Roller knife sharpener

Abstract

The utility model relates to a roller knife sharpener which comprises a shaft rod, a roller, a knife sharpening assembly and a holding shell. The shaft rod is rotatably connected with the bearing; the roller sleeves the middle part of the shaft rod; the knife sharpening assembly is fixed to the end of the shaft rod. And the holding shell covers the outer part of the roller and is matched with the outer part of the bearing. When a user uses the roller sharpener, the user holds the holding shell with a hand, then aligns the sharpening blade of the sharpening assembly at the end to a to-be-sharpened blade on the side to drive the roller sharpener to reciprocate, the sharpening blade acts on the shaft rod after being pressed in the moving process, and the shaft rod rotates to enable the sharpening blade to form a more uniform and smooth sharpening mode in the rotating process. Meanwhile, due to the fact that the shell forms protection and distance intervals, compared with an existing mode that the hand directly makes contact with a roller in the middle, the safety protection effect is achieved, and due to the fact that the holding area of the shell is increased, force application is easier to control.

Description

Technical Field

[0001] The utility model relates to a knife sharpening device, in particular to a drum type knife sharpening device. Background Art

[0002] For conventional knife sharpeners, the sharpener is usually kept stationary, and the blade to be sharpened is then reciprocated relative to the sharpener to achieve sharpening.

[0003] In the prior art, there are drum-type knife sharpeners. These new types of knife sharpeners have a rotating shaft with a sharpening blade at the end. During use, the user holds the blade to be sharpened stationary and then moves the sharpener back and forth in contact with the blade. This method allows for a more comprehensive sharpening of the blade. Compared to traditional sharpening methods, the movement of the sharpener makes it easier to fully sharpen the blade.

[0004] However, the existing drum-type knife sharpener also has certain problems, namely, the position where the user grips is relatively close to the blade being sharpened, which can easily injure the hand, and the magnitude of the applied force is difficult to control. Utility Model Content

[0005] The main purpose of the utility model is to provide a technology that is convenient for users to hold and keeps their hands away from the blade sharpening process.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a drum knife sharpener, which includes a shaft, a drum, a knife sharpening assembly and a gripping shell.

[0007] The shaft is rotatably connected to the bearing;

[0008] The roller is sleeved on the middle part of the shaft;

[0009] The sharpening assembly is fixed to the end of the shaft;

[0010] The gripping shell cover is arranged on the outside of the drum, and the gripping shell is matched with the outside of the bearing.

[0011] Preferably, the knife sharpening assembly comprises a rolling disc, a grinding disc base and a grinding blade from the inside out, and the central holes of the rolling disc and the grinding disc base are respectively detachably connected and fixed to the threaded portion of the end of the shaft.

[0012] Preferably, the outer side surface of the grinding disc base has a mounting slot, and the grinding blade is snap-fitted and mounted in the mounting slot.

[0013] Preferably, the shaft has a shaft cross section, and the roller has a planar raised hole, which is tightly fitted with the shaft cross section.

[0014] Preferably, the grinding blade is a diamond electroplated grinding blade or a spray-coated grinding blade.

[0015] Preferably, sharpening assemblies are respectively provided at both ends of the shaft.

[0016] Preferably, the gripping shell has a shell body plate and a supporting circular inner plate, the middle of the supporting circular inner plate is fixedly matched with the bearing, and the shell body plate has an upper gripping plane, an intermediate transition curved plate and a lower gripping plane connected in sequence.

[0017] Preferably, the upper gripping plane and the lower gripping plane are provided with anti-slip raised lines.

[0018] The beneficial effects of the solution of the utility model are as follows: when in use, the user holds the outer shell by hand, and then aligns the sharpening blade of the sharpening assembly at the end with the blade to be sharpened at the side, driving the roller sharpener to reciprocate. During the movement, the sharpening blade is subjected to pressure and acts on the shaft, and the shaft rotates to form a more uniform and smooth grinding method during the rotation of the sharpening blade; at the same time, since the outer shell forms protection and distance intervals, it has a safe protection effect compared to the existing hand directly contacting the middle roller, and since the gripping area of ​​the outer shell is increased, it is easier to control when applying force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a schematic diagram of the side view of the utility model;

[0021] Figure 2 This is a schematic diagram of the roller shaft cooperation of the utility model;

[0022] Figure 3 It is a schematic diagram of the grip shell of the present utility model;

[0023] Figure 4 It is a schematic diagram of a planed surface view of the present utility model;

[0024] Figure 5 It is a schematic diagram of an exploded view of the present utility model;

[0025] Description of reference numerals:

[0026] 1- shaft; 11- shaft cross section;

[0027] 2- roller; 21- flat raised hole; 22- threaded portion;

[0028] 3-sharpening assembly; 31-rolling disc; 32-grinding disc base; 33-sharpening blade; 321-mounting slot;

[0029] 4- gripping shell; 41- shell body plate; 42- supporting circular inner plate; 411- upper gripping plane; 412- middle transition curved plate; 413- lower gripping plane;

[0030] 5-Bearings. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Example 1:

[0033] like Figures 1 to 5 As shown, this embodiment provides a roller knife sharpener, which includes a shaft 1, a roller 2, a knife sharpening assembly 3 and a gripping shell 4.

[0034] The shaft 1 is rotatably connected to the bearing 5;

[0035] The roller 2 is sleeved on the middle part of the shaft 1;

[0036] The sharpening assembly 3 is fixed to the end of the shaft 1;

[0037] The holding shell 4 is disposed on the outside of the drum 2 , and the holding shell 4 is matched with the outside of the bearing 5 .

[0038] During use, the user holds the housing 4 in hand, and the outer side of the sharpening assembly 3 is attached to the cutting tool, and then the contact generates pressure to sharpen the cutting tool. The user drives the roller sharpener to move back and forth relative to the fixed cutting tool. During this process, the sharpening assembly 3 will act in the opposite direction to the shaft 1 and rotate, forming a more uniform grinding effect.

[0039] Example 2:

[0040] On the basis of Example 1, in the preferred embodiment of this embodiment, the sharpening assembly 3 has a rolling disc 31, a grinding disc base 32 and a grinding blade 33 from the inside to the outside, and the center holes of the rolling disc 31 and the grinding disc base 32 are respectively detachably connected and fixed to the threaded portion 22 at the end of the shaft 1, that is, the rolling disc 31 and the grinding disc base 32 are fixed to the end of the shaft 1 by threaded connection.

[0041] Preferably, the outer side surface of the grinding disc base 32 has a mounting slot 321 , and the grinding blade 33 is snap-fitted and mounted in the mounting slot 321 .

[0042] Preferably, the shaft 1 has a shaft cross section 11 (i.e., a flat portion is formed), and the roller 2 has a flat raised hole 21, which is tightly fitted with the shaft cross section 11. In this way, when the shaft 1 rotates, it will drive the roller 2 to rotate. The roller 2 has a certain counterweight, so when grinding the tool, the shaft 1 will rotate more stably and the rotation speed will be controlled.

[0043] Preferably, the grinding blade 33 is a diamond electroplated grinding blade or a sprayed grinding blade, or other existing blades suitable for sharpening, such as a diamond grinding blade or a grinding wheel grinding blade.

[0044] Preferably, sharpening assemblies 3 are respectively provided at both ends of the shaft 1 to improve application scenarios and make use more conveniently.

[0045] Preferably, the gripping shell 4 has a shell main body plate 41 and a supporting circular inner plate 42, the middle part of the supporting circular inner plate 42 is fixedly matched with the bearing 5, and the shell main body plate 41 has an upper gripping plane 411, an intermediate transition curved plate 412 and a lower gripping plane 413 connected in sequence. The user's hand can grasp the area formed by the upper gripping plane 411, the intermediate transition curved plate 412 and the lower gripping plane 413, which is very convenient and increases the force-bearing area.

[0046] Preferably, the upper gripping plane 411 and the lower gripping plane 413 have anti-slip raised lines.

[0047] The beneficial effects of the solution of the present utility model are as follows: when in use, the user holds the outer shell by hand, and then aligns the sharpening blade of the sharpening assembly at the end with the blade to be sharpened on the side (the outer side of the sharpening blade contacts the blade to be sharpened), driving the roller sharpener to reciprocate, and during the movement, the sharpening blade is subjected to pressure and acts on the shaft, and the shaft rotates to form a more uniform and smooth grinding method during the rotation of the sharpening blade; at the same time, because the outer shell forms protection and distance intervals, compared with the existing method of directly contacting the middle roller with the hand, that is, there is an outer fixed cylinder and an inner rotating cylinder in the prior art, and the hand directly contacts the outer fixed cylinder, this method has a small contact area and insufficient protection. The present application has a safety protection effect, and because the gripping area of ​​the outer shell is increased, it is easier to control when applying force.

[0048] In other preferred solutions, the projection area of ​​the gripping shell 4 in the axial length direction of the shaft 1 covers the entire rolling disk 31 and covers at least a portion of the grinding disk base 32. This method not only facilitates the sharpening operation of the blade without affecting it, but also plays a good protective role, keeping the hand contact area away from the sharpening assembly.

[0049] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A drum knife sharpener, characterized in that: include: A shaft (1) rotatably connected to a bearing (5); The roller (2) is sleeved on the middle part of the shaft (1); A sharpening assembly (3) fixed to the end of the shaft (1); The holding shell (4) is arranged on the outside of the roller (2), and the holding shell (4) is matched with the outside of the bearing (5).

2. The drum knife sharpener according to claim 1, characterized in that The sharpening assembly (3) comprises a rolling disc (31), a grinding disc base (32) and a sharpening blade (33) from the inside out, and the central holes of the rolling disc (31) and the grinding disc base (32) are respectively detachably connected and fixed to the threaded portion (22) at the end of the shaft (1).

3. The drum knife sharpener according to claim 2, characterized in that The outer side surface of the grinding disc base (32) is provided with a mounting notch (321), and the grinding blade (33) is snap-fitted and mounted in the mounting notch (321).

4. The drum knife sharpener according to claim 1, characterized in that The shaft (1) has a shaft cross section (11), and the roller (2) has a planar protruding hole (21), and the planar protruding hole (21) is tightly fitted with the shaft cross section (11).

5. The drum knife sharpener according to claim 1, characterized in that The grinding blade (33) is a diamond electroplating grinding disc or a spraying grinding disc.

6. The drum knife sharpener according to claim 1, characterized in that The knife sharpening components (3) are respectively arranged at both ends of the shaft (1).

7. The drum knife sharpener according to claim 1, characterized in that The gripping shell (4) comprises a shell body plate (41) and a supporting circular inner plate (42), wherein the middle portion of the supporting circular inner plate (42) is fixedly matched with the bearing (5), and the shell body plate (41) comprises an upper gripping plane (411), an intermediate transition curved plate (412) and a lower gripping plane (413) which are connected in sequence.

8. The drum knife sharpener according to claim 7, characterized in that The upper gripping plane (411) and the lower gripping plane (413) are provided with anti-slip raised lines.

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