EP2556922B1 - Outil manuel à moteur - Google Patents

Outil manuel à moteur Download PDF

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Publication number
EP2556922B1
EP2556922B1 EP11176980.8A EP11176980A EP2556922B1 EP 2556922 B1 EP2556922 B1 EP 2556922B1 EP 11176980 A EP11176980 A EP 11176980A EP 2556922 B1 EP2556922 B1 EP 2556922B1
Authority
EP
European Patent Office
Prior art keywords
eccentric
hand
eccentric lever
tool according
held tool
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.)
Not-in-force
Application number
EP11176980.8A
Other languages
German (de)
English (en)
Other versions
EP2556922A1 (fr
Inventor
Joachim Clabunde
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.)
C&E Fein GmbH and Co
Original Assignee
C&E Fein 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 C&E Fein GmbH and Co filed Critical C&E Fein GmbH and Co
Priority to EP11176980.8A priority Critical patent/EP2556922B1/fr
Priority to CN201210280761.8A priority patent/CN102950584B/zh
Priority to US13/570,483 priority patent/US9227290B2/en
Publication of EP2556922A1 publication Critical patent/EP2556922A1/fr
Application granted granted Critical
Publication of EP2556922B1 publication Critical patent/EP2556922B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • 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 relates to a power-driven hand tool, with a about its longitudinal axis rotationally driven tool spindle, which is designed to receive a tool, with a gear housing in which an eccentric coupling drive is taken for driving the tool spindle and from which the tool spindle protrudes with one end to the outside.
  • Such a hand tool is from the DE-A-10 2007 018 466 known. It is a machine tool with a drive unit for driving a drive shaft and an output shaft on which a tool is received. The rotational movement of the drive shaft can be transmitted to the output shaft via an eccentric coupling device.
  • oscillating drive hand tools can be used for example for cutting or grinding workpieces, the oscillatory movement of the tool can basically allow precise guidance at high cutting and removal rate.
  • the DE-A-10 2007 018 466 to provide a balance device for vibration compensation, which executes one of the oscillatory motion generated by the oscillation oscillatory counteracting compensating movement.
  • the mass balance device requires increased construction costs and a considerable additional weight.
  • the mass balancing device requires a number of movably coupled parts which must be supplied with gear grease to ensure smooth running of the machine. Since the oscillation drive in question is usually operated at high frequency, this results in Walk movements and fatigue stresses that can lead to heating of the tool and adversely affect the efficiency and the life of the machine concerned.
  • a tool with an oscillating driven tool spindle which protrudes out of the housing with one end to the outside, wherein the mass balance of the oscillatory movement outside of the housing a balancing mass is provided.
  • the invention has for its object to provide a power tool for oscillating drive a tool that can be operated with high performance with a reduced vibration load while allowing high efficiency and low component load. Furthermore, a risk of injury to a user of the hand tool should be kept as low as possible.
  • the object of the invention is achieved in this way.
  • the gear housing can be made very compact.
  • the grease space can be kept small, so that the grease requirement can be reduced to a minimum. Power losses of the machine caused by flexing caused by reciprocating grease can be significantly reduced.
  • the eccentric coupling drive comprises a movement reversing device, one of the eccentric coupling drive generated oscillating drive movement in an oscillating drive movement of the tool spindle converts with opposite direction of rotation.
  • the drive movement itself is used to bring about a vibration compensation, in which a part of the components involved in the drive transmission is converted into a movement, that of the movement of the other part of the involved components.
  • a vibration compensation in which a part of the components involved in the drive transmission is converted into a movement, that of the movement of the other part of the involved components.
  • the eccentric coupling drive comprises an eccentric lever, which is pivotally mounted at a first end and is driven at the second end via an eccentric.
  • the tool spindle is preferably driven by means of a rocker arm which engages rotatably on the eccentric lever.
  • the eccentric lever is rotatably connected at its first end with a Exzenterhebelachse which is pivotally mounted in the transmission housing, wherein the balancing weight is received against rotation at least at one of the gear housing protruding end of the Exzenterhebelachse.
  • a pivot bearing is accommodated on the eccentric lever, which is engaged by the rocker arm, which is rotatably connected to the tool spindle.
  • pivot bearing between the tool spindle and the eccentric lever axis is preferably arranged.
  • the pivot bearing comprises a bearing axis accommodated on the eccentric lever, to which a bearing is accommodated, on which the oscillating lever engages.
  • the eccentric lever extends around the tool spindle, wherein a slot is preferably provided on the eccentric lever through which the tool spindle extends.
  • the eccentric coupling drive is driven by a motor via a reduction gear.
  • the eccentric coupling drive could itself be designed for a translation into fast or slow.
  • the transmission between the eccentric coupling drive and the motor can in this case comprise, for example, a spur gear which is driven by a motor pinion of the motor.
  • the balancing mass is received on a side facing away from the eccentric lever side of the Exzenterkoppeltriebs.
  • the balancing mass is dimensioned so that the center of gravity of the moving parts of the Exzenterkoppeltriebs including the balancing mass coincides approximately with a longitudinal axis of an eccentric lever axis about which the eccentric lever is pivotable.
  • Fig. 1 and 2 is an inventive power-driven hand tool dargestelllt in the region of its gear head and generally designated by the numeral 10.
  • the hand tool 10 is an oscillation drive, which is used in particular for grinding or cutting.
  • the hand tool 10 has a machine housing 14, within which a gear housing 12 is provided, in which a tool spindle 26 is mounted, which protrudes with its one end out of the gear housing 12 and the machine housing 14 to the outside.
  • the tool spindle 26 is mounted by means of two bearings 30, 32 and has at its outer end a receptacle 54 on which a tool 52, in this case a grinding tool, is releasably secured.
  • a handle 16 is indicated, on which the hand tool 10 can be held during a work operation.
  • a total of 34 designated eccentric coupling drive is added, which converts the rotary drive movement of a motor 18 in a rotationally oscillating drive movement of the tool spindle 26 about its longitudinal axis 28.
  • the eccentric coupling drive 34 places the tool spindle 26 in an oscillating drive motion at high frequency, about 5,000 to 30,000 oscillations per minute, and with a small tilt angle, about 0.5 ° to 7 °. This rotational oscillatory movement is indicated by a double arrow designated 29.
  • the rotating drive movement of the motor shaft 20 of the motor 18 is first via a spur gear, consisting of a motor pinion 22 at the end of the motor shaft 20 and a spur gear 24, geared.
  • an eccentric 36 is driven, which converts the rotational drive movement of the spur gear 24 in an oscillating movement of an eccentric lever 38 which is pivotally mounted at its opposite end by means of a Exzenterhebelachse 40.
  • a pivot bearing consisting of a bearing shaft 46 and a bearing 48 is received, from which a rocker arm 50 is driven, which is rotatably connected to the tool spindle 26.
  • a balancing mass 56 is provided, which is connected to the two protruding from the gear housing 12 ends of the eccentric lever shaft 40 rotatably connected thereto, which in turn is rotatably connected to the eccentric lever 38.
  • the balancing mass 56 is now dimensioned such that the center of gravity of the moving parts of the eccentric coupling drive 34 including the balancing mass 56 approximately coincides with the longitudinal axis 42 of the eccentric lever axis 40.
  • the balancing mass 56 according to the invention outside of the transmission housing 12 within the space enclosed by the machine housing 40 added.
  • the transmission housing 12 can be made very compact and requires only a very small space that needs to be filled with grease.
  • the size of the gear housing 12 is kept very compact, reduces the volume of the necessary grease filling to a minimum and also significantly reduced the flexing of the grease during operation, whereby heating is counteracted and also a high efficiency is ensured.
  • the balancing mass 56 can be optimally dimensioned in this way in order to achieve an effective vibration reduction, without thereby increasing the size of the gear housing 12.
  • eccentric bearing 37 On the driven by the spur gear 24 eccentric 36 an eccentric bearing 37 is received with a spherical outer ring.
  • the eccentric lever 38 engages with a forked end with two sliding surfaces 62, 64 (see in particular Fig. 3 . 5 ) on the outer ring of the eccentric bearing 37.
  • the eccentric lever 38 has according to Fig. 5 a slot 72 through which the tool spindle 26 extends, so that the tool spindle 26 is not affected by the oscillating movement of the eccentric lever 38.
  • the eccentric lever 38 is pressed at its opposite end of the eccentric 36 with the Exzenterhebelachse 40 and in this way connected thereto secured against rotation.
  • two needle bearings 58, 60 are provided, in which the eccentric lever shaft 40 is pivotally mounted.
  • the bearing axis 46 is pressed into a correspondingly shaped recess 47 of the eccentric lever 38.
  • the bearing axis 46 protrudes from the eccentric lever 38 in the direction of the tool 52 and carries at its outer end a needle bearing 48th
  • the rocker arm 50 On the tool spindle 26 of the rocker arm 50 is secured against rotation, for example by pressing (see Fig. 6 ) and comprises the needle bearing 48 with a fork-shaped end, on which two sliding surfaces 68, 70 are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Transmission Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (14)

  1. Outil manuel à moteur, comprenant une broche d'outil (26) pouvant être entraînée par un mouvement d'oscillation rotative autour de son axe longitudinal (28), laquelle est réalisée de manière à recevoir un outil (52), un boîtier de transmission (12), dans lequel est logé un mécanisme d'entraînement à excentrique (34) pour l'entraînement de la broche d'outil (26) et depuis lequel la broche d'outil (26) fait saillie vers l'extérieur par une extrémité, caractérisé en ce que l'on prévoit pour l'équilibrage de masse du mouvement d'oscillation, une masse d'équilibrage (56) qui est disposée à l'extérieur du boîtier de transmission (12), et en ce que la masse d'équilibrage (56) est disposée dans un espace entouré par un boîtier de machine (14).
  2. Outil manuel selon la revendication 1, caractérisé en ce que le mécanisme d'entraînement à excentrique (34) comprend un dispositif d'inversion du sens de mouvement (44) qui convertit un mouvement d'entraînement d'oscillation produit par le mécanisme d'entraînement à excentrique (34) en un mouvement d'entraînement d'oscillation de la broche d'outil (26) dans un sens inverse de rotation.
  3. Outil manuel selon la revendication 1 ou 2, caractérisé en ce que le mécanisme d'entraînement à excentrique (34) comprend un levier à excentrique (38) qui est monté de manière pivotante à une première extrémité et qui est entraîné à une deuxième extrémité par le biais d'un excentrique (36).
  4. Outil manuel selon la revendication 3, caractérisé en ce que la broche d'outil (26) est entraînée au moyen d'un levier oscillant (50) qui vient en prise de manière mobile en rotation sur le levier à excentrique (38).
  5. Outil manuel selon la revendication 3 ou 4, caractérisé en ce que le levier à excentrique (38) est connecté de manière solidaire en rotation à sa première extrémité à un axe de levier à excentrique (40), qui est monté de manière pivotante dans le boîtier de transmission (12), la masse d'équilibrage (56) étant reçue de manière fixée en rotation au moins à une extrémité de l'axe de levier à excentrique (40) faisant saillie hors du boîtier de transmission (12).
  6. Outil manuel selon la revendication 3, 4 ou 5, caractérisé en ce qu'un palier pivotant (46, 48) est reçu sur le levier à excentrique (38), le levier oscillant (50), qui est connecté de manière solidaire en rotation à la broche d'outil (26), venant en prise sur ce palier pivotant.
  7. Outil manuel selon la revendication 6, caractérisé en ce que le palier pivotant (46, 48) est disposé entre la broche d'outil (26) et l'axe de levier à excentrique (40).
  8. Outil manuel selon la revendication 5, 6 ou 7, caractérisé en ce que le palier pivotant comprend un axe de palier (46) reçu sur le levier à excentrique (38), sur lequel axe est reçu un palier (48), sur lequel vient en prise le levier oscillant (50).
  9. Outil manuel selon l'une quelconque des revendications 3 à 8, caractérisé en ce que le levier à excentrique (38) s'étend autour de la broche d'outil (26).
  10. Outil manuel selon la revendication 9, caractérisé en ce qu'un trou oblong (72) est prévu sur le levier à excentrique (38), à travers lequel trou oblong s'étend la broche d'outil (26).
  11. Outil manuel selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme d'entraînement à excentrique (34) est entraîné par un moteur (18) par le biais d'une transmission, en particulier un réducteur (22, 24).
  12. Outil manuel selon la revendication 11, caractérisé en ce que la transmission comprend un pignon droit (24) qui est entraîné par un pignon de moteur (22) du moteur (18).
  13. Outil manuel selon l'une quelconque des revendications 3 à 12, caractérisé en ce que la masse d'équilibrage (56) est reçue au niveau d'un côté du mécanisme d'entraînement à excentrique (34) opposé au levier à excentrique (38).
  14. Outil manuel selon l'une quelconque des revendications 3 à 13, caractérisé en ce que la masse d'équilibrage (56) est dimensionné de telle sorte que le centre de gravité des pièces mobiles du mécanisme d'entraînement à excentrique (34) y compris la masse d'équilibrage (56) coïncide approximativement avec un axe longitudinal (42) d'un axe de levier à excentrique (40) autour duquel le levier à excentrique (38) peut pivoter.
EP11176980.8A 2011-08-09 2011-08-09 Outil manuel à moteur Not-in-force EP2556922B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP11176980.8A EP2556922B1 (fr) 2011-08-09 2011-08-09 Outil manuel à moteur
CN201210280761.8A CN102950584B (zh) 2011-08-09 2012-08-08 动力驱动手持工具
US13/570,483 US9227290B2 (en) 2011-08-09 2012-08-09 Power-driven hand tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11176980.8A EP2556922B1 (fr) 2011-08-09 2011-08-09 Outil manuel à moteur

Publications (2)

Publication Number Publication Date
EP2556922A1 EP2556922A1 (fr) 2013-02-13
EP2556922B1 true EP2556922B1 (fr) 2014-03-19

Family

ID=44993462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11176980.8A Not-in-force EP2556922B1 (fr) 2011-08-09 2011-08-09 Outil manuel à moteur

Country Status (3)

Country Link
US (1) US9227290B2 (fr)
EP (1) EP2556922B1 (fr)
CN (1) CN102950584B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100085A1 (de) 2013-01-07 2014-07-10 C. & E. Fein Gmbh Oszillierend angetriebene Werkzeugmaschine
US10252441B2 (en) 2013-08-28 2019-04-09 Corning Incorporated System and method for cutting a wet green ceramic article
US10883579B2 (en) * 2013-12-20 2021-01-05 Robert Bosch Tool Corporation Oscillating mechanism for a power tool
DE102014202218A1 (de) * 2014-02-06 2015-08-06 Robert Bosch Gmbh Handwerkzeugmaschine mit einem elektronisch kommutierten Elektromotor
DE102014212794A1 (de) * 2014-07-02 2016-01-07 Robert Bosch Gmbh Oszillationsantriebsvorrichtung
JP6678925B2 (ja) * 2015-12-08 2020-04-15 株式会社マキタ 作業工具
DE102015226029A1 (de) * 2015-12-18 2017-06-22 Robert Bosch Gmbh Motorisch angetriebene Handwerkzeugmaschine
US11642769B2 (en) * 2021-02-22 2023-05-09 Makita Corporation Power tool having a hammer mechanism

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DE7436615U (de) * 1974-11-02 1976-05-06 Robert Bosch Gmbh, 7000 Stuttgart Insbesondere hochtouriger schwingschleifer
SE510972C2 (sv) * 1996-05-07 1999-07-19 Atlas Copco Tools Ab Portabelt kraftverktyg med balanseringsanordning
US6974362B2 (en) * 2002-05-14 2005-12-13 Skf Autobalance Systems Ab System and method for automatically compensating for unbalanced resistance forces
DE102004047795A1 (de) * 2004-09-29 2006-04-06 Robert Bosch Gmbh Schleifhandwerkzeugmaschine, insbesondere Akkuschleifhandwerkzeugmaschine
DE102006060320A1 (de) * 2006-12-20 2008-06-26 Robert Bosch Gmbh Schlagwerk für eine Handwerkzeugmaschine
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CN201511357U (zh) * 2009-09-15 2010-06-23 苏州宝时得电动工具有限公司 摆动动力工具
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Also Published As

Publication number Publication date
EP2556922A1 (fr) 2013-02-13
US9227290B2 (en) 2016-01-05
CN102950584A (zh) 2013-03-06
CN102950584B (zh) 2016-12-28
US20130037290A1 (en) 2013-02-14

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