EP3067155A1 - Appareil pour attacher/détacher un outil de meulage pour meuleuse - Google Patents

Appareil pour attacher/détacher un outil de meulage pour meuleuse Download PDF

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Publication number
EP3067155A1
EP3067155A1 EP14900065.5A EP14900065A EP3067155A1 EP 3067155 A1 EP3067155 A1 EP 3067155A1 EP 14900065 A EP14900065 A EP 14900065A EP 3067155 A1 EP3067155 A1 EP 3067155A1
Authority
EP
European Patent Office
Prior art keywords
coupler
grinding tool
sleeve
groove
grinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14900065.5A
Other languages
German (de)
English (en)
Other versions
EP3067155A4 (fr
EP3067155B1 (fr
Inventor
Chang-Seong KIM
Kyung-Jin Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
E & Q One-Touch
E & Q One Touch
Original Assignee
E & Q One-Touch
E & Q One Touch
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by E & Q One-Touch, E & Q One Touch filed Critical E & Q One-Touch
Publication of EP3067155A1 publication Critical patent/EP3067155A1/fr
Publication of EP3067155A4 publication Critical patent/EP3067155A4/fr
Application granted granted Critical
Publication of EP3067155B1 publication Critical patent/EP3067155B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • 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
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor

Definitions

  • the present invention relates to a polishing holder removing device for a grinder that allows a grinding tool to be simply coupled/decoupled to/from a coupler, which is mounted on a rotary shaft of a body of a hand grinder and is rotated at a high speed, and that can ensure anti-vibration, stability, continuity, and smooth transmission of power in grinding by more firmly coupling the grinding tool to the coupler.
  • a grinder that precisely grinds an object by rotating a grindstone is used for work requiring some degree of precision, while a hand grinder, which is light and convenient to use, is generally used to finish parts that do not require high precision.
  • a rotary shafts is rotated at a high speed by an electric motor or air pressure generated by a compressor, a grinding tool on the rotary shaft polishes an object made of wood, stone, or steel or by grinding the surface or finishes an object by grinding incompletely machined portion, or edges and corners.
  • a "Grinding Head for a Grinder” has been disclosed in Korean Utility Model No. 0356304 , in which a head equipped with a grinding plate is separably fitted on a rotary shaft by a fastener such as a nut, but it is required to repeat tightening or loosening the nut with a specific tool such as a spanner. Further, it unnecessarily takes time to replace the grinding plate and it is required to move the grinder to a place, where the grinding plate can be replaced, when working at a small place or a high place, so it is difficult to continuously work, thereby deteriorating work efficiency.
  • Korean Utility Model Nos. 0373648 and 0376952 has proposed structures in which a sleeve that axially moves is mounted around a coupler and a grinding tool can be coupled/decoupled in a one-touch way by moving in/out a locking ball.
  • a grinding tool that is mounted on a rotary shaft of the body of a grinder can be simply coupled/decoupled, so there is no need for a specific tool or fastener, and accordingly, work efficiency can be improved.
  • a grinding tool and a coupler can be coupled in a gear type, so the coupling force of the coupler and the grinding tool is increased, and accordingly, stability can be ensured with minimum vibration in work.
  • the defect in this technique are as follows.
  • the second body of grinding tools is made of resin, so vibration is generated by elasticity that is a feature of the material.
  • dust produced in grinding is accumulated and hardened on the operation portions of a coupler, which causes malfunction.
  • dust such as paint, oil, and iron powder is accumulated and hardened in grooves of bearings, which causes malfunction.
  • An aspect of the present invention provides a polishing holder removing device for a grinder that does not need a specific tool or fastener by allowing a grinding tool to be simply coupled/decoupled to/from a rotary shaft of a grinder body and can considerably improve work efficiency by making it easy to replace consumable parts and allowing for continuous work.
  • an aspect of the present invention also provides a polishing holder removing device for a grinder that can increase coupling force between a coupler and a grinding tool by combining a grinding tool and a coupler in a mechanical contact type using surface contact, prevent vibration and separation in work by holding a grinding tool in a double structure at the front and rear with a bearing, and transmit power well.
  • an aspect of the present invention also provides a polishing holder removing device for a grinder that can prevent permeation of dirt using a sealing member at the joint of a grinding tool and a coupler and discharge even dust, which may flow into a grinder body, to the outside using a specific exit formed in a coupler.
  • a polishing holder removing device for a grinder that can fix or release a grinding tool by sliding a coupler mounted on a rotary shaft of a grinder body and a sleeve disposed around the coupler and that includes a grinding tool that is equipped with an abrasive at a portion of the body, a coupler that is mounted on a grinder body, a sleeve that slides on the outer side of the coupler, locking balls that are disposed in the coupler to fix or release the grinding tool, a spring that provides elasticity when the sleeve slides, and a cap nut that retains the sleeve, in which a cylindrical shank, a groove, and a rectangular shank are sequentially formed at an end portion of a body of the grinding tool, the coupler has a seating hole and a rectangular hole where the grinding tool is fitted and fixed, a threaded-hole for fastening to a grinder body, and a flange having two lines
  • dust exit holes connected to the rectangular hole are formed in the flange of the coupler.
  • projections divided by a spherical groove are formed on the inner side of the sleeve to retain the locking balls; and a lower dustproof rubber and washer are disposed in a lower dustproof groove and an upper dustproof rubber is disposed in an upper dustproof groove to prevent permeation of dust.
  • a grinding tool is fastened in a double fixing type by a bearing and a surface contact portion axially formed on the outer side of the grinding tool and on the inner side of the coupler, so a coupling force between the coupler and the grinding tool can be increased. Accordingly, vibration can be minimized in working and power can be smoothly transmitted.
  • the present invention employs some of the configuration in Korean Patent No. 1056036 , but improves defects of the patent, so the configuration of this device will be cited first and then the configuration relating to improvement by the present invention will be described in detail.
  • a polishing holder removing device for a grinder includes a grinding tool 11 that is coupled with various abrasives P1, depending on the objects to be machined, a coupler 12 where the grinding tool 11 is fitted and fixed and that is rotated at a high speed by a rotary shaft P3 of a grinder body P2, and a sleeve 13 that elastically slide around the outer side of the coupler 12.
  • locking balls 14 that are moved into/out of the coupler 12 when the sleeve 13 is moved so that the grinding tool 11 can be coupled/decoupled, a spring 15 that applies elasticity to the sleeve 13, and a cap nut 16 that is coupled to the front portion of the coupler 12 to retain the locking balls 14.
  • the grinding tool 11 may be manufactured by separately forming a first body 19A equipped with the abrasive P1 and a second body 19B having the outer toothed-portion 18b and then combining the bodies, in which a shank 20b having slits 20a may be formed at an end of the first body 19A and an insertion hole 20c may be formed at the second body 19B to combine them.
  • an adhesive may be applied to the slits 20a of the first body 19A so that they can be held like a single unit in the insertion hole 20c of the second body 19B.
  • Fourth through holes 21a are formed on the same line around the body of the coupler 12, a threaded-portion 21b and a step 21c are formed at both ends, respectively, and a seating hole 22a for receiving the flanges 17a and 17b of the grinding tool 11 are formed in the body.
  • an inner toothed-portion 22b is formed at the center portion connected to the seating hole 22a and a female threaded-portion 22c is formed behind the inner toothed-portion 22b, so it can be thread-fastened to a rotary shaft P3 mounted on a common grinder body P2.
  • a protrusion 24 having an inclined surface 23a and a step 23b is formed at a side on the inner side of the sleeve 13 that is disposed around the coupler 12, an anti-sliding portion 25 is formed around the outer side of the sleeve 13, and the spring 15 is disposed between the step 23b at the protrusion 24 of the sleeve 13 and the step 21c on the outer side of the coupler, so the sleeve 13 can be elastically moved.
  • This configuration has been disclosed in Korean Patent No. 1056036 by the applicant(s) and the present invention can provide a hand grinder having higher performance by removing defects in the related art described above, on the basis of the configuration.
  • the grinding tool 110 can be equipped with not only an abrasive P1 formed like a brush, but also a grinding stone formed in the shape of a disc, a cone, and a cup, depending on the material, size, and use of an object to be machined, and a cylindrical shank 111, a groove 112, and a rectangular shank 113 are sequentially formed at an end portion of the body of the grinding tool 110.
  • the coupler 120 has a seating hole 121a and a rectangular hole 121b where the grinding tool 110 is fitted and fixed, a threaded-hole 121c for fastening to a grinder body P2, and a flange having two lines of through holes 122a and 122b formed around the outer side.
  • Two to four through holes 122a and 122b may be formed in two lines around the outer side of the coupler 120 and three ball holes may be formed with intervals of 120°.
  • the sleeve 130 is fitted on the coupler 120 to slide left and right, in which a lower dustproof groove 133 having a step 132a and a seating groove 134 are formed at a side in the sleeve 130 and an upper dustproof groove 135 is formed at the other side.
  • a dustproof rubber 136a and a washer 136b are disposed in the lower dustproof groove 133 and an upper dustproof rubber 137a is disposed in the upper dustproof groove 135, so it is possible to prevent permeation of dust produced by grinding. Further, a pair of projections 138b and 138c divided by a spherical groove 138a is formed on the inner side 131 of the sleeve 130.
  • the locking balls 140 are disposed in the through holes 122a and 122b formed in the coupler 120 and moved toward/away from the cylindrical shank 111 and the groove 112 of the grinding tool 110 when the sleeve 130 moves so that the grinding tool 110 can be fixed or released.
  • the locking balls 140 are put into the two lines of through holes 122a and 122b formed around the coupler 120 and then the sleeve 130 is coupled to the front end portion of the coupler 120 with the spring 150 fitted on the outer side, so the locking balls 140 are retained in the through holes 122a and 122b.
  • the locking balls 140 are pushed out of the through holes 122a and 122b and temporarily moved to the portion between the projections 138a and 138b. Further, as the sleeve 130 is returned by the restoring force of the spring 150, the projections 138a and 138b push the locking balls 140 and move toward the cylindrical shank 111 and the groove 112 of the grinding tool 110, so the grinding tool 110 can be firmly fixed.
  • the coupling force between the coupler 120 and the grinding tool 110 rotated at a high speed in grinding is increased, so vibration can be minimized in work and stability can be ensured. Further, power can be very smoothly transmitted from the grinder body P2.
  • a space to which the locking balls 140 can be moved is formed by pulling the sleeve 130 toward the grinder body P2 and then the grinding tool 110 is pulled out of the seating hole 121a of the coupler 120, so the grinding tool 110 can be easily separated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP14900065.5A 2014-08-21 2014-11-27 Appareil pour attacher/détacher un outil de meulage pour meuleuse Active EP3067155B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020140108745A KR101535217B1 (ko) 2014-08-21 2014-08-21 그라인더용 연마공구의 탈, 부착장치
PCT/KR2014/011456 WO2016027936A1 (fr) 2014-08-21 2014-11-27 Appareil pour attacher/détacher un outil de meulage pour meuleuse

Publications (3)

Publication Number Publication Date
EP3067155A1 true EP3067155A1 (fr) 2016-09-14
EP3067155A4 EP3067155A4 (fr) 2017-09-06
EP3067155B1 EP3067155B1 (fr) 2020-02-12

Family

ID=53792404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14900065.5A Active EP3067155B1 (fr) 2014-08-21 2014-11-27 Appareil pour attacher/détacher un outil de meulage pour meuleuse

Country Status (6)

Country Link
EP (1) EP3067155B1 (fr)
KR (1) KR101535217B1 (fr)
CN (1) CN106061680B (fr)
ES (1) ES2786188T3 (fr)
PT (1) PT3067155T (fr)
WO (1) WO2016027936A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018536545A (ja) * 2016-10-28 2018-12-13 イーアンドキュー ワン−タッチ カンパニー リミテッド 研磨工具固定具および研磨工具固定具の本体製作方法
CN109048677A (zh) * 2018-09-03 2018-12-21 江燕婷 一种建筑用大型环保板材环孔抛光打磨装置
US10875147B2 (en) 2016-10-28 2020-12-29 E&Q One-Touch Co., Ltd. Grinding tool fixture and method of manufacturing main body of grinding tool fixture

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KR101728066B1 (ko) * 2016-10-28 2017-05-02 주식회사 이엔큐원터치 연마공구고정구의 본체 제작방법
CN206555683U (zh) * 2016-12-28 2017-10-13 深圳市大疆灵眸科技有限公司 云台手持杆组件及装设有该云台手持杆组件的云台
KR101773447B1 (ko) * 2017-01-16 2017-08-31 주식회사 이엔큐원터치 핸드그라인더에 결합되어 사용되는 연마디스크 체결방법
KR102010956B1 (ko) * 2017-11-01 2019-08-14 주식회사 모두기술 휴대형 연마장치
KR101934512B1 (ko) 2018-05-03 2019-01-02 김창성 스트레이트 타입 생크의 탈부착을 위한 커플러
CN109182105B (zh) * 2018-09-27 2023-10-03 瑞智康生物技术（昆山）有限公司 一种旋转卡位手持式组织研磨器
CN109182106B (zh) * 2018-09-27 2023-10-03 瑞智康生物技术（昆山）有限公司 一种快速更换研磨杵的手持式组织研磨器
CN110103124B (zh) * 2019-03-28 2024-03-22 北京百慕合金有限责任公司 砂轮片装置、砂轮切割设备及切割方法
CN112894564A (zh) * 2019-12-03 2021-06-04 南京德朔实业有限公司 研磨类电动工具
CN110900533A (zh) * 2019-12-09 2020-03-24 台州奇峰工具有限公司 电动液压工具中的卡模结构及其加工方法和装卸方法
CN114310586B (zh) * 2020-09-25 2023-04-14 南京泉峰科技有限公司 研磨类电动工具
CN113510663B (zh) * 2021-06-08 2022-10-21 浙江亚特电器股份有限公司 一种多功能机的工作头快装结构及多功能机
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JP2018536545A (ja) * 2016-10-28 2018-12-13 イーアンドキュー ワン−タッチ カンパニー リミテッド 研磨工具固定具および研磨工具固定具の本体製作方法
US10875147B2 (en) 2016-10-28 2020-12-29 E&Q One-Touch Co., Ltd. Grinding tool fixture and method of manufacturing main body of grinding tool fixture
CN109048677A (zh) * 2018-09-03 2018-12-21 江燕婷 一种建筑用大型环保板材环孔抛光打磨装置
CN109048677B (zh) * 2018-09-03 2020-04-21 广州勤业建筑安装工程有限公司 一种建筑用大型环保板材环孔抛光打磨装置

Also Published As

Publication number Publication date
WO2016027936A1 (fr) 2016-02-25
EP3067155A4 (fr) 2017-09-06
CN106061680B (zh) 2017-11-24
CN106061680A (zh) 2016-10-26
ES2786188T3 (es) 2020-10-09
EP3067155B1 (fr) 2020-02-12
PT3067155T (pt) 2020-04-28
KR101535217B1 (ko) 2015-07-09

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