rod; The second preload spring is located between the lower connecting rod and the limiting slide; The lower end of the upper connecting rod is fixedly connected to the upper end of the limiting slide; The outer ring of the limiting slide is in contact with the inner wall of the lower connecting rod; There is a gap between the limiting slide and the connecting rod; The lower end of the lower connecting rod is fixedly installed on the upper end of the support plate; The lower right end of the support plate is fixedly connected to the upper end of the fixed support by bolts.

[0013] (III) Beneficial Effects

[0014] This invention provides an integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages. It has the following beneficial effects: 1. This invention, by setting an indentation structure, pre-presses out guide indentations before cutting, providing a precise cutting path for the cutting edge and effectively suppressing the generation of burrs. 2. By setting up a cutting structure, the present invention decomposes a single impact into two smaller impacts in a stepped punching process. The initial cutting blade completes the positioning and preliminary separation, while the fine cutting blade completes the final cutting. The division of labor is clear, which further improves the cutting accuracy and reduces the damage to the cutting edge caused by each impact, thus extending the tool life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages according to the present invention; Figure 2 This is a front view of the cutting and indentation structure of the present invention; Figure 3 This is a front view of the indentation structure of the present invention; Figure 4 This is a side view of the pressure roller structure of the present invention. Figure 5 This is a side view of the cutting structure of the present invention; Figure 6 This is a side view of the cutting scissor frame structure of the present invention; Figure 7 This is a side view of the sliding structure of the initial cutting blade of the present invention. Figure 8 This is a schematic diagram of the limiting support frame structure of the present invention.

[0016] In the diagram: Cutting and creased structure-1, conveyor belt-2, control box-3, collating machine-4, limit guide frame-5, driver-11, cutting structure-12, buffer support frame-13, creased structure-14, outer casing-15, belt conveyor frame-16, motor-141, belt-142, pressure roller structure-143, rotating shaft-B1, belt toothed ring groove-B2, creased ring frame-B3, creased ridge-B4, cutting shear frame structure-121, limit support frame structure-122, auxiliary... Sliding groove-C1, locking post-C2, inner sliding cavity-C3, first preload spring-C4, moving seat-C5, initial cutter sliding structure-C6, fine cutter-C7, through hole-C8, auxiliary inner slider-C61, sliding support-C62, connecting rod-C63, initial cutter-C64, connecting support plate-1221, upper connecting rod-1222, second preload spring-1223, lower connecting rod-1224, support plate-1225, fixed support-1226, limiting slide plate-1227. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] As attached Figure 1 To be continued Figure 8 As shown: Example 1

[0019] This invention provides an integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages. The structure of the integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages includes a cutting and creasing structure 1, a conveyor belt 2, a control box 3, a page splitting machine 4, and a limiting guide frame 5. The conveyor belt 2 is embedded on the right side of the cutting and indentation structure 1; The lower end of the limiting guide frame 5 is fixedly installed on the upper end of the side of the conveyor belt 2; The rear end of the piecing machine 4 is fixedly connected to the front end of the control box 3; The left side of the piecing machine 4 is fixedly connected to the right side of the limiting guide frame 5; The collating machine 4 is equipped with a "paper feeding wheel" or "page separating wheel". When the machine is started, the paper feeding wheel rotates and moves only the bottom sheet of material forward through friction. There is a certain gap between the lower end face of the limiting guide frame 5 and the conveyor belt 2. After the paper feeding wheel separates the pages of the workbook, the paper is conveyed by the conveyor belt 2. The limiting guide frame 5 at the upper end of the conveyor belt 2 can prevent the pages of the workbook from being affected by external forces and from falling off the conveyor belt 2. The cutting and indentation structure 1 includes a driver 11, a cutting structure 12, a buffer support frame 13, an indentation structure 14, an outer casing 15, and a belt conveyor frame 16. The lower end of the driver 11 is movably connected to the upper end of the cutting structure 12; The cutting structure 12 is installed inside the outer casing 15; The lower end of the buffer support frame 13 is fixedly connected to the upper end of the belt conveyor frame 16, and the upper end of the buffer support frame 13 is fixedly connected to the lower end of the cutting structure 12. The indentation structure 14 is installed inside the outer casing 15; The belt conveyor frame 16 is fixedly installed inside the outer casing 15; When the driver 11 is running, it can press the cutting structure 12 downward, thereby causing the cutting structure 12 to move down. The buffer support frame 13 is equipped with a return spring, which can support and reset the cutting structure 12. Through the interaction between the driver 11 and the buffer support frame 13, the cutting structure 12 can perform up and down reciprocating motion.

[0020] The indentation structure 14 includes a motor 141, a belt 142, and a pressure roller structure 143; The motor 141 is movably connected to the pressure roller structure 143 via a belt 142; There is a gap between the pressure roller structure 143 and the belt conveyor frame 16, which is 50%-70% of the paper thickness. This gap allows the pressure roller structure 143 to press clear indentations into the paper when it is driven to roll by the motor 141.

[0021] The pressure roller structure 143 includes a rotating shaft B1, a belt toothed ring groove B2, an indentation ring frame B3, and an indentation protrusion B4. The rotating shaft B1 and the belt toothed ring groove B2 are an integrated structure; The outer ring of the rotating shaft B1 and the inner ring of the indentation ring frame B3 are fixedly connected by bolts; The indentation ring frame B3 and the indentation protrusion B4 are an integrated structure; The indentation ring frame B3 has a circular structure, and the inner diameter of the circular structure is consistent with the maximum outer diameter of the rotating shaft B1; The indentation ring frame B3 has rotating shafts on both sides, and the rotating shafts are embedded in the inner wall of the outer casing 15 and are movably connected. The outer ring of the indentation protrusion B4 has a blunt, rounded edge. The belt toothed ring groove B2 is used to assemble with the belt 142, so that when the motor 141 rotates, it drives the belt 142 to rotate, and the belt 142 can make the rotating shaft B1 rotate. The indentation protrusion B4 can pre-press a micro guide groove on the paper surface. During subsequent cutting, the cutting edge can cut along the guide groove. The guide groove plays a guiding and positioning role for the cutting edge of the cutting structure 12, effectively suppressing the micro-slippage of paper fibers at the moment of cutting.

[0022] The specific workflow is as follows: In this invention, when page-separating and cutting the inner pages of a workbook, the control box 3 controls the start of the page-separating machine 4, the cutting and creasing structure 1, and the conveyor belt 2. The inner pages of the workbook that need to be paged are then placed to the right of the page-separating machine 4. The page-separating machine 4 processes the inner pages of the workbook, avoiding the phenomenon of two pages overlapping. The paged inner pages are then conveyed by the conveyor belt 2 to the area below the creasing structure 14. The motor 141 rotates, driving the belt toothed ring groove B2 to rotate via the belt 142, thereby causing the rotating shaft B1 to rotate within the outer casing 15. The rotating shaft B1 drives the creasing protrusion B4 on the creasing ring frame B3 to rotate, and the creasing protrusion B4 creasing the paper. The creasing protrusion B4 can pre-press a microscopic guide groove on the paper surface. The guide groove guides and positions the cutting edge of the cutting structure 12, effectively suppressing the microscopic slippage of the paper fibers at the moment of cutting. Then, the cutting structure 12 cuts the paper into the required size.

[0023] Example 2

[0024] The specific embodiments of the present invention are as follows: The cutting and indentation structure 1 includes a driver 11, a cutting structure 12, a buffer support frame 13, an indentation structure 14, an outer casing 15, and a belt conveyor frame 16; The lower end of the driver 11 is movably connected to the upper end of the cutting structure 12; The cutting structure 12 is installed inside the outer casing 15; The lower end of the buffer support frame 13 is fixedly connected to the upper end of the belt conveyor frame 16, and the upper end of the buffer support frame 13 is fixedly connected to the lower end of the cutting structure 12. The indentation structure 14 is installed inside the outer casing 15; The belt conveyor frame 16 is fixedly installed inside the outer casing 15; When the driver 11 is running, it can press the cutting structure 12 downward, thereby causing the cutting structure 12 to move down. The buffer support frame 13 is equipped with a return spring, which can support and reset the cutting structure 12. Through the interaction between the driver 11 and the buffer support frame 13, the cutting structure 12 can perform up and down reciprocating motion.

[0025] The cutting structure 12 includes a cutting shear frame structure 121 and a limiting support frame structure 122. The front end of the cutting shear frame structure 121 is fixedly connected to the rear end of the limiting support frame structure 122; The lower end of the limiting support frame structure 122 is fixedly connected to the upper end of the belt conveyor frame 16.

[0026] The cutter frame structure 121 includes an auxiliary slide groove C1, a locking post C2, an inner slide cavity C3, a first pre-compression spring C4, a moving seat C5, a primary cutter sliding structure C6, a fine cutter C7, and a through hole C8. The movable seat C5 is provided with an auxiliary sliding groove C1; The locking post C2 and the initial cutting blade sliding structure C6 are an integrated structure; The initial cutting blade sliding structure C6 is located inside the inner sliding cavity C3 and is slidably connected. The inner sliding cavity C3 and the movable seat C5 are an integrated structure. The upper end of the locking post C2 is fixedly connected to the lower end of the first pre-compression spring C4; The lower end of the movable seat C5 is fixedly connected to the upper end of the precision cutting blade C7 by bolts; The cutting edge angle of the precision cutting blade C7 ranges from 15° to 25°. The movable base C5 and the through hole C8 are an integrated structure; The difference in cutting edge height between the primary cutting blade sliding structure C6 and the finishing cutting blade C7 is 0.5mm-1.5mm; There is a height difference between the cutting edge of the initial cutting blade sliding structure C6 and the cutting edge of the finishing blade C7, and the cutting edge of the finishing blade C7 is higher than that of the initial cutting blade sliding structure C6, causing the initial cutting blade sliding structure C6 to cut the inner pages of the exercise book first; the first pre-compression spring C4 can enable the initial cutting blade structure C8 to be reset.

[0027] The initial cutter sliding structure C6 includes an auxiliary inner slider C61, a sliding support C62, a connecting rod C63, and an initial cutter C64. The auxiliary inner slider C61 is welded to the front and rear ends of the sliding support C62; The lower end of the sliding support C62 is welded to the upper end of the connecting rod C63; The lower end of the connecting rod C63 is embedded and installed on the upper end of the primary cutter C64; The cutting edge angle of the C64 primary cutter is in the range of 25°-35°.

[0028] The limiting support frame structure 122 includes a connecting support plate 1221, an upper connecting rod 1222, a second preload spring 1223, a lower connecting rod 1224, a support plate 1225, a fixed support 1226, and a limiting slide plate 1227. The lower end of the connecting support plate 1221 is welded to the upper end of the upper connecting rod 1222; The second preload spring 1223 is located between the lower connecting rod 1224 and the limiting slide 1227; The lower end of the upper connecting rod 1222 is fixedly connected to the upper end of the limiting slide 1227; The outer ring of the limiting slide 1227 is in contact with the inner wall of the lower connecting rod 1224; There is a gap between the limiting slide 1227 and the connecting rod 1224; The lower end of the lower connecting rod 1224 is fixedly installed on the upper end of the support plate 1225; The lower right end of the support plate 1225 is fixedly connected to the upper end of the fixed support 1226 by bolts; The maximum distance between the upper connecting rod 1222 and the lower connecting rod 1224 is 30%-50% of the thickness of the inner pages of the exercise book. The upper connecting rod 1222 and the lower connecting rod 1224 cooperate with each other to limit the cutting depth of the initial cutter C64. The elastic coefficient of the second preload spring 1223 is greater than the sum of the elastic coefficient of the first preload spring C4 and the downward cutting force of the initial cutter C64. As a result, when the initial cutter C64 cuts downward, the second preload spring 1223 will not be compressed and deformed when the sliding support C62 drives the upper connecting rod 1222 to move downward and before it reaches the lower connecting rod 1224.

[0029] The specific workflow is as follows: When cutting the inner pages of a workbook, the present invention activates the driver 11. Through the interaction of the driver 11, the limiting support structure 122, and the first pre-compression spring C4, the moving seat C5 reciprocates up and down. Driven by the moving seat C5, the initial cutting blade sliding structure C6 and the fine cutting blade C7 move downwards together. The cutting edge height of the initial cutting blade C64 is lower than the height of the fine cutting blade C7, causing the initial cutting blade C64 to cut the inner pages of the workbook. Since the distance between the upper connecting rod 1222 and the lower connecting rod 1224 is 30%-50% of the thickness of the inner pages, the initial cutting blade C64 cannot completely cut the inner pages. Therefore, the initial cutting blade C64 cuts the inner pages of the workbook... The cutting depth of the inner pages is 30%-50% of their thickness. After the upper connecting rod 1222 and the lower connecting rod 1224 are in contact, the initial cutter C64 is restricted from moving further down. The moving seat C5 continues to move down along the outer wall of the initial cutter sliding structure C6, which will compress the first pre-compression spring C4 and also restrict the sliding support C62 from moving up. As a result, after the initial cutter C64 cuts, it will stay in the cutting groove, which can position and clamp the inner pages of the exercise book. The fine cutter C7 is not subject to downward constraint, so the fine cutter C7 continues to move down with the moving seat C5 to cut the inner pages of the exercise book. Then the belt conveyor 16 will transport the cut inner pages of the exercise book out.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated production equipment for automatic page splitting, cutting and conveying of exercise book inner pages, the structure of which includes a cutting and creasing structure (1), a conveyor belt (2), a control box (3), a page splitting machine (4), and a limiting guide frame (5); The conveyor belt (2) is embedded on the right side of the cutting and indentation structure (1); The lower end of the limiting guide frame (5) is fixedly installed on the upper end of the conveyor belt (2); The rear end of the piecing machine (4) is fixedly connected to the front end of the control box (3); The left side of the piecing machine (4) is fixedly connected to the right side of the limiting guide frame (5); Its features are: The cutting and indentation structure (1) includes a driver (11), a cutting structure (12), a buffer support frame (13), an indentation structure (14), an outer casing (15), and a belt conveyor frame (16). The lower end of the driver (11) is movably connected to the upper end of the cutting structure (12); The cutting structure (12) is installed inside the outer casing (15); The lower end of the buffer support frame (13) is fixedly connected to the upper end of the belt conveyor frame (16), and the upper end of the buffer support frame (13) is fixedly connected to the lower end of the cutting structure (12). The indentation structure (14) is installed inside the outer casing (15); The belt conveyor frame (16) is fixedly installed inside the outer casing (15).

2. The integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages according to claim 1, characterized in that: The indentation structure (14) includes a motor (141), a belt (142), and a pressure roller structure (143). The motor (141) is movably connected to the pressure roller structure (143) via a belt (142).

3. The integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages according to claim 2, characterized in that: The pressure roller structure (143) includes a rotating shaft (B1), a belt toothed ring groove (B2), an indentation ring frame (B3), and an indentation protrusion (B4). The rotating shaft (B1) and the belt toothed ring groove (B2) are an integrated structure; The outer ring of the rotating shaft (B1) and the inner ring of the indentation ring frame (B3) are fixedly connected by bolts; The indentation ring frame (B3) and the indentation protrusion (B4) are an integrated structure.

4. The integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages according to claim 1, characterized in that: The cutting structure (12) includes a cutting frame structure (121) and a limiting support frame structure (122). The front end of the cutting shear frame structure (121) is fixedly connected to the rear end of the limiting support frame structure (122); The lower end of the limiting support frame structure (122) is fixedly connected to the upper end of the belt conveyor frame (16).

5. The integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages according to claim 4, characterized in that: The cutting shear frame structure (121) includes an auxiliary slide groove (C1), a locking post (C2), an inner slide cavity (C3), a first pre-compression spring (C4), a moving seat (C5), a primary cutter sliding structure (C6), a fine cutter (C7), and a through hole (C8); The movable base (C5) is provided with an auxiliary slide groove (C1); The retaining post (C2) and the initial cutting blade sliding structure (C6) are an integrated structure; The initial cutting blade sliding structure (C6) is located inside the inner sliding cavity (C3) and is slidably connected. The inner sliding cavity (C3) and the moving seat (C5) are an integrated structure. The upper end of the locking post (C2) is fixedly connected to the lower end of the first preload spring (C4); The lower end of the movable seat (C5) is fixedly connected to the upper end of the precision cutting blade (C7) by bolts; The movable base (C5) and the through hole (C8) are an integrated structure.

6. The integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages according to claim 5, characterized in that: The initial cutter sliding structure (C6) includes an auxiliary inner slider (C61), a sliding support (C62), a connecting rod (C63), and an initial cutter (C64). The auxiliary inner slider (C61) is welded to the front and rear ends of the sliding support (C62); The lower end of the sliding support (C62) is welded to the upper end of the connecting rod (C63); The lower end of the connecting rod (C63) is embedded and installed on the upper end of the primary cutter (C64).

7. The integrated production equipment for automatic page splitting, cutting, and conveying of exercise book inner pages according to claim 6, characterized in that: The limiting support frame structure (122) includes a connecting support plate (1221), an upper connecting rod (1222), a second preload spring (1223), a lower connecting rod (1224), a support plate (1225), a fixed support (1226), and a limiting slide plate (1227). The lower end of the connecting support plate (1221) is welded to the upper end of the upper connecting rod (1222); The second preload spring (1223) is located between the lower connecting rod (1224) and the limiting slide (1227); The lower end of the upper connecting rod (1222) is fixedly connected to the upper end of the limiting slide (1227); The outer ring of the limiting slide (1227) is in contact with the inner wall of the lower connecting rod (1224); There is a gap between the limiting slide (1227) and the connecting rod (1224); The lower end of the lower connecting rod (1224) is fixedly installed on the upper end of the support plate (1225); The lower right end of the support plate (1225) is fixedly connected to the upper end of the fixed support (1226) by bolts.

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