Multi-functional sharpener

Abstract

The application discloses a multifunctional knife sharpener which is high in applicability, good in knife sharpening effect and better in performance, and relates to the technical field of knife sharpeners. The base is provided with a knife sharpening mechanism, the knife sharpening mechanism comprises a driving wheel and a knife sharpening part which is sleeved on the driving wheel, the driving wheel is driven to rotate by a power source so as to drive the knife sharpening part to rotate; a knife rest which is rotatably arranged, the knife rest is used for placing a knife, and the blade of the knife is arranged in an angle structure with the polishing surface of the knife sharpening part, the polishing surface of the knife sharpening part polishes the blade when contacting the blade, and the angle a between the one end surface of the blade and the polishing surface of the knife sharpening part is adjusted by rotating the knife rest; and a grinding part which is detachably connected to one side of the axial direction of the driving wheel and connected with the driving wheel, and the grinding part is coaxially connected with the driving wheel.

Description

Technical Field

[0001] This invention relates to the field of knife sharpener technology, and more specifically to a multifunctional knife sharpener. Background Technology

[0002] Existing knife sharpeners are generally divided into two types: electric knife sharpeners and non-electric knife sharpeners. Both are used to sharpen knives and other knives, making them sharp or to open them.

[0003] Please refer to the electric belt sander disclosed in publication number CN201483304U. The structure is as follows: the power source drives the sanding belt to rotate, and when used for sharpening, the cutting edge of the knife directly contacts the grinding surface of the sanding belt.

[0004] This type of sharpener typically only has a sharpening function, with limited functionality, and cannot meet the actual needs of users. Furthermore, the angle 'a' between the blade and the abrasive belt is judged by the user through experience. If the angle 'a' is too large, it may result in over-sharpening, and if the angle 'a' is too small, it may result in under-sharpening. The user's skill level in sharpening greatly affects the sharpening effect, making it unsuitable for users with little experience. Summary of the Invention

[0005] To address the shortcomings and defects of existing technologies, a multi-functional knife sharpener with high applicability, excellent sharpening effect, and superior performance is provided.

[0006] A multi-functional knife sharpener includes a base for support on a substrate surface, the base having:

[0007] A sharpening mechanism, comprising a drive wheel and a sharpening part sleeved on the drive wheel, wherein the drive wheel is driven to rotate by a power source to drive the sharpening part to rotate;

[0008] The tool holder is rotatably configured to hold a cutting tool. The cutting edge of the cutting tool is arranged at an angle to the grinding surface of the grinding head. When the grinding surface of the grinding head contacts the cutting edge of the cutting tool, it grinds the cutting edge. The tool holder is rotated to adjust the angle α between one end face of the cutting edge and the grinding surface of the grinding head.

[0009] A grinding component is detachably connected to one axial side of the drive wheel, and the grinding component is connected to the drive wheel, and the grinding component and the drive wheel are coaxially linked.

[0010] With the above structure, the multifunctional knife sharpener of the present invention has the following advantages compared with the prior art: When in use, the knife is placed on the knife holder, and according to the sharpening angle requirement of the knife, the knife holder is rotated until the angle α between one end face of the cutting edge of the knife and the sharpening part reaches a suitable angle, so that the grinding surface of the sharpening part is in full contact with one end face of the cutting edge. At this time, the drive wheel is driven to rotate by the power source, so as to drive the sharpening part to rotate. The sharpening part can sharpen the knife edge by contacting the cutting edge of the knife.

[0011] The above improvements ensure sufficient contact between the blade and the grinding surface, resulting in better grinding performance, effectiveness, and consistency.

[0012] The angle α between the blade and the grinding surface of the grinding head is adjustable by rotating the cutting tool, which improves the applicability of the device. Users can adjust the angle α to the required position before grinding. The contact area between the grinding head and the blade is more consistent, and the blade can be ground evenly and uniformly.

[0013] The tool holder stabilizes the tool position, allowing the blade to maintain stable contact with the grinding surface, resulting in better sharpening.

[0014] The detachable grinding component, after being connected to the drive wheel, rotates synchronously with the drive wheel. The relatively rough grinding surface of the grinding component allows users to sharpen the tools, further enhancing the functionality of the device.

[0015] As an improvement of the present invention, the grinding part is an abrasive belt, and the grinding mechanism further includes a driven wheel. The driven wheel and the driving wheel are arranged laterally. The abrasive belt is sleeved between the driving wheel and the driven wheel, and the grinding surface of the abrasive belt between the driving wheel and the driven wheel is formed into a flat structure.

[0016] The tool holder is provided with a placement end face, one side of the tool is supported by the placement end face, and the lower end of the placement end face is set to the grinding surface of the straight area of ​​the abrasive belt, so as to form a "V" shaped structure angle arrangement.

[0017] As an improvement of the present invention, the drive wheel has a hollow assembly space inside, and a power source frame is provided in the assembly space, and the power source is assembled in the power source frame.

[0018] The power source output end is arranged to extend toward the tail end of the drive wheel, and the tail end of the drive wheel is provided with a connecting shaft. The connecting shaft is provided with a socket for the power source output end to be inserted to achieve coaxial connection.

[0019] As an improvement of the present invention, the tail end of the drive wheel is provided with a coaxial transmission component, the tail end of the transmission component passes through the base to the outside, the front end of the grinding component is provided with a hexagonal shaft extending forward axially, and the transmission component has a connecting hole for the hexagonal shaft to pass through.

[0020] As an improvement of the present invention, the tail end of the tool holder is provided with a connecting part, and the front end of the connecting part is sleeved on the shaft of the base through an inner hole;

[0021] A fixed frame is provided at the tail end of the shaft. A movable pin is provided on the fixed frame, extending radially to the outside of the fixed frame. An elastic element is provided between the tail end of the movable pin and the fixed frame. The connecting part is provided with a matching groove at intervals along the circumference. As the tool holder rotates, the top or bottom of the matching groove continuously contacts the movable pin, driving the front end of the movable pin to move elastically back and forth. When the movable pin moves forward until the front end enters the matching groove, the rotation of the tool holder is locked.

[0022] As an improvement of the present invention, a retainer is provided on the fixed frame, and a mating groove extending vertically is provided between the retainer and the fixed frame. A pin is provided at the tail end of the movable pin, and the pin is placed in the mating groove. The pin and the mating groove are configured to slide vertically and rotate, so that the movable pin can deflect.

[0023] The connecting part has a receiving groove at its tail end, and the arranged matching grooves are arranged on the periphery of the receiving groove. A first guide part is arranged in the receiving groove at the position corresponding to the tail end of the arranged matching grooves. The first guide part has an inclined first guide surface. When the tool holder rotates forward, the first guide surface continuously contacts the inner side of the movable pin. The first guide surface drives the movable pin to deflect axially outward, so that when the tool holder rotates in the reverse direction, the head of the movable pin and the arranged matching grooves are always in a disengaged position in the movement trajectory of the matching grooves.

[0024] As an improvement of the present invention, the outer end opening of the receiving groove is detachably connected to an end cap, the end cap and the connecting part are configured to rotate synchronously, the end cap is provided with a second guide part, the second guide part extends into the receiving groove and is positioned at the front end of the arranged matching grooves, the second guide part is provided with an inclined second guide surface, the tool holder rotates in the reverse direction until the second guide surface is in continuous contact with the outer side of the movable pin, the second guide surface drives the movable pin to deflect axially inward to reset, so that when the tool holder rotates in the forward direction, the head of the movable pin is in a position where it can cooperate with the arranged matching grooves in the movement trajectory of the matching grooves.

[0025] As an improvement of the present invention, the end cap is provided with a first adsorption pad, the first adsorption pad is positioned relative to the first guide portion, and the first adsorption pad is used to adsorb and position the movable pin that has been guided and deflected by the first guide portion.

[0026] A second adsorption pad is provided in the receiving groove. The second adsorption pad is positioned relative to the second guide part. The second adsorption pad is used to adsorb and position the movable pin that has been guided and deflected by the second guide part.

[0027] As an improvement of the present invention, the base is provided with an adjustment mechanism, the adjustment mechanism includes a first bracket and a second bracket, the front end of the first bracket is hinged to the base and the rear end is hinged to the front end of the second bracket, the rear end of the second bracket is hinged to a slider, the slider is slidably disposed on the base, one axial end of the driven wheel is provided with a connecting member, and a pre-tightening member is abutted between the connecting member and the slider;

[0028] A handle is provided at the hinge joint between the first bracket and the second bracket, and the first bracket is rotated up and down by means of the handle.

[0029] As an improvement of the present invention, the number of sanding belts is three, and the three sanding belts are sequentially sleeved between the driving wheel and the driven wheel along the first direction A. The three sanding belts are sequentially arranged along the first direction A as a sanding belt for coarse grinding, a sanding belt for fine grinding, and a sanding belt for fine grinding.

[0030] The driving wheel and the driven wheel are respectively provided with three fitting areas for the sanding belt along the first direction A. The fitting areas are independently configured to cooperate with the sanding belt. The fitting area includes a straight area and a variable diameter area located at the end of the straight area with a gradually decreasing diameter. The outer peripheral surfaces of the straight areas of the three fitting areas on the same axis are coplanar. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0033] Figure 3 This is a schematic diagram of the connection structure of the tool holder part of the present invention in the exploded state of the components. Figure 1 .

[0034] Figure 4 This is a schematic diagram of the connection structure of the tool holder part of the present invention in the exploded state of the components. Figure 2 .

[0035] Figure 5 This is a schematic diagram of the position and structure of the tool holder connection part of the present invention.

[0036] Figure 6 This is a schematic diagram of the structure after the movable pin and the mating groove of the present invention are engaged.

[0037] Figure 7 This is a schematic diagram of the position and structure of the fitting groove of the present invention.

[0038] Figure 8 This is a schematic diagram of the positional structure of the movable pin after it has been guided by the first guide surface according to the present invention.

[0039] Figure 9 This is a schematic diagram of the positional structure of the fixing frame and end cap of the present invention.

[0040] Figure 10 This is a schematic diagram of the positional structure of the fixing frame and end cap of the present invention. The diagram shows the extreme positions of the movable pin deflecting outward and inward.

[0041] Figure 11 This is a schematic diagram showing the positions of the movable pin and the elastic element of the present invention.

[0042] Figure 12 This is a schematic diagram of the movable pin and the cage of the present invention.

[0043] Figure 13 This is a schematic diagram of the driving wheel and driven wheel of the present invention.

[0044] Figure 14 This is a schematic diagram of the adjustment mechanism of the present invention.

[0045] Figure 15 This is the invention Figure 14 Enlarged schematic diagram of the structure at point B.

[0046] Figure 16 This is a schematic diagram illustrating an embodiment of the present invention.

[0047] Figure 17 This is a schematic diagram illustrating the definition of the included angle α according to the present invention.

[0048] The figure shows: 1. Base; 1.1. Shaft; 2. Grinding section; 3. Tool holder; 3.1. Connecting part; 3.11. Fitting groove; 3.12. Receiving groove; 3.2. Placement end face; 4. Tool; 4.1. Cutting edge; 5. Fixing bracket; 5.1. Movable pin; 5.2. Retainer; 5.21. Mating groove; 5.3. Slot; 6. Elastic element; 7. First guide part; 7.1. First guide surface; 8. End cap; 8.1. Second guide part; 8.11. Second guide surface; 9. First suction pad; 10. Second suction pad 11. Drive wheel; 11.1 Assembly space; 11.2 Power source frame; 11.21 Power source; 11.3 Connecting shaft; 11.31 Connecting part; 11.32 Transmission component; 12. Driven wheel; 13. Grinding component; 13.1 Hexagonal shaft; 14. Adjustment mechanism; 14.1 First bracket; 14.2 Second bracket; 14.3 Slider; 14.4 Connecting part; 14.5 Pre-tightening part; 15. Handle; 16. Sleeving area; 16.1 Straight area; 16.2 Variable diameter area. Detailed Implementation

[0049] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0050] Please see Figure 1-17 As shown, a multi-functional knife sharpener includes a base 1 for support on a substrate surface, wherein the base 1 is provided with:

[0051] The sharpening mechanism includes a drive wheel 11 and a sharpening part 2 sleeved on the drive wheel 11. The drive wheel 11 is driven to rotate by a power source 11.21 to drive the sharpening part 2 to rotate.

[0052] The tool holder 3 is rotatably configured to hold the tool 4. The cutting edge 4.1 of the tool 4 is arranged at an angle to the grinding surface of the grinding part 2. When the grinding surface of the grinding part 2 contacts the cutting edge 4.1 of the tool 4, it grinds the cutting edge. The tool holder 3 is rotated to adjust the angle α between the cutting edge 4.1 and the grinding surface of the grinding part 2.

[0053] The grinding component 13 is detachably connected to one axial side of the drive wheel 11, and the grinding component 13 is connected to the drive wheel 11, and the grinding component 13 and the drive wheel 11 are coaxially linked.

[0054] With the above structure, the multifunctional knife sharpener of the present invention has the following advantages compared with the prior art: When in use, the knife 4 is placed on the knife holder 3. According to the sharpening angle requirement of the knife 4, the knife holder 3 is rotated until one end face of the cutting edge 4.1 of the knife 4 is in full contact with the grinding surface of the sharpening part 2. At this time, the drive wheel 11 is driven to rotate by the power source 11.21 to drive the sharpening part 2 to rotate. The grinding surface of the sharpening part 2 can sharpen the knife edge by contacting the cutting edge 4.1 of the knife 4.

[0055] The above improvements ensure sufficient contact between the blade and the grinding surface, resulting in better grinding performance, effectiveness, and consistency.

[0056] The angle α between the cutting edge 4.1 and the grinding surface of the grinding part 2 can be adjusted by rotating the cutting tool 4, thereby improving the applicability of the device;

[0057] The tool holder 3 stabilizes the position of the tool 4, allowing the blade to make stable contact with the grinding surface, resulting in better sharpening effect;

[0058] The detachable grinding component 13 rotates synchronously with the drive wheel 11 after being connected to it. The relatively rough grinding surface of the grinding component 13 allows the user to sharpen the tool 4, further enhancing the functionality of the device.

[0059] As an improvement of the present invention, the grinding part 2 is an abrasive belt, and the grinding mechanism further includes a driven wheel 12. The driven wheel 12 and the driving wheel 11 are arranged laterally. The abrasive belt is sleeved between the driving wheel 11 and the driven wheel 12. The grinding surface of the abrasive belt between the driving wheel 11 and the driven wheel 12 is formed into a flat structure.

[0060] The tool holder 3 is provided with a placement end face 3.2, and one side of the tool 4 is supported by the placement end face 3.2. The lower end of the placement end face 3.2 is positioned to point towards the grinding surface of the straight area 16.1 of the abrasive belt, forming a "V" shaped structure with an angled arrangement. After the above improvement, the abrasive belt is used as the grinding part 2. When the power source 11.21 drives the drive wheel 11 to rotate, it drives the abrasive belt to rotate. When the abrasive belt contacts the cutting edge 4.1, it can efficiently grind the cutting edge 4.1.

[0061] When sharpening the knife, the user presses one side of the knife 4 onto the placement end face 3.2, with the cutting edge 4.1 extending beyond the placement end face 3.2 and contacting the grinding surface of the abrasive belt. The user can move the knife 4 back and forth, or hold the knife 4 firmly so that the abrasive belt can grind the cutting edge 4.1.

[0062] The placement end face 3.2 is arranged in a "V" shaped angle. When the tool holder 3 rotates, the angle between the placement end face 3.2 and the abrasive belt grinding surface is adjusted, thereby adjusting the angle α between the cutting edge 4.1 of the tool 4 on the placement end face 3.2 and the grinding surface.

[0063] The above improvements result in a product that is simple in structure, reliable in operation, and easy for users to use.

[0064] As an improvement of the present invention, the drive wheel 11 has a hollow assembly space 11.1 inside, and a power source frame 11.2 is provided in the assembly space 11.1, and the power source 11.21 is assembled in the power source frame 11.2;

[0065] The power source 11.21 is configured such that its output end extends toward the tail end of the drive wheel 11. The tail end of the drive wheel 11 is provided with a connecting shaft 11.3, which has a socket for the output end of the power source 11.21 to be inserted, thus achieving coaxial fixation. With this improvement, the power source 11.21 and the power source frame 11.2 are integrated and assembled within the assembly space 11.1 inside the drive wheel 11. The connection structure between the output end of the power source 11.21 and the drive wheel 11 is also placed within the assembly space 11.1, reducing space occupation and improving the overall integrity and compactness of the device structure, which is beneficial for miniaturization.

[0066] The power source 11.21 can be a motor or a mechanism that outputs torque.

[0067] As an improvement of the present invention, the tail end of the drive wheel 11 is provided with a coaxial transmission component 11.32. The tail end of the transmission component 11.32 passes through the base 1 to the outside. The front end of the grinding component 13 is provided with a hexagonal shaft 13.1 extending axially forward. The transmission component 11.32 has a connecting hole for the hexagonal shaft 13.1 to pass through. The connection hole and the hexagonal shaft 13.1 are adapted to each other. When the hexagonal shaft 13.1 is inserted into the connection hole, the grinding component 13 and the drive wheel 11 are coaxially connected. Alternatively, the hexagonal shaft 13.1 can be removed from the connection hole to disconnect the connection between the grinding component 13 and the drive wheel 11. The grinding component 13 is designed to be detachable. When using the sharpening part 2, the user needs to remove the grinding component 13 and then reinstall it when using the grinding part 13. This design features simple disassembly and assembly and convenient use.

[0068] The grinding component 13 can be a grinding wheel, wool wheel, or other sharpening element.

[0069] As an improvement of the present invention, the tail end of the tool holder 3 is provided with a connecting part 3.1, and the front end of the connecting part 3.1 is sleeved on the shaft 1.1 of the base 1 through the inner hole;

[0070] A fixed frame 5 is provided at the tail end of the shaft 1.1. A movable pin 5.1 is provided on the fixed frame 5, extending radially to the outside of the fixed frame 5. An elastic element 6 is provided between the tail end of the movable pin 5.1 and the fixed frame 5. The connecting part 3.1 is provided with a circumferentially spaced engagement groove 3.11. As the tool holder 3 rotates, the top or bottom of the engagement groove 3.11 continuously contacts the movable pin 5.1, driving the front end of the movable pin 5.1 to move elastically back and forth. When the movable pin 5.1 moves forward until its front end enters the engagement groove 3.11, the rotation of the tool holder 3 is locked.

[0071] The tool holder 3 is provided with a connecting part 3.1 at its tail end. The inner end of the connecting part 3.1 is provided with a through hole and is sleeved on the shaft 1.1 so that the tool holder 3 can rotate. This configuration has the characteristics of stable and reliable operation.

[0072] The outer end of the connecting part 3.1 is provided with a receiving groove 3.12, and the fixing bracket 5 is located in the receiving groove 3.12 and fixed to the tail end of the shaft 1.1;

[0073] The meshing groove 3.11 is a toothed groove structure design, and is arranged at intervals along the circumference of the tool holder 3 on the peripheral wall of the receiving groove 3.12;

[0074] The elastic element 6 is a helical spring, which is abutted against the tail end of the movable pin 5.1, so that the movable pin 5.1 can float back and forth;

[0075] When the tool holder 3 is rotated, the front part of the movable pin 5.1 gradually contacts the top of the groove from the bottom of the groove. The movable pin 5.1 moves backward, the elastic element 6 is compressed, and the front part of the movable pin 5.1 gradually disengages from the mating groove 3.11. The tool holder 3 can lose the limiting position of the movable pin 5.1.

[0076] When the tool holder 3 is rotated, the front part of the movable pin 5.1 gradually contacts the bottom of the groove from the top of the groove. The movable pin 5.1 moves forward, the elastic element 6 extends, and the front part of the movable pin 5.1 gradually enters the mating groove 3.11. The tool holder 3 can be repositioned by the movable pin 5.1.

[0077] The above improvements result in a compact structure and stable and reliable operation.

[0078] As an improvement of the present invention, a retainer 5.2 is provided on the fixed frame 5, and a vertically extending mating groove 5.21 is provided between the retainer 5.2 and the fixed frame 5. A pin is provided at the tail end of the movable pin 5.1. The pin is inserted into the mating groove 5.21. The pin and the mating groove 5.21 are configured to slide vertically and rotate, so that the movable pin 5.1 can deflect forward or deflect to the tail end.

[0079] The connecting part 3.1 has a receiving groove 3.12 at its tail end, and a series of mating grooves 3.11 are arranged on the peripheral wall of the receiving groove 3.12. A first guide part 7 is provided in the receiving groove 3.12 at the tail end of the mating grooves 3.11. The first guide part 7 has an inclined first guide surface 7.1. When the tool holder 3 rotates forward, the first guide surface 7.1 is in continuous contact with the inner side of the movable pin 5.1. The first guide surface 7.1 drives the movable pin 5.1 to deflect axially outward, so that when the tool holder 3 rotates in the reverse direction, the head of the movable pin 5.1 and the mating grooves 3.11 are always in a disengaged position in the movement trajectory of the mating grooves 3.11. The first guide surface 7.1 is positioned so that its front end is close to the rear end of the mating groove 3.11 and its rear end is far away from the mating groove 3.11. It is also designed to gradually tilt outward from its front end to its rear end. When the tool holder 3 is rotated, the front end of the first guide surface 7.1 gradually comes into contact with the movable pin 5.1, which drives the movable pin 5.1 to gradually deflect outward along the axial direction of the tool holder 3. At this time, the tool holder 3 rotates, and the mating groove 3.11 cannot cooperate with the movable pin 5.1 in its movement trajectory. The tool holder 3 is in a state of no positioning.

[0080] As an improvement of the present invention, the outer end opening of the receiving groove 3.12 is detachably connected to an end cap 8. The end cap 8 is configured to rotate synchronously with the connecting part 3.1. The end cap 8 is provided with a second guide part 8.1, which extends into the receiving groove 3.12 and is positioned at the front end of the arranged mating grooves 3.11. The second guide part 8.1 is provided with an inclined second guide surface 8.11. When the tool holder 3 rotates in the reverse direction, the second guide surface 8.11 continuously contacts the outer surface of the movable pin 5.1. The second guide surface 8.11 drives the movable pin 5.1 to deflect axially inward to reset. So that when the tool holder 3 rotates in the forward direction, the head of the movable pin 5.1 is in a position where it can engage with the arranged mating grooves 3.11 in the movement trajectory of the mating grooves 3.11.

[0081] The tail end of the second guide surface 8.11 is close to the front end of the mating groove 3.11, and the front end of the second guide surface 8.11 is far away from the mating groove 3.11. It is designed to gradually tilt outward from the tail end to the front end. When the tool holder 3 is rotated, the tail end to the front end of the second guide surface 8.11 gradually comes into contact with the movable pin 5.1, which drives the movable pin 5.1 to gradually deflect inward along the axial direction of the tool holder 3 until the movable pin 5.1 returns to its initial upright state. At this time, the tool holder 3 rotates in the forward direction, and the moving trajectory of the mating groove 3.11 can cooperate with the movable pin 5.1, and the tool holder 3 returns to a positionable state.

[0082] After the above improvements, the tool holder 3 can rotate back and forth to readjust the angle α between the cutting edge 4.1 and the sharpening part 2, which is convenient for users and has the characteristics of stable and reliable operation.

[0083] As an improvement of the present invention, the end cap 8 is provided with a first adsorption pad 9, which is positioned relative to the first guide portion 7. The first adsorption pad 9 is used to adsorb and position the movable pin 5.1 that has been guided and deflected by the first guide portion 7.

[0084] A second adsorption pad 10 is provided within the receiving groove 3.12. The second adsorption pad 10 is positioned relative to the second guide portion 8.1 and is used to adsorb and position the movable pin 5.1, which has been guided and deflected by the second guide portion 8.1. After the above improvement, when the movable pin 5.1, after being guided by the guide portion, approaches the adsorption pad, it is adsorbed and positioned by the adsorption pad, ensuring that the movable pin 5.1 is stably in the guided position, preventing the device from jamming, and further improving the stability and reliability of the device operation.

[0085] As an improvement of the present invention, an adjustment mechanism 14 is provided on the base 1. The adjustment mechanism 14 includes a first bracket 14.1 and a second bracket 14.2. The front end of the first bracket 14.1 is hinged to the base 1 and the rear end is hinged to the front end of the second bracket 14.2. A slider 14.3 is hinged to the rear end of the second bracket 14.2. The slider 14.3 is slidably disposed on the base 1. A connecting member 14.4 is provided at one axial end of the driven wheel 12. A pre-tightening member 14.5 is abutted between the connecting member 14.4 and the slider 14.3.

[0086] A handle 15 is provided at the hinge joint between the first bracket 14.1 and the second bracket 14.2. The first bracket 14.1 is rotated up and down via the handle 15. With the above improvement, the handle 15 at the hinge joint allows the user to rotate the first bracket 14.1 up and down. Rotating the first bracket 14.1 upwards causes the second bracket 14.2 to move backwards, which in turn causes the slider 14.3 to move backwards. This reduces the distance between the driving wheel 11 and the driven wheel 12, thus loosening the sanding belt.

[0087] The first support 14.1 moves downward, causing the second support 14.2 to move forward, which in turn causes the slider 14.3 to move forward. The distance between the driving wheel 11 and the driven wheel 12 increases, which can tighten the sanding belt.

[0088] As an improvement of the present invention, the number of sanding belts is three, and the three sanding belts are sequentially sleeved between the driving wheel 11 and the driven wheel 12 along the first direction A. The three sanding belts are arranged sequentially along the first direction A as a sanding belt with coarse grinding function, a sanding belt with fine grinding function, and a sanding belt with fine grinding function.

[0089] The driving wheel 11 and the driven wheel 12 are respectively provided with three fitting areas 16 for the sanding belt to be fitted along the first direction A. The fitting areas 16 are independently fitted with the sanding belt. The fitting area 16 includes a straight area 16.1 and a variable diameter area with a gradually decreasing diameter located at the end of the straight area 16.1. The outer peripheral surfaces of the straight areas 16.1 of the three fitting areas 16 on the same axis are coplanar.

[0090] There are 3 abrasive belts, each independently configured for coarse grinding, fine grinding, and fine grinding functions, and the 3 abrasive belts are arranged from left to right in the order of coarse grinding, fine grinding, and fine grinding.

[0091] Of course, there can also be only one sanding belt, with the functions of coarse grinding, fine grinding, and fine grinding arranged from left to right on the sanding belt;

[0092] When sharpening a knife, the user first contacts the front end of one end face of the cutting edge 4.1 of the knife 4 with the coarse grinding belt, and then moves the knife 4 forward (in the first direction A). During the movement, the cutting edge 4.1 undergoes coarse grinding, fine grinding, and precision grinding sequentially from the front end to the tail end. A single movement of the knife 4 can complete the entire grinding process of one end face of the cutting edge 4.1, making the sharpening efficiency high.

[0093] Furthermore, the front end of the other end face of the cutting edge 4.1 of the tool 4 is first brought into contact with the coarse grinding belt. Then, the tool 4 is moved forward, and during the movement, the cutting edge 4.1 undergoes coarse grinding, fine grinding, and precision grinding sequentially from the front end to the tail end. After the above operations are completed, the grinding of both ends of the cutting edge 4.1 of the tool 4 is finished.

[0094] The outer periphery of the straight area 16.1 of the three sleeved areas 16 is set to be coplanar. After the sanding belt is sleeved in the sleeved area 16, the straight area 16.1 can support the grinding surface of the three sanding belts, so that the grinding surface of the three sanding belts is coplanar. When the tool 4 moves in a single direction, the contact between the cutting edge and the grinding surface is stable and consistent, which improves the grinding effect on the cutting edge.

[0095] In addition, the variable diameter area allows the grinding surface at the tail end of the abrasive belt to gradually tilt and decrease, so that its height gradually falls below the grinding surface. When the tool 4 moves in a single direction, it can reduce the continuous contact between the grinding surface and the cutting edge 4.1, avoiding over-grinding. At the same time, after the grinding surface and the cutting edge 4.1 are separated, the tail or front of the cutting edge will not get stuck with the front of the abrasive belt, and can smoothly transition to the grinding surface of the next abrasive belt.

[0096] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A multi-functional knife sharpener, comprising a base (1) for support on a substrate surface, characterized in that, The base (1) is provided with: The sharpening mechanism includes a drive wheel (11) and a sharpening part (2) sleeved on the drive wheel (11). The drive wheel (11) is driven to rotate by a power source (11.21) to drive the sharpening part (2) to rotate. The tool holder (3) is rotatably set and is used to place the tool (4). The cutting edge (4.1) of the tool (4) is arranged at an angle with the grinding surface of the grinding part (2). When the grinding surface of the grinding part (2) contacts the cutting edge (4.1) of the tool (4), it grinds the cutting edge. The tool holder (3) is rotated to adjust the angle α between one end face of the cutting edge (4.1) and the grinding surface of the grinding part (2). The grinding component (13) is detachably connected to one side of the drive wheel (11), and the grinding component (13) is connected to the drive wheel (11), and the grinding component (13) and the drive wheel (11) are linked coaxially. The drive wheel (11) has a hollow assembly space (11.1) inside, and a power source frame (11.2) is provided in the assembly space (11.1). The power source (11.21) is assembled in the power source frame (11.2). The output end of the power source (11.21) extends toward the drive wheel (11), and the tail end of the drive wheel (11) is provided with a connecting shaft (11.3). The connecting shaft (11.3) is provided with a socket for the output end of the power source (11.21) to be inserted to achieve coaxial connection. The tail end of the drive wheel (11) is provided with a coaxial transmission component (11.32). The tail end of the transmission component (11.32) passes through the base (1) to the outside. The front end of the grinding component (13) is provided with a hexagonal shaft (13.1) extending forward axially. The transmission component (11.32) has a connecting hole for the hexagonal shaft (13.1) to pass through.

2. The multifunctional knife sharpener according to claim 1, characterized in that: The grinding section (2) is an abrasive belt. The grinding mechanism also includes a driven wheel (12). The driven wheel (12) and the driving wheel (11) are arranged laterally. The abrasive belt is sleeved between the driving wheel (11) and the driven wheel (12). The grinding surface of the abrasive belt between the driving wheel (11) and the driven wheel (12) is a flat structure. The tool holder (3) is provided with a placement end face (3.2), and one side of the tool (4) is supported by the placement end face (3.2). The lower end of the placement end face (3.2) is set to the grinding surface of the straight area (16.1) of the sanding belt, so as to form a "V" shaped structure angle arrangement.

3. The multifunctional knife sharpener according to claim 1, characterized in that: The tool holder (3) is provided with a connecting part (3.1) at its tail end. The front end of the connecting part (3.1) is sleeved on the shaft (1.1) of the base (1) through an inner hole. The shaft (1.1) is provided with a fixed frame (5) at its tail end. The fixed frame (5) is provided with a movable pin (5.1) that extends radially to the outside of the fixed frame (5). An elastic element (6) is provided between the tail end of the movable pin (5.1) and the fixed frame (5). The connecting part (3.1) is provided with a matching groove (3.11) spaced circumferentially. As the tool holder (3) rotates, the top or bottom of the matching groove (3.11) continuously contacts the movable pin (5.1), causing the front end of the movable pin (5.1) to move elastically back and forth. When the movable pin (5.1) moves forward until its front end enters the matching groove (3.11), the tool holder (3) is locked from rotating.

4. A multi-functional knife sharpener according to claim 3, characterized in that: The fixed frame (5) is provided with a retainer (5.2), and a vertically extending mating groove (5.21) is provided between the retainer (5.2) and the fixed frame (5). The tail end of the movable pin (5.1) is provided with a pin shaft, which is inserted into the mating groove (5.21). The pin shaft and the mating groove (5.21) are vertically sliding and rotating, so that the movable pin (5.1) can be deflected. The connecting part (3.1) is provided with a receiving groove (3.12) at its tail end. The arranged mating grooves (3.11) are arranged on the periphery of the receiving groove (3.12). A first guide part (7) is provided in the receiving groove (3.12) at the position corresponding to the tail end of the arranged mating grooves (3.11). The first guide part (7) has an inclined first guide surface (7.1). When the tool holder (3) rotates forward, the first guide surface (7.1) continuously contacts the inner side of the movable pin (5.1). The first guide surface (7.1) drives the movable pin (5.1) to deflect outward axially. When the tool holder (3) rotates in the reverse direction, the head of the movable pin (5.1) and the arranged mating grooves (3.11) are always in a disengaged position in the movement trajectory of the mating grooves (3.11).

5. A multifunctional knife sharpener according to claim 4, characterized in that: The outer end opening of the receiving groove (3.12) is detachably connected to an end cap (8). The end cap (8) and the connecting part (3.1) are configured to rotate synchronously. The end cap (8) is provided with a second guide part (8.1). The second guide part (8.1) extends into the receiving groove (3.12) and is located at the front end of the arranged mating grooves (3.11). The second guide part (8.1) is provided with an inclined second guide surface (8.11). The tool holder (3) rotates in the opposite direction until the second guide surface (8.11) is in continuous contact with the outer surface of the movable pin (5.1). The second guide surface (8.11) drives the movable pin (5.1) to deflect axially inward to reset. When the tool holder (3) rotates in the forward direction, the head of the movable pin (5.1) and the arranged mating grooves (3.11) are in a position where they can cooperate in the movement trajectory of the mating groove (3.11).

6. A multifunctional knife sharpener according to claim 5, characterized in that: The end cap (8) is provided with a first adsorption pad (9), which is positioned relative to the first guide part (7). The first adsorption pad (9) is used to adsorb and position the movable pin (5.1) that has been guided and deflected by the first guide part (7). The receiving groove (3.12) is provided with a second adsorption pad (10), which is positioned relative to the second guide part (8.1). The second adsorption pad (10) is used to adsorb and position the movable pin (5.1) that has been guided and deflected by the second guide part (8.1).

7. A multifunctional knife sharpener according to claim 2, characterized in that: An adjustment mechanism (14) is provided on the base (1). The adjustment mechanism (14) includes a first bracket (14.1) and a second bracket (14.2). The front end of the first bracket (14.1) is hinged to the base (1) and the rear end is hinged to the front end of the second bracket (14.2). A slider (14.3) is hinged to the rear end of the second bracket (14.2). The slider (14.3) is slidably disposed on the base (1). A connecting piece (14.4) is provided at one axial end of the driven wheel (12). A pre-tightening piece (14.5) is abutted between the connecting piece (14.4) and the slider (14.3). A handle (15) is provided at the hinge of the first bracket (14.1) and the second bracket (14.2), and the first bracket (14.1) is driven to rotate up and down by the handle (15).

8. A multifunctional knife sharpener according to claim 2, characterized in that: The number of abrasive belts is three. The three abrasive belts are sequentially sleeved between the driving wheel (11) and the driven wheel (12) along the first direction A. The three abrasive belts are arranged sequentially along the first direction A as a coarse grinding abrasive belt, a fine grinding abrasive belt, and a fine grinding abrasive belt. The driving wheel (11) and the driven wheel (12) are respectively provided with three fitting areas (16) for the sanding belt to be fitted along the first direction A. The fitting area (16) is independently fitted with the sanding belt. The fitting area (16) includes a straight area (16.1) and a variable diameter area with a gradually decreasing diameter located at the end of the straight area (16.1). The outer peripheral surfaces of the straight areas (16.1) of the three fitting areas (16) on the same axis are coplanar.

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