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WO1996008339A1 - Outil a main electrique - Google Patents

Outil a main electrique Download PDF

Info

Publication number
WO1996008339A1
WO1996008339A1 PCT/DE1995/001083 DE9501083W WO9608339A1 WO 1996008339 A1 WO1996008339 A1 WO 1996008339A1 DE 9501083 W DE9501083 W DE 9501083W WO 9608339 A1 WO9608339 A1 WO 9608339A1
Authority
WO
WIPO (PCT)
Prior art keywords
pivot pin
hand lever
spindle
hand
machine according
Prior art date
Application number
PCT/DE1995/001083
Other languages
German (de)
English (en)
Inventor
Alfred Kleider
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 JP8509794A priority Critical patent/JPH10505794A/ja
Priority to BR9508931A priority patent/BR9508931A/pt
Publication of WO1996008339A1 publication Critical patent/WO1996008339A1/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
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/38—Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing

Definitions

  • the invention is based on an electrical
  • Hand tool with a rotating tool e.g. Angle grinder, circular saw or the like.
  • a rotating tool e.g. Angle grinder, circular saw or the like.
  • a spindle lock which can be operated manually, is integrated in the machine housing and can be released or released when the work spindle is secured against rotation
  • the spindle lock cannot be inserted immediately into every rotational position of the clamping flange, but sometimes only after a certain rotation of the clamping flange, after which the locking cams can plunge unhindered into the groove.
  • This rotation of the clamping flange will usually take place at the start of loosening or tightening the clamping nut, the latching cam then jerking into the groove when the hand lever is actuated. This is associated with an abrupt swiveling movement of the hand lever.
  • the electrical hand tool according to the invention with the characterizing features of claim 1 has the advantage that the locking cams can rotate into one of the circular-shaped grooves in any rotational position of the clamping flange and - with not exactly radially aligned assignment of the groove axis and
  • Locking cam axis - by swiveling the locking cam in the groove of the clamping flange is gradually turned until the round, flattened locking cams fit positively in the semicircular groove.
  • the spindle lock is effective and the clamping flange is non-rotatably fixed. Due to the parallel alignment of the swivel axis of the hand lever to the spindle axis, the spindle lock can be installed in a space-saving manner at almost any point on the machine housing and thus placed according to only ergonomic considerations.
  • a return spring acts on the pivot pin or hand lever, which attempts to return the pivot pin to a basic position in which the latching cam is pivoted out of the groove ring.
  • a return spring which is preferably designed as a torsion spring seated on the pivot pin with a coaxial spring axis to the pivot pin axis, ensures that the spindle lock is always released and is only active as long as the hand lever is held actuated by the operator. As soon as the lever is released, the spindle lock is released.
  • Fig. 2 is a partial plan view of the
  • the angle grinder or angle grinder shown in section in FIG. 1 and in a bottom view in FIG. 2 as an example of an electric hand-held power tool has a machine housing 10 which has an electric drive motor, of which only the output shaft 11 can be seen in FIG. 1, a transmission gear 12 and a work spindle 13 receives.
  • the work spindle 13 is rotatably supported in a ball bearing 14 and a needle bearing 15, both of which are designed as radial bearings, the needle bearing 15 being received by the machine housing 10 and the ball bearing 14 by a bearing neck 16 made of plastic, which is fixed to the machine housing 10 connected is.
  • the working spindle 13 protrudes above the bearing neck 16 and receives a turning tool 18 in the form of a cutting or grinding wheel in a clamping device 17 seated on the protruding 131.
  • the clamping device 17 comprises a clamping flange 19 which is plugged onto the protrusion 131 of the work spindle 13 and is connected to it in a non-rotatable and radially and axially non-displaceable manner and
  • Locking nut 20 which can be screwed onto a threaded section 21 on the protruding 131.
  • the turning tool 18 is placed with a central centering hole 22 in a form-fitting manner on a receiving pin 23 formed on the end face of the clamping flange 19 and non-positively against the annular one by means of the clamping nut 20 End face 191 of the clamping flange 19 pressed. Possibly. can be inserted between the clamping nut 20 and the disc-shaped turning tool 18, a clamping washer 24.
  • the spindle lock 25 has, on the one hand, a groove ring 27 formed on the outside of the clamping flange 19 and comprising a plurality of grooves 28 with an arc-shaped cross section offset from one another by the same angle of rotation spacing, and a latching cam 32 with a flattened round profile, which interacts with the groove ring 27.
  • the groove cross section of the grooves 28 and the profile of the locking cam 32 are coordinated with one another in such a way that the locking cam 32 lies in the grooves 28 in a form-fitting manner.
  • the locking cam 32 is formed at the free end of a pivot pin 31 which is rotatably mounted in the bearing neck 16, its axis of rotation 30 being aligned parallel to the spindle axis.
  • a hand lever 29 is connected in a rotationally fixed manner to the pivot pin 31, the hand lever 29, the pivot pin 31 and the locking cam 32 preferably being produced as a one-piece plastic injection-molded part.
  • the hand lever 29 is arranged near the end of the pivot pin 31 facing away from the locking cam 32, a pivot pin section 311 continuing beyond the hand lever 29.
  • a restoring spring 33 designed as a torsion spring is pushed onto this pivot pin section 311, one of its spring ends on the bearing neck 16 and the other spring end on
  • Pivot pin 31 is fixed.
  • the return spring 33 is designed so that it tries to turn the pivot pin 31 into a basic position, in which the locking cam 32 is pivoted completely out of the groove 28 and is immediately radially in front of the groove ring 27 on the clamping flange 19 (pulled out in Fig. 1 and 2 shown).
  • This basic position of the The pivot pin 31 or locking cam 32 is predetermined by a stop 34 formed on the clamping neck 16, against which the hand lever 29 bears (FIG. 2).
  • the hand lever 29 projects slightly beyond this through an opening 35 in the bearing neck 16 and carries a handle plate at the end 291 (Fig. 1).
  • the clamping nut 20 must first be loosened using a wrench.
  • the operator places a finger on the handle plate 291 of the hand lever 29 and swivels it in the direction of the arrow 26 in FIG. 2.
  • the pivot pin in FIG Latching cam 32 pivots into one of the circular arc-shaped grooves 28 in the groove ring 27.
  • the clamping flange 19 and thus the work spindle 13 is held non-rotatably when the hand lever 29 is held.
  • the clamping nut 20 can now by means of

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Braking Arrangements (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

L'invention concerne un outil à main électrique qui comprend un arbre moteur (13) pour entraîner un outil rotatif (18), un dispositif de serrage (17) qui relie l'outil rotatif (18) à l'arbre moteur de manière solidaire en rotation, ainsi qu'un système d'arrêt de l'arbre (25) à actionner manuellement et servant à empêcher l'arbre moteur (13) de tourner lors du changement de l'outil rotatif (18). Afin que le système d'arrêt de l'arbre (25) ait une structure avantageuse sur le plan ergonomique et qu'il résiste à l'usure, ledit système d'arrêt de l'arbre comporte d'une part une couronne à encoches (27) montée à l'extérieur sur un flasque de serrage (19) recevant l'outil rotatif (18) et pourvue de plusieurs encoches (28) de section en arc de cercle, et d'autre part, une came à cran d'arrêt (32) à profil rond aplati, pouvant pivoter dans les encoches (28) et fixée sur un levier à main (29) à axe de rotation (30) parallèle à l'axe de l'arbre moteur (13).
PCT/DE1995/001083 1994-09-16 1995-08-17 Outil a main electrique WO1996008339A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8509794A JPH10505794A (ja) 1994-09-16 1995-08-17 手持ち式電動工作機械
BR9508931A BR9508931A (pt) 1994-09-16 1995-08-17 Máquina ferramenta manual elétrica

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4432973.3 1994-09-16
DE4432973A DE4432973B4 (de) 1994-09-16 1994-09-16 Elektrische Handwerkzeugmaschine mit einer Spindelarretierung

Publications (1)

Publication Number Publication Date
WO1996008339A1 true WO1996008339A1 (fr) 1996-03-21

Family

ID=6528353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001083 WO1996008339A1 (fr) 1994-09-16 1995-08-17 Outil a main electrique

Country Status (6)

Country Link
JP (1) JPH10505794A (fr)
CN (1) CN1074969C (fr)
BR (1) BR9508931A (fr)
DE (1) DE4432973B4 (fr)
IT (1) IT1277563B1 (fr)
WO (1) WO1996008339A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319974A (en) * 1996-12-05 1998-06-10 Bosch Gmbh Robert Machine tool spindle lock
CN103963026A (zh) * 2013-02-05 2014-08-06 苏州宝时得电动工具有限公司 摆动动力工具

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1077481C (zh) * 1996-12-05 2002-01-09 罗伯特·博施有限公司 手工工具机
CA2348985A1 (fr) * 2000-06-23 2001-12-23 Black & Decker Inc. Commande de verrouillage de broche a selecteur de vitesse
ATE327863T1 (de) 2002-01-10 2006-06-15 Black & Decker Inc Getriebegehäuse
DE10208492A1 (de) 2002-02-27 2003-09-04 Bsh Bosch Siemens Hausgeraete Allesschneider mit einer Antriebseinheit
DE10361810A1 (de) * 2003-12-30 2005-07-28 Robert Bosch Gmbh Handwerkzeugmaschine mit Spanneinrichtung
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
CN100374255C (zh) * 2005-09-29 2008-03-12 苏州宝时得电动工具有限公司 电圆锯
WO2011024698A1 (fr) * 2009-08-28 2011-03-03 株式会社マキタ Outil électrique
WO2011024697A1 (fr) 2009-08-28 2011-03-03 株式会社マキタ Outil électrique
JP5523767B2 (ja) * 2009-08-28 2014-06-18 株式会社マキタ 動力工具
JP5437861B2 (ja) * 2010-03-09 2014-03-12 株式会社マキタ 電動工具
CN103100875A (zh) * 2012-11-13 2013-05-15 无锡市航鹄科技有限公司 高效车外圆定位工装
CN103645051A (zh) * 2013-11-29 2014-03-19 四川禧鑫机床制造有限责任公司 数控锥齿轮检查机
EP3012068B1 (fr) 2014-10-24 2020-06-24 Guido Valentini Outil électrique guidé et/ou tenu à la main
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch
DE102017214117A1 (de) 2017-08-11 2019-02-14 Robert Bosch Gmbh Schnellspannvorrichtung
CN108161671A (zh) * 2017-12-22 2018-06-15 宁波星瑞克中空铝条有限公司 一种中空玻璃用铝条打磨装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021723A (en) * 1958-09-10 1962-02-20 Diehl Mfg Co Spindle locking means for portable tools
US4402241A (en) * 1981-08-10 1983-09-06 Black & Decker Inc. Spindle locking means for power operated tool
FR2631864A1 (en) * 1988-05-25 1989-12-01 Somab Sa Multi-function machining head for machine tools
DE3844617A1 (de) * 1988-08-26 1990-03-22 Licentia Gmbh Elektrowerkzeugmaschine mit einer kombinierten einrichtung zur stillstandsbremsung und zum spannen des werkzeugs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018775C2 (de) * 1980-05-16 1982-12-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einrichtung zum Arretieren der Schleifspindel von Winkelschleifern
US4467896A (en) * 1983-06-17 1984-08-28 Black & Decker Inc. Locking mechanism for a rotary power machine
DE3447154C2 (de) * 1984-12-22 1998-02-19 Stihl Maschf Andreas Drehsicherung für ein drehbar gelagertes Werkzeug, insbesondere ein Schneidwerkzeug eines Freischneidegerätes
US4635502A (en) * 1985-02-27 1987-01-13 Black & Decker Inc. Rachet system for hand-held tool
DE3607377A1 (de) * 1986-03-06 1987-09-10 Metabowerke Kg Elektromotorisch angetriebener schleifer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021723A (en) * 1958-09-10 1962-02-20 Diehl Mfg Co Spindle locking means for portable tools
US4402241A (en) * 1981-08-10 1983-09-06 Black & Decker Inc. Spindle locking means for power operated tool
FR2631864A1 (en) * 1988-05-25 1989-12-01 Somab Sa Multi-function machining head for machine tools
DE3844617A1 (de) * 1988-08-26 1990-03-22 Licentia Gmbh Elektrowerkzeugmaschine mit einer kombinierten einrichtung zur stillstandsbremsung und zum spannen des werkzeugs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319974A (en) * 1996-12-05 1998-06-10 Bosch Gmbh Robert Machine tool spindle lock
GB2319974B (en) * 1996-12-05 1998-11-18 Bosch Gmbh Robert Manual machine tool
CN103963026A (zh) * 2013-02-05 2014-08-06 苏州宝时得电动工具有限公司 摆动动力工具

Also Published As

Publication number Publication date
DE4432973B4 (de) 2009-10-01
ITMI951889A0 (it) 1995-09-08
BR9508931A (pt) 1997-11-11
CN1074969C (zh) 2001-11-21
JPH10505794A (ja) 1998-06-09
IT1277563B1 (it) 1997-11-11
CN1157587A (zh) 1997-08-20
DE4432973A1 (de) 1996-03-21
ITMI951889A1 (it) 1997-03-08

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