EP2139648B1 - Handle with a damping element having a joint unit - Google Patents

Handle with a damping element having a joint unit Download PDF

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Publication number
EP2139648B1
EP2139648B1 EP08717597A EP08717597A EP2139648B1 EP 2139648 B1 EP2139648 B1 EP 2139648B1 EP 08717597 A EP08717597 A EP 08717597A EP 08717597 A EP08717597 A EP 08717597A EP 2139648 B1 EP2139648 B1 EP 2139648B1
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EP
European Patent Office
Prior art keywords
handle
joint
damping
ball
joint unit
Prior art date
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Active
Application number
EP08717597A
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German (de)
French (fr)
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EP2139648A1 (en
Inventor
Roswitha Eicher
Stefan Heess
Joerg Maute
Florian Esenwein
Bernhard Eicher
Marcus Schuller
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Priority claimed from DE202007017264U external-priority patent/DE202007017264U1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority claimed from PCT/EP2008/052850 external-priority patent/WO2008110546A1/en
Publication of EP2139648A1 publication Critical patent/EP2139648A1/en
Application granted granted Critical
Publication of EP2139648B1 publication Critical patent/EP2139648B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means

Definitions

  • the invention relates to a handle, in particular additional handle, for a hand tool according to the preamble of claim 1.
  • auxiliary handle for a hand tool with a handle element is described, which is connectable via an insulating device for vibration isolation with a housing of the power tool.
  • the insulating device has a bearing booklet over which the handle element is guided in at least one direction.
  • the JP 2004 249430 A teaches a vibration damped handle with a handle member and a fastener. On the fastening element, a ball element is arranged. The gripping element is connected to a receptacle which engages around the ball element, wherein a space filled with a damping means is arranged between the ball element and receptacle.
  • EP 1 514 648 A2 is a handle for a hand tool, with a handle core, via which the handle with the hand tool (101, 201) is connectable, and with a handle member which connects via a hinge unit with the handle core is described. Further, an elastic damping means is disposed between the handle core and the handle member.
  • the EP 1 714 748 A describes a hand tool with a housing and a main handle.
  • the housing has, at a end facing the main handle, a part-spherical end area which, in a direction away from the main handle, merges into a cylindrical portion.
  • the main handle has a concave portion at an end facing the housing, which surrounds the part-spherical end portion of the housing , To the cylindrical portion of an elastic damping element is arranged.
  • the handle includes a switch that is electrically connected to the power cord.
  • an annular elastic damping element is arranged between the base body and the handle.
  • the main body has on a side facing the handle a part-spherical hinge unit with a bore through which an electrical line of the power cord is guided on the handle a receptacle for the hinge unit is arranged, wherein the receptacle has a spherical inner surface and engages around the hinge unit.
  • the annular damping element is spaced from the receptacle and disposed about the receptacle
  • the EP 1 707 323 A1 describes a handle for a hand tool, with a handle core and with a cylindrical handle element. About the handle core of the handle is connected to the power tool.
  • the grip core has three partial regions, the partial region facing the grip element being cylindrical and the central partial region being spherical.
  • the handle core is arranged in a cavity of the grip element, wherein a spherical inner surface of the grip element partially surrounds the spherical portion of the grip core.
  • a spherical inner surface of an end plate engages around the spherical portion of a side opposite the handle member.
  • the spherical portion has two surfaces on which elastic discs are arranged.
  • annular damping element is disposed between the handle member and the cylindrical portion of the handle core
  • the invention relates to a handle for a hand tool with a handle element and a fastening element for fastening the handle to a hand tool and a damping element with a hinge unit and with a multi-axis hinge unit, wherein the hinge unit is a ball joint.
  • the handle is particularly suitable as an additional handle.
  • the ball joint has an elastic ball element (33), wherein the ball element (33) consists of an elastomer.
  • the joint unit has more degrees of freedom than the joint unit of a handle known from the prior art.
  • the joint unit is a three-axis joint unit.
  • the hinge unit has three degrees of freedom and allows movement of the handle member relative to the fastener in all directions and also has a vibration-damping effect.
  • the elastic joint unit has the advantage that, after a deflection of the grip element relative to the fastening element, the grip element experiences a restoring force due to the elasticity, so that it returns to its starting position.
  • the ball joint advantageously allows a relative movement of the handle member to the fastener equally in all directions.
  • the multi-axis articulation unit comprising at least a first and a second joint element, is particularly elastic in that at least the first joint element or the second joint element is elastic, in particular made of an elastomer. Likewise, both the first and the second joint element may be elastic, in particular made of an elastomer.
  • a connecting element between the grip element and the fastening element is designed as an elastic ball element, which is accommodated in the grip element and the fastening element.
  • the ball element forms the first joint element, which is mounted in the second joint element, the receptacle in the grip element and fastening element.
  • the elastic multi-axis joint unit is formed by supporting a rigid ball element in an elastic material, in particular an elastomer.
  • the rigid ball element forms the first joint element. It can be formed either on the fastening element or on the handle element. Alternatively, it may also be a separate ball element, which is connected to either the fastener or the handle member.
  • the elastic receptacle for the rigid ball element forms the second joint element. It can e.g. be molded onto the handle element and / or the fastening element made of a thermoplastic elastomer.
  • the damping element comprises a securing element, which e.g. prevents the separation of the handle member from the fastener in the event of failure of the damping element.
  • the fuse element is e.g. centered in the handle between the fastener and the handle member arranged.
  • the grip element can be separated from the fastener.
  • the grip element is thus secured against tearing by the securing element.
  • the securing element may be designed as a movably mounted, rigid rod, e.g. in the form of a screw, a bolt, etc.
  • the securing element may be formed by a flexible component, such as a flexible band, rope, braid made of metal or plastic.
  • a second damping element is provided in addition to the multi-axis joint unit.
  • the second damping element preferably comprises at least one spring element.
  • a spring element in particular a package of disc springs can be used.
  • Other spring elements such as leaf springs, coil springs, etc. can also be used.
  • Other forms of damping elements such as elastic material, such as elastomer, foam, or with a fluid, such as air, oil, filled damping pads are also used in combination with the multi-axis joint unit.
  • An elastic damping element of an elastic material or of a spring element has the advantage that it can be designed so that its bias is adjustable. This can be the
  • the second damping element may be formed of an elastic material and arranged between the handle and a housing of a hand tool.
  • the damping element is formed substantially in the form of a disc which is clamped between the handle member and an outer surface of the housing.
  • the damping element is arranged with hinge unit in the handle.
  • the joint unit is arranged in a housing of the power tool. If necessary, both embodiments can also be combined, so that a multiaxial joint unit can be found both in the housing of a handheld power tool and in the handle.
  • the fastening element can be designed in different ways. It can e.g. a threaded bolt, wherein the protruding from the handle end is threaded to screw the fastener into the housing of a power tool. Instead of a thread, e.g. a tensioning device may be provided for connecting the handle to the housing of a hand tool machine.
  • the fastening element may be designed in the form of a receiving sleeve with a nut.
  • the receiving sleeve serves to receive a screw which is connectable to the nut.
  • a screw may be attached to the housing of the power tool.
  • the screw is inserted into the receiving sleeve and bolted to the nut.
  • the screw may for example be attached to the housing via a tensioning device.
  • the fastening element may additionally be provided with a carrier element.
  • the fastener may e.g. be included in a support element.
  • the handle according to the invention preferably has the shape of a style, rod or the like.
  • the handle element of the handle has a substantially cylindrical shape. This may be a cylinder in a simple embodiment.
  • the cylindrical gripping element can also be adapted to the ergonomics of the human hand by having, for example, different diameters apart from a pure cylindrical shape along its longitudinal axis.
  • the gripping element can be rotationally symmetrical, so that the handle can be grasped in any orientation by the operator.
  • the gripping element can also be so specially adapted to the ergonomics of the human hand that a first area of the gripping element serves specifically as a support surface for the palm and a second area as a support surface for the fingers.
  • the handle element can be made in one piece or in several parts.
  • a handle having a one-piece handle member has a rod-shaped handle member, e.g. made of a thermoplastic material, with a fastening element at one end of the grip element.
  • a two-part handle element for example, has a handle core made of a hard material, e.g. a thermoplastic, and a handle made of a soft material, e.g. an elastic plastic.
  • the handle cover can completely or partially surround the handle core.
  • the hand tool is in particular an angle grinder, a drill or impact drill or a screwdriver or drill.
  • a first embodiment of a handle 100 according to the invention is shown.
  • the handle 100 is suitable as an additional handle for a hand tool (not shown). It comprises a grip element 20, a fastening element 10 with carrier element 15 and a damping element 30 arranged between grip element 20 and carrier element 15 or fastening element 10.
  • the grip element 20 is executed in a style and cylindrical. In the interior of the grip element 20, a cavity 21 is formed.
  • the cavity 21 may optionally be coated with a damping material, e.g. a foam, an elastomer or with a fluid (air, water, oil) filled pillows, honeycomb or the like. filled out.
  • the handle 100 is connectable via a fastening element 10, which is connected to the carrier element 15, with a housing of a hand tool machine.
  • the fastener 10 is in the illustrated embodiment, a threaded bolt, the free end is provided with a thread and protrudes from the handle 100 and the support member 15 so that it can be screwed into a housing of a power tool.
  • a damping element 30 with at least one hinge unit 32, 52 is provided.
  • the hinge units 32, 52 according to Fig. 1 and 2 are three-axis joint units, in the three-axis joint unit 32, 52 to an elastic ball joint.
  • the hinge units 32, 52 are formed elastically in that at least one component of the multi-axis hinge unit is formed from an elastomer.
  • Fig. 1 shows a first embodiment of an elastic ball joint.
  • An elastic ball element 33 forms a first joint element 38.
  • the ball element 33 forms a connecting element between the grip element 20 and the fastening element 10.
  • the ball element 33 is arranged in a complementary receptacle 34 in the grip element 20 and the fastening element 10.
  • the receptacle 34 forms a second hinge element 39.
  • the receptacle 34 is formed by the fastening element 10 and the grip element 20 each having a substantially hemispherical receptacle 35, 36.
  • the ball element 33 consists of an elastomer, for example a thermoplastic elastomer, which can be injected between the grip element 20 and the fastening element 10 by means of an injection molding process. In this case, the projecting into the support member 15 end of the fastener 10, here the head of the threaded bolt, overmolded.
  • On the handle member 20 may also be provided a screw 22 which is encapsulated by the e
  • the handle 100 is also equipped with a securing element 40 which, in the event of failure of the damping element 30, prevents the separation of the grip element 20 from the fastening element 10 or the carrier element 15.
  • the securing element 40 is arranged substantially centered in the handle 100 between the fastening element 10 and the grip element 20. In case of failure of the damping element 30 due to damage or fatigue of the damping material is prevented by the securing element 40 that the handle member 20 can be separated from the fastener 10.
  • the securing element 40 is formed by a flexible component, for. B. a flexible band, rope, braid or the like. made of metal or plastic.
  • Fig. 2 shows a second embodiment of a handle 200 according to the invention with a hinge unit 52 in the form of an elastic ball joint.
  • the first hinge element 38 of the ball joint is made of a rigid ball element 53 formed.
  • the rigid ball element 53 is formed on the fastening element 10 in the illustrated embodiment.
  • the receptacle 54 for the ball member 53 forms the second hinge member 39.
  • the receptacle 54 is formed in a complementary to the ball member 53 form of an elastic material, such as an elastomer.
  • the receptacle 54 therefore has essentially the shape of a hollow sphere.
  • a second damping element 35 is provided.
  • the second damping element 35 comprises in the illustrated embodiment, a package of disc springs.
  • Other spring elements such as leaf springs, coil springs, etc. can also be used.
  • Other forms of damping elements such as elastic material, for example elastomer, foam, or with a fluid, for example air, oil, filled damping cushions can also be used in combination with the multi-axis joint unit 52.
  • the damping element 35 is arranged in the grip element 20 below the joint unit 52.
  • a disk 41 with thread (not shown) is arranged adjacent to the damping element 35.
  • the disk 41 is slidably mounted in its axial position along the longitudinal axis of the handle member 20. Thereby, the disc 41 can be moved upward to increase the bias on the damping element 35. Alternatively, the disc 41 may be moved down within the handle member 20 to reduce the bias on the damping member 35.
  • the bias of the damping element 35 is advantageously adjustable so that the user of the power tool 200 can adapt the handle 200 according to the invention to the particular application by increasing or decreasing the bias to achieve a lower or stronger vibration damping.
  • Another damping element 37 is provided in the form of a bending bar spring. This extends axially in the cavity 21 of the handle member 20.
  • the flexure spring is connected to the fastener 10 via the ball member 53.
  • the bending bar spring is supported on a plug 23 from.
  • FIG Fig. 3 A third embodiment of a handle 300 according to the invention with a hinge unit 62 in the form of an elastic ball joint is shown in FIG Fig. 3 shown.
  • an elastic ball element 33 forms a first joint element 38.
  • the ball member 33 according to Fig. 3 arranged in a housing 60 of a power tool, wherein the housing 60 in Fig. 3 only partially indicated.
  • the ball element 33 is accommodated in a complementary receptacle 64 in the housing 60 for this purpose.
  • the receptacle 64 forms a second joint element 39.
  • the ball element 33 consists of an elastomer, for example a thermoplastic elastomer, which can be injected into the receptacle 64 by means of an injection molding process.
  • the fastener 10 in the form of a threaded bolt is provided with a thread (not shown).
  • the elastic ball member 33 has a receptacle 63 with a thread corresponding to the fastening element 10 corresponding internal thread (not shown), so that the fastener 10 in the receptacle 63, and thus in the housing 60 of the power tool, can be screwed.
  • a second damping element 55 is provided, which is formed from an elastic material, in particular from an elastomer.
  • the second damping element 55 is arranged between the grip element 20 and the housing 60 of the power tool. In particular, it is clamped between the grip element 20 and the housing 60.
  • the damping element 55 is located on the one hand on the flange 15 of the handle member 20, on the other hand on the outer surface 61 of the housing 60 at. It has a passage 56 for the fastening element 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The invention relates to a handle, particularly an additional handle, for a hand tool machine with a grip element (20) and a fastening element (10) for fastening the handle to a hand tool machine, and a damping element (30) having a joint unit (32, 52), wherein the joint unit (32, 52, 62) comprises multiple axes.

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Handgriff, insbesondere Zusatzhandgriff, für eine Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a handle, in particular additional handle, for a hand tool according to the preamble of claim 1.

Zahlreiche Elektrowerkzeuge, wie z. B. Winkelschleifer und Bohrhämmer, sind mit einem Zusatzhandgriff ausgestattet. Um zu vermeiden, dass Schwingungen, die im Betrieb des Elektrowerkzeugs entstehen, über den Zusatzhandgriff auf den Bediener übertragen werden, sind Zusatzhandgriffe meist mit schwingungsdämpfenden Mitteln versehen.Numerous power tools, such. As angle grinders and rotary hammers are equipped with an additional handle. In order to avoid that vibrations that occur during operation of the power tool are transmitted to the operator via the auxiliary handle, additional handles are usually provided with vibration damping means.

In DE 101 30 548 A1 ist ein Zusatzhandgriff für eine Handwerkzeugmaschine mit einem Griffelement beschrieben, welches über eine Isoliervorrichtung zur Schwingungsisolierung mit einem Gehäuse der Handwerkzeugmaschine verbindbar ist. Die Isoliervorrichtung weist eine Lagereinheft auf, über die das Griffelement in wenigstens einer Richtung geführt ist.In DE 101 30 548 A1 an auxiliary handle for a hand tool with a handle element is described, which is connectable via an insulating device for vibration isolation with a housing of the power tool. The insulating device has a bearing booklet over which the handle element is guided in at least one direction.

Die JP 2004 249430 A lehrt einen schwingungsgedämpften Handgriff mit einem Griffelement und einem Befestigungselement. An dem Befestigungselement ist ein Kugelelement angeordnet. Das Griffelement ist mit einer Aufnahme verbunden, die das Kugelelement umgreift, wobei zwischen Kugelelement und Aufnahme ein mit einem Dämpfungsmittel gefüllter Zwischenraum angeordnet ist.The JP 2004 249430 A teaches a vibration damped handle with a handle member and a fastener. On the fastening element, a ball element is arranged. The gripping element is connected to a receptacle which engages around the ball element, wherein a space filled with a damping means is arranged between the ball element and receptacle.

In der EP 1 514 648 A2 ist ein Handgriff für eine Handwerkzeugmaschine, mit einem Griffkern, über den der Handgriff mit der Handwerkzeugmaschine (101, 201) verbindbar ist, und mit einem Griffelement, das über eine Gelenkeinheit mit dem Griffkern verbunden ist, beschrieben. Ferner ist zwischen dem Griffkern und dem Griffelement ein elastisches Dämpfungsmittel angeordnet.In the EP 1 514 648 A2 is a handle for a hand tool, with a handle core, via which the handle with the hand tool (101, 201) is connectable, and with a handle member which connects via a hinge unit with the handle core is described. Further, an elastic damping means is disposed between the handle core and the handle member.

Die EP 1 714 748 A beschreibt eine Handwerkzeugmaschine mit einem Gehäuse und einem Haupthandgriff. Das Gehäuse weist an einem dem Haupthandgriff zugewandten Ende einen teilkugelförmigen Endbereich auf, der, in einer von dem Haupthandgriff abweisenden Richtung, in einen zylindrischen Teilbereich übergeht Der Haupthandgriff weist an einem dem Gehäuse zugewandten Ende einen konkaven Teilbereich auf, der den teilkugelförmigen Endbereich des Gehäuses umgreift. Um den zylindrischen Teilbereich ist ein elastisches Dämpfungselement angeordnet.The EP 1 714 748 A describes a hand tool with a housing and a main handle. The housing has, at a end facing the main handle, a part-spherical end area which, in a direction away from the main handle, merges into a cylindrical portion. The main handle has a concave portion at an end facing the housing, which surrounds the part-spherical end portion of the housing , To the cylindrical portion of an elastic damping element is arranged.

In der US 2006/0113098 A1 ist eine Handwerkzeugmaschine mit einem Grundkörper, einem Handgriff und einem Netzkabel beschrieben. Der Handgriff umfasst einen Schalter, der mit dem Netzkabel elektrisch verbunden ist. Ferner ist zwischen dem Grundkörper und dem Handgriff ein ringförmiges elastisches Dämpfungselement angeordnet. Der Grundkörper weist an einer dem Handgriff zugewandten Seite eine teilkugelförmige Gelenkeinheit mit einer Bohrung auf, durch die eine elektrische Leitung des Netzkabels geführt ist An dem Handgriff ist eine Aufnahme für die Gelenkeinheit angeordnet, wobei die Aufnahme eine kugelförmige Innenfläche aufweist und die Gelenkeinheit umgreift. Das ringförmige Dämpfungselement ist zu der Aufnahme beabstandet und um die Aufnahme angeordnetIn the US 2006/0113098 A1 is a hand tool with a body, a handle and a power cord described. The handle includes a switch that is electrically connected to the power cord. Further, an annular elastic damping element is arranged between the base body and the handle. The main body has on a side facing the handle a part-spherical hinge unit with a bore through which an electrical line of the power cord is guided on the handle a receptacle for the hinge unit is arranged, wherein the receptacle has a spherical inner surface and engages around the hinge unit. The annular damping element is spaced from the receptacle and disposed about the receptacle

Die EP 1 707 323 A1 beschreibt einen Handgriff für eine Handwerkzeugmaschine, mit einem Griffkern und mit einem zylindrischen Griffelement. Über den Griffkern ist der Handgriff mit der Handwerkzeugmaschine verbunden. Der Griffkern weist drei Teilbereiche auf, wobei der dem Griffelement zugewandte Teilbereich zylindrisch ausgebildet ist und der mittlere Teilbereich kugelförmig ausgebildet ist. Der Griffkern ist in einem Hohlraum des Griffelements angeordnet, wobei eine kugelförmige Innenfläche des Griffelements den kugelförmigen Teilbereich des Griffkerns teilweise umgreift. Eine kugelförmige Innenfläche einer Endplatte umgreift den kugelförmigen Teilbereich von einer dem Griffelement entgegengesetzten Seite. Dadurch kann sich das Griffelement relativ zu dem Griffkern um den kugelförmigen Teilbereich drehen. Der kugelförmige Teilbereich weist zwei Flächen auf, auf denen elastische Scheiben angeordnet sind.The EP 1 707 323 A1 describes a handle for a hand tool, with a handle core and with a cylindrical handle element. About the handle core of the handle is connected to the power tool. The grip core has three partial regions, the partial region facing the grip element being cylindrical and the central partial region being spherical. The handle core is arranged in a cavity of the grip element, wherein a spherical inner surface of the grip element partially surrounds the spherical portion of the grip core. A spherical inner surface of an end plate engages around the spherical portion of a side opposite the handle member. As a result, the grip element can rotate relative to the grip core around the spherical portion. The spherical portion has two surfaces on which elastic discs are arranged.

Ferner ist zwischen dem Griffelement und dem zylindrischen Teilbereich des Griffkerns ein ringförmiges Dämpfungselement angeordnetFurther, an annular damping element is disposed between the handle member and the cylindrical portion of the handle core

Offenbarung der ErfindungDisclosure of the invention

Die Erfindung geht aus von einem Handgriff für eine Handwerkzeugmaschine mit einem Griffelement und einem Befestigungselement zur Befestigung des Handgriffs an einer Handwerkzeugmaschine sowie einem Dämpfungselement mit einer Gelenkeinheit und mit einer mehrachsigen Gelenkeinheit, wobei die Gelenkeinheit ein Kugelgelenk ist. Der Handgriff eignet sich insbesondere als Zusatzhandgriff.The invention relates to a handle for a hand tool with a handle element and a fastening element for fastening the handle to a hand tool and a damping element with a hinge unit and with a multi-axis hinge unit, wherein the hinge unit is a ball joint. The handle is particularly suitable as an additional handle.

Es wird vorgeschlagen, dass das Kugelgelenk ein elastisches Kugelelement (33) aufweist, wobei das Kugelelement (33) aus einem Elastomer besteht Dies hat den Vorteil, dass die Gelenkeinheit mehr Freiheitsgrade hat als die aus dem Stand der Technik bekannte Gelenkeinheit eines Handgriffs. Besonders bevorzugt ist die Gelenkeinheit eine dreiachsige Gelenkeinheit. Damit hat die Gelenkeinheit drei Freiheitsgrade und lässt eine Bewegung des Griffelements relativ zu dem Befestigungselement In allen Richtungen zu und hat zudem auch eine schwingungsdämpfende Wirkung. Darüber hinaus hat die elastische Gelenkeinheit den Vorteil, dass nach einer Auslenkung des Griffelements relativ zu dem Befestigungselement das Griffelement aufgrund der Elastizität eine Rückstellkraft erfährt, so dass es in seine Ausgangsposition zurückkehrt. Das Kugelgelenk erlaubt vorteilhafterweise eine Relativbewegung des Griffelements zu dem Befestigungselement gleichermaßen in allen Richtungen zu.It is proposed that the ball joint has an elastic ball element (33), wherein the ball element (33) consists of an elastomer. This has the advantage that the joint unit has more degrees of freedom than the joint unit of a handle known from the prior art. Particularly preferably, the joint unit is a three-axis joint unit. Thus, the hinge unit has three degrees of freedom and allows movement of the handle member relative to the fastener in all directions and also has a vibration-damping effect. In addition, the elastic joint unit has the advantage that, after a deflection of the grip element relative to the fastening element, the grip element experiences a restoring force due to the elasticity, so that it returns to its starting position. The ball joint advantageously allows a relative movement of the handle member to the fastener equally in all directions.

Die mehrachsige Gelenkeinheit, bestehend aus zumindest einem ersten und einem zweiten Gelenkelement, ist insbesondere dadurch elastisch ausgebildet, dass zumindest das erste Gelenkelement oder das zweite Gelenkelement elastisch, insbesondere aus einem Elastomer, ausgeführt ist. Ebenso können sowohl das erste als auch das zweite Gelenkelement elastisch, insbesondere aus einem Elastomer, ausgeführt sein.The multi-axis articulation unit, comprising at least a first and a second joint element, is particularly elastic in that at least the first joint element or the second joint element is elastic, in particular made of an elastomer. Likewise, both the first and the second joint element may be elastic, in particular made of an elastomer.

In einer ersten Ausführungsform einer mehrachsigen elastischen Gelenkeinheit ist ein Verbindungselement zwischen dem Griffelement und dem Befestigungselement als elastisches Kugelelement ausgebildet, welches in dem Griffelement und dem Befestigungselement aufgenommen ist. Das Kugelelement bildet hierbei das erste Gelenkelement, welches in dem zweiten Gelenkelement, der Aufnahme in dem Griffelement und Befestigungselement, gelagert ist.In a first embodiment of a multi-axis elastic joint unit, a connecting element between the grip element and the fastening element is designed as an elastic ball element, which is accommodated in the grip element and the fastening element. In this case, the ball element forms the first joint element, which is mounted in the second joint element, the receptacle in the grip element and fastening element.

In einer zweiten Ausführungsform ist die elastische mehrachsige Gelenkeinheit dadurch gebildet, dass ein starres Kugelelement in einem elastischen Material, insbesondere einem Elastomer, gelagert ist. Das starre Kugelelement bildet das erste Gelenkelement. Es kann entweder an das Befestigungselement oder an das Griffelement angeformt sein. Alternativ kann es auch ein separates Kugelelement sein, welches entweder mit dem Befestigungselement oder dem Griffelement verbunden ist. Die elastische Aufnahme für das starre Kugelelement bildet das zweite Gelenkelement. Sie kann z.B. an das Griffelement und/oder das Befestigungselement aus einem thermoplastischen Elastomer angespritzt sein.In a second embodiment, the elastic multi-axis joint unit is formed by supporting a rigid ball element in an elastic material, in particular an elastomer. The rigid ball element forms the first joint element. It can be formed either on the fastening element or on the handle element. Alternatively, it may also be a separate ball element, which is connected to either the fastener or the handle member. The elastic receptacle for the rigid ball element forms the second joint element. It can e.g. be molded onto the handle element and / or the fastening element made of a thermoplastic elastomer.

In einer weiterführenden Ausgestaltung der Erfindung umfasst das Dämpfungselement ein Sicherungselement, welches z.B. im Falle des Versagens des Dämpfungselements das Trennen des Griffelements von dem Befestigungselement verhindert. Dazu ist das Sicherungselement z.B. zentriert im Handgriff zwischen dem Befestigungselement und dem Griffelement angeordnet. Bei Versagen des Dämpfungselements aufgrund von Beschädigung oder Ermüdung des Dämpfungsmaterials wird durch das Sicherungselement verhindert, dass das Griffelement von dem Befestigungselement getrennt werden kann. Das Griffelement ist somit durch das Sicherungselement gegen Abreißen gesichert. Das Sicherungselement kann als bewegbar gelagerter, starrer Stab ausgeführt sein, z.B. in Form einer Schraube, eines Bolzens etc. Alternativ kann das Sicherungselement von einem biegeweichen Bauteil gebildet sein, beispielsweise einen flexiblen Band, Seil, Geflecht aus Metall oder Kunststoff.In a further embodiment of the invention, the damping element comprises a securing element, which e.g. prevents the separation of the handle member from the fastener in the event of failure of the damping element. For this, the fuse element is e.g. centered in the handle between the fastener and the handle member arranged. In case of failure of the damping element due to damage or fatigue of the damping material is prevented by the securing element that the grip element can be separated from the fastener. The grip element is thus secured against tearing by the securing element. The securing element may be designed as a movably mounted, rigid rod, e.g. in the form of a screw, a bolt, etc. Alternatively, the securing element may be formed by a flexible component, such as a flexible band, rope, braid made of metal or plastic.

Vorteilhafterweise ist zusätzlich zu der mehrachsigen Gelenkeinheit ein zweites Dämpfungselement vorgesehen. Das zweite Dämpfungselement umfasst vorzugsweise zumindest ein Federelement. Als Federelement kann insbesondere ein Paket aus Tellerfedern eingesetzt werden. Andere Federelemente, wie Blattfedern, Spiralfedern etc. können ebenfalls zum Einsatz kommen. Andere Formen von Dämpfungselementen, wie elastisches Material, z.B. Elastomer, Schaum, oder mit einem Fluid, z.B. Luft, Öl, gefüllte Dämpfungskissen sind ebenfalls in Kombination mit der mehrachsigen Gelenkeinheit einsetzbar. Ein elastisches Dämpfungselement aus einem elastischen Material oder aus einem Federelement hat den Vorteil, dass es so ausgestaltet sein kann, dass seine Vorspannung einstellbar ist. Damit kann derAdvantageously, a second damping element is provided in addition to the multi-axis joint unit. The second damping element preferably comprises at least one spring element. As a spring element, in particular a package of disc springs can be used. Other spring elements, such as leaf springs, coil springs, etc. can also be used. Other forms of damping elements, such as elastic material, such as elastomer, foam, or with a fluid, such as air, oil, filled damping pads are also used in combination with the multi-axis joint unit. An elastic damping element of an elastic material or of a spring element has the advantage that it can be designed so that its bias is adjustable. This can be the

Benutzer der Handwerkzeugmaschine den erfindungsgemäßen Handgriff auf den jeweiligen Anwendungsfall anpassen, indem er die Vorspannung erhöht oder erniedrigt, um eine geringere bzw. stärkere Schwingungsdämpfung zu erzielen.Users of the power tool adapt the handle according to the invention to the particular application by increasing or decreasing the bias voltage to achieve a lower or stronger vibration damping.

Alternativ kann das zweite Dämpfungselement aus einem elastischen Material gebildet sein und zwischen dem Handgriff und einem Gehäuse einer Handwerkzeugmaschine angeordnet sein. Dabei ist das Dämpfungselement im Wesentlichen in Form einer Scheibe ausgebildet, welche zwischen das Griffelement und eine Außenfläche des Gehäuses geklemmt wird.Alternatively, the second damping element may be formed of an elastic material and arranged between the handle and a housing of a hand tool. In this case, the damping element is formed substantially in the form of a disc which is clamped between the handle member and an outer surface of the housing.

In einer Ausführungsform des erfindungsgemäßen Handgriffs ist das Dämpfungselement mit Gelenkeinheit in dem Handgriff angeordnet. In einer alternativen Ausführungsform ist die Gelenkeinheit in einem Gehäuse der Handwerkzeugmaschine angeordnet. Beide Ausführungsformen können ggf. auch kombiniert werden, so dass sowohl in dem Gehäuse einer Handwerkzeugmaschine als auch in dem Handgriff eine mehrachsige Gelenkeinheit zu finden ist.In one embodiment of the handle according to the invention, the damping element is arranged with hinge unit in the handle. In an alternative embodiment, the joint unit is arranged in a housing of the power tool. If necessary, both embodiments can also be combined, so that a multiaxial joint unit can be found both in the housing of a handheld power tool and in the handle.

Das Befestigungselement kann in unterschiedlicher Weise ausgeführt sein. Es kann z.B. ein Gewindebolzen sein, wobei das aus dem Handgriff herausragende Ende mit einem Gewinde versehen ist, um das Befestigungselement in das Gehäuse einer Handwerkzeugmaschine zu schrauben. Anstelle eines Gewindes kann auch z.B. eine Spannvorrichtung zum Verbinden des Handgriffs mit dem Gehäuse einer Handwerkzeugmaschine vorgesehen sein.The fastening element can be designed in different ways. It can e.g. a threaded bolt, wherein the protruding from the handle end is threaded to screw the fastener into the housing of a power tool. Instead of a thread, e.g. a tensioning device may be provided for connecting the handle to the housing of a hand tool machine.

In einer weiteren alternativen Ausführungsform kann das Befestigungselement in Form einer Aufnahmehülse mit einer Schraubenmutter ausgeführt sein. Die Aufnahmehülse dient zur Aufnahme einer Schraube, die mit der Schraubenmutter verbindbar ist. Dabei kann eine Schraube an dem Gehäuse der Handwerkzeugmaschine angebracht sein. Zum Anbringen des Handgriffs an der Handwerkzeugmaschine wird die Schraube in die Aufnahmehülse eingeführt und mit der Schraubenmutter verschraubt. Die Schraube kann z.B. über eine Spannvorrichtung an dem Gehäuse angebracht sein.In a further alternative embodiment, the fastening element may be designed in the form of a receiving sleeve with a nut. The receiving sleeve serves to receive a screw which is connectable to the nut. In this case, a screw may be attached to the housing of the power tool. To attach the handle to the power tool, the screw is inserted into the receiving sleeve and bolted to the nut. The screw may for example be attached to the housing via a tensioning device.

Das Befestigungselement kann zusätzlich mit einem Trägerelement versehen sein. Das Befestigungselement kann z.B. in einem Trägerelement aufgenommen sein.The fastening element may additionally be provided with a carrier element. The fastener may e.g. be included in a support element.

Der erfindungsgemäße Handgriff hat vorzugsweise die Form eines Stiles, Stabes o.dgl. Dabei hat das Griffelement des Handgriffs eine im Wesentlichen zylindrische Form. Dies kann in einer einfachen Ausführungsform ein Zylinder sein. In einer weitergehenden Ausführungsform kann das zylinderförmige Griffelement jedoch auch an die Ergonomie der menschlichen Hand angepasst sein, indem es abweichend von einer reinen Zylinderform entlang seiner Längsachse beispielsweise unterschiedliche Durchmesser aufweist. Das Griffelement kann rotationssymmetrisch ausgeführt sein, so dass der Handgriff in beliebiger Ausrichtung vom Bediener greifbar ist. Alternativ kann das Griffelement auch so speziell an die Ergonomie der menschlichen Hand angepasst sein, dass ein erster Bereich des Griffelements speziell als Auflagefläche für die Handfläche und ein zweiter Bereich als Auflagefläche für die Finger dient.The handle according to the invention preferably has the shape of a style, rod or the like. The handle element of the handle has a substantially cylindrical shape. This may be a cylinder in a simple embodiment. In a further embodiment, however, the cylindrical gripping element can also be adapted to the ergonomics of the human hand by having, for example, different diameters apart from a pure cylindrical shape along its longitudinal axis. The gripping element can be rotationally symmetrical, so that the handle can be grasped in any orientation by the operator. Alternatively, the gripping element can also be so specially adapted to the ergonomics of the human hand that a first area of the gripping element serves specifically as a support surface for the palm and a second area as a support surface for the fingers.

Weiterhin kann das Griffelement einteilig oder mehrteilig ausgeführt sein. Ein Handgriff mit einem einteiligen Griffelement hat beispielsweise ein stabförmiges Griffelement, z.B. aus einem thermoplastischen Kunststoff, mit einem Befestigungselement an einem Ende des Griffelements. Ein zweiteiliges Griffelement dagegen hat beispielsweise einen Griffkern aus einem harten Material, z.B. einem thermoplastischen Kunststoff, und einer Griffhülle aus einem weichen Material, z.B. einem elastischen Kunststoff. Die Griffhülle kann den Griffkern ganz oder teilweise umgeben.Furthermore, the handle element can be made in one piece or in several parts. For example, a handle having a one-piece handle member has a rod-shaped handle member, e.g. made of a thermoplastic material, with a fastening element at one end of the grip element. By contrast, a two-part handle element, for example, has a handle core made of a hard material, e.g. a thermoplastic, and a handle made of a soft material, e.g. an elastic plastic. The handle cover can completely or partially surround the handle core.

Ein weiterer Gegenstand der Erfindung betrifft eine Handwerkzeugmaschine mit einem erfindungsgemäßen Handgriff. Die Handwerkzeugmaschine ist insbesondere ein Winkelschleifer, eine Bohr- oder Schlagbohrmaschine oder ein Schrauber oder Bohrschrauber.Another object of the invention relates to a hand tool with a handle according to the invention. The hand tool is in particular an angle grinder, a drill or impact drill or a screwdriver or drill.

Nachfolgend wird die Erfindung anhand der beigefügten Zeichnungen näher erläutert. Es zeigen

Figur 1
eine erste Ausführungsform des erfindungsgemäßen Handgriffs in schematischer Darstellung
Figur 2
eine zweite Ausführungsform des erfindungsgemäßen Handgriffs in schematischer Darstellung
Figur 3
eine dritte Ausführungsform des erfindungsgemäßen Handgriffs in schematischer Darstellung.
The invention will be explained in more detail with reference to the accompanying drawings. Show it
FIG. 1
a first embodiment of the handle according to the invention in a schematic representation
FIG. 2
a second embodiment of the handle according to the invention in a schematic representation
FIG. 3
a third embodiment of the handle according to the invention in a schematic representation.

In Fig. 1 ist eine erste Ausführungsform eines erfindungsgemäßen Handgriffs 100 dargestellt. Der Handgriff 100 eignet sich als Zusatzhandgriff für eine Handwerkzeugmaschine (nicht dargestellt). Er umfasst ein Griffelement 20, ein Befestigungselement 10 mit Trägerelement 15 und ein zwischen Griffelement 20 und Trägerelement 15 bzw. Befestigungselement 10 angeordnetes Dämpfungselement 30.In Fig. 1 a first embodiment of a handle 100 according to the invention is shown. The handle 100 is suitable as an additional handle for a hand tool (not shown). It comprises a grip element 20, a fastening element 10 with carrier element 15 and a damping element 30 arranged between grip element 20 and carrier element 15 or fastening element 10.

Das Griffelement 20 ist stilartig und zylinderförmig ausgeführt. Im Inneren des Griffelements 20 ist ein Hohlraum 21 ausgebildet. Der Hohlraum 21 kann ggf. mit einem Dämpfungsmaterial, z.B. einem Schaum, einem Elastomer oder mit einem Fluid (Luft, Wasser, Öl) gefüllten Kissen, Waben o.dgl. ausgefüllt sein.The grip element 20 is executed in a style and cylindrical. In the interior of the grip element 20, a cavity 21 is formed. The cavity 21 may optionally be coated with a damping material, e.g. a foam, an elastomer or with a fluid (air, water, oil) filled pillows, honeycomb or the like. filled out.

Der Handgriff 100 ist über ein Befestigungselement 10, welches mit dem Trägerelement 15 verbunden ist, mit einem Gehäuse einer Handwerkzeugmaschine verbindbar. Das Befestigungselement 10 ist in der dargestellten Ausführungsform ein Gewindebolzen, dessen freies Ende mit einem Gewinde versehen ist und aus dem Handgriff 100 bzw. dem Trägerelement 15 herausragt, so dass es in ein Gehäuse einer Handwerkzeugmaschine einschraubbar ist.The handle 100 is connectable via a fastening element 10, which is connected to the carrier element 15, with a housing of a hand tool machine. The fastener 10 is in the illustrated embodiment, a threaded bolt, the free end is provided with a thread and protrudes from the handle 100 and the support member 15 so that it can be screwed into a housing of a power tool.

Zwischen dem Griffelement 20 einerseits und dem Trägerelement 15 und dem Befestigungselement 10 andererseits ist erfindungsgemäß ein Dämpfungselement 30 mit zumindest einer Gelenkeinheit 32, 52 vorgesehen. Die Gelenkeinheiten 32, 52 gemäß Fig. 1 und 2 sind dreiachsige Gelenkeinheiten, bei der dreiachsigen Gelenkeinheit 32, 52 um ein elastisches Kugelgelenk. Die Gelenkeinheiten 32, 52 sind dadurch elastisch ausgebildet, dass zumindest eine Komponente der mehrachsigen Gelenkeinheit aus einem Elastomer gebildet ist.Between the handle member 20 on the one hand and the support member 15 and the fastener 10 on the other hand, a damping element 30 according to the invention with at least one hinge unit 32, 52 is provided. The hinge units 32, 52 according to Fig. 1 and 2 are three-axis joint units, in the three-axis joint unit 32, 52 to an elastic ball joint. The hinge units 32, 52 are formed elastically in that at least one component of the multi-axis hinge unit is formed from an elastomer.

Fig. 1 zeigt eine erste Ausführungsform eines elastischen Kugelgelenks. Dabei bildet ein elastisches Kugelelement 33 ein erstes Gelenkelement 38. Das Kugelelement 33 bildet ein Verbindungselement zwischen dem Griffelement 20 und dem Befestigungselement 10. Das Kugelelement 33 ist in einer komplementären Aufnahme 34 in dem Griffelement 20 und dem Befestigungselement 10 angeordnet. Die Aufnahme 34 bildet ein zweites Gelenkelement 39. Die Aufnahme 34 wird gebildet, indem das Befestigungselement 10 und das Griffelement 20 jeweils eine im Wesentlichen halbkugelförmige Aufnahme 35, 36 aufweisen. Das Kugelelement 33 besteht aus einem Elastomer, beispielsweise einem thermoplastischen Elastomer, welches zwischen das Griffelement 20 und das Befesfigungselement 10 mittels eines Spritzgießverfahrens gespritzt werden kann. Dabei wird das in das Trägerelement 15 hineinragende Ende des Befestigungselement 10, hier der Kopf des Gewindebolzens, umspritzt. An dem Griffelement 20 kann ebenfalls eine Schraube 22 vorgesehen sein, welche von dem Elastomer umspritzt ist. Fig. 1 shows a first embodiment of an elastic ball joint. An elastic ball element 33 forms a first joint element 38. The ball element 33 forms a connecting element between the grip element 20 and the fastening element 10. The ball element 33 is arranged in a complementary receptacle 34 in the grip element 20 and the fastening element 10. The receptacle 34 forms a second hinge element 39. The receptacle 34 is formed by the fastening element 10 and the grip element 20 each having a substantially hemispherical receptacle 35, 36. The ball element 33 consists of an elastomer, for example a thermoplastic elastomer, which can be injected between the grip element 20 and the fastening element 10 by means of an injection molding process. In this case, the projecting into the support member 15 end of the fastener 10, here the head of the threaded bolt, overmolded. On the handle member 20 may also be provided a screw 22 which is encapsulated by the elastomer.

Der Handgriff 100 ist außerdem mit einem Sicherungselement 40 ausgestattet, welches im Falle des Versagens des Dämpfungselements 30 das Trennen des Griffelements 20 von dem Befestigungselement 10 bzw. dem Trägerelement 15 verhindert. Das Sicherungselement 40 ist im Wesentlichen zentriert im Handgriff 100 zwischen dem Befestigungselement 10 und dem Griffelement 20 angeordnet. Bei Versagen des Dämpfungselements 30 aufgrund von Beschädigung oder Ermüdung des Dämpfungsmaterials wird durch das Sicherungselement 40 verhindert, dass das Griffelement 20 von dem Befestigungselement 10 getrennt werden kann. Das Sicherungselement 40 ist von einem biegeweichen Bauteil gebildet, z. B. einem flexiblen Band, Seil, Geflecht o.dgl. aus Metall oder Kunststoff.The handle 100 is also equipped with a securing element 40 which, in the event of failure of the damping element 30, prevents the separation of the grip element 20 from the fastening element 10 or the carrier element 15. The securing element 40 is arranged substantially centered in the handle 100 between the fastening element 10 and the grip element 20. In case of failure of the damping element 30 due to damage or fatigue of the damping material is prevented by the securing element 40 that the handle member 20 can be separated from the fastener 10. The securing element 40 is formed by a flexible component, for. B. a flexible band, rope, braid or the like. made of metal or plastic.

Fig. 2 zeigt eine zweite Ausführungsform eines erfindungsgemäßen Handgriffs 200 mit einer Gelenkeinheit 52 in Form eines elastischen Kugelgelenks. Das erste Gelenkelement 38 des Kugelgelenks wird von einem starren Kugelelement 53 gebildet. Das starre Kugelelement 53 ist in der dargestellten Ausführungsform an das Befestigungselement 10 angeformt. Die Aufnahme 54 für das Kugelelement 53 bildet das zweite Gelenkelement 39. Die Aufnahme 54 ist in einer zu dem Kugelelement 53 komplementären Form aus einem elastischen Material, z.B. einem Elastomer, gebildet. Die Aufnahme 54 hat demnach im Wesentlichen die Form einer Hohlkugel. Fig. 2 shows a second embodiment of a handle 200 according to the invention with a hinge unit 52 in the form of an elastic ball joint. The first hinge element 38 of the ball joint is made of a rigid ball element 53 formed. The rigid ball element 53 is formed on the fastening element 10 in the illustrated embodiment. The receptacle 54 for the ball member 53 forms the second hinge member 39. The receptacle 54 is formed in a complementary to the ball member 53 form of an elastic material, such as an elastomer. The receptacle 54 therefore has essentially the shape of a hollow sphere.

In der Ausführungsform nach Fig. 2 ist zusätzlich zu der mehrachsigen Gelenkeinheit 52 als Dämpfungselement ein zweites Dämpfungselement 35 vorgesehen. Das zweite Dämpfungselement 35 umfasst in der dargestellten Ausführungsform ein Paket aus Tellerfedern. Andere Federelemente, wie Blattfedern, Spiralfedern etc. können ebenfalls zum Einsatz kommen. Andere Formen von Dämpfungselementen, wie elastisches Material, z.B. Elastomer, Schaum, oder mit einem Fluid, z.B. Luft, Öl, gefüllte Dämpfungskissen sind ebenfalls in Kombination mit der mehrachsigen Gelenkeinheit 52 einsetzbar. Das Dämpfungselement 35 ist in dem Griffelement 20 unterhalb der Gelenkeinheit 52 angeordnet An das Dämpfungselement 35 ist eine Scheibe 41 mit Gewinde (nicht dargestellt) anliegend angeordnet. Aufgrund des Gewindes ist die Scheibe 41 in ihrer axialen Lage entlang der Längsachse des Griffelements 20 verschiebbar gelagert. Dadurch kann die Scheibe 41 nach oben bewegt werden, um die Vorspannung auf das Dämpfungselement 35 zu erhöhen. Alternativ kann die Scheibe 41 innerhalb des Griffelements 20 nach unten bewegt werden, um die Vorspannung auf das Dämpfungselement 35 zu verringern. Damit ist vorteilhafterweise die Vorspannung des Dämpfungselements 35 einstellbar gestattet, so dass der Benutzer der Handwerkzeugmaschine den erfindungsgemäßen Handgriff 200 auf den jeweiligen Anwendungsfall anpassen kann, indem er die Vorspannung erhöht oder erniedrigt, um eine geringere bzw. stärkere Schwingungsdämpfung zu erzielen.In the embodiment according to Fig. 2 In addition to the multi-axis joint unit 52 as a damping element, a second damping element 35 is provided. The second damping element 35 comprises in the illustrated embodiment, a package of disc springs. Other spring elements, such as leaf springs, coil springs, etc. can also be used. Other forms of damping elements, such as elastic material, for example elastomer, foam, or with a fluid, for example air, oil, filled damping cushions can also be used in combination with the multi-axis joint unit 52. The damping element 35 is arranged in the grip element 20 below the joint unit 52. A disk 41 with thread (not shown) is arranged adjacent to the damping element 35. Due to the thread, the disk 41 is slidably mounted in its axial position along the longitudinal axis of the handle member 20. Thereby, the disc 41 can be moved upward to increase the bias on the damping element 35. Alternatively, the disc 41 may be moved down within the handle member 20 to reduce the bias on the damping member 35. Thus, the bias of the damping element 35 is advantageously adjustable so that the user of the power tool 200 can adapt the handle 200 according to the invention to the particular application by increasing or decreasing the bias to achieve a lower or stronger vibration damping.

Ein weiteres Dämpfungselement 37 ist in Form einer Biegestabfeder vorgesehen. Diese erstreckt sich axial in dem Hohlraum 21 des Griffelements 20. Die Biegestabfeder ist mit dem Befestigungselement 10 über das Kugelelement 53 verbunden. An dem unteren Ende des Griffelements 20 stützt sich die Biegestabfeder an einem Stopfen 23 ab.Another damping element 37 is provided in the form of a bending bar spring. This extends axially in the cavity 21 of the handle member 20. The flexure spring is connected to the fastener 10 via the ball member 53. At the lower end of the handle member 20, the bending bar spring is supported on a plug 23 from.

Eine dritte Ausführungsform eines erfindungsgemäßen Handgriffs 300 mit einer Gelenkeinheit 62 in Form eines elastischen Kugelgelenks ist in Fig. 3 gezeigt. Analog zu der Ausführungsform gemäß Fig. 1 bildet ein elastisches Kugelelement 33 ein erstes Gelenkelement 38. Anders als das Kugelelement 33 gemäß Fig. 1, welches sich in dem Handgriff 100 befindet, ist das Kugelelement 33 gemäß Fig. 3 in einem Gehäuse 60 einer Handwerkzeugmaschine angeordnet, wobei das Gehäuse 60 in Fig. 3 nur ausschnittsweise angedeutet ist. Das Kugelelement 33 ist hierzu in einer komplementären Aufnahme 64 in dem Gehäuse 60 aufgenommen. Die Aufnahme 64 bildet ein zweites Gelenkelement 39. Das Kugelelement 33 besteht aus einem Elastomer, beispielsweise einem thermoplastischen Elastomer, welches in die Aufnahme 64 mittels eines Spritzgießverfahrens gespritzt werden kann.A third embodiment of a handle 300 according to the invention with a hinge unit 62 in the form of an elastic ball joint is shown in FIG Fig. 3 shown. Analogous to the embodiment according to FIG Fig. 1 an elastic ball element 33 forms a first joint element 38. Unlike the ball element 33 according to FIG Fig. 1 which is located in the handle 100 is the ball member 33 according to Fig. 3 arranged in a housing 60 of a power tool, wherein the housing 60 in Fig. 3 only partially indicated. The ball element 33 is accommodated in a complementary receptacle 64 in the housing 60 for this purpose. The receptacle 64 forms a second joint element 39. The ball element 33 consists of an elastomer, for example a thermoplastic elastomer, which can be injected into the receptacle 64 by means of an injection molding process.

Das Befestigungselement 10 in Form eines Gewindebolzens ist mit einem Gewinde (nicht dargestellt) versehen. Das elastische Kugelelement 33 besitzt eine Aufnahme 63 mit einem dem Gewinde des Befestigungselements 10 korrespondierenden Innengewinde (nicht dargestellt), damit das Befestigungselement 10 in die Aufnahme 63, und damit in das Gehäuse 60 der Handwerkzeugmaschine, geschraubt werden kann.The fastener 10 in the form of a threaded bolt is provided with a thread (not shown). The elastic ball member 33 has a receptacle 63 with a thread corresponding to the fastening element 10 corresponding internal thread (not shown), so that the fastener 10 in the receptacle 63, and thus in the housing 60 of the power tool, can be screwed.

Gemäß Fig. 3 ist ferner ein zweites Dämpfungselement 55 vorgesehen, welches aus einem elastischen Material, insbesondere aus einem Elastomer, gebildet ist. Das zweite Dämpfungselement 55 ist zwischen dem Griffelement 20 und dem Gehäuse 60 der Handwerkzeugmaschine angeordnet. Es ist insbesondere zwischen das Griffelement 20 und das Gehäuse 60 geklemmt. Dabei liegt das Dämpfungselement 55 einerseits an dem Flansch 15 des Griffelements 20, andererseits an der Außenfläche 61 des Gehäuses 60 an. Es weist eine Durchführung 56 für das Befestigungselement 10 auf.According to Fig. 3 Furthermore, a second damping element 55 is provided, which is formed from an elastic material, in particular from an elastomer. The second damping element 55 is arranged between the grip element 20 and the housing 60 of the power tool. In particular, it is clamped between the grip element 20 and the housing 60. In this case, the damping element 55 is located on the one hand on the flange 15 of the handle member 20, on the other hand on the outer surface 61 of the housing 60 at. It has a passage 56 for the fastening element 10.

Claims (13)

  1. Handle, in particular auxiliary handle, for a portable power tool, having a grip element (20) and a fastening element (10) for fastening the handle to a portable power tool, and also having a damping element (30) having a multi-axis joint unit (32, 52, 62), wherein the joint unit (32, 52, 62) is a ball joint, characterized in that the ball joint has an elastic ball element (33), wherein the ball element (33) consists of an elastomer.
  2. Handle according to Claim 1, characterized by a three-axis joint unit (32, 52, 62).
  3. Handle at least according to Claim 1, characterized in that the joint unit (32, 62) has a first and second joint element (38, 39), wherein the first joint element (38) is elastically designed.
  4. Handle according to either of Claims 1 and 3, characterized in that the second joint element (39) of the joint unit (52) is elastically designed.
  5. Handle according to one of Claims 1, 3 and 4, characterized in that the first and/or second joint element (38, 39) is formed from an elastomer.
  6. Handle according to one of the preceding claims, characterized in that a rigid ball element (53) is mounted in a receptacle (54) composed of an elastic material, in particular an elastomer.
  7. Handle according to one of the preceding claims, characterized in that the damping element (30) comprises a securing element (40).
  8. Handle according to one of the preceding claims, characterized in that at least a second damping element (50, 55) is provided in addition to the multi-axis joint unit (52).
  9. Handle according to Claim 8, characterized in that the second damping element (50) comprises at least one spring element.
  10. Handle according to Claim 8, characterized in that the second damping element (55) is formed from an elastic material and is arranged between the handle and a housing (60) of a portable power tool.
  11. Handle according to one of the preceding claims, characterized in that the joint unit (32, 52) is arranged in the handle.
  12. Handle according to one of Claims 1 to 10, characterized in that the joint unit (62) is arranged in a housing (60) of the portable power tool.
  13. Portable power tool having a handle according to one of the preceding claims.
EP08717597A 2007-03-15 2008-03-11 Handle with a damping element having a joint unit Active EP2139648B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202007017264U DE202007017264U1 (en) 2007-03-15 2007-03-15 handle
DE102008012380A DE102008012380A1 (en) 2007-03-15 2008-02-28 Handle i.e. auxiliary handle, for hand tool machine e.g. angle grinder, has damping unit arranged at holding unit such that damping unit comes in contact with housing during fastening of handle at housing
PCT/EP2008/052850 WO2008110546A1 (en) 2007-03-15 2008-03-11 Handle with a damping element having a joint unit

Publications (2)

Publication Number Publication Date
EP2139648A1 EP2139648A1 (en) 2010-01-06
EP2139648B1 true EP2139648B1 (en) 2012-06-06

Family

ID=39688446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08717597A Active EP2139648B1 (en) 2007-03-15 2008-03-11 Handle with a damping element having a joint unit

Country Status (2)

Country Link
EP (1) EP2139648B1 (en)
DE (1) DE102008012380A1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10130548B4 (en) 2001-06-25 2008-01-03 Robert Bosch Gmbh Additional handle

Also Published As

Publication number Publication date
DE102008012380A1 (en) 2008-09-18
EP2139648A1 (en) 2010-01-06

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