EP1965949A1 - Capot de protection dote d'un dispositif de serrage - Google Patents

Capot de protection dote d'un dispositif de serrage

Info

Publication number
EP1965949A1
EP1965949A1 EP06819248A EP06819248A EP1965949A1 EP 1965949 A1 EP1965949 A1 EP 1965949A1 EP 06819248 A EP06819248 A EP 06819248A EP 06819248 A EP06819248 A EP 06819248A EP 1965949 A1 EP1965949 A1 EP 1965949A1
Authority
EP
European Patent Office
Prior art keywords
rotation
protective hood
clamping ring
hood according
clamping
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
EP06819248A
Other languages
German (de)
English (en)
Other versions
EP1965949B1 (fr
Inventor
Sinisa Andrasic
Cornelius Boeck
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 EP1965949A1 publication Critical patent/EP1965949A1/fr
Application granted granted Critical
Publication of EP1965949B1 publication Critical patent/EP1965949B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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 invention relates to a protective hood for a tool according to the preamble of claim 1.
  • Protective hoods for tools with a rotary tool such as angle grinder
  • Such protective hoods have a covering area covering the rotary tool and a rotary tool releasing area.
  • the overlap area serves to protect the operator from material removal and flying sparks as well as from the parts of bursting rotary tools, such as grinding wheels.
  • the protective hood In order for the rotary tool release area, depending on the field of application of the hand tool and working position of the operator, to be in a favorable position relative to the workpiece to be machined, it is known to design the protective hood so that it can be mounted in different angular positions relative to the tool. For this purpose, designed as a clamping ring clamping devices for attachment to a machine neck of the tools are known.
  • DE 102 59 520 also describes an anti-twist device for determining the angular position of the protective hood relative to the tool.
  • This has the disadvantage that the clamping device is designed so that for releasing and attaching the guard on the machine neck of the tool a tool is required while defining the angular position of the protective hood, a lever clamping device is provided with a clamping lever arranged on a pawl as rotation. The handling of such a protective cover is expensive.
  • a protective hood for a hand tool with a rotary tool with a designed as a clamping ring clamping device for attachment to a machine neck of the tool, and with a rotation for fixing the angular position of the guard relative to the tools proposed in the non-depositing on the clamping ring to form the rotation at least one, with an anti-rotation element of the machine neck cooperable anti-rotation element is arranged.
  • an anti-rotation on the clamping ring itself results.
  • Cooperative means that the operator, a compound, in particular an operative connection can be made.
  • the anti-rotation element is designed as an increase and the anti-rotation counter element as a recess. This results in a clear assignment, for example by latching.
  • the anti-rotation element as a recess and the anti-rotation counter element as an increase.
  • the clamping ring as an open clamping ring.
  • the chip ring is not self-contained, but has an opening for the change in the circumference. This opening can be closed by a closing device, for example by a screw connection and / or by a lever mechanism, for the purpose of fastening the protective hood to the machine neck.
  • the clamping ring is at least partially formed as a clamping band.
  • tension band is meant a substantially elastic or resilient embodiment, for example in a design as a band or leaf spring or as a reversibly deformable sheet metal part or in a similar manner. This results in an always identical shape of a region of the clamping ring, regardless of whether it is open or closed, and a shape variable, namely designed as a clamping band.
  • a further preferred embodiment provides that the clamping ring has a lever clamping device.
  • a lever clamping device is essentially one in which a lever is articulated on one end region of the preferably open clamping ring, with an axis of rotation of the lever, and wherein in the region of the lever a further axis exists, in the region of which the other end of the clamping ring is articulated, so that when the lever is opened, the clamping device is opened and when the lever is closed, the clamping device is closed.
  • the clamping ring has a spring element on its inner wall.
  • a spring element ensures that the inner surface of the clamping ring lifts off from the outer surface of the machine neck by the spring force of the spring element, since the spring element arranged on the clamping ring acts on the outer wall of the machine neck with spring force and thus the clamping ring of the same pulls the trigger.
  • the spring element is a leaf or bow spring.
  • the spring width of the spring element is less than the ring height of the clamping ring. This means that the Federte of the spring element is smaller than the ring height of the clamping ring in the axial direction. This causes the spring is not the spring force of the full width of the clamping ring, but only in a region thereof is effective.
  • the spring element can be cooperated with recesses formed on the machine neck and / or at least one annular groove.
  • the machine neck has recesses and / or an annular groove into which the spring element engages when the tensioning device is correctly positioned.
  • the anti-rotation element is trapezoidal.
  • Trapezoidal tooth-shaped means that the anti-rotation element has the shape of a Trapezzahnes in cross section.
  • the anti-rotation element is trapezoidal shaped on one side. In this way it can be accomplished that the protective hood is easily rotatable in one direction with the clamping ring open, whereas in the other direction preferably a blocking effect occurs. Again, a slight slipping in and out is guaranteed in or out of the corresponding (s) anti-rotation counter element.
  • a preferred embodiment of the invention provides that the unilaterally trapezoidal-shaped formation has a steep section, which is aligned with the opening. This means that the flat rising part of the Trapezzahnes is oriented to the side facing away from the opening, the steep section but towards the opening. This ensures by the thus predetermined force curve that even with strong vibrations, the strap does not loosen and in particular the anti-rotation element can not slip out of the anti-rotation element, which would lead to a displacement of the guard and at worst to a release.
  • the arrangement can also be mirror-image (steep section away from the opening oriented); but this is not quite as advantageous.
  • a further preferred embodiment provides that on the inside of the clamping ring several anti-rotation elements of different increase are present. This means that several of the aforementioned anti-rotation elements in different axial extent in the clamping ring (to the imaginary axis of the rotary tool) are present.
  • a particularly preferred embodiment has a plurality of anti-rotation elements of different elevation, which have a rising height profile. This means that the height / extent of each anti-rotation element into the clamping ring is greater than the height of the preceding anti-rotation element. This results in an increasing height geometry of the anti-rotation elements, which allows a slight intentional displacement with only a small opening of the clamping ring, but nevertheless ensures a safe and complete engagement.
  • the anti-rotation element is cylindrical. It may be this standing on the clamping ring cylinder, ie those whose axis is perpendicular to the inner wall of the clamping ring, thus in the radial direction, or even those, for example, lying partially sunk in the axial direction. It is only important that a clear and secure locking when closing the clamping ring and a clear position assignment in a certain angular position takes place.
  • the invention further comprises a tool with a machine neck, wherein the machine neck has at least one anti-rotation counter element, which cooperates with at least one anti-rotation element.
  • Figure 1 is a protective hood with tensioning device.
  • FIG. 1 shows a protective hood 1 for a hand tool (not shown).
  • the protective hood has a hood body 2, which consists of an axial wall 3, with which a collar 4 on the inside circumference side and a collar 5 are integrally formed on the outside circumference side in one piece.
  • the hood body 2 approximately forms a semicircular ring segment, wherein the collar 4 bounds the axial wall on the inside circumference side and the collar 5 limits the axial wall on the outer peripheral side.
  • the collar 4 and the collar 5 are angled in opposite directions from the axial wall 3, wherein they each include approximately a 90 ° angle.
  • the collar 4 is encompassed by a tensioning device 6.
  • the clamping device 6 consists of a clamping ring 7 and a clamping band 8, wherein the clamping ring 7 is formed as an open clamping ring 9.
  • the clamping ring 7 has an opening 10, at one end of a bearing block 11 is mounted, in the bridging of the opening 10, a clamping pin 12 is inserted, which is formed at the opposite end of the clamping ring 7, which is designed as a clamping band 8, via a perpendicular to its longitudinal axis inserted into it transverse pin 13 is frictionally connected to an actuating handle 14.
  • the actuating handle 14 is articulated in a second bearing block 15 by means of a second transverse pin 16 at the opening end 17 of the clamping band 8.
  • the actuating handle 14 forms, together with the bearing block 11, the clamping pin 12, the transverse pin 13, the second bearing block 15 and the second transverse pin 16 via the opening 10, a lever clamping device 18.
  • the clamping ring 7 has anti-rotation locking elements 19 in the region of the clamping band 8. These are formed in the form of a unilateral Trapezzahnes 20 as an increase 25 on the inside of the clamping band 8, which means that the cross section of each anti-rotation element 19 forms a unilateral trapezoidal tooth 20, wherein the sloping side 21 of each one side trapezoidal tooth 20 is oriented away from the opening 10, so that the steep portion 22 of each unilateral trapezoidal tooth 20 is oriented in the direction of the opening 10.
  • a spring element 23 is further formed, the longitudinal extent of which rises along the inner shell wall 26 of the tension band 8.
  • the width b of the spring element 23 (narrow side) is less than the height h of the clamping band 8.
  • the arrangement of the spring element 23 in the region of different axial extent of the height h of the clamping ring 8 can be together with an annular groove, not shown, or other interventions on the machine neck, not shown, form a coding system that allows the use of the protective cover 1 only with such machines, for the specification (in particular maximum speed), the protective hood is built and approved.
  • a spring element 23 may also be provided in one piece with the strap 8 device connected in the form of a nose 24. It is only important in this case that a defined arrangement of a nose-shaped element having a certain width b as an axial extension takes place in the region of the height h of the clamping ring 8 in such a way that a defined assignment to a counter-element on the machine neck is possible.
  • the radius of the clamping ring is extended, so that the clamping ring with the protective cover 1 can be slipped over the machine neck, not shown.
  • the operating handle 14 is to close, whereby the radius of the Clamping ring is reduced again, and the anti-rotation elements 19 engage in the anti-rotation counter-elements of the machine neck, not shown, and the spring element 23 and the nose 24 in a non-illustrated counter element, such as an annular groove, not shown on the machine neck.
  • a regulating screw not shown here in the region of the clamping pin 12 and preferably of the bearing block 11 may be provided, for example by execution of the clamping pin 12 as a threaded pin / screw. As a result, a fine adjustment of the clamping diameter is possible.
  • the protective cover By forming a plurality of anti-rotation counter-elements on the machine neck, not shown, it is possible, the protective cover after opening the clamping ring 7 (namely, by operating gene of the actuating handle 14) to bring in different angular positions relative to the tools, this being possible in such an area, as the anti-rotation elements 19 correspond to the anti-rotation counter-elements not shown. Where such are not formed on the machine neck, the anti-rotation elements 19 can not engage, so that closing of the clamping ring is not possible and the protective hood can not be fixed in such a faulty manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Sawing (AREA)

Abstract

L'invention concerne un capot de protection pour outil manuel, qui présente un outil de rotation, un dispositif de serrage configuré comme une bague de serrage à fixer sur le collet de machine de l'outil manuel et un blocage anti-rotation qui définit la position angulaire du capot de protection par rapport à l'outil manuel. On propose selon l'invention de disposer de manière non déplaçable sur la bague de serrage (7) un élément anti-rotation (19) qui coopère avec un élément anti-rotation (19) du col de machine pour former le blocage anti-rotation. L'invention concerne en outre un outil manuel doté d'un tel capot de protection (1).
EP06819248A 2005-12-23 2006-11-03 Capot de protection dote d'un dispositif de serrage Active EP1965949B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005061867A DE102005061867A1 (de) 2005-12-23 2005-12-23 Schutzhaube mit Spannvorrichtung
PCT/EP2006/068083 WO2007073970A1 (fr) 2005-12-23 2006-11-03 Capot de protection dote d'un dispositif de serrage

Publications (2)

Publication Number Publication Date
EP1965949A1 true EP1965949A1 (fr) 2008-09-10
EP1965949B1 EP1965949B1 (fr) 2011-01-19

Family

ID=37734942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819248A Active EP1965949B1 (fr) 2005-12-23 2006-11-03 Capot de protection dote d'un dispositif de serrage

Country Status (5)

Country Link
US (1) US7628682B2 (fr)
EP (1) EP1965949B1 (fr)
CN (1) CN101346212B (fr)
DE (2) DE102005061867A1 (fr)
WO (1) WO2007073970A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006027576A1 (de) * 2006-06-14 2007-12-20 Robert Bosch Gmbh Schutzhauben-Befestigungsvorrichtung
DE102006053305A1 (de) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube, insbesondere Winkelschleifer
CN101868324B (zh) * 2007-11-21 2013-08-14 日立工机株式会社 包括砂轮防护件的动力工具
DE102008002468A1 (de) * 2008-06-17 2009-12-24 Robert Bosch Gmbh Werkzeugmaschine, insbesondere Handwerkzeugmaschine
DE102009017299A1 (de) * 2009-04-11 2010-10-21 Metabowerke Gmbh Schutzhaube für Elektrohandwerkzeuggeräte und Elektrohandwerkzeuggerät
JP5297392B2 (ja) * 2009-07-06 2013-09-25 株式会社マキタ サンダー
US9038275B2 (en) * 2011-09-07 2015-05-26 Dustless Depot, Llc Reciprocating saw dust shroud
DE102011089758A1 (de) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Schutzhaubenverdrehsicherungsvorrichtung
DE102012210767A1 (de) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Schutzhaubenvorrichtung
DE102012210771A1 (de) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Schutzhaubenvorrichtung
DE102012210759A1 (de) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Schutzhaubenvorrichtung
US10201889B2 (en) 2014-08-06 2019-02-12 Sparky Guard, LLC Fully rotatable grinder guard assembly and method for making same
USD816453S1 (en) 2016-09-15 2018-05-01 Dustless Depot, Llc Circular saw dust shroud
US10293421B2 (en) 2016-09-15 2019-05-21 Dustless Depot, Llc Circular saw dust collection shroud
DE102017213747A1 (de) * 2017-08-08 2019-02-14 Robert Bosch Gmbh Schutzvorrichtung für eine Handwerkzeugmaschine
CN108500796A (zh) * 2018-04-27 2018-09-07 湖州南浔创星机械有限公司 一种机械配件加工用打磨机
USD908149S1 (en) 2018-10-23 2021-01-19 Dustless Depot Llc Angle grinder dust shroud with variable position slots for mounting brackets
US11123839B2 (en) * 2018-10-23 2021-09-21 Dustless Depot Llc Grinder dust shroud with input shaft gasket and adjustable mounting mechanism
US11273505B2 (en) 2019-03-27 2022-03-15 Dustless Depot, Llc Circular saw dust collection shroud

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021510A1 (de) * 1990-07-05 1992-01-09 Bosch Gmbh Robert Spannvorrichtung zum festspannen einer schutzhaube am spannhals einer handwerkzeugmaschine
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
DE10235923B4 (de) * 2002-08-06 2006-04-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit einer Schutzhaube
DE10259520A1 (de) * 2002-12-19 2004-07-01 Robert Bosch Gmbh Elektrohandwerkzeugmaschine
DE10343060A1 (de) * 2003-09-16 2005-04-07 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007073970A1 *

Also Published As

Publication number Publication date
US7628682B2 (en) 2009-12-08
CN101346212A (zh) 2009-01-14
EP1965949B1 (fr) 2011-01-19
WO2007073970A1 (fr) 2007-07-05
DE102005061867A1 (de) 2007-07-05
CN101346212B (zh) 2013-07-24
DE502006008782D1 (de) 2011-03-03
US20080207098A1 (en) 2008-08-28

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