EP2247413B1 - Poignée isolée des vibrations - Google Patents

Poignée isolée des vibrations Download PDF

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Publication number
EP2247413B1
EP2247413B1 EP09710153A EP09710153A EP2247413B1 EP 2247413 B1 EP2247413 B1 EP 2247413B1 EP 09710153 A EP09710153 A EP 09710153A EP 09710153 A EP09710153 A EP 09710153A EP 2247413 B1 EP2247413 B1 EP 2247413B1
Authority
EP
European Patent Office
Prior art keywords
handle
handle according
fastening
elastic
grip
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.)
Active
Application number
EP09710153A
Other languages
German (de)
English (en)
Other versions
EP2247413A1 (fr
Inventor
Lars Schmid
Johannes Schnitzler
Gerhard Meixner
Christian Koepf
Jan Koalick
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
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Filing date
Publication date
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Publication of EP2247413A1 publication Critical patent/EP2247413A1/fr
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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
    • B25F5/006—Vibration damping means
    • 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
    • B25F5/02—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
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs
    • B25D2250/381—Leaf springs

Definitions

  • the invention relates to a vibration-decoupled handle, in particular a vibration-decoupled auxiliary handle for a hand tool and a hand tool with a vibration-decoupled handle, preferably a vibration-decoupled auxiliary handle according to the preamble of the independent claims.
  • the auxiliary handle has a mounting portion which is connected to a grip portion via a vibration-damping, elastic material.
  • the elastic material forms at least in the region of the connection, the surface of the auxiliary handle.
  • the grip region and the attachment region are connected to one another by the elastic material such that a further connection means is dispensed with.
  • the handle according to the invention in particular additional handle with the features of claim 1 has the advantage that the handle element has a connecting element which surrounds the fastening element radially.
  • the connecting element is rigidly connected to the handle element, preferably embodied integrally therewith.
  • the enclosure may in particular be designed so that the grip element in a Circumferential direction around the fastening element is movable, in particular pivotable, but without being removable from the fastening element in the radial direction.
  • a further advantage is to be considered that the radially enclosing arrangement of a connecting element to the fastener allows a convenient arrangement, in particular receiving a damping device for damping a movement of the handle member relative to the fastener.
  • An advantageous embodiment of a damping device of a handle according to the invention comprises at least one elastic element.
  • the elastic element has in particular a spring element and / or a rubber-elastic material and / or a porous material.
  • the elastic element consists essentially of a rubber-elastic material and / or a porous material.
  • the damping device is arranged between an inner circumferential surface of the connecting element and an outer lateral surface of the fastening element.
  • the inner circumferential surface and the outer circumferential surface are operatively connected to one another by the damping device.
  • the damping device in an effective manner to an element - fastening or connecting element - acting forces attenuated by the damping device to the respective other element - connecting or fastening element - transferred.
  • the elastic element has a rubber-elastic material, which is vulcanized or adhesively bonded to the inner lateral surface of the connecting element and / or the outer lateral surface of the fastening element.
  • a possible uniform effect of the handle according to the invention provides at least one, preferably two radially projecting bearing disks.
  • the contact disks are arranged on the fastening element in such a way that they axially surround a radial enclosing region of the fastening element.
  • the contact disks extend in a radial extent beyond an outer diameter of the outer lateral surface of the fastening element.
  • the contact disks are made in one piece with the fastening element.
  • the elastic element is arranged between the system disks.
  • the elastic element can be supported on the system disks.
  • a particularly comfortable embodiment of a handle according to the invention is achieved by a bow-shaped design of the grip element.
  • the execution as a bar handle due to the larger forces occurring advantageous.
  • the training as a strap handle also allows a comfortable working posture of the operator, since the tool can be guided laterally, without twisting the hand of the operator is necessary.
  • a good vibration damping can be achieved through the closed frame of the auxiliary handle. If the bow-shaped grip element has connecting elements at its two end regions which radially surround the fastening element, a uniform force distribution is achieved.
  • connection areas are substantially the same, preferably identical.
  • the handle element is designed to be pivotable relative to the fastener.
  • an actuating element comprehensive locking device is provided, with which the grip element can be fixed in a selectable pivot position. By actuating the actuating element by an operator, the locking device can be released and fixed again.
  • the selected pivot position defines a rest position of the handle member relative to the fastener.
  • the damping device of the handle according to the invention allows an elastic deflection of the grip element from this rest position.
  • a particularly simple embodiment of a locking device has a toothing.
  • the elastic deflection of the pivoting position is limited starting from the rest position by a limiting means to an angular range W.
  • the elastic deflection of the pivotal position, starting from the rest position in one direction is greater than in the corresponding opposite direction.
  • the hand tool When used in one Working state of the power tool, the hand tool is pressed by the operator by means of the handle according to the invention against a workpiece.
  • the direction of the contact pressure defines a printing direction.
  • the grip element is loaded in this working state in the pressure direction and deflected relative to the fastening element.
  • the elastic deflection is preferably desired in this printing direction.
  • the operator pulls the power tool against the pressure direction of the workpiece away, whereby a pulling direction is defined.
  • the handle element is loaded in the pulling direction.
  • the elastic deflection in the pulling direction is small, preferably negligible, ideally equal to zero.
  • a particularly versatile and comfortable embodiment of a handle according to the invention provides a fixing device for releasably fixing the handle on a machine housing of the power tool.
  • the fixing device is connected to the fastening element.
  • the fixing device can allow a, in a circumferential direction on the machine housing selectable orientation of the handle relative to the machine housing, in particular a machine axis, which further increases the comfort for the operator.
  • the fixing device allows usability of the handle according to the invention on various hand tool machines by exchange.
  • the fixing device can be closed and opened via the actuating element.
  • the fixing device comprises a clamping band, with which the handle can be fixed to the hand tool.
  • tensioning band has recesses which interact with the toothing, a joint actuation of locking device and fixing device is implemented in a particularly simple manner.
  • the fixing device comprises a clamping screw, and the actuating element is designed substantially as a clamping nut.
  • Fig. 1 shows a hammer drill 1 as an example of a power tool with a machine housing 2, an inserted in a tool holder 3 insert tool 4, which defines a machine axis 5, and one, in a front portion 6 of the machine housing 2 as an additional handle 10 formed according to the invention handle.
  • Fig. 2 shows a first embodiment of an executed as an additional handle 10 handle, as in Fig. 1 is used in a side sectional view with a fastener 12 and a handle member 14.
  • the fastener 12 has in the present example, two sub-elements 12a, 12b.
  • the grip element 14 is bow-shaped and has two end portions 16a, 16b.
  • Each end region 16a, 16b comprises a connecting element 18a, 18b, which radially encloses a partial region 19a, 19b of a partial element 12a, 12b as a radial enclosing region of the fastening element 12.
  • the radial enclosure in the end regions 16a, 16b is best in FIG Fig. 4a to recognize.
  • the auxiliary handle 10 further comprises a locking device 20 and a fixing device 22, which are arranged on the fastening element 12 of the auxiliary handle 10 and connected thereto.
  • the locking device 20 and the fixing device 22 are enclosed by the two partial elements 12a, 12b of the fastening element 12.
  • the fastening element 12 comprises a fastening sleeve 24a, 24b in each end region 16a, 16b.
  • the fastening sleeves 24a, 24b are surrounded by the respective associated connecting element 18a, 18b so that in each case a radial space 26a, 26b is formed.
  • a damping device 28a, 28b is provided in each of these radial spaces 26a, 26b.
  • the fastening sleeves 24a, 24b are each provided with an inner bore in the present example.
  • the inner bores are coaxially oriented and serve to receive a clamping screw 30.
  • the clamping screw 30 extends through the entire fastening element 12 and is received on its threaded side by a clamping nut 32 which is received in a locking knob 34 and rotatably connected thereto.
  • the locking knob 34 thus forms an actuating element 36.
  • the clamping screw 30 is supported with its head via a contact disk 37 on the fastening sleeve 24a of the end portion 16a.
  • the actuating element 36 is supported in the end region 16b directly on the mounting sleeve 24b.
  • a corresponding contact washer 37 is also provided in this end region 16b. It is also possible to form the contact disks 37 on the fastening sleeves 24a, 24b, in particular in each case in one piece with them. In an alternative embodiment, the support can also be made directly on the end faces of the sleeves, as shown by way of example in the end region 16b.
  • the locking device 20 comprises a toothing 38a, 38b provided on each fastening sleeve 24a, 24b.
  • the teeth 38a, 38b are formed in the present example on a perpendicular to the clamping screw 30 oriented, inner end face of the mounting sleeves 24a, 24b.
  • the fixing device 22 comprises in the present example, a clamping band 40.
  • the auxiliary handle 10 can be attached to a machine housing 2 of a hand tool, not shown here and fixed.
  • the clamping band In its clamping region 42, the clamping band is provided with two clamping jaws 44a, 44b.
  • the clamping band 40 can be received in correspondingly provided, not shown here, receiving openings in the clamping jaws 44a, 44b.
  • the clamping jaws 44a, 44b may also be formed on the clamping band 40.
  • the clamping jaws 44a, 44b each have a bore for receiving the clamping nut 30.
  • the clamping backbones 44a, 44b each have depressions 46a, 46b.
  • the depressions 46a, 46b interact with the teeth 38a, 38b of the fastening sleeves 24a, 24b in such a way that the fastening sleeves 24a, 24b are pivoted about the clamping screw 30 as pivot axis 48 with respect to alignment of the tension band and locked in the selected pivot position by tightening the clamping nut 32 can be.
  • the clamping band 40 is clamped over the clamping jaws 44a, 44b at the same time, so that the auxiliary handle 10 is fixed to the machine housing of the power tool.
  • a circumferential position of the auxiliary handle 10 can be changed relative to the machine housing by turning the auxiliary handle 10 in a circumferential direction of the clamping band 40.
  • the auxiliary handle 10 is fixed in the new circumferential position.
  • a grip position of the grip element 14 can thus be optimally adapted to a work situation in two axes, so that the operator can comfortably guide the handheld power tool.
  • the abutment disc 37 ensures that no clamping forces 50a, 50b act on the damping devices 28a, 28b, so that their effectiveness does not depend on the currently applied tensioning forces 50a, 50b. Regardless of the clamping force 50a, 50b as well as the pivoting and circumferential position of the handle member 14, the damping devices 28a, 28b unfold their effects, so that occurring vibrations of the machine housing of the power tool largely independent of pivot and circumferential position of the auxiliary handle 10 damped on the handle member 14 are transmitted.
  • the damping devices 28a, 28b are designed so that the handle element 14, in particular in a working state in which the hand tool is pressed against the same by the operator with an insert tool for machining a workpiece, is largely isolated from the vibrations.
  • a surface of the handle member 14 may be partially or completely provided with an elastic material, in particular an elastomer and / or a porous foam and / or an elastic fabric, to improve the damping properties and the ease of use.
  • an elastic material in particular an elastomer and / or a porous foam and / or an elastic fabric, to improve the damping properties and the ease of use.
  • Fig. 3a to 3d are two further developments of the auxiliary handle Fig. 2 shown.
  • the show Fig. 3a and 3b a second embodiment and the Fig. 3c and 3d a third embodiment of an auxiliary handle 10, in which an area of action of the damping devices 28a, 28b is limited to a range of motion, in particular an angular range W in the pivoting direction about the rest position.
  • the same reference numerals are used for the same elements.
  • Fig. 3a shows a side view of an additional handle 10, the handle member 14 oriented at its end portions 16a, 16b to the fastener 12 out parallel to a handle portion 52 of the handle member 14 inwardly oriented, wedge-shaped stop projections 54a, 54b.
  • the fastening sleeves 24a, 24b have radially oriented abutment recesses 56a, 56b in their cylindrical regions which carry the toothings 38a, 38b.
  • the stop extensions 54a, 54b project with their fastening element 12 oriented free end in this stop recesses 56a, 56b. This is especially good in Fig. 3b to see which is a sectional view taken along the line B - B Fig. 3a shows.
  • the abutment extensions 54a, 54b have two contact surfaces 58a, 59a, 58b, 59b along a longitudinal extent extending parallel to the pivot axis 48.
  • the stop recesses 56a, 56b are distinguished by two stop faces 60a, 61a, 60b, 61b extending parallel to the pivot axis 48, which interact with the respective contact surfaces 58a, 59a, 58b, 59b in such a way that a pivoting movement of the grip element 14, in particular a pivoting movement Deflection of the handle member 14 from the rest position is limited to the angle range W.
  • Each pair of abutment extension 54a, 54b and abutment recess 56a, 56b acts as a limiting means 62a, 62b, by which the elastic deflection of the pivot position is limited starting from the rest position. With this limiting means possible overloading of the damping device 28a, 28b, in particular by stretching and / or draft loads are largely prevented in a simple manner.
  • a hand tool in particular a drill and / or chisel hammer occur at least three different operating conditions, which is supported by an advantageous development of the handle according to the invention.
  • the handle In the working state, the handle is loaded by the operator in a pressure direction RD on the grip element 14, which is determined by a pressing of the insert tool against the workpiece.
  • vibrations occur in the machine housing due to the effects of a drive device arranged in the machine housing for driving the insert tool and / or repercussions of a working process between the insert tool and the workpiece can be transferred to the handle.
  • a transition state In a second operating state, which results in the transition from the working state to an idle state, and is referred to as a transition state, the hand tool is removed or released by a, applied by the operator on the handle tensile force from the workpiece.
  • the direction of the tensile force can analogously be referred to as the pulling direction RZ on the handle element.
  • the limiting means 62a, 62b of the auxiliary handle 10 are designed so that the elastic deflection of the pivot position starting from the rest position in one direction, preferably the pressure direction RD on the handle element, is greater than in an opposite direction, preferably the pulling direction RZ on handle element.
  • the stop extension 54a, 54b is shown asymmetrically in the angular range W of the stop recess 56a, 56b.
  • the abutment surface 59a, 59b lying in the direction of pressing include an angle WD with the abutment surface 61a, 61b in the rest position shown.
  • the oriented in the pulling direction abutment surface 58a, 58b include an angle WZ with the abutment surface 60a, 60b.
  • the angle WD is made larger than the angle WZ.
  • the angle WZ is very small, preferably chosen to be almost equal to zero.
  • a limiting means 62 for limiting the elastic deflection.
  • stop extensions 54a ', 54b' are provided on the connecting elements 18a, 18b.
  • these stop projections 54a ', 54b' are arranged on the side facing away from the grip element 14 or the tension band facing side of the connecting elements 18a, 18b.
  • the stop projections 54a ', 54b' are designed as hollow cylinder segments which extend parallel, preferably coaxially to the pivot axis 48 in the direction of the clamping jaws 44a, 44b.
  • the fastening sleeves 24a, 24b each have a stop recess 56a ', 56b' which receive the stop projections 54a ', 54b', in particular in the circumferential direction. This is especially good in Fig. 3d to see.
  • Analogous to the embodiment of Fig. 3b are at the abutment extensions 54a ', 54b' contact surfaces 58a ', 59a', 58b ', 59b' and to the Stop recesses 56a ', 56b' abutment surfaces 60a ', 61a', 60b ', 61b'.
  • two different angles WD, WZ between the surface pairings of abutment surface 58a ', 58b' and abutment surface 60a ', 60b' or abutment surface 59a ', 59b' and stop surface 61a ', 61b' are formed in such a way that in the printing direction RD on the handle member a greater elastic deflection can be made from the rest position than in the pulling direction RZ on the handle element.
  • FIGS. 4a to 7b show different embodiments of a damping device 28 for a handle according to the invention.
  • views of the fastening element 12 and connecting element 18 are shown in the end region 16 of the grip element 14, wherein the representation respectively shows the grip element 14 in the rest position. Since only one end region is shown in each case, the reference a or b is omitted in the following.
  • the embodiments shown are suitable for both end portions 16a, 16b of a bow-shaped handle according to the invention. The illustrations are therefore not to be understood as limiting to handles with only one connecting element 18, but can be used regardless of the number of connecting elements 18 in this.
  • Fig. 4a to 4d four embodiments of a damping device 28 with an elastic member 64 are shown.
  • the elastic member 64 is in the embodiments of Fig. 4a to 4d is designed as a spring element 66.
  • the representations of the Fig. 4a to 4c show here sectional views of the handle according to the invention along the line A - A from Fig. 2 ,
  • Fig. 4a the end portion 16 of a fourth embodiment is shown with the connecting element 18 which radially surrounds the fastening element 12.
  • the damping device 28 is arranged in a gap 67, which extends between the fastening element 12 and the connecting element 18.
  • the Damping device 28 comprises a designed as a spring element 66 elastic element 64, which is designed as a leaf spring 68.
  • a radially inwardly oriented first hook element 71 is provided on an inner circumferential surface 70 of the connecting element 18.
  • a radially outwardly oriented second hook element 73 is provided on an outer lateral surface 72.
  • the leaf spring 68 is hooked with its first, designed as a radially outwardly directed hook end 74 on the first hook member 71.
  • the second, designed as a radially inwardly directed hook end 75 of the leaf spring 68 is hooked to the second hook member 73.
  • the leaf spring 68 extends radially about the fastening element 12 between its first end 74 and its second end 75. In the present example, in the rest position of the grip element 14 shown here, the leaf spring 68 completely encloses the fastening element 12 approximately once.
  • the leaf spring 68 acts on the grip element 12 in a restoring manner. If vibrations occur on the machine housing during operation of the power tool, they are transmitted to the grip element 12 in a damped manner by the leaf spring 68.
  • the extent of the leaf spring 68 can be varied.
  • Fig. 4b the end region 16 of a fifth exemplary embodiment with a damping device 28 comprising a spring element 66 is shown.
  • the spring element 66 is designed as a helical compression spring 76.
  • the connecting element 18 on its inner circumferential surface 70 with a first, radially inwardly directed support member 77 and the fastener 12 on its outer circumferential surface 72 with a second, radially outwardly directed support member 78 is provided.
  • the support elements 77, 78 each have a contact surface 79, 80, which are oriented in the circumferential direction.
  • the helical compression spring 76 is supported with its ends on a respective contact surface 79, 80.
  • the two support elements 77, 78 are arranged adjacent to one another, so that the helical compression spring 76 almost encloses the fastening element 12 in the rest position of the grip element 14.
  • the two support elements 77, 78 executed radially overlapping, so that they act as a limiting means 62 at the same time.
  • a deflection of the grip element 14 in the pulling direction RZ is limited to a small angle WZ.
  • the angle is WZ almost zero.
  • the helical compression spring 76 acts on the grip element 14 to damp vibrations which, starting from the machine housing, are transferred almost undamped to the fastening element 12.
  • Fig. 4c shows a further embodiment variant with a helical tension spring 82 as a spring element 66 as a sixth embodiment of a handle according to the invention.
  • the helical tension spring 82 has two end regions 83, 83 '.
  • the hook or support elements 71, 72, 77, 78 each have a receiving element.
  • an end portion 83, 83 'of the coil spring 82 is received and connected to the respective hook or support members 71, 72, 77, 78.
  • the receiving elements are designed as receiving bores 84, 85.
  • the end regions 83, 83 'of the helical tension spring 82 are hook-shaped, received in the receiving bores 84, 85 and hooked to the hook or support elements 71, 72, 77, 78. In a deflection of the handle member 14 from the rest position of this is offset by the coil spring 82 in the rest position.
  • the mode of action is therefore analogous to the exemplary embodiments Fig. 4a and 4b ,
  • the helical tension spring 82 may be otherwise provided e.g. by gluing, clamping or similar processes to the hook or support elements 71, 72, 77, 78 are fastened.
  • a damping device 28 is shown as a seventh embodiment.
  • the figure shows a, parallel to the clamping screw 30 longitudinal section through a side view of an end portion 16.
  • the elastic member 66 of the damping device 28 is designed here as a torsion spring 86 which surrounds the fastening sleeve 24 coaxially.
  • the end portions of the torsion spring 86 are designed as insertion ends 87, 87 '.
  • the connecting element 18 is provided with a frontal end 88, which extends perpendicular to the clamping screw 30.
  • One of the torsion spring 86 facing end surface of the conclusion 88 has a Einsteckbohrung 90 for receiving the insertion end 87 of the torsion spring 86.
  • the insertion hole 90 acts as a receiving element.
  • the tooth surface facing away from the end face of the mounting sleeve 24 also has a Einsteckbohrung 90 ', which receives the second insertion end 87' of the torsion spring 86. If the grip element 14 is deflected out of its rest position about the pivot axis 48, the torsion spring 86 generates a restoring force.
  • the mode of action is therefore analogous to the exemplary embodiments Fig. 4a to 4c ,
  • the person skilled in the art is familiar with further suitable receiving elements which can be used in a handle according to the invention for fastening the torsion spring 86.
  • the torsion spring 86 may be otherwise provided e.g. be attached by gluing, clamping or similar processes on the fastener 12 and the connecting element 18.
  • FIG Fig. 5a An eighth embodiment of the handle according to the invention with a damping device 28 is shown in FIG Fig. 5a shown.
  • a rubber-elastic material 92 is inserted between the fastening sleeve 24 of the fastening element 12 and the connecting element 18.
  • the rubber-elastic material 92 is connected to the outer circumferential surface 70 of the fastening sleeve and the inner lateral surface 72 of the connecting element 18.
  • the connection can be made by mounting or vulcanization and / or gluing.
  • An alternative connection provides surface structures on the inner and outer lateral surface 70, 72, to which a damping element 93 made of the rubber-elastic material 92 is inserted or used.
  • the rubber-elastic material 92 undergoes a torsion about the pivot axis 48, so that the deflection is only transmitted in a damped manner to the fastening element 12.
  • the fastening element 12 experiences forces due to transmitted vibrations. Also in this case, only a muted transfer to the grip element 14 takes place, so that the grip element 14 is largely decoupled from the vibrations.
  • Fig. 5b shows a ninth embodiment of an end portion 16 with a damping device 28.
  • the fastening sleeve 24 in this case has a quadrangular outer contour 94.
  • the connecting element 18 has a, also quadrangular inner contour 96.
  • WK angle
  • WK angle
  • a gap 98 which extends between the outer contour 94 and the inner contour 96, is filled with a porous material.
  • the porous material 100 is compressed in a direction of rotation of the inner contour 96. As a result, the porous material 100 has a damping effect on the deflection.
  • Fig. 5c shows a tenth embodiment with a modification of the outer contour 94 and the inner contour 96.
  • the mounting sleeve 24 in this case has a wing-shaped outer contour 94 '.
  • the inner contour 96 'of the connecting element 18 is provided with two radially inwardly drawn protuberances 102.
  • a rubber-elastic material 92nd or a porous material 100 is provided as a damping element 66.
  • the protuberances 102 each have a radial stop surface 104. In the rest position of the grip element 14 shown here, the wings 106 of the fastening sleeve 24 are positioned adjacent to the stop surfaces 104.
  • the damping element 66 acts asymmetrically on deflections on the grip element 14. If the grip element 14 is deflected along the direction of the arrow RD, which preferably corresponds to the pressure direction on the grip element 14, the deflection is transmitted only damped. However, acts a force in the direction of RZ, the damping element 66 is almost ineffective.
  • FIG. 6a and 6b show an eleventh and twelfth embodiment of an end portion with a damping device 28 of a handle according to the invention.
  • the figure shows a section through the handle according to the invention along the line A - A from Fig. 2 .
  • the predominantly hollow cylindrical connecting element 18 is provided at the end region 16 of the grip element 14.
  • the connecting element 18 encloses the fastening sleeve 24 of the fastening element 12, wherein a gap 108 between the inner circumferential surface of the connecting element 18 and the fastening sleeve 24 is formed.
  • the fastening sleeve 24 has four radially outwardly directed, evenly distributed over the circumference, lamellar radial extensions 110.
  • the inwardly directed radial extensions 112 are tilted by an angle WL in relation to the outwardly directed radial extensions 110 Fig. 6a is the angle WL in the rest position about 45 °.
  • an existing, an elastic material air spring 114 is also provided.
  • the air spring 114 is designed here as a molded part, which has four radially inwardly directed grooves 116 and four radially outwardly directed grooves 118.
  • the receiving grooves 116,118 are distributed uniformly over the circumference of the air spring 114 analogous to the radial projections, so that the inwardly directed receiving grooves 116 receive the inwardly directed radial extensions 112 and the outwardly directed receiving grooves 118, the outwardly directed radial extensions 110.
  • the air spring 114 has an open honeycomb structure 120 with air corrugations 122. About size and geometry of the air honeycomb 122, an elasticity of the air spring 114 can be selectively produced.
  • the alternating inwardly and outwardly directed radial extensions 110, 112 form a limiting means 62, which limits the elastic deflection of the pivoting position from the rest position to an angular range W.
  • the elastic deflection of the pivoting position starting from the rest position in one direction can be carried out in a simple manner in a larger direction than in an opposite direction.
  • the elastic deflection in the pressure direction on the grip element 14 is significantly greater than in the pulling direction.
  • Fig. 6b shows a further possibility with which the elastic deflection of the pivoting position, starting from the rest position in one direction can be made greater than in an opposite direction.
  • the honeycomb structure 120 of the air spring 114 has, starting from the inwardly directed radial extensions 112, an asymmetrical shape of the air cores 122.
  • air cells 122 are provided only one side of each radial extension.
  • Radial projections 110, 112 shown are also suitable in combination with a porous material 100 for the production of a damping device 28, as shown in FIG Fig. 7a is shown.
  • This embodiment can be considered as thirteenth embodiment.
  • the mode of action is analogous to the action of the air spring 114 Fig. 6a , In the case of an elastic deflection from the rest position, the radial extensions compress the porous material 100 lying in front of these extensions in a direction of movement, as a result of which the movement undergoes damping.
  • Fig. 7b shows the already under Fig. 6a described possibility as a fourteenth embodiment by design of the angle WL, the elastic deflection of the pivot position starting from the rest position in one direction to be made greater than in an opposite direction.
  • Inventive damping devices 28 are not limited to the specific number of radial extensions 110, 112.
  • the choice of a rubber-elastic material for the air spring or the porous material may require other numbers of radial extensions 110, 112.
  • the Concrete shape of the radial extensions 110, 112 and their execution may vary without affecting the spirit of the invention.

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

Claims (20)

  1. Poignée, en particulier poignée supplémentaire (10), pour le guidage d'une machine-outil à main, comprenant au moins un élément de fixation (12, 12a, 12b) et un élément de préhension (14) mobile par rapport à l'élément de fixation (12, 12a, 12b), l'élément de préhension (14) comprenant au moins un élément de liaison (18, 18a, 18b) qui comporte un dispositif d'amortissement (28, 28a, 28b) et au moyen duquel l'élément de préhension (14) est relié à l'élément de fixation (12, 12a, 12b) de telle sorte que l'élément de préhension (14) soit réalisé de manière pivotante par rapport à l'élément de fixation (12, 12a, 12b), et un dispositif de blocage (20) qui comporte un élément d' actionnement (34, 36) étant prévu, à l'aide duquel dispositif de blocage la région de préhension (14) peut être fixée de manière libérable dans une position de pivotement sélectionnable, une position de pivotement sélectionnée définissant la position de repos de l'élément de préhension (14) par rapport à l'élément de fixation (12, 12a, 12b), et le dispositif d'amortissement (28, 28a, 28b) autorisant une déviation élastique de l'élément de préhension (14) à partir de la position de repos, caractérisée en ce que l'élément de liaison (18, 18a, 18b) entoure radialement l'élément de fixation (12, 12a, 12b), et en ce que le dispositif d'amortissement (28, 28a, 28b) est disposé entre une surface d'enveloppe intérieure (70) de l'élément de liaison (18, 18a, 18b) et une surface d'enveloppe extérieure (72) de l'élément de fixation (12, 12a, 12b, 24, 24a, 24b) et relie fonctionnellement ces dernières l'une à l'autre.
  2. Poignée selon la revendication 1, caractérisée en ce que le dispositif d'amortissement (28, 28a, 28b) comprend au moins un élément élastique (64), en particulier un élément de ressort (66, 68, 76, 82, 86, 114) et/ou un matériau présentant l'élasticité du caoutchouc (92) et/ou un matériau poreux (100).
  3. Poignée selon la revendication 2, caractérisée en ce que l'élément élastique (64) du dispositif d'amortissement (28, 28a, 28b) est constitué essentiellement du matériau présentant l'élasticité du caoutchouc (92) et/ou du matériau poreux (100).
  4. Poignée selon la revendication 2 ou 3, caractérisée en ce que l'élément élastique (64) comprend un matériau présentant l'élasticité du caoutchouc (92) qui est vulcanisé ou collé sur la surface d'enveloppe intérieure (70) de l'élément de liaison (18, 18a, 18b) et/ou la surface d'enveloppe extérieure (72) de l'élément de fixation (12, 12a, 12b, 24, 24a, 24b).
  5. Poignée selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins un, de préférence deux disques d'appui (37), qui font saillie radialement, qui sont disposés sur l'élément de fixation (12, 12a, 12b), et qui sont de préférence réalisés d'une seule pièce avec ce dernier, sont prévus, lesquels disques d'appui flanquent axialement une région d'enceinte radiale (19, 19a, 19b) de l'élément de fixation (12, 12a, 12b).
  6. Poignée selon la revendication 5 et selon l'une quelconque des revendications 2 à 4, caractérisée en ce que l'élément élastique (64) est disposé entre les disques d'appui (37) et est protégé par ces derniers.
  7. Poignée selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de préhension (14) est réalisé en forme d'arceau et comprend, au niveau des deux régions d'extrémité (16, 16a, 16b), des éléments de liaison (18, 18a, 18b) dans deux régions d'enceinte (19, 19a, 19b) qui entourent radialement l'élément de fixation (12, 12a, 12b).
  8. Poignée selon la revendication 7, caractérisée en ce que les régions d'enceinte (19, 19a, 19b) sont essentiellement de structure semblable, de préférence de structure identique.
  9. Poignée selon la revendication 1, caractérisée en ce que le dispositif de blocage (20) comprend une denture (38) pour le blocage.
  10. Poignée selon la revendication 1 ou 9, caractérisée en ce qu'un moyen de limitation (62) est prévu, lequel limite à une plage angulaire (W) la déviation élastique de la position de pivotement à partir de la position de repos.
  11. Poignée selon la revendication 10, caractérisée en ce que le moyen de limitation (62) est réalisé de telle sorte que la déviation élastique de la position de pivotement à partir de la position de repos soit supérieure dans un sens, de préférence un sens de pression (RD) sur l'élément de préhension (14), à celle dans un sens opposé, de préférence un sens de traction (RZ) sur l'élément de préhension (14).
  12. Poignée selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un dispositif de fixation (22) est prévu pour la fixation libérable de la poignée à un boîtier (2) de la machine-outil à main, lequel dispositif de fixation est relié à l'élément de fixation (12, 12a, 12b) de la poignée.
  13. Poignée selon la revendication 12, caractérisée en ce que le dispositif de fixation (22) peut être fermé et ouvert au moyen de l'élément d'actionnement (34, 36).
  14. Poignée selon la revendication 12 ou 13, caractérisée en ce que le dispositif de fixation (22) comporte une bande de serrage (40) à l'aide de laquelle la poignée peut être fixée à la machine-outil à main.
  15. Poignée selon la revendication 14, caractérisée en ce que la bande de serrage (40) comprend des évidements (46a, b) qui coopèrent avec des dentures (38) sur l'élément de fixation (12, 12a, 12b).
  16. Poignée selon l'une quelconque des revendications 12 à 14, caractérisée en ce que le dispositif de fixation (22) comporte une vis de serrage (30), et l'élément d'actionnement (34, 36) est réalisé essentiellement en tant qu'écrou de serrage (32).
  17. Poignée selon la revendication 16, caractérisée en ce que l'écrou de serrage (32) s'appuie contre un disque d'appui (37).
  18. Poignée selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'élément élastique (64) du dispositif d'amortissement (28, 28a, 28b) est réalisé sous forme de ressort pneumatique (114) qui comprend des alvéoles d'air (122) formées de manière asymétrique, de préférence uniquement prévues dans un sens périphérique du ressort pneumatique (114).
  19. Poignée selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'il se forme à chaque fois un espace intermédiaire (108) entre les éléments de liaison (18, 18a, 18b) et les éléments de fixation (12, 12a, 12b), et en ce que des prolongements radiaux (110, 112) orientés à chaque fois vers l'espace intermédiaire (108) sont prévus sur une surface d'enveloppe intérieure (70) des éléments de liaison (18, 18a, 18b) et sur une surface d'enveloppe extérieure (72) des éléments de fixation (12, 12a, 12b, 24, 24a, 24b), l'angle (WL) entre un prolongement radial (110) respectif orienté vers l'extérieur et un prolongement radial (112) respectif orienté vers l'intérieur étant supérieur dans un sens périphérique de l'élément élastique (64) à celui dans le sens périphérique opposé.
  20. Machine-outil à main, en particulier marteau perforateur et/ou burineur (1), comprenant une poignée, en particulier une poignée supplémentaire (10) selon au moins l'une quelconque des revendications précédentes.
EP09710153A 2008-02-15 2009-02-10 Poignée isolée des vibrations Active EP2247413B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008009488 2008-02-15
DE102009000598A DE102009000598A1 (de) 2008-02-15 2009-02-04 Schwingungsentkoppelter Handgriff
PCT/EP2009/051471 WO2009101062A1 (fr) 2008-02-15 2009-02-10 Poignée isolée des vibrations

Publications (2)

Publication Number Publication Date
EP2247413A1 EP2247413A1 (fr) 2010-11-10
EP2247413B1 true EP2247413B1 (fr) 2012-04-25

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EP09709612.7A Active EP2244862B1 (fr) 2008-02-15 2009-02-10 Poignée isolée des vibrations
EP09710153A Active EP2247413B1 (fr) 2008-02-15 2009-02-10 Poignée isolée des vibrations

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AT (1) ATE554886T1 (fr)
DE (2) DE102009000595A1 (fr)
WO (2) WO2009101062A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP5184223B2 (ja) * 2008-06-17 2013-04-17 株式会社マキタ 補助ハンドル
GB0904275D0 (en) 2009-03-12 2009-04-22 Black & Decker Inc Hammer with dampened handle
GB201011978D0 (en) * 2010-07-15 2010-09-01 Black & Decker Inc Side handle
EP2532485B1 (fr) * 2011-06-07 2017-11-01 Black & Decker Inc. Dispositif de montage pour monter une poignée à un outil motorisé
EP2532484B1 (fr) 2011-06-07 2017-01-11 Black & Decker Inc. Assemblage de poignée pour outil électrique
EP2803450A1 (fr) * 2013-05-16 2014-11-19 HILTI Aktiengesellschaft Poignée supplémentaire
JP5997660B2 (ja) 2013-05-29 2016-09-28 株式会社マキタ 補助ハンドルおよび補助ハンドルを備えた往復動式作業工具
CN105345753B (zh) * 2014-08-19 2018-12-28 博世电动工具（中国）有限公司 辅助把手以及手持式电动工具
CN106758899B (zh) * 2016-12-27 2022-09-20 中国铁道科学研究院节能环保劳卫研究所 铁路金属声屏障的下部解耦器
DE102018121740A1 (de) 2018-09-06 2020-03-12 Vorwerk & Co. Interholding Gmbh Handgeführtes Elektrogerät mit einem verlagerbaren Handgriff
CN216442260U (zh) 2019-06-12 2022-05-06 米沃奇电动工具公司 电动工具
WO2022204118A1 (fr) 2021-03-25 2022-09-29 Milwaukee Electric Tool Corporation Poignée latérale pour outil électrique

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DE10130548B4 (de) * 2001-06-25 2008-01-03 Robert Bosch Gmbh Zusatzhandgriff
EP1400317B2 (fr) 2002-09-19 2014-03-05 AEG Electric Tools GmbH Poignée auxiliaire
US7252156B2 (en) * 2005-03-31 2007-08-07 Makita Corporation Vibration isolation handle
DE102005000202A1 (de) * 2005-12-23 2007-06-28 Hilti Ag Handgriff mit Vibrationsminderungseinrichtung

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Publication number Publication date
DE102009000595A1 (de) 2009-08-20
DE102009000598A1 (de) 2009-08-20
WO2009101061A1 (fr) 2009-08-20
ATE554886T1 (de) 2012-05-15
EP2244862A1 (fr) 2010-11-03
EP2244862B1 (fr) 2016-10-19
EP2247413A1 (fr) 2010-11-10
WO2009101062A1 (fr) 2009-08-20

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