Handheld grinding device and knife sharpening equipment

Abstract

The utility model discloses a handheld grinding device and knife sharpening equipment. The handheld grinding device comprises a mounting main body; the sharpening seat is rotationally connected to the mounting main body through a rotating shaft; the at least two knife sharpening pieces are distributed on the periphery of the knife sharpening seat around the circumference of the rotating shaft, and the surface roughness of at least two knife sharpening pieces is different; the angle positioning mechanism is arranged between the mounting main body and the knife sharpening seat and is used for limiting the angle position of the knife sharpening seat on the mounting main body, so that the corresponding knife sharpening piece faces a preset direction; the knife sharpening equipment comprises a support, a clamping assembly and a movable swing rod located above the clamping assembly are arranged on the support, one end of the movable swing rod is rotationally connected to the support through a ball pair, and a handheld grinding device is embedded in the movable swing rod in a sliding mode. According to the handheld grinding device and the grinding equipment, at least two grinding pieces with different surface roughness are integrated, grinding work with different precision requirements can be completed at a time without replacing the handheld grinding device, and the grinding pieces with different grinding precision can be conveniently switched to improve the grinding efficiency.

Description

Technical Field

[0001] The utility model relates to a handheld grinding device and knife sharpening equipment. Background Art

[0002] Knives are common cooking utensils used in daily life to prepare food. The blade, a crucial component of a knife, becomes blunt after a period of use, affecting its cutting effectiveness. Therefore, after a period of use, the knife's blade is sharpened using a sharpener. Knives that require extensive grinding require multiple grinding cycles with varying degrees of precision, such as coarse and fine grinding. However, conventional sharpeners are unable to provide grinding surfaces with varying degrees of precision, necessitating the use of multiple sharpeners of varying specifications. This increases costs and reduces grinding efficiency.

[0003] In addition, the existing knife sharpener is stationary on the table. The user holds the knife so that the blade is aligned with the sharpening part of the knife sharpener within a certain angle range and pushes and pulls back and forth relative to the sharpening part so that the sharpening part of the knife sharpens the blade of the knife. However, since the knife is held by the user, the angle between the blade and the sharpening part of the knife sharpener is easily changed by the user pushing and pulling the knife. In addition, the user's hand will shake back and forth during the sharpening process, causing the blade to be easily irregularly deformed due to uneven force and changes in the grinding angle, resulting in poor sharpness of the blade after grinding. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a handheld grinding device that can switch between different grinding precisions to improve grinding efficiency; a second object is to provide a knife sharpening device having the handheld grinding device.

[0005] According to an embodiment of the first aspect of the present invention, a handheld grinding device includes: a mounting body; a grinding seat rotatably connected to the mounting body via a rotating shaft; at least two grinding members distributed on the outer periphery of the grinding seat around the circumference of the rotating shaft, at least two of the grinding members having different surface roughnesses; and an angle positioning mechanism provided between the mounting body and the grinding seat, for limiting the angular position of the grinding seat on the mounting body so that the corresponding grinding member faces a preset direction.

[0006] A handheld grinding device according to an embodiment of the present invention has at least the following beneficial effects:

[0007] The handheld grinding device with the above structure uses an angle positioning mechanism to fix a certain grinding member in a preset direction to grind the tool. When it is necessary to switch the grinding accuracy, the grinding seat is rotated around the rotation axis relative to the mounting body until the other grinding member faces the preset direction, and then the angle position of the grinding seat is fixed by the angle positioning mechanism. The handheld grinding device is integrated with at least two grinding members with different surface roughnesses, which facilitates switching between grinding members with different grinding accuracy to improve grinding efficiency.

[0008] In some embodiments of the present invention, the mounting body includes a handle and two connecting seats oppositely arranged at both ends of the handle, the sharpening seat is located between the two connecting seats and extends along the length direction of the handle, and the rotating shaft is arranged between the two ends of the sharpening seat and the corresponding connecting seats.

[0009] In some embodiments of the present invention, the sharpening seat is in the shape of a triangular prism, and the outer surface of the sharpening seat has three mounting positions, each of the mounting positions is equipped with a sharpening member, and the surface roughness of the three sharpening members decreases in sequence in a clockwise or counterclockwise direction.

[0010] In some embodiments of the present invention, the knife sharpening seat includes two long side panels and two end panels, a side edge of the two long side panels in the length direction coincides, the adjacent ends of the two long side panels are connected by one end panel, an open receiving groove is defined between the two long side panels and the two end panels, a long mounting plate is installed at the open part of the receiving groove, the knife sharpening seat and the long mounting plate are made of plastic, and the outer surface of the long mounting plate and the outer surfaces of the two long side panels are both formed with a mounting position.

[0011] In some embodiments of the present invention, a plurality of first support ribs supported between the inner walls of the two long side panels are formed inside the accommodating groove, and the plurality of first support ribs are arranged at intervals along the length direction of the long side panels. A support frame that is tightly matched with the inner peripheral edge of the opening is provided on the side of the long mounting plate facing away from the mounting position.

[0012] In some embodiments of the present invention, the angle positioning mechanism includes a plurality of positioning grooves distributed around the circumference of the rotating shaft and corresponding one-to-one to the sharpening members, and a positioning protrusion that can elastically enter and exit any of the positioning grooves. One of the positioning groove and the positioning protrusion is provided on the mounting body, and the other is provided on the sharpening seat.

[0013] In some embodiments of the present invention, the positioning groove is a spherical concave portion, the positioning protrusion is a spherical bead, and the spherical bead contacts a spring member that drives it to extend toward the spherical concave portion.

[0014] In some embodiments of the present invention, the rotating shaft is protruded at both ends of the sharpening seat, the handle and the two connecting seats are an integral plastic structure, and the two connecting seats are respectively provided with a rotating guide portion for rotating the adjacent rotating shaft, and the rotating guide portion abuts against the end of the rotating shaft to prevent the sharpening seat from moving relative to the mounting body along the axial direction of the rotating shaft.

[0015] In some embodiments of the present invention, an axial hole channel is provided through the knife grinding seat and the mounting body along the axial direction of the rotating shaft.

[0016] According to a second embodiment of the present invention, a knife sharpening device comprises a support, the support being provided with a clamping assembly and a movable rocker positioned above the clamping assembly, one end of the movable rocker being rotatably connected to the support via a ball pair, and a handheld grinding device according to any of the above technical solutions being slidably nested within the movable rocker. The knife sharpening device is integrated with at least two sharpening elements having different surface roughnesses, facilitating switching between sharpening elements of varying grinding precisions to improve grinding efficiency.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the handheld grinding device of the present utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structural decomposition of an embodiment;

[0021] Figure 3 A cross-sectional schematic diagram of an embodiment of the handheld grinding device of the present utility model

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the knife sharpening stand according to an embodiment;

[0023] Figure 5 This is a structural schematic diagram of an embodiment of the knife sharpening device of the present utility model.

[0024] Reference numerals:

[0025] Mounting body 100; handle 110; connecting seat 120; rotating guide portion 121; sharpening seat 200; elongated side panel 210; end panel 220; accommodating groove 230; elongated mounting plate 240; supporting frame 241; first supporting rib 250; rotating shaft 300; sharpening member 400; angle positioning mechanism 500; positioning groove 510; positioning protrusion 520; spring member 530; support 600; clamping assembly 700; movable rocker arm 800; shaft hole channel 900. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside", are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0029] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] See also Figures 1 to 4The present invention provides a handheld grinding device, comprising: a mounting body 100; a knife sharpening seat 200, rotatably connected to the mounting body 100 via a rotating shaft 300; at least two knife sharpening members 400, distributed around the circumference of the rotating shaft 300 on the outer periphery of the knife sharpening seat 200, wherein at least two of the knife sharpening members 400 have different surface roughness; and an angle positioning mechanism 500, disposed between the mounting body 100 and the knife sharpening seat 200, for limiting the angle position of the knife sharpening seat 200 on the mounting body 100 so that the corresponding knife sharpening member 400 faces a preset direction.

[0031] The handheld grinding device of the above structure uses an angle positioning mechanism 500 to fix one of the grinding elements 400 in a preset direction for grinding a tool. When it is necessary to switch the grinding precision, the grinding seat 200 is rotated relative to the mounting body 100 about the rotation axis 300 until the other grinding element 400 faces the preset direction, and the angle position of the grinding seat 200 is then fixed by the angle positioning mechanism 500. The handheld grinding device is integrated with at least two grinding elements 400 with different surface roughnesses. Grinding tasks with different precision requirements can be completed at one time without replacing the handheld grinding device. This facilitates switching between grinding elements 400 with different grinding precisions to improve grinding efficiency and reduce manufacturing costs.

[0032] See also Figures 1 to 3 In some embodiments of the present invention, the mounting body 100 includes a handle 110 and two connecting seats 120 oppositely disposed at either end of the handle 110. The sharpening seat 200 is located between the two connecting seats 120 and extends along the length of the handle 110. The rotating shaft 300 is disposed between the ends of the sharpening seat 200 and the corresponding connecting seats 120. A sharpening member 400 is also disposed along the length of the sharpening seat 200. The sharpening member 400 is a long, flat plate. The handle 110 is flat. The grinding surface of the sharpening member 400, when positioned in a predetermined direction, is perpendicular to the handle 110. The rotating shaft 300 and the angle positioning mechanism 500 are both disposed between the ends of the sharpening seat 200 and the corresponding connecting seats 120. When a user grips the handle 110, the user can move the rotating shaft 300 axially to maintain equal interference contact between the grinding surface of the sharpening member 400 and the cutting edge of the knife. This structural design is very compact and convenient to use.

[0033] See also Figure 1 and Figure 2In some embodiments of the present invention, the sharpening seat 200 is triangular prism-shaped, with three mounting locations on its outer surface. Each mounting location is equipped with a sharpening element 400, and the surface roughness of the three sharpening elements 400 decreases in a clockwise or counterclockwise direction. In this embodiment, the three sharpening elements 400 correspond to the three processes of rough grinding, semi-finishing grinding, and fine grinding, respectively. Accordingly, the surface roughness of the grinding surfaces of the three sharpening elements 400 decreases in a clockwise direction. The sharpening element 400 with the greatest surface roughness is used for rough grinding of the tool edge, and the sharpening element 400 with the least surface roughness is used for fine grinding of the tool edge. Taking the example of the grinding surfaces of the three grinding elements 400 decreasing in surface roughness in a clockwise direction, in actual use, after rough grinding is completed, the grinding stand 200 is rotated 60° counterclockwise relative to the mounting body 100 using the angle positioning mechanism 500 and then fixed. The grinding element 400 with a moderate surface roughness is now oriented in a predetermined direction for contacting the cutting edge of the tool, thereby achieving semi-finishing grinding. The grinding stand 200 is then rotated another 60° counterclockwise relative to the mounting body 100 using the angle positioning mechanism 500 and then fixed. The grinding element 400 with the lowest surface roughness is now oriented in a predetermined direction for contacting the cutting edge of the tool, thereby achieving fine grinding. When switching between grinding elements 400 with different grinding accuracies, adjustments can be made sequentially, and switching can be achieved with a relatively small rotation angle, making operation convenient and error-prone.

[0034] See also Figures 2 to 4In some embodiments of the present invention, the knife sharpening seat 200 includes two long side panels 210 and two end panels 220, and a side edge of the two long side panels 210 in the length direction coincides, and the adjacent ends of the two long side panels 210 are connected by one end panel 220. An open receiving groove 230 is defined between the two long side panels 210 and the two end panels 220, and a long mounting plate 240 is installed at the open part of the receiving groove 230. The knife sharpening seat 200 and the long mounting plate 240 are made of plastic, and the outer surface of the long mounting plate 240 and the outer surface of the two long side panels 210 are both formed with a mounting position. It should be noted that, to reduce costs, the knife sharpening stand 200 is generally injection molded. However, if the knife sharpening stand 200 is directly injection molded into a triangular prism, injection shrinkage and other issues may occur, resulting in the knife sharpening stand 200 failing to meet the required dimensional accuracy and quality. The knife sharpening stand 200 of the above structure is formed into two parts through injection molding, one of which is composed of two elongated side panels 210 and two end panels 220, and the other is the elongated mounting plate 240. The two parts are then assembled together, thereby avoiding injection shrinkage and other issues and ensuring the dimensional accuracy and quality of the knife sharpening stand 200. In this embodiment, the mounting position is a cavity formed on the outer surfaces of the elongated side panels 210 and the elongated mounting plate 240. This cavity is used to accommodate the sharpening member 400. The sharpening member 400 is fixed to the cavity by adhesive bonding, and the contour of the cavity can prevent the sharpening member 400 from moving.

[0035] See also Figure 4 In some embodiments of the present invention, to prevent the elongated side panels 210 from bending along their length and thus affecting the positioning accuracy of the sharpening member 400, and to enhance the mechanical strength of the sharpening stand 200, the interior of the accommodating groove 230 is formed with a plurality of first support ribs 250 supported between the inner walls of the two elongated side panels 210. The plurality of first support ribs 250 are spaced apart along the length of the elongated side panels 210. A support frame 241, which tightly fits the inner circumference of the opening, is provided on the side of the elongated mounting plate 240 facing away from the mounting position. Of course, in other embodiments, the support frame 241 can be loosely fitted with the inner circumference of the opening and then secured by adhesive bonding.

[0036] See also Figure 2 and Figure 3In some embodiments of the present invention, the angular positioning mechanism 500 includes a plurality of positioning grooves 510 distributed around the circumference of the rotating shaft 300 and corresponding one-to-one with the sharpening elements 400, and a positioning protrusion 520 that can elastically move into and out of any of the positioning grooves 510. One of the positioning grooves 510 and the positioning protrusion 520 is provided on the mounting body 100, and the other is provided on the sharpening seat 200. It will be understood that when the positioning protrusion 520 elastically enters one of the positioning grooves 510, the force exerted by the cutting edge of the tool on the sharpening element 400 is substantially parallel to the rotating shaft 300. Therefore, before the sharpening seat 200 is subjected to an external force driving its rotation, the angular position of the sharpening seat 200 relative to the mounting body 100 is stable. When it is necessary to switch to another sharpening element 400 for sharpening the blade of a tool, a certain torque is applied or unlocked to move the positioning protrusion 520 away from the original positioning groove 510. Then, the sharpening seat 200 is rotated until the other positioning groove 510 is aligned with the positioning protrusion 520. The positioning protrusion 520 can elastically enter the other positioning groove 510, thereby achieving the switching of different sharpening elements 400. This angle positioning mechanism 500 has a simple structure and low cost.

[0037] See also Figure 3 In some embodiments of the present invention, the positioning groove 510 is a spherical concave portion, and the positioning protrusion 520 is a spherical bead. The spherical bead contacts a spring member 530 that drives it toward the spherical concave portion. It should be noted that when a large torque is applied to the sharpening seat 200 or the mounting body 100, the spherical bead can compress the spring member 530 and leave the spherical concave portion. When the spherical bead is aligned with another spherical concave portion, the spring member 530 drives the spherical bead to engage with the spherical concave portion. This angle positioning mechanism 500 further simplifies the structure and eliminates the need for an unlocking structure to drive the positioning protrusion 520 out of the positioning groove 510, making it very convenient to use.

[0038] See also Figure 2 and Figure 3 In some embodiments of the present invention, to further simplify the structure, the rotating shaft 300 is protruding from both ends of the knife sharpening seat 200, the handle 110 and the two connecting seats 120 are an integral plastic structure, and the two connecting seats 120 are respectively provided with a rotating guide portion 121 for rotating the adjacent rotating shaft 300. The rotating guide portion 121 abuts against the end of the rotating shaft 300 to prevent the knife sharpening seat 200 from moving relative to the mounting body 100 along the axial direction of the rotating shaft 300. It is understood that when the rotating shaft 300 is solid, the rotating guide portion 121 can be a limiting sleeve, and when the rotating shaft 300 is hollow along the axial direction, the rotating guide portion 121 can be a limiting shaft portion. The rotating guide portion 121 is configured according to actual needs and will not be further described here.

[0039] See also Figure 1 and Figure 3 In some embodiments of the present invention, an axial hole channel 900 is provided through the knife sharpening seat 200 and the mounting body 100 along the axial direction of the rotating shaft 300. It should be noted that the axial hole channel 900 can be movably passed through by a rod. When the handheld grinding device is telescopically moved along the rod, the grinding surface of the knife sharpening member 400 performs linear reciprocating motion, thereby stabilizing the relative angle between the knife sharpening member 400 and the cutting edge of the tool, preventing irregular deformation of the cutting edge due to changes in the grinding angle, and ensuring the sharpness of the blade after grinding.

[0040] See also Figure 5 The present invention also discloses a knife sharpening device, comprising a support 600, a clamping assembly 700 disposed on the support 600, and a movable swing arm 800 located above the clamping assembly 700. One end of the movable swing arm 800 is rotatably connected to the support 600 via a ball pair, and a handheld grinding device according to any of the above technical solutions is slidably embedded in the movable swing arm 800. The knife sharpening device integrates at least two sharpening elements 400 with different surface roughnesses, facilitating switching between sharpening elements 400 with different grinding accuracies to improve grinding efficiency. It is understood that the clamping assembly 700 is used to clamp the tool so that the tool's blade can be maintained in a fixed position during the grinding process, thereby ensuring the grinding effect of the sharpening element 400 on the tool's blade. The movable swing arm 800 can freely rotate relative to the support 600 to a position where the handheld grinding device can adapt to the tool's blade. The handheld grinding device slides back and forth along the length of the swing arm to form a fixed grinding angle between the sharpening element 400 and the tool's blade, and allows the grinding surface of the sharpening element 400 to move along the extension direction of the tool's blade, thereby ensuring the grinding effect of the sharpening element 400 on the tool's blade. In some embodiments, the ball pair is mounted on a slider that can be raised and lowered relative to the support 600. A locking component is provided between the slider and the support 600, thereby expanding the use scenarios of the sharpening device.

[0041] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A handheld grinding device, characterized in that: include: Installing the main body (100); A sharpening seat (200) is rotatably connected to the mounting body (100) via a rotating shaft (300); At least two sharpening members (400) are distributed on the outer periphery of the sharpening seat (200) around the circumference of the rotating shaft (300), and the surface roughness of at least two of the sharpening members (400) is different from each other; An angle positioning mechanism (500) is provided between the mounting body (100) and the knife sharpening seat (200) and is used to limit the angle position of the knife sharpening seat (200) on the mounting body (100) so that the corresponding knife sharpening member (400) faces a preset direction.

2. A handheld grinding device according to claim 1, characterized in that: The mounting body (100) comprises a handle (110) and two connecting seats (120) arranged at opposite ends of the handle (110); the knife sharpening seat (200) is located between the two connecting seats (120) and extends along the length direction of the handle (110); and the rotating shaft (300) is arranged between the two ends of the knife sharpening seat (200) and the corresponding connecting seats (120).

3. A handheld grinding device according to claim 2, characterized in that: The sharpening seat (200) is in the shape of a triangular prism. The outer surface of the sharpening seat (200) has three mounting positions, each of which is provided with a sharpening member (400). The surface roughness of the three sharpening members (400) decreases in sequence in a clockwise or counterclockwise direction.

4. A handheld grinding device according to claim 3, characterized in that: The knife sharpening seat (200) comprises two long side panels (210) and two end panels (220), wherein a side edge of the two long side panels (210) in the length direction coincides with each other, and the adjacent ends of the two long side panels (210) are connected via one end panel (220), and an open receiving groove (230) is defined between the two long side panels (210) and the two end panels (220), and a long mounting plate (240) is installed at the open portion of the receiving groove (230), and the knife sharpening seat (200) and the long mounting plate (240) are made of plastic, and the outer surface of the long mounting plate (240) and the outer surfaces of the two long side panels (210) are both formed with a mounting position.

5. The handheld grinding device according to claim 4, characterized in that: A plurality of first support ribs (250) supported between the inner walls of the two long side panels (210) are formed inside the accommodating groove (230), and the plurality of first support ribs (250) are arranged at intervals along the length direction of the long side panels (210). A support frame (241) that is tightly matched with the inner peripheral edge of the opening is provided on the side of the long mounting plate (240) away from the mounting position.

6. The handheld grinding device according to claim 1, characterized in that: The angle positioning mechanism (500) comprises a plurality of positioning grooves (510) distributed around the circumference of the rotating shaft (300) and corresponding one-to-one to the sharpening members (400), and a positioning protrusion (520) capable of elastically moving in and out of any of the positioning grooves (510); one of the positioning grooves (510) and the positioning protrusion (520) is provided on the mounting body (100), and the other is provided on the sharpening seat (200).

7. The handheld grinding device according to claim 6, characterized in that: The positioning groove (510) is a spherical concave portion, and the positioning protrusion (520) is a spherical bead. The spherical bead contacts a spring member (530) that drives the spherical bead to extend toward the spherical concave portion.

8. The handheld grinding device according to claim 2, characterized in that: The rotating shaft (300) is protrudingly arranged at both ends of the knife sharpening seat (200); the handle (110) and the two connecting seats (120) are an integral plastic structure; the two connecting seats (120) are respectively provided with a rotating guide portion (121) for rotating the adjacent rotating shaft (300); the rotating guide portion (121) abuts against the end of the rotating shaft (300) to prevent the knife sharpening seat (200) from moving relative to the mounting body (100) along the axial direction of the rotating shaft (300).

9. The handheld grinding device according to claim 8, characterized in that: The knife sharpening seat (200) and the mounting body (100) are provided with an axial hole channel (900) extending through the axial direction of the rotating shaft (300).

10. A knife sharpening device, characterized in that: include: A support (600) is provided on the support (600), and a clamping assembly (700) and a movable rocker arm (800) located above the clamping assembly (700), one end of the movable rocker arm (800) is rotatably connected to the support (600) through a ball pair, and the handheld grinding device according to any one of claims 1 to 9 is slidably nested in the movable rocker arm (800).

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