EP1618990B1 - 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
EP1618990B1
EP1618990B1 EP05012497A EP05012497A EP1618990B1 EP 1618990 B1 EP1618990 B1 EP 1618990B1 EP 05012497 A EP05012497 A EP 05012497A EP 05012497 A EP05012497 A EP 05012497A EP 1618990 B1 EP1618990 B1 EP 1618990B1
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EP
European Patent Office
Prior art keywords
locking
hand
machine tool
locking ring
tool according
Prior art date
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Active
Application number
EP05012497A
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German (de)
English (en)
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EP1618990A1 (fr
Inventor
Jiri Blazek
Manfred Kirchner
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Narex Ceska Lipa AS
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Narex Ceska Lipa AS
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Application filed by Narex Ceska Lipa AS filed Critical Narex Ceska Lipa AS
Publication of EP1618990A1 publication Critical patent/EP1618990A1/fr
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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 successive Angle positions is arranged latching, wherein on the circumference of the spindle neck a circumferential, radially outwardly open and accessible by at least one axial naturalung in the axial direction and the guard hood at least one suitable by the respective passage recess and guided during rotation of the connected guard in the guide groove guide member is arranged ,
  • 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, with the guard locked in the successive angular positions.
  • the guard has radially outwardly open tooth gaps, which is assigned a manually operable housing-fixed locking device with a latch and associated control button.
  • the latch engages in one of the tooth gaps.
  • the locking lug exits so that the protective cover can be rotated.
  • the present invention the object of providing a hand tool of the type mentioned above, in which the guard not only tool-free up and can be removed but also can be easily rotated in handling in different angular positions. Furthermore, the effort required for this should be relatively low.
  • 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 you twist the protective cover from this Monday-rotational position, the guide member and this is the guard in the axial direction secured to the spindle neck. Simultaneously with the attachment of the guard 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 extending 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, .

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  • 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)

Claims (16)

  1. Outil motorisé portatif, en particulier meuleuse d'angle, avec un arbre d'entraînement (4) pour entraîner un outil tournant en service et un culot de broche (5) coaxial à l'axe d'entraînement (4), auquel un capot protecteur (6) peut être relié de manière amovible, capot qui présente un collet de capot protecteur (7) pouvant être enfiché sur le culot de broche (5) et, à l'état assemblé, est monté de manière rotative et avec crantage dans des positions angulaires successives, dans lequel une rainure de guidage (10) périphérique, ouverte radialement vers l'extérieur et accessible dans la direction axiale à travers au moins un évidement axial de passage (11), est prévue sur la périphérie du culot de broche (5) et dans lequel est prévu au moins un organe de guidage (12) passant à travers l'évidement de passage (11) respectif et guidé dans la rainure de guidage (10) lors de la rotation du capot protecteur (6) assemblé, caractérisé en ce qu'un disque de crantage stationnaire (13) et une bague de crantage (14) rotative se mettant en prise avec le disque de crantage (13) dans la direction axiale lors de la rotation dans des positions angulaires successives sont placés sur le culot de broche (5) l'un derrière l'autre dans la direction axiale, de manière coaxiale à l'arbre d'entraînement (4) et avancés vers l'extérieur dans la direction axiale de la rainure de guidage (10), et en ce qu'au moins un organe d'entraînement (15) est placé sur le collet de capot protecteur (7), organe qui se met en prise d'entraînement rotatif avec la bague de crantage (14) lors de l'enfichage du collet de capot protecteur (7).
  2. Outil motorisé portatif selon la revendication 1, caractérisé en ce que le disque de crantage (13) et la bague de crantage (14) sont avancés dans la direction axiale vers l'extérieur par rapport à la rainure de guidage (10).
  3. Outil motorisé portatif selon la revendication 2, caractérisé en ce que sur la périphérie extérieure du disque de crantage (13) et/ou de la bague de crantage (14) est placé au moins un évidement d'enfichage (17, resp. 18) ouvert sur la périphérie pour enficher l'organe de guidage (12) au nombre d'au moins un lors de la mise en place ou du retrait du capot protecteur (6), dans lequel l'évidement d'enfichage (17) au nombre d'au moins un du disque de crantage stationnaire (13) est placé en alignement avec l'évidement de passage (11) au nombre d'au moins un et l'évidement d'enfichage (18) au nombre d'au moins un de la bague de crantage (14) est placé, dans une position angulaire de montage du capot protecteur (6), en alignement avec l'évidement de passage (11) au nombre d'au moins un.
  4. Outil motorisé portatif selon l'une des revendications 1 à 3, caractérisé en ce que le disque de crantage (13) est avancé dans la direction axiale vers l'extérieur par rapport à la bague de crantage (14).
  5. Outil motorisé portatif selon l'une des revendications 1 à 4, caractérisé en ce que le disque de crantage (13) et/ou la bague de crantage sont réalisés élastiques dans la direction axiale.
  6. Outil motorisé portatif selon la revendication 5, caractérisé en ce que le disque de crantage (13) et/ou la bague de crantage sont fabriqués en acier à ressort.
  7. Outil motorisé portatif selon l'une des revendications 1 à 6, caractérisé en ce que le disque de crantage (13) et la bague de crantage (14) sont fixés au culot de broche (5) et tenus l'un par rapport à l'autre au moyen de vis de fixation (21) traversant le disque de crantage et la bague de crantage.
  8. Outil motorisé portatif selon l'une des revendications 1 à 7, caractérisé en ce que sur la périphérie extérieure de la bague de crantage (14) est placé au moins un évidement (16) d'entraînement rotatif pour la venue en prise de l'organe d'entraînement (25) au nombre d'au moins un.
  9. Outil motorisé portatif selon l'une des revendications 4 à 8, caractérisé en ce que sur la périphérie extérieure du disque de crantage (13) est prévu au moins un évidement d'enfichage (19) pour enficher l'organe d'entraînement (15) au nombre d'au moins un.
  10. Outil motorisé portatif selon la revendication 9, caractérisé en ce que l'évidement d'entraînement en rotation (16) au nombre d'au moins un de la bague de crantage (14) est placé, dans une position en rotation de montage du capot protecteur (6), en alignement avec l'évidement d'enfichage (19) au nombre d'au moins un du disque de crantage (13).
  11. Outil motorisé portatif selon l'une des revendications 1 à 10, caractérisé en ce que, le capot protecteur (6) étant assemblé, le collet (7) du capot protecteur entoure le disque de crantage (13) et la bague de crantage (14).
  12. Outil motorisé portatif selon la revendication 11, caractérisé en ce que l'organe de guidage (12) au nombre d'au moins un et l'organe d'entraînement (15) au nombre d'au moins un sont placés sur la face interne du collet de capot protecteur.
  13. Outil motorisé portatif selon l'une des revendications 1 à 12, caractérisé en ce que la face de la bague de crantage (14) opposée au disque de crantage (13) s'appuie une bague de glissement (20).
  14. Outil motorisé portatif selon l'une des revendications 1 à 13, caractérisé en ce qu'au moins une saillie de crantage (bille de crantage 22) en saillie dans la direction axiale est placée sur le disque de crantage (13) ou la bague de crantage et sur la bague de crantage (14) resp. sur le disque de crantage est placée une couronne d'évidements ou de renfoncements de crantage (23) se suivant dans la direction circonférentielle et coopérant avec la saillie de crantage au nombre d'au moins une.
  15. Outil motorisé portatif selon la revendication 14, caractérisé en ce que la saillie de crantage au nombre d'au moins une est formée par une bille de crantage (22) montée sur le disque de crantage (13) ou la bague de crantage.
  16. Outil motorisé portatif selon l'une des revendications 1 à 15, caractérisé en ce que le collet de capot protecteur (7) est fendu et est de diamètre variable au moyen d'un dispositif de serrage (26), de sorte que le capot protecteur (6) peut être serré sur le culot de broche (5) dans la position angulaire respective.
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 EP1618990A1 (fr) 2006-01-25
EP1618990B1 true EP1618990B1 (fr) 2007-03-07

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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

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2463151C2 (ru) * 2006-11-13 2012-10-10 Роберт Бош Гмбх Обрабатывающая система на базе ручной машины

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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
DE102006027576A1 (de) 2006-06-14 2007-12-20 Robert Bosch Gmbh Schutzhauben-Befestigungsvorrichtung
DE102007052685A1 (de) * 2007-11-05 2009-05-07 Robert Bosch Gmbh Handwerkzeugmaschine
DE102008000888A1 (de) 2008-03-31 2009-10-01 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere handgeführte Winkelschleifmaschine
DE102008002548B4 (de) * 2008-06-20 2021-11-11 Robert Bosch Gmbh Werkzeugmaschine, insbesondere Handwerkzeugmaschine
DE102008044403A1 (de) * 2008-12-05 2010-06-10 Robert Bosch Gmbh Schutzhaubenvorrichtung
EP2603354A1 (fr) * 2010-08-11 2013-06-19 Bosch Power Tools (China) Co., Ltd. Meuleuse d'angle portative comprenant un capot de protection amélioré
US9120202B2 (en) 2011-06-30 2015-09-01 Black & Decker Inc. Shield assembly for a power tool
CN103158071B (zh) * 2011-12-14 2016-03-09 株式会社牧田 研磨机
DE102011089758A1 (de) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Schutzhaubenverdrehsicherungsvorrichtung
DE102014222987A1 (de) * 2014-11-11 2016-05-12 Robert Bosch Gmbh Winkelschleifer mit einem Verlängerungsabschnitt
EP3251791B1 (fr) 2016-05-06 2019-03-27 Black & Decker Inc. Levier réversible pour un ensemble de protection d'un outil électrique
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

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Publication number Priority date Publication date Assignee Title
DE29513331U1 (de) * 1995-08-19 1996-12-12 Robert Bosch Gmbh, 70469 Stuttgart Winkelschleiferschutzhaube
DE19946364B4 (de) * 1999-09-28 2008-09-18 Metabowerke Gmbh Schutzhaubenanordnung an einem Winkelschleifer
DE10158334C1 (de) * 2001-11-28 2003-02-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit Schutzhaube

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2463151C2 (ru) * 2006-11-13 2012-10-10 Роберт Бош Гмбх Обрабатывающая система на базе ручной машины
RU2465117C2 (ru) * 2006-11-13 2012-10-27 Роберт Бош Гмбх Устройство для стопорения узла защитного кожуха от проворачивания
RU2465118C2 (ru) * 2006-11-13 2012-10-27 Роберт Бош Гмбх Устройство для стопорения защитного кожуха от проворачивания
CN101534998B (zh) * 2006-11-13 2013-12-18 罗伯特·博世有限公司 手持式工具机系统

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Publication number Publication date
EP1618990A1 (fr) 2006-01-25
DE502005000442D1 (de) 2007-04-19
DE102004034441A1 (de) 2006-02-16

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