A corner cutting tool and a slotting machine using the same

Abstract

The application discloses a corner cutting knife and a slotting machine using the same. The corner cutting knife is characterized in that a first rotating shaft is arranged on a knife holder, a connecting block is rotatably connected to the first rotating shaft, a first blade is fixed to one side surface of the connecting block, the length direction of the first blade is arranged at an acute angle or an obtuse angle with the axis of the first rotating shaft, an elastic pad is arranged on the side of the connecting block away from the first blade, and the elastic pad is fixed to the knife holder. In use, one end of the first blade first contacts the paperboard, and then gradually changes to the other end contacting the paperboard. In the changing process, when the stress position of the first blade changes, the connecting block and the first rotating shaft relatively rotate, so that the distance between the position of the blade edge of the first blade when cutting the paperboard and the axis of the rotating shaft is equal. Since the first blade cuts the paperboard, the reaction force of the paperboard on the first blade is mainly concentrated on the first rotating shaft and the knife holder, and the first rotating shaft is of a solid structure, so the strength is large and the first rotating shaft is not easy to be damaged.

Description

Technical Field

[0001] This invention relates to the field of cardboard box production equipment, and particularly to a corner cutting knife and a slotting machine using the corner cutting knife. Background Technology

[0002] A corrugated cardboard box slotting machine is a piece of equipment used in the production of corrugated cardboard boxes to slot the edges. In corrugated cardboard box production, the slotting machine's cutter is used to slot and cut the corners of the corrugated cardboard. A corner cutting knife is required when cutting the corners.

[0003] The existing corner cutting knife in the slotting machine includes a knife holder fixed on the cutter head, a compression spring mounted on the knife holder, and a blade mounted on the knife holder and abutting against one end of the compression spring. When cutting cardboard, the blade squeezes the compression spring, so that the rubber pads used by the blade to support the cardboard form soft contact, reducing the wear of the rubber pads. However, in this corner cutting knife, through holes for mounting the compression spring and the blade need to be set on the knife holder. Due to the limitation of the installation size, the external size of the knife holder cannot be made very large. When cutting bevels on cardboard, the two ends of the blade are subjected to force sequentially. Therefore, the force applied to the knife holder is uneven, which can easily lead to cracking or damage of the knife holder.

[0004] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a corner cutting knife and a grooving machine using the corner cutting knife, in order to solve the problem that existing corner cutting knives are easily damaged.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A corner cutter includes a cutter holder and a first blade. The cutter holder is provided with a first rotating shaft, and a connecting block is rotatably connected to the first rotating shaft. The first blade is fixed on one side of the connecting block. The length direction of the first blade is set at an acute or obtuse angle with the axis of the first rotating shaft. An elastic pad is provided on the side of the connecting block away from the first blade, and the elastic pad is fixed on the cutter holder.

[0008] In the aforementioned corner-cutting blade, the blade holder is provided with a second rotating shaft, and a mounting base is rotatably connected to the second rotating shaft. The first rotating shaft is fixed on the mounting base, and the axis of the second rotating shaft is perpendicular to the axis of the first rotating shaft.

[0009] In the aforementioned corner-cutting blade, a limiting block is fixed on the blade holder to restrict the swing range of the mounting base.

[0010] In the aforementioned corner cutter, the first rotating shaft has a locking nut for fixing the connecting block threadedly connected to the end away from the mounting base.

[0011] In the aforementioned corner-cutting blade, the blade holder is provided with a second blade, the length direction of which is perpendicular to the axis of the first rotating shaft.

[0012] The cutting blade also includes a fixed base with a sliding groove. The blade holder is slidably connected to the sliding groove of the fixed base, and the blade holder is provided with a locking structure for locking the blade holder to the fixed base.

[0013] In the aforementioned corner cutter, the locking structure includes a telescopic component fixed on the cutter holder and a locking block fixed on the telescopic end of the telescopic component. The fixing seat has slots on both sides of the slide groove that cooperate with the locking block.

[0014] In the aforementioned corner cutter, the telescopic component includes an outer sleeve, a compression spring, and a telescopic rod. The telescopic rod passes through the central hole of the outer sleeve and is slidably connected to the outer sleeve. The locking block is fixed to one end of the telescopic rod. A limit rod is fixed to the end of the telescopic rod away from the locking block. The outer sleeve has a protruding ring at the end near the locking block. The compression spring is sleeved on the outside of the outer sleeve, and its two ends abut against the protruding ring and the limit rod, respectively. The outer sleeve has a guide groove at the end away from the protruding ring. The limit rod passes through the guide groove and abuts against the compression spring on the outside of the outer sleeve.

[0015] In the aforementioned corner-cutting blade, the blade holder includes a mounting plate and a pressure plate fixedly connected to the mounting plate. The mounting plate has a first stepped through hole, and the outer sleeve is placed inside the first stepped through hole. The protruding ring of the outer sleeve abuts against the step on the first stepped through hole. The cross-section of the outer sleeve at the end away from the protruding ring is non-circular. The pressure plate has a second stepped through hole that matches the non-circular end of the outer sleeve. The mounting plate is slidably connected to the fixed base, and the second blade is fixed on the pressure plate.

[0016] In the aforementioned corner-cutting blade, the cross-section of the groove is T-shaped, and the blade holder is provided with a connecting part that mates with the groove.

[0017] A grooving machine includes the aforementioned corner cutting blade, comprising a frame, a rotating shaft rotatably connected to the frame, and a cutter head fixed on the rotating shaft. The corner cutting blade is fixed on the cutter head, and a drive assembly is drivenly connected to one end of the rotating shaft. The drive assembly is fixed on the frame.

[0018] Beneficial effects: By providing a first rotating shaft on the blade holder, with a connecting block rotatably connected to the first rotating shaft, and a first blade fixed on one side of the connecting block, the length direction of the first blade is set at an acute or obtuse angle with the axis of the first rotating shaft. An elastic pad is provided on the side of the connecting block away from the first blade, and the elastic pad is fixed on the blade holder. During use, one end of the first blade first contacts the cardboard, and then gradually changes to the other end contacting the cardboard. During this change, when the force position of the first blade changes, the connecting block and the first rotating shaft rotate relative to each other, so that the distance between the position of the first blade's cutting edge and the axis of the rotating shaft is equal when cutting the cardboard. Because the first blade cuts the cardboard, the reaction force of the cardboard on the first blade is mainly concentrated on the first rotating shaft and the blade holder. The first rotating shaft is a solid structure, so it has high strength and is not easily damaged. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure where the corner cutting blade is installed on the grooving machine.

[0020] Figure 2 yes Figure 1 The main view.

[0021] Figure 3 yes Figure 2 The left view.

[0022] Figure 4 This is the front view of the corner cutter.

[0023] Figure 5 yes Figure 4 A sectional view.

[0024] Figure 6 yes Figure 5 Sectional view at AA.

[0025] Figure 7 This is a top view of the corner cutter.

[0026] Figure 8 This is a schematic diagram of the locking structure.

[0027] Figure 9 This is a schematic diagram of the pressure plate structure.

[0028] Figure 10 This is a structural diagram of a grooving machine. Only part of the corner cutting blade structure and the cutter head are shown in the diagram.

[0029] Figure 11 yes Figure 10 A magnified view of a portion at point A.

[0030] Key component symbols: 210-Fixed base, 211-Slide groove, 212-Slot, 220-Tool holder, 221-Mounting plate, 222-Pressure plate, 223-First step through hole, 224-Second step through hole, 230-First rotating shaft, 231-Locking nut, 240-Connecting block, 260-Elastic pad, 250-Second rotating shaft, 251-Limiting block, 252-Mounting base, 270-Locking structure 271-Locking block, 272-Telescopic component, 273-Compression spring, 274-Outer sleeve, 275-Telescopic rod, 276-Limit rod, 277-Protruding ring, 278-Guide groove, 281-First blade, 282-Second blade, 100-Frame, 110-Rotating shaft, 111-Cutter disc, 120-Roller, 121-Rubber pad, 130-Telescopic drive component, 140-Drive assembly, 200-Cornering blade. Detailed Implementation

[0031] This invention provides a corner-cutting blade and a grooving machine using the corner-cutting blade. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the scope of protection of the invention.

[0032] See Figure 1-3 A grooving machine includes a frame 100, a rotating shaft 110 rotatably connected to the frame 100, a cutter head 111 fixed to the rotating shaft 110, and a corner cutting blade 200 fixed to the cutter head 111. One end of the rotating shaft 110 is connected to a drive assembly 140, which is fixed to the frame 100. In use, the slotting machine has two sets of cutting assemblies on the frame 100, each consisting of a rotating shaft 110, a cutter head 111, a corner cutting blade 200, and a drive assembly. When the cardboard passes between the two sets of cutting assemblies, the drive assembly drives the rotating shaft 110 to rotate, causing the corner cutting blades 200 on the two sets of cutting assemblies to cut the corresponding grooves or corners of the cardboard. Alternatively, the slotting machine has a set of cutting assemblies on the frame 100, consisting of a rotating shaft 110, a cutter head 111, a corner cutting blade 200, and a drive assembly, and a roller 120 with a rubber pad 121 is set on the outside of the cutting assemblies. When the cardboard passes between the cutting assemblies and the roller 120, the drive assembly drives the rotating shaft 110 to rotate, causing the corner cutting blades 200 on the cutting assemblies to cut the corresponding grooves or corners of the cardboard.

[0033] See Figure 4-7A corner cutter includes a cutter holder 220 and a first blade 281. The cutter holder 220 is provided with a first rotating shaft 230, and a connecting block 240 is rotatably connected to the first rotating shaft 230. The first blade 281 is fixed on one side of the connecting block 240. The length direction of the first blade 281 is set at an acute angle or an obtuse angle with the axis of the first rotating shaft 230. An elastic pad 260 is provided on the side of the connecting block 240 away from the first blade 281, and the elastic pad 260 is fixed on the cutter holder 220.

[0034] In the above description, because the length direction of the first blade 281 needs to be set at an acute or obtuse angle to the axis of the first rotating shaft 230 when cutting a bevel on the cardboard, the distances between various points of the first blade 281 and the axis of the rotating shaft 110 are not equal; in other words, referring to... Figure 2 and Figure 3 The straight line where the highest point of the rubber pad 121 is located intersects the length direction of the first blade 281. In this application, the connecting block 240 is connected to the blade holder 220 through the first rotating shaft 230. The connecting block 240 can rotate around the rotating shaft 110. Therefore, during use, one end of the first blade 281 first contacts the cardboard, and then gradually changes to the other end contacting the cardboard. During this change, when the force position of the first blade 281 changes, the connecting block 240 and the first rotating shaft 230 rotate relative to each other, so that the distance between the position of the blade of the first blade 281 when cutting the cardboard and the axis of the rotating shaft 110 is equal. Therefore, during the cutting of the cardboard, the first blade 281 will not cut the rubber pad 121 on the roller 120, and thus will not affect the service life of the rubber pad 121.

[0035] During the cutting process of the cardboard by the first blade 281, the reaction force of the cardboard on the first blade 281 is mainly concentrated on the first rotating shaft 230 and the blade holder 220. The first rotating shaft 230 is a solid structure, so it has high strength and is not easily damaged. Furthermore, the elastic pad 260 placed between the connecting block 240 and the blade holder 220 can reduce a certain amount of impact of the first blade 281 and improve the service life of the corner cutting blade 200. During the cutting process of the cardboard by the first blade 281, the middle part and one end of the first blade 281 are supported by the first rotating shaft 230 and the blade holder 220 respectively, making the corner cutting blade 200 less prone to damage.

[0036] Specifically, the elastic pad 260 allows the connecting block 240 to remain in a balanced position without external force. In this embodiment, the cutter holder 220 can be directly fixed to the cutter head 111, and the first blade 281 is positioned on the outer side of the circumferential surface of the cutter head 111.

[0037] In a preferred embodiment, the blade holder 220 is provided with a second rotating shaft 250, and a mounting base 252 is rotatably connected to the second rotating shaft 250. The first rotating shaft 230 is fixed on the mounting base 252, and the axis of the second rotating shaft 250 is perpendicular to the axis of the first rotating shaft 230. The arrangement of the first rotating shaft 230 and the second rotating shaft 250 allows the first blade 281 to swing around the first rotating shaft 230 and the second rotating shaft 250, and when the first blade 281 swings around the first rotating shaft 230 and the second rotating shaft 250, it can press against the elastic pad 260. In use, the first blade 281 is subjected to a reaction force from the cardboard in the direction of the axis of the rotating shaft 110, causing the first blade 281 to swing around the first rotating shaft 230 and the second rotating shaft 250. Therefore, this reaction force is applied to the blade holder 220 through the connecting block 240 and the elastic pad 260. Since the blade holder 220 has a large radial dimension, it is not easily damaged.

[0038] Because the first blade 281 cannot swing significantly away from the axis of the second rotating shaft 250 during use, a limiting block 251 is fixed on the tool holder 220 to limit the swing range of the mounting base 252. The limiting block 251 is used to keep the connecting block 240 in contact with the elastic pad 260, and the elastic pad 260 also has a certain compressibility range. Therefore, when the first blade 281 is not under force, the connecting block 240 is pushed towards the limiting block 251 by the restoring force of the elastic pad 260, so it will not swing freely around the second rotating shaft 250 when the first blade 281 is not under force. When the first blade 281 is under force, the pressure of the connecting block 240 on the elastic pad 260 increases, thus enabling the first blade 281 to swing around the second rotating shaft 250, so that the force on the first blade 281 is applied to the tool holder 220.

[0039] In the above, the elastic pad 260 can be a rubber pad 121, a silicone pad 121, etc.

[0040] In a preferred embodiment, the first rotating shaft 230 has a locking nut 231 for fixing the connecting block 240 threadedly connected to the end of the first rotating shaft 230 away from the mounting base 252. In this embodiment, the end of the first rotating shaft 230 away from the mounting base 252 is provided with an external thread, and the locking nut 231 is connected to the external thread on the first rotating shaft 230. The connecting block 240 is fitted onto the first rotating shaft 230 and is located between the locking nut 231 and the mounting base 252. Therefore, by tightening the locking nut 231, the connecting block 240 is installed, preventing the connecting block 240 from falling off the first rotating shaft 230.

[0041] In a preferred embodiment, the blade holder 220 is provided with a second blade 282. The length direction of the second blade 282 is parallel to the axis of the rotating shaft 110. In other words, the straight line where the highest point of the rubber pad 121 is located is parallel to the length direction of the first blade 281. Therefore, when the second blade 282 rotates to the position for cutting the cardboard, the cutting edge of the second blade 282 is exactly at the highest point of the rubber pad 121, meaning that the edge of the cardboard cut by the second blade 282 has no bevel. The second blade 282 is used to chop the paper scraps that need to be removed or have already been removed, making the paper scraps smaller and easier to discharge, preventing them from getting stuck inside the slotting machine and affecting normal production.

[0042] In a preferred embodiment, the corner cutter 200 further includes a fixing base 210, which has a sliding groove 211. The cutter holder 220 is slidably connected to the sliding groove 211 of the fixing base 210, and the cutter holder 220 is provided with a locking structure 270 for locking the cutter holder 220 onto the fixing base 210. Specifically, after the locking structure 270 releases the fixing base 210, the cutter holder 220 can move within the range limited by the sliding groove 211 of the fixing base 210. When it moves to the desired position, it is locked using the locking structure 270.

[0043] See Figure 3-7 In practical applications, two corner-cutting blades 200 are typically installed on the cutter head 111. These two blades 200 cut the cardboard at the corner positions on the front and rear sides of the conveying direction, respectively. When two corner-cutting blades 200 are installed on the cutter head 111, the distance between the first blade 281 and the second blade 282 between the two blades 200 can be adjusted through this structure, thereby adjusting the distance between the corner positions on the front and rear sides of the cardboard in the conveying direction.

[0044] See Figure 4-8 In a preferred embodiment, the locking structure 270 includes a telescopic member 272 fixed on the tool holder 220 and a locking block 271 fixed on the telescopic end of the telescopic member 272. The fixing seat 210 has slots 212 on both sides of the slide groove 211 that cooperate with the locking block 271. When the telescopic end of the telescopic member 272 extends or retracts, the locking block 271 switches between a separated state and a engaged state with the slot 212. That is, when the locking block 271 is in the slot 212, the tool holder 220 and the fixing seat 210 are fixed.

[0045] In this embodiment, the telescopic component 272 includes an outer sleeve 274, a compression spring 273, and a telescopic rod 275. The telescopic rod 275 passes through the central hole of the outer sleeve 274, and the telescopic rod 275 and the outer sleeve 274 are slidably connected. The locking block 271 is fixed to one end of the telescopic rod 275. A limit rod 276 is fixed to the end of the telescopic rod 275 away from the locking block 271. The outer sleeve 274 has a protruding ring 277 at the end near the locking block 271. The compression spring 273 is sleeved on the outside of the outer shell, and its two ends abut against the protruding ring 277 and the limit rod 276, respectively. The outer sleeve 274 is fixed to the tool holder 220, and the locking block 271 is located in the slot 212. Under the restoring force of the compression spring 273, the locking block 271 is pressed into the slot 212, so the locking block 271 will not move out of the slot 212. Therefore, the tool holder 220 and the fixed seat 210 can be fixed. When the position of the tool holder 220 needs to be adjusted, the external force is used to overcome the restoring force of the compression spring 273 to push the telescopic rod 275 to move, so that the locking block 271 moves out of the slot 212, thereby allowing relative movement between the tool holder 220 and the fixed seat 210, and realizing the position adjustment of the tool holder 220 on the fixed seat 210.

[0046] Preferably, the end of the outer sleeve 274 furthest from the convex ring 277 is provided with a guide groove 278. The length direction of the guide groove 278 is parallel to the axial direction of the outer sleeve 274. The limiting rod 276 passes through the guide groove 278 and abuts against the compression spring 273 on the outside of the outer sleeve 274. The width of the guide groove 278 is equal to the diameter of the limiting rod 276. The guide groove 278 prevents the telescopic rod 275 from rotating, allowing the locking block 271 to quickly move to the slot 212 and engage with it when adjusting the position of the tool holder 220, thus making the adjustment of the tool holder 220 position more convenient. Furthermore, the limiting rod 276 can only move within the range restricted by the guide groove 278, thus limiting the range of movement of the telescopic rod 275, making the overall structure of the locking structure 270 more compact.

[0047] In a preferred embodiment, the tool holder 220 has a through hole and a positioning groove on the side of the through hole. A positioning block is fixed on the telescopic member 272, which is inserted into the through hole, and the positioning block is placed in the positioning groove. The positioning block is mounted on the outer sleeve 274, which is installed in the through hole of the tool holder 220, thus preventing the outer sleeve 274 from rotating and determining the position of the guide groove 278, thereby determining the position of the locking block 271 relative to the outer sleeve 274.

[0048] See Figure 4-7 and Figure 9In a preferred embodiment, the tool holder 220 includes a mounting plate 221 and a pressure plate 222 fixedly connected to the mounting plate 221. The mounting plate 221 has a first stepped through hole 223. An outer sleeve 274 is placed inside the first stepped through hole 223. The protruding ring 277 of the outer sleeve 274 abuts against the step on the first stepped through hole 223. The end of the outer sleeve 274 away from the protruding ring 277 abuts against the pressure plate 222. The pressure plate 222 has a clearance hole for the telescopic rod 275 to pass through. The outer sleeve 274 is installed in the first stepped through hole 223, and then the pressure plate 222 presses the outer sleeve 274 to fix it. Preferably, the pressure plate 222 and the mounting plate 221 are connected by screws, but in practical applications, fastening or welding can also be used to achieve a fixed connection.

[0049] In this embodiment, the mounting plate 221 is slidably connected to the fixing seat 210, the second blade 281 is fixed on the pressure plate 222, and the second rotating shaft 250, the limiting block 251 and the elastic pad 260 are fixed on the mounting plate 221.

[0050] Preferably, the cross-section of the end of the outer sleeve 274 away from the convex ring 277 is non-circular. The pressure plate 222 is provided with a second stepped through hole 224 that mates with the non-circular end of the outer sleeve 274. Through the setting of the second stepped through hole 224, the pressure plate 222 not only presses the outer sleeve 274 but also positions it. Specifically, the second stepped through hole 224 is set to mate with the non-circular cross-section of the outer sleeve 274. After the pressure plate 222 is installed on the mounting plate 221, the outer wall of the non-circular cross-section of the outer sleeve 274 fits against the inner wall of the second stepped through hole 224, preventing the outer sleeve 274 from rotating. This determines the position of the guide groove 278 on the outer sleeve 274, and consequently, the position of the locking block 271 relative to the outer sleeve 274, thus achieving a positioning function. The second stepped through hole 224 includes a first stepped hole and a second stepped hole. The first stepped hole mates with the non-circular end of the outer sleeve 274, and the second stepped hole forms the aforementioned clearance hole. The clearance hole can pass through the telescopic rod 275 or through a tool used to move the telescopic rod 275.

[0051] In a preferred embodiment, the slide groove 211 has a T-shaped cross-section, and the tool holder 220 is provided with a connecting portion that mates with the slide groove 211. The connecting portion of the tool holder 220 is placed inside the slide groove 211, and the width of the connecting portion is equal to the width of the slide groove 211. Therefore, the tool holder 220 and the fixed seat 210 can only slide relative to each other, but will not wobble. Preferably, the length of the locking block 271 is greater than the width of the slide groove 211. After the locking structure 270 is installed on the tool holder 220, since the telescopic rod 275 cannot rotate, a relatively movable but non-separable integral structure is formed between the tool holder 220 and the fixed seat 210.

[0052] To facilitate the machining of the slide groove 211 and the slot 212, the fixing base 210 can be configured as two symmetrical parts about the length of the slide groove 211, and then the two parts can be fixed together with screws. Both the fixing base 210 and the tool holder 220 are arc-shaped, and their centers coincide with the axis of the rotating shaft 110, so that adjusting the position of the tool holder 220 will not change the distance between the first cutting tool 281, the second cutting tool 282, and the axis of the rotating shaft 110.

[0053] A first mounting groove is provided on the connecting block 240, and the first blade 281 is installed in the first mounting groove. A first screw hole communicating with the first mounting groove is also provided on the side of the connecting block 240 away from the second rotating shaft 250. A first fixing screw for pressing the first blade 281 is threaded into the first screw hole. After the first blade 281 is installed in the first mounting groove, tightening the first fixing screw presses the side of the first blade 281, thus fixing the first blade 281. Similarly, a second mounting groove is provided on the side of the pressure plate 222, and the second blade 282 is installed in the second mounting groove. A second screw hole communicating with the second mounting groove is provided on the side of the pressure plate 222, and a second fixing screw for pressing the second blade 282 is threaded into the second screw hole.

[0054] See Figure 10 and Figure 11 In the grooving machine of this application, there is also a telescopic drive component 130 fixed on the frame 100. When the telescopic end of the telescopic drive component 130 is in the extended state, the telescopic end of the telescopic drive component 130 can push the telescopic rod 275 of the telescopic component 270 to move, so that the locking block 271 is separated from the slot 212. The telescopic drive component 130 can be, but is not limited to, a cylinder, an electric cylinder, or a hydraulic cylinder.

[0055] Specifically, the drive assembly 140, which drives the rotating shaft 110, has an encoder that can detect the shaft position. When it is necessary to adjust the relative position between the fixed base 210 and the tool holder 220, the drive assembly 140 drives the rotating shaft 110 to rotate, so that the telescopic rod 275 of the telescopic member 270 is aligned with the telescopic end of the telescopic drive 130. Then, the telescopic end of the telescopic drive 130 is extended, pushing the telescopic rod 275 of the telescopic member to move, causing the locking block 271 to separate from the slot 212. Then, the drive assembly 140 continues to drive the rotating shaft 110 to rotate. Since the telescopic end of the telescopic drive pushes the telescopic member and is placed inside the outer sleeve of the telescopic member, the tool holder will not rotate with the fixed base, thus achieving the adjustment of the relative position between the tool holder and the fixed base. Through the setting of the telescopic drive, the automatic adjustment of the corner cutting tool position is realized.

[0056] When automatically adjusting the corner cutting blade position, the required distance the corner cutting blade needs to move or the required rotation angle of the shaft needs to be input into the grooving machine's control system. Then, the automatic adjustment steps described above will begin. If the required adjustment distance or angle exceeds the groove width, the position of the fixed base connected to the cutter head can be manually adjusted, and then the encoder's corresponding shaft position can be repositioned.

[0057] In this invention, a first rotating shaft 230 is provided on the blade holder 220, and a connecting block 240 is rotatably connected to the first rotating shaft 230. A first blade 281 is fixed on one side of the connecting block 240. The length direction of the first blade 281 is set at an acute or obtuse angle with the axis of the first rotating shaft 230. An elastic pad 260 is provided on the side of the connecting block 240 away from the first blade 281. The elastic pad 260 is fixed on the blade holder 220. During use, one end of the first blade 281 first contacts the cardboard, and then gradually changes to the other end contacting the cardboard. During this change, when the force position of the first blade 281 changes, the connecting block 240 and the first rotating shaft 230 rotate relative to each other, so that the distance between the position of the blade of the first blade 281 when cutting the cardboard and the axis of the rotating shaft 110 is equal. Therefore, during the cutting of the cardboard, the first blade 281 will not cut the rubber pad 121 on the roller 120, thus not affecting the service life of the rubber pad 121.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A corner cutting tool comprising a tool holder and a first insert, characterized in that, The tool holder is provided with a first rotating shaft, and a connecting block is rotatably connected to the first rotating shaft. The first blade is fixed on one side of the connecting block. The length direction of the first blade is set at an acute or obtuse angle with the axis of the first rotating shaft. An elastic pad is provided on the side of the connecting block away from the first blade, and the elastic pad is fixed on the tool holder. The tool holder is provided with a second rotating shaft, and a mounting plate is rotatably connected to the second rotating shaft. The first rotating shaft is fixed on the mounting plate, and the axis of the second rotating shaft is perpendicular to the axis of the first rotating shaft. A limiting block is fixed on the tool holder to limit the swing range of the mounting seat. The limiting block is used to make the connecting block contact the elastic pad, and the elastic pad also has a certain compressible range. It also includes a fixed base with a sliding groove. The tool holder is slidably connected to the sliding groove of the fixed base. The tool holder is provided with a locking structure for locking the tool holder to the fixed base. The locking structure includes a telescopic component fixed to the tool holder and a locking block fixed to the telescopic end of the telescopic component. The fixed base has slots on both sides of the sliding groove that cooperate with the locking block. The telescopic component includes an outer sleeve, a compression spring, and a telescopic rod. The telescopic rod passes through the center hole of the outer sleeve and is slidably connected to the outer sleeve. The locking block is fixed to one end of the telescopic rod. A limit rod is fixed to the end of the telescopic rod away from the locking block. The outer sleeve has a protruding ring at the end near the locking block. The compression spring is sleeved on the outside of the outer sleeve, and its two ends abut against the protruding ring and the limit rod, respectively. The outer sleeve has a guide groove at the end away from the protruding ring. The limit rod passes through the guide groove and abuts against the compression spring on the outside of the outer sleeve. The tool holder includes a mounting plate and a pressure plate fixedly connected to the mounting plate. The mounting plate has a first stepped through hole, and the outer sleeve is placed in the first stepped through hole. The protruding ring of the outer sleeve abuts against the step on the first stepped through hole. The cross-section of the outer sleeve at the end away from the protruding ring is non-circular. The pressure plate has a second stepped through hole that mates with the non-circular end of the outer sleeve. The second stepped through hole includes a first stepped hole and a second stepped hole. The first stepped hole mates with the non-circular end of the outer sleeve, and the second stepped hole forms a clearance hole.

2. The corner cutting tool of claim 1 wherein, The first rotating shaft has a locking nut for fixing the connecting block threaded to the end away from the mounting plate.

3. The corner cutting tool of claim 1 wherein, The tool holder is equipped with a second blade, the length direction of which is perpendicular to the axis of the first rotating shaft.

4. The corner cutting tool of claim 3 wherein, The mounting plate is slidably connected to the fixed base, and the second blade is fixed on the pressure plate.

5. A slotter, characterized in that The corner cutting blade as described in any one of claims 1-4 includes a frame, a rotating shaft rotatably connected to the frame, and a cutter head fixed to the rotating shaft. The corner cutting blade is fixed to the cutter head, and a drive assembly is drivenly connected to one end of the rotating shaft. The drive assembly is fixed to the frame.

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