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.
• a vibration-decoupled auxiliary handle designed as an ironing 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.
• a particularly compact embodiment of a damping device is the
• Damper disposed between an inner circumferential surface of the connecting element and an outer circumferential 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 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 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. In order to effectively damp vibrations, the elastic deflection is preferably desired in this printing direction.
• the hand tool is lifted by the operator from the workpiece. For this purpose, 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.
• Removing the power tool from the workpiece as low as possible to spend forces is preferably to ensure that 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, in particular an additional handle according to the invention provides a
• Fixing device for releasably fixing the handle to a machine housing of the power tool before.
• 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
• the actuating element is designed substantially as a clamping nut.
• Fig. 1 is a perspective view of a hammer drill with an additional handle according to the invention
• Fig. 2 is a side view of a first embodiment of an additional handle according to the invention
• 3a and 3c each show a side view of a second or third embodiment of an auxiliary handle according to FIG. 2 with a first or second restriction means for limiting the elastic deflection from the rest position of the grip region
• 3b and 3d each show a detailed view of the first and second restriction means in the direction B-B
• FIG. 4 shows a sectional view along the line A-A according to FIG. 2 of the connection region of a fourth exemplary embodiment with a damping device comprising an air spring
• Fig. 5 is a sectional view taken along line A-A of Fig. 2 of the connecting portion of a fifth embodiment with a damping device with a porous material and lamellar transmission means
• Fig. 1 shows a hammer drill 1 as an example of a hand tool with a machine housing 2, an inserted in a tool holder 3 insert tool 4, which defines a machine axis 5, and a, in a front portion 6 of
• Machine housing 2 as an additional handle 10 trained inventive handle.
• FIG. 2 shows a first exemplary embodiment of a handle designed as an auxiliary handle 10, as used in FIG. 1, in a lateral sectional view with a fastening element 12 and a grip element 14.
• the fastening element 12 has two partial 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 area 19a, 19b of a partial element 12a, 12b as a radial enclosing area of the fastening element 12.
• the radial enclosure in the end regions 16a, 16b is best seen in FIG.
• the auxiliary handle 10 further includes 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. In each of these radial spaces 26a, 26b, a damping device 28a, 28b is provided.
• 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.
• the contact disks 37 are formed on the fastening sleeves 24a, 24b, in particular in each case in one piece with them.
• 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. In his cocking area
• 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 cooperate with the toothings 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 pivoting 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.
• loosening the clamping screw 30 can by turning the auxiliary handle 10 in a circumferential direction of the clamping band 40 a
• Circumferential position of the auxiliary handle 10 are changed relative to the machine housing. By tightening the clamping nut 30, 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 for improving the damping properties and the user comfort partially or completely with a - o -
• elastic material in particular an elastomer and / or a porous foam and / or an elastic fabric.
• FIGS. 3 a to 3 d show two further developments of the auxiliary handle from FIG. 2.
• 3a and 3b show a second embodiment
• FIGS. 3c and 3d show a third embodiment of an auxiliary handle 10 in which a range of action of the damping devices 28a, 28b is limited to a range of motion, in particular an angle 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 auxiliary handle 10, the handle element 14 of which at its end portions 16a, 16b oriented towards the fastening element 12, parallel to a handle portion 52 of the handle member 14 inwardly oriented, wedge-shaped stop projections 54a, 54b has.
• 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 can be seen particularly well in Fig. 3b, which shows a sectional view along the line B - B of Fig. 3a.
• 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 surfaces 60a, 61a, 60b, 61b extending parallel to the pivot axis 48, which interact with the respective contact surfaces 58a, 59a, 58b, 59b such 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.
• a 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 in one by the operator - -
• Pressure direction RD on the handle member 14 loaded which is determined by a pressing of the insert tool against the workpiece.
• vibrations in the machine housing which can be transmitted to the handle, occur 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.
• 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.
• Has the tool wedged in working condition, jammed or the like, are in the transition state sometimes considerable tensile forces in the pulling direction apply.
• 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 arranged 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.
• 3c and 3d show another embodiment of an additional handle 10 with 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 as
• 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 can be seen particularly well in Fig. 3d. Analogous to the embodiment from FIG.
• abutment surfaces 58a ', 59a', 58b ', 59b' and at the abutment recesses 56a ', 56b' are abutment surfaces 60a ', 61a', 60b ', 61b' on the abutment extensions 54a ', 54b'.
• 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 abutment surface 61a ' are also formed here.
• '61b' formed such that in the printing direction RD on the handle member, a greater elastic deflection can be made from the rest position as in the direction of pull RZ on the handle element.
• 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. 4 shows a fourth exemplary embodiment of an end region 16 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 of Fig. 2.
• the predominantly hollow cylindrical connecting element 18 is provided at the end portion 16 of the handle member 14.
• the connecting element 18 encloses the
• 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 outward directed radial extensions 110.
• the angle WL in the rest position is approximately 45 °.
• an existing, an elastic material air spring 114 is also provided in the intermediate space 108.
• 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 analogously to the radial extensions, 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 In the intermediate spaces between the receiving grooves 116, 118, 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.
• the radial extensions 110, 112 shown in FIG. 4 are also suitable in combination with a porous material 100 for the production of a damping device 28, as shown in FIG.
• This embodiment variant can be considered as a fifth embodiment.
• the mode of action is analogous to the action of the air spring 114 of FIG. 4. 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.
• Inventive damping devices 28 according to one of the examples of FIGS. 4 and 5 are not fixed 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 inventive concept.
• a combination of a spring element 66 with a damping material appears to be an advantageous further development.

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

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• 2009
  • 2009-02-04 DE DE102009000595A patent/DE102009000595A1/de not_active Withdrawn
  • 2009-02-04 DE DE102009000598A patent/DE102009000598A1/de not_active Ceased
  • 2009-02-10 WO PCT/EP2009/051471 patent/WO2009101062A1/fr active Application Filing
  • 2009-02-10 WO PCT/EP2009/051470 patent/WO2009101061A1/fr active Application Filing
  • 2009-02-10 EP EP09709612.7A patent/EP2244862B1/fr active Active
  • 2009-02-10 AT AT09710153T patent/ATE554886T1/de active
  • 2009-02-10 EP EP09710153A patent/EP2247413B1/fr active Active

Non-Patent Citations (1)

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