KR100973157B1 - Disk Holder Removal Device of Hand Grinder - Google Patents

Abstract

The present invention is configured to attach or remove the disk-integrated disk holder, which is used for the purpose of finishing, cutting or cutting the surface of the object by binding on the rotating shaft of the hand grinder, as well as the safety key. The disk holder detachable device of the hand grinder which can prevent the phenomenon of the disk holder is released by the operation of the.

The present invention includes a grinder main body provided with a rotating shaft which operates at high speed by electric motor drive or air pressure, and a binding member fastened on the rotating shaft of the grinder main body, and at the same time in a receiving groove formed at both sides of the central through hole. A power linkage unit including a stopper on which the safety key is mounted, and a housing seated on the stopper to operate the safety key in a horizontal direction, and by a locking jaw formed on an outer circumferential surface of the binding member constituting the power linkage unit. At the same time, the removable key is provided with a recess in which the safety key is filled, and a disk holder is inserted and fixed to the top of the body.

Hand Grinder, Disc, Power Link Unit, Disc Holder, Safety Key

Description

Disk holder removal device of hand grinder {ATTACHABLE DEVICE FOR HAND GRINDING DISK HOLDER}

The present invention is configured to attach or detach a disk-integrated disk holder used for the purpose of finishing, cutting or cutting the surface of an object by binding on a rotating shaft of a hand grinder. Of course, the disk holder detachable device of the hand grinder which can prevent the disk holder from being released by the operation of the safety key in advance.

In general, hand grinders used in industrial machinery, shipbuilding, and various devices are mainly used for smoothing rough surfaces or parts to be painted on primary machined parts, or primary tools such as pipes, angles, and steel plates. It is used for the purpose of partially cutting and cutting raw materials.

That is, the hand grinder operates the rotating shaft at high speed by the air pressure generated by the electric motor drive or the operation of the compressor, and is made of stone, metal, etc. by the disk mounted on the rotating shaft. It is common to finish the work by polishing the surface of the object made of a polished or polished or less-cut parts, edges, etc., or cutting and cutting.

As a structure for fastening the disk to the rotating shaft of the hand grinder, as shown in Korean Utility Model Publication No. 89-10365 or 96-26826, the disk is fitted to the rotating shaft mounted in the grinder body and then fixed by using a nut. In order to fix or to fasten the bolt to the rotating shaft to use the method to fix the disk.

Therefore, in such a structure, simply tightening the disk to the grinder main body by bolts or nuts, the fastening force is reduced by the frictional force or the micro vibration of the disk rotating at high speed, causing psychological anxiety to the worker, substantially during the operation In case of unwinding causing a safety accident, a separate cover is installed around the disk.

In addition, when the disc is replaced due to the long time use of the hand grinder, foreign matter sticks to the bolt or nut and becomes hard, which makes the bolt or nut fastening work difficult and the binding state is not complete, which may cause a safety accident. Doing.

In consideration of these problems, the present applicant binds the disk-integrated disk holder by screwing it through a fixed holder on the rotary shaft of the grinder, as in Korean patent application 10-2008-0000254 (filed Jan. 02, 2008). The present invention has suggested a hand grinder which can prevent the disk from being released from the fixing holder and can easily and quickly detach the disk through the brake unit installed in the grinder body.

However, in the above structure, since the disc holder is to be fastened to the fixed holder on the rotating shaft by screwing, it is a hassle to release or refasten the disc holder during the work and of course, a separate brake unit must be operated. It was very uncomfortable for the workers.

The present invention has been repeatedly developed to improve the problems as described above, the object of the present invention is to provide a simple one-touch method for the disk holder mounted on the rotary shaft of the grinder body, so that the The present invention provides a disc holder detachment device for a hand grinder which can be detached more easily and at the same time prevents the disc holder from being released by the operation of a safety key mounted in the stopper.

The present invention for achieving the above object is provided with a grinder main body having a rotary shaft that operates at high speed by an electric motor drive or air pressure, and a binding member fastened on the rotary shaft of the grinder body; At the same time, a power linking unit comprising a stopper mounted with safety keys in the receiving grooves formed at both sides of the central hole, and a housing seated on the stopper to operate the safety key in a horizontal direction, and the power linking unit. It is possible to attach and detach by a locking step formed on the outer peripheral surface of the binding member and at the same time having a recess filled with the safety key is characterized in that the disk holder is fixed to the disk is inserted into the top of the body.

In addition, the bottom surface of the flange constituting the housing is formed with a rectangular guide groove is fitted into the safety key mounted in the receiving groove on the stopper, the insertion groove is formed in the body of the lower end of the flange is assembled into the hole of the stopper housing It is characterized in that it is configured to be bound by a fixing ring.

In addition, a ball plunger is provided on both sides of the upper surface of the flange, and the housing is configured to be rotated intimately on the stopper, and the ball bruncher is mounted with a steel ball and a spring into insertion holes formed on both sides of the upper surface of the flange. Characterized in that the fastening screw is configured.

According to the present invention, the disc holder, in which the disc is integrally fixed by each of the above-described features, can be detached in a one-touch manner through the binding member in the power linkage unit. Therefore, the disc is a consumable for grinding, cutting, and cutting. Holders can be replaced more simply and quickly, which greatly improves workability.

In addition, by allowing the disk holder to be fixed by the operation of the safety key installed in the power linkage unit, it is possible to reliably prevent the phenomenon that the disk holder that rotates at high speed is released during work and causes a safety accident.

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

1 to 7b are diagrams for explaining a disc holder detachment apparatus of a hand grinder according to the present invention. The present invention includes a power linkage unit 20 and a disc D including a grinder body 10. The disk holder 30 is integrally mounted.

As shown in FIGS. 1 to 3A and 3B, one side of the grinder main body 10 has a conventional structure and operates at a high speed by air pressure according to the operation of an electric motor drive or a compressor and moves the screw hole 11a. The rotating shaft 11 is provided, and the power linkage unit 20 and the disk holder 30 are mounted on the rotating shaft 11.

A plurality of grooves 32 are formed on the bottom surface of the through hole 31 of the disc holder 30 at regular intervals, and three protruding pieces 33 are formed between the grooves 32 to connect the power linkage unit ( 20) It is configured to be mounted on or removed from.

The disc holder 30 is usually made of metal, synthetic resin, or the like, and is disposed of when the end of life due to long-term use by integrally mounting the disk (D) as a consumable. Corundum, garnet, etc.) or a conventional one with glass powder may be used, and of course, it is possible to grind, cut, cut, etc. according to the object.

4 to 7A and 7B, the power linkage unit 20 includes a stopper 40 and a housing 50 for forward and reverse rotation on the stopper 40. Cylindrical binding member 60 is mounted at the center of the shaft 50 and is fastened to the rotary shaft 11 of the grinder main body 10 as a fixing bolt 12.

On both sides of the through hole 41 formed in the central portion of the stopper 40, spiral receiving grooves 42a and 42b are formed to gradually move away from the center of the through hole 41, and these receiving grooves 42a and 42b are formed. Concave holes 43a and 43b which are opposed to each other are formed therebetween.

In addition, the circumferential surface of the stopper 40 has an uneven portion 44 for preventing slipping, and an alignment line 44a is formed between the uneven portions 44, and the accommodation grooves 42a, In the 42b), the safety key 46 which consists of a cylindrical roll 45a and the square pole 45b is mounted, respectively.

The housing 50 serves to lock or release the disk holder 30 by operating the safety key 46 in the horizontal direction on the stopper 40, and through the flange 51 and the stopper 40. It consists of a body 52 fitted with (41).

In addition, the alignment line 51a is formed at one side of the circumferential surface of the flange 51 and at the same time, a rectangular guide groove 53 is formed on the bottom thereof so that the square pole 45b at the top of the safety key 46 is formed. Each of these is sandwiched and assembled.

Insertion grooves 54 are formed in the body 52 at the lower end of the flange 51 to bind the housing 50 assembled with the through-hole 41 of the stopper 40 by the fixing ring 55. On both sides of the upper surface of the flange 51, a ball brunger 56 is provided so that the housing 50 can be closely rotated on the stopper 40. As shown in FIG.

The ball brunger 56 is formed by inserting the steel ball 57 and the spring 58 into the insertion hole (51b) formed on both sides of the upper surface of the flange 51 and then fastened with a fixing screw (59), the housing In the forward and reverse rotation of the 50, it is possible to elastically fit or escape into the concave holes (43a, 43b) formed in the stopper 40.

In addition, the stepped portion 61 is formed on the binding member 60 which is assembled to the mounting hole 51c formed at the center of the housing 50 and fastened on the rotary shaft 11 of the grinder body 10. As the three L-shaped locking jaws 62 are formed on the upper side of the stepped jaw 61, the protruding pieces 33 of the disc holder 30 are fitted to be fixed or detachable.

According to the present invention configured as described above, first, the fixing bolt 12 is inserted into the binding member 60 while the power connection unit 20 is mounted on the rotary shaft 11 of the grinder main body 10, and at the same time, the wrench By tightening (not shown) it is possible to fix the power linking unit 20 on the rotary shaft (11).

In addition, when fixing the disk holder 30 on the binding member 60 of the power linkage unit 20, the disk holder 30 is held on the binding member 60 by holding the stopper 40 with one hand. As it is seated and rotated in a clockwise direction, the protruding pieces 33 formed on the disc holder 30 are fastened into the locking step 62 formed on the outer circumferential surface of the binding member 60.

In addition, the housing 50 mounted on the stopper 40 also rotates clockwise, and at this time, each safety key 46 seated in the receiving groove 42a.42b of the stopper 40. The cylindrical roll 45a portion of the disk holder 30 moves in a horizontal direction while the rectangular pole 45b moves in the guide groove 53 formed on the bottom surface of the flange 51 while moving in the receiving grooves 42a and 42b. It fits into the recess 32 formed in the bottom and is fixed.

In this case, the locking state of the disc holder 30 is checked or the ball brunger 56 is configured by matching the alignment lines 44a and 51a formed on the outer circumferential surfaces of the stopper 40 and the housing 50, respectively. The steel ball 57 can check whether the disk holder 30 is mounted with a feeling of locking with a clicking sound.

Accordingly, even when the rotating shaft 11 of the grinder main body 10 is operated at a high speed, the disk holder 30 polishes the surface of the object in a state where it is not separated from the binding member 60 constituting the power linkage unit 20. You can do it.

On the other hand, when the life of the polishing disk (D) is to be replaced, when holding the stopper 40 with one hand, as opposed to the above described when rotating the disk holder 30 counterclockwise of the disk holder 30 At the same time as the protrusion piece 33 is released from the locking step 62 of the binding member 60, the housing 50 mounted on the stopper 40 is also rotated counterclockwise.

Accordingly, the cylindrical roll 45a of the safety key 46, which is seated in the receiving grooves 42a and 42b of the stopper 40, moves in the outward direction through the receiving grooves 42a and 42b. As the 45b) moves horizontally out of the housing 50 in the guide groove 53 of the bottom surface of the flange 51, it is out of the groove 32 of the disk holder 30.

At this time, the alignment lines 44a and 51a respectively formed on the outer circumferential surfaces of the stopper 40 and the housing 50 are kept in a state of being displaced with each other, as well as the steel ball 57 of the ball brunger 56 as well as the stopper 40. It is easy to confirm that the lock is released because it is out of the concave hole (43a, 43b) of the), it can be replaced by a new one by removing the disk holder 30 from the binding member (60).

The above-described embodiment is described with respect to the most preferred embodiment of the present invention, and is not limited to the above embodiment, of course, various modifications are possible without departing from the technical spirit of the present invention.

The drawings are for explaining a polishing disk detachment apparatus of a hand grinder according to the present invention.

1 is a perspective view showing separated components of the hand grinder,

2 is a side configuration diagram showing the state in which each component is assembled;

3A and 3B are cross-sectional configuration diagrams of a disk holder and a bottom view of an “A” portion,

Figure 4 is a perspective view of the separated state of each component constituting the power linkage unit,

5A and 5B are cross-sectional views showing the parts of FIG. 4 assembled;

6A and 6B are planar views for explaining the operation relationship between the stopper and the safety pin constituting the power linkage unit;

7A and 7B are plan and bottom views of a housing constituting the power linkage unit.

* Description of the symbols for the main parts of the drawings *

10: grinder body 11: rotating shaft

11a: screw hole 12: fixing bolt

20: power linkage unit 30: disc holder

31: through hole 32: groove

33: protrusion 40: stopper

41: through hole 42a, 42b: receiving groove

43a, 43b: concave hole 44: uneven portion

44a: alignment line 45a: cylindrical roll

45b: square pole 46: safety key

50: housing 51: flange

51a: alignment line 51b: insertion hole

51c: seating hole 52: body

53: guide groove 54: insertion groove

55: retaining ring 56: ball brunger

57: steel ball 58: spring

59: set screw 60: binding member

61: step 62: hanging step

Claims (4)

A grinder main body 10 provided with a rotating shaft 11 which operates at high speed by electric motor drive or air pressure, The safety key 46 is mounted in the receiving grooves 42a and 42b formed on both sides of the central through-hole 41 while having a binding member 60 fastened to the rotary shaft 11 of the grinder main body 10. A power linkage unit 20 including a stopper 40 and a housing 50 seated on the stopper 40 to operate the safety key 46 in a horizontal direction; It is possible to attach and detach by the locking jaw 62 formed on the outer circumferential surface of the binding member 60 constituting the power linkage unit 20 and at the same time having a groove 32 to be filled with the safety key 46 Disk holder detachment device of the hand grinder, characterized in that the disk holder (D) is inserted and fixed. 2. The safety key 46 according to claim 1, wherein a rectangular guide groove 53 is formed on a bottom surface of the flange 51 constituting the housing 50, and is mounted in the accommodation grooves 42a and 42b on the stopper 40. ) Is inserted into the body 52 of the lower end of the flange 51, an insertion groove 54 is formed to bind the housing 50, which is assembled into the through hole 41 of the stopper 40, by the fixing ring 55. Disk grinder detachment device of a hand grinder, characterized in that configured to be. The disk holder detachment apparatus of claim 2, wherein a ball brunger 56 is provided at both sides of the upper surface of the flange 51 so that the housing 50 can be closely rotated on the stopper 40. . According to claim 3, The ball brunger 56 is fastened with a fixing screw 59 after mounting the steel ball 57 and the spring 58 into the insertion hole 51b formed on both sides of the upper surface of the flange 51 Disk holder detachment device of a hand grinder, characterized in that configured.

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