Knife sharpening angle setting device

Abstract

The utility model relates to the technical field of knife sharpeners, in particular to a knife sharpening angle fixing device, which comprises a chuck component and is characterized in that the chuck component comprises a clamping jaw, the clamping jaw is made of process plastics, a guide positioning shaft is arranged in the center of the clamping jaw, a connecting shaft is arranged at one end of the guide positioning shaft, a double-rotation-direction threaded shaft is arranged below the clamping jaw, and a rotating shaft is arranged below the connecting shaft. A rolling shaft is arranged in the center of the double-rotation-direction threaded shaft, internal and external thread nuts are arranged at the two ends of the double-rotation-direction threaded shaft, and a manual loosening and tightening nut is arranged at one end of the edge of the double-rotation-direction threaded shaft. The left clamping jaw and the right clamping jaw move synchronously through the double-rotation-direction threaded shaft, and cutting edge eccentric wear caused by single-side deviation is prevented; the friction force of the nano silicon carbide anti-skid coating is enhanced through a micron-sized bulge structure, so that the cutter can be stably grabbed even if the cutter is wetted or the surface is polished; the design of trapezoidal threads and the rolling shaft enables clamping force to be evenly distributed, and damage to the cutting edge due to overlarge local pressure is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a knife sharpener technical field, in particular to a knife sharpener angle fixer. BACKGROUND

[0002] The conventional knife sharpener angle fixer has the following technical pain points: the conventional clamp adopts HT200 cast iron clamping jaw, needs to go through casting, machining, surface treatment and multiple processes, and has high production cost and low efficiency; the traditional metal clamping jaw directly rubs with the double-rotation screw shaft, is easy to wear after long-term use, and causes the clamping force to drop and the threaded cooperation to loosen; the metal clamping jaw is relatively heavy and is easy to rust, which affects the user experience and product life.

[0003] A kind of angle fixer for grinding knife is disclosed in Chinese patent (publication number: CN 218556459 U), which includes positioning base plate, positioning base plate upper end detachably connected with the compression plate for compressing blade, the compression plate interior is screwed with fixed screw, the fixed screw passes through compression plate and is screwed with positioning base plate, the positioning base plate lower end detachably connected with angle adjusting plate, the angle adjusting plate interior is rotatably connected with gyro wheel, but this kind of angle fixer for grinding knife has the shortcomings of complex manufacturing process, easy to wear, heavy and easy to rust, therefore a kind of knife sharpener angle fixer is needed. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings of the prior art, such as complex manufacturing process, easy to wear, heavy and easy to rust, and provides a kind of knife sharpener angle fixer.

[0005] The utility model solves the technical scheme that the utility model discloses a kind of knife sharpener angle fixer, including chuck assembly, it is characterized in that:the chuck assembly includes clamping jaw, the clamping jaw material is craft plastic, the clamping jaw center is equipped with guide positioning shaft, the guide positioning shaft one end is equipped with connecting shaft, the clamping jaw below is equipped with double-rotation screw shaft, the double-rotation screw shaft center is equipped with roller axle, the double-rotation screw shaft both ends are equipped with inner and outer toothed nut, the double-rotation screw shaft edge one end is equipped with hand-operated tension nut.Precise positioning: the synergies of guide shaft and double-rotation screw make tool always keep stable angle in grinding process, avoid the axial deviation problem of conventional clamp;Two-way self-adapting: symmetric screw thread design lets clamping jaw can be moved synchronously in / out, adapt to different blade thickness tools (such as kitchen knife V-shaped blade, scissors special-shaped blade);Operation simplification: single-handed rotation tension nut can complete the whole process of clamping-release, solve the pain point that conventional tool needs two-hand cooperation.

[0006] Preferably, the inner side working surface of the clamping jaw is provided with an anti-skid coating, which is a nano-sized silicon carbide composite material layer, and the surface of the layer is provided with staggered micro-sized convex structures with a height of 50-100 mu m. The micro-convex structures generate molecular-level adsorption force, can reliably grip the polished metal surface, and avoid damage to the cutting edge caused by sliding of the tool during tool sharpening; the staggered convex structures form hydrophobic channels to prevent the residual of the tool sharpening mud and prolong the maintenance cycle; the nano-sized hardness is much lower than that of the tool steel material, so that no indentation is left on the blade surface during clamping.

[0007] Preferably, the clamping jaw and the inner and outer toothed nuts are integrally formed by a powder metallurgy process. The structural integrity eliminates the risk of loosening of the traditional screw connection structure, and the service life of the threaded pair is increased by more than 3 times; the nut leveling process is omitted, and the installation time is shortened by 70%.

[0008] Preferably, the thread type of the double-rotation-direction threaded shaft is trapezoidal thread, and the thread rise angle is 5-8°. The large contact surface thread reduces the rotating friction force while maintaining self-locking, and realizes fine adjustment of the hand feeling; the specific rise angle range ensures that temporary positioning can be maintained in the unlocked state to prevent accidental loosening; the trapezoidal structure naturally forms a debris discharge channel, and still maintains smoothness after long-term use.

[0009] Preferably, the manual tension nut is provided with a standard slot on the outer wall center, the slot depth is 1-1.5 mm, the slot width is 2-3 mm, and the slot bottom is arc transition. The standard slot is compatible with any slot screwdriver, and a coin can be used to replace the operation in an emergency; the arc slot bottom will emit a "click" sound when tightened, providing a torque in place prompt.

[0010] Preferably, the outer clamping stroke range of the clamping jaw is 45-80 mm, and the inner clamping stroke range of the clamping jaw is 0-40 mm. The full-scene coverage avoids the replacement of adapters for single-clamp solutions from bone cutting knives to surgical knives; mechanical limiting prevents deformation of small tools caused by excessive clamping; the operator can intuitively judge the type of the applicable tool through the exposed length of the clamping jaw.

[0011] The utility model has the advantages that:

[0012] The application ensures that the cutter is always perpendicular to the grinding stone through the guide positioning shaft, avoids angle deviation when manually grinding the cutter, and the double helical thread shaft synchronously moves the left and right clamping jaws to prevent blade edge deviation caused by unilateral deviation; the nano silicon carbide anti-skid coating enhances the friction force through the micron-level convex structure, so that the cutter can be firmly gripped even if the cutter is wet or the polishing surface is wet; the trapezoidal thread+roller shaft design uniformly distributes the clamping force to avoid local excessive pressure from damaging the cutter edge; the outer clamp of 45-80mm can fix thick blade tools such as bone cutting knives and chopping knives; the inner clamp of 0-40mm is suitable for thin blade tools such as fruit knives and carving knives; the powder metallurgy integrally formed clamping jaw and nut structure ensures that the clamping jaw does not deform during long-term use and is compatible with different knife types; the standard slot design of the manual tension nut can be quickly adjusted by using a screwdriver or a coin without the need for two-handed cooperation; the self-locking property of the double helical thread automatically maintains the clamping force during cutter grinding without the need for repeated adjustment; the impact-resistant and corrosion-resistant plastic clamping jaw is lighter than the metal clamp and does not damage the knife surface; the hydrophobic structure of the anti-skid coating reduces the adhesion of the cutter mud, and the cleaning is clean after one flush. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.

[0014] Fig. 1 It is a structural schematic diagram of the present application.

[0015] Fig. 2 It is a structural sectional view of the present application.

[0016] Fig. 3 It is a top view structural schematic diagram of the present application.

[0017] In the figure: 1, clamping jaw; 2, anti-skid coating; 3, connecting shaft; 4, inner and outer tooth nut; 5, double helical thread; 6, guide positioning shaft; 7, roller shaft; 8, manual tension nut; 9, standard slot. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] EMBODIMENT

[0020] Please refer to Figs. 1-3 As shown in the figure, a knife angle fixer includes a chuck assembly, characterized in that: the chuck assembly includes a jaw 1, the jaw 1 is made of plastic, the jaw 1 is provided with a guide positioning shaft 6 at the center, one end of the guide positioning shaft 6 is provided with a connecting shaft 3, the jaw 1 is provided with a double-rotation thread 5 shaft below, the double-rotation thread 5 shaft is provided with a roller shaft 7 at the center, both ends of the double-rotation thread 5 shaft are provided with inner and outer tooth nuts 4, one end of the edge of the double-rotation thread 5 shaft is provided with a manual tension nut 8. Precise positioning: the cooperation of the guide shaft and the double-rotation thread 5 can keep the tool at a stable angle during the grinding process, avoiding the axial deviation problem of traditional clamps; two-way self-adaptation: the symmetrical thread design allows the jaw 1 to move inward / outward synchronously, adapting to tools with different blade thicknesses (such as kitchen knives with V-shaped blades and scissors with special-shaped blades); operation simplification: single-handed rotation of the tension nut can complete the entire clamping-releasing process, solving the pain point of traditional tools that require two-handed cooperation.

[0021] In this embodiment, the inner side working surface of the jaw 1 is provided with an anti-skid coating 2, which is a nano-sized silicon carbide composite material layer, and the surface is provided with staggered micro-sized convex structures with a height of 50-100 μm. The micro-convex structure generates molecular-level adsorption force, which can still reliably grasp the polished metal surface, avoiding damage to the blade edge caused by tool sliding during knife grinding; the staggered convex structures form hydrophobic channels to prevent the residue of knife grinding mud, extending the maintenance cycle; the nano-level hardness is much lower than that of tool steel, ensuring that no indentation is left on the blade surface during clamping.

[0022] In this embodiment, the jaw 1 and the inner and outer tooth nuts 4 are integrally formed by powder metallurgy process. Structural integrity: eliminates the risk of loosening of traditional screw connection structure, and the service life of the thread pair is improved by more than 3 times; the nut leveling process is omitted, and the installation time is shortened by 70%.

[0023] In this embodiment, the thread type of the double-rotation thread 5 shaft is trapezoidal thread, and the thread rise angle is 5°-8°. The large contact surface thread maintains self-locking while reducing rotational friction, achieving fine adjustment feel; a specific rise angle range ensures that temporary positioning can still be maintained in the unlocked state, preventing accidental loosening; the trapezoidal structure naturally forms a debris discharge channel, which remains smooth after long-term use.

[0024] In this embodiment, the outer wall center of the manual tension nut 8 is provided with a standard slot 9, the slot depth is 1-1.5 mm, the slot width is 2-3 mm, and the slot bottom is a circular arc transition. The standard slot is compatible with any flathead screwdriver, and a coin can be used to replace the operation in an emergency; the circular arc slot bottom will emit a "click" sound when tightened, providing a torque in place prompt.

[0025] In this embodiment, the outer clamping stroke range of the clamping jaw 1 is 45-80 mm, and the inner clamping stroke range of the clamping jaw 1 is 0-40 mm. Full scene coverage, from bone cutting knives to surgical knives, avoids adapter replacement; mechanical limiting prevents small tool deformation caused by excessive clamping; the operator can intuitively determine the type of tool by the exposed length of the clamping jaw 1.

[0026] The implementation principle of this embodiment is:

[0027] 1. Knife mounting stage (initial clamping)

[0028] When the knife needs to be sharpened, first insert the knife between the clamping jaws 1, the anti-slip coating 2 on the inner side of the clamping jaw 1 will tightly bite the knife surface to prevent slipping; if the knife is thicker, move the clamping jaw 1 outward to expand it axially along the double-helix thread 5, which can support an outer clamping stroke of 80 mm at most; if the knife is thinner, push the clamping jaw 1 inward to contract it axially along the double-helix thread 5, which can clamp a narrow blade knife of 0-40 mm at least.

[0029] 2. Locking stage (fixed angle)

[0030] When the knife position is adjusted, rotate the hand-tightening nut 8 (the outer wall has a one-way groove, which facilitates tightening with a screwdriver or a coin) to drive the double-helix thread 5 shaft to rotate; due to the double-helix design of the thread shaft, the inner and outer nut 4 at both ends will be synchronized to tighten or loosen towards the center, ensuring that the clamping jaws 1 are symmetrically clamped and will not be skewed; when fine-tuning the clamping force is needed, the design of the trapezoidal thread (5°-8° rise angle) makes the rotation smoother, which can lock tightly without being stuck.

[0031] 3. Knife sharpening stage (stable grinding)

[0032] When the knife is clamped, the guide positioning shaft 6 ensures that the knife is always perpendicular to the knife sharpening stone, avoiding angle deviation; if there is vibration during sharpening, the plastic material of the clamping jaw 1 can absorb part of the vibration, and the internal powder metallurgy integrated structure provides rigid support to prevent deformation; if there are debris or water stains during the sharpening process, the micron protrusion structure of the anti-slip coating 2 can reduce the accumulation of mud and maintain stable clamping.

[0033] 4. Disassembly stage (quick release)

[0034] When the sharpening is completed, rotate the hand-tightening nut 8 in the opposite direction, the double-helix thread 5 shaft drives the clamping jaw 1 to loosen, and the knife can be easily removed; if long-term use causes the thread shaft to rotate stiffly, the central roller 7 can reduce friction, making the tightening operation more labor-saving.

[0035] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and the description in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A knife angle setter comprising a collet assembly, characterised in that The chuck assembly comprises a clamping jaw (1) made of engineering plastic, a guide positioning shaft (6) arranged at the center of the clamping jaw (1), a connecting shaft (3) arranged at one end of the guide positioning shaft (6), a double-rotation thread shaft (5) arranged below the clamping jaw (1), a roller shaft (7) arranged at the center of the double-rotation thread shaft (5), inner and outer toothed nuts (4) arranged at both ends of the double-rotation thread shaft (5), and a hand-operated tension nut (8) arranged at one end of the edge of the double-rotation thread shaft (5).

2. A sharpener angle setter as claimed in claim 1, wherein: The inner working surface of the clamping jaw (1) is provided with an anti-skid coating (2) which is a nano-sized silicon carbide composite material layer, and the surface of the anti-skid coating (2) is provided with staggered micro-sized convex structures with a height of 50-100 μm.

3. A sharpener angle setter as claimed in claim 1, wherein: The clamping jaw (1) and the inner and outer toothed nuts (4) are integrally formed by a powder metallurgy process.

4. A sharpener angle setter as claimed in claim 1, wherein: The thread type of the double-rotation thread shaft (5) is trapezoidal thread, and the thread rise angle is 5°-8°.

5. A sharpener angle setter as claimed in claim 1, wherein: The outer wall of the hand-operated tension nut (8) is provided with a standard straight thread groove (9) at the center, the groove depth is 1-1.5 mm, the groove width is 2-3 mm, and the groove bottom is circularly arc-shaped.

6. A sharpener angle setter as claimed in claim 1, wherein: The outer clamping stroke range of the clamping jaw (1) is 45-80 mm, and the inner clamping stroke range of the clamping jaw (1) is 0-40 mm.

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