WO1992012823A1 - Outilage a main - Google Patents

Outilage a main Download PDF

Info

Publication number
WO1992012823A1
WO1992012823A1 PCT/DE1991/000887 DE9100887W WO9212823A1 WO 1992012823 A1 WO1992012823 A1 WO 1992012823A1 DE 9100887 W DE9100887 W DE 9100887W WO 9212823 A1 WO9212823 A1 WO 9212823A1
Authority
WO
WIPO (PCT)
Prior art keywords
handle
motor housing
hand
turnstile
tool
Prior art date
Application number
PCT/DE1991/000887
Other languages
German (de)
English (en)
Inventor
Werner Grammer
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 JP3518089A priority Critical patent/JPH06504487A/ja
Publication of WO1992012823A1 publication Critical patent/WO1992012823A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/16—Hand-held sawing devices with circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • 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

Definitions

  • the invention is based on a handheld power tool, in particular a hand-held angle grinder, of the type defined in the preamble of claim 1.
  • On and off switch equipped for the electric drive which is operated via the switch strip.
  • the switch strip is located on the underside of the handle and is actuated by at least one finger when the handle is grasped and kept actuated while working with the machine.
  • the ergonomic design of the handle such as cross-sectional shape and angle of inclination to the device axis, is optimized for a single working position of the machine.
  • Some hand machine tools come in more than one
  • a Angle grinder for example, is used in addition to grinding or scrubbing for cutting work, for example for cutting stone slabs.
  • the optimal working position mentioned above is usually given for the scrubbing working position, in which the grinding wheel points downwards, that is to say is approximately parallel to the switch strip.
  • the angle grinder is rotated 90 ° about its longitudinal axis to the left or right so that the cutting disc is approximately perpendicular to the workpiece. This rotation puts the handle and the switch bar in an unfavorable position for the comprehensive hand. If the machine is turned to the left and the handle is gripped with the right hand, the switch bar comes to rest in the ball of the hand.
  • the switch bar can only be operated and held with the thumb. In both cases, the switch strip cannot be held securely and without fatigue. In addition, in the event of danger, the position of the switch-on lock and switch-on interlock cannot be reacted to and switched off quickly enough.
  • P 40 22 668.9 it has already been proposed (P 40 22 668.9) to make the handle rotatable relative to the motor housing and to fix it in defined working positions by means of a clamping and ⁇ ' locking device on the motor housing.
  • Such defined working positions of hand-held power tools are, for example, the so-called scrubbing position in an angle grinder, in which the grinding wheel is aligned approximately parallel to the switch strip, and the separation position rotated by 90 ° to one or the other side, in which the cutting disc is approximately at right angles to the switch strip.
  • This rotatability of the handle in a work position to be decided beforehand allows an ergonomically approximately optimal hand position for various work processes which require a changed posture of the hand-held power tool for the user.
  • the ergonomically optimal grip position varies with the same working position depending on the individual anatomical conditions of the user of the hand power tool.
  • the handle starting position should be able to be rotated up to 2 - 3 ° from the zero position relative to the motor housing in order to relieve the wrist of different users.
  • the handheld power tool according to the invention with the characterizing features of claim 1 has the advantage that the handle always adjusts itself automatically to the optimal grip position in a changed working position within a working process. For example, is with constantly changing working posture of an angle grinder, as occurs, for example, when deburring a pipe inside diameter with a constantly changing grinding wheel position, with the "force hand" using an additional handle on the motor housing
  • the pendulum handgrip according to the invention thus makes variable work possible with the hand tool without changing or changing or predetermining the required working position.
  • the pendulum handle also represents a cost-effective solution, since the complex clamping and locking device is eliminated.
  • Claim 1 specified hand tool possible.
  • a good rotation of the pendulum handle on the motor housing is achieved according to a preferred embodiment of the invention in that a central bearing journal is injection molded onto the motor housing, on which a turnstile is axially immovable and rotatably received, which is firmly connected to the handle.
  • a central bearing journal is injection molded onto the motor housing, on which a turnstile is axially immovable and rotatably received, which is firmly connected to the handle.
  • a machine housing that is dimensionally stable in the axial direction in every relative position of the handle and motor housing, and is easy to handle.
  • 1 is a side view of a hand-held electric angle grinder
  • Fig. 2 is an enlarged view of the handle
  • Fi ⁇ . 3 shows a section along the line II-II in Fis.
  • the hand-held electric angle grinder seen in side view in FIG. 1 as an exemplary embodiment of a general electric hand-held power tool has one
  • Machine housing 10 which in a motor housing 11, in a arranged on one end face of the motor housing 11, firmly connected to this gear head 12 with projecting drive spindle 13 with tool holder 20 for a grinding wheel 14 and in one on the other
  • Housing 15 of the motor housing 11 arranged handle 15 is divided, which is rotatable on the motor housing 11 about its longitudinal axis over a predetermined range of rotation.
  • the handle 15 consists of a handle 16, which is enclosed by the hand when working with the angle grinder, and of a bracket 17 attached to it in one piece, which covers the handle 16 on the underside while leaving a passage opening 18 and which when working with the angle grinder around the handle handle 16 placed down protective covers.
  • a switch strip 19 protrudes into the passage opening 18, which actuates an on and off switch for an electric drive actuator which is accommodated in the motor housing 11.
  • the angle grinder is used for so-called scrubbing.
  • the grinding wheel 14 is approximately parallel to the switch strip 19. From this scrubbing position, by turning the handle 15 or the motor housing 11 through 90 ° to the left or right, the angle grinding machine can be used for the “cutting” operation.
  • the handle 15 retains its position in FIG. 1 and the motor housing 11 together with the gear head 12 is rotated by 90 °, so that the grinding wheel 14 assumes the position shown in broken lines in FIG. 1, in which it is aligned approximately at right angles to the switch bar 19.
  • the so-called pendulum handle 15 can assume any position relative to the motor housing 15, depending on the position of the hand-held power tool by the user.
  • FIGS. 2 and 3 Details of the rotatable mounting of the pendulum handle 15 on the motor housing 11 are shown in FIGS. 2 and 3.
  • a central bearing journal 21 is injection molded onto the motor housing 11, on which a journal section 22 is reduced in diameter toward the free end, an annular shoulder 23 being formed at the transition from the journal journal 21 to the journal section 22.
  • the bearing journal 21 with journal section 22, like the motor housing 11, is made of plastic and is integrally formed on it during the injection molding process.
  • On the journal portion 22 of the journal 21 is.
  • a turnstile 24 with an annular collar 25 rotatably and axially immovable.
  • the annular collar 25 is supported axially via a sliding washer 26 on the annular shoulder 23 of the journal 21 and is held axially immovably by a clamping plate 27.
  • the clamping plate 27 is screwed onto the free end face of the pin section 22 by means of screws 28, a disc spring 2S being inserted between the clamping plate 27 and the end face of the collar 25 on the turnstile 24.
  • the turnstile 25 is made of plastic and is screwed to the handle 15, which consists of two housing shells 151 and 152, by means of two screws 30, 31, which at the same time hold the two housing shells 151, 152 together.
  • the two housing shells 151, 152 engage with a radial projection 32 in a circumferential groove 33 formed on the motor housing 11.
  • the rotational mobility of the pendulum handle 15 is without locking over a rotation range of 18C °.
  • This range of rotation is indicated by a stop cam 42 (FIG. 3) radially projecting from the bearing journal 21 and one in the collar 25 annular recess 43 extending over an angle of rotation of 180 ° is limited.
  • the annular recess 43 has such an arrangement that when the stop one of the two radial boundary surfaces 44 and 45 of the recess 43 on the stop cam 42, the grinding wheel 14 is perpendicular to the switch bar 19 on the underside of the handle 16 and thereby once to the left or points to the right.
  • the central bearing pin 21 has an axial opening 46. through which an electrical connection cable is passed between the on / off switch and the drive motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

Un outil à main, en particulier une meuleuse d'angle, présente un carter moteur (11) entourant un dispositif d'entraînement électrique pour une broche (13), et une poignée (15) disposée sur le carter moteur et tournant par rapport au carter (11) du moteur autour de l'axe longitudinal de celui-ci et comportant une barre de contact (19) servant à mettre en marche et à couper le moteur électrique. Pour obtenir une prise de l'outil à main qui corresponde en permanence à une ergonomie optimale pendant une opération nécessitant de modifier sans cesse la position de travail de l'outil à main, la possibilité de rotation de la poignée (15) est maintenue sans verrouillage sur la totalité de sa plage de rotation prédéterminée. La poignée oscillante (15) s'adapte en permanence à la postion, déterminée par l'utilisateur, dans laquelle est tenue l'outil à main pendant le travail, de sorte que la main a toujours une prise optimale pour actionner la barre de contact.
PCT/DE1991/000887 1991-01-28 1991-11-15 Outilage a main WO1992012823A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3518089A JPH06504487A (ja) 1991-01-28 1991-11-15 手持ち工作機械

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914102421 DE4102421A1 (de) 1991-01-28 1991-01-28 Handwerkzeugmaschine
DEP4102421.4 1991-01-28

Publications (1)

Publication Number Publication Date
WO1992012823A1 true WO1992012823A1 (fr) 1992-08-06

Family

ID=6423838

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1991/000887 WO1992012823A1 (fr) 1991-01-28 1991-11-15 Outilage a main

Country Status (4)

Country Link
EP (1) EP0569360A1 (fr)
JP (1) JPH06504487A (fr)
DE (1) DE4102421A1 (fr)
WO (1) WO1992012823A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2308081A (en) * 1995-12-12 1997-06-18 Bosch Gmbh Robert Hand machine tool

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6912790B2 (en) * 2001-12-03 2005-07-05 Milwaukee Electric Tool Corporation Handle arrangement for a reciprocating saw
US20050000097A2 (en) * 2001-12-03 2005-01-06 Thomas Bednar Handle arrangement for a power tool
US8061043B2 (en) 2006-11-15 2011-11-22 Milwaukee Electric Tool Corporation Power tool
AU2010348982A1 (en) * 2010-03-24 2012-10-11 Bryan C. Cook Ergonomic hand-held power tool and methods of use
CN104723292A (zh) * 2013-12-21 2015-06-24 苏州宝时得电动工具有限公司 摆动动力工具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021277A1 (de) * 1989-09-08 1991-03-21 Stihl Maschf Andreas Handgefuehrtes arbeitsgeraet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021277A1 (de) * 1989-09-08 1991-03-21 Stihl Maschf Andreas Handgefuehrtes arbeitsgeraet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2308081A (en) * 1995-12-12 1997-06-18 Bosch Gmbh Robert Hand machine tool
GB2308081B (en) * 1995-12-12 1998-01-07 Bosch Gmbh Robert Hand machine tool

Also Published As

Publication number Publication date
JPH06504487A (ja) 1994-05-26
DE4102421A1 (de) 1992-07-30
EP0569360A1 (fr) 1993-11-18

Similar Documents

Publication Publication Date Title
EP0569370B1 (fr) Outil electrique a main
EP0539382B1 (fr) Machine-outil manuelle electrique, notamment meuleuse angulaire
DE19546328B4 (de) Handwerkzeugmaschine mit einem drehbaren Handgriff
EP0569382B1 (fr) Outillage a main
DE60319783T2 (de) Gehrungssäge mit einem in mehrere Positionen versetzbaren Schalterhandgriff mit Verriegelungsmechanismus
EP0836544B1 (fr) Meuleuse portative electrique
EP2077924A2 (fr) Machine-outil portative, en particulier cisaille électrique
DE4432973B4 (de) Elektrische Handwerkzeugmaschine mit einer Spindelarretierung
DE19745306A1 (de) Kraftgetriebenes Handwerkzeug
EP1368156B1 (fr) Machine a main dotee d'un capot pivotant de couverture de l'outil
EP0986448A1 (fr) Machine electrique portable
WO1992012823A1 (fr) Outilage a main
EP1193036B1 (fr) Machine-outil à main à dispositif de blocage de l'arbre d'outil
EP0569361B1 (fr) Outillage a main
EP0791435A1 (fr) Outil manuel motorisé
DE3120871C2 (de) Arretiereinrichtung für die Antriebsspindel von Winkelschleifern oder dgl. Elektrowerkzeuge
DE3001907A1 (de) Vorrichtung zum arretieren der antriebsspindel von elektrowerkzeugen
DE2559132C2 (de) Griffanordnung für tragbare kraftbetriebene Werkzeuge
EP0558893A2 (fr) Outillage à main motorisé pour rectifier, polir, dérouiller ou pour traitement de surface du genre
DE202020103534U1 (de) Elektrowerkzeug
DE29522449U1 (de) Handwerkzeugmaschine
DE19549840B4 (de) Handwerkzeugmaschine
EP0765706B1 (fr) Machine-outil portable
EP4371703A1 (fr) Tronçonneuse
DE102005057328B3 (de) Exzentertellerschleifer mit Arretiereinrichtung

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1991920024

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1991920024

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1991920024

Country of ref document: EP