KR102540973B1 - Polishing pad and grinder holder for mounting it - Google Patents

Abstract

The present invention discloses a polishing pad and a grinder holder for mounting the polishing pad. Specifically, the polishing pad has a circular disk shape, an abrasive member coated with an abrasive material, and a polishing wheel coupled to the center of the polishing member to support the polishing member and having a mounting hole at the center for attaching and detaching to the rotating shaft of the grinder. In the polishing pad made of, the inner circumferential surface of the mounting hole is characterized in that arc-shaped arc portions are formed along the circumference at equal intervals, and straight-shaped edges are formed at equal intervals between the arc portions, and the polishing pad is mounted The holder for the grinder has a cross section corresponding to the mounting hole so as to be fitted and inserted into the mounting hole, a main body having a fixing hole formed in the center and a spring groove formed on an upper surface; A locking body having a shape corresponding to the body, having an assembly hole formed in the center, and a locking hole formed on one side; a compression spring inserted into the spring groove; a stopper provided at an upper end of the compression spring, elastically supported, and protruding from an upper surface of the main body; a locking release button that is movably inserted into the locking hole; A fixing nut having a hollow shape and rotatably inserted into and passing through the assembly hole and the fixing hole and fastened to the rotating shaft to be coupled to the main body, and when the locking body is rotated in one direction, the rim of the locking body is formed. Is caught on the edge of the mounting hole and the upper end of the stopper pushes the unlocking button and is caught in a state of entering the locking hole, characterized in that it can block the rotation of the locking body.

Description

Polishing pad and grinder holder for mounting it}

The present invention relates to an abrasive pad and a grinder holder for mounting the abrasive pad, and more particularly, to an abrasive pad mounted on a rotary shaft of a grinder to polish a workpiece, and mounting of a polishing pad capable of attaching or detaching the polishing pad to the rotary shaft of a grinder. It is about a grinder holder for the dragon.

In general, a grinder generates rotational power by a motor or air pressure, transmits the generated rotational force to a rotational shaft formed on one side of the grinder, and an abrasive tool such as an abrasive disc or polishing pad or a circular cutter is coupled to the rotational shaft to grind the surface of a workpiece. It is used for cutting or cutting.

The grinder can be divided into a fixed grinder that grinds a large amount of workpieces in a fixed position and a portable grinder that can be moved to various places and can be carried and moved to process small and small workpieces.

Recently, a convenient portable grinder is widely used, and when the portable grinder is used for a certain period of time, the abrasive tool wears out and needs to be replaced. Also, from time to time, abrasive tools of different sizes or types are replaced.

In relation to such a hand grinder, the technology shown in Korean Utility Model Registration No. 0356304 is to insert a head on which an abrasive plate is mounted into the rotating shaft of the grinder and fix or separate it by a fastening member such as a fixing nut, This is inconvenient to repeat the process of tightening or loosening the fixing nut using a separate tool such as a spanner, and it takes unnecessary time due to the replacement of the abrasive plate, and it is moved to a place where it can be replaced when working in a small space or at high altitude. The continuity of work, such as doing so, was difficult and became a factor that lowered work efficiency.

In addition, in consideration of the above points, in Registered Utility Model No. 0373648 or 0376952, a sleeve that moves in the axial direction is mounted on the circumference of the coupler, and a locking ball is ejected and detached by one-touch method to remove and mount the grinding tool. A structure is disclosed to enable this.

However, in the case of this conventional method, since the locking ball has a structure in which it protrudes from the groove formed at the end of the abrasive tool, a vibration phenomenon occurs in the abrasive tool rotating at high speed during the grinding operation.

In addition, when working with a grinder, there is no problem in grinding on a generally flat surface, but on a curved surface or corner with a curve, vibration is transmitted to the spring and the abrasive tool vibrates, resulting in a decrease in work efficiency.

In addition, since it is a structure that maintains adhesion with the coupler by relying on three protrusions formed on the circumference of the abrasive tool, power transmission is not properly performed when a certain amount of force is applied, as well as binding force due to friction or micro-vibration. It has the drawback of causing great psychological anxiety to the worker when it falls off.

In order to solve this problem, there is a Korean Registered Patent No. 10-2037521 (2019.10.22.) "Grinder holder capable of attaching and detaching a polishing pad with one touch" applied for and registered by the present applicant.

Although the above patent has solved most of the conventional problems, since the actual abrasive tool rotates at high speed, there is a risk that the mounted abrasive tool may be separated, the structure is complicated, and the installation or detachment process is cumbersome, which is inconvenient for the operator. There was a problem.

Republic of Korea Patent Publication 10-2019-0027506 (2019.3.15.) "Hand grinder" Korean Registered Patent No. 10-1892966 (2018.8.23.) "Abrasive tool mounting unit" Republic of Korea Patent Publication 10-2009-0006995 (2009.1.16.) "Tool port locking device of automatic tool changer" Korean Registered Patent No. 10-2037521 (2019.10.22.) "Grinder holder capable of attaching and detaching polishing pad with one touch"

Accordingly, the present invention is to solve the above problems, and an object of the present invention is to provide a polishing pad and a grinder holder for mounting the polishing pad, which have a simple structure and are easy to attach and detach from the polishing pad.

In order to achieve the above object, the polishing pad according to the present invention is coupled to a polishing member formed in a circular disk shape and coated with an abrasive material, and is coupled to the center of the polishing member to support the polishing member and is attached and detached from a rotary shaft of a grinder at the center. In the abrasive pad consisting of a polishing wheel with mounting holes that can be formed, on the inner circumferential surface of the mounting holes, circular arc portions are formed at equal intervals along the circumference, and linear edges are formed at equal intervals between the arc portions. do.

Here, the bow part may be formed to be convex inward.

A grinder holder for mounting a polishing pad according to another embodiment of the present invention is a grinder holder fixed to a rotary shaft of a grinder so that a polishing pad having a central mounting hole can be attached to and detached from the rotary shaft of the grinder, and is inserted into the mounting hole. A main body having a cross section corresponding to the mounting hole, a fixing hole formed in the center, and a spring groove formed on an upper surface; A locking body having a shape corresponding to the body, having an assembly hole formed in the center, and a locking hole formed on one side; a compression spring inserted into the spring groove; a stopper provided at an upper end of the compression spring, elastically supported, and protruding from an upper surface of the main body; a locking release button that is movably inserted into the locking hole; A fixing nut having a hollow shape and rotatably inserted into and passing through the assembly hole and the fixing hole and fastened to the rotating shaft to be coupled to the main body, and when the locking body is rotated in one direction, the rim of the locking body is formed. Is caught on the edge of the mounting hole and the upper end of the stopper pushes the unlocking button and is caught in a state of entering the locking hole to block rotation of the locking body.

A grinder holder for mounting a polishing pad according to another embodiment of the present invention is a grinder holder fixed to a rotating shaft of a grinder so that a polishing pad having a central mounting hole can be attached to and detached from the rotating shaft of the grinder, and is fitted to the mounting hole. A main body having a cross section corresponding to the mounting hole to be inserted, a fixing hole formed in the center, a hollow assembly tube formed along the circumference of the fixing hole, and a spring groove formed on an upper surface; A locking body having a shape corresponding to the main body, an assembly hole into which the assembly pipe can be fitted at the center, and a locking hole formed on one side; a compression spring inserted into the spring groove; a stopper provided at an upper end of the compression spring, elastically supported, and protruding from an upper surface of the main body; a locking release button that is movably inserted into the locking hole; and a fixing nut that has a hollow shape and is threaded with an end of the rotating shaft passing through the fixing hole, the assembly tube, and the assembly hole. When the locking body is rotated in one direction, the rim of the locking body is mounted on It is caught on the edge of the hole and the upper end of the stopper pushes the unlocking button and is caught while entering the locking hole to block rotation of the locking body.

At this time, an O-ring groove is formed on an outer circumferential surface of the assembly pipe, and an O-ring is installed in the O-ring groove so that the assembly pipe can be forcibly fitted into the assembly hole.

In addition, one or more bearing grooves are formed around the fixing hole on the upper surface of the main body, and ball bearings may be inserted and accommodated in each of the bearing grooves.

In addition, an arc-shaped guide groove may be formed on one side of an upper surface of the main body, and a guide protrusion guided by being inserted into the guide groove may be formed on a lower surface of the locking body.

In addition, a locking jaw may be formed at an upper portion of the locking hole to prevent separation of the unlocking button and to expose only a portion of the locking release button.

According to the present invention described above, the structure is simple compared to the prior art, and the mounting or detaching of the polishing pad is very easy.

That is, when the locking body is rotated forward by a certain angle with a finger, locking is easily performed while the stopper is caught in the locking hole, and when the locking body is reversely rotated while pressing the unlocking button, locking is easily released.

Also, even when the polishing pad rotates at high speed, the mounting hole of the polishing pad can be maintained at the apex of the locking body, so that the polishing pad can never be separated.

In addition, since the main body and the locking body can be maintained in an assembled state using an O-ring, there is no risk of loss during transport, transportation, and management, and the polishing pad can be mounted quickly.

1 is a perspective view showing the appearance of a polishing pad according to an embodiment of the present invention;
Figure 2 is a plan view showing various embodiments of the polishing wheel of the polishing pad shown in Figure 1
3 is a perspective view showing a grinder holder for mounting a polishing pad according to another embodiment of the present invention;
Figure 4 is an exploded perspective view of the present invention shown in Figure 3
Figure 5 is a cross-sectional view of the present invention shown in Figure 3
Figure 6 is an operating state diagram of the present invention shown in Figure 3
7 is a perspective view showing a grinder holder for mounting a polishing pad according to another embodiment of the present invention;
Figure 8 is an exploded perspective view of the present invention shown in Figure 7
Figure 9 is a cross-sectional view of the present invention shown in Figure 7;
10 is a state diagram in which the polishing pad is mounted to the present invention shown in FIG.

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. And, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

1 is a perspective view showing the appearance of a polishing pad according to an embodiment of the present invention, and FIG. 2 is a plan view showing various embodiments of a polishing wheel of the polishing pad shown in FIG. 1 .

In the present invention, the polishing pad refers to an abrasive tool mounted on a grinder holder to grind, cut, or cut a workpiece, and is a term encompassing an abrasive disc, a cutting pad, a cutting blade, a circular saw, and the like.

The polishing pad 10 according to the present invention may be composed of a polishing member 11 and a polishing wheel 12.

The abrasive member 11 has a circular disk shape, and a coupling hole into which the abrasive wheel 12 can be coupled is formed in the center.

The abrasive member 11 may be applied or coated with an abrasive, and in the case of a cutter, it may have a structure in which teeth are formed along an edge.

The polishing wheel 12 is coupled to the center of the polishing member 11 .

The abrasive wheel 12 supports the abrasive member 11 and has a mounting hole 13 formed in the center thereof so that it can be attached to or detached from the rotary shaft s of the grinder.

And the polishing wheel 12 may be made of metal or resin material.

At this time, the mounting hole 13 may have a structure in which the circular arc portion 14 and the straight edge portion 15 are alternately formed along the circumference.

In other words, the circular arc portion 14 is like a fan-shaped arc, and the side portion 15 is like a fan-shaped string. The arc portion 14 and the side portion 15 are formed at equal intervals, respectively.

Therefore, as shown in FIG. 2(a), the mounting hole 13 may have a shape in which a vertex portion of a polygon is rounded or a shape obtained by cutting a portion of a circumference at equal intervals.

For example, three circular arc portions 14 and three side portions 15 may be formed to have a substantially hexagonal shape, or four circular arc portions 14 and four side portions 15 may be formed to have a substantially octagonal shape.

As another embodiment, as shown in FIG. 2 (b), the side portion 15 of the mounting hole 13 may have a structure formed convex inward instead of being straight.

That is, the string portion 15 may have an inwardly convex arc shape.

This allows the abrasive wheel 12 to be stably seated on the main body 100 while the string portion 15 is caught on the sleeve 150 of the main body, which will be described later.

Next, another embodiment of the present invention will be described. Figure 3 is a perspective view showing a grinder holder for mounting a polishing pad according to another embodiment of the present invention, Figure 4 is an exploded perspective view of the present invention shown in Figure 3, Figure 5 is a cross-sectional view of the present invention shown in Figure 3 indicate

In the grinder holder for mounting the polishing pad according to another embodiment of the present invention, since it is difficult to directly couple and fix the polishing pad to the rotating shaft of a power tool such as a grinder or a polishing machine, it is attached to the rotating shaft to store consumables such as a polishing pad or polishing disk. It is a device such as an adapter or coupler that facilitates attachment or detachment.

The present invention may largely include a main body 100, a locking body 200, a compression spring 300, a stopper 400, an unlocking button 500, and a fixing nut 700.

First, the main body 100 will be described.

The main body 100 has a constant thickness and a shape corresponding to the shape of the mounting hole 13 . This is so that the main body 100 can be fitted and inserted into the mounting hole 13 .

That is, the main body 100 may be formed in a substantially polygonal shape, and each vertex portion 100a may be rounded to have a polygonal shape as a whole. In other words, it may be a shape in which a portion of a circumference is cut to form a side portion 100b such as a polygonal side.

The illustrated embodiment may be formed in a triangular shape, and the three vertices 100a may be rounded to have a hexagonal shape as a whole. Alternatively, it may have a shape in which an arc-shaped vertex portion 100a and a string-shaped edge portion 100b are alternately formed.

A fixing hole 110 is formed in the center of the body 100 .

The fixing hole 110 is formed through as a space into which the fixing nut 700 to be described later is fitted.

In addition, a spring groove 120 in which a compression spring 300 to be described later can be accommodated is formed on the upper surface of the main body 100. The spring groove 120 is formed to be spaced apart from the outside of the fixing hole 110 .

On the other hand, it is preferable that one or more bearing grooves 130 are formed on the upper surface of the main body 100 .

The bearing grooves 130 may have a recessed sphere or hemispherical shape, and may be radially arranged around the fixing hole 110 and formed at equal intervals.

Ball bearings 600 are inserted into the bearing grooves 130, respectively, and only a part of the upper end of the ball bearings 600 is accommodated so as to protrude from the upper surface of the main body 100.

Accordingly, the lower surface of the locking body 200 in close contact with the upper surface of the main body 100 may roll in contact with the ball bearing 600 .

For reference, it is preferable that three bearing grooves 130 are formed in an equilateral triangle at intervals of 120° at three points where the apex portion 100a and the edge portion 100b meet.

At this time, it is preferable that the spring groove 120 is formed to be adjacent to one side of any one of the bearing grooves 130 .

In addition, an arc-shaped guide groove 140 is formed between any two bearing grooves 130 among the bearing grooves 130, as shown.

The guide groove 140 guides a rotational path with a guide protrusion 240 formed on the lower surface of the locking body 200 to be described later inserted.

Meanwhile, a sleeve 150 extending outwardly is formed at each apex portion 100a of the main body 100 . When the polishing pad 10 is mounted on the main body 100, the sleeve 150 functions as a step on which the edge of the mounting hole 13 of the polishing pad 10, that is, the bow part 15 can be seated. . That is, the polishing wheel 12 is caught on the main body 100 .

Next, the locking body 200 will be described.

The locking body 200 locks the polishing pad 10 so that it does not separate from the state in which it is mounted on the main body 100, and can rotate while being in close contact with the upper surface of the main body 100 as shown. are provided

The shape of the locking body 200 also forms a shape corresponding to the shape of the mounting hole 13. That is, as in the main body 100, it has a polygonal shape in which a vertex portion 200a and an edge portion 200b are formed while having a constant thickness as a whole, and the apex portion 200a may be formed in a round shape.

An assembly hole 210 is formed through the center of the locking body 200 .

And one side of the locking body 200, in other words, a locking hole 220 is formed between the assembly hole 210 and any one vertex portion 200a. The locking hole 220 has a shape penetrating vertically, and a locking jaw 230 is formed at the top.

The locking jaw 230 exposes a part of the top of the unlocking button 500 while preventing the unlocking button 500 inserted into the locking hole 220 from escaping upward, so that the operator can use the unlocking button ( 500) to be pressed.

On the other hand, a guide protrusion 240 protrudes from the lower surface of the locking body 200.

As described above, the guide protrusion 240 reciprocates only within a certain angular range, that is, within the angular range of the guide groove 140 when the locking body 200 rotates while being inserted into the guide groove 140. Guided to turn

It is preferable that a pressing portion 250 formed concavely is formed at each vertex of the locking body 200. The pressing part 250 is easy for the operator to rotate the locking body 200 with a finger.

At this time, by forming the locking hole 220 in the pressing part 250, the operator can rotate the locking body 200 while pressing the unlocking button 500 accommodated in the locking hole 220 with a finger. .

Next, the compression spring 300 and the stopper 400 will be described.

The compression spring 300 is inserted into the spring groove 120.

In addition, the stopper 400 is also elastically supported by the compression spring 300 while being inserted into the spring groove 120 .

The stopper 400 is formed to have the same cross section as the spring groove 120, is fitted and inserted, moves to slide up and down, and may have a structure in which an accommodation space is formed therein so as to cover the top of the compression spring 300. .

At this time, the stopper 400 is installed so that a part of the upper end protrudes above the upper surface of the main body 100 when there is no external force.

Next, the unlocking button 500 is accommodated inside the locking hole 220 and has a block shape that can be moved up and down.

It is provided to have the same cross section as the cross section of the locking hole 220, and the upper end is caught on the locking jaw 230, but a part is exposed to the outside.

Also, it is preferable that a rounded portion 610 is formed on the lower surface of the unlocking button 500. This is because, when the locking body 200 rotates, the stopper 400 slides to the lower surface of the unlocking button 500 to enter and push the unlocking button 500 up easily.

For reference, the length of the unlocking button 500 is shorter than the depth of the locking hole 220 so that the unlocking button 500 can move up and down inside the locking hole 220 .

Next, the fixing nut 700 will be described.

The fixing nut 700 is configured to be fastened to a rotary weight of the grinder while supporting the locking body 200 so as to be rotatable with respect to the main body 100 .

The fixing nut 700 passes through the assembly hole 210 and is inserted into and coupled to the fixing hole 110 .

That is, the locking body 200 is rotatably coupled to the fixing nut 700, and the main body 100 may be fitted or screwed to the fixing nut 700.

In addition, the fixing nut 700 is made of a hollow shape and a grinder rotating shaft can be inserted therein. A female thread may be formed on an inner circumferential surface of the fixing nut 700 and a male thread may be formed on an outer circumferential surface of the grinder rotating shaft so that the grinder rotating shaft is inserted into and fastened to the fixing nut 700 .

Here, it is preferable that a cap 710 is coupled to an upper end of the fixing nut 700 and a seating step 211 on which the cap 710 can be seated is formed inside the assembly hole 210 .

Hereinafter, the operating process of the present invention will be described with reference to FIG. 6 . Figure 6 shows an operating state diagram of the present invention shown in Figure 3.

First, in the initial state of the present invention before mounting the polishing pad 10, as shown in FIG. 6(a), the main body 100 and the locking body 200 are overlapped in a symmetrical state. In other words, the apex portion 100a and the side portion 100b of the main body 100 are positioned to correspond to the apex portion 200a and the side portion 200b of the locking body 200, respectively.

At this time, the stopper 400 and the unlocking button 500 are spaced apart from each other. So, the stopper 400 does not protrude by the lower surface of the locking body 200 and maintains a state completely inserted into the spring groove 120. That is, the compression spring 300 is in a compressed state.

And, the guide protrusion 240 is located at one end of the guide groove 140 .

To mount the polishing pad 10 in this state, the locking body 200 and the main body 100 are fitted so as to be inserted into the mounting hole 13 of the polishing pad 10 . At this time, since the main body 100 is accommodated in the mounting hole 13 and the side part 15 of the mounting hole 13 is caught and seated on the sleeve 150, the main body 100 is attached to the mounting hole 13. ) does not pass.

In addition, the locking body 200 protrudes from the upper surface of the mounting hole 13 .

In this state, the fixing nut 700 is inserted into the assembly hole and the fixing hole and rotated to engage and fix the rotation shaft.

Next, referring to FIG. 6(b), a process in which a worker rotates the locking body 200 to lock the polishing pad 10 will be described.

The operator presses the pressing part 250 with a finger and rotates the locking body 200.

The locking body 200 rotates around the fixing nut 700, and the guide protrusion 240 moves along the guide groove 140.

Here, when the locking body 200 continues to rotate and the locking hole 220 and the unlocking button 500 reach the stopper 400, the upper end of the stopper 400 is at the top of the unlocking button 500. It slides along the rounding portion 610 .

And, when the stopper 400 and the unlocking button 500 are located on the same vertical line, the stopper 400 rises due to the elasticity of the compression spring 300, and the rising stopper 400 causes the locking While pushing the release button 500 up, it enters the inside of the locking hole 220. At this time, the locking release button 500 rises but is caught on the locking jaw 230 and a part of the upper end is exposed to the top of the locking hole 220 (see FIG. 5).

Here, the guide protrusion 240 may move to the other side of the guide groove 140 to restrict the locking body 200 from further rotating.

When the stopper 400 enters the locking hole 220, the locking body 200 is caught by the stopper 400 and is no longer rotated, and the apex portion 200a of the locking body 200 is Since it is positioned on the side portion 100b of the main body 100, the polishing pad 10 is completely locked and fixed. That is, the edge of the mounting hole 13 is caught on the apex portion 200a of the locking body 200 .

If the unlocking button 500 exposed to release locking is pressed, the unlocking button 500 descends, and the lowered unlocking button 500 causes the stopper 400 to descend.

As the stopper 400 descends, the stopper 400 comes out of the locking hole 220 and is accommodated in the spring groove 120 again.

In this state, since the locking body 200 is rotatable, when the locking body 200 is rotated, it returns to the initial state as shown in FIG. ) can be removed.

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 7 to 10 . 7 is a perspective view showing a grinder holder for mounting a polishing pad according to another embodiment of the present invention, FIG. 8 is an exploded perspective view of the present invention shown in FIG. 7, and FIG. 9 is a cross-sectional view of the present invention shown in FIG. , and FIG. 10 is a state diagram showing a state in which the polishing pad is attached to the present invention shown in FIG. 7 .

Referring to another embodiment of the present invention as shown, the main body 100, the locking body 200, the compression spring 300, the stopper 400, the unlocking button 500, the fixing nut 700 and the O-ring It may be configured to include (800).

The main body 100 has a shape corresponding to the cross section of the mounting hole 13 so as to be fitted and inserted into the mounting hole 13 .

Specifically, a convex portion 100c similar to the above-described vertex portion 100a and a concave portion 100d similar to the edge portion 100b may be formed to have a substantially polygonal shape.

At this time, the concave portion 100d may have a structure formed concave inward instead of being straight. With such a concave structure, the concave side portion 15 of the mounting hole 13 is better seated and can be easily caught on the sleeve 150 .

In addition, a fixing hole 110 is formed in the center of the main body 100, and an assembly pipe 160 protruding upward along the circumference of the fixing hole 110 is formed. The assembly pipe 160 is made of a hollow shape, so that the rotary shaft s of the grinder can pass therethrough.

Here, a concave O-ring groove 161 is formed on the outer circumferential surface of the assembly pipe 160.

In addition, the spring groove 120 is formed on the upper surface of the main body 100, one or more bearing grooves 130 in which the ball bearing 600 can be accommodated are formed, and an arc-shaped guide groove 140 is also formed. It can be.

Since the spring groove 120, the bearing groove 130, and the guide groove 140 are substantially the same as those described above, a detailed description thereof will be omitted.

In addition, a sleeve 150 extending outwardly is formed on each side of the main body 100 . When the side portion 100b has an inwardly concave shape, the area of the sleeve 150 increases so that it is easily caught on the side portion 15 of the mounting hole 13.

Next, the locking body 200 will be described.

The locking body 200 has a shape corresponding to the body 100 and is rotatably provided in close contact with the upper surface of the body 100 .

The locking body 200 may also have a polygonal shape in which convex portions 200c and concave portions 200d are alternately formed.

In addition, an assembly hole 210 into which the assembly pipe 160 is inserted and coupled is formed at the center of the locking body 200 . A seating jaw 211 is formed on the upper inner circumferential surface of the assembly hole 210 .

Importantly, it is preferable that an O-ring 800, which will be described later, be accommodated and seated on the lower side of the seating protrusion 211.

In addition, a locking hole 220 penetrating vertically is formed in any one vertex portion 200a of the locking body 200, and a locking jaw 230 may be formed at an upper end of the locking hole 220.

Alternatively, as shown, the locking jaw 230 may be formed in the middle of the locking hole 220 and may have a structure in which the lower end of the unlocking button 500 can be hung.

In addition, the guide protrusion 240 protrudes from the lower surface of the locking body 200 and guides and limits the rotation of the locking body 200 while being inserted into the guide groove 140 .

Preferably, a concave pressing portion 250 is formed on one of the apex portions 200a, particularly the apex portion 200a formed in the locking hole 220.

Next, the compression spring 300, the stopper 400, and the unlocking button 500 will be described.

The compression spring 300 and the stopper 400 are inserted into the spring groove 120 .

The stopper 400 moves up and down along the spring groove 120 while being elastically supported by the compression spring 300 .

The unlocking button 500 is accommodated in the locking hole 220 and moves up and down. A rounded portion may be formed on a lower surface of the unlocking button 500 . In addition, the upper end of the locking release button 500 is caught on the locking jaw 230 and does not escape to the outside of the locking hole 220 .

Next, the fixing nut 700 will be described.

The fixing nut 700 has a hollow shape and a female thread is formed on an inner circumferential surface thereof so that it can be screwed into the rotary shaft s.

The upper portion of the fixing nut 700 is formed with a hexagonal head portion 720 in the shape of a hexagonal nut, and the lower portion is formed in a circular plate shape and can be seated on the seating jaw of the locking body 200.

Therefore, when the fixing nut 700 is tightened by fastening the rotating shaft s of the grinder exposed through the assembly hole 210, the present invention can be firmly fixed to the rotating shaft s of the grinder.

In the present invention, the O-ring 800 is inserted and installed into the O-ring groove 161.

The O-ring 800 may be made of various materials such as resin, metal, and rubber, and has some elasticity.

And it is interposed in the O-ring groove 161 to prevent the locking body 200 from being separated from the main body. That is, the main body 100 and the locking body 200 are maintained in an assembled state.

To this end, the outer diameter of the O-ring 800 is preferably larger than the outer diameter of the assembly pipe 160 and larger than the inner diameter of the fixing hole 110 .

Therefore, when assembling the locking body 200 to the main body, when the assembly tube 160 is fitted into the fixing hole 110, the inner diameter of the fixing hole 110 is caught by the O-ring 800, but When force is applied to force the fitting, the inner diameter is reduced by the elasticity of the O-ring 800, and the assembly tube 160 is fitted into the fixing hole 110.

When fitting is completed, the O-ring 800 is accommodated in the space formed between the O-ring jaw 212 and the O-ring groove 161 .

After all, the locking body 200 is caught by the O-ring 800 and is prevented from being separated from the main body 100, so that the assembled state can be maintained.

Representative embodiments of the present invention have been described above with reference to the drawings, but those skilled in the art will be able to make various applications and modifications within the scope of the present invention based on the above information. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, but should be defined by not only the claims to be described later, but also those equivalent to these claims.

10: polishing pad 11: polishing member
12: polishing wheel 13: mounting hole
14: arc part 15: bow part
100: main body 100a: vertex part
100b: edge portion 100c: convex portion
100d: concave portion 110: fixing hole
120: spring home 130: bearing home
140: guide groove 150: sleeve
160: assembly pipe 161: O-ring home
200: locking body 200a: vertex
200b: edge 200c: convex portion
200d: concave portion 210: assembly hole
211: seating jaw 212: oring jaw
220: locking hole 230: locking jaw
240: guide protrusion 250: pressing part
300: compression spring
400: stopper
500: locking release button 510: rounding part
600: ball bearing
700: fixing nut
710: cap 720: hexagon head
800: O-ring
s: grinder axis of rotation

Claims (8)

An abrasive member formed in the shape of a circular disk and coated with an abrasive material, a main body having a cross section corresponding to the mounting hole, a fixing hole formed in the center, and a spring groove formed on the upper surface thereof so as to be fitted into the mounting hole, the main body A locking body having a shape corresponding to and having an assembly hole formed in the center and a locking hole formed on one side, a compression spring inserted into the spring groove, and provided at an upper end of the compression spring to be elastically supported and an upper surface of the main body. A stopper protruding from the stopper, a locking release button movably inserted into the locking hole, and a fixing nut formed in a hollow shape and rotatably inserted into the assembly hole and the fixing hole, and fastened to the rotating shaft while passing through to be coupled to the main body. When the locking body is rotated in one direction in a state in which the main body and the locking body are overlapped in a symmetrical state with each other, the rim of the locking body is caught on the edge of the mounting hole, and the top of the stopper pushes the locking release button while locking The center of the polishing member is coupled to the grinder holder for mounting the polishing pad, characterized in that it is caught in the state of entering the hole and can block the rotation of the locking body, thereby attaching and detaching the polishing member to the grinder holder. In the polishing pad formed and made of a polishing wheel,
The inner circumferential surface of the mounting hole,
The arc portion of the arc shape is formed at equal intervals along the circumference,
The polishing pad, characterized in that the chamfers convex inward between the circular arcs are formed at regular intervals. delete In the grinder holder fixed to the rotating shaft so that the polishing pad having a mounting hole in the center can be attached to and detached from the rotating shaft of the grinder,
A main body having a cross section corresponding to the mounting hole so as to be fitted into the mounting hole, a fixing hole formed in the center, and a spring groove formed on an upper surface;
A locking body having a shape corresponding to the body, having an assembly hole formed in the center, and a locking hole formed on one side;
a compression spring inserted into the spring groove;
a stopper provided at an upper end of the compression spring, elastically supported, and protruding from an upper surface of the main body;
a locking release button that is movably inserted into the locking hole;
A fixing nut that has a hollow shape and is rotatably inserted into the assembly hole and the fixing hole and coupled to the main body by being fastened to the rotating shaft while penetrating,
When the locking body is rotated in one direction, the rim of the locking body is caught on the edge of the mounting hole and the upper end of the stopper is caught while entering the locking hole while pushing the unlocking button to block rotation of the locking body Grinder holder for mounting the polishing pad, characterized in that. In the grinder holder fixed to the rotating shaft so that the polishing pad having a mounting hole in the center can be attached to and detached from the rotating shaft of the grinder,
A main body having a cross section corresponding to the mounting hole so as to be fitted into the mounting hole, a fixing hole formed in the center, a hollow assembly tube formed along the circumference of the fixing hole, and a spring groove formed on the upper surface. ;
A locking body having a shape corresponding to the main body, an assembly hole into which the assembly pipe can be fitted at the center, and a locking hole formed on one side;
a compression spring inserted into the spring groove;
a stopper provided at an upper end of the compression spring, elastically supported, and protruding from an upper surface of the main body;
a locking release button that is movably inserted into the locking hole; and
A fixing nut that has a hollow shape and is screwed with the end of the rotation shaft passing through the fixing hole, the assembly tube, and the assembly hole;
When the locking body is rotated in one direction, the rim of the locking body is caught on the edge of the mounting hole and the upper end of the stopper is caught while entering the locking hole while pushing the unlocking button to block rotation of the locking body Grinder holder for mounting the polishing pad, characterized in that. According to claim 3,
A grinder holder for mounting a polishing pad, characterized in that an O-ring groove is formed on an outer circumferential surface of the assembly pipe, and an O-ring is installed in the O-ring groove so that the assembly pipe is forcibly fitted into the assembly hole. According to any one of claims 3 or 5,
The grinder holder for mounting the polishing pad, characterized in that one or more bearing grooves are formed on the upper surface of the main body around the fixing hole, and ball bearings are inserted and accommodated in each of the bearing grooves. According to any one of claims 3 or 5,
An arc-shaped guide groove is formed on one side of the upper surface of the main body, and a guide protrusion inserted into and guided by the guide groove is formed on the lower surface of the locking body. According to any one of claims 3 or 5,
The grinder holder for mounting the polishing pad, characterized in that the upper part of the locking hole is formed with a locking jaw so that only a part is exposed while preventing the release of the locking release button.

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