Arc-shaped cutter device

Abstract

The invention discloses an arc-shaped cutter device, and belongs to the technical field of sheet machining equipment. The arc-shaped cutter device comprises a rack, a cutter roller and a supporting roller, the cutter roller and the supporting roller are both rotationally connected with the rack, the cutter roller comprises a supporting shaft and two cutter bodies, the two cutter bodies are slidably connected with the supporting shaft through a connecting mechanism, the supporting shaft is provided with an adjusting mechanism used for adjusting the distance between the two cutter bodies, and the supporting shaft is rotationally connected with the rack through a sliding base. The two cutter bodies capable of sliding on the supporting shaft are utilized, and the distance between the two cutter bodies can be adjusted through the adjusting mechanism, so that the sheet shearing machine can adapt to different sheet widths, or shearing of different styles is achieved by adjusting the distance between the cutter bodies, and the sheet shearing machine is simple in structure, convenient to use and high in practicability. And therefore, the knife roll has replacement applicability.

Description

Technical Field

[0001] The invention relates to the technical field of sheet material processing equipment, in particular to an arc knife device. Background Art

[0002] When cutting sheets in batches, an arc knife device is often needed. A knife roller with an arc knife is pressed against a support roller so that the passing sheets can be cut according to the shape of the arc knife. Existing knife rollers are generally customized according to the shape requirements of the product, which makes the use of knife rollers have certain limitations. Therefore, a new arc knife device is needed to solve this problem. Summary of the invention

[0003] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and other drawings of the description.

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages and provide a curved knife device.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: an arc knife device, comprising a frame, a knife roller and a support roller, the knife roller and the support roller are both rotatably connected to the frame, the knife roller comprises a support shaft and two knife bodies, the two knife bodies are slidably connected to the support shaft through a connecting mechanism, the support shaft is provided with an adjustment mechanism for adjusting the distance between the two knife bodies, the support shaft is rotatably connected to the frame through a slide seat, the slide seat is slidably connected to the frame, and the frame is provided with a driving mechanism for driving the slide seat to slide.

[0006] By adopting the above technical solution, two knife bodies that can slide on the support shaft are used, and the distance between the two knife bodies can be adjusted through an adjustment mechanism, so as to adapt to different sheet widths, or different styles of shearing can be achieved by adjusting the knife body distance, so that the knife roller has the applicability of replacement, and the driving mechanism can drive the slide to drive the knife roller to move upward to form a gap with the support roller, which can facilitate the insertion of the sheet and ensure that the sliding of the knife body will not damage the support roller.

[0007] Preferably, the connection mechanism includes two connection plates and a plurality of connection rods, two support shafts are provided, and the two support shafts are rotatably connected to the two sides of the frame, the two connection plates are fixedly connected to the two support shafts, and the plurality of connection rods are fixedly connected to the two connection plates, and each connection rod and the plurality of connection rods on the two connection plates are slidably connected to the two blade bodies. The present invention utilizes a plurality of connection rods fixed to the connection plates, so that the blade body can be slidably connected to the connection plates to achieve adjustment of the blade body, and also enables the connection plates to transmit rotation to the blade body, the connection plates are rotatably connected to the frame through the support shaft, and the blade body is driven by driving the support shaft to rotate.

[0008] Preferably, the adjustment mechanism includes an adjustment shaft, the adjustment shaft is arranged between the two connection disks, and the two ends of the adjustment shaft are respectively rotatably connected to the two connection disks, the two cutter bodies are both threadedly connected to the adjustment shaft, and the threads between the two cutter bodies and the adjustment shaft are in opposite directions, and the adjustment shaft is provided with a limiting mechanism for relative rotation between the adjustment shaft and the cutter body. The two ends of the adjustment shaft of the present invention are respectively rotated with the two connection disks, so that the adjustment shaft can rotate relative to the cutter body, and through the threaded connection between the cutter body and the adjustment shaft, when the adjustment shaft rotates, the two cutter heads will approach or move away from each other under the action of the threads with opposite directions, thereby achieving the effect of adjusting the spacing, and the relative rotation between the adjustment shaft and the cutter body and the connection disk can be limited by the limiting mechanism, so that when the cutter body rotates, the adjustment shaft will not rotate relative to the cutter head.

[0009] Preferably, the limiting mechanism comprises a friction sleeve, a friction ring and a slide bar, the slide bar is connected to the adjusting shaft, the friction sleeve rod is sleeved on the slide bar, and the friction sleeve is slidably connected to the slide bar, an elastic member 1 is arranged between the friction sleeve and the slide bar, the friction ring is provided with an annular groove, the friction sleeve is inserted into the annular groove, and a fixing structure for sliding the friction sleeve is arranged on the slide bar. The present invention utilizes the elastic member 1 to enable the friction sleeve to be tightly embedded in the annular groove of the friction ring, the head of the friction sleeve and the friction ring are both made of plastic material, and the mutual pressure between them can generate a large friction force, and the friction force is utilized to limit the relative rotation between the adjusting shaft and the cutter body, and the friction sleeve is pushed to overcome the elastic force of the elastic member 1 to slide, so that the friction sleeve can be separated from the annular groove of the friction ring, thereby releasing the limiting state of the adjusting shaft, and the fixing mechanism can be used to keep the friction sleeve in a state of being separated from the friction ring, thereby facilitating subsequent operations.

[0010] Preferably, the fixing structure includes a clamping column and a limiting guide groove, the limiting guide groove is provided on the friction sleeve, the clamping column is fixedly connected to the slide rod, and the friction sleeve is rotatably connected to the slide rod. The present invention utilizes an L-shaped limiting guide groove, and by pulling the friction sleeve, the clamping column on the slide rod is clamped into the vertical part of the limiting guide groove, and then by rotating the friction sleeve, the clamping column enters the horizontal part of the limiting guide groove, so that the clamping column can limit the axial sliding of the friction sleeve.

[0011] Preferably, the slide bar is rotatably connected to the adjustment shaft. After the friction sleeve is separated from the annular groove and fixed by the fixing mechanism, the slide bar can be rotated to be in a vertical state, so that it can be used as a handle when rotating the adjustment shaft.

[0012] Preferably, the driving mechanism comprises a screw and an adjusting block, the adjusting block is threadedly connected to the screw, the screw is rotatably connected to the frame, the top surface of the adjusting block abuts against the bottom surface of the slide, and the abutting surfaces of the adjusting block and the slide are both inclined surfaces. The present invention utilizes the threaded connection between the adjusting block and the screw so that the adjusting block can be driven to slide when the screw is rotated, and the inclined surface between the adjusting block and the slide and the weight of the slide can be used to drive the slide to slide up and down.

[0013] Preferably, the support roller and the knife roller are both provided with pulleys, the two pulleys are mutually connected by a belt transmission, the pulley on the support roller is driven by a motor, and the frame is provided with a tensioning mechanism for tensioning the belt. The present invention realizes the transmission relationship between the support roller and the knife roller through the belt and the pulley, the motor is connected to the pulley on the support roller, and provides power for the entire device, and the tensioning mechanism can automatically tension the belt after the slide seat drives the knife roller to move, so that the pulley and the motor still maintain a transmission relationship, so that the self-locking of the motor can be used to limit the rotation of the connecting disk on the knife roller and the knife body, so that the adjustment shaft can rotate relative to the knife body.

[0014] Preferably, the tensioning mechanism includes two tensioning wheels, which are respectively arranged on both sides of the pulley on the knife roller, and the height of the two tensioning wheels is higher than the pulley. The two pulleys and the two tensioning wheels are mutually connected by the belt, and the tensioning wheels are connected to the frame through a slider, the slider is rotationally connected to the tensioning wheels, the slider is slidably connected to the frame, and an elastic member 2 is arranged between the slider and the frame. The present invention utilizes the elastic member 2 in a compressed state to enable both tensioning wheels to apply a thrust to the belt upward, thereby achieving tensioning of the belt. When the slide seat drives the knife roller upward, the elastic member 2 releases the elastic force to drive the slider to slide, so that the slider drives the tensioning wheel to tension the belt again, thereby ensuring that the transmission relationship between the knife roller and the motor is maintained.

[0015] Preferably, the slide is fixedly connected with two support rods, the two support rods are respectively located on both sides of the top of the slide, the two support rods are slidably connected with a pressure plate, the two support rods are sleeved with an elastic member three, the two elastic members three are arranged between the pressure plate and the slide, the frame is rotatably connected with a drive rod, and the drive rod is threadedly connected with the pressure plate. The present invention enables the knife roller to apply pressure to the support roller by utilizing the elastic force generated by the compression of the elastic member three by arranging the elastic member three between the slide and the pressure plate, so that the knife roller has a better shearing effect and reduces the situation of failure to shear, and the driving rod can be rotated to drive the pressure plate to move by utilizing the thread, thereby adjusting the distance between the pressure plate and the slide, thereby adjusting the elastic force of the elastic member three.

[0016] In summary, the beneficial effects of the present invention are:

[0017] 1. By using two knife bodies that can slide on the support shaft, the distance between the two knife bodies can be adjusted through the adjustment mechanism, so as to adapt to different sheet widths, or to achieve different styles of shearing by adjusting the knife body distance, so that the knife roller has the applicability of replacement.

[0018] 2. The driving mechanism can drive the slide to drive the knife roller to move upward, forming a gap between the knife roller and the support roller, which can facilitate the insertion of the sheet and prevent the sliding of the knife body from damaging the support roller.

[0019] 3. The friction sleeve is tightly embedded in the ring groove of the friction ring by using an elastic member. The head of the friction sleeve and the friction ring are both made of plastic. The mutual pressure between them can generate a large friction force. The friction force is used to limit the relative rotation between the adjustment shaft and the cutter body. The friction sleeve is fixed by a fixing mechanism and rotated to a vertical state so that it can be used as a handle when rotating the adjustment shaft, making the rotation more labor-saving.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0021] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiment described with reference to various figures and drawings.

[0022] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation of the present invention.

[0024] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure;

[0027] Figure 2 A schematic diagram of the cross-section structure Figure 1 ;

[0028] Figure 3 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0029] Figure 4 It is a schematic diagram of the side structure;

[0030] Figure 5 A schematic diagram of the cross-section structure Figure 2 .

[0031] Explanation of main figure markings: 1. frame; 2. support roller; 3. support shaft; 4. knife body; 5. slide seat; 6. connecting plate; 7. connecting rod; 8. adjusting shaft; 9. friction sleeve; 10. friction ring; 11. slide rod; 12. elastic member 1; 13. clamping column; 14. limiting guide groove; 15. screw rod; 16. adjusting block; 17. pulley; 18. belt; 19. tensioning wheel; 20. slide block; 21. elastic member 2; 22. support rod; 23. pressure plate; 24. elastic member 3; 25. driving rod. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but are not used to limit the present invention.

[0033] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] like Figure 1-5 As shown, an arc knife device includes a frame 1, a knife roller and a support roller 2, the knife roller and the support roller 2 are both rotatably connected to the frame 1, the knife roller includes a support shaft 3 and two knife bodies 4, the two knife bodies 4 are slidably connected to the support shaft 3 through a connecting mechanism, the support shaft 3 is provided with an adjustment mechanism for adjusting the distance between the two knife bodies 4, the support shaft 3 is rotatably connected to the frame 1 through a slide 5, the slide 5 is slidably connected to the frame 1, and the frame 1 is provided with a driving mechanism for driving the slide 5 to slide.

[0037] By adopting the above technical solution, two knife bodies 4 that can slide on the support shaft 3 are used, and the distance between the two knife bodies 4 can be adjusted through an adjustment mechanism, so as to adapt to different sheet widths, or different styles of shearing can be achieved by adjusting the distance between the knife bodies 4, so that the knife roller has the applicability of replacement, and the driving mechanism can drive the slide seat 5 to slide and drive the knife roller to move upward to form a gap between the support roller 2, which can facilitate the insertion of the sheet and ensure that the sliding of the knife body 4 will not damage the support roller 2.

[0038] The connection mechanism includes two connection plates 6 and a plurality of connection rods 7. Two support shafts 3 are provided, and the two support shafts 3 are rotatably connected to the two sides of the frame 1, respectively. The two connection plates 6 are fixedly connected to the two support shafts 3, respectively. The plurality of connection rods 7 are fixedly connected to the two connection plates 6, respectively. Each connection rod 7 and the plurality of connection rods 7 on the two connection plates 6 are slidably connected to the two blade bodies 4. The plurality of connection rods 7 fixed to the connection plates 6 are used to enable the blade body 4 to be slidably connected to the connection plates 6 to achieve adjustment of the blade body 4, and also enable the connection plates 6 to transmit rotation to the blade body 4. The connection plates 6 are rotatably connected to the frame 1 through the support shaft 3, and the blade body 4 is driven by driving the support shaft 3 to rotate.

[0039] The adjustment mechanism includes an adjustment shaft 8, which is arranged between the two connection disks 6, and the two ends of the adjustment shaft 8 are respectively rotatably connected with the two connection disks 6, and the two cutter bodies 4 are both threadedly connected with the adjustment shaft 8, and the threads between the two cutter bodies 4 and the adjustment shaft 8 are in opposite directions, and the adjustment shaft 8 is provided with a limiting mechanism for relative rotation between the adjustment shaft 8 and the cutter body 4. The two ends of the adjustment shaft 8 are respectively rotated with the two connection disks 6, so that the adjustment shaft 8 can rotate relative to the cutter body 4, and through the threaded connection between the cutter body 4 and the adjustment shaft, when the adjustment shaft 8 rotates, the two cutter heads will approach or move away from each other under the action of the threads with opposite directions, thereby achieving the effect of adjusting the spacing, and the relative rotation between the adjustment shaft 8 and the cutter body 4 and the connection disk 6 can be limited by the limiting mechanism, so that when the cutter body 4 rotates, the adjustment shaft 8 will not rotate relative to the cutter head.

[0040] The limiting mechanism includes a friction sleeve 9, a friction ring 10 and a slide bar 11. The slide bar 11 is connected to the adjustment shaft 8. The friction sleeve rod is sleeved on the slide bar 11. The friction sleeve 9 is slidably connected to the slide bar 11. An elastic member 12 is arranged between the friction sleeve 9 and the slide bar 11. The friction ring 10 is provided with an annular groove. The friction sleeve 9 is inserted into the annular groove. The slide bar 11 is provided with a fixing structure for sliding the friction sleeve 9. The elastic member 12 is used to make the friction sleeve 9 fit tightly in the annular groove of the friction ring 10. The head of the friction sleeve 9 and the friction ring 10 are both made of plastic. The mutual pressure can generate a large friction force. The friction force is used to limit the relative rotation between the adjustment shaft 8 and the cutter body 4. The friction sleeve 9 is pushed to overcome the elastic force of the elastic member 12 to slide, so that the friction sleeve 9 can be separated from the annular groove of the friction ring 10, thereby releasing the limiting state of the adjustment shaft 8. The fixing mechanism can keep the friction sleeve 9 in a state of being separated from the friction ring 10, so as to facilitate subsequent operations.

[0041] The fixing structure includes a clamping column 13 and a limiting guide groove 14. The limiting guide groove 14 is provided on the friction sleeve 9. The clamping column 13 is fixedly connected to the slide bar 11. The friction sleeve 9 is rotatably connected to the slide bar 11. By using the L-shaped limiting guide groove 14, the clamping column 13 on the slide bar 11 is clamped into the vertical part of the limiting guide groove 14 by pulling the friction sleeve 9, and then the clamping column 13 is entered into the horizontal part of the limiting guide groove 14 by rotating the friction sleeve 9, so that the clamping column 13 can limit the axial sliding of the friction sleeve 9.

[0042] The slide bar 11 is rotatably connected to the adjustment shaft 8. After the friction sleeve 9 is separated from the annular groove and fixed by the fixing mechanism, the slide bar 11 can be rotated to make the slide bar 11 become a vertical state, so that it can be used as a handle when rotating the adjustment shaft 8.

[0043] The driving mechanism includes a screw rod 15 and an adjusting block 16. The adjusting block 16 is threadedly connected to the screw rod 15. The screw rod 15 is rotatably connected to the frame 1. The top surface of the adjusting block 16 abuts against the bottom surface of the slide 5. Both the abutting surfaces of the adjusting block 16 and the slide 5 are inclined surfaces. By utilizing the threaded connection between the adjusting block 16 and the screw rod 15, the adjusting block 16 can be driven to slide when the screw rod 15 is rotated. With the inclined surface between the adjusting block 16 and the slide 5 and the weight of the slide 5, the slide 5 can be driven to slide up and down.

[0044] The support roller 2 and the knife roller are both provided with pulleys 17, and the two pulleys 17 are mutually connected by a belt 18. The pulley 17 on the support roller 2 is driven by a motor, and the frame 1 is provided with a tensioning mechanism for tensioning the belt 18. The transmission relationship between the support roller 2 and the knife roller is realized by the belt 18 and the pulley 17. The motor is connected to the pulley 17 on the support roller 2 to provide power for the entire device. The tensioning mechanism can automatically tension the belt 18 after the slide 5 drives the knife roller to move, so that the pulley 17 and the motor still maintain a transmission relationship, so that the self-locking of the motor can be used to limit the rotation of the connecting disk 6 on the knife roller and the knife body 4, so that the adjustment shaft 8 can rotate relative to the knife body 4.

[0045] The tensioning mechanism includes two tensioning wheels 19, which are respectively arranged on both sides of the belt wheel 17 on the knife roller, and the height of the two tensioning wheels 19 is higher than the belt wheel 17. The two belt wheels 17 and the two tensioning wheels 19 are mutually connected through the belt 18. The tensioning wheels 19 are connected to the frame 1 through the slider 20. The slider 20 is rotatably connected to the tensioning wheels 19, and the slider 20 is slidably connected to the frame 1. An elastic member 21 is arranged between the slider 20 and the frame 1. The elastic member 21 in a compressed state can make the two tensioning wheels 19 both apply a thrust to the belt 18 upward, thereby realizing the tensioning of the belt 18. When the slide 5 drives the knife roller upward, the elastic member 21 will release the elastic force to drive the slider 20 to slide, so that the slider 20 drives the tensioning wheel 19 to tighten the belt 18 again, thereby ensuring that the transmission relationship between the knife roller and the motor is maintained.

[0046] The slide 5 is fixedly connected with two support rods 22, which are respectively located on both sides of the top of the slide 5. The two support rods 22 are slidably connected with a pressure plate 23. The two support rods 22 are sleeved with an elastic member 3 24. The two elastic members 3 24 are arranged between the pressure plate 23 and the slide 5. The frame 1 is rotatably connected with a driving rod 25, which is threadedly connected with the pressure plate 23. The elastic member 3 24 arranged between the slide 5 and the pressure plate 23 allows the knife roller to apply pressure to the support roller 2 by using the elastic force generated by the compression of the elastic member 3 24, so that the knife roller has a better shearing effect and reduces the situation of failure to cut. By rotating the driving rod 25, the pressure plate 23 can be driven to move by the thread, so as to adjust the distance between the pressure plate 23 and the slide 5, thereby adjusting the elastic force of the elastic member 3 24.

[0047] It should be noted that many specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

Claims

1. An arc knife device, comprising a frame (1), a knife roller and a support roller (2), wherein the knife roller and the support roller (2) are both rotatably connected to the frame (1), characterized in that: The knife roller comprises a support shaft (3) and two knife bodies (4); the two knife bodies (4) are slidably connected to the support shaft (3) via a connecting mechanism; the support shaft (3) is provided with an adjusting mechanism for adjusting the distance between the two knife bodies (4); the support shaft (3) is rotatably connected to the frame (1) via a slide seat (5); the slide seat (5) is slidably connected to the frame (1); and the frame (1) is provided with a driving mechanism for driving the slide seat (5) to slide.

2. The arc knife device according to claim 1, characterized in that: The connection mechanism comprises two connection plates (6) and a plurality of connection rods (7); two support shafts (3) are provided, and the two support shafts (3) are rotatably connected to the two sides of the frame (1); the two connection plates (6) are respectively fixedly connected to the two support shafts (3); the plurality of connection rods (7) are respectively fixedly connected to the two connection plates (6); each connection rod (7) and the plurality of connection rods (7) on the two connection plates (6) are respectively slidably connected to the two blade bodies (4).

3. The arc knife device according to claim 2, characterized in that: The adjusting mechanism comprises an adjusting shaft (8), the adjusting shaft (8) being arranged between the two connecting plates (6), and the two ends of the adjusting shaft (8) being rotatably connected to the two connecting plates (6), respectively; the two blade bodies (4) are both threadedly connected to the adjusting shaft (8), and the threads between the two blade bodies (4) and the adjusting shaft (8) are in opposite directions; the adjusting shaft (8) is provided with a limiting mechanism for limiting the relative rotation of the adjusting shaft (8) and the blade body (4).

4. The arc knife device according to claim 3, characterized in that: The limiting mechanism comprises a friction sleeve (9), a friction ring (10) and a sliding rod (11); the sliding rod (11) is connected to the adjusting shaft (8); the friction sleeve is sleeved on the sliding rod (11); the friction sleeve (9) is slidably connected to the sliding rod (11); an elastic member (12) is provided between the friction sleeve (9) and the sliding rod (11); the friction ring (10) is provided with an annular groove; the friction sleeve (9) is inserted into the annular groove; and a fixing structure for sliding the friction sleeve (9) is provided on the sliding rod (11).

5. The arc knife device according to claim 4, characterized in that: The fixing structure comprises a clamping column (13) and a limiting guide groove (14); the limiting guide groove (14) is arranged on the friction sleeve (9); the clamping column (13) is fixedly connected to the slide rod (11); and the friction sleeve (9) is rotatably connected to the slide rod (11).

6. The arc knife device according to claim 5, characterized in that: The sliding rod (11) is rotationally connected to the adjusting shaft (8).

7. The arc knife device according to claim 1, characterized in that: The driving mechanism comprises a screw rod (15) and an adjusting block (16); the adjusting block (16) is threadedly connected to the screw rod (15); the screw rod (15) is rotatably connected to the frame (1); the top surface of the adjusting block (16) abuts against the bottom surface of the slide seat (5); and the abutting surfaces of the adjusting block (16) and the slide seat (5) are both inclined surfaces.

8. The arc knife device according to claim 1, characterized in that: The support roller (2) and the knife roller are both provided with pulleys (17), and the two pulleys (17) are connected to each other by a belt (18). The pulley (17) on the support roller (2) is driven by a motor, and the frame (1) is provided with a tensioning mechanism for tensioning the belt (18).

9. The arc knife device according to claim 8, characterized in that: The tensioning mechanism comprises two tensioning wheels (19), which are respectively arranged on both sides of the belt pulley (17) on the knife roller, and the height of the two tensioning wheels (19) is higher than that of the belt pulley (17). The two belt pulleys (17) and the two tensioning wheels (19) are connected to each other by the belt (18). The tensioning wheel (19) is connected to the frame (1) through a slider (20). The slider (20) is rotatably connected to the tensioning wheel (19). The slider (20) is slidably connected to the frame (1), and an elastic member 2 (21) is arranged between the slider (20) and the frame (1).

10. The arc knife device according to claim 1, characterized in that: The slide seat (5) is fixedly connected to two support rods (22), and the two support rods (22) are respectively located on both sides of the top of the slide seat (5). The two support rods (22) are slidably connected to a pressure plate (23). The two support rods (22) are both sleeved with an elastic member three (24), and the two elastic members three (24) are both arranged between the pressure plate (23) and the slide seat (5). The frame (1) is rotatably connected to a driving rod (25), and the driving rod (25) is threadedly connected to the pressure plate (23).

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