Fixed-angle knife sharpener

Abstract

Disclosed in the present application is a fixed-angle knife sharpener, comprising a guide support body, an adjustment mechanism, a knife-clamping mechanism, and a grinding mechanism, wherein two adjustment mechanisms are provided and are respectively arranged on two sides of the knife-clamping mechanism, or, one adjustment mechanisms is provided and is arranged on one side of the knife-clamping mechanism; the adjustment mechanism comprises an adjustment base that is mounted on the guide support body; and the grinding mechanism is mounted on the adjustment mechanism. When the fixed-angle knife sharpener performs grinding, the adjustment base can move along the guide support body or can move together with the guide support body to adjust a distance relative to the knife-clamping mechanism. The adjustment mechanism is configured to adjust a first inclination angle of the grinding mechanism by means of one of or a combination of multi-angle position adjustment and stepless adjustment, and to keep the adjusted first inclination angle in a fixed state. When the fixed-angle knife sharpener performs grinding, the grinding mechanism can rotate relative to the adjustment base to achieve a grinding action.

Description

Fixed angle grinder Technical Field

[0001] This disclosure relates to the field of knife sharpener technology, and in particular to a fixed-angle knife sharpener. Background Technology

[0002] Traditional horizontal double-sided fixed-angle sharpeners adjust the angle between the grinding stone and the blade by adjusting the distance between the pivot point of the grinding rod and the contact point between the grinding rod and the blade. This makes it difficult to achieve precise angle adjustment. Furthermore, traditional products cannot achieve a more flexible sharpening effect during the sharpening process and cannot maintain the sharpening angle at all times. Summary of the Invention

[0003] The purpose of this disclosure is to provide a fixed-angle sharpener that can conveniently adjust the distance between the sharpening tool and the cutting tool, such as a whetstone or sandpaper, thus solving the problem of low flexibility in the current sharpening process of fixed-angle sharpeners.

[0004] To address the aforementioned problems, this disclosure provides a fixed-angle sharpener, comprising a guide support, an adjustment mechanism, a tool clamping mechanism, and a sharpening mechanism. The adjustment mechanism is provided in two or one sets, with the two sets respectively positioned on both sides of the tool clamping mechanism, or one set positioned on one side of the tool clamping mechanism. Each adjustment mechanism includes an adjustment base mounted on the guide support, and the sharpening mechanism mounted on the adjustment mechanism. When the fixed-angle sharpener is sharpening, the adjustment base can move along the guide support or move with the guide support to adjust the distance to the tool clamping mechanism. The adjustment mechanism is one or a combination of multi-angle adjustment and stepless adjustment to adjust the first tilt angle of the sharpening mechanism and maintain a fixed position after adjustment. When the fixed-angle sharpener is sharpening, the sharpening mechanism can rotate relative to the adjustment base to perform the sharpening action.

[0005] The multi-angle adjustment here includes single, two, or more angle adjustments. This can be achieved through substitution or adjustment, with adjustments made via jacks, etc. Stepless adjustment can be achieved through rotation.

[0006] Optionally, the polishing mechanism includes a polishing rod and a polishing assembly, the polishing assembly being movably mounted on the polishing rod. The polishing assembly includes an abrasive tool, which can be a grinding stone or sandpaper, etc., and is generally located on the side of the polishing rod. The polishing assembly can be an integral or replaceable abrasive tool. During polishing, the polishing assembly can move along the direction of the polishing rod to achieve the polishing action. Further optionally, the polishing assembly can rotate around the polishing rod. Optionally, there can be one or two abrasive tools, respectively located on opposite sides of the polishing rod.

[0007] Optionally, the polishing mechanism further includes a first rotating shaft, which is connected to a polishing rod. Optionally, the first rotating shaft is perpendicular to the polishing rod.

[0008] Optionally, the sum of the angle between the plane in which the grinding mechanism rotates relative to the adjusting base and the straight line in which the adjusting base moves, and the first tilt angle is 90°, or the angle at which the grinding mechanism deviates from the vertical plane of the adjusting base is equal to the first tilt angle, and the vertical plane is perpendicular to the guide support or the base.

[0009] Optionally, the adjustment mechanism further includes one or more angle replacement blocks. When there are multiple angle replacement blocks, the multiple angle replacement blocks with rotating grooves are detachably installed on the adjustment base, the first rotating shaft is rotatable and detachably installed in the rotating groove, and the second inclination angles of the rotating grooves of the multiple angle replacement blocks are all different or partially different. When there is only one angle replacement block, the angle replacement block with rotating groove is detachably or non-detachably installed on the adjustment base, and the first rotating shaft is rotatable and detachably installed in the rotating groove.

[0010] Optionally, the extension direction of the projection of the rotating groove onto the plane of the adjusting base is consistent with the extension direction of the guide support.

[0011] Optionally, the angle replacement block and the adjustment base are provided with interlocking protrusions and grooves that can slide against each other.

[0012] Optionally, the angle replacement block has one or more countersunk holes on the side facing away from the rotating groove for placing magnetic components.

[0013] Optionally, the adjustment mechanism also includes an angle block rotation shaft and an angle positioning pin. One end of one or more angle replacement blocks is rotatably mounted around the angle block rotation shaft. One or more angle replacement blocks and the side wall of the adjustment base are respectively provided with one or more mutually cooperating first mounting holes and second mounting holes for installing angle positioning pins. When the angle positioning pin is inserted into different second mounting holes, the second tilt angle is different.

[0014] Optionally, multiple first mounting holes are arranged along an arc shape, and second mounting holes are arranged along a straight line.

[0015] Optionally, the adjustment mechanism also includes a stepless adjustment shaft. The side wall of the adjustment base is provided with an oblong hole. The stepless adjustment shaft is located in the oblong hole and abuts against the bottom of one or more angle replacement blocks. When the stepless adjustment shaft is located in different positions in the oblong hole, the second tilt angle is different.

[0016] Optionally, the adjustment mechanism also includes an adjusting element, such as a screw or bolt, connected to the continuously variable adjustment shaft. The position of the continuously variable adjustment shaft within the oblong hole is adjusted by adjusting the adjusting element, for example, by rotation. The adjusting element and the continuously variable adjustment shaft can be separate, integrated, or the end of the adjusting element can be inserted into the continuously variable adjustment shaft, with the position of the shaft changed by rotating the adjusting element.

[0017] Optionally, the adjustment mechanism also includes a clamping screw, and a third mounting hole is provided on the side wall of the adjustment base. After the clamping screw is inserted into the third mounting hole, it abuts against the angle replacement block.

[0018] Optionally, the tool clamping mechanism can be fixed (non-rotating) relative to the guide support, but can still be detachable for tool flipping. Alternatively, the tool held by the tool clamping mechanism can rotate relative to the base, which is particularly suitable for grinding curved tools, such as inward curved tools, allowing for fixed angle grinding even when grinding curved tools, making grinding more flexible.

[0019] Optionally, the guide support can be one or more shafts, and the adjusting mechanism is connected to the shafts via linear bearings. In another embodiment, the guide support can be a slide rail, and the adjusting mechanism is slidably mounted on the slide rail.

[0020] Optionally, the fixed-angle sharpener may also include a base with lugs for supporting the guide support, and the tool clamping mechanism is mounted on the base.

[0021] Any of the guide support, adjustment mechanism, tool clamping mechanism, and grinding mechanism mentioned above in this disclosure can be used in conjunction with each other. For example, any multi-angle adjustment mechanism can be used with a fixed tool clamping mechanism or a rotatable tool clamping mechanism. Any multi-angle adjustment mechanism can be used with a guide support for the shaft or a guide support for the slide rail, and so on.

[0022] The beneficial effects of this disclosure are that, by setting a guide support, the adjustment mechanism can move on the guide support to adjust the distance between itself and the tool clamping mechanism. Thus, during the grinding process, the distance between the grinding mechanism and the tool can be flexibly adjusted at any time. At the same time, the adjustment mechanism can rotate, and the adjustment process is smooth, which is conducive to maintaining a fixed grinding angle α and to the grinding work, achieving a more flexible grinding effect. Furthermore, this solution also provides several structures that can adjust the angle of the grinding mechanism, all of which can achieve a relatively precise angle adjustment effect, further ensuring the grinding effect. In particular, it can conveniently set the grinding angle and always maintain the same angle.

[0023] Traditional sharpening tools, which adjust the angle by changing the pivot point of the sharpening rod and the distance between the contact point between the rod and the blade, require resetting the angle if a different thickness of the grinding wheel is used. For example, a 1mm thick grinding wheel might be set to 20° for sharpening, but if a thicker grinding wheel is used, the angle will become smaller than 20° because the pivot point hasn't been adjusted. Therefore, they need to be used with a digital protractor, and the angle needs to be readjusted during sharpening. However, the α angle in this application remains consistent throughout.

[0024] Furthermore, the multi-angle adjustment methods in this application do not require the use of a protractor. Attached Figure Description

[0025] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 is a schematic diagram of the overall structure of the fixed-angle grinder in this embodiment;

[0027] Figure 2 is a schematic diagram of the fixed-angle grinder in Figure 1 from another direction;

[0028] Figure 3 is a schematic diagram of another type of fixed-angle sharpener;

[0029] Figure 4 is a schematic diagram of a fixed-angle grinder with a slide rail structure;

[0030] Figure 5 is a schematic diagram of the structure during multi-angle adjustment.

[0031] Figure 6 is a schematic diagram of the structure during stepless adjustment of the adjustment structure;

[0032] Figure 7 is a schematic diagram of the fit between the angle block rotation axis, the angle positioning pin, and the angle replacement block;

[0033] Figure 8 is a schematic diagram of the fit between the adjusting base and the stepless adjusting shaft;

[0034] Figure 9 is a schematic diagram of the fit between the adjusting base, the stepless adjusting shaft, and the adjusting components;

[0035] Figure 10 is another schematic diagram of the cooperation between the grinding rod and the adjustment mechanism;

[0036] Figure 11 is a schematic diagram of the multi-angle position adjustment mechanism;

[0037] Figure 12 is a schematic diagram of the angle replacement block;

[0038] Figure 13 is a schematic diagram of the back side of Figure 12;

[0039] Figure 14 is a schematic diagram of the adjustment base in Figure 11;

[0040] Figure 15 is a cross-sectional view of the tool clamping mechanism;

[0041] Figure 16 is another cross-sectional view of the tool clamping mechanism;

[0042] Figure 17 is a schematic diagram of the different states of the curved blade during the grinding process;

[0043] Figure 18 is a cross-sectional view of the cutting tool;

[0044] Figure 19 is a schematic diagram of the first tilt angle. Detailed Implementation

[0045] The following description is intended only to disclose this disclosure so that those skilled in the art can implement it. The embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of this disclosure defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of this disclosure.

[0046] A fixed-angle sharpener 100, as shown in Figures 1 to 4, includes a base 1, a guide support 3, an adjustment mechanism 4, a tool clamping mechanism 5, and a sharpening mechanism 6. The tool clamping mechanism 5 is used to clamp the tool 7 to be sharpened so that it can be sharpened in conjunction with the grinding stone of the sharpening mechanism. The guide support 3 and the adjustment mechanism 4 cooperate with each other to achieve fixed-angle sharpening.

[0047] The sharpener in this design can be used horizontally or vertically, and there are no restrictions on its posture.

[0048] The fixed angle of a fixed-angle grinder refers to the fact that once the first tilt angle is adjusted by adjusting the second tilt angle, the first tilt angle can remain unchanged. During the grinding process, the adjustment mechanism is moved and rotated, but the movement and rotation of the adjustment mechanism will not affect the first tilt angle, thus achieving a fixed angle. The first tilt angle here can be equal to or close to α mentioned later, which is the angle at which the grinding mechanism deviates from the vertical.

[0049] The second tilt angle can be the same as the first tilt angle, or the sum of the first tilt angle and the second tilt angle can be 90°.

[0050] The base 1 is provided with ear plates 2 for supporting the guide support body 3. The extension direction of the guide support body 3 can be parallel or approximately parallel to the extension direction of the base. The base 1 is generally installed on the working surface, that is, the extension direction of the guide support body 3 is generally parallel to the working surface. There can be one ear plate 2, or two or more ear plates 2.

[0051] The blade clamping mechanism 5 is mounted on the base 1. The adjusting mechanism 4 is movably or slidably mounted on the guide support 3, or the adjusting mechanism 4 moves with the guide support 3 to adjust the distance between the blade clamping mechanism and the blade clamping mechanism. One end of the grinding mechanism 6 is rotatably mounted on the adjusting mechanism 4 to realize the back-and-forth grinding action. The adjusting mechanism 4 is one or a combination of multi-angle position adjustment and stepless adjustment to adjust the first tilt angle of the grinding mechanism 6 and can be fixed after adjustment, thereby realizing fixed-angle grinding.

[0052] Optionally, the guide support 3 can be a shaft, which can be a round shaft, a two-sided milled cylinder, a one-sided milled cylinder, a prism, etc. A two-sided milled cylinder has a parallel plane cut on each of its opposite sides, resulting in an overall cross-section resembling a "racetrack." A one-sided milled cylinder only has a parallel plane cut on one side. There can be one guide support or two; in this embodiment, they are two parallel shafts.

[0053] The bottom of the adjusting base 46 has a sliding hole, and the shaft passes through the sliding hole (no bearing is provided here). The guide support 3 is installed on the ear plate 2 through the sliding bearing. The guide support 3 passes through the ear plate. The guide support 3 is relatively long, and the movement or sliding effect is achieved by sliding the shaft.

[0054] In another embodiment, as shown in Figure 4, the guide support 3 can also be configured as a slide rail 49, and the bottom of the adjusting base 46 can be provided with a slider 48 to cooperate with it, which is slidably mounted on the slide rail to achieve sliding.

[0055] In another embodiment, as shown in Figure 3, the bottom of the adjusting base 46 has a sliding hole, within which a linear bearing is installed. The linear bearing 47 connects to a guide support 3, which serves as the shaft. The adjusting mechanism 4 can slide on the guide support 3 via the linear bearing 47. Compared to the structures in Figures 1 and 2, the guide support 3 is relatively shorter in this embodiment.

[0056] In addition to the structures mentioned above, any structure available on the market can be used to achieve sliding or movement.

[0057] In Figures 1 to 4, one set of adjustment mechanism 4 is provided, located on one side of the tool clamping mechanism 5. In this case, the tool clamping mechanism can be configured to be detachable or rotatable, allowing for double-sided sharpening. Alternatively, two sets of adjustment mechanism 4 can be provided to simultaneously process both sides of the tool.

[0058] The adjustment mechanism 4 can move or slide along the guide support 3 to adjust the distance between itself and the tool clamping mechanism 5. Through these movements, the angle of each part of the tool blade can be ground in a consistent manner, resulting in a more flexible grinding effect. One end of the grinding mechanism 6 is mounted on the adjustment mechanism 4. The adjustment mechanism is used to flexibly adjust the grinding angle and position of the grinding mechanism 6 during the grinding process.

[0059] The polishing mechanism 6 includes a polishing rod 61 and a polishing assembly. The polishing assembly includes a grinding stone, which is generally located on the side of the polishing rod. The polishing assembly can be an integral or replaceable grinding stone; in this embodiment, a replaceable grinding stone is used. The polishing mechanism can also adopt an existing structure on the market, as long as it includes a polishing rod for connecting to the adjustment mechanism 4.

[0060] The polishing assembly is fixedly or movably mounted on the polishing rod 61. In the embodiments shown in Figures 1 to 4, a movable mounting method is used. The polishing assembly includes a first polishing stone holder 62 and one or two polishing stones. The polishing stones are magnetically attracted to the first polishing stone holder. If there are two polishing stones, they are respectively secured to opposite sides of the first polishing stone holder. The first polishing stone holder 62 is fitted onto the polishing rod 61, allowing for sliding and rotational adjustment. During polishing, the polishing assembly can move along the direction of the polishing rod and can also be configured to rotate around the polishing rod to achieve the polishing action.

[0061] The two grinding stones can be a flat grinding stone 631 and a curved grinding stone 632, respectively. The curved stone can be convex, and the curved grinding stone can more easily grind curved knives such as inward-curved knives. Alternatively, a narrower flat grinding stone can also be used.

[0062] The polishing mechanism also includes a first rotating shaft 64, which is connected to the polishing rod. Optionally, the first rotating shaft is perpendicular to the polishing rod.

[0063] The angle between the plane in which the grinding mechanism rotates relative to the adjusting base and the straight line in which the adjusting base moves is equal to the first tilt angle.

[0064] The grinding stones mentioned above can also be replaced with sandpaper, etc.

[0065] The tool clamping mechanism 5 can adopt a commonly used structure on the market, or it can adopt the structure shown in Figures 1 to 4. The tool clamping mechanism can rotate in the first direction. The plane in which the tool clamping mechanism 5 rotates is perpendicular to the plane in which the base is located, which is particularly suitable for grinding curved tools (Figure 17). Even when grinding curved tools, it can achieve a true grinding fixed angle β (Figure 18), making the grinding more flexible. Figure 18 shows a cross-sectional view of the tool 7. If only the grinding bar is rotated, it is a bit inconvenient to operate where the curvature of the tool changes drastically (such as at both ends of the curved tool, at the tool clamp, and near the tool shank). However, if the grinding bar and the tool clamping mechanism can rotate simultaneously, it is much more convenient. Figure 17 shows a schematic diagram of different states of simultaneous rotation of the grinding bar and the tool.

[0066] In other embodiments, the tool clamping mechanism 5 is fixed (non-rotating) relative to the guide support 3, but it can still be set to be detachable. Disassembly can facilitate clamping the tool and then installing it, and can also facilitate removing the tool for inspection during grinding.

[0067] Furthermore, unlike Figures 1 and 2, as shown in Figures 3 and 4, in order to facilitate flipping, in the case of a single-sided grinding structure, the tool clamping mechanism can be set to be either detachable or rotatable, thereby achieving double-sided grinding. The rotation here is for the convenience of flipping the tool and is a rotation in the second direction, which is parallel to the plane where the base is located.

[0068] At this time, the tool clamping mechanism 5 may include a tool clamping base 51, a support rod 52, and a tool clamping assembly 53. Figures 15 and 16 are two cross-sectional views of the tool clamping mechanism in Figure 3 along the axial section of the support rod 52. The two sections are parallel to each other. The tool clamping base 51 is divided into an upper tool clamping base 511 and a lower tool clamping base 512 mounted on the base. The upper and lower tool clamping bases are internally connected by a shaft 513. A spring 514 is sleeved on the shaft. A rotating rod 515 is inserted into the bottom end of the shaft 513. One or more balls or rollers 54 are provided between the contact surfaces of the upper and lower tool clamping bases. In order to cooperate with the balls and rollers, grooves are provided at corresponding positions of the upper and lower tool clamping bases. A spring 55 is provided on one side of the ball or roller. During the rotation, the ball or roller is pressed down. After the rotation is completed, the spring pushes the ball or roller out and locks it into place, so that the upper tool clamping base can rotate relative to the lower tool clamping base to achieve the flipping of the tool.

[0069] In addition to the tool clamping mechanism shown in Figures 15-16, other rotatable tool clamping mechanisms can also be used.

[0070] The tool holder assembly 53 may include a tool holder base 531 with a groove and at least one jaw 532 for holding a tool, the jaw being slidable and fixed in the groove. The rotation axis 533 may be located at the middle position of the slide rail of the tool holder assembly, and the tool holder base may rotate about the rotation axis to adjust the angle of the tool, the rotation here being the rotation in the first direction mentioned above.

[0071] Optionally, the adjustment mechanism is a stepless angle adjustment or a multi-angle position adjustment (non-stepless adjustment), or a combination of the two. The stepless angle adjustment has more adjustable angles, while the multi-angle position adjustment can quickly locate the angle.

[0072] One type of multi-angle position adjustment is shown in Figures 11 to 14, and it can be a replacement type.

[0073] The adjustment mechanism includes an adjustment base 46 and multiple angle replacement blocks 41. Each angle replacement block has a rotation groove 411 for mounting a first rotating shaft. The multiple angle replacement blocks are detachably mounted on the adjustment base. The first rotating shaft is rotatable and detachably mounted within the rotation groove. The second inclination angle γ of the rotation grooves of the multiple angle replacement blocks are all different, although in other embodiments they may be partially different. As an extreme example, the adjustment mechanism may also include an adjustment base and only one angle replacement block. The adjustment base 46 has a platform 43 for mounting the replacement blocks, and the platform 43 has sidewalls on both sides.

[0074] Optionally, the extension direction of the projection of the rotating groove onto the plane of the adjusting base or the plane of the base 1 is consistent with the extension direction of the guide support. For example, if the guide support extends left and right, the extension direction of the projection of the rotating groove onto the plane of the adjusting base is also left and right. The extension direction of the rotating groove and the extension direction of the guide support are not parallel, but have an angle, which can be determined by the second tilt angle γ. Optionally, the angle replacement block and the adjusting base are provided with mutually cooperating and mutually sliding protrusions and grooves to achieve sliding replacement. The mutually sliding protrusions and grooves can be set in two sets, respectively provided on two side walls. Fasteners such as bolts and screws can also be provided on the side walls to fix the angle replacement block and the adjusting base. Alternatively, mutually cooperating and mutually sliding protrusions and grooves can be omitted, and the fasteners can be locked after direct insertion.

[0075] Optionally, the angle replacement block has one or more countersunk holes 42 on the side facing away from the rotating groove for placing a magnetic component. The magnetic component can increase the firmness of the connection of the first rotating shaft within the rotating groove. The magnetic component is positioned close to the rotating groove. The magnetic component can be a magnet or the like.

[0076] Based on the above multi-angle position adjustment, the multi-angle position adjustment can also be combined with stepless adjustment, as shown in Figures 1 to 9.

[0077] In addition to the structure mentioned above, the adjustment mechanism also includes an angle block rotating shaft 441 and an angle positioning pin 442. One end of the angle replacement block is rotatably mounted around the angle block rotating shaft. The side walls of the angle replacement block and the adjustment base are respectively provided with a first mounting hole 412 and a second mounting hole 462 for installing the angle positioning pin. When the angle positioning pin is inserted into different second mounting holes, the second tilt angle is different.

[0078] Optionally, the side wall of the adjusting base is also provided with a rotating hole 464 for the angle block rotating shaft 441 to mate with. The size of the rotating hole 464 can be slightly larger than the second mounting hole 462.

[0079] Optionally, the multiple first mounting holes are arranged along an arc, and the second mounting holes are arranged along a straight line. The rotating hole does not have to be on the same horizontal line as the second mounting hole 462; the position of the rotating hole can be lower than the second mounting hole 462, or closer to the base 1.

[0080] Optionally, the adjustment mechanism also includes a stepless adjustment shaft 451. The side wall of the adjustment base is provided with a waist-shaped hole 461, or it can be an elongated hole of other shapes. The waist-shaped hole 461 can be located on the side of the second mounting hole near the adjustment base. The stepless adjustment shaft is located in the waist-shaped hole and abuts against the bottom of one or more angle replacement blocks. When the stepless adjustment shaft is located in different positions in the waist-shaped hole, the second tilt angle is different.

[0081] Optionally, the adjustment mechanism also includes a screw 452 connected to the infinitely adjustable shaft. The position of the infinitely adjustable shaft within the oblong hole is controlled by adjusting the screw, thereby adjusting the second tilt angle. The extension direction of the screw can be consistent with the extension direction of the guide support.

[0082] Optionally, the adjustment mechanism also includes a clamping screw, and a third mounting hole 463 is provided on the side wall of the adjustment base. After the clamping screw is inserted into the third mounting hole, it abuts against the angle replacement block. The third mounting hole can be located on the side of the second mounting hole away from the adjustment base.

[0083] Optionally, the angle replacement block has one or more countersunk holes 42 on the side facing away from the rotating groove for placing a magnetic component, which can make the connection of the first rotating shaft in the rotating groove more secure.

[0084] At this point, multi-angle adjustment can be performed using the method shown in Figure 5, mainly through the insertion hole, which causes the angle replacement block to rotate around the angle block rotation axis 441, thereby changing the tilt angle. Stepless adjustment can be performed using the method shown in Figure 6, by rotating the screw to control the position of the stepless adjustment shaft within the oblong hole, thus adjusting the second tilt angle. In addition to multi-angle adjustment, stepless adjustment can also be used.

[0085] In another alternative solution, if the machining accuracy is sufficient, the clamping screw 453 can be omitted.

[0086] The first tilt angle α is between 8° and 35°. There are 6 preset tilt angles, such as 15°, 17°, 18°, 20°, 25°, and 30°.

[0087] Further optionally, as shown in Figure 10, a fixing member 454 can be provided on the rotating groove to fix the first rotating shaft. This fixing member is detachably connected via threaded components such as screws. The first rotating shaft is rotatably disposed within the space enclosed by the fixing member and the rotating groove. This structure eliminates the need for additional magnetic components. Further optionally, a sleeve or bearing 455 is fitted over the first rotating shaft 64, located within the space enclosed by the fixing member and the rotating groove.

[0088] As described above, the multi-angle adjustment, stepless adjustment, or combination of these adjustments can be used to adjust the first tilt angle before grinding. During the grinding process, one end of the grinding rod moves with the sliding or moving adjustment mechanism, thereby adjusting the distance between one end of the grinding rod and the tool clamping mechanism. At the same time, by rotating, the contact position between the grinding stone and the tool can be adjusted, and this can be flexibly adjusted to achieve a fixed angle.

[0089] Small angles, such as 10°, are suitable for extremely sharp blades, such as razor blades. Common angles, such as 20°, are suitable for most kitchen knives and outdoor knives; large angles, such as 30°, are suitable for knives that need to maintain durability, such as machetes.

[0090] Those skilled in the art should understand that the embodiments of this disclosure described above and shown in the accompanying drawings are merely examples and do not limit the scope of this disclosure. The purpose of this disclosure has been fully and effectively achieved. The functional and structural principles of this disclosure have been demonstrated and illustrated in the embodiments, and any variations and modifications may be made to the implementation of this disclosure without departing from the stated principles.

Claims

1. A fixed-angle tool sharpener, characterized in that: The device includes a guide support, an adjustment mechanism, a tool clamping mechanism, and a grinding mechanism. The adjustment mechanism can be provided in two or one sets, with the two sets respectively located on both sides of the tool clamping mechanism, or one set of adjustment mechanisms located on one side of the tool clamping mechanism. Each adjustment mechanism includes an adjustment base mounted on the guide support, and the grinding mechanism is mounted on the adjustment mechanism. When the fixed-angle grinder is grinding, the adjusting base can move along the guide support or move with the guide support to adjust the distance between itself and the tool clamping mechanism. The adjustment mechanism is one or a combination of multi-angle position adjustment and stepless adjustment to adjust the first tilt angle of the grinding mechanism and keep it fixed after adjustment; when the fixed angle grinder is grinding, the grinding mechanism can rotate relative to the adjustment base to realize the grinding action.

2. The fixed-angle sharpener according to claim 1, characterized in that: The polishing mechanism includes a polishing rod, a first rotating shaft, and a polishing assembly. The polishing assembly is movably mounted on the polishing rod, and the first rotating shaft is connected to the polishing rod.

3. The fixed-angle grinder according to claim 2, characterized in that: The first rotating axis is perpendicular to the grinding rod.

4. The fixed-angle sharpener according to claim 2 or 3, characterized in that: The angle at which the grinding mechanism deviates from the vertical plane of the adjusting base is equal to the first tilt angle, and the vertical plane is perpendicular to the guide support.

5. The fixed-angle sharpener according to claim 3, characterized in that: The adjustment mechanism further includes one or more angle replacement blocks. When there are multiple angle replacement blocks, the multiple angle replacement blocks with rotating grooves are detachably installed on the adjustment base. The first rotating shaft is rotatable and detachably installed in the rotating groove. The second inclination angles of the rotating grooves of the multiple angle replacement blocks are all different or partially different. When there is only one angle replacement block, the one angle replacement block with rotating groove is detachably or non-detachably installed on the adjustment base. The first rotating shaft is rotatable and detachably installed in the rotating groove.

6. The fixed-angle sharpener according to claim 5, characterized in that: The projection of the rotating groove onto the plane of the adjusting base extends in the same direction as the extension direction of the guide support.

7. The fixed-angle sharpener according to claim 6, characterized in that: The angle replacement block and the adjustment base are provided with mutually cooperating protrusions and grooves that can slide against each other.

8. The fixed-angle sharpener according to claim 6, characterized in that: The adjustment mechanism also includes an angle block rotation shaft and an angle positioning pin. One end of the one or more angle replacement blocks is rotatably arranged around the angle block rotation shaft. The one or more angle replacement blocks and the side wall of the adjustment base are respectively provided with one or more mutually cooperating first mounting holes and second mounting holes for installing the angle positioning pin. When the angle positioning pin is inserted into different second mounting holes, the second tilt angle is different.

9. The fixed-angle sharpener according to claim 7 or 8, characterized in that: The angle replacement block has one or more countersunk holes on the side facing away from the rotating groove for placing magnetic components.

10. The fixed-angle sharpener according to claim 8, characterized in that: Multiple first mounting holes are arranged along an arc, and second mounting holes are arranged along a straight line.

11. The fixed-angle sharpener according to claim 8, characterized in that: The adjustment mechanism also includes a stepless adjustment shaft. The side wall of the adjustment base is provided with a waist-shaped hole. The stepless adjustment shaft is located in the waist-shaped hole and abuts against the bottom of one or more angle replacement blocks. When the stepless adjustment shaft is located in different positions in the waist-shaped hole, the second tilt angle is different.

12. The fixed-angle sharpener according to claim 11, characterized in that: The adjustment mechanism also includes an adjustment component connected to the stepless adjustment shaft.

13. The fixed-angle grinder according to claim 12, characterized in that: The adjustment mechanism also includes a clamping screw, and a third mounting hole is provided on the side wall of the adjustment base. After the clamping screw is inserted into the third mounting hole, it abuts against the angle replacement block.

14. The fixed-angle sharpener according to any one of claims 5-13, characterized in that: The guide support is one or more shafts, and the adjustment mechanism is connected to the shafts via linear bearings, thereby enabling the adjustment base to move along the guide support.

15. The fixed-angle grinder according to any one of claims 5-13, characterized in that: The guide support is a slide rail, and the adjustment base is slidably mounted on the slide rail.

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