KR20100003048U - Brush device of hand grinder - Google Patents

Abstract

The present invention forms a protruding end in the brush holder and couples the brush holder with the brush holder in use by forming a first space and a second space having a shape corresponding to the protruding end and the body of the brush holder to a coupling coupled with the brush holder. The present invention relates to a brush mechanism of a hand grinder which can reduce vibration of the hand grinder by increasing the coupling precision of the ring. The brush mechanism of the hand grinder according to the present invention has a brush holder 20 in which a wire 110 is implanted on one side, and a shaft 24 is formed on the other side, and the shaft 24 of the brush holder 20 is inserted on one side. And, the hand grinder 100 is coupled to the other side is configured to include a coupling 40 for convenient attachment and detachment of the brush holder 20. Brush holder 20 has an opening 32 on one side, the body 30 is formed with a hollow 34 therein; A protruding end 22 having an outer diameter smaller than the outer diameter of the body 30 on the other side of the body 30 and protruding in a direction opposite to the opening 32; It includes a shaft 24 which protrudes from the protruding end 22 and has a groove 26 and is coupled to the coupling 40. Coupling 40 is formed so that the rear end is coupled to the hand grinder 100, the hollow 52 which is inserted into the shaft 24 of the brush holder 20 is inserted into the center is formed in the front end, the hollow ( 52 is formed in communication with the first end 54 of the protruding end 22 of the brush holder 20 is inserted, the second space in which the front side of the body 30 is inserted in front of the first space ( An inner barrel 50 in which 56 is formed; It is characterized in that it comprises an outer barrel 60 to be slidably coupled to the outer circumference of the inner barrel 50 to detach the brush holder 20.

Hand Grinders, Brushes, Brush Holders, Couplings

Description

Brush mechanism of hand grinder {BRUSH DEVICE OF HAND GRINDER}

The present invention relates to a brush mechanism of a hand grinder, and more specifically, a first space having a shape corresponding to a protrusion and a body of the brush holder in a coupling coupled to the brush holder, and coupled to the brush holder. And a brush mechanism of the hand grinder which can reduce vibration of the hand grinder by increasing the coupling precision of the brush holder and the coupling in use by forming and joining the second space.

In addition, the present invention relates to a brush mechanism of a hand grinder which can increase convenience for attaching and detaching a brush holder by making the locking ring of the coupling slideable in a direction that is coupled with the hand grinder.

In general, a hand grinder attaches a wire to a rotating shaft that operates at high speed by motor driving or air pressure of a compressor, thereby polishing or polishing a surface of an object made of wood, stone, or various metals. It is a kind of power tool to grind less processed parts, edges, etc. and finish it.

To grind the surface of the object in such a hand grinder it is used by placing or fixing the wire in the brush. This conventional brush is open at one side, the wire is placed and fixed through the opening, and the shaft that is coupled with the hand grinder is projected on the opposite side where the wire is placed and fixed.

Such a brush is difficult to attach and detach the brush, it is difficult to use a variety of brushes because it is mounted on the hand grinder using a holt chuck installed on the hand grinder.

In order to solve the above problems, the Republic of Korea Utility Model Registration No. 20-0373648 "Abrasive Holder Detachable Structure of Hand Grinder" is equipped with an abrasive for processing an object on one side and an insert having a groove on the other side. A coupling having a rod having a rod formed therein, a coupling hole having a seating portion for accommodating the rod of the polishing holder, and a screw hole fastened to a rotary shaft of the grinder body, and being slidably moved on the circumferential surface of the coupling; It is proposed to consist of a sleeve that is mounted so that it can be mounted, and a locking ball which is arranged to lock and release the polishing holder while bulging toward the through hole formed in the center of the coupling in accordance with the movement of the sleeve.

Such a conventional technique is difficult to remove the polishing holder because the sliding direction of the sleeve of the coupling coupled between the polishing holder and the hand grinder slides in the direction of the polishing holder to which the wire is coupled, which may injure the hand. There was a risk of a safety accident. In addition, the protrusion and the coupling of the holder for fixing the polishing holder has a problem that the groove is easily worn and the life is short, and the coupling precision between the holder and the coupling is relatively low, so that the vibration cannot be effectively reduced.

On the other hand, the technique of Japanese Patent Application Laid-Open No. 63-13636 is easier to attach and detach the brush holder and the coupling than the above-described technique, and the brush holder is fixed in a hexagonal cross-sectional structure, so that the brush holder is stable. It can be expected to support this effect.

However, since the fixing of the brush holder is made only in the shaft of the brush holder, there is a structurally insufficient part in preventing vibration generated when brushing.

Therefore, the present invention has been proposed to improve such a conventional problem, and forms a protrusion on the brush holder, the first space having a shape corresponding to the protrusion and body of the brush holder on the coupling coupled with the brush holder and It is to provide a brush mechanism of a new type of hand grinder that can reduce the vibration of the hand grinder by increasing the coupling precision of the brush holder and the coupling in use by forming and combining the second space.

In addition, the present invention provides a brush mechanism of a new type hand grinder which can increase the convenience of attaching and detaching the brush holder by allowing the locking ring of the coupling to slide in the direction in which the coupling is coupled with the hand grinder.

According to a feature of the present invention for achieving the above object, the wire holder 110 is placed on one side, the shaft 24 is formed on the other side, and the shaft of the brush holder 20 on one side In the brush mechanism of the hand grinder including a coupling (40) inserted therein, and a hand grinder (100) coupled to the other side to facilitate attachment and detachment of the brush holder (20).

The brush holder 20 has an opening 32 at one side thereof and a hollow 34 formed therein;

A protruding end 22 having an outer diameter smaller than the outer diameter of the body 30 on the other side of the body 30 and protruding in a direction opposite to the opening 32;

A shaft (24) protruding from the protruding end (22) and having a recess (26) and coupled to the coupling (40);

The coupling 40 is formed so that the rear end is coupled to the hand grinder 100, the hollow 52 which is inserted into the shaft 24 of the brush holder 20 is inserted into the front end is formed in the front end, the front end The first space 54 is formed in communication with the hollow 52 from the protruding end 22 of the brush holder 20, the front side of the body 30 in front of the first space 54 An inner barrel 50 in which the second space 56 to be inserted is formed;

It is characterized in that it comprises an outer barrel 60 is coupled to be slidable around the outer side of the inner barrel 50 to detach the brush holder 20.

In the brush mechanism of the hand grinder according to the present invention, the shaft 24 of the brush holder 20 is characterized in that it has a hexagonal cross section.

According to the brush mechanism of the hand grinder according to the present invention as described above, the first space and the first to form a protruding end in the brush holder, and has a shape corresponding to the protruding end and the body of the brush holder in the coupling coupled to the brush holder; By forming and combining two spaces, it is possible to reduce vibration of the hand grinder by increasing the coupling accuracy of the brush holder and the coupling when used.

In addition, by enabling the locking ring of the coupling to slide in the direction in which the hand grinder is coupled, there is an effect of increasing convenience for convenient attachment and detachment of the brush holder.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings, Figures 1 to 4, the same reference numerals are denoted with respect to the components performing the same function in Figures 1 to 4. Meanwhile, in the drawings and the detailed description, illustrations and references to constructions and operations easily understood by those skilled in the art from brush devices of general hand grinders are briefly or omitted. In particular, in the drawings and detailed description of the drawings, detailed descriptions and illustrations of specific technical configurations and operations of elements not directly related to the technical features of the present invention are omitted, and only the technical configurations related to the present invention are briefly shown or Explained. In addition, although the size ratio between elements is somewhat different in the drawings of the drawings, or the size between the parts that are coupled to each other is expressed differently, the representation differences in such drawings are easily understood by those skilled in the art. The descriptions are omitted since they are possible parts.

1 is a perspective view of a brush mechanism of a hand grinder according to a preferred embodiment of the present invention, Figures 2a to 2c is a combined perspective view of the brush mechanism of a hand grinder according to a preferred embodiment of the present invention, Figure 3a 3 is an exploded cross-sectional view of a brush mechanism of a hand grinder according to a preferred embodiment, FIG. 3B is a cross-sectional view of a brush mechanism of a hand grinder according to a preferred embodiment of the present invention, and FIG. 4 is a cross-sectional view of a hand grinder according to a preferred embodiment of the present invention. It is a figure for demonstrating the process of combining and disconnecting a brush mechanism.

1 to 4, the brush 10 of the hand grinder according to the preferred embodiment of the present invention includes a brush holder 20 and a coupling 40.

Brush holder 20 has an inclined portion 36 so that one side is an opening 32 so that the circumference is inclined inward, the body 30 having a hollow 34 therein, and the body (on the other side of the body 30) It has an outer diameter smaller than the outer diameter of 30, and has a protruding end 22 protruding in a direction opposite to the opening 32, and a shaft 24 protruding from the protruding end 22 to form a groove 26. At this time, the shaft 24 is configured to have a hexagonal cross section.

Coupling 40 is coupled to the hand grinder 100 to facilitate the attachment and detachment of the brush holder 20 described above, the inner barrel 50, outer barrel 60, spring 44, washer 46 ) And a stop ring 48.

First, the inner barrel 50 has a coupling portion 58 in which a screw is formed inside so that the rear end is screwed with the rotating shaft (not shown) of the hand grinder 100, and the brush holder 20 at the center side from the front end to the rear end. The first space 54 and the first space 54 is inserted into the hollow 52 is inserted into the shaft 24 is inserted into the shaft (52), the communication end 22 of the brush holder 20 is inserted It comprises a front end portion 53 is formed in the front end of the first space 54, the second space 56 is inserted into the front side of the body 30 of the brush holder 20. At this time, the hollow 52 has a hexagonal shape that is the same shape as the shaft 24 of the brush holder 20, the outer periphery of the front end portion 53 is formed with the first space 54 and the second space 56 It is formed to have an outer diameter smaller than).

Meanwhile, the hollow 52 of the inner barrel 50 is formed to be inclined from the outside to the inside at a position corresponding to the groove 26 formed in the shaft 24 of the brush holder 20 when the brush holder 20 is inserted. The ball hole 51 is formed.

The outer barrel 60 is slidably coupled to the outer circumference of the inner barrel 50 so as to detach the brush holder 20 by sliding in the direction of the hand grinder 100, so that the front end of the inner barrel 50 ( 53 has a contact portion 62 formed to have the same outer diameter as the outer diameter of the front end portion 53 at the rear side of the front end portion 53 to closely contact the rear side of the front end portion 53 and protrude inwardly, and is spaced apart from the close contact portion 62. And the fixing jaw 64 is formed in the groove 26 of the brush holder 20 to prevent detachment of the ball 42 for fixing and holding the brush holder 20. And a settling groove 64 between the fixing jaw 64 so that the ball 42 is positioned when it is slid in the direction of the hand grinder 100.

On the other hand, the spring 44 is located along the outer circumference of the hollow 52 of the inner barrel 50 at the rear side of the fixing jaw 64 of the outer barrel 60, in order to prevent the spring 44 from being detached. A washer 46 and a stop ring 48 are fixedly coupled between the inner barrel 50 and the outer barrel 60.

As described above, referring to FIGS. 2A to 2C, the coupling process of the brush device 10 of the hand grinder according to the preferred embodiment of the present invention includes a ball 42 in the ball hole 51 of the inner barrel 50. The outer barrel 60 is positioned and inserted into the rear end to be in close contact with the front end 53. Thereafter, the spring 44 is positioned between the inner barrel 50 and the outer barrel 60, and the washer 46 and the stop ring 48 are coupled to prevent the spring 44 from escaping outward. Finally, the shaft 24 of the brush holder 20 is inserted into the hollow 52 at the front end of the inner barrel 50 while sliding the outer barrel 60 in the rear end, i.e., the direction in which the hand grinder 100 is engaged.

As such, the brush mechanism 10 of the hand grinder according to the preferred embodiment of the present invention is attached to and detached from the hand grinder 100 and the brush holder 20 by the coupling 40, and thus, the brush holder 20 and the hand grinder. There is an effect that the attachment and detachment of (100) can be made convenient. In addition, by configuring the outer barrel 60 of the coupling 40 to be slidable in the direction of the hand grinder 100, a safety accident such as preventing hand injury by the wire 110 when attaching or detaching the brush holder 20 is prevented. It is possible to reduce the risk of, and to be able to replace the brush holder 20 conveniently.

In particular, the protruding end 22 is formed in the brush holder 20, and the first space 54 is formed in the coupling 40 so as to correspond to the protruding end 22, and at the front end of the first space 54. By forming the second space 56 to allow the brush holder 20 to be seated, the coupling precision of the brush holder 20 and the coupling 40 may be increased to effectively reduce vibration received from the hand grinder 100 during use.

On the other hand, the hand grinder brush mechanism 10 according to a preferred embodiment of the present invention is a spring 120 is coupled to the inclined portion 36 of the brush holder 20, as shown in Figure 1, through the opening 32 The wire 110 is placed to be positioned in the hollow 32 of the brush holder 20, and the hand grinder 100 is screwed to the coupling portion 58 of the coupling 40.

Brush mechanism 10 of the hand grinder having such a configuration will be able to effectively reduce the fatigue of the operator by applying power to the hand grinder 100 to minimize the vibration during use.

4 is a view for explaining the process of coupling and detaching the brush mechanism 10 of the hand grinder according to an embodiment of the present invention, (a) is a state before the brush holder and the coupling is coupled, (b ) Is a diagram showing a combined state.

Referring to FIG. 4, the shaft 24 of the brush holder 20 is moved into the hollow 52 of the inner barrel 50 while sliding the outer barrel 60 of the coupling 40 in the direction in which the hand grinder 100 is engaged. Insert it into position At this time, the ball 42 located in the ball hole 51 formed on one side of the hollow 52 of the inner barrel 50 of the coupling 40 is placed in the settle groove 66 of the outer barrel 60. When the protruding end 22 of the brush holder 20 is positioned in the first space 54 of the inner barrel 50, when the outer barrel 60 is returned to its original state, the ball 42 has the outer barrel 60. It is positioned in the groove 26 formed in the shaft 24 of the brush holder 20 by the fixing jaw 64 of the brush holder 20 and the coupling 40 is fixed.

Meanwhile, the process of separating the brush holder 20 from the coupling 40 is performed by sliding the outer barrel 60 in the direction of the hand grinder 100 in the same manner as in the above-described coupling process. Just move in the direction.

As such, the brush mechanism 10 of the hand grinder according to the preferred embodiment of the present invention slides the outer barrel 60 of the coupling 40 in the direction in which the hand grinder 100 is engaged by the wire 110. Safety accidents such as injuring the hand can be prevented, and the brush holder 20 can be conveniently detached.

As described above, the brush mechanism of the hand grinder according to the preferred embodiment of the present invention is shown according to the above description and drawings, but this is merely an example and various changes within the scope without departing from the technical spirit of the present invention. And those skilled in the art will appreciate that changes are possible. For example, the present invention is a representative example of applying a wire, but by changing the assembly structure of the front of the brush holder can be applied to a brush to apply sandpaper heel, baby stone (autumn stone) and the like.

1 is a perspective view of a brush mechanism of a hand grinder according to a preferred embodiment of the present invention,

2a to 2c are combined perspective views of the brush mechanism of the hand grinder according to a preferred embodiment of the present invention,

Figure 3a is an exploded cross-sectional view of the brush mechanism of the hand grinder according to a preferred embodiment of the present invention,

Figure 3b is a cross-sectional view of the brush mechanism of the hand grinder according to a preferred embodiment of the present invention,

4 is a view for explaining the process of coupling and detaching the brush mechanism of the hand grinder according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: brush of the hand grinder 20: brush holder

22: protrusion end 24: shaft

26: groove 30: body

32: opening 34: (body) hollow

40 coupling 50 inner barrel

52: (inner barrel) hollow 54: first space

56: second space 60: outer barrel

100: hand grinder 110: wire

Claims (2)

The wire 110 is placed on one side, the brush holder 20 is formed with the shaft 24 on the other side, the shaft 24 of the brush holder 20 is inserted on one side, the hand grinder 100 on the other side In the brush mechanism of the hand grinder is coupled to include a coupling 40 for convenient attachment and detachment of the brush holder 20, The brush holder 20 has an opening 32 at one side thereof and a hollow 34 formed therein; A protruding end 22 having an outer diameter smaller than the outer diameter of the body 30 on the other side of the body 30 and protruding in a direction opposite to the opening 32; A shaft (24) protruding from the protruding end (22) and having a recess (26) and coupled to the coupling (40); The coupling 40 is formed so that the rear end is coupled to the hand grinder 100, the hollow 52 which is inserted into the shaft 24 of the brush holder 20 is inserted into the front end is formed in the front end, the front end The first space 54 is formed in communication with the hollow 52 from the protruding end 22 of the brush holder 20, the front side of the body 30 in front of the first space 54 An inner barrel 50 in which the second space 56 to be inserted is formed; Brush mechanism of the hand grinder, characterized in that it comprises an outer barrel (60) which is slidably coupled to the outer circumference of the inner barrel (50) to detach the brush holder (20). The method of claim 1, The brush mechanism of the hand grinder, characterized in that the shaft 24 of the brush holder 20 has a hexagonal cross section.

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