EP0461112B1 - Exzenterschleifer - Google Patents

Exzenterschleifer Download PDF

Info

Publication number
EP0461112B1
EP0461112B1 EP89912898A EP89912898A EP0461112B1 EP 0461112 B1 EP0461112 B1 EP 0461112B1 EP 89912898 A EP89912898 A EP 89912898A EP 89912898 A EP89912898 A EP 89912898A EP 0461112 B1 EP0461112 B1 EP 0461112B1
Authority
EP
European Patent Office
Prior art keywords
eccentric
gear
rim
housing
ring
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
EP89912898A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0461112A1 (de
Inventor
Günther Berger
Karl-Heinz Braunbach
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 EP0461112A1 publication Critical patent/EP0461112A1/de
Application granted granted Critical
Publication of EP0461112B1 publication Critical patent/EP0461112B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 claim 1.
  • Such an eccentric grinder is known from DE PS 36 25 655.
  • This fuse is designed in the form of a friction brake. This requires a significant number of individual parts and high assembly costs.
  • the friction brake is prone to failure and sensitive to dust. Therefore, a high level of sealing technology must be carried out.
  • the reliability of the brake decreases with increasing wear of its individual parts, such as springs and brake pads. Considerable effort is required to repair them.
  • the well-known random orbit sander In hard, professional use, the well-known random orbit sander has the following further disadvantages:
  • the teeth of the roller and cage assemblies are subject to high wear due to the effect of grinding dust.
  • the switchable gear for the additional, medium roughness processing stage requires complicated adjusting means. These are prone to failure and not very robust. If the gear stages are not switched carefully, there is a risk of tooth breakage for the teeth of the gear rings.
  • the eccentric grinder according to the invention with the characterizing features of the main claim has the advantage of high grinding performance in the fine grinding mode with a simple, space-saving construction.
  • the roller and cage assemblies are extremely resistant to mechanical wear and the service life of the gears is significantly increased. The damaging turning up of the sanding plate when idling is prevented in a particularly simple manner.
  • a further developed form of the random orbital sander also has - known per se - operating modes coarse and medium grinding, which are realized in a simple, gentle way by changing the different roller rings carried by the grinding plate.
  • FIG. 1 shows a sectional view of an eccentric grinder
  • FIG. 2 shows a grinding plate with a roller ring with a ring-like friction lining
  • FIG. 3 shows a grinding plate with a rolling ring with a bristled friction lining
  • FIG. 4 shows a grinding plate with a toothed ring consisting of a toothed belt with a rim-like carrier collar.
  • the eccentric sander 1 shown in Figure 1 has an eccentric gear housing 2 for a grinding plate drive and a drive housing 3.
  • the eccentric gear housing 2 is provided with a nozzle 4 for connecting a suction device 5 and flanged to the drive housing 3 by means of screws 6.
  • a drive shaft 7 protrudes from the drive housing 3.
  • the intermediate piece 8 is designed as a crank and has a cylindrical recess 9 mounted eccentrically to the drive shaft 7.
  • the eccentricity, ie the distance between the axis of the drive shaft 7 and the axis of the recess 9, is designated 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 piece 13 and at its free end a threaded hole into which an Allen screw 14 can be screwed.
  • the hexagon piece 13 and a locking washer 15 secure the support pin 11 against axial displacement in the ball bearings 10.
  • the support plate 11 is connected to the grinding plate 12 via the hexagon socket screw 14.
  • This carries a covering 16, for example with a Velcro fastener, which serves to receive a correspondingly designed sanding sheet 17.
  • a rolling ring 18 designed as an internal ring gear is arranged non-rotatably, concentrically with the drive shaft 7.
  • the grinding plate 12 On its end face facing the housing 2, the grinding plate 12 releasably and non-rotatably carries a roller ring 20 designed as an external friction ring, which is aligned concentrically with the axis of the trunnion 11 and thus eccentrically with the drive shaft 7.
  • a roller ring 20 designed as an external friction ring
  • the eccentric grinder works as follows: A motor, not shown, drives the drive shaft 7. This rotates the intermediate piece 8 and allows the support pin 11 held therein eccentrically and with it the grinding plate 12 to rotate about the axis of the drive shaft 7. Due to the freely rotatable mounting of the trunnion 11 in the ball bearings 10, the grinding plate 12 fastened thereon can also be freely rotated.
  • the grinding plate 12 arranged on the support pin 11 When the grinding plate 12 is lifted from a surface to be machined, it rolls with minimal slip with its rolling ring 20 in the rolling ring 18 arranged in a rotationally fixed manner on the eccentric gear housing 2 and forces an additional rotational movement of the grinding plate 12.
  • a rolling ring 20 of the grinding plate 12 is shown in cooperation with the rolling ring 18.
  • the rolling ring 20 is provided with an elastic, ring-like friction lining 21 with knobs 22.
  • FIG. 3 shows the rolling ring 40 with an elastic friction lining 41, equipped with bristles 42, which bring about increased frictional engagement with the rolling ring 38 fixed to the housing, which, however, is limited by the elastic bending of the bristles 42 and subsequent latching.
  • the roller ring 20, 40 is dimensioned such that even with a slight pressure of the grinding plate 12 on a surface to be machined, for example with the weight of the random orbital sander 1, no forced rolling movement of the roller ring 20 , 40 can take place on the rolling ring 18, 38, but that together with the rolling ring 20, 40 the grinding plate 12 rotates eccentrically without rotating.
  • the friction between the rolling ring 20, 40 and the housing-fixed rolling ring 18, 38 is sufficient to force the grinding plate 12 to rotate in a gear ratio of here about 1:60 in relation to the drive shaft 7.
  • the roller ring 50 is a toothed part 51.
  • This is formed from an annular toothed belt 52.
  • This sits on a rim-shaped carrier collar 53 with at least part of its width.
  • the carrier collar 53 supports the inherently flexible, pliable, ring-like toothed belt 52, which can thereby act as a fixed friction wheel, the teeth 54 of which frictionally contact the rolling ring 48 without tooth engagement.
  • Even an additional use of both the tooth sides and the toothed belt back of the toothed belt 52 as a friction ring on a non-toothed counter surface has proven to be advantageous.
  • a rough grinding step can be implemented using a grinding plate (not shown) with an internal ring gear that meshes with an additional, not shown, housing-fixed external ring gear.
  • a machining step middle grinding can be realized in a known manner. A change between coarse, medium and fine sanding is possible by changing the sanding plate with the corresponding roller rings.
  • the invention can be advantageously used for the finishing step.
  • the rolling ring 20, 40, 50 is part of a turning wheel, so that e.g. a toothed belt is arranged on one side and a friction ring in the form of an elastic ring is arranged on the other side.
  • Gearboxes according to the invention are of suitable design, e.g. through positive power transmission, also for the transmission of higher torques, i.e. suitable for forced rotation of the sanding pad under high pressure on surfaces to be processed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Combinations Of Printed Boards (AREA)
  • Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP89912898A 1989-03-02 1989-11-17 Exzenterschleifer Expired - Lifetime EP0461112B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3906549 1989-03-02
DE3906549A DE3906549A1 (de) 1989-03-02 1989-03-02 Exzenterschleifer

Publications (2)

Publication Number Publication Date
EP0461112A1 EP0461112A1 (de) 1991-12-18
EP0461112B1 true EP0461112B1 (de) 1993-02-10

Family

ID=6375280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89912898A Expired - Lifetime EP0461112B1 (de) 1989-03-02 1989-11-17 Exzenterschleifer

Country Status (6)

Country Link
US (1) US5261190A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0461112B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPH04503775A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR8907881A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3906549A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO1990009869A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111520U1 (de) * 1991-09-17 1993-01-28 Werkzeug GmbH, 5441 Weibern Exzenterschleifkopf
GB9123502D0 (en) * 1991-11-06 1992-01-02 Black & Decker Inc Sanding apparatus
DE4206962A1 (de) * 1992-03-05 1993-09-09 Bosch Gmbh Robert Exzentertellerschleifer mit begrenzter drehzahl des schleiftellers
DE4233729A1 (de) * 1992-10-07 1994-04-14 Bosch Gmbh Robert Exzentertellerschleifer mit Schleiftellerbremse
DE4233727A1 (de) * 1992-10-07 1994-04-14 Bosch Gmbh Robert Exzentertellerschleifer
DE4233728A1 (de) * 1992-10-07 1994-04-14 Bosch Gmbh Robert Exzentertellerschleifer
US5518442A (en) * 1993-01-22 1996-05-21 Porter-Cable Corporation Sander
IT1266572B1 (it) * 1993-07-30 1997-01-09 Guido Valentini Congegno per il montaggio e la rimozione manuali di dischi operatori in utensili manuali per la lavorazione di superfici
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
USD378183S (en) * 1994-09-14 1997-02-25 Black & Decker Inc. Small angle grinder
GB9423848D0 (en) * 1994-11-25 1995-01-11 Black & Decker Inc Improved oscillating hand tool
US5595531A (en) * 1995-07-26 1997-01-21 Ryobi North America Random orbit sander having speed limiter
US5582541A (en) * 1995-08-24 1996-12-10 Hutchins Manufacturing Company Abrading tool with water feed and removal system
JP2839080B2 (ja) * 1996-01-31 1998-12-16 ユーエイチティー株式会社 手持ち式研削装置
US5941765A (en) * 1996-11-19 1999-08-24 Porter Cable Corporation Sander
US5885145A (en) * 1997-05-01 1999-03-23 O'mara; John E. Powered drywall sander and painter
USD411089S (en) * 1997-05-23 1999-06-15 Black & Decker Inc. Right angle sander with vacuum attachment
US6062960A (en) * 1998-04-27 2000-05-16 Ryobi North America, Inc. Orbital tool
US5947804A (en) * 1998-04-27 1999-09-07 Ryobi North America, Inc. Adjustable eccentricity orbital tool
US6213851B1 (en) 1998-07-07 2001-04-10 Delta International Machinery Corp. Abrading apparatus
DE10055246A1 (de) * 2000-11-08 2002-05-16 Bosch Gmbh Robert Exzenterschleifer mit einer Vorrichtung zur Drehzahlbegrenzung des Schleiftellers
US6666524B2 (en) * 2001-05-23 2003-12-23 The Gillette Company End-rounding devices and methods for end-rounding
USD490676S1 (en) 2003-03-11 2004-06-01 Black & Decker Inc. Sander
US7824433B2 (en) * 2005-05-03 2010-11-02 Williams Lytton A Bone anchored surgical mesh
DE102006061634A1 (de) 2006-12-27 2008-07-03 Robert Bosch Gmbh Exzenterschleifer
US8100745B2 (en) * 2007-03-16 2012-01-24 Black & Decker Inc. Low vibration sander with a flexible top handle
US20090111364A1 (en) * 2007-10-29 2009-04-30 Jinding Group Co., Ltd. Power tool having an eccentric mass
US8172642B2 (en) * 2008-08-20 2012-05-08 Black & Decker Inc. Multi-sander
CN101890671B (zh) * 2009-02-17 2014-05-28 C.&E.泛音有限公司 用于振动驱动装置的磨削或磨光的工具
JP2012200794A (ja) * 2011-03-23 2012-10-22 Makita Corp 電動工具
DE102011052247A1 (de) * 2011-07-28 2013-01-31 Rolf Tamm Anordnung zum Schleifen von Elektroden
CN104589189B (zh) * 2015-02-02 2017-07-14 浙江金美电动工具有限公司 双轨迹偏心结构抛光机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287859A (en) * 1965-08-23 1966-11-29 Treffle J Leveque Rotatable grinding and surfacing tool
JPS55150964A (en) * 1979-05-04 1980-11-25 Kinichi Takeuchi Grinding device capable of performing combined motion of rotation and circular motion
DE3609441A1 (de) * 1986-03-20 1987-09-24 Bosch Gmbh Robert Exzenterschleifer mit einer vorrichtung zum veraendern der schleifbewegung
DE3615799C2 (de) * 1986-05-10 1994-10-13 Bosch Gmbh Robert Exzenterschleifer mit einer Vorrichtung zum Verändern der Schleifbewegung
DE3625655C1 (de) * 1986-07-29 1988-01-07 Festo Kg Exzentertellerschleifer
DE3642741A1 (de) * 1986-12-13 1988-06-23 Bosch Gmbh Robert Exzenterschleifer

Also Published As

Publication number Publication date
DE3906549C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-07-30
BR8907881A (pt) 1991-12-17
US5261190A (en) 1993-11-16
DE58903553D1 (de) 1993-03-25
DE3906549A1 (de) 1990-09-06
WO1990009869A1 (de) 1990-09-07
EP0461112A1 (de) 1991-12-18
JPH04503775A (ja) 1992-07-09

Similar Documents

Publication Publication Date Title
EP0461112B1 (de) Exzenterschleifer
DE69412050T2 (de) Exzenterschleifmaschine mit Bremskörper
EP0591876B1 (de) Exzentertellerschleifer mit Schleiftellerbremse
EP0245638B1 (de) Exzenterschleifer mit Vorkehrungen zum Verändern der Schleifbewegung
EP0406247B1 (de) Exzenterschleifer
DE19845166B4 (de) Rotationswerkzeug in der Ausführungsform einer Ringscheibe zur Oberflächenbearbeitung
EP0557773B1 (de) Schleifmaschine mit einem Mitnehmer zur Drehmitnahme eines Schleiftellers aus mehreren Werkstoffschichten
DE19900010C2 (de) Spielfreies Reibradgetriebe
DE69004411T2 (de) Polierkopf mit schwingenden Schleifsteinen zum Bearbeiten von Steinmaterialien, insbesondere von Granitplatten.
EP0460133B1 (de) Exzenterschleifmaschine
EP0534108B1 (de) Verfahren zum einseitigen Flächenbearbeiten von Werkstücken
DE10025720C2 (de) Antriebsanordnung mit Freilaufkupplung
DE3624064C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB2145496A (en) Angle drive
US4292765A (en) Machine for abrading outside diameters and the method of making same
DE3304630C2 (de) Arbeitswalze zum magnet-abrasiven Polieren
JP3181580B2 (ja) 偏心研削装置
DE1777055C3 (de) Abrichlring zur Verwendung an Zweischeiben-Läpp- und/oder Honmaschinen
DE424994C (de) Aus mehreren Saetzen bestehendes Reibraederwechsel- und -wendegetriebe
DE10256810A1 (de) Bremseinrichtung für einen Schleifteller und entsprechendes Schleifgerät
WO1984003467A1 (en) Transportable device for reworking the two faces of worn brake discs of motor vehicles
DE921658C (de) Riemenscheibe mit eingebautem Zahnradgetriebe
DE839611C (de) Maschine zum spitzenlosen UEberschleifen bzw. Polieren von geraden und gebogenen Rohren
EP0061086A1 (de) Spindeleinsatz
DE246282C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19901215

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

17Q First examination report despatched

Effective date: 19920521

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

ET Fr: translation filed
REF Corresponds to:

Ref document number: 58903553

Country of ref document: DE

Date of ref document: 19930325

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930226

ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19940207

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19941130

Ref country code: LI

Effective date: 19941130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20021123

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040730

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051117

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061123

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20070116

Year of fee payment: 18

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20071117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071117