EP1618990A1 - Outil motorisé portatif, en particulier meuleuse d'angle - Google Patents

Outil motorisé portatif, en particulier meuleuse d'angle Download PDF

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Publication number
EP1618990A1
EP1618990A1 EP05012497A EP05012497A EP1618990A1 EP 1618990 A1 EP1618990 A1 EP 1618990A1 EP 05012497 A EP05012497 A EP 05012497A EP 05012497 A EP05012497 A EP 05012497A EP 1618990 A1 EP1618990 A1 EP 1618990A1
Authority
EP
European Patent Office
Prior art keywords
locking
disc
hand tool
locking ring
tool according
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
EP05012497A
Other languages
German (de)
English (en)
Other versions
EP1618990B1 (fr
Inventor
Jiri Blazek
Manfred Kirchner
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.)
Narex Ceska Lipa AS
Original Assignee
Narex Ceska Lipa AS
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 Narex Ceska Lipa AS filed Critical Narex Ceska Lipa AS
Publication of EP1618990A1 publication Critical patent/EP1618990A1/fr
Application granted granted Critical
Publication of EP1618990B1 publication Critical patent/EP1618990B1/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
    • 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
    • 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
    • B24B23/028—Angle tools

Definitions

  • the invention relates to a hand tool, in particular angle grinder, with a drive shaft for driving a rotating tool during operation and a spindle shaft to the drive shaft, with a protective cover is removably connectable, which has a pluggable on the spindle neck guard collar and rotatable in the connected state and in succession The following angular positions is arranged latching.
  • angle grinders have a protective cover, which covers the grinding wheel with the exception of the attacking on the respective workpiece area and thus protects the user from injury.
  • the protective hood can be brought into the favorable for the respective workpiece machining rotational position. This twisting can be done by hand, the guard locked in the successive angular positions.
  • the present invention the object of the invention to provide a hand tool of the type mentioned above, which is as simple as possible with respect to the attachment and handling of the guard and allows tool-free attachment and removal of the guard.
  • the guard When attaching the guard to the power tool, the guard is placed with its guard collar in such a rotational position on the spindle neck that the guide member passes through the passage to the guide groove. If the protective cover is twisted out of this assembly rotary position, the guide element and over this the protective cover is secured in the axial direction on the spindle neck. Simultaneously with the attachment of the protective hood collar on the spindle neck, the driving member reaches the locking ring, so that the locking ring rotates when turning the guard and locked in each rotational position with the locking disc.
  • an electrically operated angle grinder 1 which is an elongated, at the same time serving as a handle housing part 2, in which a drive motor is housed, and then a machine head 3, in which a deflection gear is included, via which a perpendicular to the longitudinal direction of the housing part 2 verlauferide drive shaft 4 is driven.
  • the drive shaft 4 protrudes through a fixedly arranged on the underside of the machine head 3 spindle neck 5 to the outside.
  • the drive shaft 4 can be connected to a grinding wheel or, in the case of another hand tool, to another tool rotating during operation.
  • the region of the drive shaft 4 protruding in front of the spindle neck 5 has a thread onto which the grinding wheel, not shown, can be screwed.
  • the angle grinder 1 is associated with a protective hood 6, which can be removably connected to the coaxial with the drive shaft 4 spindle neck 5.
  • the protective cover 6 covers the grinding wheel towards the user.
  • the protective cover 6 releases the grinding wheel side opposite the machine head.
  • the protective hood 6 extends only over a part of the circumference, so that a circumferential area of the grinding wheel remains uncovered, with which the respective workpiece is machined.
  • the protective cover 6 has a protective hood collar 7, which is of annular design and is inserted onto the spindle neck 5.
  • a substantially radially projecting cover wall 8 is attached, which extends over only a portion of the circumference, so that the required for workpiece machining peripheral area remains free.
  • the outer circumference of the cover wall 8 is attached to a circular arc extending axially directed peripheral wall 9, which is associated with the grinding wheel circumference.
  • the circumferential wall 9 does not extend over the entire circumference of the grinding wheel and also leaves free the grinding wheel area required for workpiece machining.
  • the protective hood collar 7 is arranged coaxially with the drive shaft 4 on the spindle neck 5.
  • the protective hood collar 7 and thus the protective cover 6 can be rotated about the spindle neck 5, so that the peripheral region of the protective hood left free for the workpiece machining can be turned into the angular position required for the respective workpiece machining.
  • the guard performs, so to speak, a ratcheting motion, i. it automatically locks in the successive angular positions at short intervals, in such a way that the latching is automatically canceled again upon further rotation. In this way, the guard 6 keeps by itself in the set rotational position.
  • a circumferential, radially outwardly open guide groove 10 is arranged on the outer circumference of the spindle neck, which is accessible in the axial direction by one or more circumferentially distributed, axially directed passage recesses 11.
  • axial direction is meant in the present description, the axial direction of the drive shaft 4.
  • At the guard collar 7 at least one guide member 12 is arranged, wherein the number of guide members 12 of the number of passage openings 11 on the guard collar. 7 equivalent. In the illustrated case three distributed over the circumference arranged guide members 12 and accordingly three passage recesses 11 are provided.
  • the protective cover 6 To attach the protective hood collar 7 on the spindle neck 7, the protective cover 6 must be held in a mounting rotational position, in which the guide members 12 are arranged in the axial direction in alignment with the passage openings 11.
  • the guide members 12 are dimensioned so that they pass through the passage recesses 11, so that they pass through the passage recesses 11 to the guide groove 10 when attaching the protective hood collar 7. If you then twisted the protective cover 6, the guide members 12 are secured in the axial direction and are guided in the circumferential direction.
  • the protective cover 6 is in the assembly rotational position.
  • the open guard area is then turned back towards the user. In this position usually no workpiece machining takes place.
  • the protective hood 6 is rotated through approximately 180 °.
  • At the guard collar 7 at least one driving member 15 is arranged, which passes when attaching the guard collar 7 on the spindle neck 5 in rotational engagement with the locking ring 14, so that it is taken during rotation in the direction of rotation.
  • Each entrainment member 15 - in the embodiment, only one such entrainment member 15 is present - is assigned to the outer circumference of the locking ring 14, a rotary driving recess 16, in which the respective driving member 15 engages.
  • the driving member 15 is formed so narrow in the axial direction that it engages only on the locking ring 14.
  • the locking disk 13 and the locking ring 14 are in the axial direction outwardly of the guide groove 10 upstream.
  • the locking disc 13 is expediently located on the side facing away from the machine head 3 of the locking ring 14 and is thus in the axial direction outwardly preceded the locking ring.
  • the outer diameter of the locking disc 13 and the locking ring 14 substantially corresponds to the inner diameter of the protective hood collar 7.
  • the at least one push-through recess 17 of the fixed locking disk 13 is arranged in alignment with the at least one passage recess 11 through which the guide groove 10 is accessible.
  • the at least one push-through recess 18 of the rotatable locking ring 14, however, is arranged only in the assembly rotational position (eg, FIG.
  • each guide member 12 there is the locking ring 14 in the assembly rotational position when plugging or removing the guard collar 7 from the spindle neck 5 on the locking disc 13 and the locking ring 14 move past.
  • the locking ring 14 is, as already mentioned, arranged in view from below expediently behind the locking disc 13. Therefore, on the outer circumference of the locking disc 13, a through-hole 19 for inserting the arranged on the protective hood collar 7 driving member 15 is arranged so that the driving member 15 during assembly and disassembly of the protective cover 6 can move past the locking disc 13. If the diameter of the locking disk 13 were correspondingly smaller than the diameter of the locking ring 14, the through-hole 19 of the locking disk could be omitted.
  • the rotary driving recess 16 of the locking ring 14 is arranged in the assembly rotational position ( Figure 3) of the protective cover 6 in alignment with the through-recess 19 of the locking disc 13.
  • the driving member 15 engages behind the locking disc 13, you can see from the push-through recesses 17, which, however, may be smaller than the driving element 15.
  • guard 6 encloses the guard collar 7, the locking disc 13 and the locking ring 14.
  • the guide groove 10 can be enclosed.
  • the at least one guide member 12 and the at least one driving member 15 are arranged on the inside of the protective hood collar 7. They are arranged offset in the axial direction of the distance between the guide groove 10 and the locking ring 14 corresponding to each other.
  • the locking ring 14 rotates when turning the protective cover 6, as already mentioned, so to speak ratcheting past the locking disc 13.
  • a sliding ring 20 is arranged, on which the locking ring 14 is slidably mounted.
  • the locking ring 14 and the locking disc 13 are sufficiently firmly held against each other in the axial direction, so that the locking ring 14 in the individual angular positions can be rotated latching.
  • expediently extending in the axial direction fastening screws 21 are provided, which pass through the locking disc 13 and the locking ring 14 and then screwed to the locking disc and the locking ring in the spindle neck 5, so that the locking disc and the locking ring by means of the heads of the fastening screws 21 toward each other and held against the spindle neck.
  • three detent balls are arranged on the detent disk 13, distributed over the circumference and projecting in the axial direction towards the detent ring 14, which are assigned a ring of detent recesses 23 arranged sequentially in the circumferential direction on the detent ring 14 ,
  • the number of locking recesses 23 corresponds to the number of angular positions in which the protective cover 6 is locked.
  • the arrangement could also be reversed so that the locking balls on the locking ring and the locking recesses are arranged on the locking disc. Furthermore, it could also be in the place of the locking recesses 23 to latching recesses. Furthermore, the locking balls 22 could also be replaced by other locking projections. In addition, more or less than three locking balls 22 and locking projections could be present.
  • the locking balls 22 sit in each case in a spherical, to the locking ring 14 towards open indentation 24 of the locking disc 13 and are available from the respective indentation 24 to the locking ring 14 towards.
  • the latching recesses 23 are likewise expediently spherical indentations 25 on the latching ring 14.
  • each angular position of the protective hood 6 the locking balls 22 each engage in one of the locking recesses 23.
  • the detent balls 22 emerge from the detent recesses 23 and then latch into the respective next detent recesses 23.
  • the locking disc 13 is resilient at least in the region of the locking balls 22 in the axial direction.
  • the locking disc 13 expediently made of spring steel.
  • locking disk and the locking ring could be designed to be resilient in the axial direction.
  • the protective hood collar 7 is slotted and can be changed in diameter by means of a tensioning device 26 so that the protective hood collar 7, which is otherwise rotatable on the spindle neck 5, can be tightened on the spindle neck 5.
  • the protective hood collar 7 consists of strip-shaped material, whose end regions 27, 28 are angled radially outwards and lie opposite each other with the formation of a slot 29.
  • the distance between the two end regions 27, 28 can be changed by means of a clamping screw 30, which passes through the two end regions 27, 28.
  • the two end portions 27, 28 are arranged between the clamping screw head 31 and another end screwed onto the clamping screw 30 clamping nut 32, so that when screwing the clamping screw 30 relative to the clamping nut 32, the distance between the end portions 27, 28 changes.
  • a washer or the like may be arranged between the clamping screw head 31 and the facing end portion 27, .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP05012497A 2004-07-16 2005-06-10 Outil motorisé portatif, en particulier meuleuse d'angle Active EP1618990B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004034441A DE102004034441A1 (de) 2004-07-16 2004-07-16 Handwerkzeugmaschine, insbesondere Winkelschleifer

Publications (2)

Publication Number Publication Date
EP1618990A1 true EP1618990A1 (fr) 2006-01-25
EP1618990B1 EP1618990B1 (fr) 2007-03-07

Family

ID=35276504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05012497A Active EP1618990B1 (fr) 2004-07-16 2005-06-10 Outil motorisé portatif, en particulier meuleuse d'angle

Country Status (2)

Country Link
EP (1) EP1618990B1 (fr)
DE (2) DE102004034441A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1864754A1 (fr) * 2006-06-06 2007-12-12 Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO Carter de protection pour outil de meulage électrique
WO2008058910A1 (fr) * 2006-11-13 2008-05-22 Robert Bosch Gmbh Système de machine-outil portative
WO2009059838A1 (fr) * 2007-11-05 2009-05-14 Robert Bosch Gmbh Machine-outil portative
WO2009121432A1 (fr) 2008-03-31 2009-10-08 Robert Bosch Gmbh Machine-outil à main, notamment meuleuse d'angle guidée à la main
CN101607397A (zh) * 2008-06-20 2009-12-23 罗伯特·博世有限公司 工具机,特别是手持式工具机
CN101745840A (zh) * 2008-12-05 2010-06-23 罗伯特·博世有限公司 保护罩装置
WO2012019342A1 (fr) * 2010-08-11 2012-02-16 Bosch Power Tools (China) Co., Ltd. Meuleuse d'angle portative comprenant un capot de protection amélioré
CN103158071A (zh) * 2011-12-14 2013-06-19 株式会社牧田 研磨机
WO2013092056A1 (fr) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Dispositif anti-rotation de capot de protection
US8905824B2 (en) 2011-06-30 2014-12-09 Black & Decker Inc. Shield assembly for a power tool
EP3023196A1 (fr) * 2014-11-11 2016-05-25 Robert Bosch Gmbh Meuleuse d'angle dotee d'un prolongement
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
US10173298B2 (en) 2016-05-06 2019-01-08 Black & Decker Inc. Reversible lever for a guard assembly for a power tool

Families Citing this family (1)

* 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29513331U1 (de) * 1995-08-19 1996-12-12 Bosch Gmbh Robert Winkelschleiferschutzhaube
DE19946364A1 (de) * 1999-09-28 2001-03-29 Mets Owerke Gmbh & Co Schutzhaubenanordnung an einem Winkelschleifer
DE10158334C1 (de) * 2001-11-28 2003-02-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit Schutzhaube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29513331U1 (de) * 1995-08-19 1996-12-12 Bosch Gmbh Robert Winkelschleiferschutzhaube
DE19946364A1 (de) * 1999-09-28 2001-03-29 Mets Owerke Gmbh & Co Schutzhaubenanordnung an einem Winkelschleifer
DE10158334C1 (de) * 2001-11-28 2003-02-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit Schutzhaube

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007142524A1 (fr) * 2006-06-06 2007-12-13 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Capot de protection pour machine de meulage électrique
EP1864754A1 (fr) * 2006-06-06 2007-12-12 Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO Carter de protection pour outil de meulage électrique
US8221197B2 (en) 2006-11-13 2012-07-17 Robert Bosch Gmbh Hand-held power tool system
WO2008058910A1 (fr) * 2006-11-13 2008-05-22 Robert Bosch Gmbh Système de machine-outil portative
WO2008058909A1 (fr) * 2006-11-13 2008-05-22 Robert Bosch Gmbh Dispositif anti-rotation pour un capot de protection
WO2008058904A1 (fr) * 2006-11-13 2008-05-22 Robert Bosch Gmbh Dispositif anti-rotation pour un capot de protection
US8562395B2 (en) 2006-11-13 2013-10-22 Robert Bosch Gmbh Guard anti-rotation lock
US8465348B2 (en) 2006-11-13 2013-06-18 Robert Bosch Gmbh Guard anti-rotation lock
US7955162B2 (en) 2006-11-13 2011-06-07 Robert Bosch Gmbh Guard anti-rotation lock device
CN101534996B (zh) * 2006-11-13 2013-05-08 罗伯特·博世有限公司 防护罩防扭转装置及手持式工具机系统
WO2009059838A1 (fr) * 2007-11-05 2009-05-14 Robert Bosch Gmbh Machine-outil portative
WO2009121432A1 (fr) 2008-03-31 2009-10-08 Robert Bosch Gmbh Machine-outil à main, notamment meuleuse d'angle guidée à la main
RU2502589C2 (ru) * 2008-03-31 2013-12-27 Роберт Бош Гмбх Ручная машина, прежде всего угловая шлифовальная машина
CN101607397A (zh) * 2008-06-20 2009-12-23 罗伯特·博世有限公司 工具机,特别是手持式工具机
CN101745840A (zh) * 2008-12-05 2010-06-23 罗伯特·博世有限公司 保护罩装置
WO2012019342A1 (fr) * 2010-08-11 2012-02-16 Bosch Power Tools (China) Co., Ltd. Meuleuse d'angle portative comprenant un capot de protection amélioré
US9878423B2 (en) 2011-06-30 2018-01-30 Black & Decker Inc. Guard lock
US8905824B2 (en) 2011-06-30 2014-12-09 Black & Decker Inc. Shield assembly for a power tool
US9120202B2 (en) 2011-06-30 2015-09-01 Black & Decker Inc. Shield assembly for a power tool
CN103158071A (zh) * 2011-12-14 2013-06-19 株式会社牧田 研磨机
CN103158071B (zh) * 2011-12-14 2016-03-09 株式会社牧田 研磨机
WO2013092056A1 (fr) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Dispositif anti-rotation de capot de protection
US9333622B2 (en) 2011-12-23 2016-05-10 Robert Bosch Gmbh Protective hood rotation prevention device
EP3023196A1 (fr) * 2014-11-11 2016-05-25 Robert Bosch Gmbh Meuleuse d'angle dotee d'un prolongement
US10173298B2 (en) 2016-05-06 2019-01-08 Black & Decker Inc. Reversible lever for a guard assembly for a power tool
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
DE502005000442D1 (de) 2007-04-19
DE102004034441A1 (de) 2006-02-16
EP1618990B1 (fr) 2007-03-07

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