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WO2009083303A1 - Système de poignée auxiliaire - Google Patents

Système de poignée auxiliaire Download PDF

Info

Publication number
WO2009083303A1
WO2009083303A1 PCT/EP2008/064812 EP2008064812W WO2009083303A1 WO 2009083303 A1 WO2009083303 A1 WO 2009083303A1 EP 2008064812 W EP2008064812 W EP 2008064812W WO 2009083303 A1 WO2009083303 A1 WO 2009083303A1
Authority
WO
WIPO (PCT)
Prior art keywords
damping
auxiliary handle
handle device
unit
partially
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.)
Ceased
Application number
PCT/EP2008/064812
Other languages
German (de)
English (en)
Inventor
Roswitha Eicher
Stefan Heess
Joerg Maute
Florian Esenwein
Bernhard Eicher
Marcus Schuller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2009083303A1 publication Critical patent/WO2009083303A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

Definitions

  • the invention is based on an additional handle device according to the preamble of claim 1.
  • the auxiliary handle device has an additional handle and a vibration damping to a damping unit with a damping means.
  • the invention is based on an auxiliary handle device, in particular for a hand-held power tool, with an auxiliary handle and a damping unit which has at least one damping means for vibration damping.
  • the auxiliary handle and / or the damping unit have a component with a contact surface against which the damping means bears and performs a frictional movement on the contact surface of the component for vibration damping.
  • an "additional handle” is an area and / or a component and / or an element to be understood, the or to a donning, in particular a grasping, by a hand or several hands of an operator, for the purpose of guiding a hand tool by means of the auxiliary handle device, is provided and in particular next to another Handle, in particular the main handle, in addition to the hand tool machine is attachable, wherein the auxiliary handle device is arranged laterally on the hand tool and / or tool without tools mounted or dismounted by an operator on the hand tool and / or in a front, near the tool area of the hand tool ne is arranged and / or the auxiliary handle is bar-shaped.
  • the embodiment according to the invention makes it possible to achieve an advantageous damping of the auxiliary handle, in particular of a grip area, and thus a high level of operating comfort for an operator.
  • a vibration damping takes place within the damping unit due to a friction between abutting and mutually movable surfaces of the damping means and the component of the damping unit and / or the auxiliary handle during vibration damping or vibration energy of a transmitted to the auxiliary handle device during operation of the power tool vibration is from absorbs the damping unit and at least partially converted into a friction energy.
  • the component is particularly advantageously formed by a further damping means of the damping unit, so that the damping unit has at least two damping means with at least partially abutting surfaces which are designed to perform a movement relative to one another during the vibration damping.
  • the surfaces of the damping means are at least partially formed by the contact surfaces and in particular by a respective sliding surface, whereby the damping means are advantageously matched to a vibration behavior of the hand-held power tool Damping property or a coefficient of friction matched to the vibration behavior and / or advantageous vibration damping along a preferred direction, in particular along a preferred direction along a vibration transmission and / or a vibration propagation within the auxiliary handle, can be achieved
  • the damping means are advantageously matched to a vibration behavior of the hand-held power tool Damping property or a coefficient of friction matched to the vibration behavior and / or advantageous vibration damping along a preferred direction, in particular along a preferred direction along a vibration transmission and / or a vibration propagation within the auxiliary handle, can be achieved
  • the auxiliary handle device is particularly advantageous in connection with an angle grinder.
  • the at least two damping means are arranged one after the other along an axial direction of the auxiliary handle, whereby a vibration damping or absorption of a vibration energy along a preferred direction of vibration propagation, which runs essentially parallel to the axial direction, within the accessory.
  • set handle device in particular structurally simple can be achieved.
  • an "axial direction” should in particular be understood to mean a direction along a longitudinal extent of the auxiliary handle device.
  • the damping means is at least partially formed by a cup-shaped sliding body, whereby advantageously a friction between a plurality of damping means, in particular successively arranged damping means, structurally simple can be realized.
  • the term "cup-shaped” is understood in particular to mean that a component and / or a body is curved along at least one extension surface and preferably the entire component and / or the entire body is formed along a curved surface
  • the cup-shaped sliding body formed by a spherical shell-shaped sliding body, whereby a uniform force distribution within the slider achieved and thus a particularly effective, a vibration movement compensating vibration damping can be achieved within the damping unit.
  • a "spring element” should be understood to mean, in particular, an element which has a special shape that forms part of a receptacle or a receptacle
  • the spring element is preferably formed by a leaf spring or particularly advantageously by a plate spring.
  • the damping means can also be formed by further elements that appear appropriate to the person skilled in the art.
  • an "elastic sheath” should be understood to mean, in particular, an envelope formed of an elastic material which changes its shape under the action of force, in particular an external force, and when the acting force is released into its original shape due to an internal force, preferably counteracts the external force acting on the elastic sheath, back around. If the elastic sheathing is applied to a surface of the damping means by means of an injection process, a structurally simple assembly of the elastic sheathing on the damping means can also be achieved.
  • the elastic sheath is at least partially formed integrally with the grip sleeve, whereby further components, space, installation costs and costs can be saved particularly advantageous.
  • integral is to be understood in particular as one-piece and / or formed from a cast and / or designed as a component.
  • the auxiliary handle has a grip sleeve which at least partially surrounds a receiving area for receiving the damping unit.
  • the damping unit has at least one support element which extends along an axial direction through the receiving area, whereby a stiffness of the auxiliary handle structurally simple and thus an advantageous, in particular exact guidance of the power tool by means of the auxiliary handle device for an operator can be achieved can.
  • the support element can be designed in a particularly advantageous bolt-shaped manner or be formed by a cable and / or formed by further elements that appear appropriate to the person skilled in the art.
  • damping means is at least partially arranged in a circumferential direction about the support element, an advantageous in a circumferential direction at least partially uniform
  • Vibration damping can be easily achieved structurally.
  • the damping unit has at least one setting unit which is provided for setting at least one damping parameter of at least one damping means.
  • the setting unit is to a setting of a damping parameter provided for an operator of the power tool or the auxiliary handle device.
  • a particularly structurally simple adjustment of a damping parameter can be achieved if the setting unit has at least one adjusting element which is provided for
  • At least one adjusting element is particularly advantageously formed at least partially by an end region of the auxiliary handle.
  • an "end region of the auxiliary handle” should be understood to mean, in particular, a region of the auxiliary handle which is arranged along an axial direction or a longitudinal extent on an area facing an end of the auxiliary handle and which has an extent of preferably not more than 20% along the axial direction particularly advantageously comprises a maximum of 10% of the longitudinal extension of the auxiliary handle.
  • the adjusting element is at least partially formed integrally with the support element, whereby further components, space, installation costs and costs can be advantageously saved.
  • the damping unit has at least one return element, which is provided to move the damping means back to a rest position.
  • the damping means can be moved back to a vibration damping or after operation of the power tool in an advantageous starting position against further vibration damping.
  • the return element is preferably formed by a spring element, such as particularly advantageously by a helical spring, and / or further return elements that appear appropriate to the person skilled in the art.
  • FIG. 1 shows a handheld power tool with an auxiliary handle device according to the invention in a schematic representation
  • FIG. 2 shows the auxiliary handle device with a plurality of disk springs
  • FIG. 3 shows the additional handle device with an alternative embodiment of the damping unit to FIG. 2 in a perspective sectional view.
  • FIG. 1 shows a hand-held power tool 12a designed by a winch grinding machine in a view from above.
  • the hand tool 12a comprises a housing 68a and a main handle 66a integrated in the housing 68a.
  • the main handle 66a extends on a side facing away from a tool 70a formed by a cutting tool 70a in the direction of a longitudinal direction 74a of the power tool 12a.
  • An auxiliary handle device 10a which extends transversely to the longitudinal direction 74a of the handheld power tool 12a, is arranged on a front, tool-near region 76a of the handheld power tool 12a.
  • the auxiliary handle device 10a is shown in a sectional view.
  • the auxiliary handle device 10a has an auxiliary handle 14a, a fastening unit 78a and a damping unit 16a.
  • the fastening unit 78a is provided for fastening the auxiliary handle device 10a to the handheld power tool 12a and for this purpose has a bolt-shaped fastening element 80a which extends away from the auxiliary handle 14a along an axial direction 30a, 32a of the auxiliary handle 14a.
  • the axial direction 30a, 32a extends parallel to a longitudinal extension 82a of the auxiliary handle 14a.
  • the auxiliary handle 14a has a grip sleeve 44a which, with a surface 86a which faces inward in a radial direction 84a, forms a receiving region 46a, which is partially provided for receiving the damping unit 16a.
  • the auxiliary handle 14a has two end regions 60a, 88a, which extend along the axial direction 30a, 32a at an end 90a facing the fastening unit 78a and at an end 92a of the grip sleeve 44a facing away from the fastening unit 78a are arranged.
  • the two end regions 60a, 88a define or enclose together with the grip sleeve 44a the receiving region 46a.
  • the damping unit 16a has a plurality of damping means 18a, 20a which abut against a contact surface 94a, 96a of a further component 22a, 24a of the damping unit 16a, wherein the further
  • Component 22a, 24a is formed in each case by one of the damping means 18a, 20a of the damping unit 16a.
  • the damping means 18a, 20a each have a surface 26a, 28a which is formed by the contact surfaces 94a, 96a and against which the damping means 18a, 20a abut each other.
  • the damping means 18a, 20a are provided to perform a friction movement on the contact surface 94a, 96a of the further component 22a, 24a or on the adjacent damping means 18a, 20a or the damping means 18a, 20a perform a movement to each other, so that during operation of the handheld power tool 12a vibration damping or absorption of a vibration energy within the auxiliary handle device 10a can take place by conversion into frictional energy between the individual damping means 18a, 20a and their abutting surfaces 26a, 28a.
  • the abutting surfaces 26a, 28a of the damping means 18a, 20a are formed by sliding surfaces, wherein the sliding surfaces can additionally be provided with a special surface layer, which can have a friction coefficient matched to a specific operating mode and / or machining mode of the hand tool 12a.
  • the damping means 18a, 20a are each formed by a spring element 38a, 40a formed by a plate spring.
  • the disc springs are arranged successively along the axial direction 30a, 32a adjacent to each other.
  • the plate springs are arranged in series, wherein a convex surface shape of a first disc spring rests against a convex surface shape of a second plate spring and a concave surface shape of the first plate spring rests against a concave surface shape of another disc spring.
  • the damping unit 16a has a support element 48a which extends along the axial direction 30a, 32a through the receiving region 46a of the auxiliary handle 14a.
  • the support element 48a is bolt-shaped and formed integrally with the fastening element 80a of the fastening unit 78a, wherein a cross-sectional area 98a of the support element 48a is smaller than a cross-sectional area 100a of the fastening element 80a, such that movement of the disk springs relative to one another during operation of the handheld power tool 12a or to a swing Damping is possible.
  • the support element 48a is arranged in a central region 102a of the receiving region 46a.
  • the disk springs are each arranged in a circumferential direction 50a of the auxiliary handle 14a, which runs essentially perpendicular to the axial direction 30a, 32a, around the support element 48a.
  • vibrations and / or vibrations are transmitted to the auxiliary handle device 10a, wherein by means of the damping unit 16a and the damping means 18a, 20a, a vibration damping takes place.
  • the damping means 18a, 20a of the damping unit 16a along a direction of vibration propagation within the auxiliary handle device 10a arranged in front of the grip sleeve 44a, so that an advantageous at least partial vibration isolation of the grip sleeve 44a can be realized during operation of the power tool 12a and thus a high Ease of use for one operator.
  • the vibrations and / or vibrations propagate within the auxiliary handle device 10a along a preferential direction that substantially corresponds to the axial direction 30a, 32a, wherein the damping means 18a, 20a are provided with a vibration damping
  • the damping unit 16a has an elastic sheath 42a formed by an elastomer, which surrounds the damping means 18a, 20a formed by disc springs in the radial direction 84a to the outside and so can be done to the disc springs additional vibration damping during operation of the power tool 12a.
  • the elastic jacket 42a is also integrally formed with the grip sleeve 44a of the auxiliary handle 14a, so that an advantageous vibration decoupling of the grip sleeve 44a, in particular a grip portion of the grip sleeve 44a, is achieved during operation.
  • the damping unit 16a has an adjustment unit 52a, which is provided for setting a damping parameter of the damping means 18a, 20a.
  • the adjusting unit 52a has an adjusting element 54a, which is formed integrally with the supporting element 48a and an adjustment member 56a formed from the end portion 60a facing away from the attachment unit 78a.
  • the adjusting element 54a or the supporting element 48a has a threading for adjusting the damping parameter at an end region 108a facing away from the fastening unit 78a, by means of which the support element 48a with the adjustment element 56a or the end region 60a of the auxiliary handle 14a facing away from the fastening unit 78a, for this purpose a
  • Recess 110a having a corresponding to the thread of the support member 48a thread can be screwed.
  • an operator can vary a longitudinal extension 112a of the receiving region 46a and thus also set a damping parameter of the damping means 18a, 20a or the damping unit 16a.
  • damping means 18a, 20a are arranged interchangeable within the auxiliary handle device 10a together with the grip sleeve 44a or the elastic sheath 42a.
  • an operator can, depending on a field of application of the power tool 12a corresponding or with a to the
  • FIG. 3 shows an alternative embodiment. Substantially identical components, features and functions are basically numbered by the same reference numerals. In order to distinguish the exemplary embodiments, however, the letters a and b are added to the reference symbols of the exemplary embodiments. The following description is limited in
  • FIG. 3 shows an auxiliary handle device 10b with an additional handle 14b and a damping unit 16b.
  • the damping unit 16b has a plurality of damping means 18b, 20b, which are subdivided into two groups, wherein a material, in particular a friction coefficient, of the damping means 18b of a group differs in each case from one material, in particular a friction coefficient, from the damping means 20b of the other group.
  • the damping means 18b, 20b are formed of a same material and / or the damping means 18b, 20b of a group additionally have a surface coating.
  • the damping means 18b, 20b are each formed by a ball-shell-shaped sliding body 34b, 36b and successively adjacent to one another along an axial direction 30b, 32b of the auxiliary handle 14b, wherein the damping means 18b, 20b of the different groups are arranged alternately along the axial direction 30b, 32b ,
  • the damping means 18b, 20b are arranged adjacent to one another within a receiving region 46b surrounded by a grip sleeve 44b, wherein the damping means 18b, 20b have surfaces 26b, 28b or contact surfaces 94b, 96b abutting one another for vibration damping.
  • the contact surfaces 94b, 96b of the damping means 18b, 20b are aligned obliquely with respect to a radial direction 84b, wherein the contact surfaces 94b, 96b with the radial direction 84b form an angle which is preferably less than 45 ° and particularly advantageously less than 30 ° ,
  • the damping unit 16b has a setting unit 52b, which leads to an adjustment of a
  • the setting unit 52b has an adjusting element 58b, which is formed by an end 114b of the grip sleeve 44b facing away from a fastening unit 78b and comprises a thread on a radially inwardly facing surface 86b.
  • a further adjustment element 56b of the adjustment unit 52b is formed by an end region 60b facing away from the attachment unit 78b, which is connected to the thread of the
  • Adjusting element 56b has corresponding thread.
  • a longitudinal extent 112b of the receiving region 46b can thus be varied, and thus an attenuation parameter of the damping means 18b, 20b can be advantageously adapted by the operator to a vibration behavior of the handheld power tool 12b.
  • an alignment of the damping means 18b, 20b with respect to the axial direction 30b, 32b and the radial direction 84b is also changed.
  • the damping unit 16b has a return element 62b formed by a spring element 64b, which is provided to move the damping means 18b, 20b back into an initial position.
  • the spring element 64b is formed by a prestressed coil spring and arranged in a circumferential direction 50b about a support element 48b of the damping unit 16b.
  • the spring element 64b is on one of
  • the cylindrical recess 120b of the support member 48b extends perpendicularly to the axial direction 30b, 32b of the auxiliary handle 14b.
  • the spring element 64b is connected to the end region 60b of the auxiliary handle 14b facing away from the fastening unit 78b at an end 122b facing away from the fastening unit 78b, the spring element 64b for this purpose having a further hook-shaped fastening element 124b which engages in a fastening groove 126b of the end region 60b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)

Abstract

L'invention concerne un système de poignée auxiliaire, en particulier pour une machine-outil portative (12a, 12b), avec une poignée auxiliaire (14a, 14b) et avec une unité d'amortissement (16a, 16b) qui présente au moins un élément d'amortissement (18a, 20a; 18b, 20b) pour un amortissement des vibrations. Selon l'invention, la poignée auxiliaire (14a, 14b) et/ou l'unité d'amortissement (16a, 16b) présentent un composant (22a, 24a; 22b, 24b) pourvu d'une surface d'appui (94a, 96a; 94b, 96b) contre laquelle s'applique l'élément d'amortissement (18a, 20a; 18b, 20b), ce dernier effectuant un mouvement de friction contre la surface d'appui (94a, 96a; 94b, 96b) du composant (22a, 24a; 22b, 24b) afin d'amortir les vibrations.
PCT/EP2008/064812 2007-12-27 2008-10-31 Système de poignée auxiliaire Ceased WO2009083303A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710062719 DE102007062719A1 (de) 2007-12-27 2007-12-27 Zusatzhandgriffvorrichtung
DE102007062719.1 2007-12-27

Publications (1)

Publication Number Publication Date
WO2009083303A1 true WO2009083303A1 (fr) 2009-07-09

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ID=40248055

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/064812 Ceased WO2009083303A1 (fr) 2007-12-27 2008-10-31 Système de poignée auxiliaire

Country Status (2)

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DE (1) DE102007062719A1 (fr)
WO (1) WO2009083303A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240165782A1 (en) * 2021-05-14 2024-05-23 Techtronic Cordless Gp A handle for use with a power tool
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156387A2 (fr) * 1984-03-30 1985-10-02 Makoto Minamidate Poignée anti-vibrations

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156387A2 (fr) * 1984-03-30 1985-10-02 Makoto Minamidate Poignée anti-vibrations

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool
US20240165782A1 (en) * 2021-05-14 2024-05-23 Techtronic Cordless Gp A handle for use with a power tool
US12434369B2 (en) * 2021-05-14 2025-10-07 Techtronic Cordless Gp Handle for use with a power tool

Also Published As

Publication number Publication date
DE102007062719A1 (de) 2009-07-02

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