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EP0237854A2 - Ponceuse à excentrique munie d'un dispositif de variation du mouvement de ponçage - Google Patents

Ponceuse à excentrique munie d'un dispositif de variation du mouvement de ponçage Download PDF

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Publication number
EP0237854A2
EP0237854A2 EP87102850A EP87102850A EP0237854A2 EP 0237854 A2 EP0237854 A2 EP 0237854A2 EP 87102850 A EP87102850 A EP 87102850A EP 87102850 A EP87102850 A EP 87102850A EP 0237854 A2 EP0237854 A2 EP 0237854A2
Authority
EP
European Patent Office
Prior art keywords
friction
toothed ring
housing
eccentric
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.)
Granted
Application number
EP87102850A
Other languages
German (de)
English (en)
Other versions
EP0237854B1 (fr
EP0237854A3 (en
Inventor
Günther Berger
Dieter Dörr
Günter Dipl.-Ing. Schaal (FH)
Fred Weinmann
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 EP0237854A2 publication Critical patent/EP0237854A2/fr
Publication of EP0237854A3 publication Critical patent/EP0237854A3/de
Application granted granted Critical
Publication of EP0237854B1 publication Critical patent/EP0237854B1/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 type of the main claim.
  • Such an eccentric grinder is available on the market and published in print in "Technical reports for metalworking" on 3.4. 1983 under the title “Rotex, the new dimension of grinding”.
  • Rotex the new dimension of grinding.
  • an optimal adaptation of such an eccentric grinder to the requirements of practice is not yet possible.
  • 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 involves a relatively large amount of actuating means. 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 grinder 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.
  • the easily detachable connection of a friction or toothed ring serving the forced rolling movement of the grinding plate to the housing of the eccentric sander makes it possible to switch from a pure eccentric drive to driving the grinding plate with a forced rolling movement without additional adjusting means.
  • the friction or toothed ring When the friction or toothed ring is inserted, it comes into operative connection with the friction or toothed ring on the grinding plate and forces a rolling movement from which a cyclic grinding pattern results. If you remove the friction or toothed ring, you get a pure eccentric drive. To do this, only the grinding plate needs to be removed and the friction or toothed ring inserted or removed.
  • Control elements are superfluous. Advantageous further developments and improvements of the eccentric grinder specified in the main claim are possible through the measures listed in the subclaims.
  • the formation of the friction or toothed ring with a friction or toothed ring on each of its two end edges is particularly advantageous. This and the fact that the housing-fixed receptacle can accommodate this friction or toothed ring at its two end edges, both the pure eccentric drive of the grinding plate without inserted friction or toothed ring and the grinding plate drive with a forced rolling movement with two different grinding movements are possible because of the friction - or use a toothed ring by turning 180 0 in two different positions.
  • FIG. 1 shows a section through an eccentric sander equipped in accordance with the invention in the gear and grinding plate area, with an internal ring gear rolling on a housing-fixed external ring gear on the grinding plate
  • FIG. 2 shows a section as in FIG. 1, with an external ring gear rolling on a housing-fixed internal ring gear on the grinding plate.
  • an eccentric grinder 1 has a housing 2 which forms a bell 3.
  • a motor is housed, of which only the drive shaft is shown.
  • This drive shaft 4 protrudes into the interior of the bell 3 and carries an intermediate piece 5.
  • the intermediate piece 5 is designed as a crank and has an eccentric to the drive shaft 4, cylindrical recess 6.
  • the eccentricity that is, the distance between the axis of the drive shaft 4 and the center axis of the recess 6 is denoted by x.
  • two ball bearings are inserted, which receive a support pin 8 for a grinding plate 9.
  • a pot-shaped rotating part 10, a spring washer 11 and a screw 13 screwed into a threaded bore 12 in the support pin 8 serve to fix the grinding plate 9 on the support pin 8.
  • a soft-elastic covering 14 is glued onto the outer end face of the grinding plate 9, which is to accommodate the actual one Sanding sheet 15 is used.
  • the grinding plate 9 On its inner end face, the grinding plate 9 has a double toothed ring 16, which is aligned concentrically with the longitudinal axis of the support pin 8 and thus eccentrically with the drive shaft 4.
  • the double ring gear 16 has an inner ring gear 17 and an outer ring gear 18.
  • a ring gear 19 is intended to interact with the double ring gear 16 and for this purpose with one Outer ring gear 20 and an inner ring gear 21 provided.
  • the receptacle 22 is an annular recess formed in a ring 23 fixed to the housing.
  • the receptacle 22 has an inner ring gear 24 and an outer ring gear 25. They fit the outer ring gear 20 and the inner ring gear 21 of the toothed ring 19, respectively.
  • Resilient edges 26 and 27 are intended to hold the toothed ring 19 in place when it is engaged with one of its ring gears 20 and 21 in the corresponding ring gear 24 or 25 of the receptacle 22 is inserted.
  • an annular slot 28 is additionally introduced into the ring 23 fixed to the housing.
  • the housing-fixed ring 23 is preferably made of an elastic material with a relatively high coefficient of friction and is applied to tabs 29 which have been removed from the bell 3.
  • the housing-fixed ring 23 can be pressed or glued into the bell 3. If the toothed rings 24 and 25 are provided with tooth gaps, for example only every second tooth is formed, the receptacle 22 for the toothed ring 19 becomes less sensitive to dust. The removal of the toothed ring 19 and the reinstallation is thereby facilitated. If the toothed ring 19 is removed from the receptacle 22, the drive of the grinding plate 9 does not necessarily take place for a specific grinding movement but only via the intermediate piece 5 with its eccentric recess 6.
  • the mounting of the trunnion 8 in ball bearings 7 in this recess 6 shows that the grinding plate 9 is freely rotatable about the axis of the trunnion 8. It therefore executes a movement during grinding which follows a cycloid with a superimposed rotary movement, the superimposition of the rotary movement being dependent on the pressure during grinding.
  • the path of every single abrasive grain per eccentric revolution is very small, which results in a very fine micrograph.
  • the removal is correspondingly low. This grinding movement is particularly well suited for grinding gradual transitions. If the toothed ring 19 is inserted into the receptacle 22 in the manner shown in FIG.
  • each abrasive grain of the abrasive sheet 15 fastened on the grinding plate 9 describes a pericycloid in which the rotational movement corresponds to the direction of rotation of the eccentric. This means that the path of the abrasive grains is the greatest per revolution of the eccentric. This grinding movement causes the greatest stock removal and is therefore well suited for rough grinding, but not for grinding fine transitions.
  • the micrograph is correspondingly finer. With this setting, transitions can still be ground well. For fine-tuning, it is advisable to use the gear connection between the double tooth ring 16 and the toothed ring 19 to be removed by removing the toothed ring 19.
  • connection piece 30 designates a connection piece with which suction paths (31) arranged inside the bell (3) can be connected to a dust extraction device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP19870102850 1986-03-20 1987-02-27 Ponceuse à excentrique munie d'un dispositif de variation du mouvement de ponçage Expired - Lifetime EP0237854B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3609441 1986-03-20
DE19863609441 DE3609441A1 (de) 1986-03-20 1986-03-20 Exzenterschleifer mit einer vorrichtung zum veraendern der schleifbewegung

Publications (3)

Publication Number Publication Date
EP0237854A2 true EP0237854A2 (fr) 1987-09-23
EP0237854A3 EP0237854A3 (en) 1988-07-20
EP0237854B1 EP0237854B1 (fr) 1991-09-25

Family

ID=6296878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870102850 Expired - Lifetime EP0237854B1 (fr) 1986-03-20 1987-02-27 Ponceuse à excentrique munie d'un dispositif de variation du mouvement de ponçage

Country Status (4)

Country Link
US (1) US4759152A (fr)
EP (1) EP0237854B1 (fr)
JP (1) JPS62228363A (fr)
DE (2) DE3609441A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0320599A1 (fr) * 1987-12-16 1989-06-21 Festo KG Meuleuse à disque excentrique
ITTV20110026A1 (it) * 2011-02-24 2012-08-25 Luca Toncelli Macchina e mandrino per la levigatura o lucidatura di lastre di materiale lapideo o litoide.
WO2016008631A1 (fr) * 2014-07-15 2016-01-21 C. & E. Fein Gmbh Ponceuse à excentrique pourvue de deux entraînements
WO2020212552A1 (fr) 2019-04-19 2020-10-22 Ferrobotics Compliant Robot Technology Gmbh Dispositif servant au traitement assisté par robot de surfaces

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3642741A1 (de) * 1986-12-13 1988-06-23 Bosch Gmbh Robert Exzenterschleifer
DE3809930A1 (de) * 1988-03-24 1989-10-05 Bosch Gmbh Robert Exzenterschleifer
US4965965A (en) * 1988-07-06 1990-10-30 Wallin Sven E Grinding head for surfacing and polishing stone, marbles and other hard materials
DE3906549A1 (de) * 1989-03-02 1990-09-06 Bosch Gmbh Robert Exzenterschleifer
DE3917603A1 (de) * 1989-05-31 1990-12-06 Hilti Ag Bohrvorrichtung fuer hinterschnitt
US5018314A (en) * 1989-06-08 1991-05-28 Makita Electric Works, Ltd. Sander
DE3942301C1 (fr) * 1989-12-21 1991-02-14 Robert Bosch Gmbh, 7000 Stuttgart, De
US5081794A (en) 1990-08-17 1992-01-21 Haney Donald E Sander with orbiting platen and abrasive
US7004818B1 (en) 1990-08-17 2006-02-28 Haney Donald E Sander with orbiting platen and abrasive
EP0517594B1 (fr) * 1991-06-06 1995-12-13 Commissariat A L'energie Atomique Machine de polissage à bande microabrasive tendue et à tête support de plaquette perfectionnée
GB9123502D0 (en) * 1991-11-06 1992-01-02 Black & Decker Inc Sanding apparatus
JP3063872B2 (ja) * 1992-06-08 2000-07-12 株式会社マキタ 研磨機
DE4233728A1 (de) * 1992-10-07 1994-04-14 Bosch Gmbh Robert Exzentertellerschleifer
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
US5595531A (en) * 1995-07-26 1997-01-21 Ryobi North America Random orbit sander having speed limiter
US5941765A (en) * 1996-11-19 1999-08-24 Porter Cable Corporation 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
DE10134308A1 (de) * 2001-07-14 2003-01-30 Bosch Gmbh Robert Handwerkzeugmaschine
US7198557B2 (en) * 2001-08-02 2007-04-03 Haney Donald E Sanding machine incorporating multiple sanding motions
US8100745B2 (en) * 2007-03-16 2012-01-24 Black & Decker Inc. Low vibration sander with a flexible top handle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE733899C (de) * 1938-05-06 1943-04-05 Niles Werke Ag Deutsche Maschine zum Polieren von Messflaechen, insbesondere an Rachenlehren
US2794303A (en) * 1955-06-16 1957-06-04 David R Wickes Power-driven hand tool
US3482362A (en) * 1966-01-28 1969-12-09 Ingersoll Rand Co Double acting sander head
DE2316286A1 (de) * 1973-03-31 1974-10-17 Bosch Gmbh Robert Schwingschleifer
JPS55150964A (en) * 1979-05-04 1980-11-25 Kinichi Takeuchi Grinding device capable of performing combined motion of rotation and circular motion
FR2529497A1 (fr) * 1982-07-02 1984-01-06 Black & Decker Inc Perfectionnement aux outils portables a plateau vibrant, notamment aux ponceuses vibrantes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0320599A1 (fr) * 1987-12-16 1989-06-21 Festo KG Meuleuse à disque excentrique
ITTV20110026A1 (it) * 2011-02-24 2012-08-25 Luca Toncelli Macchina e mandrino per la levigatura o lucidatura di lastre di materiale lapideo o litoide.
WO2016008631A1 (fr) * 2014-07-15 2016-01-21 C. & E. Fein Gmbh Ponceuse à excentrique pourvue de deux entraînements
WO2020212552A1 (fr) 2019-04-19 2020-10-22 Ferrobotics Compliant Robot Technology Gmbh Dispositif servant au traitement assisté par robot de surfaces

Also Published As

Publication number Publication date
EP0237854B1 (fr) 1991-09-25
DE3773235D1 (de) 1991-10-31
DE3609441A1 (de) 1987-09-24
EP0237854A3 (en) 1988-07-20
JPS62228363A (ja) 1987-10-07
US4759152A (en) 1988-07-26

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