EP2106321B1 - Dispositif anti-rotation pour un capot de protection - Google Patents

Dispositif anti-rotation pour un capot de protection Download PDF

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Publication number
EP2106321B1
EP2106321B1 EP20070822417 EP07822417A EP2106321B1 EP 2106321 B1 EP2106321 B1 EP 2106321B1 EP 20070822417 EP20070822417 EP 20070822417 EP 07822417 A EP07822417 A EP 07822417A EP 2106321 B1 EP2106321 B1 EP 2106321B1
Authority
EP
European Patent Office
Prior art keywords
unit
protective hood
fitting
tool
power tool
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
EP20070822417
Other languages
German (de)
English (en)
Other versions
EP2106321A1 (fr
Inventor
Cornelius Boeck
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 EP2106321A1 publication Critical patent/EP2106321A1/fr
Application granted granted Critical
Publication of EP2106321B1 publication Critical patent/EP2106321B1/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5009—For portable articles
    • Y10T70/5022—Tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5611—For control and machine elements

Definitions

  • the invention is based on a guard anti-rotation device according to the preamble of claim 1.
  • the guard is rotatably mounted on a nozzle of a flange of the angle grinder and releasably secured with only a single positive locking means.
  • the flange will pass centrally from the spindle of the angle grinder.
  • the spindle carries a separating or grinding disk, which can be tensely tensioned, for cutting and machining workpieces, which is partially encompassed by the protective hood.
  • the protective hood on the handheld power tool is to be positioned so that it can be adjusted in a rotational manner such that the area of the grinding wheel facing the user is encompassed by the protective hood.
  • an area of the grinding wheel pointing away from the user towards the workpiece engagement projects radially beyond the flange.
  • the invention is according to the preamble of claim 1 from a guard anti-rotation device for a hand tool, in particular for an angle grinder, which is provided for a rotation between the power tool and a protective hood unit.
  • the guard anti-rotation device has a form-locking unit which is provided for a rotation between the hand tool and the guard unit in the event of a bursting tool.
  • the protective hood unit is preferably provided in front of a tool, in particular in front of a disc-shaped, rotatably drivable tool, and / or in front of the operator tossed machining residues and fixed to the handheld power tool in a working position.
  • a "form-locking unit” should be understood to mean, in particular, a unit which is provided for a circumferentially positive connection between the protective hood unit and the handheld power tool and which is designed to receive forces of an outwardly thrown tool part in the case of a bursting tool, wherein the Protective hood anti-rotation device in an anti-rotation position is designed here to hold a force of at least 1000 N, advantageously of at least 2500 N and particularly advantageously of at least 4500 N.
  • the guard unit attached to the power tool can be moved by a recording of pulses or forces of outwardly thrown tool parts of the ruptured tool in a Vermoserssposition.
  • the term "intended” should be understood to mean in particular specially equipped and / or specially designed. Due to the inventive design of the guard anti-rotation device, an effective protection of an operator of the power tool before the rotating tool during operation of the power tool and / or in particular in a case of damage of the tool, such as in the case of a bursting tool, before in the direction of the operator flying parts of the tool achieved become.
  • the positive locking unit has at least one form-locking element that is movably mounted on the protective hood unit and / or the hand-held power tool, whereby the positive-locking element can be moved or brought into an anti-rotation position in the case of a bursting tool and thus an anti-twist device by means of the positive locking unit the protective hood unit and the power tool can be achieved. Furthermore, a comfortable disassembly can also be achieved by the positive-locking element for this purpose is movable from the anti-rotation position.
  • the positive-locking element is mounted movably about a pivot axis on the protective hood unit, thereby advantageously providing an impulse transmission to the outside Thrown tool part of a bursting tool to achieve a VerFDêtspo, position of the positive-locking element or the protective hood unit can be used.
  • the interlocking element is deflected by a transmitted to the protective hood unit impulse of a tool part from a rest position and moved in a Vermosellessposition. This can be achieved in a particularly advantageous manner if the positive-locking element is arranged on a protective hood of the protective hood unit, in particular on a side of the protective hood facing the tool in the assembled state.
  • the form-locking unit has a guide element in which the positive-locking element is movably mounted, whereby a particularly targeted movement into an anti-rotation position is achieved and, moreover, a low-wear movement of the positive-locking element can be achieved.
  • the positive locking element is at least partially formed integrally with the protective hood unit and / or the power tool.
  • the term "in one piece” is to be understood to mean, in particular, in one piece, made of a cast and / or designed as a component.
  • the positive-locking element is at least partially formed by a latching element, advantageously a rotation of the protective hood unit, in particular in the case of a bursting tool, can be prevented, in particular if the latching element is intended to block a movement of the protective hood unit in at least one direction.
  • a locking direction of the locking element corresponds to a rotational direction of a tool.
  • the positive-locking element can be moved together with the protective hood unit into an anti-rotation position, whereby an energy of a burst tool part can be used for changing the position of the positive-locking element in the anti-rotation position.
  • a "Vermoserssposition" should be understood in particular a position of the guard unit with respect to the power tool, in which the guard unit against rotation, in particular in a rotational direction of the tool on the hand tool, in particular on a receiving flange, is arranged.
  • This can be achieved in a particularly advantageous manner if the form-fitting element is provided for this purpose, at least partially to couple positively to the protective hood unit.
  • a coupling can take place directly or indirectly via a driving element and / or further, the expert appears useful as components.
  • the positive locking unit has at least one entrainment element which is provided for entrainment of at least one positive locking element in a Verwarmentssposition together with the protective hood unit, whereby a targeted change in position of the positive locking element in the anti-rotation position can be achieved in the case of a bursting tool.
  • a entrainment of the positive locking element by the driving element in a Verwarmentssposition in the case of a bursting tool can be advantageously achieved when the driving element is intended to at least partially to the guard unit in a circumferential direction to couple, wherein the guard unit preferably due to a transmission of kinetic energy of an outward spun tool part of the bursting tool undergoes a movement in an anti-rotation position along a rotational direction of the tool.
  • This can be achieved in a structurally simple manner if the entrainment element is formed by an intermediate ring which is arranged between the protective hood unit and the handheld power tool and / or by a rolling element and / or further entrainment elements which appear appropriate to the person skilled in the art.
  • the form-fitting unit has at least one tear-off, which is intended to fix at least one carrier element and / or a positive locking element in a rest position against rotation, whereby obstructing or blocking an assembly process or a dismantling operation of the protective hood unit means the positive-locking element can be advantageously prevented during assembly or disassembly of the protective hood unit on the hand-held power tool.
  • a "tear-off" is to be understood in particular a backup of a positive locking element and / or a driving element, which is intended to the positive locking element or the positive locking element together with the driving element in a rest position in a regular operation of the power tool system and / or in a fixed off mode of operation of the power tool and at an action of a high force, in particular by a hitting on the guard unit tool part of an im Operation of the power tool burst tool to release a movement of the positive-locking element from its rest position in a Verwarsposition.
  • the positive locking unit has at least one holding element which is provided to secure the positive-locking element in a position against rotation. This can be achieved in a particularly simple manner if the retaining element is formed by a spring element.
  • a handheld power tool system which comprises a hand tool, in particular an angle grinding machine, a guard unit and a guard anti-rotation device according to claim 1, wherein the guard anti-rotation device comprises a form-locking unit, which to a rotation of the guard unit relative to the power tool in the case of a bursting tool is provided.
  • the guard anti-rotation device comprises a form-locking unit, which to a rotation of the guard unit relative to the power tool in the case of a bursting tool is provided.
  • the handheld power tool has a receiving unit which is provided at least partially to a movable mounting of the positive locking element, whereby a particularly compact arrangement of the positive locking unit can be achieved at least partially.
  • the hand tool machine has a receiving unit with an intermediate ring on which at least partially the positive-locking element is arranged, whereby the positive-locking element can be easily replaced structurally in a deformation after a positive connection between the protective hood unit and the power tool in the case of a bursting tool.
  • the form-locking unit has at least two interlocking elements which are arranged successively in a circumferential direction on a receiving unit of the handheld power tool and / or on the protective hood unit, a multiple positive and / or non-positive connection between the protective hood unit and the receiving unit can be achieved, and / or it can the guard unit in different positions along the circumferential direction on the receiving unit against rotation, in particular in a bursting tool mounted.
  • a "circumferential direction” should be understood to mean, in particular, a circumferential direction of the protective hood unit, which in a mounted state of the protective hood unit is oriented substantially parallel to a direction of rotation of the tool.
  • the invention comprises a hand tool for a rotating, preferably disc-shaped tool, with a machine housing having a flange or a machine neck on which a protective hood, in particular made of sheet metal, for covering the tool is releasably clamped, wherein the protective cover a Protective hood body has, which consists of a circular disk-shaped piece, in particular with angled outer edge and has a central circular recess, at the edge of a guard neck or collar is formed, which carries a ring-like tension band, which is contractible by means of a clamping means and one between machine neck and guard acting anti-rotation between guard and machine neck is arranged in the form of a profiling, the guard on the clamping band and / or on the clamping means in its clamping position multiple positive and / or non-positive with the machine nhals can be coupled and thus battinglegbar and to achieve a release position except positive engagement and / or adhesion to the machine neck can be brought, the guard is then rotation
  • FIG. 1 is a hand tool machine system 50a with an angle grinder formed and shown only partially handheld power tool 12a, a protective hood unit 14a and a guard anti-rotation device 10a shown.
  • the hand tool 12a has a hand tool housing 54a and for receiving the guard unit 14a and a tool 18a formed by a cutting disc on a receiving unit 48a, which is bolted to the power tool housing 54a.
  • a drive shaft 58a protrudes from the receiving unit 48a on a side 56a facing away from the hand-held power tool housing 54a, which at its free end 60a can be connected to the disk-shaped tool 18a and can be driven to rotate about an axis 62a.
  • the protective hood unit 14a comprises a protective hood 52a and a closure unit 64a.
  • the protective hood 52a covers an angular range of the tool 18a of approximately 180 ° and for this purpose has a half-disk-shaped protective hood body 66a and a protective hood edge 68a which is initially perpendicular to the half-disk-shaped protective hood body 66a and then parallel to the half-disk-shaped protective hood body 66a a radial direction 70a is aligned inwardly.
  • the protective hood 52a also has a protective collar collar 72a, which is aligned substantially perpendicular to the half-disk-shaped protective hood body 66a.
  • the protective hood collar 72a is outwardly surrounded in the radial direction 70a by a tension band 74a of the closure unit 64a, wherein the protective collar collar 72a and the tension band 74a are connected to one another by means of a welded connection.
  • the protective hood collar 72a is provided for fastening the protective hood unit 14a to the handheld power tool 12a or to the receiving unit 48a, which has a cylindrical receiving flange 76a for this purpose.
  • this region has two end regions 78a, 80a which extend outward in the radial direction 70a.
  • the two end regions 78a, 80a each have a recess 82a through which a closure element 84a of the closure unit 64a formed by a clamping screw engages (cf. FIG. 2 ).
  • the clamping screw can be fastened by means of a nut 86a in the recesses 82a of the clamping band 74a.
  • the protective hood 52a is fastened by means of the closure unit 64a to the receiving unit 48a or to the receiving flange 76a due to frictional engagement between the protective collar 72a and the clamping band 74a and the receiving flange 76a in a working position, so that the protective hood unit 14a in one regular operation of the power tool 12a is arranged rotationally fixed.
  • closure unit 64a it is always conceivable to use other closure elements, such as, for example, a tensioning lever and / or form-locking elements, etc., instead of the tensioning screw.
  • the handheld power tool system 50a has a coding device 88a which is provided to prevent assembly of tools 18a or of tools 18a together with the protective hood unit 14a on hand tool machines 12a which are unsuitable for this purpose.
  • the tension band 74a has a coding element 90a of the coding device 88a, which is formed integrally with the tension band 74a.
  • the coding element 90a is formed by an expression extending in the radial direction 70a inwardly and has a rectangular shape.
  • the receiving flange 76a has a coding element 92a of the coding device 88a, which is formed by a recess into which the coding element 90a of the tensioning strap 74a can be inserted when the protective hood unit 14a is mounted with the handheld power tool 12a.
  • the protective hood unit 14a can be rotated to a working position.
  • the receiving flange 76a has a circumferential groove 36a in the circumferential direction 36a, 38a, in which upon rotation of the protective hood unit 14a in the working position, the coding element 90a is guided.
  • FIG. 2 is the guard rotation 10a off FIG. 1 shown in more detail.
  • the guard anti-rotation device 10a is provided for preventing rotation between the guard unit 14a and the hand tool 12a and the receiving unit 48a during damage of the tool 18a, such as a bursting tool 18a.
  • the guard anti-rotation device 10a has a form-locking unit 16a, which is provided for a positive rotation between the hand tool 12a and the protective hood unit 14a in the case of a bursting tool 18a.
  • the form-fitting unit 16a has a positive-locking element 20a, which is arranged within the receiving flange 76a, and a plurality of positive-locking elements 24a, 26a, which are arranged in the circumferential direction 36a, 38a successively on the clamping band 74a and / or the protective collar collar 72a of the protective hood unit 14a.
  • the positive-locking elements 24a, 26a of the protective hood unit 14a are formed by recesses.
  • the form-fitting element 20a of the receiving flange 76a comprises a hook element 96a and a portion 98a, which is formed by a rolling body 100a.
  • the form-fitting element 20a is arranged so as to be rotatable about a rotational axis 104a on an outer edge region 102a of the receiving flange 76a in the radial direction 70a.
  • the partial region 98a of the positive-locking element 20a formed by the roller body 100a bears against a surface 106a of the clamping band 74a and / or the protective hood collar 72a which faces inward in the radial direction 70a.
  • the positive-locking element 20a is positively coupled to the tension band 74a and / or to the protective collar collar 72a.
  • the form-fitting unit 16a has a holding element 46a, which is formed by a spring element which holds the form-fitting element 20a in a position against rotation.
  • the positive-fit element 20a is arranged in a form-fitting manner in the receiving unit 48a due to a configuration in the radial direction 70a.
  • a bursting tool 18a during operation of the power tool 12a tool parts are thrown outward in a direction of rotation 108a of the tool 18a. If one of these tool parts hits the protective hood unit 14a, a kinetic energy of the tool part transmitted to the protective hood unit 14a exceeds a fastening energy of the frictional connection of the locking unit 64a between the protective hood unit 14a and the handheld power tool 12a. The protective hood unit 14a is then rotated out of its working position in the direction of rotation 108a of the tool 18a.
  • the form-fitting element 20a which frictionally coupled to the radially inward surface 70a inwardly facing surface 106a of the clamping band 74a and / or the guard collar 72a, rotated about the axis of rotation 104a in the direction of rotation 108a, wherein the form-fitting element 20a and the rolling element 100a formed portion 98a of the form-fitting element 20a due to a movement of the protective hood unit 14a on the clamping band 74a and / or the protective collar collar 72a rolls, so that the positive-locking element 20a is moved together with the protective hood unit 14a.
  • the surface 106a of the clamping band 74a and / or the protective collar collar 72a facing inward in the radial direction 70a or an outer surface 110a of the partial region 98a formed by the rolling body 100a to increase a frictional connection between the positive-locking element 20a and the clamping band 74a and / or the protective hood collar 72a has an increased coefficient of friction due to a special choice of material and / or a special surface treatment.
  • the hook element 96a is rotated outwards and engages through one of the recesses of the tension band 74a and / or the protective hood collar 72a.
  • the protective hood unit 14a is in a position for preventing rotation relative to the hand-held power tool 12a.
  • FIGS. 3 to 12b Alternative embodiments are shown. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, however, the reference numerals of the embodiments, the letters a to k are added. The following description is essentially limited to the differences from the embodiment in the FIGS. 1 and 2 , wherein with respect to the same components, features and functions on the description of the embodiment in the FIGS. 1 and 2 can be referenced.
  • FIG. 3 an alternative embodiment of a guard anti-rotation device 10b is shown.
  • the guard anti-rotation device 10b has a form-locking unit 16b, which is provided for a rotation between a guard unit and a receiving unit 48b of a hand tool in the case of a bursting tool.
  • the form-locking unit 16b has a positive-locking element 20b, which is arranged rotatably mounted within the receiving unit 48b.
  • the positive locking element 20b differs from the versions FIG. 2 in that a hook element 96b for effecting a form-locking connection between the handheld power tool and the protective hood unit is reinforced here, thereby causing earlier engagement in a form-fitting element 24b, 26b of the protective hood unit formed by an embodiment.
  • a further embodiment of the form-locking unit 16b or the guard anti-rotation device and an operation of the guard anti-rotation device 10b are analogous to the description FIG. 2 ,
  • FIG. 4 an alternative embodiment of a guard anti-rotation device 10c is shown.
  • the guard anti-rotation device 10c has a form-fitting unit 16c on, which is provided for an anti-rotation between a protective hood unit and a receiving unit 48c of a hand tool in the case of a bursting tool.
  • the positive locking unit 16c has a positive-locking element 20c movably mounted in the receiving unit 48c and a plurality of positive-locking elements 24c, 26c arranged successively in a circumferential direction 36c, 38c.
  • the form-fitting element 20c of the receiving unit 48c is formed integrally with a driving element 34c, the form-fitting element 20c being arranged in a direction of rotation 108c of a tool downstream of the driving element 34c.
  • the entrainment element 34c is fixed together with the positive-locking element 20c by means of a tear-off protection 44c, which is only partially illustrated, with the receiving unit 48c in a rest position against rotation.
  • the entrainment element 34c is positively coupled to a tension band 74c and / or to a protective hood collar of the protective hood unit in the event of a rotation of the guard unit in an assembled state.
  • the receiving unit 48c has a guide element 32c, which is tapered in the direction of rotation 108c, of the form-locking unit 16c, in which the form-locking element 20c is movably mounted.
  • the guide element 32c is formed by a guide groove and arranged in an outer edge region 102c of a receiving flange 76c in the radial direction 70c. In the case of a bursting tool, the guard unit is rotated out of its working position in the direction of rotation 108c.
  • an impulse of the protective hood unit in the direction of rotation 108c is greater than a force of the tear-off preventer 44c, so that the positive-locking element 20c is also moved together with the entrainment element 34c and the protective hood unit in the direction of rotation 108c. Due to the tapered design of the guide element 32c, the interlocking element 20c is also moved outward in a radial direction 70c, thereby engaging one of the interlocking elements 24c, 26c of the protective hood unit.
  • FIG. 5 an alternative embodiment of a guard anti-rotation device 10d is shown.
  • the guard anti-rotation device 10d has a form-locking unit 16d, which is provided for a rotation between a guard unit and a receiving unit 48d a hand tool in the case of a bursting tool.
  • the form-locking unit 16d has a plurality of positive-locking elements 24d, 26d arranged one after the other in a circumferential direction 36d, 38d, each formed by a recess extending outwardly in a radial direction 70d and arranged on a tightening strap 74d and / or on a protective hood collar of the protective hood unit , Furthermore, the receiving unit 48d has a further form-fitting element 20d of the form-locking unit 16d, which is movably mounted in a guide element 32d of the receiving unit 48d formed by a guide groove. The Guide groove is disposed in a radial direction 70d outer edge portion 102d of a receiving flange 76d.
  • the form-fitting element 20d is formed by a chain and fixedly arranged on a driving element 34d formed by a sliding carriage.
  • the entrainment element 34d is fixed in a rest position against rotation by means of a tear-off protection 44d, which is shown only partially, with the receiving unit 48d.
  • a chain link of the chain is fixed in an end region 114d of the guide groove remote from the driver element 34d, so that the chain, together with the driver element 34d, extends along the circumferential direction 36d, 38d over an entire length of the guide groove.
  • the entraining element 34d non-positively couples to the tensioning strap 74d and / or the protective collar and, together with the protective hood unit, rotates around the direction of rotation 108d due to a tool part of the burst tool meeting the guard unit analogously to the description FIG. 4 emotional.
  • an area 112d which is available within the guide groove of the chain is reduced along the direction of rotation 108d, so that individual chain links of the chain move toward one another and thereby unfold to one another.
  • individual chain links engage in the form-fitting elements 24d, 26d of the protective hood unit formed by recesses and bring about an anti-rotation lock of the protective hood unit.
  • FIG. 6 an alternative embodiment of a guard anti-rotation device 10e is shown.
  • the guard anti-rotation device 10e has a form-locking unit 16e, which is provided for an anti-rotation between a protective hood unit and a receiving unit 48e of a hand tool in the case of a bursting tool.
  • the form-fitting unit 16e has a plurality of positive-locking elements 24e, 26e arranged one after the other in a circumferential direction 36e, 38e, each formed by a latching recess and arranged on a strap 74e and / or on a protective hood collar of the protective hood unit.
  • the latching recesses have a latching bevel, which extend outward from a radially inwardly directed surface 106e of the clamping strip 74e and / or the protective hood collar against a direction of rotation 108e of a tool.
  • the receiving unit 48e has a plurality of, in the circumferential direction 36e, 38e successively arranged positive-locking elements 20e, 22e, which are each formed by a latching element 28e, 30e.
  • the latching elements 28e, 30e are formed in one piece with a folded sheet-metal element 116e and are arranged on a respective outer fold region 118e of the sheet metal element 116e in the radial direction 70e.
  • the sheet metal element 116e has a driving element 34e and the fold region 118e and extends along the circumferential direction 36e, 38e over an entire length of a guide element 32e of the receiving unit 48e. Furthermore, the latching elements 28e, 30e extend obliquely in the radial direction 70e, counter to the direction of rotation 108e, so that they can engage positively in the latching recesses and block movement of the protective hood unit with respect to the handheld power tool in the direction of rotation 108e in the event of a bursting tool.
  • a rotation by means of the form-locking elements 20e, 22e, 24e, 26e and the driving element 34e in the case of a bursting tool is analogous to the description to FIG. 5 ,
  • FIG. 7 an alternative embodiment of a guard anti-rotation device 10f is shown.
  • the guard anti-rotation device 10f has a form-locking unit 16f, which is provided for a rotation between a guard unit 14f and a receiving unit 48f of a hand tool in the case of a bursting tool.
  • the form-fitting unit 16f has a plurality of interlocking elements 20f, 22f successively arranged in a circumferential direction 36f, 38f, each formed by a recess and extending inward in a radial direction 70f from an outwardly facing surface 120f of a receiving flange 76f of the receiving unit 48f ,
  • the positive locking unit 16f has two further form-locking elements 24f, 26f, which are formed integrally with a driving element 34f formed by a vibrating element and are mounted therewith swingably together with the protective hood unit 14f about a pivot axis 122f.
  • the positive-fit elements 24f, 26f are arranged on a radially inwardly facing side 124f of the oscillating element, the oscillating element being arranged in a mounted state of the hand-held power tool system on a tool-facing surface 126f of a protective hood body 66f.
  • the interlocking elements 24f, 26f extend inwardly from the vibrating element in the radial direction 70f.
  • the oscillating element has an oscillating mass 130f on a side 128f facing away from the interlocking elements 24f, 26f and is secured in a central portion 132f by means of two holding elements 46f, 134f formed in each case by a spring element in a position against rotation.
  • the protective hood unit 14f When the protective hood unit 14f is hit by an outwardly thrown-out tool part in the case of a bursting tool, the protective hood unit 14f experiences a pulse in a direction of rotation 108f of the tool.
  • the oscillating element is deflected from its rest position and one of the two positive locking elements 24f, 26f engages in one of the recesses of the receiving unit 48f, so that the protective hood unit 14f is secured against further rotation.
  • the guard anti-rotation device 10g has a form-locking unit 16g, which is provided for a rotation between a guard unit and a receiving unit 48g a hand tool in the case of a bursting tool.
  • the form-fitting unit 16g has two form-locking elements 20g, 22g which are each formed by a latching element 28g, 30g and are movably arranged within the receiving unit 48g at edge regions 102g, 136g which are opposite in the peripheral direction 36g, 38g.
  • the locking elements 28g, 30g are formed by spring elements and biased in a rest position against rotation against a spring force within the receiving unit 48g.
  • the receiving unit 48g has an intermediate ring 40g formed by a holding element 46g, which is rotatably arranged on a radially outwardly directed surface 120g of a receiving flange 76g.
  • the intermediate ring 40g is secured via a non-illustrated Abr effectivelyêt against accidental rotation of the receiving flange 76g.
  • Further form-fitting elements 24g, 26g are arranged on a tension band 74g and / or on a protective collar and formed by recesses.
  • the intermediate ring 40g frictionally coupled to the clamping band 74g and / or the protective hood collar, so that it releases a Verwarsposition of the form-locking elements 20g, 22g in the case of a bursting tool.
  • the intermediate ring 40g recesses 138g, 140g, through which engage the locking elements 28g, 30g in the recesses of the clamping band 74g and / or the protective hood collar.
  • FIG. 9 an alternative embodiment of a guard anti-rotation device 10h is shown.
  • the guard anti-rotation device 10h has a form-locking unit 16h, which is provided for a rotation between a guard unit and a receiving unit 48h of a hand tool 12h in the case of a bursting tool.
  • the form-fitting unit 16h has a form-locking element 20h movably mounted within the receiving unit 48h and formed by a bolt.
  • the positive-locking element 20h is movable outward by means of a driving element 34h, which is formed by an intermediate ring 40h, into a rotational locking position of the receiving unit 48h, wherein a direction of movement 142h of the positive-locking element 20h points obliquely to the radial direction 70h in a direction of rotation 108h of the tool maximum inclination angle of the form-fitting element 20h with respect to the radial direction 70h is 45 °.
  • the intermediate ring 40h has a web-shaped, in the radial direction 70h inwardly bent element 144h, which upon rotation of the intermediate ring 40h in the direction of rotation 108h, the positive-locking element 20h in a Verwarêtsposition emotional.
  • the intermediate ring 40h is also held by means of a tear-off 44h with the receiving unit 48h in a rest position against rotation.
  • the tear-off protection 44h has a securing element 146h formed by a recess on the intermediate ring 40h into which a securing element 148h of the receiving unit 48h formed by a projection bears.
  • a entrainment of the intermediate ring 40h by means of a movement of the protective hood unit in a Verwarmentssposition is analogous to the description FIG. 8
  • an anti-rotation by means of the positive locking element 20h with the protective hood unit is analogous to the description to FIG. 2 ,
  • FIG. 10 an alternative embodiment of a guard anti-rotation device 10i is shown.
  • the guard anti-rotation device 10i has a form-locking unit 16i, which is provided for a rotation between a guard unit and a receiving unit 48i a hand tool in the case of a bursting tool.
  • the form-locking unit 16i has a positive-locking element 20i, which is formed integrally with an intermediate ring 40i of the receiving unit 48i.
  • the form-fitting element 20i is formed by a tab projecting from a radially inward direction 70i inwardly facing side 150i of the intermediate ring 40i, which extends away from the intermediate ring 40i counter to a direction of rotation 108i of a tool.
  • the tab has a hook element 154i, which is formed integrally with the tab, the hook element 154i extending obliquely outwards.
  • the form-fitting unit 16i has a driving element 34i formed by a rolling element 42i rotatable in the circumferential direction 36i, 38i and disposed adjacent to the inward-facing side 150i of the intermediate ring 40i within the receiving unit 48i, the rolling element 42i being along the circumferential direction 36i , 38i rests in a region 156i of the intermediate ring 40i, on which the positive-locking element 20i is arranged thereon.
  • the intermediate ring 40i positively coupled with a strap 74i and / or a protective hood collar of the guard unit.
  • the intermediate ring 40i has a plurality of coupling elements 160i on a surface 158i facing outward in the radial direction 70i, which are each formed by a notch.
  • the clamping band 74i and / or the protective hood collar has a coupling element 162i formed by a protrusion extending inwards in the radial direction 70i, the coupling elements 160i, 162i interlocking with one another in a mounted working position of the protective hood unit on the handheld power tool.
  • the protective hood unit is struck by an outwardly thrown-out tool part and the protective hood unit moves together with the intermediate ring 40i in the direction of rotation 108i,
  • the tab is pressed in the radial direction 70i outward by rolling the rolling element 42i on the intermediate ring 40i and engages through a recess 138i of the intermediate ring 40i into one of a plurality of positive-locking elements 24i, 26i of the protective hood unit formed by a respective recess.
  • the guard anti-rotation device 10j has a form-locking unit 16j, which is provided for an anti-rotation between a protective hood unit and a receiving unit 48j a hand tool in the case of a bursting tool.
  • the receiving unit 48j has a form-locking element 20j of the form-locking unit 16j, which is formed by a bolt and is arranged within a base element 164j of the receiving flange 76j.
  • the bolt is movably supported along a direction 166j of the base member 164j toward a free end of a drive shaft 58j in the base member 164j.
  • the receiving unit 48j an intermediate ring 40j, which is arranged in the circumferential direction 36j, 38j to a receiving flange 76j and by means of a tear-off 44h, the analogous to the description FIG. 9 is formed, is fixed to the receiving flange 76j in a rest position against rotation.
  • a tightening strap 74j and / or a protective hood collar of the protective hood unit are frictionally arranged, wherein the intermediate ring 40j and the tightening strap 74j and / or the protective hood collar form positive-locking elements 24j, 26j of the form-locking unit formed by a respective recess on a side 168j facing the base element 164j 16j.
  • the bolt In a mounted working position of the protective hood unit, the bolt is supported by a recessless portion 170j of the clamping band 74j and / or the protective hood collar together with the intermediate ring 40j in the base member 164j against a spring force of a driving element 34j formed by a spring element.
  • the protective hood unit is unscrewed from its working position together with the intermediate ring 40j, as is the case with a bursting tool, the recessless portion 170j is rotated away from the bolt and the bolt moves in the direction 166j due to the spring force and engages in one of the Positive locking elements 24j, 26j, so that a rotation between the protective hood unit and the power tool is stopped.
  • FIG. 12 an alternative embodiment of a guard anti-rotation device 10k of a handheld power tool system 50k is shown.
  • the guard anti-rotation device 10k has a form-locking unit 16k, which serves to prevent rotation between a Guard unit 14k and a receiving unit 48k a hand tool 12k is provided in the case of a bursting tool.
  • the form-locking unit 16k has a plurality of form-locking elements 20k, 22k, which are formed integrally with the receiving unit 48k, and a plurality of form-locking elements 24k, 26k, which are formed integrally with a clamping band 74k of the protective hood unit 14k.
  • the positive-locking elements 20k, 22k, 24k, 26k are formed by latching elements 28k, 30k 172k, 174k which, in the event of meshing, block the protective hood unit 14k against rotation relative to the handheld power tool 12k in a direction of rotation 108k of the tool.
  • the form-fitting elements 20k, 22k of the receiving unit 48k are arranged in the radial direction 70k in an element 124k of the receiving unit 48k in an element 124k of a receiving flange 76k facing outwards.
  • the form-fit elements 24k, 26k are arranged on the tension band 74k in a side 168k facing the base element 164k and extend from the tension band 74k in a direction 176k from a guard body 66k to the base element 164k, the direction 176k being parallel to an axis 62k of a drive shaft 58k is aligned.
  • the receiving unit 48k has an intermediate ring 40k, which is positively connected to the receiving flange 76k.
  • the receiving flange 76k has a plurality of bolt-shaped coupling elements 178k arranged distributed in the circumferential direction 36k, 38k and mounted in corresponding oblong holes 180k of the intermediate ring 40k.
  • the elongated holes 180k have in the direction of rotation 108k a pointing in the direction 176k slope having a maximum angle of inclination to the direction of rotation 108k of 45 °, so that upon rotation of the guard unit 14k together with the intermediate ring 40k in the direction of rotation 108k this together with the protective hood unit 14k is moved in the direction of 176k of the base member 164k and the interlocking elements 20k, 22k, 24k, 26k of the receiving unit 48k and the protective hood unit 14k engage in a rotation of the guard unit 14k into one another.

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)
  • Portable Power Tools In General (AREA)
  • Sawing (AREA)
  • Harvester Elements (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Claims (20)

  1. Dispositif de fixation antirotation pour un capot de protection d'une machine-outil à main (12a-k), en particulier pour une meuleuse d'angle, prévu pour la protection antirotation entre la machine-outil à main (12a-k) et une unité de capot de protection (14a-k), une unité d'engagement positif (16a-k) étant prévue pour la protection antirotation de l'unité de capot de protection (14a-k) par rapport à la machine-outil à main (12a-k) dans le cas d'un outil (18a-k) en train d'éclater, caractérisé en ce que l'unité d'engagement positif (16a-k) présente au moins un élément d'engagement positif (20a, 22a, 24a-e, 26a-e ; 20b ; 20c ; 20d ; 20e, 22e ; 24f, 26f ; 20g, 22g, 24g, 26g ; 20h ; 20i ; 20j ; 24h-j, 26i-j ; 20k, 22k, 24k, 26k), lequel peut être dévié depuis une position de repos par une impulsion d'une partie d'outil d'un outil (18a-k) en train d'éclater transmise à l'unité de capot de protection (14a-k) et peut être déplacé dans une position de fixation antirotation.
  2. Dispositif de fixation antirotation pour un capot de protection selon la revendication 1, caractérisé en ce que l'unité d'engagement positif (16a-j) présente au moins un élément d'engagement positif (20a ; 20b ; 20c ; 20d ; 20e, 22e ; 24f, 26f ; 20g, 22g ; 20h ; 20i ; 20j), lequel est monté de manière déplaçable sur l'unité de capot de protection (14f) et/ou sur la machine-outil à main (12a-e ; 12g-j).
  3. Dispositif de fixation antirotation pour un capot de protection selon la revendication 2, caractérisé en ce que l'élément d'engagement positif (24f, 26f) est monté de manière déplaçable autour d'un axe de pivotement (122f) sur l'unité de capot de protection (14f).
  4. Dispositif de fixation antirotation pour un capot de protection selon la revendication 2, caractérisé en ce que l'unité d'engagement positif (16c-e) présente un élément de guidage (32c-e) dans lequel est monté de manière déplaçable l'élément d'engagement positif (20c-e).
  5. Dispositif de fixation antirotation pour un capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité d'engagement positif (16a-k) présente au moins un élément d'engagement positif (24a-e, 26a-e ; 20a, 22a ; 24g, 26g ; 24h-j, 26i-j ; 20k, 22k, 24k, 26k) qui est réalisé au moins en partie d'une seule pièce avec l'unité de capot de protection (14a-e ; 14g-k) et/ou la machine-outil à main (12f ; 12k).
  6. Dispositif de fixation antirotation pour un capot de protection selon la revendication 2 ou 5, caractérisé en ce que l'élément d'engagement positif (20e, 22e, 24e, 26e ; 20g, 22g, 24g, 26g ; 20k, 22k, 24k, 26k) est formé au moins en partie par un élément d'encliquetage (28e, 30e ; 28g, 30g ; 28k, 30k, 172k, 174k).
  7. Dispositif de fixation antirotation pour un capot de protection selon la revendication 2 ou 5, caractérisé en ce que l'élément d'engagement positif (20a-e, 22e ; 24f, 26f ; 20g, 22g ; 20h-j ; 20k, 22k) peut être déplacé conjointement avec l'unité de capot de protection (14a-k) dans une position de fixation antirotation.
  8. Dispositif de fixation antirotation pour un capot de protection selon la revendication 7, caractérisé en ce que l'élément d'engagement positif (20a-d ; 20e, 22e ; 20g, 22g ; 20h ; 20j) est prévu pour s'accoupler au moins en partie par engagement par force avec l'unité de capot de protection (14a-e ; 14g-h ; 14j).
  9. Dispositif de fixation antirotation pour un capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité d'engagement positif (16c-f ; 16h-j) présente au moins un élément d'entraînement (34c-f ; 34h-j) qui est prévu en vue d'un entraînement d'au moins un élément d'engagement positif (20ad ; 20e, 22e ; 24f, 26f ; 20h-j) dans une position de fixation antirotation conjointement avec l'unité de capot de protection (14c-f ; 14h-j).
  10. Dispositif de fixation antirotation pour un capot de protection selon la revendication 9, caractérisé en ce que l'élément d'entraînement (34c-e ; 34h ; 34j) est prévu pour s'accoupler au moins en partie par engagement par force avec l'unité de capot de protection (14c-e ; 14h ; 14j) dans une direction périphérique (36c-e, 38c-e ; 36h, 38h ; 36j, 38j).
  11. Dispositif de fixation antirotation pour un capot de protection selon la revendication 9, caractérisé en ce que l'élément d'entraînement (34h) est formé par une bague intermédiaire (40h).
  12. Dispositif de fixation antirotation pour un capot de protection selon la revendication 9, caractérisé en ce que l'élément d'entraînement (34i) est formé par un corps de roulement (42i).
  13. Dispositif de fixation antirotation pour un capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité d'engagement positif (16c ; 16d ; 16h ; 16j) présente au moins une fixation contre l'arrachement (44c ; 44d ; 44h ; 44j), qui est prévue pour fixer au moins un élément d'entraînement (34c ; 34d ; 34h ; 34j) et/ou un élément d'engagement positif (20c ; 20d ; 20h ; 20j) dans une position de repos avant une fixation antirotation.
  14. Dispositif de fixation antirotation pour un capot de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité d'engagement positif (16a ; 16f ; 16g) présente au moins un élément de retenue (46a, 46f, 134f ; 46g) qui est prévu pour fixer au moins un élément d'engagement positif (20a ; 24f, 26f ; 20g, 22g) dans une position avant une fixation antirotation.
  15. Système de machine-outil à main comprenant une machine-outil à main (12a-k), en particulier une meuleuse d'angle, une unité de capot de protection (14a-k) et un dispositif de fixation antirotation pour un capot de protection (10a-k) selon l'une quelconque des revendications précédentes, le dispositif de fixation antirotation pour un capot de protection (10a-k) présentant une unité d'engagement positif (16a-k) qui est prévue pour la protection antirotation de l'unité de capot de protection (14a-k) par rapport à la machine-outil à main (12a-k) dans le cas d'un outil (18a-k) en train d'éclater, caractérisé en ce que l'unité d'engagement positif (16a-k) présente au moins un élément d'engagement positif (20a, 22a, 24a-e, 26a-e ; 20b ; 20c ; 20d ; 20e, 22e ; 24f, 26f ; 20g, 22g, 24g, 26g ; 20h ; 20i ; 20j ; 24h-j, 26i-j ; 20k, 22k, 24k, 26k), lequel peut être dévié depuis une position de repos par une impulsion d'une partie d'outil d'un outil (18a-k) en train d'éclater transmise à l'unité de capot de protection (14a-k) et peut être déplacé dans une position de fixation antirotation.
  16. Système de machine-outil à main selon la revendication 15, caractérisé en ce que l'unité d'engagement positif (16a-j) présente au moins un élément d'engagement positif (20a ; 20b ; 20c ; 20d ; 20e, 22e ; 24f, 26f ; 20g, 22g ; 20h ; 20i ; 20j), lequel est monté de manière déplaçable sur l'unité de capot de protection (14f) et/ou sur la machine-outil à main (12a-e ; 12g-j).
  17. Système de machine-outil à main selon l'une quelconque des revendications 15 à 16, caractérisé en ce que l'unité de capot de protection (14f) présente un capot de protection (52f), sur lequel l'élément d'engagement positif (24f, 26f) est disposé de manière déplaçable autour d'un axe de pivotement (122f).
  18. Système de machine-outil à main selon l'une quelconque des revendications 15 à 17, caractérisé en ce que la machine-outil à main (12a-e ; 12g-j) présente une unité de réception (48a-e ; 48g-j) qui est prévue pour un support sur palier mobile de l'élément d'engagement positif (20a ; 20b; 20c ; 20d ; 20e, 22e ; 20g, 22g ; 20h ; 20i ; 20j).
  19. Système de machine-outil à main selon l'une quelconque des revendications 15 à 18, caractérisé en ce que la machine-outil à main (12i ; 12j) présente une unité de réception (48i ; 48j) avec une bague intermédiaire (40i ; 40j) sur laquelle est disposé au moins en partie l'élément d'engagement positif (20i ; 24j, 26j).
  20. Système de machine-outil à main selon l'une quelconque des revendications 15 à 19, caractérisé en ce que l'unité d'engagement positif (16a-g ; 16i-k) présente au moins deux éléments d'engagement positif (24a-d, 26a-d ; 20e-g, 22e-g, 24e-g, 26e-g ; 24i-j, 26i-j ; 20k, 22k, 24k, 26k) qui sont disposés dans une direction périphérique (36a-g, 38a-g ; 36i-k, 38i-k) les uns derrière les autres sur une unité de réception (48e-g ; 48k) de la machine-outil à main (12e-g ; 12k) et/ou sur l'unité de capot de protection (14a-g ; 14i-k).
EP20070822417 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection Not-in-force EP2106321B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610053305 DE102006053305A1 (de) 2006-11-13 2006-11-13 Handwerkzeugmaschine mit Schutzhaube, insbesondere Winkelschleifer
PCT/EP2007/062120 WO2008058904A1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection

Publications (2)

Publication Number Publication Date
EP2106321A1 EP2106321A1 (fr) 2009-10-07
EP2106321B1 true EP2106321B1 (fr) 2013-07-10

Family

ID=39004838

Family Applications (5)

Application Number Title Priority Date Filing Date
EP07822409.4A Active EP2106326B1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection
EP07822405.2A Active EP2104590B1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection
EP07822425.0A Active EP2106323B1 (fr) 2006-11-13 2007-11-09 Système de machine-outil portative
EP20070822423 Active EP2106322B1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection
EP20070822417 Not-in-force EP2106321B1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection

Family Applications Before (4)

Application Number Title Priority Date Filing Date
EP07822409.4A Active EP2106326B1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection
EP07822405.2A Active EP2104590B1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection
EP07822425.0A Active EP2106323B1 (fr) 2006-11-13 2007-11-09 Système de machine-outil portative
EP20070822423 Active EP2106322B1 (fr) 2006-11-13 2007-11-09 Dispositif anti-rotation pour un capot de protection

Country Status (6)

Country Link
US (7) US8562395B2 (fr)
EP (5) EP2106326B1 (fr)
CN (5) CN101534996B (fr)
DE (1) DE102006053305A1 (fr)
RU (5) RU2466848C2 (fr)
WO (5) WO2008058900A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US8460070B2 (en) 2013-06-11
US20090019899A1 (en) 2009-01-22
CN101534998B (zh) 2013-12-18
DE102006053305A1 (de) 2008-05-15
RU2009122212A (ru) 2010-12-20
US20120034855A1 (en) 2012-02-09
CN101534995A (zh) 2009-09-16
EP2106326A1 (fr) 2009-10-07
US20090036044A1 (en) 2009-02-05
CN101535002B (zh) 2014-10-08
EP2106321A1 (fr) 2009-10-07
EP2104590B1 (fr) 2016-01-27
CN101534996B (zh) 2013-05-08
US20090098812A1 (en) 2009-04-16
RU2465118C2 (ru) 2012-10-27
RU2464150C2 (ru) 2012-10-20
EP2106323B1 (fr) 2017-07-26
EP2106326B1 (fr) 2017-01-11
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US20090130961A1 (en) 2009-05-21
RU2463151C2 (ru) 2012-10-10
US7955162B2 (en) 2011-06-07
RU2466848C2 (ru) 2012-11-20
CN101534997A (zh) 2009-09-16
CN101534996A (zh) 2009-09-16
EP2106322A1 (fr) 2009-10-07
US20120231710A1 (en) 2012-09-13
US8454411B2 (en) 2013-06-04
CN101534998A (zh) 2009-09-16
US20090100885A1 (en) 2009-04-23
EP2106323A1 (fr) 2009-10-07
EP2106322B1 (fr) 2014-08-06
CN101534997B (zh) 2013-06-19
WO2008058909A1 (fr) 2008-05-22
WO2008058904A1 (fr) 2008-05-22
RU2009122230A (ru) 2011-02-20
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US8465348B2 (en) 2013-06-18
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EP2104590A1 (fr) 2009-09-30
RU2009122216A (ru) 2010-12-20
US8562395B2 (en) 2013-10-22
RU2009122235A (ru) 2010-12-20
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US8221197B2 (en) 2012-07-17
US8231436B2 (en) 2012-07-31

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