EP0333710B1 - Befestigungsaufnahme einer schutzhaube für tragbare schleifmaschinen - Google Patents

Befestigungsaufnahme einer schutzhaube für tragbare schleifmaschinen Download PDF

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Publication number
EP0333710B1
EP0333710B1 EP87905603A EP87905603A EP0333710B1 EP 0333710 B1 EP0333710 B1 EP 0333710B1 EP 87905603 A EP87905603 A EP 87905603A EP 87905603 A EP87905603 A EP 87905603A EP 0333710 B1 EP0333710 B1 EP 0333710B1
Authority
EP
European Patent Office
Prior art keywords
protective hood
locking member
size
medium
locking
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.)
Expired - Lifetime
Application number
EP87905603A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0333710A1 (de
Inventor
Walter Barth
Erich Borst
Winfried Helm
Manfred Stäbler
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.)
Robert Bosch GmbH
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
Publication of EP0333710A1 publication Critical patent/EP0333710A1/de
Application granted granted Critical
Publication of EP0333710B1 publication Critical patent/EP0333710B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 invention relates to a protective hood for grinding machines, in particular for angle grinders, and a matching mounting receptacle for them according to the category of claim 1.
  • a protective hood for grinding machines is known, which is easily detachable and mountable on the neck of the grinding machine by means of a bayonet-type holder.
  • the protective hood can be turned clockwise into several positions on the neck of the grinding machine, which can be locked against the force of a resilient locking bolt.
  • the known protective hood has a disadvantage that applies to all previously known grinding machines or protective hoods: With grinding machines, the permissible peripheral speed of the clamped grinding wheel must not be exceeded. The maximum permissible grinding wheel diameter depends on the nominal speed of the machine. Taking these into account, only grinding wheels up to a maximum permissible diameter should be clamped. In order to influence this, it is known that the grinding machines, which are smaller in terms of their performance, are dimensioned smaller in terms of the cylindrical fastening heel than more powerful machines. As a result, only those protective hoods fit on the smaller fastening heel, the holding part of which is also correspondingly small.
  • the protective hood according to the invention for grinding machines, in particular angle grinders, and the corresponding mounting receptacle for them, with the characterizing features of the main claim, has the following advantages. It is created with simple means a coding between the grinding machine, namely its fastening shoulder, on the one hand, and protective hood, namely its holding part, on the other hand, which is constructed in such a way that smaller protective hoods but no larger than the maximum permissible can be installed.
  • the clamping neck diameter of the fastening shoulder is always the same size.
  • FIG. 1 shows, as an example of a grinding machine, a manually operated angle grinder 10, to the housing 11 of which a mounting receptacle 14 is screwed by means of screws 15, where the drive shaft 12 for the grinding wheel 13 exits, which penetrate a flange 16 of the mounting receptacle 14.
  • the flange 16 carries a cylindrical fastening shoulder 17 which is penetrated in the center by the drive shaft 12 and has an at least substantially smooth outer peripheral surface 18.
  • the mounting receptacle 14 is e.g. from a single casting.
  • a protective hood 30 is fastened on the fastening shoulder 17 of the fastening receptacle 14 by means of a holding part 31 attached to it.
  • the holding part 31 consists of a with the protective cover 30 z.
  • the body of the protective hood 30 extends approximately over 180 o circumferential angle and there provides a protective cover for the grinding wheel 13. Before the clamping screw 34 is tightened, the protective hood 30 on the cylindrical fastening shoulder 17 is pivoted into the position which is the most favorable for the forthcoming machining operation and offers the best protection by means of the protective hood 30 for the environment and in particular for the operator.
  • the permissible peripheral speed of the grinding wheel 13 must not be exceeded.
  • the maximum permissible diameter of the grinding wheel 13, which is used in the angle grinder 10, is therefore dependent on the nominal speed of the angle grinder 10.
  • FIGS. 1-5 it is explained below how the angle grinder 10 is assigned to the nominal speed by assigning the protective hood 30 only grinding wheels 13 can be clamped up to the maximum permissible diameter.
  • the holding part 31 of the protective hood 30 has at least one locking member 35 which projects in the radial direction in the first exemplary embodiment shown.
  • the locking member 35 protrudes instead in the axial direction.
  • the fastening shoulder 17 has an opening 19 into which the locking member 35 can engage when fastening the holding part 31 on the fastening shoulder 17.
  • the opening 19 is designed here as an axially directed insertion opening 20 which is open towards the free end of the fastening shoulder 17 and into which the associated locking member 35 engages when the holding part 31 of the protective hood 30 is placed axially.
  • the locking member 35 and the associated insertion opening 20 are selected with regard to their shape and size as a function of the protective hood size determined by the nominal grinding machine speed.
  • the locking member 35 fits into the insertion opening 20, so that it is ensured that a protective hood 30 of this type can be attached to the angle grinder 10. Also z. B.
  • angle grinders 10 If one considers a series of angle grinders 10 with different nominal speeds, these angle grinders each have fastening heels 17 of the same size, but vary with regard to the shape and / or size of the insertion opening 20. Corresponding assignment there are protective hoods 30 of different sizes for these angle grinders, whose holding part 31 is dimensioned the same size, so that it fits on the fastening paragraph 17, but different in shape and / or size-sized locking members 35.
  • the locking members 35 of one size only fit into associated insertion openings 20 which are the same or larger than the respective locking member 35. In contrast, such a locking member 35 does not fit into the insertion opening 20, which is larger than that.
  • the width b of the blocking member 35 measured in the circumferential direction and the width a of the associated insertion opening 20 measured in the same direction vary correspondingly to different protective hood sizes. Accordingly, a wide locking member 35 is provided, for example, for a large protective hood size, a medium-wide locking member 35 for a medium protective hood size and a narrow locking member 35 for a small protective hood size.
  • the fastening shoulder 17 has a wide insertion opening 20 for a large protective hood size with a wide locking member 35, a medium-wide insertion opening 20 for a medium protective hood size with a medium-wide locking member 35 and a narrow insertion opening 20 for a small protective hood size with a narrow locking member 35.
  • the fastening shoulder 17 has an outer annular groove 21, which is normally provided to receive a locking lug, which is seated on the holding part 31 and is directed radially inward from there, as an axial securing means for the attached protective hood 30.
  • this axial securing by means of the annular groove 21 and the locking lug on the holding part 31 is independent of the explained inventive coding, achieved through the insertion opening 20 on the one hand and the locking member 35 on the other.
  • a particular simplification is obtained if the locking lug provided for axial securing is at the same time designed and used as a locking member 35 and if the annular groove 21 provided as an axial securing device is also designed and used as an opening 19 assigned to the locking member 35.
  • the axial insertion opening 20 leads to the annular groove 21, into which it opens. After the axial engagement in the insertion opening 20 by rotating the protective cover 30 with the holding part 31, it can engage approximately in the manner of a bayonet in the annular groove 21, as a result of which the described axial securing of the fastening is achieved.
  • the axially directed insertion opening 20 is omitted.
  • the fastening shoulder 17 is only equipped with the annular groove 21, which at the same time serves as an opening for the coding described.
  • the protective hood 30 has, as shown in FIGS. 4 and 5, the radially projecting locking member 35, which can also engage in the annular groove 21 for axial securing when the protective hood 30 is rotated on the fastening shoulder 17 after the protective hood has been attached, that the locking member 33 enters the annular groove 21 in the circumferential direction.
  • the coding in the axial direction varies for the purpose mentioned measured thickness of the locking member 35 and the associated, axially measured width of the annular groove 21 corresponding to different protective hood sizes.
  • a thick locking member 35 is provided for a large protective hood size, a medium-thick locking member 35 for a medium protective hood size and a thin locking member 35 for a small protective hood size.
  • the fastening shoulder 17 then has a wide annular groove 21 for a large protective hood size with a thick locking member 35, a medium-wide annular groove 21 for a medium protective hood size with a medium-thick locking member 35 and a narrow annular groove 21 for a small protective hood size with a thin locking member 35.
  • This embodiment has the advantage that always one and the same type of mounting receptacle 14 z. B. can be made as a cast part, the coding of which takes place later during processing, in that a correspondingly wide, medium-wide or narrow annular groove is pierced when piercing the annular groove 21.
  • the radial overhang dimension of the locking member 35 and the groove depth of the annular groove 21 are used for coding.
  • the width b of the locking member 35 measured in the circumferential direction and additionally the thickness of the locking member 35 measured in the axial direction can be used.
  • the width a of the insertion opening 20 measured in the circumferential direction and additionally the width of the annular groove 21 are then decisive for the coding in the fastening shoulder 17.
  • the holding part 131 of the protective hood 130 has a plurality of locking members 135 arranged at intervals from one another in the circumferential direction.
  • the cylindrical fastening shoulder 117 provided on the machine side has a plurality of insertion openings 120 which merge into the annular groove 121.
  • the insertion openings 120 are arranged at the same circumferential angular distances from one another as the locking members 135. Their width, measured in the circumferential direction, is dimensioned like that of the locking members 135.
  • the coding can take place here via the number of locking members 135 of the holding part 131. For example, as shown in FIG. 7, three locking members 135 are provided for a large protective hood size.
  • the fastening shoulder 117 has three matching insertion openings 120, as shown in FIG. 6.
  • the fastening shoulder 117 has only two matching insertion openings 120 and for a small protective hood size with a locking member 135 only one matching insertion opening 120. B. dimensioned the same size.
  • the cylindrical fastening shoulder 217 has an insert 222 which contains the at least one axially directed insertion opening 120 and also an annular groove part 221a which adjoins the remaining part of the annular groove 221.
  • the insert 222 is inserted in an axial receptacle 223 of the fastening shoulder 217 with a precise fit.
  • the receptacle 223 and the insert 222 are approximately dovetail-shaped, so that the insert 222, inserted axially into the receptacle 223, cannot escape radially inwards or outwards.
  • the insert 222 is designed as a molded plastic part.
  • the shape and size of the receptacle 223 of the fastening shoulder 217 is the same for all inserts 222.
  • the inserts 222 vary insofar as they have insertion openings 220 of different widths in the circumferential direction, depending on the size of the machine, as described with reference to the first exemplary embodiment.
  • the number and / or shape and / or size of the insertion opening 220 can be used for coding, the size in the radial direction and / or the axial direction and / or the circumferential direction to be subsumed under size.
  • the third exemplary embodiment has the advantage that a single casting can be used for the mounting receptacle for different sizes and types of grinding machines, even in its final processing. Only during the final assembly, for example on the assembly line, is the coding of the fastening shoulder 217 carried out to the desired extent by inserting the respectively assigned insert 222. In the customer service, too, only a single part is required for the fastening receptacle, each with associated inserts 222. The respective inserts 222 can additionally by different colors can be identified and carry the assigned diameter information so that the correct protective hood assignment can be seen at a glance.
  • the fastening shoulder 17, 117, 217 always has the same diameter regardless of the size of the machine.
  • all protective hoods already in operation, the holding part 31, 131 of which is still without a locking member fit onto such fastening heels.
  • the user has the option of not only using the appropriate protective hood size, but at any time, e.g. B. for reasons of manageability, to install smaller protective hoods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP87905603A 1986-10-28 1987-09-05 Befestigungsaufnahme einer schutzhaube für tragbare schleifmaschinen Expired - Lifetime EP0333710B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863636601 DE3636601A1 (de) 1986-10-28 1986-10-28 Schutzhaube fuer schleifmaschinen, insbesondere winkelschleifer, und dazu passende befestigungsaufnahme auf diese
DE3636601 1986-10-28

Publications (2)

Publication Number Publication Date
EP0333710A1 EP0333710A1 (de) 1989-09-27
EP0333710B1 true EP0333710B1 (de) 1992-07-29

Family

ID=6312615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87905603A Expired - Lifetime EP0333710B1 (de) 1986-10-28 1987-09-05 Befestigungsaufnahme einer schutzhaube für tragbare schleifmaschinen

Country Status (6)

Country Link
US (1) US5005321A (es)
EP (1) EP0333710B1 (es)
JP (1) JP2635640B2 (es)
DE (2) DE3636601A1 (es)
ES (1) ES2005658A6 (es)
WO (1) WO1988003077A1 (es)

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DE3943134B4 (de) * 1989-12-28 2005-06-09 Robert Bosch Gmbh Klemmvorrichtung für ein an einer Führung verschiebbares Teil
DE4113641A1 (de) * 1991-04-26 1992-10-29 Bosch Gmbh Robert Handwerkzeugmaschine
DE4120337A1 (de) * 1991-06-20 1992-12-24 Wabco Westinghouse Fahrzeug Zweikreisige spannungsversorgungsschaltung fuer fahrzeuge
DE4239367A1 (de) * 1992-11-24 1994-05-26 Bosch Gmbh Robert Handgeführtes Elektrowerkzeug, insbesondere Winkelschleifmaschine
US5411433A (en) * 1994-06-13 1995-05-02 Dynabrade, Inc. Dust-collecting apparatus
US5637035A (en) * 1995-06-28 1997-06-10 Milwaukee Electric Tool Corporation Adjustable guard arrangement for power tool
DE19834839C2 (de) 1998-08-01 2002-04-11 C & E Fein Gmbh & Co Kg Schleifmaschine mit einer abnehmbaren Schutzhaube
US6071184A (en) * 1998-09-02 2000-06-06 Seh America, Inc. Fluid deflecting device for use in work piece holder during a semiconductor wafer grinding process
US6048260A (en) * 1999-07-01 2000-04-11 Roto-Zip Tool Corporation Angle attachment for power tool
US6561887B2 (en) * 2000-02-17 2003-05-13 Bao Shyan Lai Protective cover detachably installed on a cutting machine/engraving machine combination
US6464573B1 (en) * 2000-06-30 2002-10-15 Porter-Cable Corporation Guard attachment system with knurled clamp ring
DE10124439A1 (de) * 2001-05-18 2002-11-21 Bosch Gmbh Robert Handgeführtes Elektrowerkzeug mit Schutzhaube
DE10162632A1 (de) * 2001-12-20 2003-07-03 Hilti Ag Schleifgerät mit Absaughaube
US6699114B1 (en) * 2002-04-26 2004-03-02 Benedict Engineering Company, Inc. Pivotal guards for power hand tools with rotating discs
US6886258B2 (en) * 2002-11-15 2005-05-03 Richard C. Swanson Hand-held rotary hedge trimmer
DE10259520A1 (de) * 2002-12-19 2004-07-01 Robert Bosch Gmbh Elektrohandwerkzeugmaschine
CA2673618C (en) * 2003-03-03 2012-10-02 Credo Technology Corporation Angle attachment for power tool
DE10316182A1 (de) * 2003-04-09 2004-10-28 Robert Bosch Gmbh Handschleifmaschine mit Schutzhaube
DE10343060A1 (de) * 2003-09-16 2005-04-07 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube
DE10348395A1 (de) * 2003-10-17 2005-05-19 Robert Bosch Gmbh Schutzhaube für eine Elektrowerkzeugmaschine, Elektrowerkzeugmaschine sowie System mit Schutzhaube und Elektrowerkzeugmaschine
TWM251717U (en) * 2004-01-20 2004-12-01 Yue-Ting Chen Adjusting structure for hand-held cutter
US20070117499A1 (en) * 2005-11-23 2007-05-24 Sunmatch Industrial Co., Ltd. Rotary protecting hood of a pneumatic grinder
DE102005062458A1 (de) * 2005-12-27 2007-07-05 Robert Bosch Gmbh Schutzhaube für ein Handwerkszeug
DE102006022386A1 (de) 2006-05-12 2007-11-15 Robert Bosch Gmbh Schutzhaube für ein Handwerkzeug sowie Handwerkzeug mit Schutzhaube
DE502006006187D1 (de) * 2006-10-07 2010-04-01 Metabowerke Gmbh Elektrohandwerkzeuggerät, insbesondere ein Winkelschleifer mit einer Schutzhaube
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DE102007041840A1 (de) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube, insbesondere Winkelschleifer
DE102006053303A1 (de) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine für ein rotierendes Werkzeug mit Schutzhaube
DE102006053301A1 (de) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine für ein rotierendes Werkzeug mit Schutzhaube
DE102007000845A1 (de) * 2007-10-11 2009-04-16 Hilti Aktiengesellschaft Handwerkzeugmaschine
BRPI0818709B1 (pt) * 2007-10-22 2019-10-29 Makita Corp esmerilhadora com dispositivo de batente para cobertura protetora
DE102007052684A1 (de) * 2007-11-05 2009-05-07 Robert Bosch Gmbh Handwerkzeugmaschine
DE102007057032A1 (de) * 2007-11-27 2009-05-28 Robert Bosch Gmbh Handwerkzeugmaschine
DE102008040372A1 (de) * 2008-07-11 2010-01-21 Robert Bosch Gmbh Schutzhaubenverdrehsicherungsvorrichtung
DE102010030598A1 (de) * 2010-06-28 2011-12-29 Robert Bosch Gmbh Handwerkzeugschutzvorrichtung
JP5587079B2 (ja) * 2010-07-22 2014-09-10 株式会社マキタ 可動カバーの取付け構造および切断機
JP5579575B2 (ja) * 2010-11-02 2014-08-27 株式会社マキタ ディスクグラインダ
US9120202B2 (en) * 2011-06-30 2015-09-01 Black & Decker Inc. Shield assembly for a power tool
DE102011089758A1 (de) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Schutzhaubenverdrehsicherungsvorrichtung
DE102012210767A1 (de) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Schutzhaubenvorrichtung
DE102012210759A1 (de) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Schutzhaubenvorrichtung
JP6044718B2 (ja) * 2013-08-27 2016-12-14 日立工機株式会社 グラインダ
US9475172B2 (en) * 2014-07-15 2016-10-25 Milwaukee Electric Tool Corporation Adjustable guard for power tool
USD744800S1 (en) 2014-07-16 2015-12-08 Milwaukee Electric Tool Corporation Power tool blade guard
US10201889B2 (en) * 2014-08-06 2019-02-12 Sparky Guard, LLC Fully rotatable grinder guard assembly and method for making same
DE102020210634A1 (de) 2020-08-20 2022-02-24 Robert Bosch Gesellschaft mit beschränkter Haftung ªHandwerkzeugmaschine
CN117381050A (zh) * 2023-11-27 2024-01-12 佛山市艾倍科五金有限公司 基于废屑导流的五金配件手持切割装置及其使用方法

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Also Published As

Publication number Publication date
DE3780828D1 (de) 1992-09-03
WO1988003077A1 (en) 1988-05-05
JP2635640B2 (ja) 1997-07-30
US5005321A (en) 1991-04-09
ES2005658A6 (es) 1989-03-16
EP0333710A1 (de) 1989-09-27
DE3636601A1 (de) 1988-05-05
JPH02500503A (ja) 1990-02-22

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