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WO2009065681A2 - Système de poignée supplémentaire - Google Patents

Système de poignée supplémentaire Download PDF

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Publication number
WO2009065681A2
WO2009065681A2 PCT/EP2008/064092 EP2008064092W WO2009065681A2 WO 2009065681 A2 WO2009065681 A2 WO 2009065681A2 EP 2008064092 W EP2008064092 W EP 2008064092W WO 2009065681 A2 WO2009065681 A2 WO 2009065681A2
Authority
WO
WIPO (PCT)
Prior art keywords
auxiliary handle
unit
handle device
electromagnetic actuator
damping
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/EP2008/064092
Other languages
German (de)
English (en)
Other versions
WO2009065681A3 (fr
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
Priority to AT08851439T priority Critical patent/ATE538906T1/de
Priority to EP08851439A priority patent/EP2214871B1/fr
Publication of WO2009065681A2 publication Critical patent/WO2009065681A2/fr
Publication of WO2009065681A3 publication Critical patent/WO2009065681A3/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
    • B25F5/02—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
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means

Definitions

  • the invention is based on an additional handle device according to the preamble of the claim
  • the auxiliary handle device has an auxiliary handle and a damping unit.
  • the invention is based on an auxiliary handle device, in particular for a hand-held power tool, with an additional handle and a damping unit.
  • the damping unit has at least one actuator unit for setting a damping characteristic.
  • 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 a
  • auxiliary handle device Operator for the purpose of guiding a hand tool by means of the auxiliary handle device is provided and in addition next to another handle, in particular the main handle, in addition to the hand tool is attachable, wherein the auxiliary handle device is arranged laterally on the hand tool and / or mounted without tools by an operator on the power tool or can be dismantled and / or arranged in a front, near the tool area of the power tool and / or the auxiliary handle is rod-shaped.
  • an "actuator unit” should be understood to mean, in particular, a unit which is provided, on the basis of a detected oscillation characteristic of an oscillation transmitted to the auxiliary handle device, in the operation of the tradesman's workshop.
  • 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.
  • the auxiliary handle device according to the invention is basically used in conjunction with all hand tool machines that appear useful to the person skilled in the art, in which, in particular, guidance of hand tool machines by means of the additional handle is made easier for an operator. Due to its damping characteristic, the auxiliary handle device is particularly advantageous in connection with an angle grinder.
  • an “electromagnetic actuator unit” is to be understood here as an actuator unit in which a magnetic field and / or a magnetic force can be utilized for the active setting of a characteristic, the magnetic field and / or the magnetic force passing through a flow direction through a component of the electromagnetic actuator unit flowing electrical current and / or a current strength of an electrical current flowing through the component of the electromagnetic actuator unit can be generated.
  • the electromagnetic actuator unit has at least two electromagnetic actuator elements which are arranged uniformly spaced from each other in a circumferential direction, whereby an advantageous, in a circumferential direction uniform vibration damping and / or at least partial vibration isolation of an at least partial grip portion of the auxiliary handle can be achieved.
  • the electromagnetic actuator unit has at least two electromagnetic actuator elements, which are arranged at different end regions of the auxiliary handle along a main extension direction of the auxiliary handle.
  • an "end region of the auxiliary handle” in particular an area of the Additional handle to be understood, which is arranged along an axial direction or the Kleinterstre- ckungscardi at one end of the auxiliary handle area and along the axial direction an extension of preferably not more than 20% and more preferably at most 10% of a longitudinal extent of the auxiliary handle
  • a "direction of extension of the auxiliary handle” should be understood to mean a direction of extension preferably along a longitudinal direction of the auxiliary handle within the auxiliary handle device corresponds, adapted vibration damping of a grip sleeve and / or a handle portion of the auxiliary handle can be achieved and thus an effective vibration damping during operation of the power tool can be achieved.
  • At least one of the electromagnetic actuator elements at least partially comprises a coil, whereby structurally simple magnetic force and / or a magnetic field for setting and / or changing a damping characteristic can be generated.
  • the coil is intended to generate a magnetic field.
  • At least one of the electromagnetic actuator elements to a movable core can be advantageous at least partially decoupled vibration.
  • the movable core may be formed by a permanent magnet, by a ferromagnetic material and / or further, the expert appears useful as materials.
  • Particularly advantageous here is the movable core of the electromagnetic actuator element at least partially within the
  • the electromagnetic actuator unit at least one spring element to an at least partial support, whereby the coil and / or particularly advantageous the movable core can be supported in an advantageous rest position against a vibration of the auxiliary handle or before a compensating movement to the vibration of the auxiliary handle.
  • the spring element can couple directly to the coil and / or the movable core and / or indirectly cause a support.
  • the damping unit has a sensor unit for detecting a vibration characteristic, whereby advantageously an effective adaptation of a damping characteristic of the damping unit, in particular the electromagnetic actuator, to a current vibration behavior of the power tool and / or the auxiliary handle device can be achieved.
  • the vibration characteristic variable can be detected in a structurally simple and, in particular, cost-effective manner.
  • the distance sensor is formed by a capacitive distance sensor having two mutually insulated, electrically chargeable components and / or elements, wherein a distance or a distance between the two components and / or elements can be determined by means of a capacitance.
  • other distance sensors which appear reasonable to the person skilled in the art, for example distance sensors which determine a distance by a transit time of a signal, are also conceivable at any time in an alternative embodiment of the invention.
  • the sensor unit has at least two sensor elements which are arranged on different regions of the auxiliary handle along a main direction of extension of the auxiliary handle, advantageously a changing vibration behavior along the main extension direction or along a preferred direction of vibration propagation within the auxiliary handle can be detected.
  • a vibration behavior of the auxiliary handle can be determined particularly accurately when the sensor unit has at least two sensor elements which are arranged uniformly spaced from one another in a circumferential direction.
  • the damping unit has a control unit which is provided for setting a damping characteristic as a function of a sensed oscillation characteristic, whereby a particularly automatic adjustment of the damping characteristic can be achieved.
  • a "control unit” should be understood to mean, in particular, a unit that is part of a computing unit, an evaluation unit, a control unit, and a control unit. is formed control unit and / or a control unit, wherein a control unit can be formed both by a processor alone and in particular by a processor and other electronic components, such as storage means.
  • the control unit and the sensor unit are at least partially formed in one piece.
  • the damping unit has at least one energy storage device which is provided for supplying energy to the control unit and / or the electromagnetic actuator unit and / or the sensor unit, operation of the damping unit can be achieved independently of a power supply of the handheld power tool.
  • the energy storage device can advantageously be formed by a rechargeable energy storage device. In principle, it is also conceivable to supply the control unit and / or the electromagnetic actuator unit with electrical energy via the handheld power tool.
  • the auxiliary handle has at least one support element which is provided for receiving the energy storage means. It can thereby be achieved a particularly compact and space-saving arrangement of the energy storage means within the auxiliary handle device or within the damping unit.
  • the support element is formed by an element which extends along the main direction of extension of the auxiliary handle and gives the auxiliary handle along the main direction of extension for a guidance of the power tool by means of the auxiliary handle required rigidity and stability.
  • the auxiliary handle has a grip sleeve, which forms a receiving area for at least partially receiving the damping unit, whereby a structurally simple recording and a compact, especially space-saving arrangement of
  • Damping unit can be achieved within the auxiliary handle device.
  • FIG. 1 shows a hand tool with a erfmdungswashen additional handle device in a schematic representation
  • FIG. 2 shows the auxiliary handle device with a damping unit in a perspective sectional view
  • FIG. 3 shows the auxiliary handle device from FIG. 2 in a sectional view.
  • FIG. 1 shows a hand-held power tool 12 formed by an angle grinder in a view from above.
  • the hand-held power tool 12 comprises a housing 68 and a main handle 66 integrated in the housing 68.
  • the main handle 66 extends on a side 72 facing away from a tool 70 formed by a cutting disk in the direction of a longitudinal direction 74 of the hand-held power tool 12.
  • an auxiliary handle device 10 is arranged, which extends transversely to the longitudinal direction 74 of the power tool 12.
  • FIG. 2 shows the auxiliary handle device 10 with an additional handle 14, a damping unit 16 and a fastening unit 78.
  • the fastening unit 78 is provided for attachment of the auxiliary handle device 10 with the hand tool 12 and has for this purpose a bolt-shaped fastening element 80 to a screw connection with the power tool 12 on.
  • the damping unit 16 comprises an actuator unit 18 formed by an electromagnetic actuator unit 18 for setting a damping characteristic and a sensor unit 46 for detecting a vibration characteristic.
  • the auxiliary handle 14 has a grip sleeve 62 which, with a surface 84 facing inward in the radial direction 82, comprises a receiving region 64 of the auxiliary handle 14, in which the damping unit 16 is arranged.
  • the electromagnetic actuator unit 18 has six electromagnetic actuator elements 20, 22, 24, 26, 28, 30, each comprising a coil 40 and a coil 40 movably mounted core 42 include.
  • the electromagnetic actuator elements 20, 22, 24, 26, 28, 30 are each two Grappen of three electromagnetic actuator elements 20, 22, 24, 26, 28, 30, wherein a first group of electromagnetic actuator elements 20, 22, 24 at one along a main extension direction 38 of the auxiliary handle 14 of the fastening unit 78 facing end portion 34 of the auxiliary handle 14th and a second group of electromagnetic actuator elements 26, 28, 30 is arranged on an end region 36 of the auxiliary handle 14 facing away from the main extension direction 38 of the fastening unit 78.
  • the electromagnetic actuator elements 20, 22, 24, 26, 28, 30 of the first and the second group are also arranged in a circumferential direction 32 evenly spaced apart on a Stützele- element 60 of the auxiliary handle 14.
  • the support element 60 is designed in two parts, wherein a portion 86 of the support element 60 facing the attachment unit 78 is formed integrally with the attachment element 80 of the attachment unit 78.
  • both partial regions 86, 88 of the support element 60 are connected to one another in a middle region 90 of the auxiliary handle 14, for example screwed together by means of a thread, not shown.
  • the core 42 of the electromagnetic actuator elements 20, 22, 24, 26, 28, 30 is in each case arranged on the surface 84 of the grip sleeve 62 which faces inward in the radial direction 82 and extends inwards in the radial direction 82.
  • the core 42 is in the radial direction 82 via a spring element 44 formed by a helical spring which bears against the support element
  • the coils 40 are each arranged on the support element 60, wherein the coils 40 surround the spring elements 44 and the spring elements 44 are arranged within a region 92 encompassed by the coils 40.
  • each one of the coils 40 facing portion 94 of the core 42 is mounted within the area encompassed by the coil 40 area 92 so that the cores 42 during operation of the power tool 12, a magnetic force acts, depending on the direction and / or strength of an in The magnetic field generated by the coils 40, the cores 42 in the radial direction 82 to the outside or against a spring force of the spring element 44 moves inwardly (Figure 3).
  • the electromagnetic actuator elements 20, 22, 24, 26, 28, 30 or the cores 42 by means of the spring elements 44 in a central rest position before operation of the power tool 12 and the auxiliary handle device 10 are held.
  • the grip sleeve 62 of the auxiliary handle 14 is exclusively by means of the electromagnetic actuator elements 20, 22, 24, 26, 28, 30 with respect to the fastening unit 78 or in relation to the Support member 60 mounted so that a direct vibration transmission from the fastening unit 78 on the support member 60 to the grip sleeve 62 during operation of the power tool 12 is prevented.
  • the sensor unit 46 also has six sensor elements 48, 50, 52, 54, of which only four can be seen in FIG. 2, each of which is formed by a capacitive distance sensor. In each case three of the sensor elements 48, 50, 52, 54 are arranged to form a group, wherein a first group of sensor elements 48, 50 is arranged in a region 96 facing the main extension direction 38 of the fastening unit 78 and a second group of sensor elements 52, 54 facing away in a main extension direction 38 of the fastening unit 78
  • Region 98 of the auxiliary handle 14 is arranged.
  • the sensor elements 48, 50, 52, 54 of a group are arranged in the circumferential direction 32 in each case at a distance from one another. Furthermore, the sensor elements 48, 50, 52, 54 each have a first sensor area 100 and a second sensor area 102.
  • the first sensor region 100 is arranged on the support element 60 and the second sensor region 102 is arranged on the inwardly facing surface 84 of the grip sleeve 62, wherein the two sensor regions 100, 102 are arranged spaced apart in the radial direction 82.
  • the two sensor regions 100, 102 form a capacitor, so that by means of a capacitance during operation of the handheld power tool 12 or the auxiliary handle device 10 a vibration characteristic based on a distance 104 and the changing distance 104 in the radial Direction 82 between the support element
  • the damping unit 16 furthermore has a control unit 56, which is provided for setting a damping characteristic within the electromagnetic actuator unit 18 or the electromagnetic actuator elements 20, 22, 24, 26, 28, 30 as a function of the sensed oscillation characteristic.
  • a control unit 56 which is provided for setting a damping characteristic within the electromagnetic actuator unit 18 or the electromagnetic actuator elements 20, 22, 24, 26, 28, 30 as a function of the sensed oscillation characteristic.
  • sensed vibration characteristics of the sensor unit 46 or of the individual sensor elements 48, 50, 52, 54 are conducted via a data line, not shown, to the control unit 56, which determines a damping characteristic from the sensed vibration characteristics by means of a processor of the control unit 56, not shown
  • a respective damping characteristic is determined in each case.
  • damping is set in the electromagnetic actuator unit 18 or in the individual electromagnetic actuator elements 20, 22, 22, 24, 26, 28, 30.
  • a vibration movement which in operation of the power tool 12 via the fastening unit 78 is transmitted to the auxiliary handle 14, damped by means of a compensating movement of the electromagnetic actuator elements 20, 22, 22, 24, 26, 28, 30.
  • a magnetic field is generated which acts on the movable cores 42 against a momentary oscillatory movement in the radial direction 82, so that the grip sleeve 62 is at least partially vibration-decoupled with respect to the fastening unit 78 or the support element
  • an energy storage means 58 which supplies the control unit 56, the sensor unit 46 and the electromagnetic actuator unit 18 with electrical energy via an energy transmission line not shown.
  • the energy storage means 58 which is formed, for example, by a battery storing electrical energy in the form of chemical energy, is arranged inside the support element 60.
  • the support element 60 has a recess 106 in the central region 90 along the main extension direction 38, wherein the recess 106 comprises a receiving region 108 for receiving the energy storage device 58.
  • the two-part design makes it possible for an operator of the auxiliary handle device 10 to replace the energy storage means 58 by removing the portion 88 of the support element 60 facing away from the attachment unit 78. In principle, however, it is also conceivable that the energy storage means 58 via a power transmission line, not shown via a power supply of the power tool 12 during operation is rechargeable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention concerne un système de poignée supplémentaire, en particulier pour une machine-outil portative (12), comprenant une poignée supplémentaire (14) et une unité d'amortissement (16). Selon l'invention, l'unité d'amortissement (16) comprend au moins une unité d'actionnement (18) permettant le réglage d'une grandeur caractéristique d'amortissement.
PCT/EP2008/064092 2007-11-21 2008-10-20 Système de poignée supplémentaire Ceased WO2009065681A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT08851439T ATE538906T1 (de) 2007-11-21 2008-10-20 Zusatzhandgriffvorrichtung
EP08851439A EP2214871B1 (fr) 2007-11-21 2008-10-20 Système de poignée supplémentaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007055634A DE102007055634A1 (de) 2007-11-21 2007-11-21 Zusatzhandgriffvorrichtung
DE102007055634.0 2007-11-21

Publications (2)

Publication Number Publication Date
WO2009065681A2 true WO2009065681A2 (fr) 2009-05-28
WO2009065681A3 WO2009065681A3 (fr) 2009-12-03

Family

ID=40219023

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/064092 Ceased WO2009065681A2 (fr) 2007-11-21 2008-10-20 Système de poignée supplémentaire

Country Status (4)

Country Link
EP (1) EP2214871B1 (fr)
AT (1) ATE538906T1 (fr)
DE (1) DE102007055634A1 (fr)
WO (1) WO2009065681A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230011055A1 (en) * 2019-09-06 2023-01-12 Makita Corporation Electric power tool
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool
US12434369B2 (en) 2021-05-14 2025-10-07 Techtronic Cordless Gp Handle for use with a power tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57150014A (en) * 1980-06-21 1982-09-16 Makoto Minamidate Oscillation control type handle device
DE4011124A1 (de) * 1990-04-06 1991-10-10 Metabowerke Kg Vibrationsgedaempfter handgriff
DE19646622B4 (de) * 1996-11-12 2004-07-01 Wacker Construction Equipment Ag An einem Handgriff führbares Arbeitsgerät
DE10130088C2 (de) * 2001-06-21 2003-10-16 Hilti Ag Schlagendes Elektrohandwerkzeuggerät mit aktiver Vibrationsdämpfung
DE10361481B4 (de) * 2003-07-22 2006-08-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Modulare Schnittstelle zum Dämpfen mechanischer Schwingungen
DE102005031074A1 (de) * 2005-06-24 2007-01-04 C. & E. Fein Gmbh Kraftgetriebenes Handwerkzeug mit Dämpfungseinrichtung
DE102005000202A1 (de) * 2005-12-23 2007-06-28 Hilti Ag Handgriff mit Vibrationsminderungseinrichtung

Cited By (4)

* 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
US20230011055A1 (en) * 2019-09-06 2023-01-12 Makita Corporation Electric power tool
US12030170B2 (en) * 2019-09-06 2024-07-09 Makita Corporation Electric 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
EP2214871A2 (fr) 2010-08-11
DE102007055634A1 (de) 2009-05-28
EP2214871B1 (fr) 2011-12-28
WO2009065681A3 (fr) 2009-12-03
ATE538906T1 (de) 2012-01-15

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