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EP0615483B1 - Meuleuse a disque a excentrique - Google Patents

Meuleuse a disque a excentrique Download PDF

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Publication number
EP0615483B1
EP0615483B1 EP93920676A EP93920676A EP0615483B1 EP 0615483 B1 EP0615483 B1 EP 0615483B1 EP 93920676 A EP93920676 A EP 93920676A EP 93920676 A EP93920676 A EP 93920676A EP 0615483 B1 EP0615483 B1 EP 0615483B1
Authority
EP
European Patent Office
Prior art keywords
eccentric
shaft
hollow
gearwheel
disc
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.)
Expired - Lifetime
Application number
EP93920676A
Other languages
German (de)
English (en)
Other versions
EP0615483A1 (fr
Inventor
Walter Barth
Michael Knuth
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 EP0615483A1 publication Critical patent/EP0615483A1/fr
Application granted granted Critical
Publication of EP0615483B1 publication Critical patent/EP0615483B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement

Definitions

  • the invention is based on an eccentric disc grinder according to the preamble of claim 1. From document DE-C-422 285 are the features of the preamble of claim 1 known.
  • EP 406 247 (US Serial No. 566 378) is a Eccentric disc grinder known. Its grinding plate is made by one Motor driven. The rotation of the motor is via an angular gear converted into the working movement resulting from a rotary movement and a circular movement of the grinding plate. The The output shaft of the angular gear is non-rotatable at its free end coupled with an eccentric. This bears a pivot, on the rotationally fixed the grinding disc with an eccentricity "e” for Output shaft is held. The grinding disc circles with the eccentricity "e” around the axis of the output shaft and rotates at the same time as a result of bearing friction and thereby leads the labor movement out.
  • the rolling bearings between the eccentric and the journal are non-uniform loads exposed. This leads to heat development and wear. Furthermore is with the known eccentric disc grinders, which are mostly from Angle grinder constructions come from, the distance between grinding plates and bevel gear big. This makes it special when grinding high bearing forces effective. The vibrations also stress of the sanding plate to a high degree is the physical strength of the operator.
  • FIG. 1 shows an eccentric disc grinder according to the invention
  • FIG 2 shows an enlarged detail according to FIG. 1 with the view of FIG Arrangement of the eccentric shaft carrier with slightly varying function
  • Figure 3 shows a further embodiment of an inventive Eccentric disc grinder.
  • the eccentric disc grinder 1 shown in Figure 1 has a motor housing 3, on which an electrical connection cable 5 and an on and off switch 7 are arranged.
  • an angular drive housing designed housing 9 flanged, which is an upper housing cover 11 carries and one with a grinding plate 13 operatively connected
  • the angle drive 14 consists of a small one Bevel gear 15, which sits on a motor shaft 16 and the engine speed transfers to a large bevel gear 17.
  • the bevel gear 17 surrounds concentrically, rotatably a hollow shaft 19 rotatable about an axis of rotation 18 designed eccentric.
  • the hollow shaft 19 is in the housing 9 in one near the sanding plate and an area distant from the sanding plate in bearings 21, 23 mounted and at the same time forms the output shaft of the angular drive 14.
  • the hollow shaft 19 has a bore 25 which is eccentric to the axis of rotation 18 an axis 26.
  • the axis 26 is spaced parallel to the axis of rotation 18 with the eccentricity "e”.
  • In the eccentric bore 25 is concentric to the axis 26 an eccentric shaft 27 in an upper ball bearing 29 and a lower needle bearing 31.
  • a fan sits in a rotationally fixed manner 33 for dust extraction, which also acts as a leveling compound.
  • the free end of the eccentric shaft 27 carries an elastic coupling 35, for example an injected plastic part. That follows a rotatably arranged nut 37 with a threaded bore 39 on which is screwed onto the grinding plate 13 by means of a bolt 41.
  • the elastic coupling 35 transmits the torsionally and flexibly Force from the eccentric shaft 27 to the grinding plate 13.
  • the grinding plate 13 is with recesses regularly distributed over its surface 43 provided, through which grinding dust is extracted from the workpiece can.
  • the grinding plate 13 follows the movement of the eccentric shaft 27 it is supported by the elastic coupling 35 on the eccentric shaft 27 from.
  • the sanding plate 13 can easily Adjust workpiece surfaces or swivel without tilting the eccentric shaft axis compared to the normal to the workpiece at follow handling of the eccentric disc grinder. Workpieces can do this processed particularly gently, without jerky movements.
  • the arrangement of the roller or needle bearing 31 in the vicinity of the grinding plate 13 and the arrangement of the ball bearing 29 far from the grinding plate 13 between eccentric shaft 27 and hollow shaft 19 improves the efficiency the transmission of motion and increases the life of the eccentric disc grinder 1 compared to the prior art, because the radial and axial bearing forces are absorbed separately and so that they are more manageable.
  • slightly modified eccentric disc grinder 101 illustrates the arrangement of the designed as an angular gear housing Housing 109 with the upper housing cover 111, the one with the not shown Sanding disc operatively connected angle drive 114 with the small bevel gear 115, motor shaft 116 and large bevel gear 117, the hollow shaft 119 encompassed by the bevel gear 117 in a concentric, rotationally fixed manner and bearings 121, 123.
  • the bore 125 which is eccentric to the axis of rotation 118 is particularly good to recognize an axis 126 in which the eccentric shaft is concentric to axis 126 127 in the upper ball bearing 129 and the lower needle bearing 131 is performed.
  • the lower end region of the eccentric shaft 127 is non-rotatable arranged leveling compound 133 without fan and without grinding plate shown. At the upper end area, that meshes with the hollow gear 147 Spur gear 145 shown.
  • FIG. 1 In contrast to the exemplary embodiment in FIG. 1, this is the case in FIG Hollow shaft 119 longer designed so that it at the lower, free end can carry the balancing mass 133.
  • the ring gear 147 Lockable by a locking rod 151, rotatable in a plain bearing 149 arranged on the bevel gear housing 109.
  • Eccentric shaft 127 corresponds to the description of Figure 1. Is the locking rod 151 out of engagement with the locking recess 153 in the hollow gear 147, this can rotate and roll the spur gear Dodge 145 so that it does not turn around its own axis 126 but can only circle around axis 118. This movement will passed on to the grinding plate via the eccentric shaft 127 and means a comparatively lower removal rate than at the same time rotating and rotating grinding disc.
  • FIG. 3 shows another one, which is basically the same as that of FIGS. 1 and 2 Embodiment of an eccentric disc grinder 161 shown.
  • This has a motor housing 162 on which an electrical connection cable 163 and an on and off switch 164 are arranged.
  • a housing 165 configured as an angular gear housing is flanged, one with an angular drive that is operatively connected to a grinding plate 167 168 contains.
  • the angular drive 168 consists of a small bevel gear 169, which on a motor shaft 170 sits and the motor speed on a large bevel gear 171 transmits.
  • the bevel gear 171 grips concentrically, non-rotatably a designed as a hollow shaft 173 rotatable about an axis of rotation 172 Eccentric.
  • the hollow shaft 173 is in the housing 165 in a near the grinding plate Roller or needle bearing 175 and in a ball bearing remote from the grinding wheel 174 stored.
  • the hollow shaft 173 has an axis of rotation 172 eccentric bore 176 with an axis 177.
  • the axis 177 runs spaced parallel to the axis of rotation 172 with the eccentricity "e”.
  • In the eccentric bore 176 is an eccentric shaft concentric to the axis 177 178 in an upper ball bearing 179 and a lower needle bearing 180 led.
  • a balancing mass sits in a rotationally fixed manner 181.
  • the free end of the eccentric shaft 178 carries the Sanding disc 167, which was regularly distributed over its surface Provide recesses 182 through which grinding dust is extracted can.
  • a spur gear is seated on the upper end region of the eccentric shaft 178 in a rotationally fixed manner 183, which meshes with a housing-fixed hollow gear 184.
  • the Hollow gear 184 is axially displaceably mounted in the housing 165 and by means of a switch button 186 via means not shown in detail engageable or disengageable with spur gear 183.
  • roller or needle bearings 175, 180 i.e. the radial Force-absorbing bearing
  • the ball bearings 174, 179 i.e. of the axial forces Bearing
  • far from the grinding plate 167 between eccentric shaft 178 and hollow shaft 173 as well as between eccentric 173 and housing 165 also improved here the efficiency of motion transmission and increases the service life of the eccentric disc grinder 101 compared to the known eccentric disc grinders clear.
  • the adjustment means for changing the processing level or the gear position according to DE-OS 36 02 571 with the housing Hollow gear connected bolts that are in inclined guides or oblique slots in the housing.
  • the ring gear is axially displaced in the slots.
  • the bolt carries at least one clamping or locking device, by tightening them the adjustment means can be determined.

Landscapes

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

Abstract

L'invention concerne une meuleuse à disque à excentrique (1, 101, 161) avec un boîtier (3, 103, 9, 109, 162, 165) constitué en particulier de plusieurs parties, dans lequel un moteur avec un arbre (16, 116, 170) met en mouvement un disque de meulage (13, 113, 167) par l'intermédiaire d'un excentrique (19, 119, 173), excentrique (19, 119, 173) qui entraîne, dans un mouvement circulaire et et de rotation simultanée autour de l'axe (26, 126, 177), le disque de meulage (13, 113, 167) avec une excentricité 'e' autour de l'axe de rotation (18, 118, 172). L'objectif de l'invention est de créer un appareil compact, robuste et d'un maniement commode. Cet objectif est atteint par le fait que l'excentrique se présente comme un arbre creux (19, 119, 173) ouvert à ses deux extrémités avec un orifice excentrique (25, 125, 176) d'où un arbre d'excentrique (27, 127, 178) portant le disque de meulage (13, 113, 167) dépasse à une extrémité au moins.

Claims (8)

  1. Ponceuse à plateau excentrique (1, 101, 161) comportant un boítier (3, 103, 9, 109, 162, 165) notamment en plusieurs parties logeant un moteur avec son arbre (16, 116, 170) entraínant un plateau de ponçage (13, 113, 167) par l'intermédiaire d'un excentrique (19, 119, 173), l'excentrique (19, 119, 173) faisant tourner le plateau de ponçage (13, 113, 167) avec une excentricité ("e") autour d'un axe de rotation (18, 118, 172) et en même temps autour d'un axe (26, 126, 177) excentré de l'excentricité ("e") par rapport à l'axe de rotation (18, 118, 172), selon lequel
    l'excentrique (19, 119, 173) est réalisé sous la forme d'un arbre creux ouvert aux deux extrémités avec un perçage excentrique (25, 125, 176) dont dépasse au moins une extrémité de l'arbre excentrique (27, 127, 178) portant le plateau de ponçage (13, 113, 167),
    et dont l'extrémité de l'arbre excentrique (27, 127, 178) éloignée du plateau de ponçage (13, 113, 167) porte une roue dentée droite (45, 145, 183) roulant contre une roue antagoniste en forme de roue dentée creuse (47, 147, 184) prévue notamment dans le boítier (9, 109, 165),
    caractérisée en ce que
    l'arbre à excentrique (27, 127, 178) est porté dans au moins deux paliers (29, 129, 31, 131, 179, 180) à rotation dans l'arbre creux (19, 119, 173) notamment de manière solidaire axialement, par un palier à rouleaux (31, 131, 180) notamment un palier à aiguilles entre l'arbre creux (19, 119, 173) et l'arbre excentrique (27, 127, 178) à proximité du plateau de ponçage (13, 113, 167) pour recevoir les efforts radiaux et par un palier à billes (29, 129, 179) du côté éloigné du plateau de ponçage (13, 113, 167) pour recevoir les efforts axiaux,
    l'arbre creux (19, 119, 173) portant du côté opposé à celui de la roue dentée droite (45, 145, 173) une masse d'équilibrage (33, 133, 181) notamment d'une masse servant ventilateur, montée solidairement en rotation et
    une roue conique (17, 117, 171) est montée solidairement en rotation sur l'arbre creux (19, 119, 173).
  2. Ponceuse à plateau excentrique selon la revendication 1,
    caractérisée en ce que
    la roue dentée creuse (147) est montée dans le boítier (109) de manière rotative avec un frottement réglable notamment dans un palier lisse (149).
  3. Ponceuse à plateau excentrique selon la revendication 1 ou 2,
    caractérisée en ce que
    la roue à denture droite (45, 145, 173) sert de masse d'équilibrage.
  4. Ponceuse à plateau excentrique selon l'une quelconque des revendications précédentes,
    caractérisée par
    un moyen de blocage (151) permettant d'interdire le mouvement de rotation de la roue dentée creuse (147).
  5. Ponceuse à plateau excentrique selon l'une quelconque des revendications précédentes,
    caractérisée par
    un embrayage élastique (35) entre l'arbre à excentrique (27) et le plateau de ponçage (13).
  6. Ponceuse à plateau excentrique selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la roue dentée creuse (184) peut être coulissée axialement dans une position embrayée et être dégagée par coulissement de cette position par rapport à la roue dentée droite (183) par un moyen de réglage (186).
  7. Ponceuse à plateau excentrique selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    les moyens de réglage sont des goujons reliés solidairement à la roue dentée creuse, ces goujons étant guidés dans des fentes inclinées du boítier.
  8. Ponceuse à plateau excentrique selon la revendication 7,
    caractérisée en ce que
    le goujon porte au moins un dispositif de serrage ou d'encliquetage permettant de bloquer les moyens de réglage par serrage.
EP93920676A 1992-10-07 1993-10-04 Meuleuse a disque a excentrique Expired - Lifetime EP0615483B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4233728A DE4233728A1 (de) 1992-10-07 1992-10-07 Exzentertellerschleifer
DE4233728 1992-10-07
PCT/DE1993/000933 WO1994007654A1 (fr) 1992-10-07 1993-10-04 Meuleuse a disque a excentrique

Publications (2)

Publication Number Publication Date
EP0615483A1 EP0615483A1 (fr) 1994-09-21
EP0615483B1 true EP0615483B1 (fr) 1999-06-09

Family

ID=6469861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93920676A Expired - Lifetime EP0615483B1 (fr) 1992-10-07 1993-10-04 Meuleuse a disque a excentrique

Country Status (7)

Country Link
US (1) US5458533A (fr)
EP (1) EP0615483B1 (fr)
JP (1) JP3288379B2 (fr)
CN (1) CN1088000C (fr)
BR (1) BR9305662A (fr)
DE (2) DE4233728A1 (fr)
WO (1) WO1994007654A1 (fr)

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GB9423848D0 (en) * 1994-11-25 1995-01-11 Black & Decker Inc Improved oscillating hand tool
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US5851141A (en) * 1996-12-09 1998-12-22 Elmore; Ronald W. Elongated orbital power sander
DE19848918A1 (de) * 1998-07-28 2000-02-10 Bernhard Ganser Schleifvorrichtung für gebogene Flächen
US6386961B1 (en) * 1999-07-19 2002-05-14 Thomas D. Cureton Hand held grinder
DE19952108B4 (de) 1999-10-29 2007-09-20 Robert Bosch Gmbh Exzentertellerschleifmaschine
JP4558154B2 (ja) * 2000-07-28 2010-10-06 ケヰテック株式会社 偏心量調整装置
DE10047202A1 (de) 2000-09-23 2002-04-11 Bosch Gmbh Robert Motorgetriebene Handschleifmaschine
DE10104993A1 (de) * 2001-02-03 2002-08-22 Bosch Gmbh Robert Handwerkzeugmaschine zum Schleifen, Polieren oder dergleichen
US6758731B2 (en) * 2001-08-10 2004-07-06 One World Technologies Limited Orbital sander
DE102006054265B3 (de) * 2006-11-17 2008-04-10 Festool Gmbh Handwerkzeugmaschine
DE102007007787A1 (de) * 2007-02-16 2008-08-21 Robert Bosch Gmbh Schleifteller für eine Exzenterschleifmaschine
US20090111364A1 (en) * 2007-10-29 2009-04-30 Jinding Group Co., Ltd. Power tool having an eccentric mass
AT10804U1 (de) * 2009-06-04 2009-10-15 Neustifter Johann Verfahren zum umbau eines verteilergetriebes für mehrere abtriebe
DE102010043185A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Werkzeugmaschinenbremsvorrichtung
DE102011075222A1 (de) * 2011-05-04 2012-11-08 Robert Bosch Gmbh Werkzeugmaschinenbremsvorrichtung
US20120322350A1 (en) * 2011-06-19 2012-12-20 Mr. ROBERT SCHYWALSKY Cordless drywall sander
EP2700473B1 (fr) * 2011-10-26 2018-12-19 Keitech Co., Ltd. Outil de meulage possédant un arbre de rotation excentrique
WO2014083243A1 (fr) * 2012-11-29 2014-06-05 Oy Kwh Mirka Ab Dispositif et procédé de broyage de produits sphériques
CN103862338B (zh) * 2012-12-12 2016-08-17 苏州宝时得电动工具有限公司 具有推杆式止动机构的角磨机
ITVI20130116A1 (it) * 2013-04-23 2014-10-24 Costa Levigatrici Spa Macchina levigatrice multiutensile
CN103286689B (zh) * 2013-05-30 2015-05-27 杨文武 一种偏心抛光机
WO2015164920A1 (fr) * 2014-05-01 2015-11-05 Arbortech Industries Limited Ponceuse orbitale aléatoire
JP6464017B2 (ja) * 2014-05-09 2019-02-06 株式会社マキタ 研磨機
DE102014109904A1 (de) * 2014-07-15 2016-01-21 C. & E. Fein Gmbh Exzenterschleifer
DE102014116598A1 (de) * 2014-11-13 2016-05-19 Vorwerk & Co. Interholding Gesellschaft mit beschränkter Haftung Vorrichtung, Verwendung einer Vorrichtung und Verfahren zur Oberflächenbearbeitung
US20180009084A1 (en) * 2016-07-07 2018-01-11 Stone Pro Equipment Company Abrading Disc
DE102016223508A1 (de) * 2016-11-28 2018-05-30 Robert Bosch Gmbh Tragbare Werkzeugmaschine
CN209408223U (zh) * 2018-01-15 2019-09-20 苏州宝时得电动工具有限公司 打磨工具
DE102018115303A1 (de) * 2018-06-26 2020-01-02 C. & E. Fein Gmbh Getriebekopf und Handwerkzeugmaschine
EP3646987B1 (fr) * 2018-10-29 2023-06-14 Guido Valentini Outil électrique de ponçage ou de polissage orbital aléatoire portatif, guidé à la main
EP3693132B1 (fr) * 2019-02-08 2023-09-06 Guido Valentini Outil électrique de ponçage ou de polissage orbital aléatoire guidé à la main portatif
DE102021111672A1 (de) * 2021-05-05 2022-11-10 Georg Weber Vorrichtung zum Bearbeiten von flächigen Werkstücken

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Also Published As

Publication number Publication date
DE4233728A1 (de) 1994-04-14
CN1086758A (zh) 1994-05-18
US5458533A (en) 1995-10-17
CN1088000C (zh) 2002-07-24
DE59309642D1 (de) 1999-07-15
BR9305662A (pt) 1996-11-26
WO1994007654A1 (fr) 1994-04-14
JPH07501756A (ja) 1995-02-23
EP0615483A1 (fr) 1994-09-21
JP3288379B2 (ja) 2002-06-04

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