EP2794188B1 - Dispositif anti-rotation de capot de protection - Google Patents

Dispositif anti-rotation de capot de protection Download PDF

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Publication number
EP2794188B1
EP2794188B1 EP12791461.2A EP12791461A EP2794188B1 EP 2794188 B1 EP2794188 B1 EP 2794188B1 EP 12791461 A EP12791461 A EP 12791461A EP 2794188 B1 EP2794188 B1 EP 2794188B1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping element
rotation prevention
unit
rotation
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.)
Not-in-force
Application number
EP12791461.2A
Other languages
German (de)
English (en)
Other versions
EP2794188A1 (fr
Inventor
Daniel BARTH
Joachim Schadow
Sinisa Andrasic
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 EP2794188A1 publication Critical patent/EP2794188A1/fr
Application granted granted Critical
Publication of EP2794188B1 publication Critical patent/EP2794188B1/fr
Not-in-force 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
    • 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
    • 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

Definitions

  • a guard anti-rotation device of a machine tool in particular an angle grinder, which comprises a tensioning of a guard unit clamping unit comprising a clamping element, a rotation locking unit having an anti-rotation element, and a movement coupling unit, which is provided, in an operating state that To move anti-rotation element in response to movement of the clamping element.
  • the WO 2008/058793 discloses a guard anti-rotation device according to the preamble of claim 1.
  • the invention is based on a guard anti-rotation locking device of a machine tool, in particular an angle grinder, with at least one clamping unit provided for tightening a guard unit, comprising at least one clamping element, with at least one anti-rotation unit having at least one anti-rotation element, and with at least one movement coupling unit to the is provided to move the anti-rotation element in at least one operating state in response to a movement of the clamping element.
  • the guard anti-rotation device comprises at least one securing unit which is provided, in at least one operating state, the anti-rotation element during a movement of the Clamping element in a release direction of the clamping element at least as far as possible against movement along a direction of decoupling of the anti-rotation from an anti-rotation position of the anti-rotation out to secure.
  • securing unit should in particular define a unit which secures a protective hood unit by means of positive locking and / or by means of a force fit to protect an operator during machining of a workpiece on the machine tool, in particular on a clamping neck of the machine tool.
  • a clamping force is generated for a tightening of the protective hood unit.
  • the tensioning element can in this case be designed as a tensioning screw, as a tensioning lever, as a bayonet locking element, etc.
  • the further clamping element is preferably designed as a tension band.
  • the clamping band is preferably fixed by means of a cohesive connection, such as by means of a welded connection, an adhesive connection, etc., to the protective hood unit.
  • the clamping element designed as a further clamping element is fixed by means of another, a person skilled in the sense appearing connection to the protective hood unit.
  • anti-rotation unit is intended here to define in particular a unit which largely prevents twisting of the protective hood unit in a mounted state relative to a clamping neck of the machine tool in the event of damage to a machining tool arranged on a tool holder of the machine tool by means of a positive and / or non-positive connection, in particular in addition to the clamping unit.
  • a positive and / or non-positive connection of the anti-rotation unit is achieved by engaging the anti-rotation in a arranged on the clamping neck of a tool holder of the machine tool Verfitterssaus predominantlyung.
  • a "damage case of a machining tool” is to be understood here in particular as a bursting of the machining tool during operation of the machine tool, wherein individual machining tool parts are thereby thrown outwards due to a rotation of the machining tool.
  • a position of the protective hood unit is largely maintained relative to the clamping neck of the machine tool during the event of damage of the machining tool by means of the anti-rotation unit.
  • release direction should in particular define a direction in which the tensioning element is moved to release a tension force generated by the interaction of the tensioning element and the further tensioning element for tightening the guard unit.
  • the release direction is preferably formed by a direction of rotation of the clamping element about a longitudinal axis of the clamping element.
  • the clamping element is preferably formed rotationally symmetrical to the longitudinal axis.
  • decoupling direction is to be understood here in particular as a direction along which the anti-rotation element is moved to release an anti-twist device of the protective hood unit relative to the clamping neck of the tool holder of the portable machine tool.
  • the anti-rotation element is preferably moved along the decoupling direction out of the anti-rotation recess arranged on the clamping neck of the tool holder of the machine tool, in particular pivoted out.
  • the release direction of the clamping element is identical to the decoupling direction of the anti-rotation element.
  • the anti-rotation element is secured by means of the securing unit in at least one operating state in a position relative to the clamping element and / or relative to the further clamping element.
  • the guard anti-rotation device By means of the embodiment according to the invention of the guard anti-rotation device, it is possible reliably to ensure that an anti-rotation position of the anti-rotation element is maintained.
  • the anti-rotation position of the anti-rotation element due to unintentional operation of the clamping element and / or as a result of operational vibrations generated during operation of the machine tool can be maintained.
  • a secure movement of the anti-rotation element can be achieved in a Verwar Anlagensgna due to the movement dependence of the anti-rotation of the clamping element.
  • at least substantially automatic movement of the anti-rotation element can be achieved by the movement-dependent unit as a result of a tightening of the protective hood unit on a clamping neck of the machine tool.
  • the securing unit has at least one securing element, which is arranged on a cooperating with the clamping element further clamping element of the clamping unit.
  • the securing element is preferably provided, as a result of a form-locking connection with the anti-rotation element in at least one operating state, to secure the anti-rotation element at least as far as possible against movement along the decoupling direction of the anti-rotation element out of the anti-rotation position of the anti-rotation element during movement of the clamping element in the release direction of the clamping element.
  • the securing element secures the VerFEgselement by means of a non-positive connection, at least in an operating condition against movement along the decoupling direction of the anti-rotation from the anti-rotation position of the anti-rotation.
  • the guard anti-rotation lock device locking of the anti-rotation locking element in the anti-rotation position can advantageously be achieved in at least one operating state.
  • the securing element is formed integrally with the further clamping element.
  • integral should be understood to mean, in particular, at least materially bonded, for example by a welding process, an adhesion process, an injection process and / or another process that appears expedient to the person skilled in the art, and / or advantageous molded in one piece, such as by a one-piece production and / or by a single or multi-component injection molding process, and advantageously a single parison.
  • the securing element is formed by a separately formed for further clamping element component, which is fixed by means of a, one skilled in the art seem appropriate mounting technology to the other clamping element.
  • the securing unit has at least one decoupling element which is provided to decouple, in at least one operating state, a movement of the anti-rotation element in a decoupling position of the anti-rotation element at least along the decoupling direction of the anti-rotation element from a movement of the clamping element along the release direction of the clamping element.
  • the clamping element is moved relative to the anti-rotation element upon actuation of the clamping element as a result of a positive connection of the anti-rotation element along the decoupling direction with the decoupling element in the decoupling position of the anti-rotation element.
  • a movement of the anti-rotation element independent movement of the clamping element along the release direction in the decoupling position of the anti-rotation element to release a provided for tightening the guard unit clamping force.
  • a movement limitation of the anti-rotation element along a movement distance of the anti-rotation element can be achieved, in particular a movement distance starting from the anti-rotation position in the decoupling position. In this way, it can be ensured, in particular, that the anti-rotation element moves as far as the unlocking position of the anti-rotation element when the clamping element moves in the release direction.
  • the decoupling element is arranged on a cooperating with the clamping element further clamping element of the clamping unit.
  • the decoupling element is formed integrally with the further clamping element.
  • the decoupling element is preferably integrally formed on an at least substantially perpendicular to a guard neck extending clamping element end of the other clamping element.
  • the decoupling element is arranged at another, a professional appear appropriate sense position. It can be advantageously achieved a compact fuse unit.
  • the anti-rotation element has at least one stop surface which cooperates in at least one operating state with at least one securing element of the securing unit.
  • a positive connection can be used to secure the anti-rotation element in the anti-rotation position of the anti-rotation element.
  • the anti-rotation element is positively and / or non-positively coupled to the clamping element.
  • the anti-rotation element is non-positively coupled by means of a stain coating of the clamping element or by means of a thread of the anti-rotation element with the clamping element.
  • the thread preferably has at least one pitch differing from a thread of the clamping element in order to realize a stiff thread in at least one direction.
  • the anti-rotation element is coupled by means of other, one skilled in the art appear reasonable options for the realization of the movement coupling unit positively and / or non-positively with the clamping element. It can be advantageously achieved a low-cost motion coupling unit.
  • the anti-rotation element is mounted movably in at least one operating state relative to a further clamping element.
  • the anti-rotation element is pivotally mounted in at least one operating state relative to the further clamping element.
  • the movement coupling unit is provided to pivot the anti-rotation element in at least one operating state as a result of a rotational movement of the clamping element in a Verwar Anlagensgna. It can be achieved structurally simple movement of the anti-rotation element in the anti-rotation position.
  • the anti-rotation element preferably engages in the anti-rotation position in at least one anti-rotation recess arranged on the clamping neck of the tool holder.
  • the anti-rotation element has at least one pivot axis which extends at least substantially parallel to a longitudinal axis of the clamping element.
  • substantially parallel is to be understood here as meaning, in particular, an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction relative to the reference direction is a deviation, in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.
  • a compact arrangement in particular an arrangement of the anti-rotation element on the clamping element, can be achieved.
  • the invention is based on a machine tool system having at least the protective hood anti-rotation device according to the invention, with at least one machine tool, in particular an angle grinder, and with at least one protective hood unit.
  • the machine tool is preferably designed as a portable machine tool, in particular as a portable, hand-held machine tool.
  • a "portable machine tool” is to be understood here in particular as meaning a machine tool for machining workpieces, which can be transported without transport machine by an operator.
  • the portable power tool has a mass which is less than 40 kg, preferably less than 10 kg and particularly preferably less than 7 kg.
  • the protective hood anti-rotation device according to the invention and / or the machine tool system according to the invention should / should not in this case be limited to the application and embodiment described above.
  • the guard anti-rotation device according to the invention and / or the machine tool system according to the invention may have a number deviating from a number of individual elements, components and units specified herein for fulfilling a mode of operation described herein.
  • FIG. 10 shows a machine tool system including a machine tool 12 formed by a portable machine tool configured as an angle grinder, a guard unit 14, and a guard anti-rotation device 10.
  • the guard anti-rotation device 10 of the machine tool system comprises at least one clamping unit 16 for tightening the guard unit 14, which has at least one clamping element 18, at least one anti-rotation unit 20, which has at least one anti-rotation element 22, and at least one movement coupling unit 24, which is provided, the anti-rotation element 22 in at least one operating state in response to a movement of the clamping element 18 to move.
  • the clamping unit 16 also has at least one further clamping element 34.
  • the anti-rotation element 22 is in this case formed separately from the clamping element 18 and separated from the further clamping element 34.
  • the protective hood unit 14 is in a state arranged on the machine tool 12 by means of an interaction of the clamping element 18 and the further clamping element 34 in a manner already known to a person skilled in the art in at least one position by means of a positive and / or non-positive connection to a clamping collar 98 a tool holder 42 of the machine tool 12 clamped.
  • the machine tool 12 embodied as an angle grinder further comprises a handle housing 44, a drive housing 46 and a driven housing 48.
  • a handle-shaped grip region 50 of the handle housing 44 forms a main handle of the machine tool 12.
  • the main handle extends at least substantially from a connection region 52 of the handle housing 44 in a direction away from the connection region 52 direction to a side 54 of the handle housing 44, on which a cable as an angle grinder trained machine tool 12 is arranged for power supply.
  • the handle-shaped handle portion 50 of the handle housing 44 is inclined at an angle smaller than 30 ° relative to a main extension direction 56 of the machine tool 12.
  • the handle housing 44 in addition to the handle-shaped handle portion 50 a bow-shaped portion 58 which is integrally formed on the handle-shaped handle portion 50.
  • the bow-shaped portion 58 has an L-shaped configuration, which extends starting from a the connection region 52 of the handle housing 44 opposite end of the handle-shaped handle portion 50 L-shaped in the direction of the connection region 52.
  • Extending out of the output housing 48 is an output shaft 60 designed as a spindle of an output unit 62 of the machine tool 12, to which a machining tool (not shown here) can be fixed to a machining of a workpiece (not shown here).
  • the machining tool can be designed as a grinding wheel, as a cutting wheel or as a polishing pad.
  • the machine tool 12 comprises the drive housing 46 for receiving a drive unit 64 of the machine tool 12 and the output housing 48 for receiving the output unit 62.
  • the drive unit 64 is provided to drive the machining tool via the output unit 62 in rotation.
  • the machining tool can in this case by means of a fastener (not shown here) for machining a workpiece rotatably connected to the output shaft 60.
  • the machining tool can be rotationally driven in an operation of the machine tool 12.
  • the output unit 62 is connected to the drive unit 64 in a manner already known to a person skilled in the art by means of a drive element (not shown here in detail) designed as a pinion and rotatingly drivable.
  • an auxiliary handle 66 is arranged on the output housing 48. The auxiliary handle 66 extends in a state mounted on the output housing 48 transversely to the main extension direction 56 of the machine tool 12.
  • FIG. 2 shows a detailed view of the protective hood unit 14, on which the guard anti-rotation device 10 is arranged in a arranged on a clamping neck 98 of the tool holder 42 of the machine tool 12 state.
  • the protective hood unit 14 has a semicircular protective hood covering area 68 which, in a state fixed to the clamping neck 98 of the tool holder 42, is coupled to the output shaft 60 Covering tool along an angular range of about 180 °.
  • the protective cover area 68 extends in a state fixed to the clamping neck 98 of the tool holder 42 of the protective hood unit 14 in a plane extending at least substantially perpendicular to a rotation axis of the output shaft 60.
  • the protective hood unit 14 has at least one protective hood side wall 70, which is arranged at least essentially transversely to a main extension surface 72 of the protective hood covering region 68 and in a state fixed to the clamping neck 98 of the tool holder 42, a machining tool coupled to the output shaft 60 radially along an angular range of approx 180 ° surrounds. Furthermore, the protective hood unit 14 has a protective hood collar 74, which is arranged transversely to the protective hood side wall 70 on a side of the protective hood side wall 70 facing away from the protective hood covering region 68 at least substantially parallel to the protective hood covering region 68.
  • the guard collar 74 viewed in a fixed to the clamping neck 98 of the tool holder 42 state of the guard unit 14, starting from the guard side wall 70 radially inwardly toward the output shaft 60.
  • the guard unit 14 includes a guard neck 76, which at the Schutzhaubenabdeck Scheme 68th is arranged.
  • the protective hood neck 76 extends at least substantially perpendicularly to the main extension surface 72 of the protective hood covering region 68 and at least substantially parallel to the protective hood side wall 70.
  • the further clamping element 34 is fixed to the protective hood neck 76 in a form-fitting, force-locking and / or material-locking manner.
  • the further clamping element 34 is designed as a clamping band, which is fixed to an outer contour of the protective hood neck 76. Furthermore, the protective hood unit 14 has an axial securing extension (not shown here in detail), which is integrally formed on the protective hood neck 76.
  • the Axialtechnischsfortsatz extends starting from the guard neck 76, viewed in a fixed to the clamping neck 98 of the tool holder 42 state of the guard unit 14, in the direction of the output shaft 60.
  • the Axialommesfortsatz is provided in a fixed to the clamping neck 98 of the tool holder 42 state of the guard unit 14 in a manner already known to a person skilled in the art with a corresponding axial securing groove (not shown here in detail) of the clamping neck 98.
  • the clamping element formed as a further clamping element 34 has an at least substantially annular base region.
  • the base region of the clamping element formed as a further clamping element 34 has a maximum total circumferential extent, which extends in at least one operating state along an angular range which is smaller than 360 °.
  • the total circumferential extent of the base region of the further clamping element 34 extends along a circumferential direction 78, which extends in a state of the protective hood unit 14 mounted on the machine tool 12 in a plane extending at least substantially perpendicular to the axis of rotation of the output shaft 60.
  • the further clamping element 34 has a clamping element end 80 which, viewed at least in one operating state, along the circumferential direction 78, is arranged at a distance from a further clamping element end 82 of the further clamping element 34.
  • the clamping element end 80 and the further clamping element end 82 extend from the base region of the clamping element 34 at least substantially transversely to the circumferential direction 78.
  • the clamping element end 80 and the further clamping element end 82 are integrally formed integrally with the annular base region of the further clamping element 34.
  • clamping element end 80 and the further clamping element end 82 each have one of at least two receiving recesses 84, 86 of the further clamping element 34, in which the clamping element 18 can be arranged at least partially ( FIG. 3 ).
  • the clamping element 18 is in this case designed as a clamping screw which extends through the receiving recesses 84, 86 in a state arranged on the further clamping element 34.
  • the clamping element 18 in this case interacts with a correspondingly formed with the clamping element 18a counter-clamping element 88 of the clamping unit 16.
  • the counter-clamping element 88 is designed as a clamping nut which has a thread corresponding to a thread of the tensioning screw designed as a clamping element 18.
  • the counter-clamping element 88 is arranged on the further clamping element end 82 by means of a form-fitting, frictional and / or material-locking connection on a side of the further clamping element end 82 facing away from the clamping element end 80.
  • the clamping unit 16 thus comprises at least one screw unit for tightening the protective hood unit 14.
  • the clamping unit 16 has another unit that appears appropriate to a person skilled in the art for clamping the protective hood unit 14, such as a lever unit, a bayonet locking unit, etc.
  • the anti-rotation element 22 is positively and / or non-positively coupled to the clamping element 18.
  • the anti-rotation element 22 has an internal thread 94, which cooperates in at least one operating state with an external thread 96 of the clamping element 18 to a movement of the anti-rotation element 22 in response to movement of the clamping element 18.
  • the anti-rotation element 22 is movably mounted in at least one operating state relative to the further clamping element 34.
  • the anti-rotation element 22 is pivotally mounted in at least one operating state relative to the further clamping element 34.
  • the anti-rotation element 22 has at least one pivot axis 38 which extends at least substantially parallel to a longitudinal axis 40 of the clamping element 18.
  • the pivot axis 38 is identical to the longitudinal axis 40 of the clamping element 18 is formed.
  • the anti-rotation element 22 can be pivoted or rotated in at least one operating state together with the clamping element 18 about the pivot axis 38.
  • the guard anti-rotation device 10 further comprises at least one securing unit 26, which is provided in at least one operating state, the anti-rotation element 22 at least largely against movement along a decoupling direction 30 of the anti-rotation element 22 at a movement of the clamping element 18 in a release direction 28 of the clamping element Secure anti-rotation position of the anti-rotation element 22 out.
  • the securing unit 26 has at least one securing element 32, which is arranged on the further clamping element 34 of the clamping unit 16 cooperating with the clamping element 18.
  • the securing element 32 is integrally formed with the further clamping element 34.
  • the securing element 32 is formed by an extension of the clamping element end 80, which extends at least substantially perpendicular to a clamping surface 90 of the clamping element end 80.
  • the securing element 32 extends from the clamping element end 80 in the direction of the further clamping element end 82.
  • the clamping surface 90 acts in this case to a clamping of the protective hood unit 14 with a clamping surface 92 of the tensioning screw designed as a clamping element 18 together.
  • the securing unit 26 furthermore has at least one decoupling element 36 which is provided, in at least one operating state, for movement of the anti-rotation element 22 in a decoupling position of the anti-rotation element 22 at least along the decoupling direction 30 of the anti-rotation element 22 from movement of the clamping element 18 along the release direction 28 of the anti-rotation element 22 Decouple clamping element 18.
  • the decoupling element 36 is arranged on the further clamping element 34 of the clamping unit 16 cooperating with the clamping element 18.
  • the decoupling element 36 is formed integrally with the further clamping element 34.
  • the securing element 32 is formed by an extension of the further clamping element end 82, which extends at least substantially perpendicular to a side surface 104 of the further clamping element end 82.
  • the side surface 104 is arranged on one side of the further clamping element end 82, which faces the clamping element end 80 of the further clamping element 34 (FIG. 3).
  • the decoupling element 36 extends from the further clamping element end 82 in the direction of the clamping element end 80.
  • the anti-rotation element 22 has at least one stop surface 106, which cooperates in at least one operating state at least with the decoupling element 36 of the securing unit 26.
  • the abutment surface 106 rests against the abutment surface 106 in the decoupling position of the anti-rotation element 22.
  • a movement of the anti-rotation element 22 is at least largely prevented during a movement of the clamping element 18 in the release direction 28 about the longitudinal axis 40 of the clamping element 18 relative to the further clamping element 34 along the release direction 28.
  • the anti-rotation element 22 has at least the stop surface 106, which cooperates in at least one operating state at least with the securing element 32 of the securing unit 26 ( FIG.
  • the stop surface 106 cooperates in a secured anti-rotation position of the anti-rotation element 22.
  • the anti-rotation element 22 is, viewed along the longitudinal axis 40 of the clamping element 18, spatially between the clamping element end 80 and the clamping element end 82 of the further clamping element 34 is arranged.
  • the guard neck 76 is pushed over the clamping neck 98 of the tool holder 42. Subsequently, by tightening the tensioning element designed as a clamping screw 18 and by cooperating with the tensioning strap formed as further clamping element 34 a tightening of the protective hood neck 76 and thus the protective hood unit 14 on the clamping neck 98 of the tool holder 42 in a manner already known to a person skilled in the art reached.
  • the anti-rotation element 22 arranged spatially between the clamping element end 80 and the clamping element end 82 of the further clamping element 34 is pivoted about the pivot axis 38 starting from the decoupling position of the anti-rotation element 22 in the direction of the clamping neck 98 of the tool holder 42.
  • the anti-rotation element 22 is pivoted as a result of rotational entrainment due to a frictional engagement of the internal thread 94 of the anti-rotation element 22 and the external thread 96 of the clamping element 18 by a rotational movement of the clamping element 18 against the release direction 28 relative to the further clamping element 34 in the direction of the clamping neck 98 of the tool holder 42 ( FIG. 3 ).
  • An anti-rotation region 102 of the anti-rotation element 22 is in this case pivoted into a Verwarschommesaus principle 100 of the clamping neck 98 of the tool holder 42 ( FIG. 4 ).
  • the clamping collar 98 has along the circumferential direction 78 a plurality of spaced-apart anti-rotation recesses 100.
  • the clamping element end 80 and the further clamping element end 82 are moved toward one another along the longitudinal axis 40 of the clamping element 18 as a result of further tightening of the clamping element 18 designed as a clamping screw.
  • the securing element 32 is moved in the direction of the anti-rotation element 22 until, viewed along an at least substantially perpendicular to the axis of rotation of the output shaft 60 extending direction, an overlap of the anti-rotation element 22 and of the fuse element 32 is reached.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (9)

  1. Dispositif de fixation anti-rotation de capot de protection d'une machine-outil, en particulier d'une meuleuse d'angle, comprenant au moins une unité de serrage (16) prévue pour bloquer une unité capot de protection (14), laquelle unité de serrage comporte au moins un élément de serrage (18), au moins une unité de fixation anti-rotation (20), laquelle comprend au moins un élément de fixation anti-rotation (22), et au moins une unité d'accouplement en déplacement (24), laquelle est prévue pour déplacer l'élément de fixation anti-rotation (22), dans au moins un état de fonctionnement, en fonction d'un déplacement de l'élément de serrage (18), au moins une unité de fixation (26) étant prévue pour, dans au moins un état de fonctionnement, lors d'un déplacement de l'élément de serrage (18) dans une direction de relâchement (28) de l'élément de serrage (18), fixer l'élément de fixation anti-rotation (22) au moins dans une très large mesure de manière à empêcher un déplacement le long d'une direction de désaccouplement (30) de l'élément de fixation anti-rotation (22) à partir d'une position de fixation anti-rotation de l'élément de fixation anti-rotation (22), caractérisé en ce que l'élément de fixation anti-rotation (22) comprend au moins une surface de butée (106) qui, dans au moins un état de fonctionnement, coopère au moins avec l'élément de fixation (32) de l'unité de fixation (26).
  2. Dispositif de fixation anti-rotation de capot de protection selon la revendication 1, caractérisé en ce que l'unité de fixation (26) comprend au moins un élément de fixation (32) qui est disposé sur un autre élément de serrage (34), coopérant avec l'élément de serrage (18), de l'unité de serrage (16).
  3. Dispositif de fixation anti-rotation de capot de protection selon la revendication 2, caractérisé en ce que l'élément de fixation (32) est réalisé d'un seul tenant avec l'autre élément de serrage (34).
  4. Dispositif de fixation anti-rotation de capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de fixation (26) comprend au moins un élément de désaccouplement (36) qui est prévu pour, dans au moins un état de fonctionnement, désaccoupler un déplacement de l'élément de fixation anti-rotation (22) dans une position de désaccouplement de l'élément de fixation anti-rotation (22) au moins le long de la direction de désaccouplement (30) de l'élément de fixation anti-rotation (22) d'un déplacement de l'élément de serrage (18) le long de la direction de relâchement (28) de l'élément de serrage (18).
  5. Dispositif de fixation anti-rotation de capot de protection selon la revendication 4, caractérisé en ce que l'élément de désaccouplement (36) est disposé sur un autre élément de serrage (34), coopérant avec l'élément de serrage (18), de l'unité de serrage (16).
  6. Dispositif de fixation anti-rotation de capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de fixation anti-rotation (22) est accouplé par complémentarité de forme et/ou par force à l'élément de serrage (18).
  7. Dispositif de fixation anti-rotation de capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de fixation anti-rotation (22) est, dans au moins un état de fonctionnement, monté de manière mobile par rapport à un autre élément de serrage (34).
  8. Dispositif de fixation anti-rotation de capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de fixation anti-rotation (22) présente au moins un axe de pivotement (38) qui s'étend au moins sensiblement parallèlement à un axe longitudinal (40) de l'élément de serrage (18).
  9. Système de machine-outil comprenant au moins un dispositif de fixation anti-rotation de capot de protection selon l'une quelconque des revendications précédentes, au moins une machine-outil, en particulier une meuleuse d'angle, et au moins une unité capot de protection (14).
EP12791461.2A 2011-12-23 2012-11-20 Dispositif anti-rotation de capot de protection Not-in-force EP2794188B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011089758A DE102011089758A1 (de) 2011-12-23 2011-12-23 Schutzhaubenverdrehsicherungsvorrichtung
PCT/EP2012/073018 WO2013092056A1 (fr) 2011-12-23 2012-11-20 Dispositif anti-rotation de capot de protection

Publications (2)

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EP2794188A1 EP2794188A1 (fr) 2014-10-29
EP2794188B1 true EP2794188B1 (fr) 2019-01-16

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EP12791461.2A Not-in-force EP2794188B1 (fr) 2011-12-23 2012-11-20 Dispositif anti-rotation de capot de protection

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US (1) US9333622B2 (fr)
EP (1) EP2794188B1 (fr)
CN (1) CN104010769B (fr)
DE (1) DE102011089758A1 (fr)
WO (1) WO2013092056A1 (fr)

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US20140276820A1 (en) * 2013-03-15 2014-09-18 Biomet C.V. External fixation system
JP7015186B2 (ja) * 2018-02-21 2022-02-02 株式会社マキタ 電動工具

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DE3744219A1 (de) * 1987-12-24 1989-07-06 Fein C & E Handschleifmaschine mit verstellbarer schutzhaube
DE3921772A1 (de) * 1989-07-01 1991-01-03 Hilti Ag Handgeraet mit trenn- oder schleifscheibe
DE10000701A1 (de) * 2000-01-10 2001-07-12 Bosch Gmbh Robert Winkelschleiferschutzhaube
US6893334B1 (en) * 2002-01-24 2005-05-17 J. David Stivers Rotating guard for angle grinder
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Also Published As

Publication number Publication date
WO2013092056A1 (fr) 2013-06-27
DE102011089758A1 (de) 2013-06-27
US20140370793A1 (en) 2014-12-18
EP2794188A1 (fr) 2014-10-29
CN104010769A (zh) 2014-08-27
CN104010769B (zh) 2016-12-14
US9333622B2 (en) 2016-05-10

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