EP2018249A1 - Machine-outil portative avec une poignée amortissant les vibrations - Google Patents

Machine-outil portative avec une poignée amortissant les vibrations

Info

Publication number
EP2018249A1
EP2018249A1 EP07727820A EP07727820A EP2018249A1 EP 2018249 A1 EP2018249 A1 EP 2018249A1 EP 07727820 A EP07727820 A EP 07727820A EP 07727820 A EP07727820 A EP 07727820A EP 2018249 A1 EP2018249 A1 EP 2018249A1
Authority
EP
European Patent Office
Prior art keywords
handle
housing
hand tool
connecting element
lever
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.)
Withdrawn
Application number
EP07727820A
Other languages
German (de)
English (en)
Inventor
Gerhard Meixner
Juergen Lennartz
Jan Koalick
Lars Schmid
Johannes Schnitzler
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 EP2018249A1 publication Critical patent/EP2018249A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • the present invention relates to a hand tool, in particular a drill and / or percussion hammer, with a
  • a machine tool of the type mentioned which has a vibration-damped, supported by springs in relation to the housing strap handle.
  • This handle has two substantially parallel legs, which are in complementary recesses of a handle end of the housing are guided linearly movable in the working direction of the machine tool.
  • the two legs are each connected to the housing via levers whose outer ends are articulated to the respective leg, while their inner ends are articulated to a lying between the two legs of the handle portion of the machine housing. Since there is no direct connection between the handle and the housing of the machine tool, a good decoupling of the handle relative to the vibrating housing is achieved.
  • the stability of the handle can be increased by the lever construction.
  • the present invention seeks to improve a machine tool of the type mentioned in that the components required for the vibration decoupling of the handle space can accommodate space inside the housing and / or the handle and especially in the working direction of the machine tool little space require so that the length of a handle portion of the machine tool consisting of the handle itself and serving for receiving the legs of the handle, the coupling members and the spring part of the housing of the machine tool can be reduced as much as possible.
  • the invention is based on the finding that the space required for the vibration decoupling of the handle components can be kept very small, if you do not synchronize the movements of the two legs of the handle by the coupling members themselves, but by an additional connecting element between the coupling members, the is articulated only on the two coupling links, but is not connected to the housing or with the handle.
  • the shape of the coupling elements can be better adapted to the space available in the grip region of the machine tool and thus a compact and cost-effective design can be provided.
  • a preferred embodiment of the invention provides that the connecting element is designed as a connecting rod, whose opposite ends are suitably hinged to the coupling members, that the connecting rod is aligned substantially transversely to the working direction of the machine tool, which contributes to reducing the overall length thereof.
  • a particularly space-saving version provides that the
  • Connecting element and parts of the coupling members are disposed within the hollow bow-shaped handle, whereby a part of the required components can be moved out of the housing of the machine tool out.
  • the two coupling members project through the open ends of the legs of the bracket into the hollow interior of the handle, where they are coupled by the connecting element, which expediently extends through the hollow yoke of the handle.
  • At least one coupling member is advantageously designed as a two-armed lever, one lever arm is pivotally connected to the housing and the other lever arm is articulated within the hollow handle on the connecting element, wherein the lever between the two lever arms is pivotally connected to a leg of the handle ,
  • the other coupling member is advantageously also designed as a two-armed lever, in which, however, one of the lever arms is pivotally connected to one leg of the handle and the other lever arm within the handle hingedly connected to the connecting element, while the lever itself is articulated between the two lever arms on the housing.
  • At least one coupling member may be formed as a disc which is pivotable in its center with the housing and at a distance from its center hinged to one of the legs and to the connecting element.
  • the resilient support of the handle in relation to the housing is expediently carried out by means of a pressure spring arranged between the handle and the housing, which is preferably arranged at least over part of its length next to the two legs.
  • FIG. 1 shows a simplified schematic side view of a hand tool
  • FIG. 2 shows a partially sectioned enlarged side view of a rear grip region of the hand-held power tool from FIG. 1 with an unloaded handle;
  • FIG. 3 shows a view corresponding to FIG. 2, but after pressing the hand tool against a workpiece while applying a compressive force to the handle;
  • Fig. 4 is a partially sectioned enlarged side view of the rear handle portion of another embodiment of the hand tool with unloaded handle;
  • FIG. 5 is a view corresponding to FIG. 4, but after
  • FIG. 6 is a partially sectioned enlarged side view of a rear handle portion of another embodiment of the power tool with unloaded handle;
  • Fig. 7 is a view corresponding to Fig. 6, but after pressing the power tool against a workpiece under application of a compressive force on the handle.
  • the hand-held power tool 2 shown schematically in FIG. 1 in the form of a hammer drill or a percussion hammer consists essentially of a housing 4, a tool holder 6 for receiving a tool 8, and a drive device (not shown) enclosed by the housing 4 for rotating and / or beating Driving the tool 8 inserted into the tool holder 6.
  • the drive device consists in a known manner of an electric drive motor which rotatably drives the tool holder 6 via a reduction or gearbox, and a likewise driven by the drive motor percussion, with which the tool 8 in the tool holder 6 with a in a
  • Working direction A of the machine tool 2 acting impact force can be acted upon.
  • the housing 4 is provided at its end remote from the tool holder 6 front end with a strap handle 10 which is used together with a near the tool holder 6 at 12 releasably attached to the housing 4 auxiliary handle 14 for gripping and holding the machine tool 2.
  • the over the housing 4 protruding strap handle 10 encloses together with the housing 4, a handle opening 16 for a hand of an operator and facilitates Especially in vertical operation, that is, in the vertical direction A and downwardly directed tool 8, the holding and guiding the machine tool 2, while the auxiliary handle 14 is more in horizontally oriented or flat inclined working direction A used.
  • the strap handle 10 consists essentially of a yoke 18 and two parallel to the working direction A of the machine tool 2 legs 20, 22, the free ends by two spaced apart adjacent openings 24, 26 of a Handle opening 16 to the front to be limited wall portion 28 of the housing 4 in a chamber 30 in the interior of a remote from the tool holder 6 handle portion 32 of the housing 4 protrude.
  • the chamber 30 enclosed by the housing 4 contains a helical compression spring 34, which is arranged between a part of the strap handle 10 and the housing 4 and which is preferably arranged at least in part next to the legs 20, 22.
  • the spring 34 pushes the bow handle 10 in the unloaded state to the rear in a rear end position ( Figures 2, 4 and 6), in the rearwardly facing abutment surfaces 36 on the legs 20, 22 of the strap handle 10 against complementary, pointing forward in the direction of A Stop abutment surfaces 38 of the housing 4, which are formed around the openings 24, 26 around on the inside of the wall part 28.
  • the two coupling members 44, 46 each consist of a two-armed lever 50, 52, the two lever arms 54, 56th or 58, 60 in the region of a pivot axis 62 of the lever 50, 52 are aligned approximately at right angles to each other.
  • each lever arm 54 or 58 of each lever 50, 52 within the handle portion 32 of the housing 4th enclosed chamber 30, wherein it is aligned in a middle position of the handle 10 in the middle between the front and rear end position substantially perpendicular to the working direction A of the machine tool 2, while the second lever arm 56 and 60 of each lever 50, 52 respectively through the open front end of the adjacent leg 20 and 22 projects into the hollow handle 10, where the free ends of these lever arms 56, 60 are connected by the connecting element 48 with each other, but not with the handle 10 or the housing 4.
  • the lever 50 (shown in Figures 2 and 3 above) is pivotally connected via its pivot axis 62 at the free end of the adjacent leg 20 of the strap handle 10 and pivotally connected to the free end of its lever arm 54 on a wall projection 64 of the boundary wall 42, wherein the in the hollow handle 10 protruding lever arm 56 is bent approximately parallel to the lever arm 54 within the handle 10, and wherein the bent portion 66 is aligned approximately perpendicular to the working direction A in the rear end position of the strap handle 10.
  • lever 52 (shown in Figures 2 and 3 below) articulated via its pivot axis 62 to an adjacent wall projection 68 of the boundary wall 42, wherein its two lever arms 58, 60 are each formed in a straight line and the lever arm 58 pivotally with its free end is articulated at a perpendicular to the working direction A on the front end of the leg 22 projecting and projecting into the chamber 30 projection 70 of the strap handle 10, which also serves as an abutment for the rear end face of the helical compression spring 34.
  • the connecting element 48 has the shape of an elongated, straight connecting rod which is arranged in the hollow yoke 18 of the strap handle 10 and aligned substantially perpendicular to the working direction A of the machine tool 2, with their opposite ends each hinged to the free ends of the lever arms 56 and 60 of the lever 50 and 52 connected are.
  • the pivot axes 62 of the levers 50, 52 and the pivot joints at the free ends of the lever arms 54, 56, 58, 60 are each aligned perpendicular to a plane defined by the yoke 18 and the legs 20, 22 of the bow handle 10.
  • the width of the legs 20, 22 and the yoke part 18 of the handle 10 is adapted to the shape and dimensions of the two levers 50, 52, that the latter in the movement of the strap handle 10 between the front and the rear end position within the chamber 30th and the hollow handle 10 to pivot about the movement path of the handle 10 corresponding pivoting.
  • Machine tool 2 with a massive bow handle 10 formed by two circular discs 72 and 74, which are each rotatably mounted on an inner side of the leg 20 and 22 adjacent wall projection 76, 78 of the boundary wall 42, wherein the axes of rotation of the discs 72, 74th extend through their centers.
  • Each of the discs 72, 74 carries at a radial distance from its center a projecting over a broad side surface pivot pin 80 which rotatably engages in a complementary bore, which is arranged in the vicinity of the free end end in the adjacent legs 20 and 22 respectively.
  • the two disks 72, 74 are coupled by the connecting element 48 such that a pivoting or rotational movement of the one disk 72 or 74 leads to a corresponding pivoting or rotational movement of the other disk 74 or 72, that is, a rotation about a corresponding swivel angle.
  • the connecting element 48 here also has the form of a straight elongated connecting rod 82, whose opposite ends are hinged to the disc 72 and 74, respectively, at a radial distance from the center of the disc 72, 74 and in one Angular distance of about 90 degrees from the pivot pin 80.
  • the axes of rotation of the discs 72, 74 and the pivot axes of the pivot pin 80 and the pivot points of the connecting rod 82 on the discs 72, 74 perpendicular to a plane spanned by the strap handle 10 level.
  • connecting rod 82 in the embodiment shown in Figures 4 and 5 is oriented perpendicular to the working direction A of the machine tool 2, seen in the working direction A of the machine tool 2, their articulation points on the two discs 72, 74 behind the centers of the discs 72, 74 are arranged are in the embodiment in Figures 6 and 7 inclined at a shallow angle to the working direction A of the machine tool, as seen in the direction of A of the machine tool 2, one of the front ends of
  • Connecting rod 82 is disposed in front of the center of the adjacent disc 72 and the other behind the center of the adjacent disc 74.

Landscapes

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

Abstract

L'invention concerne une machine-outil portative (2), en particulier un marteau perforateur et/ou à percussion, avec un carter (4) et une poignée (10) amortissant les vibrations, soutenue de manière élastique par rapport au carter (4), avec deux branches (20, 22) essentiellement parallèles, ainsi qu'un élément d'accouplement (44 respectivement 46) disposé entre chaque branche (20 respectivement 22) et le carter (4) et relié de manière articulée avec la branche (20 respectivement 22) et le carter (4). Il est prévu de relier ensemble les éléments d'accouplement (44, 46) par un élément de liaison (48) synchronisant les mouvements des éléments d'accouplement (44, 46).
EP07727820A 2006-05-08 2007-04-05 Machine-outil portative avec une poignée amortissant les vibrations Withdrawn EP2018249A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006021307A DE102006021307A1 (de) 2006-05-08 2006-05-08 Handwerkzeugmaschine mit einem vibrationsgedämpften Handgriff
PCT/EP2007/053352 WO2007128634A1 (fr) 2006-05-08 2007-04-05 Machine-outil portative avec une poignée amortissant les vibrations

Publications (1)

Publication Number Publication Date
EP2018249A1 true EP2018249A1 (fr) 2009-01-28

Family

ID=38164431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727820A Withdrawn EP2018249A1 (fr) 2006-05-08 2007-04-05 Machine-outil portative avec une poignée amortissant les vibrations

Country Status (6)

Country Link
US (1) US8061438B2 (fr)
EP (1) EP2018249A1 (fr)
JP (1) JP4881430B2 (fr)
CN (1) CN101437655B (fr)
DE (1) DE102006021307A1 (fr)
WO (1) WO2007128634A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006016442A1 (de) * 2006-04-07 2007-10-11 Robert Bosch Gmbh Handwerkzeugmaschine mit vibrationsgedämpftem Handgriff
DE102006051924A1 (de) * 2006-11-03 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine mit einem vibrationsgedämpften, mit einem Schalter versehenen Handgriff
GB2451293A (en) * 2007-07-27 2009-01-28 Black & Decker Inc Hammer drill with slidably mounted handle
DE102007061715A1 (de) * 2007-12-19 2009-06-25 Robert Bosch Gmbh Griffvorrichtung, insbesondere Handwerkzeugmaschinengriffvorrichtung
JP5180697B2 (ja) * 2008-06-19 2013-04-10 株式会社マキタ 手持式作業工具
JP5361504B2 (ja) * 2009-04-10 2013-12-04 株式会社マキタ 打撃工具
JP5395531B2 (ja) * 2009-06-19 2014-01-22 株式会社マキタ 作業工具
AU2010263293B2 (en) * 2009-06-25 2015-11-26 Atlas Copco Airpower, Naamloze Venootschap Hand-held demolition tool
US20120048580A1 (en) * 2010-09-01 2012-03-01 Hilti Aktiengesellschaft Power tool
GB201112825D0 (en) * 2011-07-26 2011-09-07 Black & Decker Inc A hammer drill
GB201112833D0 (en) * 2011-07-26 2011-09-07 Black & Decker Inc A hammer drill
US9308636B2 (en) 2012-02-03 2016-04-12 Milwaukee Electric Tool Corporation Rotary hammer with vibration dampening
US9849577B2 (en) 2012-02-03 2017-12-26 Milwaukee Electric Tool Corporation Rotary hammer
DE102012103587A1 (de) * 2012-04-24 2013-10-24 C. & E. Fein Gmbh Handführbare Werkzeugmaschine mit Außengehäuse
JP2015089593A (ja) * 2013-11-05 2015-05-11 株式会社マキタ 作業工具
JP7287981B2 (ja) * 2018-05-29 2023-06-06 ローベル バーンバウマシーネン ゲゼルシャフト ミット ベシュレンクテル ハフツング 軌道のナットおよびねじを締め付けるためおよび緩めるためのインパクトレンチ
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool
JP7624319B2 (ja) * 2021-02-04 2025-01-30 株式会社マキタ 打撃工具
JP7585085B2 (ja) * 2021-02-22 2024-11-18 株式会社マキタ 打撃工具

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US3322211A (en) * 1964-05-06 1967-05-30 Novosib Elektrotekhnichesky I Elastic handle for vibrating-impact mechanisms
JPS5981027A (ja) * 1982-10-29 1984-05-10 Sony Corp 移動テ−ブル駆動機構
DE3447401A1 (de) * 1984-12-24 1986-07-03 Wacker-Werke Gmbh & Co Kg, 8077 Reichertshofen Hammer mit schutzhaube
DE3716701A1 (de) * 1987-05-19 1988-12-01 Porsche Ag Aerodynamisch ausgebildetes verkleidungsteil fuer die unterseite eines kraftfahrzeuges
PL153240B1 (en) * 1988-03-29 1991-03-29 Politechnika Poznanska Vibration damping arrangement for hand tools
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DE10138123A1 (de) 2001-08-03 2003-02-27 Bosch Gmbh Robert Handwerkzeugmaschine mit vibrationsgedämpftem Handgriff
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GB2402098B (en) * 2003-05-21 2007-10-17 Black & Decker Inc Vibration reduction apparatus for power tool and power tool incorporating such apparatus
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Also Published As

Publication number Publication date
JP4881430B2 (ja) 2012-02-22
CN101437655A (zh) 2009-05-20
CN101437655B (zh) 2011-08-03
US20080283261A1 (en) 2008-11-20
DE102006021307A1 (de) 2007-11-15
WO2007128634A1 (fr) 2007-11-15
US8061438B2 (en) 2011-11-22
JP2009536101A (ja) 2009-10-08

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