WO2009013040A1 - Machine-outil portative avec capot de protection - Google Patents

Machine-outil portative avec capot de protection Download PDF

Info

Publication number
WO2009013040A1
WO2009013040A1 PCT/EP2008/056415 EP2008056415W WO2009013040A1 WO 2009013040 A1 WO2009013040 A1 WO 2009013040A1 EP 2008056415 W EP2008056415 W EP 2008056415W WO 2009013040 A1 WO2009013040 A1 WO 2009013040A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamp
hand tool
collar
protective hood
tool according
Prior art date
Application number
PCT/EP2008/056415
Other languages
German (de)
English (en)
Inventor
Sinisa Andrasic
Steffen Wuensch
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN200880100363A priority Critical patent/CN101790436A/zh
Priority to EP08760014A priority patent/EP2173521A1/fr
Publication of WO2009013040A1 publication Critical patent/WO2009013040A1/fr

Links

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
    • 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

Definitions

  • the present invention relates to a hand tool with protective hood, in particular angle grinder, according to the preamble of claim 1.
  • the protective cover covers the grinding wheel in a semicircular manner and is mounted rotatable relative to the angle grinder in such a way that the semicircular sector of the grinding wheel that can be used for grinding is selectably adjustable. Due to the design of the
  • a maximum permissible peripheral speed is set. It is 80 m / sec and results from the speed of the angle grinder and the outer diameter of the respective grinding wheel. This should not be exceeded.
  • Most angle grinders have a clamping neck for holding the protective hood. These clamping necks usually have a uniform outer diameter, which corresponds to the inner diameter of the protective hood body bearing clamp. Therefore, angle grinder protectors of different outer diameter basically fit on any angle grinder due to the same diameter of their clamps. So far, some angle grinders have been combined not only with the designated but also with other protective hoods, especially those for larger grinding wheels. When fitted with the larger grinding wheels, this led to exceeding the maximum permissible peripheral speed - combined with the risks described.
  • Angle grinder only a certain guard and thus only grinding wheels of a certain maximum diameter allows. Grinding wheels with larger than the specified maximum diameter can not be clamped at the respective angle grinder with the protective hood attached, because such grinding wheels do not fit into it, ie because the associated protective cover is too small for it.
  • a special, radially inwardly projecting cam is stamped on the clamp of the guard to which a matching only exactly to this recess in the clamping neck of the angle grinder is provided.
  • Each guard size has - according to the key-keyhole principle - its own, specially designed and sized, radially inwardly projecting cam for the corresponding recess in the neck of the associated angle grinder.
  • Guard bodies are welded for larger, but lower rotating angle grinders. Then, contrary to the coding measure described above, angle grinders with such defective protective hoods could be equipped with impermissibly large grinding wheels, so that they thereby achieve an impermissibly high peripheral speed. There is the above-described high risk of bursting for these grinding wheels.
  • the invention consists in providing a not noticeable to the end user coding between the hood and clamp, which ensures that only correct use protective covers are produced by only ever a single combination between clamp and hood body is possible and they are not accidentally incorrectly combined.
  • FIG. 1 shows an angle grinder with a first embodiment of the associated protective hood
  • FIG. 2 shows an angle grinder with a second embodiment of the associated protective hood
  • Figure 3 is an exploded view of the protective hood.
  • the angle grinder 10 shown in Figure 1 only with its front portion has an elongated housing 12, from the right angle down from its clamping neck 14, an output shaft 16 with an axis 17 occurs, which serves for receiving and rotational driving a grinding wheel, not shown.
  • the clamping collar 14 serves to receive and hold a protective cover 18, which surrounds it concentrically with its clamping collar 28.
  • the clamping collar 14 has to an annular groove 13 and in its area between the annular groove 13 and free end a defined radial recess 15 for captively securing the protective cover 18. This is intended to embrace the grinding wheel. It should be the Protective cover 18 by a corresponding rotational position apron-like all those chips and dust that arise during grinding with the angle grinder and are thrown in the direction of the processor.
  • the radial recess 15 on the outside of the clamping neck 14 serves for the axial passage of a radially inwardly projecting Kodiernockens 34 of the clamp 28 of the protective cover 18 when mounting the guard 18 on the clamping collar 14.
  • Ring groove 13 occur and thus secures the axial position of the protective cover 18th
  • the protective hood 18 consists of a protective hood body 22, which is supported centrally by a clamp 28.
  • the clamp 18 has an inner diameter corresponding to the outer diameter of the clamping neck 14 of the
  • Angle grinder 10 corresponds.
  • the clamp 18 is depending on the construction of the protective cover 18 surrounded by an axially projecting collar 20 of the guard body 18 from the outside or surrounds the collar 20 itself from the outside.
  • the clamp 22 and the collar 20 can be welded or glued together or the like. Cohesively connected.
  • the guard body 18 has a certain outer diameter which corresponds to the size of the grinding wheel to be encompassed.
  • the clamp 28 of the protective hood 18 shown in Figure 1 has two closely spaced radial projections or cams 24 which fit into two matching radial recesses 26 of the collar 20 and this preferably pass through flush, in particular without radially inwardly reach through. As a result, the clamp 28 comes flush with the collar 20, so that this connection stabilizing weld or the like. Is possible.
  • the guard 180 shown in Figure 2 has a guard body 220 with a larger outer diameter than that shown in Figure 1.
  • Your clamp 280 has the same diameter as the clamp 28 of Figure 1. So that the two clamps can not be accidentally welded to the non-conforming guard bodies, the coding between clamp 28 and guard body 220 is accordingly designed to secure the desired pairing. So has the clamp 280 of in
  • FIG. 2 shows only a single, wide, radial projection or cam 240, which fits into and engages in a radial recess 260 of the collar 200, which fits precisely thereto.
  • the clamping collar 280 reaches the collar 200 in flush contact, so that a welded connection stabilizing this connection can be readily produced there.
  • the clamping collar 280 has two radially inwardly extending coding cams which fit into the two associated recesses 150 of the clamping neck 140 and the annular groove 130.
  • the output shaft 160 has according to the larger diameter of the protective cover 180 and the equippable larger
  • Cam 24 is not in the single recess 260, so that the collar 200 can not reach the paralle contact with the inside of the clamp 28, but with the radial dimension of the cam 24 is spaced. A mistakenly made weld is immediately recognizable as faulty, so that such errors can be excluded with certainty - due to the
  • the exploded view shown in Figure 3 of a protective hood 1800 illustrates again the previous description and the embodiment of Figure 2.
  • the clamp 2800 has two angularly bent clamping tabs 3000 for the passage of a clamping screw 3200 with associated clamping nut.
  • the flaps 3000 are moved toward each other as soon as the clamping screw 3200 is rotated relative to the clamping nut.
  • the clamp 2800 has a single encoder hole 3600 to Radial passage of the single radial Kodiernockens 2400.
  • the clamp 2800 is set from the inside against the collar 2000 of the guard body 2200 and welded at flush positioning with this.
  • the correct assignment of clamp 2800 and guard body 2200 is secured and excluded risks for the user of the designated purpose with this guard 1800 angle grinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Clamps And Clips (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne une machine-outil portative (10, 100), en particulier une meuleuse d'angle, pourvue d'un carter de machine (12, 120) présentant un col de serrage (14, 140) auquel un capot de protection (18, 180, 1800) peut être fixé, de préférence au moyen de son collier de serrage (28, 280, 2800) pouvant être fixé au corps (22, 220, 2200) du capot de protection, un codage par complémentarité de forme étant notamment prévu entre la machine-outil portative (10, 100) et le capot de protection (18, 180, 1800), codage sans lequel le capot de protection (18, 180, 1800) ne peut pas être placé sur la machine-outil portative (10, 100) associée, à codage correspondant. Selon l'invention, un codage (24, 240, 2400; 26, 260, 2600) par complémentarité de forme, notamment à la manière d'une clé s'engageant dans un trou de serrure, est placé entre le collier de serrage (28, 280, 2800) et le corps (22, 220, 2200) du capot de protection au niveau d'une fixation mutuelle prévue, codage sans lequel le collier de serrage (28, 280, 2800) ne peut tout simplement pas être fixé au corps (22, 220, 2200) du capot de protection.
PCT/EP2008/056415 2007-07-25 2008-05-26 Machine-outil portative avec capot de protection WO2009013040A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880100363A CN101790436A (zh) 2007-07-25 2008-05-26 具有防护罩的手持式工具机
EP08760014A EP2173521A1 (fr) 2007-07-25 2008-05-26 Machine-outil portative avec capot de protection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007034603.6 2007-07-25
DE200710034603 DE102007034603A1 (de) 2007-07-25 2007-07-25 Handwerkzeugmaschine mit Schutzhaube

Publications (1)

Publication Number Publication Date
WO2009013040A1 true WO2009013040A1 (fr) 2009-01-29

Family

ID=39712483

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/056415 WO2009013040A1 (fr) 2007-07-25 2008-05-26 Machine-outil portative avec capot de protection

Country Status (5)

Country Link
EP (1) EP2173521A1 (fr)
CN (1) CN101790436A (fr)
DE (1) DE102007034603A1 (fr)
RU (1) RU2010106237A (fr)
WO (1) WO2009013040A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106764380A (zh) * 2016-12-29 2017-05-31 江苏省无锡探矿机械总厂有限公司 快速安装保护罩

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008040372A1 (de) 2008-07-11 2010-01-21 Robert Bosch Gmbh Schutzhaubenverdrehsicherungsvorrichtung
DE102010039637A1 (de) * 2010-08-23 2012-02-23 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Spannhals
CN104647209A (zh) * 2013-11-20 2015-05-27 铜陵市大成轧辊有限责任公司 一种可分解防护罩
CN112526798B (zh) * 2019-09-19 2022-12-06 广州立景创新科技有限公司 可变视场角镜头机构、其调整方法以及电子装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259520A1 (de) * 2002-12-19 2004-07-01 Robert Bosch Gmbh Elektrohandwerkzeugmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259520A1 (de) * 2002-12-19 2004-07-01 Robert Bosch Gmbh Elektrohandwerkzeugmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106764380A (zh) * 2016-12-29 2017-05-31 江苏省无锡探矿机械总厂有限公司 快速安装保护罩

Also Published As

Publication number Publication date
EP2173521A1 (fr) 2010-04-14
RU2010106237A (ru) 2011-08-27
CN101790436A (zh) 2010-07-28
DE102007034603A1 (de) 2009-01-29

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