EP1938924A1 - Outil électrique portatif avec dispositif de freinage - Google Patents

Outil électrique portatif avec dispositif de freinage Download PDF

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Publication number
EP1938924A1
EP1938924A1 EP06026889A EP06026889A EP1938924A1 EP 1938924 A1 EP1938924 A1 EP 1938924A1 EP 06026889 A EP06026889 A EP 06026889A EP 06026889 A EP06026889 A EP 06026889A EP 1938924 A1 EP1938924 A1 EP 1938924A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
electric hand
tool according
brake disc
counter
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.)
Granted
Application number
EP06026889A
Other languages
German (de)
English (en)
Other versions
EP1938924B1 (fr
Inventor
Ludwig KÜTHER
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Priority to EP06026889A priority Critical patent/EP1938924B1/fr
Priority to ES06026889T priority patent/ES2347063T3/es
Priority to DE502006007386T priority patent/DE502006007386D1/de
Priority to AT06026889T priority patent/ATE473067T1/de
Priority to CN200710302340XA priority patent/CN101254588B/zh
Publication of EP1938924A1 publication Critical patent/EP1938924A1/fr
Application granted granted Critical
Publication of EP1938924B1 publication Critical patent/EP1938924B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028Angle tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29Details; Component parts; Accessories
    • B27B5/38Devices 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 relates to an electric hand tool, in particular angle grinder or cut-off, with a gear housing part, a motor housing part and a handle part, wherein at least the gear housing part and the motor housing part may be separate assembled components, and with a braking device for braking the drive shaft after switching off the device, wherein the Braking device is released or re-activated by a mechanical coupling with a manually operable actuating means of the device, wherein the braking device comprises a first rotatably fixed to the drive shaft brake disc and a non-rotating counter-brake disc which is spring-biased in the direction of the brake disc.
  • Such an electric hand tool device is known from, for example DE 37 41 536 A1 ,
  • the rotatable with the drive shaft brake disc with respect to the drive shaft by a complex device is linearly displaceable.
  • the mechanical coupling runs within the drive shaft, which is also expensive.
  • the present invention is based on the object to improve an electric hand tool device of the type mentioned in that the braking device is narrow construction, inexpensive and mechanically relatively easy to implement.
  • the construction is such that the counter-brake disc is slightly deflected by slight tilting of the planar actuator in the longitudinal direction of the drive shaft without tilting itself, so that the cooperating brake surfaces of brake disc and counter-brake disc disengage. Overall, this can be realized constructively simple.
  • the counter-brake disc is mounted quasi-floating around the drive shaft.
  • the counter-brake disc can be provided with a larger opening than the diameter of the drive shaft. It is preferably oriented in a floating manner by the spring biasing it.
  • the counter-brake disc has an inner collar or collar, which extends coaxially to the drive shaft and defines an opening through which the drive shaft extends therethrough.
  • the spring surrounds the collar or collar radially outwardly concentric.
  • a small clearance of preferably less than 1.5 mm is provided between the spring and the collar or collar, whereby a floating bearing of the counter-brake disc can be stabilized.
  • the spring can also be the inner collar or collar of the actuator surrounded without play and in particular hold the Betätigüngsorgan clamped or positive fit. In such a case, the floating storage would be achieved by the transverse elasticity of the spring itself.
  • the counter-brake disc may advantageously comprise an annular disk-shaped sheet-metal disc with a brake pad coating.
  • planar actuator is advantageously formed annular disc-shaped, so that it can be arranged around the drive shaft around.
  • the planar actuator has radial or axial projections, which may be formed in particular in one piece with the actuating member.
  • the actuator can be made for example as a bending stamping.
  • the actuating connection between the actuating member and the counter-brake disc can basically be realized in various ways. According to one embodiment of the invention, this is realized so that at least one, preferably two of the approaches of the planar actuator are bent out of the ring disk plane and engage behind the counter-brake disc in the axial direction of the drive shaft. In this way, an immediate coupling between areal actuator and counter brake disc would be achieved.
  • the said at least one approach may be angled for example at least twice.
  • the tiltable mounting of the planar actuator can also be realized in various ways.
  • the actuator could be provided tiltable in a housing groove.
  • the planar actuator is pivotally mounted via at least one, preferably two approaches against a housing component of the power tool to perform the tilting movement can.
  • the aforementioned approaches can in turn be formed integrally with the planar actuator. They may preferably be extended in the plane of the actuator. It has been found that only a particular slot-shaped recess in a flange or a housing component of the electric power tool device must be provided in this way in order to keep the actuator fixed in position and tilted.
  • the actuator is released by mechanical coupling with a manually operable actuating means of the device or moves in the locking direction of the braking device.
  • the manually operable actuating means may be, for example, a pusher or a button or a slider which is operated directly manually with the fingers of a user.
  • the manually operable actuating means acts directly or indirectly via a pusher mechanism on the planar actuator.
  • a pusher mechanism can be realized advantageously a few components comprehensive mechanical coupling. Since in the present case only a tilting of the planar actuator has to be performed, proves a thrust mechanism, the preferably comprises only a single component, as particularly advantageous, effective and simple.
  • the mechanical coupling between the manually operable actuating means and the planar actuating member engages radially outward on the actuating member, since such a maximum tilting moment is achieved.
  • the mechanical coupling engages radially outward on a radial projection of the actuating member, which in turn is preferably formed integrally with the actuating member.
  • the inventively designed braking device also proves to be advantageous in that it can be accommodated between the gear housing part and the motor housing part or between the motor housing part and the handle part. Therefore, it proves to be advantageous according to a further inventive idea that an intermediate housing flange can be provided and the braking device can be accommodated in this correspondingly narrow-built intermediate housing flange, which then between the gear housing part and the motor housing part or alternatively between the Motor housing part and the handle part can be provided as a module component. In this way, the braking device manufacturer can be realized as an optional module, so that the manufacturer can offer both electric hand tool devices without the corresponding braking device or with such a braking device with relatively little additional effort.
  • the intermediate housing flange with the components of the braking device can then be omitted (it is then usually only necessary to provide a shorter drive shaft), or alternatively the intermediate flange is retained, but omitting the components of the braking device.
  • the intermediate housing flange has an axial length of 15 to 40 mm, in particular 15 to 30 mm.
  • the figures show an electric hand tool device, generally designated by the reference numeral 2, in the form of an angle or cut-off grinder.
  • the device comprises a handle part 4, which also forms a motor housing part 6, to which an intermediate housing flange 8 to be described later connects, and a transmission housing part 10, perpendicular to a longitudinal central axis 12 of the device (see FIG. 4 ) extends a tool spindle 14 out.
  • an unillustrated grinding or cutting tool can be set in a conventional manner.
  • An electric motor 16 extends a drive shaft 18 in the direction 12 of the longitudinal central axis through the intermediate housing flange 8 into the gear housing part 10.
  • the drive shaft 18 drives the tool spindle 14 via an angle gear 20.
  • the brake device 22 comprises a fixedly mounted on the drive shaft 18 brake disc 24 and a counter brake disc 26. Furthermore, the brake device 22 comprises a spring 28 which biases the counter brake disc 26 in the longitudinal direction 12 in the direction of the brake disc 24. The spring 28 is supported at one end against a support forming a collar 30 of the gear housing part 10 and charged at the other end the counter-brake disc 26. In this area, the counter-brake disc 26 on an inner collar 32, which defines a passage opening for the drive shaft 18.
  • the collar 32 extends in the direction of the transmission housing part 10, so that the spring 28 can surround the collar 32 radially on the outside.
  • the spring 28 thus stabilizes the floating bearing and arrangement of the counter-brake disc 26 around the drive shaft 18 around.
  • the counter brake disc 26 is formed from a sheet metal part and carries on its side facing the brake disc 24 a brake pad coating 34. The counter brake disc 26 is thus pressed against the drive shaft 18 rotatably and fixedly arranged brake disc 24 by the spring 28. Since the counter-brake disc 26 is not reversible relative to the intermediate housing flange 8, so the drive shaft 18 is braked.
  • a planar extending actuator 36 is provided to release the braking device 22.
  • the actuator 36 is about more second approaches 44 as best FIG. 2 can be seen coupled to the counter-brake disc 26 in the axial direction.
  • These lugs 44 are integrally formed in the case illustrated by way of example with the planar annular disk-shaped actuating member 36.
  • the lugs 44 are bent away from the plane of the actuator; they are bent over twice and engage behind a radial projection 46 of the counter-brake disc 26.
  • This mechanical coupling is provided on opposite sides, in such a way that the radial lugs 46 of the counter-brake disc approximately in the middle, that is at 3:00 clock and 9:00 clock Position are formed. In this way, in the illustrated orientation of the pivot axis 40 of the actuating member 36, a uniform linear actuating force in the longitudinal direction 12 is introduced to the counter-brake disc 26 without the brake disc 26 undergoes a significant tilting moment.
  • a pusher mechanism 48 For tilting the planar actuator 36 in the in FIG. 4 shown release position of the braking device 22, a pusher mechanism 48 is used.
  • This thrust mechanism 48 includes a push rod-like parallel to the drive shaft 18 in the longitudinal direction 12 sliding coupling element 50 which acts on the planar actuator 36, in the exemplary illustrated case in the range of 12:00 o'clock position, where it against a third radial projection 52 of the actuator 36 is present.
  • the coupling element 50 is connected by a manually operable slide 54 on the Controlled top of the motor housing part 6. When this slider 54 is pushed into its on position for putting the electric hand tool device, so is the coupling element 50 of the thrust mechanism 48, the planar actuator 36 in the in FIG. 4 tilted position shown.
  • the counter-brake disc 36 is moved against the spring force in the longitudinal direction 12 and in the direction of the gear housing part 10, so that the counter-brake disc 26 of the drive shaft 18 rotatably fixed brake disc 24 free and the braking device 22 is thereby solved ,
  • the counter-brake disc 26 is pushed back under the action of the spring 28 in the direction of the rotating brake disc 24, whereby the drive shaft 18 is stopped quickly.
  • the intermediate housing flange 8 is formed as a module-like housing component and disposed between the motor housing part 6 and the gear housing part 10.
  • the brake device 22 is arranged on the other side of the electric motor 16 between the motor housing part and the handle part of the electric hand tool device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Braking Arrangements (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Gripping On Spindles (AREA)
EP06026889A 2006-12-27 2006-12-27 Outil électrique portatif avec dispositif de freinage Active EP1938924B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP06026889A EP1938924B1 (fr) 2006-12-27 2006-12-27 Outil électrique portatif avec dispositif de freinage
ES06026889T ES2347063T3 (es) 2006-12-27 2006-12-27 Herramienta electrica portatil con dispositivo de frenado.
DE502006007386T DE502006007386D1 (de) 2006-12-27 2006-12-27 Elektrohandwerkzeug mit Bremseinrichtung
AT06026889T ATE473067T1 (de) 2006-12-27 2006-12-27 Elektrohandwerkzeug mit bremseinrichtung
CN200710302340XA CN101254588B (zh) 2006-12-27 2007-12-25 具有制动装置的电动手持工具机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06026889A EP1938924B1 (fr) 2006-12-27 2006-12-27 Outil électrique portatif avec dispositif de freinage

Publications (2)

Publication Number Publication Date
EP1938924A1 true EP1938924A1 (fr) 2008-07-02
EP1938924B1 EP1938924B1 (fr) 2010-07-07

Family

ID=38089158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06026889A Active EP1938924B1 (fr) 2006-12-27 2006-12-27 Outil électrique portatif avec dispositif de freinage

Country Status (5)

Country Link
EP (1) EP1938924B1 (fr)
CN (1) CN101254588B (fr)
AT (1) ATE473067T1 (fr)
DE (1) DE502006007386D1 (fr)
ES (1) ES2347063T3 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030632A1 (de) * 2008-06-24 2009-12-31 Metabowerke Gmbh Elektrohandwerkzeuggerät mit Bremseinrichtung
DE102009053614A1 (de) 2009-11-17 2011-05-19 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät
EP2364811A2 (fr) 2010-03-09 2011-09-14 Makita Corporation Outil électrique
EP2407278A2 (fr) 2010-07-16 2012-01-18 Makita Corporation Structure d'accueil pour mécanisme de freinage dans un outil électrique
WO2012159803A1 (fr) * 2011-05-24 2012-11-29 Robert Bosch Gmbh Dispositif de freinage pour machine-outil
EP2548698A2 (fr) 2011-07-22 2013-01-23 Makita Corporation Outil électrique
DE102012218197A1 (de) 2012-05-04 2013-11-07 Robert Bosch Gmbh Werkzeugmaschinenbremsvorrichtung
EP3150333A3 (fr) * 2015-09-30 2017-04-26 Chervon (HK) Limited Outil électrique portatif comprenant un ensemble de freinage amélioré
CN107584456A (zh) * 2016-07-06 2018-01-16 苏州宝时得电动工具有限公司 一种摆动机构及多功能机
DE102016125765A1 (de) 2016-12-28 2018-06-28 Metabowerke Gmbh Elektrohandwerkzeugmaschine
US11554460B2 (en) * 2017-09-19 2023-01-17 Makita Corporation Rotating tool

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011005812A1 (de) * 2011-03-18 2012-09-20 Robert Bosch Gmbh Werkzeugmaschinenbremsvorrichtung
EP2505307B1 (fr) * 2011-03-31 2014-01-08 Makita Corporation Outil électrique
WO2013116680A1 (fr) 2012-02-03 2013-08-08 Milwaukee Electric Tool Corporation Marteau rotatif
DE102012210133A1 (de) * 2012-06-15 2013-12-19 Robert Bosch Gmbh Werkzeugmaschinenbremsvorrichtung
DE102013200865A1 (de) 2013-01-21 2014-07-24 Robert Bosch Gmbh Werkzeugmaschinenbremsvorrichtung
CN105014541A (zh) * 2014-04-23 2015-11-04 电能有限公司 具有停机制动装置的手持电动砂轮机
CN106553161B (zh) * 2015-09-30 2019-08-06 南京德朔实业有限公司 动力工具
JP6867895B2 (ja) * 2017-06-23 2021-05-12 株式会社マキタ 作業工具
DE102019210187A1 (de) * 2019-07-10 2021-01-14 Festool Gmbh Werkzeugvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703654A (en) * 1971-06-30 1972-11-21 Ralph Karubian Hand tool with magnetic brake
DE2832693A1 (de) * 1978-07-26 1980-02-07 Licentia Gmbh Antriebsmotor fuer kreissaegen
DE3722629A1 (de) 1987-07-09 1989-01-19 Metabowerke Kg Winkelschleifer mit bremseinrichtung
DE3741536A1 (de) 1987-12-08 1989-06-22 Erhard Pauls Bremsvorrichtung zur abbremsung von rotierenden maschinenelementen wie z. b. des rotors einer hand-winkelschleifmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59801010D1 (de) * 1998-08-28 2001-08-16 Ceka Elektrowerkzeuge Ag & Co Automatische Spindelarretierung
DE10316889B4 (de) * 2003-04-12 2007-06-06 Metabowerke Gmbh Elektrohandwerkzeuggerät mit einem Klemmgesperre
DE10336637B3 (de) * 2003-08-08 2005-04-28 Metabowerke Gmbh Elektrische Schlagbohrmaschine
DE10338608B3 (de) * 2003-08-22 2004-10-07 Metabowerke Gmbh Elektrohandwerkzeuggerät
FR2881391B1 (fr) * 2005-02-02 2007-04-13 Bosch Gmbh Robert Servomoteur pneumatique a sieges decales portes par deux douilles coulissantes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703654A (en) * 1971-06-30 1972-11-21 Ralph Karubian Hand tool with magnetic brake
DE2832693A1 (de) * 1978-07-26 1980-02-07 Licentia Gmbh Antriebsmotor fuer kreissaegen
DE3722629A1 (de) 1987-07-09 1989-01-19 Metabowerke Kg Winkelschleifer mit bremseinrichtung
DE3741536A1 (de) 1987-12-08 1989-06-22 Erhard Pauls Bremsvorrichtung zur abbremsung von rotierenden maschinenelementen wie z. b. des rotors einer hand-winkelschleifmaschine

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030632A1 (de) * 2008-06-24 2009-12-31 Metabowerke Gmbh Elektrohandwerkzeuggerät mit Bremseinrichtung
DE102009053614A1 (de) 2009-11-17 2011-05-19 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät
WO2011061022A1 (fr) 2009-11-17 2011-05-26 Metabowerke Gmbh Appareil de meulage d'angle commandé par moteur
DE102009053614B4 (de) * 2009-11-17 2012-02-09 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät
US9095950B2 (en) 2009-11-17 2015-08-04 Metabowerke Gmbh Motor-driven angle grinder
EP2364811A2 (fr) 2010-03-09 2011-09-14 Makita Corporation Outil électrique
EP2364811A3 (fr) * 2010-03-09 2014-06-25 Makita Corporation Outil électrique
US8657032B2 (en) 2010-03-09 2014-02-25 Makita Corporation Electric tool
US8596427B2 (en) 2010-07-16 2013-12-03 Makita Corporation Installment structure for braking mechanism in power tool
EP2407278A2 (fr) 2010-07-16 2012-01-18 Makita Corporation Structure d'accueil pour mécanisme de freinage dans un outil électrique
EP2407278A3 (fr) * 2010-07-16 2013-08-14 Makita Corporation Structure d'accueil pour mécanisme de freinage dans un outil électrique
WO2012159803A1 (fr) * 2011-05-24 2012-11-29 Robert Bosch Gmbh Dispositif de freinage pour machine-outil
US9546701B2 (en) 2011-05-24 2017-01-17 Robert Bosch Gmbh Power tool brake mechanism
EP2548698A3 (fr) * 2011-07-22 2014-07-23 Makita Corporation Outil électrique
JP2013022702A (ja) * 2011-07-22 2013-02-04 Makita Corp 電動工具
EP2548698A2 (fr) 2011-07-22 2013-01-23 Makita Corporation Outil électrique
US9278426B2 (en) 2011-07-22 2016-03-08 Makita Corporation Electric power tool
WO2013164118A1 (fr) 2012-05-04 2013-11-07 Robert Bosch Gmbh Dispositif de freinage de machine-outil
DE102012218197A1 (de) 2012-05-04 2013-11-07 Robert Bosch Gmbh Werkzeugmaschinenbremsvorrichtung
EP3150333A3 (fr) * 2015-09-30 2017-04-26 Chervon (HK) Limited Outil électrique portatif comprenant un ensemble de freinage amélioré
CN107584456A (zh) * 2016-07-06 2018-01-16 苏州宝时得电动工具有限公司 一种摆动机构及多功能机
CN107584456B (zh) * 2016-07-06 2023-10-10 苏州宝时得电动工具有限公司 一种摆动机构及多功能机
DE102016125765A1 (de) 2016-12-28 2018-06-28 Metabowerke Gmbh Elektrohandwerkzeugmaschine
US11554460B2 (en) * 2017-09-19 2023-01-17 Makita Corporation Rotating tool
US11865668B2 (en) 2017-09-19 2024-01-09 Makita Corporation Rotating tool

Also Published As

Publication number Publication date
DE502006007386D1 (de) 2010-08-19
ES2347063T3 (es) 2010-10-25
CN101254588B (zh) 2011-04-27
CN101254588A (zh) 2008-09-03
EP1938924B1 (fr) 2010-07-07
ATE473067T1 (de) 2010-07-15

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