EP0559020A1 - Ponceuse à plateau excentrique avec vitesse de rotation limitée - Google Patents

Ponceuse à plateau excentrique avec vitesse de rotation limitée Download PDF

Info

Publication number: EP0559020A1
Authority: EP; European Patent Office
Prior art keywords: eccentric; disc; grinding; grinder according; eccentric disc
Prior art date: 1992-03-05
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

EP93102636A

Other languages

German (de)

English (en)

Other versions

EP0559020B1 (fr

Inventor

Steffen Dipl.-Ing. Wünsch

Claus Dipl.-Ing. Kemmner

Karl-Heinz Dipl.-Ing. Braunbach

Klaus Wurst

Thomas Palaver

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.)

1992-03-05

Filing date

1993-02-19

Publication date

1993-09-08

1993-02-19 Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH

1993-09-08 Publication of EP0559020A1 publication Critical patent/EP0559020A1/fr

1997-10-15 Application granted granted Critical

1997-10-15 Publication of EP0559020B1 publication Critical patent/EP0559020B1/fr

2013-02-19 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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 relates to an eccentric disc grinder according to the preamble of claim 1.
US Pat. No. 5,018,314 discloses a generic eccentric disc grinder in which the speed of the grinding disc is limited by lamellar brake elements. Further eccentric disc grinders are known in which the speed of the grinding disc is limited by disk-like friction brake means or magnetic brake means.
the known eccentric disc grinder with friction brake have the disadvantage that the brake friction constantly acts on the grinding disc. Due to the power of the drive motor required to overcome the braking force, the efficiency of the eccentric disc grinder is relatively low. The motor power can never be fully used for the grinding process because part of the drive energy is constantly converted into heat.
the braking force acting on the grinding disc cannot be increased, so that a single machining step is determined with the help of the brake. Different processing stages cannot be set using the brake.
the eccentric disc grinder according to the invention with the characterizing features of claim 1 has the advantage that the braking force acting on the grinding disc can be repeatedly and precisely set variably, that different processing stages from fine grinding to coarse grinding can be set by changing the braking force and that at least in one processing stage the drive energy is fully available for the grinding work.
This solution is structurally particularly simple and robust with little additional weight compared to the prior art.
FIG. 1 shows an eccentric disc grinder with a hose-like, adjustable braking means
FIG. 2 shows another embodiment of the eccentric disc grinder with a ring-like braking means that sits firmly on the grinding disc.
the eccentric disc grinder 1 shown in Figure 1 consists of a housing 3 with a handle 5, in which an on and off switch 7 is arranged.
a motor 9 with an output shaft 13 rotating about a shaft axis 11 is arranged in the interior of the housing 3.
the eccentric carrier 15 and thus at the same time the free end of the output shaft 13 is rotatably mounted in a roller bearing 17 in the gear housing 3.
An eccentric pin 19 is mounted in the eccentric carrier 15 by an amount "e" to the axis 11 and is rotatably mounted about its own axis 21 in a further roller bearing 23.
a grinding plate 25 is arranged in a rotationally fixed manner on the eccentric pin 19, held by a screw 27 which passes through the grinding plate 25 and is screwed into a threaded bore 29 of the eccentric pin 19.
a hose connector 31 is arranged in a manner fixed against rotation and immovably, which with its inner radial surface 32 touches the grinding plate 25 on a grinding plate collar 33.
the hose connector 31 is arranged concentrically to the shaft axis 11, its surface 32 being located at the geometric location of the circular path which the grinding plate collar 33 describes when the drive shaft 13 rotates.
the hose connector 31 is tightly encompassed by a ring 35 on the outside.
the ring 35 is arranged displaceably along the hose connector 31.
a rotary knob 37 which is arranged transversely to the direction of displacement in the housing 3, the ring 35 can be axially adjusted via engagement by means of an eccentric (not specified) and held in its respective position.
the braking effect can be varied in the following way: after starting the motor 9 by actuating the on / off switch 7, the grinding plate 25 is forced into a circular path concentric to the shaft axis, the grinding plate 25 rotating about its axis 21 due to the friction in the further rolling bearing 23 begins. The circular movement and the rotation were superimposed.
the braking force of the hose connector 31 on the grinding plate 25 is relatively low. If the ring 35 is in the position shown close to the grinding wheel, the braking force of the hose connector 31 on the grinding wheel 25 or its collar 33 is significantly increased. As a result, the grinding plate can be braked to such an extent that there is a rolling movement on the inner surface 32 of the hose connector 31, and the grinding plate, as a result of the rolling of the grinding plate collar 33 on the hose connector 31, performs a controlled, powerful self-rotation with which a maximum removal rate, the working position " rough ", is fulfilled.
positions of the ring 35 between the two end positions can be varied continuously between rough and fine sanding.
the eccentric disc grinder shown in FIG. 2 has the same structure as the eccentric disc grinder shown in FIG. For this reason, the same reference numerals as in FIG. 1 are used for FIG. 2, insofar as there is agreement.
the motor 9 can be both a compressed air and an electric motor.
the braking means on the grinding plate 25 consist of a ring made of textile porous, in particular felt-like material, which itself, by means not shown, is fastened to the grinding plate 25 by means of clamping means 41 which hold on to the grinding plate 25 and also by means of support 43 in a bent position on the grinding plate 25.
the brake ring 39 is fastened on the grinding plate 25 in such a way that it constantly touches the housing 3 at its lower free end and thereby brakes the rotation of the grinding plate 25.
the braking effect can be varied by changing the position of the support means 43.
the possibility of displacement and the special design of the support means are not shown in detail and, analogously to the exemplary embodiment according to FIG.
a brake ring according to FIG. 2 is fastened on the grinding plate, which is supported only point by point on an inner radial surface of the housing, the raceway of the inner radial surface being provided with a separate, wear-resistant coating in the region of the support . This improves dust protection and extends the life of the brake media.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

EP93102636A 1992-03-05 1993-02-19 Ponceuse à plateau excentrique avec vitesse de rotation limitée Expired - Lifetime EP0559020B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4206962		1992-03-05
DE4206962A DE4206962A1 (de)	1992-03-05	1992-03-05	Exzentertellerschleifer mit begrenzter drehzahl des schleiftellers

Publications (2)

Publication Number	Publication Date
EP0559020A1 true EP0559020A1 (fr)	1993-09-08
EP0559020B1 EP0559020B1 (fr)	1997-10-15

Family

ID=6453303

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP93102636A Expired - Lifetime EP0559020B1 (fr)	1992-03-05	1993-02-19	Ponceuse à plateau excentrique avec vitesse de rotation limitée

Country Status (2)

Country	Link
EP (1)	EP0559020B1 (fr)
DE (2)	DE4206962A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0591876A1 (fr) *	1992-10-07	1994-04-13	Robert Bosch Gmbh	Ponçeuse à plateau excentrique avec frein du plateau abrasif
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
US5813903A (en) *	1996-03-08	1998-09-29	Amano; Kunio	Sanding apparatus with a brake system
US5885146A (en) *	1995-12-06	1999-03-23	Black & Decker Inc.	Oscillating hand tool
FR2810914A1 (fr) *	2000-06-29	2002-01-04	Bosch Gmbh Robert	Ponceuse a plateau excentrique
GB2371004A (en) *	2000-11-08	2002-07-17	Bosch Gmbh Robert	Eccentric sander with speed limiting device
CN107225477A (zh) *	2017-06-06	2017-10-03	浙江亚特电器有限公司	一种使用安全的圆砂机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19963831B4 (de) *	1999-12-30	2006-04-06	Robert Bosch Gmbh	Exzentertellerschleifer mit einem Gehäuse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0254850A2 (fr) *	1986-07-29	1988-02-03	Festo KG	Meuleuse portative à moteur
WO1990009869A1 (fr) *	1989-03-02	1990-09-07	Robert Bosch Gmbh	Meuleuse excentrique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5018314A (en) *	1989-06-08	1991-05-28	Makita Electric Works, Ltd.	Sander

1992
- 1992-03-05 DE DE4206962A patent/DE4206962A1/de not_active Withdrawn
1993
- 1993-02-19 EP EP93102636A patent/EP0559020B1/fr not_active Expired - Lifetime
- 1993-02-19 DE DE59307524T patent/DE59307524D1/de not_active Expired - Fee Related

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0254850A2 (fr) *	1986-07-29	1988-02-03	Festo KG	Meuleuse portative à moteur
WO1990009869A1 (fr) *	1989-03-02	1990-09-07	Robert Bosch Gmbh	Meuleuse excentrique

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0591876A1 (fr) *	1992-10-07	1994-04-13	Robert Bosch Gmbh	Ponçeuse à plateau excentrique avec frein du plateau abrasif
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
US5885146A (en) *	1995-12-06	1999-03-23	Black & Decker Inc.	Oscillating hand tool
US5813903A (en) *	1996-03-08	1998-09-29	Amano; Kunio	Sanding apparatus with a brake system
FR2810914A1 (fr) *	2000-06-29	2002-01-04	Bosch Gmbh Robert	Ponceuse a plateau excentrique
GB2365807A (en) *	2000-06-29	2002-02-27	Bosch Gmbh Robert	Braking means for an eccentric disk grinding machine
GB2365807B (en) *	2000-06-29	2002-08-28	Bosch Gmbh Robert	An eccentric disk grinding machine with a cylindrical housing
US6503133B2 (en)	2000-06-29	2003-01-07	Robert Bosch Gmbh	Eccentric plate grinding machine with a cylindrical housing
GB2371004A (en) *	2000-11-08	2002-07-17	Bosch Gmbh Robert	Eccentric sander with speed limiting device
GB2371004B (en) *	2000-11-08	2003-01-08	Bosch Gmbh Robert	Eccentric sander having a device for limiting the speed of the sanding plate
CN107225477A (zh) *	2017-06-06	2017-10-03	浙江亚特电器有限公司	一种使用安全的圆砂机

Also Published As

Publication number	Publication date
EP0559020B1 (fr)	1997-10-15
DE4206962A1 (de)	1993-09-09
DE59307524D1 (de)	1997-11-20

Publication	Publication Date	Title
EP0591876B1 (fr)	1998-04-08	Ponçeuse à plateau excentrique avec frein du plateau abrasif
DE69412050T2 (de)	1998-12-03	Exzenterschleifmaschine mit Bremskörper
EP1339528B1 (fr)	2006-06-14	Outil a main comportant un capteur destine a l'emission de signaux lors du remplacement de l'outil a main
DE3885907T2 (de)	1994-03-17	Verfahren und vorrichtung zum flachschleifen von schwungrädern.
EP0591875B1 (fr)	1997-07-16	Ponçeuse à plateau excentrique
EP0906175B1 (fr)	2002-02-27	Machine manuelle
DE4206753A1 (de)	1993-09-09	Exzentertellerschleifer
DE19952108A1 (de)	2001-05-03	Motorgetriebene Handschleifmaschine
WO1999039873A1 (fr)	1999-08-12	Broche de ponçage
EP0559020A1 (fr)	1993-09-08	Ponceuse à plateau excentrique avec vitesse de rotation limitée
DE19510291A1 (de)	1996-09-26	Handwerkzeugmaschine
EP0641621A1 (fr)	1995-03-08	Dispositif d'entraînement rotatif
EP0911116B1 (fr)	2001-12-12	Article de meulage et dispositif de fixation
EP1497081B1 (fr)	2006-08-16	Machine-outil manuelle a arret de rotation de broche
EP0708205A1 (fr)	1996-04-24	Procédé et dispositif de traitement des surfaces de roulement de rails par rectification tangentielle
EP0820838B1 (fr)	2000-08-16	Ponçeuse à plateau excentrique
DE19963831B4 (de)	2006-04-06	Exzentertellerschleifer mit einem Gehäuse
DE19852137A1 (de)	2000-05-18	Motorbetriebene Handschleifmaschine
DE69103676T2 (de)	1994-12-22	Spindelantrieb.
DE2929479A1 (de)	1981-02-05	Einrichtung zum planschleifen von steinflaechen
DE4208615C1 (en)	1993-08-12	Grinding spindle with concentric pot-shaped sliding discs - has inner disc protrusions extending radially between axial protrusions on outer disc
EP1466698B1 (fr)	2007-05-16	Dispositif pour le traitement des surfaces
EP0414958B1 (fr)	1993-09-15	Dispositif de serrage pour machines-outils
CH687963A5 (de)	1997-04-15	Exzentertellerschleifer mit Schleiftellerbremse.
DE10256810A1 (de)	2004-06-24	Bremseinrichtung für einen Schleifteller und entsprechendes Schleifgerät

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