CN2158324Y - household knife sharpener - Google Patents

Abstract

A household knife sharpener, driven by a motor, drives a wheel shaft at a slightly outwardly inclined angle. A base is provided on the vertical base surface through which the wheel shaft passes, and the wheel shaft is positioned in cooperation with a bearing. A sleeve is sleeved on the upper end of the wheel shaft, and a grinding wheel is sleeved outside the sleeve. The wheel body is composed of three layers of plastic, foam material and diamond sand from the inside to the outside. A step surface is provided on the upper end surface of the inner layer, for a fixed cover to be sleeved and its polygonal column is embedded in the sleeve positioning hole, and a polygonal groove at the other end is provided for a nut to tighten the wheel shaft. The upper cover is sleeved on the outside of the grinding wheel and fixed on the machine body, and a notch is provided on the inner side of the grinding wheel to form a knife-resting surface, so that the two side blades of various knives can be placed in the knife-resting surface for sharpening.

Description

The utility model relates to an improvement of a knife sharpener, in particular to a portable household knife sharpener.

As we all know, in the early days, most of the people used manpower to sharpen the blade on the whetstone, which was time-consuming and laborious, and it required a fairly skilled sharpening technology to sharpen the blade. However, due to the prevalence of electric tools in modern times, someone invented the grinding wheel. Machine to replace the whetstone, and provide a more labor-saving and quick way to sharpen the knife. However, the general grinder structure is driven by a motor to rotate the grinding wheels on both sides at a constant speed, so that the user can press the blade of the tool against the rotating grinding wheel at an appropriate angle, and then use its rotation to grind the tool to make the blade sharper. And complete the work of sharpening the knife. This kind of improvement, which replaces manual sharpening with machines, saves time and effort compared with the earlier manual sharpening methods, and makes sharpening quicker and improves work efficiency. As shown in Figure 1, the grinding wheel 8 of a conventional grinder is made of hard materials. Its structure has a shaft hole 80 in the center for the motor spindle to pass through and drive, and drives the grinding wheel 8 to rotate at a constant speed. Although it is more traditional The manual knife sharpening method has made progress, but it still has the following shortcomings that are not practical and need to be improved.

One is because the grinding technique is quite difficult, so it is not competent for ordinary people, and therefore the work and the use of the machine still need to be competent by skilled knife sharpeners and excellent experience, so the applicability of the product is poor;

The second is that when the hard grinding wheel and the tool are ground against each other, the rigid contact will produce a huge reaction force, which makes the tool unable to be held stably, and is prone to jumping, making the tool and the grinding wheel in a state of intermittent contact and pressure. That is to say, the sharpening operation is carried out intermittently and the applied force is difficult to control freely, so that the contact angle and depth between the blade and the grinding wheel cannot be kept constant at all. Therefore, the edge of the ground blade is not smooth, that is, the sharpness of the ground blade is limited, and it is difficult to be called perfect.

The purpose of the utility model is to provide a household knife sharpening machine which is easy to carry, simple to operate, quick to sharpen, convenient and labor-saving.

The technical solutions of the utility model are as follows: 1. The power system and the grinding wheel are installed in one body, and a handle is provided to achieve easy portability and convenient placement and use; The sharpening of the similar blade surface achieves the purpose of easy operation, fast sharpening and quality assurance. For this reason, the utility model includes a body and a power system for driving the grinding wheel that is sequentially connected by a motor, a transmission shaft, a helical gear set and a wheel shaft, and a loam cake fixed on the body. One side is provided with a handle and a power box for placing the motor, and the other side is provided with a base surface on which a base is provided; the front end of the grinding wheel is slightly tapered and the rear end is straight. The two ends are embedded with a shaft sleeve and a fixed cover, and the wheel shaft passes through the base, the shaft sleeve, the grinding wheel and the fixed cover in sequence, and one end is positioned by the base with a bearing and the other end is fastened by a nut. In addition, a notch is opened on the inner side of the upper cover relative to the grinding wheel, and a tool abutment surface with an appropriate angle is formed.

It can be seen from the above that the utility model has the following advantages: 1. It is easy to carry and use occasions at will; profit effect. For example, for a knife with a wider blade surface and a larger blade angle (such as a kitchen knife), just put it into the notch to make the grinding action with the front oblique cone surface of the grinding wheel; The cutter (such as a fruit knife), just put it into the slot so that it is flat with the rear end of the grinding wheel for grinding.

The accompanying drawings of the utility model are as follows:

Figure 1 is a schematic diagram of the appearance of a conventional grinding wheel sharpener.

Fig. 2 is a schematic diagram of the combined three-dimensional structure of the utility model.

Fig. 3 is a structural schematic diagram of removing the upper cover of the utility model.

Fig. 4 is a partial sectional view of the transmission structure and the grinding wheel of the present invention.

Fig. 5 is a front view of the transmission part of the utility model.

Fig. 6 is an exploded view of the three-dimensional system of the grinding wheel assembly of the present invention.

Fig. 7 is a schematic diagram of the positions of the upper cover and the grinding wheel of the present invention.

Fig. 8 is a schematic tangent diagram of the grinding wheel of the present invention in action.

Fig. 9 is a diagram of an embodiment of a tool with a wide and thick grinding edge surface of the present invention.

Fig. 10 is a cross-sectional view of an embodiment of a tool with a wide and thick grinding edge surface of the present invention.

Fig. 11 is a diagram of an embodiment of a flat and thin cutter with a grinding blade surface of the present invention.

Fig. 12 is a cross-sectional view of an embodiment of a flat and thin cutter with a grinding blade surface of the present invention.

Below we give a better embodiment of the utility model according to Fig. 2-Fig. 12, and describe the embodiment in order to further provide technical details of the utility model.

Please refer to Fig. 2-Fig. 5, the structure of the knife sharpening machine of the present invention is to form a handle 11 and a power box 12 for placing the motor on the 1-side of the body, and set a button 13 to control the opening and closing or rotating speed of the motor, and The other side is preset with a base surface 14, inside of which a drive shaft 16 is led by the spindle of a motor 15, and two helical gear sets 17 are set opposite to each other on the drive shaft 16, and each drives a drive shaft at a slightly outward angle relative to the drive shaft 16. The wheel shaft 18 passes through the relatively vertical base surface 14, and the wheel shaft 18 is positioned with the base 19 fixed on the base surface 14 and the bearing 20; as shown in Figure 6, a shaft sleeve can be sleeved on the upper end of the wheel shaft 18 3 is on the outer upper end of the base 19, and the upper end of the shaft sleeve 3 forms a polygonal positioning hole 31, and the outer diameter is spaced with slots 32, and the inner diameter of a corresponding grinding wheel 4 is set relative to the slot 32 on the shaft sleeve 3. The column 41 is sleeved on the outside of the shaft sleeve 3 . The front end of the grinding wheel 4 is slightly tapered and the outer diameter of the rear end is straight. A first-order surface 45 is provided for a fixed cover 5 to be inserted and its protruding polygonal column 51 is inserted into the positioning hole 31 of the shaft sleeve 3, and the other end is provided with a polygonal groove 52 as a place for the nut 6 of the tightening wheel shaft 18 Space; as shown in Figure 7, another cover is placed outside the grinding wheel 4 and fixed on the upper cover 7 on the body 1, and it has two slots 71, 72 relative to the inner side of the two grinding wheels 4 to form a knife rest respectively. Surfaces 711, 721.

The utility model has two grinding wheels 4, mainly because there are many types and forms of knives, and the blades can generally be divided into single-sided cutting blades or double-sided cutting blades. Put the knife into the slot 71 or 72 and stick the left side of the knife against the knife resting surface 711 or 721 for contact grinding. If the left side blade is ground, you can stick the right side of the knife against the slot 72 Or 71 knife against surface 721 or 711 to grind; and after loam cake 7 is fixed, the position of two missing grooves 71,72 can make it keep certain positional relation with grinding wheel 4 all the time, and lack groove 71,72 and knife against surface 711 and 721 are formed at an appropriate angle, which makes the knife sharpening operation easier and ensures the quality of knife sharpening.

It is worth mentioning that the two grinding wheels 4 are opposite to each other at an inclination angle, and have an appropriate elevation angle on the base surface 14 of the body 1 and the bottom surface, so that the knife is ground as shown in Figure 8, according to its relationship with the grinding wheel 4 The line formed by the contact points is an oblique line, so that it can achieve a better grinding effect; when you want to grind a knife with a wider blade surface and a larger edge angle, such as a kitchen knife, please refer to Figure 9 for the operation method. Fig. 10, it is put into the slot 71 or 72, and the tool and the oblique cone surface at the front end of the grinding wheel 4 are used for grinding. The angle θ is relatively large, so it is suitable for grinding knives with wide and thick blade surfaces; when you want to grind knives with flat and thin blade surfaces and small blade angles, such as small knives such as fruit knives, please refer to Figure 11 and Figure 12 for the operation method. It is put into the notch 71 or 72, so that the tool and the rear end flat surface of the grinding wheel 4 perform grinding action, because the angle θ between the rear end flat surface of the grinding wheel 4 and the tool abutment surface 711 or 721 is small, Therefore, it is suitable for grinding knives with flat and thin blades.

The grinding wheel 4 of the present utility model is positioned by inserting the inner diameter column 41 into the slot 32 of the base 3 and cooperating with the nut 6, that is, it can be easily assembled and replaced, and the structure of the grinding wheel 4 is composed of three different layers. The material is integrally formed, please refer to Fig. 6, or the plastic layer 42, the elastic foam layer 43 and the corundum layer 44 are a separate combination, or the plastic layer 42 and the elastic foam layer 43 are integrated, and the corundum layer The layer 44 is independent, or the plastic layer 42 is independent, and the elastic foam layer 43 and the corundum layer 44 are integrated. This variety of structural forms can not only be achieved in manufacturing, but also can be easily replaced by consumers. And selection; because the elastic foam layer 43 can eliminate the reaction force and vibration when sharpening the knife, it can grind out a sharper blade surface, and this means that the general rigid grinding wheel is easy to vibrate and the cutting edge is rough when grinding the blade head-on. The main reason why it is not easy to sharpen.

Claims (5)

1, a kind of home-use knife sharpener, comprise body (1) and place becoming driving abrasive wheel (4) dynamical system of transmission connection successively and being fixed in loam cake (7) on this body (1) in this body (1) by motor (15), power transmission shaft (16), bevel gear set (17) and wheel shaft (18), a side that it is characterized in that this body (1) is established carrying handle (11) and is put the headstock (12) of motor (15), its in addition side give and be provided with a basal plane (14) that connects mutually with loam cake (7), wheel shaft (18) passes this basal plane (14); Pedestal (19) and fitted bearing (20) location wheel shaft (18) is set on this basal plane (14); The two ends of abrasive wheel (4) are respectively equipped with into the axle sleeve (3) and the fixed cap (5) of nested connection, and their mutual connections, wheel shaft (3) passes basal plane (14), pedestal (19), axle sleeve (3), abrasive wheel (4) and fixed cap (5) successively, and is fastening by nut (6) at last; The wheel body front end of abrasive wheel (4) slightly then is flat in tool tapering its rear end; Loam cake (7) has short slot (71), (72) with respect to the inboard of two abrasive wheels (4), and forms cutter respectively by face (711), (712).

2, according to the described knife sharpener of claim 1, it is characterized in that this two abrasive wheel (4) is that wheel shaft (3) is sheathed and passes this and relatively be vertical basal plane (14), and be relatively angle, and has a suitable elevation angle with the bottom surface of body (1) for outwards inclining slightly.

3, according to claim 1 or 2 described knife sharpeners, it is characterized in that this abrasive wheel (4) is to be made of three layers of different materials one, its internal diameter is provided with bar post (31), the upper surface of its internal layer is provided with the terrace (45) that is inserted in for fixed cap, wheel body is from inside to outside or by plastic layer (42), flexible foaming layer (43) and corundum layer (44) become the separate type combination, or form one by plastic layer (42) and flexible foaming layer (43) earlier, combine with the corundum layer (44) of independent form again, or plastic layer (42) is an independent form, and flexible foaming layer (43) and corundum layer (44) combining for integral type.

4, according to claim 1 or 3 described knife sharpeners, the upper end that it is characterized in that said axle sleeve (3) be provided with the polygonal locating hole (31) of pedestal (19) bolt and its external diameter be interval with abrasive wheel (4) on the caulking groove (32) that is nested of bar post (41).

5, according to claim 1 or 3 described knife sharpeners, it is characterized in that: the convex extension part of said fixed cap (5) be provided with axle sleeve (3) on the be nested polygonal locating hole (51) that connects and be provided with the polygonal groove (52) of inserting nut (6) at its end face of locating hole.

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