Knife grinding device
By designing a sharpening device including an adjustment mechanism, a pull rod, a universal connection and a clamping mechanism, the problem of difficulty for ordinary people to polish an ideal clam blade is solved, and an efficient and simple clam blade edge polishing effect is achieved.
Patent Information
- Application Number
- CN202421242578.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-05-31
AI Technical Summary
In daily life, it is difficult for ordinary people to effectively polish the ideal clam blade edge through hand-wrenching stones, especially lacking professional sharpening skills and skills.
A sharpening device is designed, including an adjustment mechanism, a tie rod, a universal connection member and a clamping mechanism. Through the adjustment mechanism, the height and angle of the tie rod are adjusted, so that the tool contacts the whetstone at an initial angle, and the back and forth movement between the tool and the whetstone is realized through the movement of the tie rod, thereby realizing convex grinding or flat grinding.
Users who are experienced or lack experience in sharpening can efficiently polish excellent clam blade edges through this device, simplifying the grinding process and improving efficiency.
Smart Images
Figure CN222779401U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of knife sharpening equipment, in particular to a knife sharpening device. Background Art
[0002] Knives such as kitchen knives, fruit knives, scissors, etc., as daily necessities, will lose their sharpness after long-term use. After the sharpness of the knives decreases, the knives need to be re-sharpened to restore their sharpness. Common sharpening methods include concave grinding, flat grinding, convex grinding, etc. Sharpening with concave grinding will form a very thin blade. The thinner the blade, the stronger the cutting performance. However, since the thin blade is very easy to break, it is not suitable for sharpening knives used for heavy chopping. The longitudinal section of the flat-ground blade is V-shaped, which is very thin, sharp and strong, but it consumes more materials. The side profile curve of the convex-ground blade bulges outward, resembling a clam. During the cutting and chopping process, the cross-sectional area of the clam blade tip is larger than that of the flat-ground blade, the blade has strong supporting force, is not easy to curl when against hard objects, and has higher sharpness retention than the flat-ground blade. Generally, high-end knives use clam blades when they leave the factory, but when the knife is blunt, it is difficult for users to restore the sharpness of the clam blade by a whetstone alone.
[0003] At present, in order to save money and facilitate the daily life of ordinary people, people generally use whetstones to manually sharpen the blades. However, most people do not have professional knife sharpening skills and do not master the techniques of sharpening. They cannot strictly control the direction and angle of the blade during the sharpening process, and it is difficult to sharpen an ideal blade. Utility Model Content
[0004] Based on this, the purpose of the utility model is to provide a knife sharpening device with a simple structure, convenient storage, ingenious design, and easy operation. Even if the user does not have professional knife sharpening experience, he can easily grind an excellent blade edge as needed.
[0005] In order to achieve the above object, the detailed technical solution of the utility model is as follows:
[0006] A knife sharpening device comprises an adjustment mechanism, a pull rod, a universal connector and a clamping mechanism; the universal connector is connected to the adjustment mechanism, and the adjustment mechanism can be adjusted to fix the universal connector at different heights, and the universal connector is provided with a first through hole; the pull rod passes through the first through hole and can move back and forth and can rotate with the universal connector; a clamping mechanism for clamping a tool is provided at one end of the pull rod.
[0007] Compared with the prior art, the sharpening device of the utility model connects the universal connector to the adjustment mechanism, so that the pull rod passes through the universal connector, thereby realizing the adjustment mechanism to adjust the height position of the pull rod, and at the same time adjusting the position of the pull rod and the universal connector, so that the tool fixed in the clamping mechanism contacts the whetstone fixed under the tool at a required initial angle through the forward and backward movement and up and down rotation of the pull rod; due to the ingenious design of the universal connector, the pull rod can pass through the first through hole and move in the sharpening direction and rotate relatively, and when the pull rod is pulled or pushed to move in the first through hole of the universal connector and the tool makes a reciprocating motion relative to the whetstone, the pull rod will rotate up and down, and the angle between the tool and the whetstone will change accordingly, thereby realizing convex grinding of the blade on the side of the tool contacting the whetstone. The user only needs to place or fix the knife on the clamping mechanism, and then pull or push the pull rod to make the knife move back and forth on the grindstone to grind the knife on the grindstone. This allows inexperienced or inexperienced users to efficiently grind out excellent clam-edge cutting edges without having to master too many convex grinding techniques. The knife sharpening device of the utility model has a simple and compact structure and is easy to operate.
[0008] Furthermore, the pull rod is provided with two limit mechanisms, which are respectively arranged on both sides of the universal joint on the pull rod. The limit mechanisms limit the distance that the pull rod moves relative to the universal joint, thereby limiting the change of the angle between the tool and the grindstone. The operator can design the distance between the two limit mechanisms according to the grinding requirements to control the range of the grinding angle.
[0009] Furthermore, the limiting mechanism comprises a sleeve with an inner diameter adapted to the pull rod and a limiting locking member provided on the sleeve, and the limiting locking member fixes the sleeve at any position on both sides of the universal connector on the pull rod.
[0010] Furthermore, the universal connector is a fisheye bearing structure, including an outer ring and an inner ring, and the first through hole is provided in the center of the inner ring.
[0011] Furthermore, the adjustment mechanism includes a vertically arranged slide bar, a first slider is arranged on the slide bar, the first slider can slide along the slide bar, the first slider is fixedly connected to the universal connector, and a first locking member is also arranged on the first slider, the first locking member fixes the first slider at any position of the slide bar. By adjusting the height position of the first slider to the slide bar and locking the first locking member, the height position of the pull rod is fixed.
[0012] Furthermore, the clamping mechanism is rotatably connected to the pull rod, and a second locking member is provided on the clamping mechanism to fix the angle between the clamping mechanism and the pull rod. Before using the knife sharpening device described in the utility model, the angle between the clamping mechanism and the pull rod can be adjusted to a desired angle and the second locking member can be locked to fix it. On the one hand, the angle can be adjusted, and on the other hand, the direction of the clamping end of the clamping mechanism can be changed according to the needs of the grinder, that is, the direction of the blade of the tool is changed. When the blade faces one side of the pull rod, the user can be on the opposite side of the pull rod and can push the tool in the direction toward himself, which is convenient for operation and improves safety.
[0013] Furthermore, the knife sharpening device further comprises a frame, the frame is provided with a horizontal straight rail; the adjusting mechanism is arranged on the rail, and the adjusting mechanism can slide along the rail; the universal joint also comprises a fixing part, the fixing part is fixedly connected with the inner ring, and is sleeved on the outer surface of the pull rod; the fixing part is provided with a third locking member, and the third locking member fixes the pull rod in the universal joint. When the operator wants to adopt the flat grinding method, the adjusting mechanism is adjusted to fix the height of the pull rod, and the clamped tool is contacted with the grindstone arranged under the clamping mechanism during the sharpening and forms a fixed angle, the third locking member is locked to fix the pull rod in the universal joint, so that the pull rod and the universal joint are relatively fixed and cannot move axially, and the pull rod is pulled / pushed or the adjusting mechanism is pushed to slide along the rail, so that the tool moves back and forth on the grindstone surface, and the angle between the clamped tool and the grindstone remains fixed during the process, thereby realizing the flat grinding of the tool. The user only needs to place or fix the tool on the clamping mechanism, and then pull / push the pull rod or push the adjustment mechanism to slide along the guide rail to make the tool move back and forth on the grindstone to grind the tool on the grindstone. This allows inexperienced or inexperienced users to efficiently grind out excellent cutting edges without having to master too many flat grinding techniques, and the operation is easy.
[0014] Furthermore, the adjustment mechanism also includes a second slider and a fourth locking member; the second slider is arranged on the guide rail and can slide along the guide rail; the sliding rod is arranged on the second slider and slides synchronously with the second slider; a fourth locking member is provided at the position where the second slider is connected to the guide rail, and the fourth locking member can fix the second slider at any position of the guide rail.
[0015] A knife sharpening method adopts a convex grinding method, which is characterized by comprising the following steps:
[0016] S1: Fixing the tool on the clamping mechanism, fixing a whetstone under the tool, and keeping the adjustment mechanism stationary relative to the whetstone;
[0017] S2: adjusting the adjustment mechanism to fix the universal connector at a desired height, and adjusting the connection position between the pull rod and the universal connector so that the tool contacts one end of the whetstone at an initial angle;
[0018] S3: Pull or push the pull rod to move in the first through hole of the universal joint, and make the pull rod rotate with the universal joint, so that the tool moves back and forth on the surface of the grindstone, and the angle between the tool and the grindstone changes, thereby achieving convex grinding of the blade of the tool on the side contacting the grindstone;
[0019] S4: Turn the tool over and fix it on the clamping mechanism again, and repeat steps S2-S3 to perform convex grinding of the blade on the other side of the tool.
[0020] A knife sharpening method adopts a flat grinding method, which is characterized by comprising the following steps:
[0021] S1: Fixing a tool on the clamping mechanism and fixing a whetstone under the tool;
[0022] S2: adjusting the adjustment mechanism to fix the universal connector at a desired height, and adjusting the connection position between the pull rod and the universal connector so that the tool contacts one end of the whetstone at an initial angle;
[0023] S3: Locking the third locking member to fix the pull rod in the universal connector, so that the pull rod and the universal connector and the adjustment mechanism remain relatively stationary;
[0024] S4: Pulling / pushing the pull rod or pushing the adjustment mechanism to slide along the guide rail, so that the tool moves back and forth on the surface of the grindstone. During the movement of the pull rod or the adjustment mechanism, the angle between the tool and the grindstone does not change, thereby achieving flat grinding of the blade of the tool on the side contacting the grindstone;
[0025] S5: Turn the tool over and fix it on the clamping mechanism again, and repeat steps S2-S4 to grind the blade on the other side of the tool.
[0026] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of a knife and a knife sharpening device of the present application;
[0028] Figure 2 A top view of the knife sharpening device structure of the present application;
[0029] Figure 3 This is a front view of the knife sharpening device structure of the present application;
[0030] Figure 4 This is a simplified diagram of the change in the angle between the pull rod and the grindstone during the convex grinding process of the grindstone structure of the present application.
[0031] Among them, there are an adjusting mechanism 1, a sliding rod 11, a first slider 12, a first locking member 13, a second slider 14, a fourth locking member 15, a pull rod 2, a limiting mechanism 22, a sleeve 222, a limiting locking member 224, a whetstone 3, a universal connector 4, an inner ring 42, an outer ring 43, a fixing portion 44, a third locking member 46, a clamping mechanism 5, a second locking member 52, a connecting rod 6, a frame 7, a plate 71, and a guide rail 72. DETAILED DESCRIPTION
[0032] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.
[0033] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0034] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it is to be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0035] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.
[0038] See also Figure 1-3 The utility model discloses a knife sharpening device, comprising an adjusting mechanism 1, a pull rod 2, a whetstone 3, a universal connector 4, a clamping mechanism 5, a connecting rod 6 and a frame 7.
[0039] The frame 7 includes a horizontally arranged flat plate 71 and a guide rail 72. The guide rail 72 extends linearly and is parallel to the extending direction of the guide rail 72. The guide rail 72 is horizontally arranged on one side of the flat plate 71. Preferably, the guide rail 72 includes two guide rods.
[0040] The whetstone 3 is fixedly arranged on the surface of the flat plate 71, parallel to the guide rail 72. The whetstone 3 is a polyhedral structure, having several grinding surfaces with different grinding coefficients, so that the operator can select different grinding surfaces with different grinding coefficients for grinding according to different grinding requirements.
[0041] The adjustment mechanism 1 is arranged on the guide rail 72 and can slide along the guide rail 72; the adjustment mechanism 1 includes a slide bar 11, a first slider 12, a first locking member 13, a second slider 14, and a fourth locking member 15. The second slider 14 is arranged on the guide rail 72 and can slide along the guide rail 72. A fourth locking screw 15 is provided at the connection between the second slider 14 and the guide rail 72. The fourth locking member 15 can fix the second slider 14 at any position of the guide rail 72. The slide bar 11 is vertically arranged on the second slider 14 and slides synchronously with the second slider 14. The slide bar 11 is perpendicular to the linear extension direction of the guide rail 72. The slide bar 11 is provided with the first slider 12 and can slide along the slide bar 11. The first slider 12 is provided with a first locking member 13. Locking the first locking member 13 can fix the first slider 12 at any position of the slide bar 11. In other embodiments, the sliding rod 11 is a screw with an external thread on its surface, the top of the screw is arranged on the outside of the second slider 14, and the rod end of the screw is arranged on the inside of the second slider 14; the first slider 12 is arranged on the rod end of the screw and on the inside of the second slider 12, the inner surface of the first slider 12 in contact with the screw is provided with an internal thread adapted to the external thread, the size of the first slider 12 is adapted to the inner size of the second slider 14, the first slider 12 cannot rotate relative to the second slider 14, and the screw can be rotated relative to the second slider 14 by rotating the top of the screw. Since the first slider 12 cannot rotate relative to the second slider 14, the first slider 12 will move up and down on the screw under the rotational action of the internal thread and the external thread of the screw, thereby realizing the adjustment of the height position of the first slider 12 on the sliding rod 11.
[0042] The universal connector 4 is connected to the adjustment mechanism 1; as a specific embodiment, the universal connector 4 is a fisheye bearing structure, including an outer ring 43, an inner ring 42 and a fixing portion 44 fixedly connected to the inner ring 42; a first through hole is provided at the center of the inner ring 42, and a third locking member 46 is provided on the fixing portion 44; the first slider 12 is fixedly connected to the outer ring 43.
[0043] The pull rod 2 is fixed above the grindstone 3. The pull rod 2 can move back and forth through the first through hole and can rotate with the universal joint 4. Two limiting mechanisms 22 are provided on the pull rod 2. The limiting mechanisms 22 are respectively arranged at any position on both sides of the universal joint 4 on the pull rod 2 and can slide along the pull rod 2. The limiting mechanism 22 includes a sleeve 222 whose inner diameter is adapted to the pull rod 2 and a limiting locking member 224 arranged on the sleeve 222. The limiting locking member 224 is locked to fix the sleeve 222 at any position on both sides of the universal joint 4 on the pull rod 2. The fixing portion 44 is sleeved on the outer surface of the pull rod 2. When the third locking member 46 is locked, the pull rod 2 can be fixed in the universal joint 4, so that the pull rod 2 remains relatively still relative to the adjustment mechanism 1.
[0044] The end of the pull rod 2 close to the grindstone 3 is provided with a clamping mechanism 5 for clamping the tool. As a further improvement of the above solution, the clamping mechanism 5 is rotatably connected to the pull rod 2, and a second locking member 52 is provided on the clamping mechanism 5; Figure 1 As shown, the clamping mechanism 5 includes a clamping end and a fixed end, the clamping end is used to clamp the tool, the fixed end is provided with a fixing groove extending from top to bottom, the clamping mechanism is provided with a locking threaded hole from the side wall to the fixing groove, the locking threaded hole is connected to the fixing groove, the pull rod is inserted into the fixing groove, and the second locking member 52 passes through the locking threaded hole and abuts against the pull rod 2.
[0045] Locking the second locking member 52 fixes the angle between the clamping mechanism 5 and the pull rod 2, further adjusting the initial angle between the tool and the grindstone 3, and also adjusting the direction of the blade of the tool. When the blade faces one side of the pull rod 2, the user can be on the opposite side of the pull rod 2 and push the tool in the direction toward himself, which is convenient for operation and improves safety.
[0046] As a further improvement of the above scheme, the adjustment mechanism 1 is connected to the universal connector 4 via a connecting rod 6; specifically, one end of the connecting rod 6 is fixedly connected to the outer ring 43, and the other end is fixedly connected to the first slider 12. The length of the connecting rod 6 is adjustable, and grinding of different parts of the tool can be achieved by adjusting the length of the connecting rod 6.
[0047] See also Figure 1-4 A knife sharpening method adopts a convex grinding method, which is characterized by comprising the following steps:
[0048] S1: Fix the tool on the clamping mechanism 5, fix a whetstone 3 under the tool, and keep the adjustment mechanism 1 stationary relative to the whetstone 3;
[0049] Specifically, the whetstone 3 is fixedly disposed on the surface of the flat plate 71 below the tool, and the fourth locking member 15 is locked to fix the second sliding block 14 at a desired position of the guide rail 72 .
[0050] S2: adjusting the adjusting mechanism 1 so that the universal connector 4 is fixed at a desired height position, and adjusting the position where the pull rod 2 is connected to the adjusting mechanism 1 so that the tool contacts one end of the whetstone 3 at an initial angle;
[0051] Specifically, adjust the first slider 12 to the required height position on the slide rod 11 and lock the first locking member 13 to fix it, so as to control the height position of the pull rod 2; loosen the third locking member 46 to allow the pull rod 2 to move back and forth through the first through hole and rotate with the universal connector 4; adjust the angle between the clamping mechanism 5 and the pull rod 2.
[0052] S21: adjusting the positions of the limiting mechanism 22 on both sides of the universal connector 4 on the pull rod 2, and locking the limiting locking member 224 to fix the sleeve 222.
[0053] S3: Pull or push the pull rod 2 to move in the first through hole of the universal joint 4, and make the pull rod 2 rotate with the universal joint 4, so that the tool moves back and forth on the surface of the grindstone 3, and the angle between the tool and the grindstone 3 changes, thereby achieving convex grinding of the blade of the tool on the side contacting the grindstone 3;
[0054] S4: Turn the tool over and fix it on the clamping mechanism 5 again, and repeat steps S2-S3 to perform convex grinding of the blade on the other side of the tool.
[0055] A knife sharpening method adopts a flat grinding method, which is characterized by comprising the following steps:
[0056] S1: Fix the tool on the clamping mechanism 5 and fix a whetstone 3 under the tool;
[0057] Specifically, the whetstone 3 is fixedly disposed on the surface of the flat plate 71 below the tool.
[0058] S2: adjusting the adjusting mechanism 1 so that the universal connector 4 is fixed at a desired height position, and adjusting the position where the pull rod 2 is connected to the universal connector 4 so that the tool contacts one end of the whetstone 3 at an initial angle;
[0059] Specifically, the first sliding block 12 is adjusted to a desired height position on the sliding rod 11 and the first locking member 13 is locked to fix it, thereby achieving control of the height position of the pull rod 2;
[0060] S3: Lock the third locking member 46 to fix the pull rod 2 in the universal connector 4, so that the pull rod 2, the universal connector 4 and the adjustment mechanism 1 remain relatively stationary;
[0061] S31: Loosen the fourth locking screw 15 to allow the second sliding block 14 to slide along the guide rail 72;
[0062] S4: Pull / push the pull rod 4 or push the adjustment mechanism 1 to slide along the guide rail 72, so that the tool moves back and forth relative to the whetstone 3; the angle between the tool and the whetstone 3 does not change during the movement of the pull rod 2 or the adjustment mechanism 1, thereby achieving flat grinding of the blade of the tool on the side contacting the whetstone 3;
[0063] S5: Turn the tool over and fix it on the clamping mechanism 5 again, and repeat steps S2-S4 to grind the blade on the other side of the tool.
[0064] The utility model knife sharpening device connects the outer ring of the universal joint to the first slider of the adjustment mechanism, and allows the pull rod to pass through the first through hole of the universal joint. The adjustment mechanism adjusts the height position of the pull rod by adjusting the height position of the first slider on the slide rod; the fourth locking member is locked to fix the adjustment mechanism at the required position of the guide rail so that the adjustment mechanism remains relatively still; at the same time, the angle between the clamping mechanism and the pull rod is adjusted, and the position of the pull rod and the universal joint is adjusted. Through the forward and backward movement and the up and down rotation of the pull rod, the tool fixed on the clamping mechanism contacts the grindstone fixed below the tool at a required initial angle; in addition, the range of change of the tool grinding angle is controlled by adjusting the positions of both sides of the universal joint on the pull rod of the limit mechanism. In the process of pulling or pushing the pull rod to move in the first through hole of the universal joint, since the pull rod rotates with the universal joint, the tool makes a reciprocating motion on the surface of the grindstone, and the angle between the tool and the grindstone changes, thereby realizing the convex grinding of the tool.
[0065] In addition, the knife sharpening device of the present invention can also realize flat grinding of the tool. When the operator wants to adopt the flat grinding method, in addition to adjusting the height position of the first slider on the slide rod, adjusting the angle between the clamping mechanism and the pull rod, and adjusting the position of the pull rod and the universal connector so that the tool contacts the whetstone at a required initial angle, the operator also needs to lock the third locking piece to fix the pull rod in the universal connector, so that the pull rod and the universal connector and the adjustment mechanism remain relatively still and move synchronously, and at the same time loosen the fourth locking piece to allow the adjustment mechanism to slide along the guide rail; in the process of pulling / pushing the pull rod or pushing the adjustment mechanism to slide along the guide rail to make the tool move back and forth relative to the whetstone, the angle between the tool and the whetstone does not change, thereby realizing flat grinding of the tool.
[0066] The user only needs to place or fix the tool on the clamping mechanism, and then pull or push the pull rod to make the tool move back and forth on the grindstone to achieve convex grinding of the tool on the grindstone, or pull / push the pull rod or push the adjustment mechanism to slide along the guide rail to make the tool move back and forth on the grindstone to achieve flat grinding of the tool on the grindstone. This allows inexperienced or inexperienced users to grind out high-quality clam-edge cutting edges without having to master too many grinding skills. The utility model can efficiently grind out excellent clam-edge cutting edges. The knife sharpening device of the utility model has a simple and compact structure and is easy to operate.
[0067] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.
Claims
1. A knife sharpening device, characterized in that: It includes an adjustment mechanism, a pull rod, a universal connector and a clamping mechanism; the universal connector is connected to the adjustment mechanism, and the adjustment mechanism can be adjusted to fix the universal connector at different heights, and the universal connector is provided with a first through hole; the pull rod passes through the first through hole and can move back and forth and can rotate with the universal connector; a clamping mechanism for clamping a tool is provided at one end of the pull rod.
2. The knife sharpening device according to claim 1, characterized in that: The pull rod is provided with two limiting mechanisms, and the limiting mechanisms are respectively arranged on both sides of the universal connector on the pull rod.
3. The knife sharpening device according to claim 2, characterized in that: The limiting mechanism comprises a sleeve with an inner diameter adapted to the pull rod and a limiting locking member arranged on the sleeve, and the limiting locking member can fix the sleeve at any position on the pull rod.
4. The knife sharpening device according to any one of claims 1 to 3, characterized in that: The adjustment mechanism includes a vertically arranged sliding rod, on which a first slider is provided. The first slider can slide along the sliding rod, and the first slider is fixedly connected to the universal connector. The first slider is also provided with a first locking member, which fixes the first slider at any position of the sliding rod.
5. The knife sharpening device according to claim 4, characterized in that: The universal connector is a fisheye bearing structure, including an outer ring and an inner ring, and the first through hole is provided at the center of the inner ring.
6. The knife sharpening device according to claim 5, characterized in that: The clamping mechanism is rotatably connected to the pull rod, and a second locking member is provided on the clamping mechanism to fix the angle between the clamping mechanism and the pull rod.
7. The knife sharpening device according to claim 6, characterized in that: The knife sharpening device also includes a frame, which is provided with a guide rail extending horizontally and linearly; the adjustment mechanism is arranged on the guide rail, and the adjustment mechanism can slide along the guide rail; the universal connector also includes a fixing part, which is fixedly connected to the inner ring and sleeved on the outer surface of the pull rod; the fixing part is provided with a third locking part, and the third locking part fixes the pull rod in the universal connector.
8. The knife sharpening device according to claim 7, characterized in that: The adjustment mechanism also includes a second slider and a fourth locking member; the second slider is arranged on the guide rail and can slide along the guide rail; the sliding rod is arranged on the second slider and slides synchronously with the second slider; a fourth locking member is provided at the position where the second slider is connected to the guide rail, and the fourth locking member can fix the second slider at any position of the guide rail.