KR20150091446A

KR20150091446A - Knife grinding device

Info

Publication number: KR20150091446A
Application number: KR1020150099707A
Authority: KR
Inventors: 이승준
Original assignee: 이승준
Priority date: 2015-07-14
Filing date: 2015-07-14
Publication date: 2015-08-11

Abstract

The present invention relates to a knife grinding device including a driving shaft connected to a motor shaft. First and second grinding stones are inserted into the driving shaft and joined to each other. First and second grinding surfaces are formed in the outer sides of surfaces of the first and second grinding stones facing each other to be inclined so that a knife blade inserted between the first and second grinding surfaces meets with the grinding surfaces. Accordingly, both surfaces of the knife blade are precisely ground at the same time. In addition, a space unit is formed on the center of the second grinding stone when installing a spring applying an elastic force to a direction where the first and second grinding stones adheres to each other is installed in the outer side of the second grinding stone so that the second grinding stone moves closer to the first grinding stone as much as the first and second grinding surfaces are worn. Accordingly, the grinding space between the first and second grinding surfaces is constantly maintained. Therefore, the present invention is capable of remarkably reducing time required for grinding a knife by grinding both surfaces of the knife blade at the same time at one go even though the composition is simple, easily grinding the knife by automatically grinding the knife blade when the knife blade is inserted between the first and second grinding surfaces, and improving the durability of the grinding stones by moving the grinding stones closer to each other even though the grinding surfaces are worn to maintain the grinding space.

Description

Knife grinding device

The present invention relates to a grinding machine, and more particularly to a grinding machine having a drive shaft connected to a motor shaft, wherein a first grinding stone and a second grinding stone are fitted to a drive shaft, The first polishing surface and the second polishing surface are inclined so that the blade inserted between the first polishing surface and the second polishing surface coincides with the polishing surface so that both surfaces of the blade can be precisely ground at the same time, And a spring for exerting an elastic force in a direction in which the second grindstone adheres is provided on the outside of the second grindstone and a space is formed in a central portion of the second grindstone so that the first and second grindstones are abraded, So that the polishing space between the first polishing surface and the second polishing surface is kept constant, so that it is possible to provide a polishing apparatus of a simple structure, Since both sides of the blade can be changed at the same time, it is possible to significantly reduce the time for cutting, and when the blade is inserted between the first and second polishing surfaces, the blade is automatically cut, The blade can be safely protected because it is not inserted below the jogging line, and even if the abrasive surface is worn, the abrading stone is automatically brought into close contact with the abrasive stone so that the lifetime of the abrasive stone can be prolonged.

Generally, in order to sharpen the blade when the blade is weakened at the home or business, the blade is polished by bringing a polishing rod or a grindstone into contact with the blade.

Since grinding of a blade using a grinding wheel is an operation requiring experience, there is a problem that a beginner can hardly perform.

In order to solve this problem, an automatic calibrating device of Utility Model No. 20-0237825 registered in Korea was disclosed.

The above-described technique is configured to linearly reciprocate the grindstone by the motor and polish the blade, so that it is possible to carry out the grinding work more conveniently.

In the case of the above-described technique, since only one side of the blade contacting the grindstone is polished, when the grinding operation on the one side of the blade is completed, the other side of the blade is contacted to perform the polishing work.

At this time, if the user can not set the bonding pressure between the blade and the grindstone to the same value, there arises a problem in that the knife state is different with respect to both sides of the blade, which makes it difficult to use the knife.

In addition, since both sides of the blade are separately machined, there is a problem that it takes a lot of time. In addition, if the angle of contact between the grinding surface of the grinding wheel and the blade is finely matched, the blade is accurately polished. There is a problem that the blade can not be precisely adjusted because the blade can not be exactly aligned on the surface.

In other words, when grinding the blade with a grinding wheel or a grinding stone, the angle of the grinding surface of the grinding wheel and the side of the blade surface contacting the grinding wheel is finely and accurately maintained, If the angle of the contact surface is small and the angle of the contact surface is not large, the angle of the blade is changed beyond the center line of the fine blade, so that the blade is worn This is a problem that can not be solved.

In order to solve the above problems, according to the present invention, there is provided a motorcycle comprising: a drive shaft connected to a motor shaft, wherein a first grinding stone and a second grinding stone are coupled to each other by sandwiching the first grinding stone and the second grinding stone, The polishing surface and the second polishing surface are inclined so that the blade inserted between the first polishing surface and the second polishing surface coincides with the polishing surface so that both surfaces of the blade can be precisely ground at the same time, A spring is provided on the outer side of the second grinding stone and a space is formed in the center of the second grinding stone so that the second grinding stone adheres to the first grinding stone side as much as the first and second grinding surfaces become worn So that the polishing space between the first polishing surface and the second polishing surface is maintained to be constant, The cutting time can be significantly reduced. When the blade is inserted between the first polishing surface and the second polishing surface, the blade is automatically pierced, so that the curl can be easily realized. In particular, the contact angle between the polishing surface and the blade It has a merit of completely solving the fundamental problem that the angle should be kept fine, accurate and continuously, and even when the abrasive face is worn, the abrasive stone is automatically adhered, so that the abrasive space is kept constant, It is an object of the present invention to provide a curling apparatus which can be used for a long time.

In order to achieve the above object,

A drive shaft 40 connected to the motor shaft 31;

A first grinding stone 10 and a second grinding stone 20 which are fitted and coupled to the drive shaft 40;

A first polishing surface 12 and a second polishing surface 12 which are formed at an outer side of a facing surface of the first and second grinding stones 10 and 20 so as to form a polishing space in which the blades 61 can be inserted and polished, A second polishing surface 22;

.

According to the present invention, since both sides of the blade can be simultaneously worn at the same time, it is possible to remarkably reduce the time required for cutting, and when the blade is inserted between the first and second polishing surfaces, The grinding surface can be easily fabricated. In particular, it has an advantage of completely solving the fundamental problem that the angle of the contact surface between the grinding surface and the blade must be finely and accurately maintained, and even when the grinding surface is worn, And the lifetime of the grinding stone can be prolonged by maintaining the grinding space at a constant level. Therefore, it is possible to provide a grinding apparatus that can be used for a long time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a use state of a curling apparatus of the present invention. FIG.
2 is a sectional view showing a grinding stone applied to the present invention.
FIG. 3 is a perspective view showing a grinding stone applied to the present invention. FIG.
4 is a cross-sectional view showing a configuration of the essential part of the present invention.
5 is a view showing the use state of a recessed part configuration of the present invention.
6 is a sectional view showing another embodiment of the curling apparatus of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

According to the above drawings,

A drive shaft 40 connected to the motor shaft 31;

.

A spring 52 for applying elasticity in a direction in which the first grinding stone 10 and the second grinding stone 20 are in close contact with each other is disposed outside the second grinding stone 20, The first and second abrasive surfaces 12 and 22 are formed so that the second abrasive stone 20 adheres to the first abrasive stone 10 as much as the first and second abrasive surfaces 12 and 22 are worn, So that the polishing space between the surfaces 22 is kept constant.

A first bushing 41 is integrally formed at one end of the driving shaft 40 to be in close contact with the outer surface of the first grinding stone 10 and is integrally formed on the outer surface of the second grinding stone 20 at the end of the driving shaft 40 And the second bushing (43)

A plurality of fitting grooves 11 and 21 are formed on the outer surfaces of the first and second grinding stones 10 and 20 so as to be directed outward from the center of the first and second grinding stones 10 and 20, (43) are provided with fitting protrusions (42, 44) to be fitted in the fitting grooves (11, 21).

Further, the first grinding stone 10 is further provided with a protruding portion 13 fitted to the space portion 23 on one surface thereof.

The grinding device of the present invention is basically composed of a first grinding stone 10, a second grinding stone 20, a drive motor 30, a drive shaft 40, a finishing nut 50 and a stopping plate guide 70.

The drive motor 30 is provided with a motor shaft 31 and provides power for rotating the first grinding stone 10 and the second grinding stone 20 and is driven by a power source provided from a commercial power source or a battery.

The driving shaft 40 is inserted into the motor shaft 31 and coupled with the motor shaft 31 to rotate at a high speed and the first and second grinding stones 10 and 20 are fitted and coupled to the driving shaft 40.

A first bush 41 for supporting the first grinding stone 10 is integrally formed at one end of the drive shaft 40.

As shown in the figure, the first grinding stone 10 and the second grinding stone 20 are sequentially inserted and coupled to the drive shaft 40. The first grinding stone 10 and the second grinding stone 20 are closely fitted to the outer surface of the second grinding stone 20 at the end of the drive shaft 40 The first and second bushings 43,

A plurality of fitting grooves 11 and 21 are formed on the outer surfaces of the first and second grinding stones 10 and 20 so as to be directed outward from the center of the first and second grinding stones 10 and 20, The fitting protrusions 42 and 44 are fitted into the fitting grooves 11 and 21 so that the driving protrusions 42 and 44 are inserted into the fitting holes 11 and 21 of the driving shaft 40 are rotated, the rotational force can be transmitted to the first and second grinding stone 10, 20 as they are by the fitting projections 42, 44.

A finishing nut 50 is coupled to the end of the drive shaft 40 at the outer side of the second bushing 43. A spring 52 is interposed between the finishing nut 50 and the second bushing 43, So that the spring 52 always exerts an elastic force in a direction in which the first grinding stone 10 is in close contact with the second grinding stone 20.

In the meantime, the first grinding face 12 and the second grinding face 22 are formed on the first grinding stone 10 and the second grinding stone 20 applied to the present invention.

The first abrasive face 12 and the second abrasive face 22 are inclined at an outer side of the opposite face of the first abrasive stone 10 and the second abrasive stone 20 so that the blade 61 of the blade 60 And the first polishing surface 12 and the second polishing surface 22 simultaneously grind both surfaces of the blade 61 inserted into the polishing space.

A space 23 is formed inside the second grinding stone 20. The first grinding surface 12 and the second grinding surface 22 are worn by the grinding operation of the space portion 23, The abraded central portion A of the first abrasive stone 10 can be pushed in so that the first abrasive face 12 and the second abrasive face 22 are abraded as shown in Fig. Is moved to the first grinding stone 10 side so that the grinding space interval can always be maintained constant.

The first grindstone 10 has a protruding portion 13 protruding from the space 23 so that the protruding portion 13 guides the movement of the second grindstone 20, The movement of the first grinding stone can be driven more accurately.

With this function, even when the polishing operation is performed for a long time, the polishing space between the polishing surfaces 12 and 22 formed between the grinding stones 10 and 20 can maintain a constant size, so that the normal polishing operation can be realized. Further, it is possible to provide an effect of extending the service life of the grinding stone.

In addition, since the blade portion may be worn out without a guiding line having a constant inserted blade, the blocking plate guide 70 may be installed on the same imaginary line as the end of the V-shaped portion where the abrasive stone 1 or 2 abuts, The blocking plate guide 60 can be provided on the surface of the case to be hung.

Although not shown in the drawings of the present invention, the drive motor 30 can be incorporated in a separate case, and a switch capable of operating the drive motor 30 can be installed in the case.

In addition, a plug for supplying commercial power to the drive motor 30 may be connected to the case. In addition, when the battery is to be driven by a battery, a battery may be installed inside the case.

In the present invention configured as described above, the user grips the knife with the other hand while inserting the blade 61 into the polishing space while holding the case wrapped around the outside of the driving motor 30 with one hand, So that it is possible to expect an effect that the use becomes very simple.

In addition, even when used for a long time, the interval between the first grinding stone and the second grinding stone is narrowed automatically, and the grinding space is maintained at a constant interval, so that the life of the grinding stone can be prolonged.

6 illustrates another embodiment of the present invention,

A drive shaft 40 connected to the motor shaft 31;

A first polishing surface 12 and a second polishing surface 12 which are formed at an outer side of the facing surface of the first and second grinding stones 10 and 20 to form a polishing space in which the blades 61 are inserted and polished, A second polishing surface 22; Respectively,

Even if the blade 61 is forcedly inserted under pressure with the inner edge of the first polishing surface 12 and the second polishing surface 22 in contact with the outer circumference of the drive shaft 40, So that it is no longer inserted and thus the blade 61 can be automatically protected.

6, the first polishing surface 12 and the second polishing surface 22, to which the blade 61 is inserted, are formed so that the ends of the first polishing surface 12 and the second polishing surface 22 are in contact with the driving shaft 40, Even if the user inserts the blade 61 into the polishing space with a strong force, the end of the blade 61 contacts the outer circumference of the drive shaft 40 and is no longer inserted. Therefore, the end of the blade 61 is worn It is possible to prevent the phenomenon.

10: first grinding stone, 11: fitting groove,
12: first polishing surface, 20: second grinding stone,
21: fitting groove, 22: second polishing surface,
23: space portion, 30: driving motor,
31: motor shaft, 40: drive shaft,
41: first bushing, 42:
43: second bush, 44:
50: finishing nut, 52: spring,
13: protrusion,

Claims

A drive shaft 40 connected to the motor shaft 31;
A first grinding stone 10 and a second grinding stone 20 which are fitted and coupled to the drive shaft 40;
A first polishing surface 12 and a second polishing surface 12 which are formed at an outer side of a facing surface of the first and second grinding stones 10 and 20 so as to form a polishing space in which the blades 61 can be inserted and polished, A second polishing surface 22;
And a cutting device for cutting the curl.

The method according to claim 1,
A spring 52 for applying elasticity in a direction in which the first grinding stone 10 and the second grinding stone 20 adhere is disposed outside the second grinding stone 20 and a space portion 23 The first and second abrasive surfaces 12 and 22 are worn so that the second abrasive stone 20 adheres to the first abrasive stone 10 as much as the first abrasive surface 12 and the second abrasive surface 12 22) is maintained to be constant.

The method according to claim 1,
A first bushing 41 is integrally formed at one end of the drive shaft 40 and is in close contact with the outer surface of the first grinding stone 10 and is attached to the end of the drive shaft 40 in close contact with the outer surface of the second grinding stone 20 The second bushing 43 is engaged with the second bushing 43,
A plurality of fitting grooves 11 and 21 are formed on the outer surfaces of the first and second grinding stones 10 and 20 so as to be directed outward from the center of the first and second grinding stones 10 and 20, (43) is provided with fitting projections (42, 44) to be fitted in the fitting grooves (11, 21).

The method according to claim 1,
Make sure that the blade is no longer lowered on the shortest side of the inserted blade and the shortest side of the V-shaped edge that comes into contact with the grinding stone and the same virtual line as the line that matches the case (the blade is worn below this imaginary line) Wherein a stop plate guide is formed.

A drive shaft 40 connected to the motor shaft 31;
A first grinding stone 10 and a second grinding stone 20 which are fitted and coupled to the drive shaft 40;
A first polishing surface 12 and a second polishing surface 12 which are formed at an outer side of a facing surface of the first and second grinding stones 10 and 20 so as to form a polishing space in which the blades 61 can be inserted and polished, A second polishing surface 22; Respectively,
Even if the blade 61 is forcedly inserted under pressure with the inner edge of the first polishing surface 12 and the second polishing surface 22 in contact with the outer circumference of the drive shaft 40, So that the blade 61 is prevented from being inserted. Thus, the blade 61 can be protected automatically.