EP0245638A2 - Ponceuse à excentrique munie de moyens pour modifier le mouvement de ponçage - Google Patents

Ponceuse à excentrique munie de moyens pour modifier le mouvement de ponçage Download PDF

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Publication number
EP0245638A2
EP0245638A2 EP19870104742 EP87104742A EP0245638A2 EP 0245638 A2 EP0245638 A2 EP 0245638A2 EP 19870104742 EP19870104742 EP 19870104742 EP 87104742 A EP87104742 A EP 87104742A EP 0245638 A2 EP0245638 A2 EP 0245638A2
Authority
EP
European Patent Office
Prior art keywords
grinding
friction
eccentric
housing
drive shaft
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
EP19870104742
Other languages
German (de)
English (en)
Other versions
EP0245638A3 (en
EP0245638B1 (fr
Inventor
Helmut Schneider
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 EP0245638A2 publication Critical patent/EP0245638A2/fr
Publication of EP0245638A3 publication Critical patent/EP0245638A3/de
Application granted granted Critical
Publication of EP0245638B1 publication Critical patent/EP0245638B1/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 grinder according to the preamble of the main claim.
  • Such an eccentric grinder is available on the market and published in print in "Technical reports for metalworking" on April 3, 1983 under the title “Rotex, the new dimension of grinding”.
  • the jump between real rough grinding and fine grinding is too big.
  • it is obvious to provide a further gear stage with changed diameters of the friction or gear wheels but this is only conceivable in the known manner with a considerable enlargement of the gear part of the eccentric grinder.
  • switching from one type of drive to another entails a relatively large increase in actuators. These have to be robust for construction site operation and therefore have to be designed to be large enough, but still remain prone to failure. When using sprockets, their teeth can be damaged if they are handled carelessly when switching.
  • the eccentric sander according to the invention with the characterizing features of the main claim has the advantage of optimal grinding performance with the simplest, space-saving construction. It is also ensured in the simplest way that the correct type of grinding wheel is always assigned the correct grinding wheel hardness and the correct sanding sheet grit.
  • assigning a grinding plate to the type of grinding by means of the design of this grinding plate with or that friction or toothed ring or without such a friction or toothed ring, only the grinding plate needs to be replaced.
  • the desired drive type, the required sanding pad hardness and the sanding sheet grit are set in a single change.
  • the grit of the sanding sheet with which the sanding plate is coated gives the specialist information about the type of sanding selected with the use of this sanding plate (coarse, medium, fine).
  • the grit of the sanding sheet with which the sanding plate is coated gives the specialist information about the type of sanding selected with the use of this sanding plate (coarse, medium, fine).
  • FIG. 1 shows a view of an eccentric grinder equipped according to the invention, cut in the gearbox and grinding plate area
  • FIG. 2 shows a view and a partial section as in FIG.
  • An eccentric grinder 1 has a housing 2 for a grinding plate drive.
  • a motor housing 3 The housing 2 is provided with a nozzle 4 for attaching a suction device 5.
  • the housing 2 is flanged to the motor housing 3 and fastened there by means of screws 6.
  • a drive shaft 7 protrudes from the motor housing 3.
  • An intermediate piece 8 is screwed onto this.
  • the intermediate piece 8 is designed as a crank and has a cylindrical recess 9 mounted eccentrically to the drive shaft 7.
  • the eccentricity i.e. the distance between the longitudinal axis of the drive shaft 7 and the longitudinal axis of the recess 9 is denoted by e.
  • two ball bearings 10 are inserted, which receive a support pin 11 for a grinding plate 12.
  • the support pin 11 has a hexagon 13 and a threaded bore into which an Allen screw 14 can be screwed.
  • the hexagon 13 and a locking washer 15 secure the trunnion 11 against axial displacement in the ball bearings 10.
  • the grinding plate 12 is connected to the trunnion 11 by means of the Allen screw (screw with hexagon socket). It carries a glued-on, soft-elastic covering 16 which serves to receive an abrasive sheet 17.
  • the housing 2 is provided with an inner ring gear 18 and an outer ring gear 19. These sprockets 18 and 19 are arranged concentrically with the drive shaft 7.
  • the grinding plate 12 shown in FIG. 1 has an external toothed ring 20 which is aligned concentrically with the longitudinal axis of the trunnion 11 and thus eccentrically with the drive shaft 7.
  • each abrasive grain on the grinding sheet 17 describes an elongated hypocycloid, which moves against the direction of rotation of the eccentric. This results in a greater removal than with grinding without a forced rolling movement.
  • the grinding pattern lies approximately in the middle between rough grinding and fine grinding.
  • the grinding takes place without forced rolling movement, i.e. with a grinding plate, not shown, without sprocket.
  • This grinding plate is driven solely via the intermediate piece 8 with its eccentric recess 9.
  • This grinding plate is freely rotatable on this support pin 11.
  • This grinding plate consequently performs a movement that a cycloid carries out during grinding superimposed rotary motion follows.
  • the superimposition of the rotary movement depends on the pressure when grinding.
  • the path of each individual abrasive grain per eccentric revolution is very small, which results in a very fine grinding pattern.
  • the removal is correspondingly low.
  • This grinding movement is particularly well suited for grinding gradual transitions.
  • a grinding plate 21 shown in FIG. 2 has an internal ring gear 22 which is intended to interact with the external ring gear 19 on the housing 2. Otherwise, the grinding plates 21 and 12 are the same.
  • each of these grinding plates can expediently be equipped with a correspondingly grained grinding sheet 17.
  • the hardness of the covering 16 should also vary depending on the grinding pattern, the correspondingly harder or softer covering can also be assigned to the respective grinding plate.
  • the overall result of the solution according to the invention is that the best grinding movement, the best surface hardness and the best grain size can be selected on the grinding sheet for each intended grinding with the grinding plate. That is optimal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP87104742A 1986-05-10 1987-03-31 Ponceuse à excentrique munie de moyens pour modifier le mouvement de ponçage Expired - Lifetime EP0245638B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3615799 1986-05-10
DE3615799A DE3615799C2 (de) 1986-05-10 1986-05-10 Exzenterschleifer mit einer Vorrichtung zum Verändern der Schleifbewegung

Publications (3)

Publication Number Publication Date
EP0245638A2 true EP0245638A2 (fr) 1987-11-19
EP0245638A3 EP0245638A3 (en) 1990-01-31
EP0245638B1 EP0245638B1 (fr) 1992-09-23

Family

ID=6300566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104742A Expired - Lifetime EP0245638B1 (fr) 1986-05-10 1987-03-31 Ponceuse à excentrique munie de moyens pour modifier le mouvement de ponçage

Country Status (4)

Country Link
US (1) US4754575A (fr)
EP (1) EP0245638B1 (fr)
JP (1) JPH0710491B2 (fr)
DE (2) DE3615799C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413956A3 (en) * 1989-08-23 1991-04-24 Robert Bosch Gmbh Hand tool with grinding disc

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620136C5 (de) * 1986-06-14 2007-01-11 Robert Bosch Gmbh Motorisch angetriebene Handschleifmaschine mit einem Exzenterantrieb
DE3805962A1 (de) * 1988-02-25 1989-09-07 Festo Kg Tellerschleifmaschine
JPH0750141Y2 (ja) * 1988-05-12 1995-11-15 宏明 安田 研磨用具
JP3181580B2 (ja) * 1989-03-02 2001-07-03 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 偏心研削装置
DE3906549A1 (de) * 1989-03-02 1990-09-06 Bosch Gmbh Robert Exzenterschleifer
JP2523147Y2 (ja) * 1990-04-27 1997-01-22 株式会社マキタ 研磨機
DE3926942A1 (de) * 1989-08-14 1991-02-21 Werner Blume Vorrichtung zum aufrauhen und/oder entfernen von insbesondere wand- und fussbodenbelaegen
DE3942301C1 (fr) * 1989-12-21 1991-02-14 Robert Bosch Gmbh, 7000 Stuttgart, De
DE9003410U1 (de) * 1990-03-23 1990-06-28 Nied, Hans Rainer, 8760 Miltenberg Handschleifmaschine
US7004818B1 (en) 1990-08-17 2006-02-28 Haney Donald E Sander with orbiting platen and abrasive
US5081794A (en) 1990-08-17 1992-01-21 Haney Donald E Sander with orbiting platen and abrasive
USD332560S (en) 1990-12-26 1993-01-19 Nitto Kohki Co., Ltd. Portable disk grinder
GB9123502D0 (en) * 1991-11-06 1992-01-02 Black & Decker Inc Sanding apparatus
US5518442A (en) * 1993-01-22 1996-05-21 Porter-Cable Corporation Sander
US5392568A (en) * 1993-12-22 1995-02-28 Black & Decker Inc. Random orbit sander having braking member
US5580302A (en) * 1994-02-28 1996-12-03 Black & Decker Inc. Random orbit sander having air directing baffle
GB9415011D0 (en) * 1994-07-26 1994-09-14 Black & Decker Inc Improved oscillating hand tool
US5649367A (en) * 1996-05-16 1997-07-22 Blount, Inc. Chain saw guide bar with identifying indicia
US5941765A (en) * 1996-11-19 1999-08-24 Porter Cable Corporation Sander
USD416459S (en) 1997-11-15 1999-11-16 Black & Decker Inc. Sander
US6213851B1 (en) 1998-07-07 2001-04-10 Delta International Machinery Corp. Abrading apparatus
DE19963831B4 (de) * 1999-12-30 2006-04-06 Robert Bosch Gmbh Exzentertellerschleifer mit einem Gehäuse
GB2380151B (en) * 2001-07-20 2004-09-22 Black & Decker Inc Oscillating hand tool
US7198557B2 (en) * 2001-08-02 2007-04-03 Haney Donald E Sanding machine incorporating multiple sanding motions
CN100427269C (zh) * 2005-04-01 2008-10-22 王复春 一种双向旋转多功能抛光机
US7029385B1 (en) * 2005-07-27 2006-04-18 Fu-Chun Wang Two-way rotary multi-function polisher
DE102007007787A1 (de) * 2007-02-16 2008-08-21 Robert Bosch Gmbh Schleifteller für eine Exzenterschleifmaschine
US8100745B2 (en) * 2007-03-16 2012-01-24 Black & Decker Inc. Low vibration sander with a flexible top handle
US8172642B2 (en) 2008-08-20 2012-05-08 Black & Decker Inc. Multi-sander
US9421682B2 (en) 2011-07-18 2016-08-23 Black & Decker Inc. Multi-head power tool with reverse lock-out capability
US9956677B2 (en) 2013-05-08 2018-05-01 Black & Decker Inc. Power tool with interchangeable power heads
DE102014109904A1 (de) 2014-07-15 2016-01-21 C. & E. Fein Gmbh Exzenterschleifer
US10414014B2 (en) 2017-09-19 2019-09-17 Campbell Hausfeld, Llc Multifunction rotary tool including driveshaft
US10603760B2 (en) 2017-09-19 2020-03-31 Campbell Hausfeld, Llc Multifunction rotary tool including hub
CN115703199A (zh) * 2021-08-09 2023-02-17 鼎朋企业股份有限公司 轨道运动研磨机的研磨盘稳定结构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857206A (en) * 1973-03-08 1974-12-31 Nat Detroit Inc Co Compound motion rubbing machine
DE2938704C2 (de) * 1979-09-25 1984-03-15 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Exzentertellerschleifer
US4705038A (en) * 1985-01-23 1987-11-10 Dyonics, Inc. Surgical system for powered instruments

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413956A3 (en) * 1989-08-23 1991-04-24 Robert Bosch Gmbh Hand tool with grinding disc

Also Published As

Publication number Publication date
DE3781829D1 (de) 1992-10-29
US4754575A (en) 1988-07-05
JPS62277260A (ja) 1987-12-02
JPH0710491B2 (ja) 1995-02-08
DE3615799A1 (de) 1987-11-12
EP0245638A3 (en) 1990-01-31
DE3615799C2 (de) 1994-10-13
EP0245638B1 (fr) 1992-09-23

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