KR101625449B1 - Fixing structure of grinder wheelguard - Google Patents

Fixing structure of grinder wheelguard Download PDF

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Publication number
KR101625449B1
KR101625449B1 KR1020150045723A KR20150045723A KR101625449B1 KR 101625449 B1 KR101625449 B1 KR 101625449B1 KR 1020150045723 A KR1020150045723 A KR 1020150045723A KR 20150045723 A KR20150045723 A KR 20150045723A KR 101625449 B1 KR101625449 B1 KR 101625449B1
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KR
South Korea
Prior art keywords
wheel
grinder
groove
guard
engaging
Prior art date
Application number
KR1020150045723A
Other languages
Korean (ko)
Inventor
양태령
박재현
Original Assignee
계양전기 주식회사
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Filing date
Publication date
Application filed by 계양전기 주식회사 filed Critical 계양전기 주식회사
Priority to KR1020150045723A priority Critical patent/KR101625449B1/en
Application granted granted Critical
Publication of KR101625449B1 publication Critical patent/KR101625449B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/003—Accessories therefor

Abstract

The present invention includes: a body including a rotation shaft combined with a grinder to rotate the grinder; a wheel guard comprising a ring-shaped wheel member installed in the body to be rotatable, and including an insertion groove dented along its edge, and a guard member fixed to the outer surface of the wheel member to prevent fragments, made from work with the grinder, from spattering to a worker; and a fixing unit of which part is selectively inserted into the insertion groove to keep the wheel guard placed in a specific position of the edge of the grinder by being rotated. Therefore, the present invention is capable of improving the convenience of a user by enabling the quick angle adjustment and assembly of the wheel guard, installed in the grinder, through an one-touch method.

Description

[0001] FIXING STRUCTURE OF GRINDER WHEELGUARD [0002]

The present invention relates to a power tool, and more particularly, to a fixing structure of a grinder wheel guard.

Generally, a hand grinder is a tool used for cutting or cutting a metal workpiece directly on the spot while being carried by an operator, and is a machine for machining a workpiece using a donut-shaped disk-shaped grinding wheel. Cutting a metal according to a tool, machining a metal surface, or removing a corroded surface of a metal.

Meanwhile, in the hand grinder as described above, the safety cover for covering the grinding wheel is mounted. In the safety cover, when the metal workpiece is machined, flames or dust are generated due to friction between the grinding wheel and the workpiece, This is to prevent the risk of injury or workplace harm and to generate a certain gripping force in the hands of the operator gripping the grinder during the work, and to prevent injuries caused by the grinding wheel when the operator is careless.

FIG. 1 is a safety cover of a conventional hand grinder. Referring to FIG.

As shown in FIG. 1, the hand grinder includes a body 40 with a built-in driving motor, and a rotary shaft 60 that receives power from the driving motor and rotates the grinding wheel at one end of the body 40 The body 40 is formed with a head portion 50 protruding from a boundary with the rotary shaft portion 60.

The safety cover includes a front surface protection plate 20 protruding from the outer surface of the side surface protection plate 10 having a predetermined angle and is provided on the rotation axis portion 60 of the grinder at the center of the side surface protection plate 10, And is attached to the rotary shaft portion 60 of the grinder by the binding portion 30. The side surface protection plate 10 and the front surface protection plate 20 are provided on the side surface portion It is possible to prevent the worker from being injured due to the flame generated in the front part and also to prevent the workplace harm caused by the dispersion of the dust and in particular to prevent the worker's hands from approaching with the grinding wheel due to carelessness, It is possible to prevent.

However, in the conventional safety cover for a hand grinder as described above, when the angle at which the safety cover is positioned is changed according to the direction in which the fragments generated during the grinder work are changed, the screw fastened to the binding portion 30 is loosened, There is a problem that it takes much time and effort to attach / detach the safety cover or to adjust the angle because the angle is changed by fixing the screw to the binding part 30 again after adjusting the angle.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixing structure of a grinder wheel guard which can improve the convenience of a user by enabling a wheel guard provided on a grinder to be quickly adjusted and detached by a one- For that purpose.

According to an aspect of the present invention, there is provided a grinder for a grinder, the grinder having a rotation axis to which the grinder is coupled, the rotation axis being provided at a periphery of the rotation axis, a plurality of engagement grooves being formed obliquely along the circumferential direction, And an engaging groove formed on an outer surface of the engaging groove, the engaging member being cut from the upper side to the lower side; A ring-shaped wheel member rotatably provided on an outer surface of the engaging member, the engaging protrusion being engaged with the engaging groove by passing through the insertion groove on the inner surface of the wheel member; A wheel guard which is constituted by a guard member for preventing a piece of debris generated at the time of work from being applied to an operator; The present invention also provides a fixing structure for a grinder wheel guard.

Here, the insertion groove may be inclined to the circumferential surface of the coupling member so as to have the same inclination as the engagement groove.

A ring-shaped ring-shaped groove, through which the engagement protrusion can pass, is formed in the lower side of the engagement groove on the outer surface of the engagement member so as to be rotatable in a state where the wheel member is inserted into the outer surface of the engagement member, .

The upper surface of the coupling member, which is in contact with the lower surface of the wheel member when the wheel member is inserted into the outer surface of the coupling member, is provided with a leaf spring for elastically supporting the wheel member upwardly along the height direction of the coupling member .

In addition, the position where the locking protrusion is formed may be disposed on the inner surface of the wheel member at a height at which the locking protrusion can be completely detached from the insertion groove when the wheel member is inserted into the coupling member and the leaf spring is pressed.

The present invention has the effect of improving the convenience of the user by allowing the wheel guard provided on the grinder to be quickly adjusted in angle and detachable in a one-touch manner.

1 is a perspective view showing a structure of a conventional grinder,
2 is a perspective view showing a structure of a wheel guard installed in a conventional grinder,
3 is a perspective view illustrating the structure of a grinder according to an embodiment of the present invention,
FIG. 4 is a perspective view illustrating a method of operating a fixing structure of a grinder wheel guard according to an embodiment of the present invention.

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

FIG. 3 is a perspective view illustrating a structure of a grinder according to an embodiment of the present invention, and FIG. 4 is a perspective view illustrating a method of operating a grinder wheel guard fixing structure according to an embodiment of the present invention.

As shown in these figures, the fixing structure of the grinder wheel guard according to the embodiment of the present invention is provided in the periphery of the rotating shaft of the body provided with the rotating shaft to which the grinder is coupled so as to rotate the grinder, A plurality of engaging grooves 110 are formed along the direction of the engaging grooves 110 and an engaging groove 100 is formed on the outer surface between the engaging grooves 110 and the engaging grooves 110, ; A ring-shaped wheel member rotatably provided on the outer surface of the engaging member (100), a locking protrusion (211) protruding from the engaging groove (110) through the insertion groove (120) And a guard member 220 fixed to an outer surface of the wheel member 210 and configured to prevent a piece of debris generated during operation by the grinder from being worn by a worker, have.

The main body is a member which is grasped by a hand by a hand so that grinding can be performed. A driving motor is provided in the inside of the main body. On the outer surface of one side, a rotating shaft, which is rotationally driven by receiving the driving force of the driving motor, .

A grinder wheel is fixedly coupled to the rotary shaft, and the grinder wheel is rotated and driven according to the rotation of the rotary shaft.

The engaging member 100 is provided at a periphery of the rotation shaft of the body and has a plurality of engaging grooves 110 formed obliquely along the circumferential direction thereof and an outer surface between the engaging grooves 110 and the engaging grooves 110 is formed from the upper side to the lower side The insertion groove 120 is formed to be recessed.

The wheel guard 200 can be rotated at the periphery of the grinder wheel by the coupling member 100 and can be maintained at a specific position.

The upper surface of the engaging groove 110 formed in the outer surface of the engaging member 100 along the circumferential direction thereof is formed with an upwardly inclined inner surface on which the engaging protrusion 211 is engaged. The upper inner surface of the engaging groove 110 is inclined upward The angle of the wheel guard 200 can be adjusted by repeating the insertion and removal of the locking protrusion 211 in the locking groove 110 naturally by the operation of rotating the wheel guard 200 in the clockwise direction.

That is, when the wheel guard 200 is rotated in the clockwise direction, the locking protrusion 211 is slid along the inner surface of the locking protrusion 110 formed in an inclined manner, is detached from the specific locking protrusion 110, So that the insertion is performed naturally.

Of course, since the wheel guard 200 is supposed to be resiliently supported upward, the leaf spring 140 is provided at the periphery of the coupling member 100 to selectively contact the lower surface of the wheel guard 200.

The insertion grooves 120 are formed on the outer surface of the coupling member 100 between the coupling grooves 110 and the coupling grooves 110 so that the coupling grooves 120 are cut from the lower end to the upper end of the coupling member 100, The insertion protrusion 211 is inserted through the insertion groove 120 when the insertion protrusion 211 is initially inserted into the outer surface of the coupling member 100.

The insertion groove 120 is inclined on the circumferential surface of the coupling member 100 so as to have the same inclination as the engagement groove 110 so that the wheel member 200 can be inserted naturally.

The engagement member 100 is formed in a ring shape such that the engagement protrusion 211 can pass through under the engagement groove 110 on the outer surface of the engagement member 100 so as to be rotatable in a state where the wheel member 210 is inserted into the outer surface of the engagement member 100 It is effective that the formed ring-shaped groove 130 is provided along the circumferential direction of the engagement member 100.

The wheel member 210 is attached to the upper surface of the coupling member 100 that contacts the lower surface of the wheel member 210 when the wheel member 210 is inserted into the outer surface of the coupling member 100, The leaf spring 140 elastically supporting the leaf spring 140 along the direction of the leaf spring 140 allows the latching protrusion 211 to be inserted and removed from the latching groove 110 naturally as described above.

On the other hand, the wheel guard 200 prevents the periphery of the work due to the debris generated when the grinding operation is progressed by the grinder wheel to the periphery. In particular, safety accident occurs due to fragmentation to the worker It is effective that the wheel guard 200 is rotatably coupled to the periphery of the engaging member 100. [

The wheel guard 200 includes a ring-shaped wheel member 210 directly attached to the circumferential surface of the coupling member 100 and having an insertion protrusion 211 protruded from one side of the inner surface thereof, And a guard member 220 having a fan-shaped transverse cross-section so that fragments generated during operation by the grinder can be prevented from being worn by the operator.

The wheel member 210 is a ring-shaped member, and at one side of its inner surface, a locking protrusion 211 is formed to protrude in a locking groove 110 formed around the outer surface of the coupling member 100.

When the leaf spring 140 is pressed by inserting the wheel member 210 into the engaging member 100, the engaging protrusion 211 is disengaged from the inserting groove 120, And is disposed on the inner surface of the wheel member 210 having a height that can be disposed in the ring-shaped groove 130.

The guard member 220 is fixed to the outer surface of one side of the wheel member 210 so as to prevent the debris from escaping to the outside during the grinder work. For this purpose, the guard member 220 is formed to have a fan-shaped longitudinal cross- And has a predetermined height.

The process of adjusting the installation angle of the wheel guard using the grinder wheel guard fixing structure according to an embodiment of the present invention having such a configuration is as follows.

First, a locking protrusion 211 protruding from the inner surface of the wheel guard 200 is inserted into the outer surface of the coupling member 100 through the insertion groove 120.

When the wheel guard 200 is rotated in the clockwise direction, the wheel guard 200 is naturally positioned at a desired position while rotating and driving the engaging groove 211 repeatedly inserted and removed in the engaging groove 110.

When the wheel guard 200 is rotated in the clockwise direction, the engaging protrusion 211 slides along the inner surface of the engaging groove 110 formed in an inclined manner, is detached from the specific engaging groove 110, This is because the insertion is performed naturally.

In this process, the leaf spring 140 is provided on the periphery of the coupling member 100 to elastically support the wheel guard 200 upward. By this operation, the wheel guard 200 can be quickly Position to perform the grinder operation.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: engaging member 110: engaging groove
120: insertion groove 130: ring groove
140: leaf spring 200: wheel guard
210: wheel member 220: guard member

Claims (5)

A plurality of engaging grooves 110 are formed in an oblique direction along the circumferential direction of the body, and the engaging grooves 110 and the engaging grooves 110 110); a coupling member (100) in which an insertion groove (120) cut from the upper side to the lower side is recessed;
A ring-shaped wheel member rotatably provided on the outer surface of the engaging member (100), a locking protrusion (211) protruding from the engaging groove (110) through the insertion groove (120) And a guard member 220 fixed to an outer surface of the wheel member 210 to prevent a piece of debris generated during operation by the grinder from being caught by a worker. Including,
The insertion groove 120 is inclined to the circumferential surface of the coupling member 100 so that the insertion groove 120 has the same inclination as the coupling groove 110. A lower portion of the coupling groove 110 is formed on the outer surface of the coupling member 100, A ring-shaped groove 130 formed in a ring shape through which the locking protrusion 211 can pass is rotatable in a state where the member 210 is inserted into the outer surface of the coupling member 100, Wherein the grinding wheel is attached to the grinding wheel. delete delete The method according to claim 1,
The wheel member 210 is mounted on the upper surface of the coupling member 100 in contact with the lower surface of the wheel member 210 when the wheel member 210 is inserted into the outer surface of the coupling member 100, And a leaf spring (140) elastically supporting the grinding wheel (100) upward along a height direction of the grinding wheel guard (100). 5. The method of claim 4,
The locking protrusion 211 is formed by inserting the wheel member 210 into the coupling member 100 so that the locking protrusion 211 is inserted into the insertion groove 120 when the leaf spring 140 is pressed, Is disposed on the inner surface of the wheel member (210) at a height that can be disposed in the ring groove (130).
KR1020150045723A 2015-03-31 2015-03-31 Fixing structure of grinder wheelguard KR101625449B1 (en)

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KR1020150045723A KR101625449B1 (en) 2015-03-31 2015-03-31 Fixing structure of grinder wheelguard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150045723A KR101625449B1 (en) 2015-03-31 2015-03-31 Fixing structure of grinder wheelguard

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KR101625449B1 true KR101625449B1 (en) 2016-05-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109305473A (en) * 2018-11-07 2019-02-05 湖南新亚胜光电股份有限公司 LED display anti-collision protection structure and LED display

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200211732Y1 (en) 1996-04-30 2001-04-02 이종수 Disc Grinder Safety Device
US20050215186A1 (en) 2003-09-16 2005-09-29 Peter Stierle Portable power tool with protective cover
JP2013501635A (en) 2009-08-10 2013-01-17 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Machine tool with protective cover
CN101607397B (en) 2008-06-20 2014-11-12 罗伯特·博世有限公司 Power tool, in particular handheld power tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200211732Y1 (en) 1996-04-30 2001-04-02 이종수 Disc Grinder Safety Device
US20050215186A1 (en) 2003-09-16 2005-09-29 Peter Stierle Portable power tool with protective cover
CN101607397B (en) 2008-06-20 2014-11-12 罗伯特·博世有限公司 Power tool, in particular handheld power tool
JP2013501635A (en) 2009-08-10 2013-01-17 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Machine tool with protective cover

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109305473A (en) * 2018-11-07 2019-02-05 湖南新亚胜光电股份有限公司 LED display anti-collision protection structure and LED display
CN109305473B (en) * 2018-11-07 2023-10-20 湖南新亚胜光电股份有限公司 LED display screen anticollision protection architecture and LED display screen

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