Multifunctional knife grinding device

Abstract

The utility model discloses a multifunctional knife sharpening device which comprises a knife sharpening frame, a knife sharpening stone and a knife holder. The knife stone is installed on the knife sharpening frame through an installation structure, a sliding frame is arranged on the knife sharpening frame in a sliding mode, and an installation rod of the sliding frame is located above the knife stone. A tool holder is movably arranged on the sliding frame, and a fixing piece, a first connecting rod, a second connecting rod and a clamping structure of the tool holder are rotationally connected with one another and can be locked after being rotationally connected. The knife sharpening device can adapt to knife sharpening after kitchen knives, long knives and small knives are clamped, so that the used sharpening types are diversified, and the functional requirements of the knife sharpening device are improved.

Description

Technical Field

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

[0002] The sharpening device mainly grinds the blade of the knife to make it sharper, so as to facilitate cutting easy-to-cut objects and food. It is generally used for sharpening kitchen knives or pocket knives.

[0003] The traditional method of sharpening a knife is to hold the back of the knife and the handle and then bring the side of the blade into contact with the grinding surface of the whetstone to perform the sharpening operation. Since the cross-section of the blade is triangular, when the side of the blade contacts the grinding surface of the whetstone during sharpening, there is a certain angle between the back of the knife and the grinding surface of the whetstone. However, the inclination angle of the back of the knife determines the sharpness of the blade after sharpening. However, the inclination angle of manual sharpening may change continuously during the sharpening process, making it difficult to meet the required sharpness of the blade after sharpening. Therefore, people have developed a sharpening device that can fix the angle of the tool on the sharpening stone. However, this type of sharpening device is only for sharpening a single type of knife. However, there are many types of knives in daily life, so it is necessary to purchase multiple tool fixtures, which makes the use cost high, and the fixture needs to be replaced on the whetstone, which makes it inconvenient and cumbersome to use. Utility Model Content

[0004] The purpose of this utility model is to design a multifunctional knife sharpening device to solve the above technical problems.

[0005] The utility model designs a multifunctional knife sharpening device, which comprises a knife sharpening frame, a knife sharpening stone and a knife clamp;

[0006] The whetstone is mounted on the whetstone rack via a mounting structure, a sliding rack is slidably mounted on the whetstone rack, and a mounting rod of the sliding rack is located above the whetstone;

[0007] The tool holder includes a fixing member, a first connecting rod provided along the length direction of the tool sharpening frame, a second connecting rod provided along the width direction of the tool sharpening frame, and two clamping structures for clamping the tool, the mounting rod of the sliding frame is inserted into a first fixing hole provided on the fixing member along the width direction of the tool sharpening frame, the first connecting rod is inserted into a second fixing hole provided on the fixing member along the length direction of the tool sharpening frame, and the two are locked to each other by a first locking structure;

[0008] The second connecting rod is inserted into a third fixing hole provided on the first connecting rod along the width direction of the knife sharpening frame, and the two are locked to each other via a second locking structure;

[0009] Each of the clamping structures includes a first rod body, a second rod and a tool clamping component. The second connecting rod is inserted into a fourth fixing hole provided on each of the first rods along the width direction of the tool sharpening frame, and the two are locked to each other through a third locking structure. The first rod body and the second rod are hinged to each other, and a fourth locking structure is provided at the hinge between the two. The tool clamping component is provided at the end of the second rod.

[0010] According to the multifunctional knife sharpening device described above, a limiting ring is provided on the side of the fixing member away from the second connecting rod, the limiting ring is sleeved on an end portion of the first connecting rod away from the second connecting rod, a fixing bolt is threadedly connected to the limiting ring, and the end face of the fixing bolt contacts the surface of the first connecting rod.

[0011] According to the multifunctional knife sharpening device described above, the second locking structure includes a locking bolt, a threaded hole is provided through the inner wall of the third fixing hole on the first connecting rod, the locking bolt is threadedly connected to the threaded hole, and the end of the locking bolt contacts the surface of the first connecting rod.

[0012] According to the multifunctional knife sharpening device described above, the second locking structure includes a locking bolt, a threaded hole is provided through the inner wall of the third fixing hole on the first connecting rod, the locking bolt is threadedly connected to the threaded hole, and the end of the locking bolt contacts the surface of the first connecting rod.

[0013] According to the multifunctional knife sharpening device described above, the fourth locking structure includes a first gear ring, a second gear ring, a hinge shaft and a nut, and the ends of the first rod and the second rod are respectively provided with a hinge groove and a hinge block, and the hinge block is correspondingly embedded in the hinge groove, and a side wall of the hinge groove is provided with a hexagonal hole and a first circular hole connected to the hexagonal hole, and a second circular hole is provided on the side wall of the first rod opposite to the first circular hole. The hexagonal hole, the first circular hole and the second circular hole are coaxially arranged, and the hinge shaft passes through the hexagonal hole, the first circular hole, the hinge hole of the hinge block and the through-hole of the other side wall of the hinge groove so that its end is placed in the second circular hole and is threadedly connected with the nut, and the part of the hinge shaft located in the hexagonal hole is a hexagonal cylinder, which is adapted to the hexagonal hole, the first gear ring is fixed to the inner end face of the hexagonal cylinder, the second gear ring is fixed on the side wall of the hinge block facing the first circular hole, and the first gear ring and the second gear ring are meshed with each other.

[0014] According to the multifunctional knife sharpening device described above, the tool clamping component includes a fixed splint and a movable splint which are stacked on each other, the fixed splint is arranged at the end of the second rod, the end of the movable splint close to the second rod and the end of the fixed splint close to the second rod are hinged to each other, and the middle part of the movable splint and the middle part of the fixed splint are connected by a connecting bolt, so that the end of the movable splint away from the second rod and the end of the fixed splint away from the second rod are closed together, so that they are both used to clamp the tool.

[0015] According to the multifunctional knife sharpening device described above, friction pads are embedded and fixed on the inner wall of the end of the movable splint away from the second rod and the inner wall of the end of the fixed splint away from the second rod, and the friction pads are provided with friction patterns.

[0016] According to the multifunctional knife sharpening device described above, the third locking structure includes a clamping block located at the end of the first rod, the clamping block is provided with a fourth fixing hole and a gap connected to the fourth fixing hole, and the blocks on opposite sides of the gap are connected by clamping bolts so that the second connecting rod is clamped in the fourth fixing hole.

[0017] According to the multifunctional knife sharpening device described above, the mounting structure includes a fixed plate, and two fixed blocks and a movable block arranged at intervals, the fixed plate and the movable block are respectively fixed to the two ends of the upper plane of the knife sharpening frame, the movable block is located between the fixed plate and the fixed block, the headquarters of the fixed plate is threadedly connected to an adjusting screw, the end of the adjusting screw is connected to the movable block, the whetstone is clamped between the fixed block and the movable block, and the upper ends of the fixed block and the movable block are provided with step surfaces, and each step surface is lower than the upper sharpening surface of the whetstone.

[0018] According to the multifunctional knife sharpening device described above, the sliding frame includes a mounting rod, two oppositely arranged sliding plates, and two oppositely and parallelly arranged guide rods, each guide rod is fixed to the opposite sides of the knife sharpening frame in the length direction, and a slider is slidably mounted on each guide rod, each slider is respectively connected to the lower end of the two sliding plates, the two ends of the mounting rod are respectively connected to the upper end of each sliding plate, and a limit block is installed on at least one guide rod.

[0019] According to the multifunctional knife sharpening device described above, a U-shaped groove is provided at the upper end of each sliding plate, and flat sections are provided at both ends of the mounting rod. The flat sections are placed in the U-shaped groove, and the vertical surfaces of the flat sections are parallel to the vertical surfaces of the U-shaped groove and are arranged close to each other.

[0020] According to the multifunctional knife sharpening device described above, limiting plates are fixed to both ends of the second connecting rod, and the diameter of the limiting plates is larger than the diameter of the second connecting rod.

[0021] The utility model is a multifunctional knife sharpening device, in which the first connecting rod on the knife clamp can be moved along the length direction of the knife sharpening frame, and the second connecting rod is positioned after being rotated on the first connecting rod, and the clamping structure can also be positioned after being rotated on the second connecting rod. The distance between the two clamping structures can also be adjusted, so that it can adapt to kitchen knives, long knives and small knives for clamping and sharpening, thereby diversifying the types of knives that can be sharpened and improving the functional requirements of the knife sharpening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is the overall structure diagram of the utility model (1);

[0023] Figure 2 This is the overall structure diagram of the utility model (II);

[0024] Figure 3 This is the overall structure diagram of the utility model (3);

[0025] Figure 4 This is the overall structure diagram of the utility model (four);

[0026] Figure 5 It is the structural diagram of the clamping structure (I);

[0027] Figure 6 It is the structural diagram of the clamping structure (II);

[0028] Figure 7 is a structural diagram of the first ring gear and the second ring gear;

[0029] Figure 8 It is a partial structural diagram (I);

[0030] Figure 9 This is the local structure diagram (2).

[0031] In the figure: 1. sharpening frame; 2. sliding frame; 21. sliding plate; 22. mounting rod; 23. guide rod; 24. stopper; 25. slider; 211. U-shaped groove; 221. flat section; 3. tool holder; 31. first connecting rod; 32. fixing member; 33. second connecting rod; 34. clamping structure; 35. stopper plate; 36. stopper ring; 37. handle; 38. fixing bolt; 311. third fixing hole; 312. locking bolt; 321. first fixing hole; 322. second fixing hole; 323. gap; 324. clamping bolt; 340. clamping block; 341. First rod; 342, second rod; 343, fourth fixing hole; 346, hinge block; 347, hinge slot; 348, hinge shaft; 349, first circular hole; 350, hexagonal hole; 351, hinge hole; 352, through hole; 353, nut; 354, second circular hole; 355, movable splint; 356, fixed splint; 358, connecting bolt; 359, friction gasket; 4, mounting structure; 41, fixed block; 42, movable block; 43, fixed plate; 44, adjusting screw; 410, stepped surface; 5, whetstone; 331, octagonal structure; 357, hexagonal column; DETAILED DESCRIPTION

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0033] A multifunctional knife sharpening device described in this embodiment includes a knife sharpening rack 1, a sharpening stone 5, and a knife clip 3. Among them, the knife sharpening rack 1 is in an inverted "U" shape, and the sharpening stone 5 is in a cuboid structure.

[0034] The sharpening stone 5 is installed on the knife sharpening rack 1 through an installation structure 4. The installation structure 4 includes a fixing plate 43, and two fixing blocks 41 and movable blocks 42 arranged at intervals. The fixing plate 43 and the movable block 42 are respectively fixed at both ends of the upper plane of the knife sharpening rack 1. The movable block 42 is located between the fixing plate 43 and the fixing block 41. A regulating screw 44 is threadedly connected to the end of the fixing plate 43, and the end of the regulating screw 44 is connected to the movable block 42. When the sharpening stone 5 is placed between the fixing block 41 and the movable block 42, the movable block 42 is driven to displace towards the fixing block 41 by rotating the regulating screw 44, so that the sharpening stone 5 is clamped and fixed between the fixing block 41 and the movable block 42.

[0035] Step surfaces 410 are provided at the upper ends of the fixing block 41 and the movable block 42, and each step surface 410 is lower than the upper sharpening surface of the sharpening stone 5. The setting of the step surface 410 can prevent the blade of the tool from colliding with the fixing block 41.

[0036] A sliding rack 2 is slidably arranged on the knife sharpening rack 1, and the mounting rod 22 of the sliding rack 2 is located above the sharpening stone 5. The sliding rack 2 includes a mounting rod 22, two relatively arranged sliding plates 21, and two relatively and parallel guide rods 23. Each guide rod 23 is respectively fixed on the opposite sides in the length direction of the knife sharpening rack 1. A slider 25 is slidably installed on each guide rod 23, and each slider 25 is respectively connected to the lower ends of the two sliding plates 21. The two ends of the mounting rod 22 are respectively connected to the upper ends of the two sliding plates 21. The sliding plate 21 can slide along the length direction of the guide rod 23, so that the tool clamped on the knife clip 3 makes a reciprocating displacement along the length direction of the sharpening stone 5 for knife sharpening operation.

[0037] When it is necessary to limit the distance of the reciprocating displacement of the knife sharpening, a limiting block 24 can be installed on at least one guide rod 23. A gap 323 is provided on the limiting block 24, and the guide rod 23 is inserted into the through hole of the limiting block 24. The relative two side parts of the gap 323 are connected by a clamping bolt 324, so that the through hole of the limiting block 24 is deformed, and the guide rod 23 is clamped in the through hole.

[0038] In this embodiment, the tool holder 3 includes a fixing part 32, a first connecting rod 31 arranged along the length direction of the tool sharpening frame 1, a second connecting rod 33 arranged along the width direction of the tool sharpening frame 1, and two clamping structures 34 for clamping the tool. The specific structures that cooperate with each other are as follows.

[0039] The mounting rod 22 of the sliding frame 2 is inserted into a first fixing hole 321 on the fixing member 32 arranged along the width direction of the knife sharpening frame 1; this enables the fixing member 32 to move along the length of the mounting rod 22, so that the position of the blade in contact with the sharpening surface can be adjusted at any time to sharpen the blade more comprehensively.

[0040] The first connecting rod 31 is inserted into a second fixing hole 322 provided on the fixing piece 32 in the longitudinal direction of the knife sharpening frame 1, and the two are locked with each other by a first locking structure; the inner wall of the second fixing hole 322 of the fixing piece 32 is provided with a gap 323 communicating with the outside world, and the opposite sides of the gap 323 are connected by clamping bolts 324. When the first connecting rod 31 is axially moved and adjusted to a suitable position, the clamping bolts 324 are turned to make the gap 323 smaller, so as to deform the second fixing hole 322 and clamp the first connecting rod 31 in the second fixing hole 322, thereby fixing the first connecting rod 31 in a suitable position.

[0041] The second connecting rod 33 is passed through a third fixing hole 311 provided on the first connecting rod 31 along the width direction of the sharpening frame 1, and the two are locked with each other by a second locking structure; wherein the third fixing hole 311 is located at one end of the first connecting rod 31 facing the clamping structure 34, and in the middle of the second connecting rod 33, the second locking structure includes a locking bolt 312, and a threaded hole is provided through the inner wall of the third fixing hole 311 on the first connecting rod 31, and the locking bolt 312 is threadedly connected to the threaded hole, and the end of the locking bolt 312 contacts the surface of the first connecting rod 31 to fix the second connecting rod 33 in the third fixing hole 311; in order to make the fixation of the second connecting rod 33 more stable, the middle part of the second connecting rod 33 can be a polygonal structure, generally an octagonal structure 331 is adopted, so that the end of the locking bolt 312 can contact the plane of the octagonal structure 331 in the middle part of the second connecting rod 33 to prevent the second connecting rod 33 from rotating after the position is locked.

[0042] Each of the clamping structures 34 includes a first rod 341 body, a second rod 342 and a tool clamping component. The second connecting rod 33 is inserted into a fourth fixing hole 343 provided on each of the first rods 341 along the width direction of the tool sharpening frame 1, and the two are locked with each other by a third locking structure. The third locking structure includes a clamping block 340 located at the end of the first rod 341. The clamping block 340 is provided with a fourth fixing hole 343 and a gap 323 connected to the fourth fixing hole 343. The blocks on opposite sides of the gap 323 are connected by clamping bolts 324. When the first rod 341 is rotated to a suitable angle around the axis of the second connecting rod 33, the clamping bolt 324 is screwed to deform the fourth fixing hole 343 so that the second connecting rod 33 is clamped and fixed in the fourth fixing hole 343.

[0043] The first rod 341 and the second rod 342 are hinged to each other, and a fourth locking structure is provided at the hinge between the two, and the tool holding component is provided at the end of the second rod 342; specifically, the fourth locking structure includes a first gear ring, a second gear ring, a hinge shaft 348 and a nut 353, and the end of the first rod 341 and the end of the second rod 342 are respectively provided with a hinge groove 347 and a hinge block 346, and the hinge block 346 is correspondingly embedded in the hinge groove 347, and a side wall of the hinge groove 347 is provided with a hexagonal hole 350 and a first circular hole 349 connected to the hexagonal hole 350, and a second circular hole 354 is provided on the side wall of the first rod 341 opposite to the first circular hole 349, the hexagonal hole 350, the first circular hole 349 and the second circular hole 354 are coaxially arranged, and the hinge shaft 348 passes through the hexagonal hole 350, the first circular hole 349 and the second circular hole 354. After the hole 349, the hinge hole 351 of the hinge block 346 and the through hole 352 on the other side wall of the hinge groove 347 are inserted, the end portion of the hinge shaft 348 is placed in the second circular hole 354 and is threadedly connected with the nut 353. The part of the hinge shaft 348 located at the hexagonal hole 350 is a hexagonal cylinder 357, which is adapted to the hexagonal hole 350. The first gear ring is fixed to the inner end face of the hexagonal cylinder, and the second gear ring is fixed on the side wall of the hinge block 346 facing the first circular hole 349. When the angle between the first rod 341 and the second rod 342 is adjusted to a suitable angle, the nut 353 is tightened to make the first gear ring and the second gear ring engage with each other to lock the first rod 341 and the second rod 342. When readjustment is needed, the nut 353 is loosened to separate the first gear ring and the second gear ring from each other, prompting the first rod 341 and the second rod 342 to rotate relative to each other.

[0044] In this embodiment, a limiting ring 36 is provided on the side of the fixing member 32 away from the second connecting rod 33, and the limiting ring 36 is sleeved on the end of the first connecting rod 31 away from the second connecting rod 33. A fixing bolt 38 is threadedly connected to the limiting ring 36, and the end face of the fixing bolt 38 conflicts with the surface of the first connecting rod 31, which can further limit the first connecting rod 31 to prevent the first connecting rod 31 from axial movement during the sharpening process. The displacement facilitates the adjustment of the position of the limiting ring 36, and a handle 37 can be provided on the side wall of the limiting ring 36.

[0045] In this embodiment, the tool clamping component includes a fixed splint 356 and a movable splint 355 which are stacked on each other. The fixed splint 356 is arranged at the end of the second rod 342. The end of the movable splint 355 close to the second rod 342 and the end of the fixed splint 356 close to the second rod 342 are hinged to each other. The middle part of the movable splint 355 and the middle part of the fixed splint 356 are connected by a connecting bolt 358, so that the end of the movable splint 355 away from the second rod 342 and the end of the fixed splint 356 away from the second rod 342 are closed together so that they are both used to clamp the tool.

[0046] In this embodiment, a friction gasket 359 is embedded and fixed on the inner wall of the end of the movable splint 355 away from the second rod 342 and the inner wall of the end of the fixed splint 356 away from the second rod 342. The two can be fixed to each other by glue. The friction gasket 359 is provided with friction grooves on the side facing the back of the knife, so that the clamping of the knife is more stable.

[0047] In this embodiment, a U-shaped groove 211 is provided at the upper end of each sliding plate 21, and flat sections 221 are provided at both ends of the mounting rod 22. The flat sections 221 are placed in the U-shaped groove 211. The vertical surface of the flat section 221 is parallel to the vertical surface of the U-shaped groove 211 and is arranged close to each other. Its structural setting can prevent the mounting rod 22 from rotating.

[0048] In this embodiment, limiting plates 35 are fixed at both ends of the second connecting rod 33. The diameter of the limiting plates 35 is larger than the diameter of the second connecting rod 33. The limiting plates 35 and the second connecting rod 33 are connected by threads. The structure can prevent the clamping structure 34 from falling off from the second connecting rod 33 when adjusting the position.

[0049] A plurality of guide rods are provided on the movable block 42 , and the guide rods are passed through the guide holes of the fixed plate 43 , so that the movable block 42 can be displaced more smoothly.

Claims

1. A multifunctional knife sharpening device comprising a knife sharpening frame (1), a whetstone (5) and a knife holder (3); The whetstone (5) is mounted on the whetstone rack (1) via a mounting structure (4); a sliding rack (2) is slidably mounted on the whetstone rack (1); and a mounting rod (22) of the sliding rack (2) is located above the whetstone (5); The tool holder (3) comprises a fixing member (32), a first connecting rod (31) arranged along the length direction of the tool sharpening frame (1), a second connecting rod (33) arranged along the width direction of the tool sharpening frame (1), and two clamping structures (34) for clamping the tool, the mounting rod (22) of the sliding frame (2) is inserted into a first fixing hole (321) arranged on the fixing member (32) along the width direction of the tool sharpening frame (1), the first connecting rod (31) is inserted into a second fixing hole (322) arranged on the fixing member (32) along the length direction of the tool sharpening frame (1), and the two are locked to each other via a first locking structure; The second connecting rod (33) is inserted into a third fixing hole (311) provided on the first connecting rod (31) along the width direction of the knife sharpening frame (1), and the two are locked to each other via a second locking structure; Each of the clamping structures (34) comprises a first rod (341) body, a second rod (342) and a tool clamping component; the second connecting rod (33) is inserted into a fourth fixing hole (343) provided on each of the first rods (341) along the width direction of the tool sharpening frame (1), and the two are locked to each other via a third locking structure; the first rod (341) body and the second rod (342) are hinged to each other, and a fourth locking structure is provided at the hinge between the two; and the tool clamping component is provided at the end of the second rod (342).

2. A multifunctional knife sharpening device according to claim 1, characterized in that: A limiting ring (36) is provided on the side of the fixing member (32) away from the second connecting rod (33), and the limiting ring (36) is sleeved on an end portion of the first connecting rod (31) away from the second connecting rod (33). A fixing bolt (38) is threadedly connected to the limiting ring (36), and the end face of the fixing bolt (38) contacts the surface of the first connecting rod (31).

3. A multifunctional knife sharpening device according to claim 1, characterized in that: The second locking structure includes a locking bolt, a threaded hole is provided through the inner wall of the third fixing hole (311) on the first connecting rod (31), the locking bolt is threadedly connected in the threaded hole, and the end of the locking bolt contacts the surface of the first connecting rod (31).

4. A multifunctional knife sharpening device according to claim 1, characterized in that: The fourth locking structure includes a first gear ring, a second gear ring, a hinge shaft (348) and a nut (353), and the end of the first rod (341) and the end of the second rod (342) are respectively provided with a hinge groove (347) and a hinge block (346), and the hinge block (346) is correspondingly embedded in the hinge groove (347), and a side wall of the hinge groove (347) is provided with a hexagonal hole (350) and a first circular hole (349) connected to the hexagonal hole (350), and a second circular hole (354) is provided on the side wall of the first rod (341) opposite to the first circular hole (349), and the hexagonal hole (350), the first circular hole (349) and the second circular hole (354) are connected to each other. 54) are coaxially arranged, and the hinge shaft (348) passes through the hexagonal hole (350), the first circular hole (349), the hinge hole (351) of the hinge block (346) and the through hole (352) on the other side wall of the hinge groove (347), so that its end is placed in the second circular hole (354) and is threadedly connected with the nut (353). The part of the hinge shaft (348) located in the hexagonal hole (350) is a hexagonal column, which is adapted to the hexagonal hole (350). The first gear ring is fixed to the inner end face of the hexagonal column, and the second gear ring is fixed to the side wall of the hinge block (346) facing the first circular hole (349), and the first gear ring and the second gear ring are meshed with each other.

5. A multifunctional knife sharpening device according to claim 4, characterized in that: The tool clamping component includes a fixed clamping plate (356) and a movable clamping plate (355) which are stacked on each other, the fixed clamping plate (356) is arranged at the end of the second rod (342), the end of the movable clamping plate (355) close to the second rod (342) and the end of the fixed clamping plate (356) close to the second rod (342) are hinged to each other, and the middle part of the movable clamping plate (355) and the middle part of the fixed clamping plate (356) are connected by a connecting bolt (358), so that the end of the movable clamping plate (355) away from the second rod (342) and the end of the fixed clamping plate (356) away from the second rod (342) are closed together so that they are used to clamp the tool.

6. A multifunctional knife sharpening device according to claim 5, characterized in that: A friction pad (359) is embedded and fixed on the inner wall of the end of the movable splint (355) away from the second rod (342) and the inner wall of the end of the fixed splint (356) away from the second rod (342), and the friction pad (359) is provided with friction lines.

7. The multifunctional knife sharpening device according to claim 1, characterized in that: The third locking structure includes a clamping block (340) located at the end of the first rod (341), and the clamping block (340) is provided with a fourth fixing hole (343) and a gap (323) connected to the fourth fixing hole (343). The blocks on opposite sides of the gap (323) are connected by clamping bolts (324) so that the second connecting rod (33) is clamped in the fourth fixing hole (343).

8. The multifunctional knife sharpening device according to claim 1, characterized in that: The mounting structure (4) comprises a fixed plate (43), two fixed blocks (41) and a movable block (42) arranged at intervals, the fixed plate (43) and the movable block (42) being fixed to two ends of an upper plane of the sharpening frame (1) respectively, the movable block (42) being located between the fixed plate (43) and the fixed block (41), the head of the fixed plate (43) being threadedly connected to an adjusting screw (44), the end of the adjusting screw (44) being connected to the movable block (42), the sharpening stone (5) being clamped between the fixed block (41) and the movable block (42), the upper ends of the fixed block (41) and the movable block (42) being provided with a stepped surface (410), each stepped surface (410) being lower than the upper sharpening surface of the sharpening stone (5).

9. The multifunctional knife sharpening device according to claim 1, characterized in that: The sliding frame (2) comprises a mounting rod (22), two oppositely arranged sliding plates (21), and two oppositely and parallelly arranged guide rods (23), each guide rod (23) being fixed to opposite sides of the length direction of the sharpening frame (1), each guide rod (23) being slidably mounted with a slider (25), each slider (25) being connected to the lower end of the two sliding plates (21), the two ends of the mounting rod (22) being connected to the upper end of each sliding plate (21), and at least one guide rod (23) being mounted with a limit block (24); The upper end of each sliding plate (21) is provided with a U-shaped groove (211), and both ends of the mounting rod (22) are provided with flat sections (221). The flat sections (221) are placed in the U-shaped groove (211), and the vertical surface of the flat section (221) is parallel to the vertical surface of the U-shaped groove (211) and is arranged close to each other.

10. The multifunctional knife sharpening device according to claim 1, characterized in that: Limiting plates (35) are fixed to both ends of the second connecting rod (33), and the diameter of the limiting plates (35) is larger than the diameter of the second connecting rod (33).

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