Precision cutter shaft blade protection device

Abstract

The utility model discloses a precision cutter shaft blade protection device which comprises a protection cover body, the protection cover body is connected outside a blade on a cutter shaft in a sleeved mode, the protection cover body comprises an upper protection cover and a lower protection cover, and one end of the upper protection cover is rotationally connected with one end of the lower protection cover through a connecting screw assembly. The other end of the upper protective cover and the other end of the lower protective cover are connected and locked through a butterfly screw, an upper lining is installed in the upper protective cover, and a lower lining is installed in the lower protective cover. The blade cutting problem possibly encountered in the blade replacing process of personnel is greatly reduced, use and disassembly are easy, the workload of blade replacement of the personnel cannot be increased, the bush plays a role in protecting the blade, the use quality of the blade cannot be affected, and the device is small and easy to store.

Description

Technical Field

[0001] This utility model relates to the field of blade protection technology, specifically a blade protection device for a precision cutting tool shaft. Background Technology

[0002] The precision cutter used on chemical fiber paper tubes is a crucial component of paper tube precision cutting machines. Most are circular blade precision cutters, characterized by clear outlines, high speed, and excellent cutting results. Their quality and performance directly affect the cutting effect and production efficiency of the paper tubes. Currently, there is no special protection for the blades during the replacement of the precision cutter shaft blades; only employees are required to wear personal protective equipment. However, a certain risk of blade cuts still exists. Especially after replacing the cutter shaft, the locking nut on the side needs to be tightened. During the tapping process, slippage can easily occur, and hands can easily hit the blade, causing cuts. Given the sharpness of the blades, any accident can be very serious. Therefore, how to separate personnel from the blades during replacement and ensure safer blade replacement is an urgent problem to be solved. A precision cutter shaft blade protection device needs to be designed to address these issues. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a blade protection device for a precision cutting tool shaft. By setting a protective cover on the outside of the blade, the blade is protected and the problem of blade cuts that personnel may encounter during blade replacement is greatly reduced.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A precision cutting tool shaft blade protection device includes a protective cover body, which is sleeved on the outside of the blade on the tool shaft. The protective cover body includes an upper cover and a lower cover. One end of the upper cover and the lower cover are rotatably connected by a connecting screw assembly, and the other end of the upper cover and the lower cover are connected and locked by a wing screw. An upper bushing is installed inside the upper cover, and a lower bushing is installed inside the lower cover. Both the upper bushing and the lower bushing have receiving cavities on their inner sides, and the upper bushing and the lower bushing are sleeved on the outside of the blade through the receiving cavities.

[0006] Preferably, one end of the upper cover is fixedly connected to a movable joint, the movable joint has a first through hole through which it passes, the lower cover has a clearance groove for the movable joint to be installed at one end near the movable joint, the lower cover has a second through hole through which it passes at the clearance groove, the second through hole has the same diameter as the first through hole and is coaxially arranged.

[0007] Preferably, the connecting screw assembly includes a hexagon socket head cap screw and a hexagon socket head cap screw, which are respectively disposed on both sides of the lower cover. The hexagon socket head cap screw passes through the second through hole and the first through hole and is threadedly connected to the hexagon socket head cap screw.

[0008] Preferably, a first outer edge connecting piece is fixedly connected to the outer wall of the upper cover at the end away from the movable joint, and a second outer edge connecting piece is fixedly connected to the outer wall of the lower cover at the end near the first outer edge connecting piece. Both the first and second outer edge connecting pieces have coaxially arranged connecting holes, and the wing screws are sequentially connected into the connecting holes of the first and second outer edge connecting pieces to fix them together.

[0009] Preferably, the upper bushing and the lower bushing are made of rubber.

[0010] Preferably, the opening of the receiving cavity is an expansion port structure.

[0011] Preferably, both sides of the outer walls of the upper bushing and the lower bushing are fixedly connected with limit strips, and both sides of the inner walls of the upper cover and the lower cover are provided with limit grooves for the limit strips to be inserted.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model features a protective cover body. By placing an upper cover and a lower cover over the outside of the blade and then closing them, the blade is inserted into the receiving cavity of the upper and lower bushings. A wing screw connects the upper and lower cover to the connecting holes of the first and second outer edge connecting pieces, locking the opening and closing ends of the upper and lower covers in place. This provides protection for the blade, ensuring safety during blade replacement and significantly reducing the risk of cuts. The device is easy to use and disassemble, does not increase the workload of employees during blade replacement, and the bushings also protect the blade without affecting its quality. Furthermore, the device is compact and easy to store. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the precision cutting tool shaft and blade protection device;

[0015] Figure 2 This is a schematic diagram of the main structure of the protective cover;

[0016] Figure 3 This is a schematic diagram of the disassembled structure of the main body of the protective cover;

[0017] Figure 4 This is a schematic diagram of the upper bushing structure;

[0018] Figure 5 This is the main view of the upper bushing;

[0019] Figure 6 A schematic diagram showing the disassembled structure of the upper and lower protective covers and the connecting screw assembly;

[0020] Figure 7 This is a schematic diagram showing the disassembled structure of the upper and lower protective covers and the wing screws.

[0021] In the diagram: 1. Cutter shaft; 2. Blade; 3. Protective cover body; 31. Upper protective cover; 311. Movable joint; 312. First through hole; 313. First outer edge connecting piece; 314. Connecting hole; 32. Lower protective cover; 321. Second through hole; 322. Second outer edge connecting piece; 33. Upper bushing; 331. Receiving cavity; 332. Limiting strip; 34. Lower bushing; 35. Connecting screw assembly; 351. Hex socket head cap screw; 352. Hex socket head cap screw; 36. Wing screw. Detailed Implementation

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Example:

[0024] See also Figures 1-7This embodiment provides a blade protection device for a precision cutting cutter shaft 1, used to protect the blade 2 mounted on the cutter shaft 1. The device includes a protective cover body 3, which is sleeved around the blade 2 on the cutter shaft 1. The protective cover body 3 includes an upper cover 31 and a lower cover 32. One end of the upper cover 31 and the lower cover 32 are rotatably connected by a connecting screw assembly 35, and the other end is connected and locked by a wing screw 36. An upper bushing 33 is installed inside the upper cover 31, and a lower bushing 34 is installed inside the lower cover 32. Both the upper bushing 33 and the lower bushing 34 have receiving cavities 331 on their inner sides. The upper bushing 33 and the lower bushing 34 are connected by... The receiving cavity 331 is fitted onto the outside of the blade 2. During the replacement of the blade 2, the upper cover 31 and the lower cover 32 are rotated open and closed to fit onto the outside of the blade 2. Then, the open and closed ends of the upper cover 31 and the lower cover 32 are locked by the wing screw 36. The upper bushing 33 and the lower bushing 34 are fitted onto the blade 2, thus protecting the blade 2 and providing safety protection during the replacement of the blade. This greatly reduces the risk of blade cuts that personnel may encounter during the replacement of the blade. It is also easy to use and disassemble, and will not increase the workload of employees when replacing the blade. In addition, the bushing also protects the blade and will not affect the quality of the blade.

[0025] In this embodiment, as Figure 3 and Figure 6 As shown, a movable joint 311 is fixedly connected to one end of the upper cover 31. The movable joint 311 is integrally formed with the upper cover 31. A first through hole 312 is provided on the movable joint 311. A clearance groove for the movable joint 311 is provided at one end of the lower cover 32 near the movable joint 311. A second through hole 321 is provided on the lower cover 32 at the clearance groove, which is coaxial with the second through hole 321 and the first through hole 312. The connecting screw assembly 35 includes an internal hexagon socket head cap screw. The nut 351 and the socket head cap screw 352 are respectively located on both sides of the lower cover 32. The socket head cap nut 351 passes through the second through hole 321 and the first through hole 312 and is threadedly connected to the socket head cap screw 352. The connecting screw assembly 35 composed of the socket head cap nut 351 and the socket head cap screw 352 facilitates the rotational connection of one end of the upper cover 31 and the lower cover 32, which can achieve an opening and closing of about 180°, ensuring flexibility.

[0026] In this embodiment, as Figure 3 and Figure 7As shown, a first outer edge connecting piece 313 is fixedly connected to the outer wall of the upper cover 31 at the end away from the movable joint 311. The first outer edge connecting piece 313 is integrally formed with the upper cover 31. A second outer edge connecting piece 322 is fixedly connected to the outer wall of the lower cover 32 at the end near the first outer edge connecting piece 313. The second outer edge connecting piece 322 is integrally formed with the lower cover 32. Both the first outer edge connecting piece 313 and the second outer edge connecting piece 322 have coaxially arranged connecting holes 314. Wing screws 36 are sequentially connected to the connecting holes 314 of the first outer edge connecting piece 313 and the second outer edge connecting piece 322 to fix them together. After the opening and closing ends of the upper cover 31 and the lower cover 32 are closed, the opening and closing ends of the upper cover 31 and the lower cover 32 are locked and closed by connecting the wing screws 36 to the connecting holes 314 of the first outer edge connecting piece 313 and the second outer edge connecting piece 322. The structure is simple and the operation is convenient.

[0027] In this embodiment, the upper bushing 33 and the lower bushing 34 are made of rubber, which provides good protection for the blade 2. The opening of the receiving cavity 331 is an expansion structure, which makes the opening width of the receiving cavity 331 larger, which helps the blade 2 to be inserted into the receiving cavity 331 of the upper bushing 33 and the lower bushing 34 for protection.

[0028] In this embodiment, as Figure 4 and Figure 5 As shown, limiting strips 332 are fixedly connected to both sides of the outer walls of the upper bushing 33 and the lower bushing 34. Limiting grooves for the limiting strips 332 to be inserted are provided on both sides of the inner walls of the upper cover 31 and the lower cover 32. When the upper bushing 33 is installed into the upper cover 31 and the lower bushing 34 is installed into the lower cover 32, the limiting strips 332 on the outer sides of the upper bushing 33 and the lower bushing 34 are aligned and inserted into the limiting grooves of the upper cover 31 and the lower cover 32 to fix the position of the upper bushing 33 and the lower bushing 34, so as to prevent the bushings from falling out of the cover and affecting the use.

[0029] In this embodiment, the dimensions of the upper guard 31 and the lower guard 32 can be adjusted according to the size of the blade 2, using different models as needed. The dimensions of the upper bushing 33 and the lower bushing 34 can also be adjusted as needed to provide protection for multiple models of blades 2 in more situations.

[0030] Working principle: In use, the upper cover 31 and the lower cover 32 are rotated open, then the upper cover 31 and the lower cover 32 are put on the outside of the blade 2 and closed, so that the blade 2 is inserted into the receiving cavity 331 of the upper bushing 33 and the lower bushing 34. It is connected to the connecting hole 314 of the first outer edge connecting piece 313 and the second outer edge connecting piece 322 by the wing screw 36, which is used to lock the opening and closing ends of the upper cover 31 and the lower cover 32, thereby protecting the blade 2 and providing safety protection during the blade replacement process. It greatly reduces the problem of blade cuts that personnel may encounter during the blade replacement process. It is also easy to use and disassemble, and will not increase the workload of employees when replacing blades. In addition, the bushing also protects the blade and will not affect the quality of the blade.

[0031] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A precision cutting tool shaft blade protection device, characterized in that: The device includes a protective cover body (3), which is fitted onto the outside of the blade (2) on the cutter shaft (1). The protective cover body (3) includes an upper cover (31) and a lower cover (32). One end of the upper cover (31) and the lower cover (32) are rotatably connected by a connecting screw assembly (35), and the other end of the upper cover (31) and the lower cover (32) are connected and locked by a wing screw (36). An upper bushing (33) is installed inside the upper cover (31), and a lower bushing (34) is installed inside the lower cover (32). Both the upper bushing (33) and the lower bushing (34) have a receiving cavity (331) on their inner sides. The upper bushing (33) and the lower bushing (34) are fitted onto the outside of the blade (2) through the receiving cavity (331).

2. The precision cutting tool shaft blade protection device according to claim 1, characterized in that: One end of the upper cover (31) is fixedly connected to a movable joint (311). The movable joint (311) has a first through hole (312) through which it passes. The lower cover (32) has a clearance groove for the movable joint (311) to be installed at one end near the movable joint (311). The lower cover (32) has a second through hole (321) through which it passes at the clearance groove. The second through hole (321) and the first through hole (312) have the same diameter and are coaxially arranged.

3. The precision cutting tool shaft blade protection device according to claim 2, characterized in that: The connecting screw assembly (35) includes an internal hexagonal socket head cap screw (351) and an internal hexagonal socket head cap screw (352). The internal hexagonal socket head cap screw (351) and the internal hexagonal socket head cap screw (352) are respectively disposed on both sides of the lower cover (32). The internal hexagonal socket head cap screw (351) passes through the second through hole (321) and the first through hole (312) and is threadedly connected to the internal hexagonal socket head cap screw (352).

4. The precision cutting tool shaft blade protection device according to claim 2, characterized in that: A first outer edge connecting piece (313) is fixedly connected to the outer wall of the upper cover (31) away from the movable joint (311). A second outer edge connecting piece (322) is fixedly connected to the outer wall of the lower cover (32) near the first outer edge connecting piece (313). Both the first outer edge connecting piece (313) and the second outer edge connecting piece (322) have coaxially arranged connecting holes (314). The wing screw (36) is sequentially connected to the connecting holes (314) of the first outer edge connecting piece (313) and the second outer edge connecting piece (322) to fix the two.

5. The precision cutting tool shaft blade protection device according to claim 1, characterized in that: The upper bushing (33) and lower bushing (34) are made of rubber.

6. The precision cutting tool shaft blade protection device according to claim 5, characterized in that: The opening of the receiving cavity (331) is an expansion port structure.

7. A precision cutting tool shaft blade protection device according to claim 6, characterized in that: Limiting strips (332) are fixedly connected to both sides of the outer walls of the upper bushing (33) and the lower bushing (34), and limiting grooves for the limiting strips (332) to be inserted are provided on both sides of the inner walls of the upper cover (31) and the lower cover (32).

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