Knife grinding device

Abstract

The utility model discloses a knife sharpening device which is applied to the field of knife sharpening instruments. Comprising a machine body, a sharpening assembly, a sharpening transmission assembly, a limiting assembly and a position adjusting base. Wherein the knife sharpening transmission assembly is connected with the side wall of the machine body, and the knife sharpening assembly is arranged on the knife sharpening transmission assembly; the position adjusting base is connected with the bottom plate of the machine body, the limiting assembly is arranged at the top of the position adjusting base and used for fixing the to-be-ground cutter to the top of the position adjusting base, and the position adjusting base is used for adjusting the position of the to-be-ground cutter so that the cutting edge of the to-be-ground cutter can be located below the cutter grinding assembly. Therefore, the technical problems that an existing universal knife sharpening tool depends on manual operation, the knife sharpening effect depends on the experience of an operator, standardization is difficult, and the knife sharpening quality is difficult to guarantee are solved.

Description

Technical Field

[0001] The utility model relates to the field of knife sharpening instruments, in particular to a knife sharpening device. Background Art

[0002] Knife sharpening usually relies on general knife sharpening tools. Although these tools can be applicable to various types of knives, their use effects largely depend on the experience and technical level of the operator. Since the blade shapes and materials of different knives are diverse, the operator needs to adjust the sharpening angle, pressure, and sharpening time according to the specific situation of the knife, which makes the sharpening process complex and difficult to standardize. Therefore, even for the same operator, there may be significant differences in the sharpening effect at different times or when dealing with different knives. Traditional knife sharpening tools are mostly handheld or simple mechanical devices. When operating, the operator needs to manually fix the knife and perform sharpening, which not only increases the labor intensity but also makes it difficult to ensure the consistency and accuracy during the sharpening process. In addition, due to the lack of dedicated clamping and adjusting mechanisms for different knives, general knife sharpening tools are difficult to meet the specific sharpening requirements of different knives and are prone to uneven wear or damage to the knives.

[0003] In order to improve the knife sharpening efficiency and effect, some existing knife sharpening devices attempt to introduce automated and standardized designs. However, these devices are often complex in structure, high in cost, and still difficult to solve the problems of knife fixation and adjustment. Since precise control of the position and angle of the knife is required during the knife sharpening process, an efficient knife sharpening device not only needs to have a reliable knife sharpening component but also a flexible and stable knife limiting and adjusting mechanism. Summary of the Utility Model

[0004] The utility model provides a knife sharpening device to solve the technical problems that the existing general knife sharpening tools rely on manual operation, the sharpening effect depends on the operator's experience, and it is difficult to standardize and ensure the sharpening quality.

[0005] The utility model proposes a knife sharpening device, including: a machine body, a knife sharpening component, a knife sharpening transmission component, a limiting component, and a position adjusting seat; wherein, the knife sharpening transmission component is connected to the side wall of the machine body, and the knife sharpening component is arranged on the knife sharpening transmission component; the position adjusting seat is connected to the bottom plate of the machine body, the limiting component is arranged on the top of the position adjusting seat, the limiting component is used to fix the knife to be sharpened on the top of the position adjusting seat, and the position adjusting seat is used to adjust the position of the knife to be sharpened so that the blade of the knife to be sharpened is located below the knife sharpening component.

[0006] Preferably, the knife sharpening component includes a fixed seat, a reciprocating mechanism, a grinding motor, and a grinding structure. The grinding motor is connected to the fixed seat through the reciprocating mechanism. The reciprocating mechanism is used to adjust the horizontal height of the grinding motor. The grinding structure is connected to the transmission rod of the grinding motor, and the fixed seat is connected to the knife sharpening transmission component.

[0007] Preferably, the knife grinding drive assembly includes a reduction motor, a linkage shaft, a screw rod and a limiting rod; wherein, the screw rod and the limiting rod are arranged in parallel on the machine body, the fixed seat is respectively connected to the limiting rod and the screw rod, the reduction motor is connected to the screw rod through the linkage shaft, and the reduction motor is used to control the rotation of the screw rod to drive the fixed seat to move axially along the limiting rod.

[0008] Preferably, proximity switches are arranged at both ends of the limiting rod, the knife grinding drive assembly further includes a control panel, the proximity switches and the reduction motor are respectively electrically connected to the control panel, and the control panel is used to detect the position of the fixed seat through the proximity switches to control the forward or reverse rotation of the reduction motor.

[0009] Preferably, the reciprocating mechanism includes a guide rail, a slider, a lifting rod, a motor fixing seat and an adjusting assembly; an adjusting plate is arranged on the fixed seat, the guide rail is connected to the fixed seat, the slider is slidably arranged on the guide rail, the motor fixing seat is connected to the slider, and the lifting rod is connected to the adjusting assembly after passing through the limiting hole on the adjusting plate; the adjusting assembly is used to adjust the distance between the lifting rod and the adjusting plate to adjust the horizontal height of the slider.

[0010] Preferably, the adjusting assembly is a push-pull type quick clamp, the base of the push-pull type quick clamp is connected to the adjusting plate, the telescopic end of the push-pull type quick clamp is connected to the lifting rod, and a spring is arranged on the outer circumference of the lifting rod between the slider and the adjusting plate.

[0011] Preferably, the limiting assembly includes a fixed clamp and a limiting plate, the fixed clamp is connected to the top of the position adjusting seat, the limiting plate is arranged on the top of the fixed clamp, and the fixed clamp is used to fix the tool to be ground between the top of the position adjusting seat and the limiting plate.

[0012] Preferably, the position adjusting seat includes a depth adjusting assembly and an oblique angle adjusting assembly; wherein, the depth adjusting assembly includes a depth adjusting threaded rod, a box-type slider, a depth adjusting handle, a limiting adjusting plate and two groups of parallel guide rails, the two guide rails are longitudinally arranged on the bottom plate of the machine body, the box-type slider is respectively sleeved on the two groups of guide rails, the limiting adjusting plate is connected to the box-type slider, the depth adjusting threaded rod is arranged in the box-type slider, the depth adjusting threaded rod is connected to the machine body through a bearing, the depth adjusting handle is connected to the end of the depth adjusting threaded rod away from the box-type slider, and the oblique angle adjusting assembly is connected to the top of the limiting adjusting plate.

[0013] Preferably, the bevel angle adjustment assembly includes a bevel angle adjustment screw, a rotating structure, a limit seat, a bevel angle adjustment slider and a bevel angle adjustment plate. The limit seat is connected to the top of the limit adjustment plate. The bevel angle adjustment screw is rotatably connected to the limit seat. The bevel angle adjustment slider is sleeved on the outer periphery of the bevel angle adjustment screw and its bottom is in contact with the limit adjustment plate. The bevel angle adjustment plate is rotatably connected to the limit adjustment plate through the rotating structure. A bevel support adapted to the bevel angle adjustment slider is provided at the bottom of the bevel angle adjustment plate. When the bevel angle adjustment screw rotates, the bevel angle adjustment slider slides longitudinally back and forth under the limit of the limit adjustment plate and makes the bevel angle adjustment plate rotate around the rotating structure by abutting against the bevel support.

[0014] Beneficial effects: Through the position adjustment seat and the limit assembly, the position of the tool to be sharpened can be accurately adjusted and fixed, ensuring the best contact between the cutting edge and the sharpening assembly, reducing the dependence on the operator's experience, and ensuring the consistency of the sharpening quality; the design of the position adjustment seat and the limit assembly makes the fixation and position adjustment of the tool to be sharpened more convenient, simplifies the sharpening process, and reduces the operation difficulty; it can adapt to different types and sizes of tools, flexibly adjust the tool position through the position adjustment seat, meet various sharpening needs, and improve the versatility of the device; the limit assembly firmly fixes the tool to be sharpened, prevents the tool from shifting or loosening during the sharpening process, improves the stability and safety of the sharpening process, and reduces the risk of accidental damage to the tool; the sharpening drive assembly is connected to the side wall of the fuselage, realizing the automation of the sharpening process, reducing manual operation, and improving the sharpening efficiency; each component is reasonably arranged, making the overall structure of the device compact, saving space, and facilitating storage and use. This sharpening device not only improves the sharpening efficiency and quality, but also improves the operation convenience and safety, and adapts to diverse sharpening needs; thus solving the technical problems of the existing general sharpening tools relying on manual operation, the sharpening effect depending on the operator's experience, and being difficult to standardize and ensure the sharpening quality. Description of the Drawings

[0015] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the sharpening device proposed in the embodiment of the present invention;

[0017] Figure 2 is a partial structural diagram of the sharpening device proposed in the embodiment of the present invention;

[0018] Figure 3 is a schematic structural diagram of the position adjustment seat proposed in the embodiment of the present invention.

[0019] Icons: 10 - Knife sharpening device; 11 - Body; 12 - Knife sharpening component; 13 - Knife sharpening drive component; 14 - Limiting component; 15 - Position adjustment seat; 16 - Fixed seat; 17 - Reciprocating mechanism; 18 - Grinding motor; 19 - Polishing structure; 20 - Reduction motor; 21 - Linkage shaft; 22 - Screw; 23 - Limiting rod; 24 - Proximity switch; 25 - Control panel; 26 - Guide rail; 27 - Slide block; 28 - Lifting rod; 29 - Motor fixing seat; 30 - Adjustment component; 31 - Adjustment plate; 32 - Fixed clamp; 33 - Limiting plate; 34 - Depth adjustment component; 35 - Bevel angle adjustment component; 36 - Depth adjustment threaded rod; 37 - Box - type slide block; 38 - Depth adjustment handle; 39 - Limiting adjustment plate; 40 - Guide rail; 41 - Bevel angle adjustment screw; 42 - Rotating structure; 43 - Limiting seat; 44 - Bevel angle adjustment slide block; 45 - Bevel angle adjustment plate; 46 - Inclined support. Detailed implementation mode

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the accompanying drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0021] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] Embodiment 1

[0023] Please refer to Figures 1 to 3 , a knife sharpening device 10 proposed in an embodiment of the present invention, includes: a body 11, a knife sharpening component 12, a knife sharpening drive component 13, a limiting component 14, and a position adjustment seat 15; wherein, the knife sharpening drive component 13 is connected to the side wall of the body 11, and the knife sharpening component 12 is arranged on the knife sharpening drive component 13; the position adjustment seat 15 is connected to the bottom plate of the body 11, the limiting component 14 is arranged on the top of the position adjustment seat 15, the limiting component 14 is used to fix the knife to be sharpened on the top of the position adjustment seat 15, and the position adjustment seat 15 is used to adjust the position of the knife to be sharpened so that the blade of the knife to be sharpened is below the knife sharpening component 12.

[0024] During specific implementation, the fuselage 11 is the support main body of the overall structure, providing the basic framework and support function for the knife sharpening device 10; a side wall is provided on one side of the fuselage 11, and the side wall is used to install the knife sharpening transmission assembly 13, and the knife sharpening assembly 12 is arranged on the knife sharpening transmission assembly 13. The position adjustment seat 15 is connected to the bottom plate of the fuselage 11, and the position of the limit assembly 14 is adjusted through the position adjustment seat 15 to adapt to the grinding requirements of different tools. The limit assembly 14 is arranged on the top of the position adjustment seat 15 and is used to fix the tool to be sharpened on the position adjustment seat 15. When in use, first fix and adjust the tool to be sharpened to a suitable position through the position adjustment seat 15 and the limit assembly 14 to ensure that the cutting edge is located below the grinding wheel. Start the knife sharpening assembly 12 to grind the cutting edge of the tool. The adjustment mechanism of the position adjustment seat 15 can flexibly adjust the position of the tool according to the different shapes and sizes of the tools to achieve the best grinding effect; through the reasonable design of the position adjustment seat 15 and the limit assembly 14, the precise fixation and position adjustment of the tool are realized, ensuring the accuracy and consistency of knife sharpening, simplifying the operation process, and improving the knife sharpening efficiency and safety.

[0025] Preferably, the knife sharpening transmission assembly 13 includes a reduction motor 20, a linkage shaft 21, a screw rod 22 and a limit rod 23. The screw rod 22 and the limit rod 23 are arranged in parallel on the fuselage 11, and the fixing seat 16 is respectively connected to the limit rod 23 and the screw rod 22. The reduction motor 20 is connected to the screw rod 22 through the linkage shaft 21, and the reduction motor 20 is used to control the rotation of the screw rod 22 to drive the fixing seat 16 to move axially along the limit rod 23. Proximity switches 24 are arranged at both ends of the limit rod 23, and the knife sharpening transmission assembly 13 further includes a control panel 25. The proximity switches 24 and the reduction motor 20 are respectively electrically connected to the control panel 25, and the control panel 25 is used to detect the position of the fixing seat 16 through the proximity switches 24 to control the forward or reverse rotation of the reduction motor 20.

[0026] The knife sharpening assembly 12 includes a fixing seat 16, a reciprocating mechanism 17, a grinding motor 18 and a grinding structure 19. The grinding motor 18 is connected to the fixing seat 16 through the reciprocating mechanism 17, and the reciprocating mechanism 17 is used to adjust the horizontal height of the grinding motor 18. The grinding structure 19 is connected to the transmission rod of the grinding motor 18, and the fixing seat 16 is connected to the knife sharpening transmission assembly 13.

[0027] The reciprocating mechanism 17 includes a guide rail 26, a slider 27, a lifting rod 28, a motor fixing seat 29, and an adjusting assembly 30. An adjusting plate 31 is provided on the fixing seat 16. The guide rail 26 is connected to the fixing seat 16. The slider 27 is slidably disposed on the guide rail 26. The motor fixing seat 29 is connected to the slider 27. The lifting rod 28 passes through the limiting hole on the adjusting plate 31 and is connected to the adjusting assembly 30. The adjusting assembly 30 is used to adjust the distance between the lifting rod 28 and the adjusting plate 31 to adjust the horizontal height of the slider 27. The adjusting assembly 30 is preferably a push-pull type quick clamp. The base of the push-pull type quick clamp is connected to the adjusting plate 31, and the telescopic end of the push-pull type quick clamp is connected to the lifting rod 28. A spring is provided on the outer periphery of the lifting rod 28 between the slider 27 and the adjusting plate 31 to provide elastic support and buffering.

[0028] Among them, the position adjusting seat 15 is connected to the bottom plate of the fuselage 11, and its position is adjusted by an adjusting mechanism to adapt to the grinding requirements of different tools. The adjusting mechanism adopts a screw adjusting device. By rotating the handle, the position adjusting seat 15 is moved up and down or back and forth to ensure that the cutting edge is accurately located below the grinding wheel.

[0029] The limiting assembly 14 is arranged on the top of the position adjusting seat 15 and is used to fix the tool to be ground on the position adjusting seat 15. The limiting assembly 14 includes a clamping mechanism and a fixing plate. The clamping mechanism can realize the fastening and loosening of the tool through screw adjustment, and the fixing plate is used to support the tool.

[0030] During use, first, the tool to be ground is fixed and adjusted to a suitable position through the position adjusting seat 15 and the limiting assembly 14 to ensure that the cutting edge is located below the grinding structure 19. Start the grinding motor 18, and adjust the horizontal height of the grinding motor 18 through the reciprocating mechanism 17 to make the grinding structure 19 contact the cutting edge and perform grinding. Through the adjusting mechanism of the position adjusting seat 15, the position of the tool can be flexibly adjusted according to the different shapes and sizes of the tools to achieve the best grinding effect. The sharpening device 10 of this embodiment realizes the precise fixing and position adjustment of the tool through the reasonable design of the position adjusting seat 15 and the limiting assembly 14, ensures the accuracy and consistency of sharpening, simplifies the operation process, improves the sharpening efficiency and safety, and is applicable to the grinding of various types of tools.

[0031] Embodiment 2

[0032] On the basis of Embodiment 1, in order to better understand the technical solution of the present utility model, the present utility model will be further described in detail below in conjunction with specific embodiments; among them, the position adjustment seat 15 includes a depth adjustment component 34 and an oblique angle adjustment component 35. The depth adjustment component 34 includes a depth adjustment threaded rod 36, a box-shaped slider 37, a depth adjustment handle 38, a limit adjustment plate 39, and two groups of parallel guide rails 40. The two guide rails 40 are longitudinally arranged on the bottom plate of the fuselage 11, and the box-shaped sliders 37 are respectively sleeved on the two groups of guide rails 40, and the limit adjustment plate 39 is connected to the box-shaped slider 37. The depth adjustment threaded rod 36 passes through the box-shaped slider 37 and is connected to the fuselage 11 through a bearing, and the depth adjustment handle 38 is connected to the end of the depth adjustment threaded rod 36 away from the box-shaped slider 37. An internal thread adapted to the depth adjustment threaded rod 36 is provided in the box-shaped slider 37, so as to drive the box-shaped slider 37 to move back and forth in the depth direction when the depth adjustment threaded rod 36 rotates. The oblique angle adjustment component 35 is connected to the top of the limit adjustment plate 39. Among them, it can be clearly seen that the depth adjustment threaded rod 36 can be connected to the fuselage 11 through a spherical bearing seat; at the same time, it can be clearly seen that the position adjustment seat 15 may further include a nut seat, the depth adjustment threaded rod 36 does not pass through the box-shaped slider 37, and the box-shaped slider 37 is only used to fix the limit adjustment plate 39; the depth adjustment threaded rod 36 passes through the nut seat, and similarly, the nut seat is connected to the limit adjustment plate 39 and an internal thread adapted to the depth adjustment threaded rod 36 is provided inside, so as to drive the box-shaped slider 37 to move back and forth in the depth direction when the depth adjustment threaded rod 36 rotates.

[0033] The oblique angle adjustment component 35 includes an oblique angle adjustment screw 41, a rotating structure 42, a limit seat 43, an oblique angle adjustment slider 44, and an oblique angle adjustment plate 45. The limit seat 43 is connected to the top of the limit adjustment plate 39, the oblique angle adjustment screw 41 is rotatably connected to the limit seat 43, the oblique angle adjustment slider 44 is sleeved on the outer periphery of the oblique angle adjustment screw 41 and the bottom thereof is attached to the limit adjustment plate 39. The oblique angle adjustment plate 45 is rotatably connected to the limit adjustment plate 39 through the rotating structure 42, and an oblique support 46 adapted to the oblique angle adjustment slider 44 is provided at the bottom of the oblique angle adjustment plate 45. The oblique angle adjustment slider 44 longitudinally slides back and forth under the limit of the limit adjustment plate 39 when the oblique angle adjustment screw 41 rotates, and makes the oblique angle adjustment plate 45 rotate around the rotating structure 42 by abutting against the oblique support 46.

[0034] The limit component 14 includes a fixed clamp 32 and a limit plate 33. The fixed clamp 32 is connected to the top of the position adjustment seat 15, the limit plate 33 is arranged on the top of the fixed clamp 32, and the fixed clamp 32 is used to fix the tool to be ground provided between the top of the position adjustment seat 15 and the limit plate 33.

[0035] In use, first, the tool to be ground is fixed and adjusted to a suitable position through the position adjustment seat 15 and the limit component 14, ensuring that the blade is located below the grinding structure 19. Start the grinding motor 18, and adjust the horizontal height of the grinding motor 18 through the reciprocating mechanism 17 to make the grinding structure 19 contact the blade and perform grinding. Through the depth adjustment component 34 and the bevel angle adjustment component 35 of the position adjustment seat 15, the position and angle of the tool can be flexibly adjusted according to the different shapes and sizes of the tool to achieve the best grinding effect.

[0036] For the knife sharpening device 10 of this embodiment, through the reasonable design of the position adjustment seat 15 and the limit component 14, the precise fixation and position adjustment of the tool are realized, ensuring the accuracy and consistency of knife sharpening, simplifying the operation process, improving the knife sharpening efficiency and safety, and being applicable to the grinding of various types of tools. It is clear that a polishing motor and / or a water pump motor are also included. The polishing motor and / or the water pump motor are connected to the fuselage 11. The polishing motor is used for polishing the tool to be ground after knife sharpening, and the water pump motor is used for cooling and cleaning when the tool to be ground is being sharpened.

[0037] In summary, the above are only the preferred embodiments of the present invention and are not used to limit the scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the present invention.

Claims

1. A knife sharpening device, characterized in that: include: A machine body, a knife sharpening assembly, a knife sharpening transmission assembly, a limit assembly and a position adjustment seat; wherein the knife sharpening transmission assembly is connected to the side wall of the machine body, and the knife sharpening assembly is arranged on the knife sharpening transmission assembly; the position adjustment seat is connected to the bottom plate of the machine body, and the limit assembly is arranged on the top of the position adjustment seat, and the limit assembly is used to fix the tool to be sharpened on the top of the position adjustment seat, and the position adjustment seat is used to adjust the position of the tool to be sharpened so that the blade of the tool to be sharpened is below the knife sharpening assembly.

2. The knife sharpening device according to claim 1, characterized in that: The knife sharpening assembly includes a fixed seat, a reciprocating mechanism, a grinding motor and a grinding structure. The grinding motor is connected to the fixed seat through the reciprocating mechanism. The reciprocating mechanism is used to adjust the horizontal height of the grinding motor. The grinding structure is connected to the transmission rod of the grinding motor. The fixed seat is connected to the knife sharpening transmission assembly.

3. The knife sharpening device according to claim 2, characterized in that: The knife sharpening transmission assembly includes a reduction motor, a linkage shaft, a screw and a limit rod; wherein the screw and the limit rod are arranged parallel to the body, the fixed seat is connected to the limit rod and the screw respectively, the reduction motor is connected to the screw through the linkage shaft, and the reduction motor is used to control the rotation of the screw to drive the fixed seat to move along the axial direction of the limit rod.

4. The knife sharpening device according to claim 3, characterized in that: Proximity switches are provided at both ends of the limit rod, and the sharpening transmission assembly also includes a control panel. The proximity switch and the reduction motor are electrically connected to the control panel respectively, and the control panel is used to control the forward or reverse rotation of the reduction motor by detecting the position of the fixing seat through the proximity switch.

5. The knife sharpening device according to claim 2, characterized in that: The reciprocating mechanism includes a guide rail, a slider, a lifting rod, a motor fixing seat and an adjustment component, the fixing seat is provided with an adjustment plate, the guide rail is connected to the fixing seat, the slider is slidably arranged on the guide rail, the motor fixing seat is connected to the slider, the lifting rod passes through the limiting hole on the adjustment plate and is connected to the adjustment component; the adjustment component is used to adjust the distance between the lifting rod and the adjustment plate to adjust the horizontal height of the slider.

6. The knife sharpening device according to claim 5, characterized in that: The adjustment component is a push-pull quick clamp, the base of which is connected to the adjustment plate, the telescopic end of which is connected to the lifting rod, and a spring is arranged on the periphery of the lifting rod between the slider and the adjustment plate.

7. The knife sharpening device according to claim 1, characterized in that: The limiting assembly includes a fixing clamp and a limiting plate, wherein the fixing clamp is connected to the top of the position adjustment seat, and the limiting plate is arranged on the top of the fixing clamp, and the fixing clamp is used to fix the tool to be sharpened between the top of the position adjustment seat and the limiting plate.

8. The knife sharpening device according to claim 1, characterized in that: The position adjustment seat includes a depth adjustment component and a bevel adjustment component; wherein, the depth adjustment component includes a depth adjustment threaded rod, a box-type slider, a depth adjustment handle, a limit adjustment plate and two groups of parallel guide rails, the two guide rails are longitudinally arranged on the bottom plate of the fuselage, the box-type slider is respectively sleeved on the two groups of guide rails, the limit adjustment plate is connected to the box-type slider, the depth adjustment threaded rod is passed through the box-type slider, the depth adjustment threaded rod is connected to the fuselage through a bearing, the depth adjustment handle is connected to one end of the depth adjustment threaded rod away from the box-type slider, and the bevel adjustment assembly is connected to the top of the limit adjustment plate.

9. The knife sharpening device according to claim 8, characterized in that: The bevel adjustment assembly includes a bevel adjustment screw, a rotating structure, a limit seat, a bevel adjustment slider and a bevel adjustment plate, the limit seat is connected to the top of the limit adjustment plate, the bevel adjustment screw is rotatably connected to the limit seat, the bevel adjustment slider is sleeved on the outer circumference of the bevel adjustment screw and the bottom is in contact with the limit adjustment plate, the bevel adjustment plate is rotatably connected to the limit adjustment plate through the rotating structure, and the bottom of the bevel adjustment plate is provided with an oblique support adapted to the bevel adjustment slider. When the bevel adjustment screw rotates, the bevel adjustment slider is limited by the limit adjustment plate and slides longitudinally forward and backward, and the bevel adjustment plate rotates around the rotating structure by supporting the oblique support.

Images