Tool sharpener
By designing an adjustable-angle and adjustable-height grinding device and a rotary fixture, the high cost of existing grinding machines has been solved, enabling efficient processing and low-cost promotion of small, lightweight cutting tools with small curvature.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-03
AI Technical Summary
Existing sharpening machines are expensive and difficult to promote, especially for small, light, and small cutting tools with small curvatures that are in high demand in the market, where the processing effect is not ideal.
A grinding machine comprising a frame, a grinding device, and a tool holder is designed. The grinding device is movably mounted on the frame. The motor is rotatably connected to the frame to adjust the pitch angle and height of the grinding workpiece. The clamp of the tool holder can rotate to adjust the swing angle of the cutting edge. The machining of arc-shaped structures is achieved through the cooperation of the clamp and the rotary table.
It enables efficient machining of small-radius, lightweight cutting tools, reduces equipment costs, simplifies the structure, and lowers the difficulty of promotion.
Smart Images
Figure CN223961004U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of knife sharpening equipment technology, and in particular to a knife sharpening machine. Background Technology
[0002] Knives are essential tools for millions of households, the catering industry, and food processing plants. Traditional knife sharpening machines usually use multi-axis CNC equipment to grind knives. Although such equipment can sharpen knives well, it is too expensive. Taking Yangjiang, the knife capital, as an example, a single CNC machine costs more than 100,000 yuan and weighs several tons. Its cost is difficult for some small and medium-sized knife factories to accept.
[0003] For some knives with high market demand, such as household knives, chef's knives, boning knives, peeling knives, pointed knives, and grafting knives, which account for 90% of the market demand, they all have one thing in common: a slight curvature, or only the blade part is curved. Conventional equipment cannot process this part or the processing effect is not ideal, while the processing cost of using large CNC equipment is difficult to control. Therefore, there is an urgent need for a simple and inexpensive device to solve the above problems. Utility Model Content
[0004] The main purpose of this utility model is to propose a knife sharpening machine that aims to solve the problems of high cost and difficulty in promotion of existing knife sharpening machines.
[0005] To achieve the above objectives, the grinding machine proposed in this utility model includes:
[0006] frame;
[0007] A sharpening device is movably mounted on the frame along a first direction. The sharpening device includes a motor and a grinding element mounted on the motor. The motor is rotatably connected to the frame to adjust the pitch angle of the grinding element, and the motor is also height-adjustable on the frame to adjust the height of the grinding element. The motor drives the grinding element to rotate for sharpening the tool to be sharpened.
[0008] The tool holder includes a rotary table and a clamp for holding a tool to be sharpened. The clamp is rotatably mounted on the rotary table to adjust the swing angle of the cutting edge of the tool to be sharpened. The rotary table is movably mounted on the frame along a second direction to drive the clamp to move along the second direction so that the grinding surface of the grinding workpiece contacts the cutting edge of the tool to be sharpened. The first direction and the second direction form an angle.
[0009] In one embodiment, the rotary table includes a first connecting part and a second connecting part, the first connecting part being movably disposed on the frame, the second connecting part being rotatably connected to the first connecting part, and the clamp being connected to the second connecting part.
[0010] In one embodiment, the tool holder further includes a locking member, which is movably disposed on the clamp and separably disposed from the first connecting portion. The locking member is used to abut against the first connecting portion to restrict the clamp from rotating relative to the first connecting portion.
[0011] In one embodiment, the locking member includes a first handle and a screw connected to the first handle. The clamp has a screw hole at a position facing the outer wall of the first connecting part, and one end of the screw away from the first handle passes through the screw hole to abut against the first connecting part.
[0012] In one embodiment, the tool holder further includes a movable member disposed on the side of the rotary table away from the fixture. The frame is provided with a first guide rail and a first lead screw spaced apart along the second direction. The movable member is provided with a guide hole and a lead screw nut. The first guide rail passes through the guide hole, and the first lead screw passes through the lead screw nut. The first lead screw is used to rotate to drive the movable member to move along the second direction.
[0013] In one embodiment, a second guide rail is provided on the frame along the first direction, and the grinding device further includes a mounting base and an adjusting base rotatably connected to the mounting base. The mounting base is movably disposed on the second guide rail, and the motor is mounted on the adjusting base. The adjusting base is used to rotate on the mounting base to adjust the grinding angle of the grinding workpiece.
[0014] In one embodiment, the adjusting seat or the mounting seat is further provided with a second handle, which is used to lock the adjusting seat onto the mounting seat or loosen the connection between the adjusting seat and the mounting seat;
[0015] And / or, the adjustment seat is further provided with an angle display, which is used to display the angular position of the grinding workpiece.
[0016] In one embodiment, the sharpening machine further includes an angle adjustment mechanism, which includes a bracket, a pulley, a connecting rope, and a second lead screw mounted on the bracket. The bracket is mounted on the mounting base. One end of the connecting rope is connected to the adjustment base, and the other end of the connecting rope is connected to the second lead screw around the pulley. The second lead screw is used to drive the adjustment base to rotate via the connecting rope.
[0017] In one embodiment, the grinding machine further includes a height adjustment mechanism, which includes a lifting seat, a third guide rail, and a third lead screw. The third guide rail is disposed on the adjustment seat, the lifting seat is movably disposed on the third guide rail, the motor is disposed on the lifting seat, and the third lead screw is disposed on the adjustment seat and drivenly connected to the lifting seat. The third lead screw is used to drive the lifting seat to move on the third guide rail to adjust the height of the grinding workpiece.
[0018] In one embodiment, the height adjustment mechanism further includes an elastic element, one end of which is connected to one end of the third lead screw, and the other end of which is connected to the lifting seat.
[0019] The technical solution of this utility model adopts a tool holder with a rotating function, which enables the tool to process arc-shaped structures and reduces the cost of the sharpening machine. Specifically, the sharpening machine includes a frame, a sharpening device, and a tool holder. The sharpening device is movably mounted on the frame along a first direction. The sharpening device includes a motor and a grinding element mounted on the motor. The motor is rotatably connected to the frame to adjust the pitch angle of the grinding element, and the motor can be raised and lowered on the frame to adjust the height of the grinding element. The tool holder includes a rotary table and a clamp mounted on the rotary table. The clamp is used to hold the tool to be sharpened. The clamp rotates on the rotary table to adjust the swing angle of the tool's cutting edge. The rotary table is movably mounted on the frame along a second direction to drive the clamp to move closer to or away from the grinding element. The first direction and the second direction form an angle.
[0020] Understandably, after the tool to be sharpened is fixed on the fixture, its cutting edge is placed along the first direction. The motor drives the grinding workpiece to move along the first direction. The pitch angle and height of the grinding workpiece can be adjusted to process the cutting edge. Furthermore, the operating fixture rotates on the rotary table to make the cutting edge of the tool to be sharpened swing, which facilitates the processing of the arc-shaped cutting edge of the grinding workpiece. Moreover, the sharpening machine has a simple structure and small size, which helps to control costs and reduce the difficulty of promotion. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0022] Figure 1 This is a front view of an embodiment of the sharpening machine provided by this utility model;
[0023] Figure 2 Right view of an embodiment of the sharpening machine provided by this utility model;
[0024] Figure 3 for Figure 2 A magnified view of the location indicated by arrow A in the middle;
[0025] Figure 4 This is a top view of the rotary table and moving parts on the frame in one embodiment of the sharpening machine provided by this utility model;
[0026] Figure 5 A top view of the fixture rotating on a rotary table in one embodiment of the sharpening machine provided by this utility model;
[0027] Figure 6 A schematic diagram of the angle adjustment mechanism in one embodiment of the sharpening machine provided by this utility model;
[0028] Figure 7 This is a schematic diagram of another embodiment of the sharpening machine provided by this utility model.
[0029] Explanation of icon numbers:
[0030] 100. Sharpening machine; 1. Frame; 11. First guide rail; 12. First lead screw; 13. Handwheel; 14. Second guide rail; 2. Sharpening device; 21. Motor; 22. Grinding part; 23. Mounting base; 24. Adjusting base; 241. Angle display; 25. Second handle; 3. Tool holder; 31. Rotary table; 311. First connecting part; 312. Second connecting part; 32. Clamp; 33. Locking element; 331. First handle; 332. Screw; 34. Moving part; 4. Angle adjustment mechanism; 41. Bracket; 42. Pulley; 43. Second lead screw; 44. Connecting rope; 5. Height adjustment mechanism; 51. Lifting base; 52. Third guide rail; 53. Third lead screw; 54. Elastic element; 200. Tool to be sharpened.
[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0035] This utility model proposes a knife grinding machine 100.
[0036] Please see Figure 1 and Figure 2 The sharpening machine 100 includes a frame 1, a sharpening device 2, and a tool holder 3. The sharpening device 2 is movably mounted on the frame 1 along a first direction. The sharpening device 2 includes a motor 21 and a grinding element 22 mounted on the motor 21. The motor 21 is rotatably connected to the frame 1 to adjust the pitch angle of the grinding element 22, and the motor 21 is also height-adjustable on the frame 1 to adjust the height of the grinding element 22. The tool holder 3 includes a rotary table 31 and a clamp 32 mounted on the rotary table 31. The clamp 32 is used to hold the tool 200 to be sharpened. Further reference... Figure 5 The clamp 32 rotates on the rotary table 31 to adjust the swing angle of the cutting edge of the tool, and the rotary table 31 is movably set on the frame 1 along the second direction to drive the clamp 32 to move towards or away from the grinding workpiece 22. The first direction and the second direction form an angle.
[0037] Understandably, after the tool 200 to be sharpened is fixed on the fixture 32, its cutting edge is positioned along the first direction. The motor 21 drives the grinding piece 22 to move along the first direction. Adjusting the pitch angle and height of the grinding piece 22 can grind the cutting edge. Furthermore, the fixture 32 is rotated on the rotary table 31 to make the cutting edge of the tool 200 to be sharpened swing relative to the grinding piece 22. It should be noted that the grinding piece 22 can be used for grinding some knives with a large market share, such as household knives, chef's knives, boning knives, peeling knives, pointed knives, grafting knives, and other small curved knives.
[0038] As can be seen from the above, the grinding machine 100 proposed in this solution has a simple structure and small size, which is beneficial for cost control and reducing the difficulty of promotion. In this embodiment, the first direction and the second direction are arranged perpendicularly. In other embodiments of this utility model, the included angle between the first direction and the second direction is not specifically limited.
[0039] In one embodiment, the rotary table 31 includes a first connecting part 311 and a second connecting part 312. The first connecting part 311 is movably disposed on the frame 1, and the second connecting part 312 is rotatably connected to the first connecting part 311. The clamp 32 is connected to the second connecting part 312.
[0040] like Figures 3 to 5 As shown, in one embodiment of this utility model, the rotary table 31 includes a first connecting portion 311 and a second connecting portion 312. The rotary table 31 is circular in shape, and the first connecting portion 311 and the second connecting portion 312 are annular structures. The second connecting portion 312 is rotatably fitted into the first connecting portion 311, and their axes coincide. The first connecting portion 311 is movably mounted on the frame 1 along a second direction. The clamp 32 is located above the rotary table 31 and connected to the second connecting portion 312. Figure 5 As shown, the operator can adjust the swing angle of the cutting edge of the tool 200 to be ground by rotating the fixture 32 on the rotary table 31.
[0041] It should be noted that the first connecting part 311 is movably mounted on the frame 1, and there are various ways to achieve this. For example, a slide groove can be opened on the frame 1 along the second direction, and the rotary table 31 can be placed in the slide groove to slide. Alternatively, a guide rail can be set on the frame 1 along the second direction, and the first connecting part 311 can be slidably mounted on the guide rail. Both methods can achieve the movement of the rotary table 31. The specific implementation method is not limited. Furthermore, the structures of the first connecting part 311 and the second connecting part 312 can also be arranged in an overlapping manner along the height direction of the frame 1. The specific structure is also not limited and can be set according to actual needs.
[0042] In one embodiment, the tool holder 3 further includes a locking member 33, which is movably disposed on the clamp 32 and separable from the first connecting portion 311. The locking member 33 is used to abut against the first connecting portion 311 to restrict the clamp 32 from rotating relative to the first connecting portion 311.
[0043] like Figure 1 and Figure 2 As shown, the tool holder 3 also includes a locking member 33. Specifically, the first connecting part 311 of the rotary table 31 can only move along the second direction on the frame 1 but cannot rotate around its axis. The locking member 33 is movably mounted on the fixture 32 and can be separated from the first connecting part 311. When the locking member 33 is connected to the first connecting part 311, the fixture 32 is fixed relative to the first connecting part 311 and cannot rotate on the rotary table 31. When the locking member 33 is separated from the first connecting part 311, the fixture 32 can rotate relative to the first connecting part 311. The locking member 33 is used to lock the fixture 32 on the rotary table 31 when the grinding workpiece 22 is processing the tool 200 to be ground, maintaining the contact stability between the grinding workpiece 22 and the tool 200 to be ground, and ensuring the grinding quality.
[0044] It should be noted that the locking component 33 can be made of pins, bolts, snap rings, or other components to ensure that the clamp 32 can be locked onto the rotary table 31. The appropriate component can be selected according to the requirements.
[0045] In one embodiment, the locking member 33 includes a first handle 331 and a screw 332 connected to the first handle 331. The clamp 32 is provided with a screw hole at a position facing the outer side wall of the first connecting part 311. One end of the screw 332 away from the first handle 331 passes through the screw hole to abut against the first connecting part 311.
[0046] like Figure 2 As shown, in one embodiment of this utility model, the locking member 33 is an adjustable handle screw, including a first handle 331 and a screw 332 disposed on the first handle 331. A protrusion is provided on the clamp 32 at a position opposite to the outer wall of the first connecting part 311. This protrusion has a threaded hole (not shown). The screw 332 is screwed into the threaded hole to abut against the outer wall of the rotary table 31, thus fixing the clamp 32 onto the rotary table 31. It is understood that the operator can rotate the screw 332 located in the threaded hole using the first handle 331 to make the end of the screw 332 away from the first handle 331 abut against or separate from the first connecting part 311. The structure of the first handle 331 and the screw 332 facilitates operation and allows for quick adjustment of the rotation angle of the clamp 32 on the rotary table 31, which is beneficial for improving the processing efficiency of the cutting tool.
[0047] In one embodiment, the tool holder 3 further includes a movable member 34 disposed on the side of the rotary table 31 away from the fixture 32. The frame 1 is provided with a first guide rail 11 and a first lead screw 12 spaced apart along the second direction. The movable member 34 is provided with a guide hole and a lead screw nut. The first guide rail 11 passes through the guide hole, and the first lead screw 12 passes through the lead screw nut. The first lead screw 12 is used to rotate to drive the movable member 34 to move along the second direction.
[0048] like Figures 2 to 4 As shown, in one embodiment of this utility model, the tool holder 3 further includes a movable component 34. Specifically, the frame 1 is provided with a first guide rail 11 and a first lead screw 12 spaced apart along the second direction. The first lead screw 12 and the second lead screw 43 are arranged in parallel. A guide hole is provided through the movable component 34 and a lead screw nut (not shown) is installed thereon. The first guide rail 11 is a smooth cylindrical structure and passes through the guide hole of the movable component 34. The first lead screw 12 passes through the lead screw nut on the movable component 34. A rotary table 31 is provided above the movable component 34 and is fixedly connected to the first connecting part 311. A handwheel 13 is provided at one end of the first lead screw 12 that extends out of the frame 1. The first lead screw 12 is rotated by the handwheel 13, so that the movable component 34 moves back and forth along the second direction, thereby adjusting the position of the clamp 32 relative to the grinding workpiece 22. Combined with the rotation function of the rotary table 31, the position adjustment of the tool 200 to be ground is more flexible, and different arc-shaped cutting edges can be processed.
[0049] In some other embodiments of this utility model, in order to improve the stability of the moving part 34 during the movement process, the number of first guide rails 11 can be increased. The first lead screw 12 and multiple first guide rails 11 are arranged parallel to each other along the second direction. The moving part 34 can move along the second direction on the first lead screw 12 and multiple first guide rails 11, and drive the tool to be sharpened 200 on the fixture 32 to move to realize the sharpening function.
[0050] In one embodiment, a second guide rail 14 is provided on the frame 1 along a first direction. The grinding device 2 also includes a mounting base 23 and an adjusting base 24 rotatably connected to the mounting base 23. The mounting base 23 is movably disposed on the second guide rail 14. The motor 21 is mounted on the adjusting base 24. The adjusting base 24 is used to rotate on the mounting base 23 to adjust the grinding angle of the grinding workpiece 22.
[0051] like Figure 1 and Figure 2As shown, in one embodiment of this utility model, a second guide rail 14 extends along the second direction on the frame 1. The sharpening device 2 also includes a mounting base 23 and an adjusting base 24. The mounting base 23 is movably mounted on the second guide rail 14, and the adjusting base 24 is mounted on the mounting base 23. The motor 21 is mounted on the adjusting base 24. When the tool to be sharpened 200 is fixed on the fixture 32, the length direction of the blade can be placed along the second direction. During processing, the sharpening device 2 can be moved back and forth in the second direction by the motor drive or by hand to sharpen the blade of the tool to be sharpened 200. The second guide rail 14 is located on the side of the fixture 32 away from the handwheel 13, which facilitates operation. Compared with the fixed-position grinding part 22, the entire sharpening device 2 is movable, which simplifies the moving structure of the tool holder 3 and reduces the control difficulty of the sharpening machine 100.
[0052] Furthermore, the adjusting seat 24 is rotatably connected to the mounting seat 23 via a rotating shaft. When the adjusting seat 24 rotates on the mounting seat 23, the inclination angle of the grinding surface of the grinding workpiece 22 can be adjusted to match the cutting edge angle of the tool to be ground 200. It can be understood that controlling the motor 21 to drive the grinding rotation through the adjusting seat 24 can ensure the stability of the connection between the grinding workpiece 22 and the motor 21, and the angle is easier to control.
[0053] In one embodiment, the adjusting seat 24 or the mounting seat 23 is further provided with a second handle 25, which is used to lock the adjusting seat 24 onto the mounting seat 23 or loosen the connection between the adjusting seat 24 and the mounting seat 23;
[0054] And / or, the adjustment seat 24 is also provided with an angle display 241, which is used to display the angular position of the grinding workpiece 22.
[0055] like Figure 2 As shown in one embodiment of this utility model, a second handle 25 is provided on the adjusting seat 24. Specifically, a sliding groove is provided on the mounting seat 23. The sliding groove extends in an arc shape with the pivot point at the connection between the adjusting seat 24 and the mounting seat 23 as the center. The second handle 25 is located on the side of the mounting seat 23 away from the adjusting seat 24, and one end of the second handle 25 passes through the sliding groove and connects to the adjusting seat 24. When it is necessary to adjust the angle of the grinding piece 22, the adjusting seat 24 and the mounting seat 23 are loosened by rotating the second handle 25. At this time, the adjusting seat 24 can be rotated to drive the pitch movement of the motor 21 and the grinding piece 22. After the angle adjustment is completed, the adjusting seat 24 is locked on the mounting seat 23 by rotating the second handle 25 in the opposite direction so that the grinding piece 22 is maintained at a fixed angle.
[0056] Furthermore, the adjusting seat 24 is also equipped with an angle display 241 for real-time display of the tilt angle of the adjusting seat 24. The operator can accurately obtain the grinding surface angle of the grinding workpiece 22 through the angle display 241, which can improve the product quality of the cutting tool. It should be noted that the angle of the adjusting seat 24 can be adjusted manually or by using a drive component. The specific method used is not limited here. This embodiment adopts the latter, which will be described in detail below.
[0057] In one embodiment, the sharpening machine 100 further includes an angle adjustment mechanism 4. The angle adjustment mechanism 4 includes a bracket 41, a pulley 42, a connecting rope 44, and a second lead screw 43 disposed on the bracket 41. The bracket 41 is disposed on the mounting base 23. One end of the connecting rope 44 is connected to the adjustment base 24, and the other end of the connecting rope 44 is connected to the second lead screw 43 around the pulley 42. The second lead screw 43 is used to drive the adjustment base 24 to rotate through the connecting rope 44.
[0058] like Figure 2 and Figure 6 As shown, in one embodiment of this utility model, the sharpening machine 100 further includes an angle adjustment mechanism 4 disposed on the sharpening device 2. Specifically, the angle adjustment mechanism 4 includes a bracket 41 and a pulley 42, a second lead screw 43, and a connecting rope 44 disposed on the bracket 41. The bracket 41 is fixed on the mounting base 23 and located on the side of the mounting base 23 away from the grinding workpiece 22. The pulley 42 is rotatably disposed on the bracket 41. The second lead screw 43 is disposed on the bracket 41 along the height direction and located above the pulley 42. One end of the connecting rope 44 is connected to the end of the second lead screw 43 near the pulley 42. The connecting rope 44 is wound around the pulley 42 and the other end is connected to the adjusting seat 24. Because of the weight of the motor 21 at the lower end of the adjusting seat 24, the connecting rope 44 is always in a taut state. By rotating the adjusting handle at the top of the second lead screw 43, the second lead screw 43 can be moved up and down, so that the connecting rope 44 drives the adjusting seat 24 to rotate relative to the mounting base 23, thereby adjusting the angle of the grinding workpiece 22.
[0059] It should be noted that by using a lead screw in conjunction with pulley 42 and connecting rope 44, the rotation angle of the adjusting seat 24 on the mounting seat 23 can be controlled very conveniently, further improving the machining accuracy of the cutting tool.
[0060] In one embodiment, the grinding machine 100 further includes a height adjustment mechanism 5, which includes a lifting seat 51, a third guide rail 52, and a third lead screw 53. The third guide rail 52 is disposed on the adjustment seat 24, the lifting seat 51 is movably disposed on the third guide rail 52, the motor 21 is disposed on the lifting seat 51, and the third lead screw 53 is disposed on the adjustment seat 24 and drivenly connected to the lifting seat 51 for adjusting the height of the grinding workpiece 22.
[0061] like Figure 7As shown, in one embodiment of this utility model, the sharpening machine 100 further includes a height adjustment mechanism 5 disposed on the sharpening device 2. Specifically, the height adjustment mechanism 5 includes a lifting seat 51, a third guide rail 52, and a third lead screw 53. The third guide rail 52 is disposed on the surface of the adjusting seat 24 along the height direction. The lifting seat 51 is slidably disposed on the third guide rail 52. The motor 21 is disposed on the side of the lifting seat 51 away from the third guide rail 52. The third lead screw 53 is disposed on the adjusting seat 24, and one end of it is connected to the lifting seat 51. By operating the adjustment handle above the third lead screw 53, the third lead screw 53 is rotated and moved on the adjusting seat 24, which can drive the lifting seat 51 to move on the third guide rail 52, thereby adjusting the height of the grinding workpiece 22. It can be understood that the lead screw structure can precisely control the moving distance of the lifting seat, thereby improving the machining accuracy of the tool.
[0062] In one embodiment, the height adjustment mechanism 5 further includes an elastic element 54, one end of which is connected to one end of the third lead screw 53, and the other end of which is connected to the lifting seat 51.
[0063] like Figure 1 and Figure 2 As shown, in another embodiment of this utility model, the height adjustment mechanism 5 further includes an elastic element 54, which is a tension spring. One end of the elastic element 54 is connected to the lower end of the third lead screw 53, and the end of the elastic element 54 away from the third lead screw 53 is connected to the lifting seat 51. Under the action of gravity, the lifting seat 51, the motor 21, and the grinding part 22 pull the elastic element 54 downward along the third guide rail 52. When the elastic element 54 is stretched to a certain extent and offsets the weight of the lifting seat 51, the motor 21, and the grinding part 22, the elastic element 54 can maintain the grinding part 22 at a certain height. At this time, by operating the adjustment handle above the third lead screw 53 to rotate, the third lead screw 53 can be raised or lowered, and the height of the lifting seat 51, the motor 21, and the grinding part 22 can be adjusted.
[0064] When a tool needs to be machined, the operator first fixes the tool 200 to be ground on the fixture 32, and then rotates the handle at the upper end of the third lead screw 53 to move the third lead screw 53 downward to lower the height of the grinding workpiece 22. During the process of controlling the lowering of the height of the grinding workpiece 22, when the grinding workpiece 22 contacts the cutting edge of the tool 200 to be ground, the operator further rotates the third lead screw 53 to move downward. The grinding workpiece 22 stops moving downward due to resistance and the elastic element 54 contracts. At this time, the lifting seat 51, the motor 21, and the grinding workpiece 22 will exert pressure on the tool 200 to be ground under the action of gravity.
[0065] Understandably, when sharpening the tool, the running distance of the mounting base 23 on the second guide rail 14 is set to be no greater than the length of the cutting edge. Under the action of gravity, the grinding surface of the grinding part 22 is kept in close contact with the cutting edge. Even if the grinding part 22 is worn during the sharpening process, it can be automatically compensated to maintain the contact between the grinding part 22 and the cutting edge, thus achieving a more efficient and stable sharpening function. It should be noted that by rotating the third lead screw 53, the pressure of the grinding part 22 on the tool 200 to be sharpened can be controlled within a preset range to improve the machining accuracy.
[0066] Furthermore, a water pipe (not shown) can be installed on the lifting seat 51, with the water outlet located near the grinding workpiece 22, to cool down the cutting tool and grinding workpiece 22 during grinding, thereby ensuring the quality of the finished cutting tool.
[0067] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A knife sharpening machine, characterized in that, include: frame; A sharpening device is movably mounted on the frame along a first direction. The sharpening device includes a motor and a grinding element mounted on the motor. The motor is rotatably connected to the frame so that the pitch angle of the grinding element is adjustable. The motor is also vertically mounted on the frame so that the height of the grinding element is adjustable. The motor is used to drive the grinding element to rotate in order to sharpen the tool to be sharpened. as well as The tool holder includes a rotary table and a clamp for holding a tool to be sharpened. The clamp is rotatably mounted on the rotary table to adjust the swing angle of the cutting edge of the tool to be sharpened. The rotary table is movably mounted on the frame along a second direction to drive the clamp to move along the second direction so that the grinding surface of the grinding workpiece contacts the cutting edge of the tool to be sharpened. The first direction and the second direction form an angle.
2. The sharpening machine as described in claim 1, characterized in that, The rotary table includes a first connecting part and a second connecting part. The first connecting part is movably disposed on the frame, and the second connecting part is rotatably connected to the first connecting part. The clamp is connected to the second connecting part.
3. The sharpening machine as described in claim 2, characterized in that, The tool holder also includes a locking member, which is movably disposed on the clamp and separable from the first connecting portion. The locking member is used to abut against the first connecting portion to restrict the clamp from rotating relative to the first connecting portion.
4. The sharpening machine as described in claim 3, characterized in that, The locking member includes a first handle and a screw connected to the first handle. The clamp has a screw hole at a position facing the outer wall of the first connecting part. The end of the screw away from the first handle passes through the screw hole to abut against the first connecting part.
5. The sharpening machine as described in any one of claims 1 to 4, characterized in that, The tool holder also includes a movable component disposed on the side of the rotary table away from the fixture. The frame is provided with a first guide rail and a first lead screw spaced apart along the second direction. The movable component is provided with a guide hole and a lead screw nut. The first guide rail passes through the guide hole, and the first lead screw passes through the lead screw nut. The first lead screw is used to rotate to drive the movable component to move along the second direction.
6. The sharpening machine as described in claim 1, characterized in that, The frame is provided with a second guide rail along the first direction. The grinding device also includes a mounting base and an adjusting base rotatably connected to the mounting base. The mounting base is movably disposed on the second guide rail. The motor is mounted on the adjusting base. The adjusting base is used to rotate on the mounting base to adjust the grinding angle of the grinding workpiece.
7. The sharpening machine as described in claim 6, characterized in that, The adjusting seat or the mounting seat is further provided with a second handle, which is used to lock the adjusting seat onto the mounting seat or loosen the connection between the adjusting seat and the mounting seat. And / or, the adjustment seat is further provided with an angle display, which is used to display the angular position of the grinding workpiece.
8. The sharpening machine as described in claim 6, characterized in that, The sharpening machine also includes an angle adjustment mechanism, which includes a bracket, a pulley, a connecting rope, and a second lead screw mounted on the bracket. The bracket is mounted on the mounting base. One end of the connecting rope is connected to the adjustment base, and the other end of the connecting rope is connected to the second lead screw around the pulley. The second lead screw is used to drive the adjustment base to rotate through the connecting rope.
9. The sharpening machine as described in claim 6, characterized in that, The grinding machine also includes a height adjustment mechanism, which includes a lifting seat, a third guide rail, and a third lead screw. The third guide rail is mounted on the adjustment seat, and the lifting seat is movably mounted on the third guide rail. The motor is mounted on the lifting seat, and the third lead screw is mounted on the adjustment seat and drivenly connected to the lifting seat. The third lead screw is used to drive the lifting seat to move on the third guide rail to adjust the height of the grinding workpiece.
10. The sharpening machine as described in claim 9, characterized in that, The height adjustment mechanism also includes an elastic element, one end of which is connected to one end of the third lead screw, and the other end of which is connected to the lifting seat.