EP0525328A1 - Meuleuse à ecxentrique - Google Patents

Meuleuse à ecxentrique Download PDF

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Publication number
EP0525328A1
EP0525328A1 EP92109038A EP92109038A EP0525328A1 EP 0525328 A1 EP0525328 A1 EP 0525328A1 EP 92109038 A EP92109038 A EP 92109038A EP 92109038 A EP92109038 A EP 92109038A EP 0525328 A1 EP0525328 A1 EP 0525328A1
Authority
EP
European Patent Office
Prior art keywords
grinding plate
housing
eccentric
grinder according
grinding
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.)
Withdrawn
Application number
EP92109038A
Other languages
German (de)
English (en)
Inventor
Albrecht Siedler
Steffen Dipl.-Ing. Wünsch
Werner Dipl.-Ing. Neubert (Fh)
Claus Dipl.-Ing. Kemmner
Vinzenz Dipl.-Ing. Härle (FH)
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 EP0525328A1 publication Critical patent/EP0525328A1/fr
Withdrawn legal-status Critical Current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
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • B24B23/046—Clamping or tensioning means for abrasive sheets

Definitions

  • the invention relates to an eccentric grinder of the type defined in the preamble of claim 1.
  • the grinding plate is only caused to rotate by the bearing friction and can, if this is significantly greater than the frictional force acting on the grinding surface of the grinding plate, turn up to the speed of the output shaft of the drive motor.
  • the eccentric sander according to the invention with the characterizing features of claim 1 has the advantage that an eccentric sander can be converted into an orbital sander by simple accessories.
  • the usually round sanding plate of an eccentric sander is used by a sanding plate with at least one discontinuity in the plate contour, e.g. a triangular or rectangular plate, corner grinding is possible with the random orbital sander. This opens up another area of application for the random orbit sander.
  • the eccentric sander shown in side view and partially in section in FIG. 1 has a housing 10 from which a handle 11, preferably in one piece, projects approximately at a right angle.
  • a hand guard bracket 12 extends approximately parallel and at a distance from it, which extends from the free end of the handle 11 and merges into the housing 10.
  • a grip bar 14 is used to switch a rotating drive motor accommodated in the housing 10 on and off. Only the output shaft 15 of the drive motor can be seen in FIG. 1.
  • An eccentric 16 sits on the output shaft 15 in a rotationally fixed manner and is rotatably mounted in the housing 10 with a bearing journal 161 via a radial bearing 17.
  • the axis of rotation of the eccentric 16 is aligned with the axis of the output shaft 15.
  • the eccentric 16 On the side facing away from the radial bearing 17, the eccentric 16 has a recess 18 in which a second radial bearing 19 is received, which is used for the rotatable mounting of a grinding plate holder 20.
  • the axis of the second radial bearing 19 and thus the axis of rotation of the grinding plate receptacle 20 in the eccentric 16 is offset relative to the aligned axes of rotation of the eccentric 16 and output shaft 15 by an eccentricity e (cf. also FIGS.
  • a grinding plate 21 is detachably fastened to the grinding plate receptacle 20, for which purpose the grinding plate 21 has a central recess 23 through which a support bracket 22 (FIG. 2) extends.
  • a fastening screw 24 is passed through a corresponding bore in the mounting bracket 22 and screwed into a threaded bore 25 in the grinding plate receptacle 24 that is coaxial with the axis of rotation of the grinding plate receptacle 20.
  • Pins 35 projecting on the underside of the grinding plate receptacle 20 positively engage through corresponding recesses in the mounting bracket 22 and fix the grinding plate 20 to the grinding plate receptacle 20 in a non-rotatable manner.
  • the grinding plate 21 is made of plastic, and when the grinding plate 21 is molded, the support bracket 22 is also inserted is injected.
  • the grinding plate 21 carries, in a known manner, means for the interchangeable attachment of a grinding surface, such as sandpaper or the like.
  • the rotation of the output shaft 15 causes the eccentric 16 to rotate about its axis of rotation aligned with the output shaft 15.
  • the grinding plate receptacle 20 and thus the grinding plate 21 are set in a circular reciprocating movement, the grinding plate 21 being carried along to the rotary movement via the bearing friction in the second radial bearing 19. This rotary movement of the grinding plate 21 is then prevented when the contact pressure of the grinding plate 21 on the workpiece is substantially greater than the bearing friction.
  • This eccentric grinder can be converted into an orbital or vibratory grinder by means of an additional device 26.
  • the additional device 26 is designed so that the grinding plate 21 is non-rotatably fixed to the housing 10 without impeding its displacement by the eccentric 16.
  • the additional device 26 thus only prevents the rotational movement of the grinding plate 21 excited by the bearing friction.
  • the additional device 26 shown in FIG. 1 has a vibrating element 27 made of an elastic material, e.g.
  • the vibrating element 27 has an axial extensibility which is greater than twice the eccentricity e between the axes of rotation of the eccentric 16 and the grinder seat 20. If a vibrating element 27 with less extensibility is used, then in at least one of the two receptacles 28, 29 an axial displaceability of the Vibrating element 27 are provided.
  • a steel spring can also be used as the oscillating element 27.
  • the grinding plate 21 does not have a circular shape, as in the conventional eccentric grinder, but an outer contour with at least one discontinuity, such as a tip or corner.
  • 5 shows various embodiments of the grinding plate 21.
  • the grinding plate 21 can be triangular with straight side edges (Fig. 5a) or convex side edges (Fig.5b) or rectangular (Fig. 5c).
  • the grinding plate 21 can also have a circular shape with a tip formed tangentially thereon (FIG. D). Due to the tips or corners on the grinding plate 21, the area of application of the converted eccentric grinder can be extended to corner grinding.
  • the grinding surface 30 is usually arranged on the underside of the grinding plate 21 facing away from the housing 10 and thereby covers the entire available underside (FIGS. 5a, 5b, 5c).
  • an additional grinding surface 30 ' can also be provided on the upper side of the grinding plate 21 facing the housing 10, and only in the area which protrudes beyond the housing 10. 5d, only one grinding surface 30 "is provided exclusively in the front area of the underside of the grinding plate 21.
  • the grinding surfaces 30, 30 ', 30" are indicated schematically in FIG. 5 by a brush-like structure.
  • the eccentric sander shown in detail in FIG. 4, which is also converted to an orbital sander by the additional device 26, is constructed identically to the eccentric sander described in FIG. 1, so that the same components are provided with the same reference numerals.
  • a modification consists in the design of the additional device 26 for the non-rotatable fixing of the grinding plate 21 on the housing 10. This has a guide bracket 31 fastened to the housing 10, which has a long leg 311 fastened to the housing 10 by means of a screw 32 and one bent at right angles, parallel to Sanding disc 21 extending short leg 312.
  • an elongated hole 33 is made, the maximum clear width of which is greater than twice the eccentricity e between the axes of rotation of the eccentric 16 or the output shaft 15 and the grinding plate receptacle 20.
  • the additional device 26 also includes a pin 34 fastened to the grinding plate 21, protrudes at right angles from the upper side of the grinding plate 21 facing the housing 10 and protrudes into the elongated hole 33 in the short leg 312 of the guide bracket 31.
  • the diameter of the pin 34 is dimensioned slightly smaller than the clear width of the elongated hole 33 transverse to its maximum extent, so that the pin 34 is guided in the elongated hole 33 with little play. Similar to the illustration in FIG.
  • the grinding plate 21 has a circular shape with a tip formed tangentially thereon, the tip of which, forming the tip, is identified by A in the top view in FIG. 3. Furthermore, the guide angle 31 with elongated hole 33 and pin 34 guided therein can be seen in FIG. 3. When the drive motor is switched on, the grinding plate 21 executes a circular back and forth movement, the point A describing a trajectory curve as shown in FIG. 4.
  • the distances a, b, c and d are shown in Fig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP92109038A 1991-06-05 1992-05-29 Meuleuse à ecxentrique Withdrawn EP0525328A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914118392 DE4118392B4 (de) 1991-06-05 1991-06-05 Exzenterschleifer
DE4118392 1991-06-05

Publications (1)

Publication Number Publication Date
EP0525328A1 true EP0525328A1 (fr) 1993-02-03

Family

ID=6433208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109038A Withdrawn EP0525328A1 (fr) 1991-06-05 1992-05-29 Meuleuse à ecxentrique

Country Status (2)

Country Link
EP (1) EP0525328A1 (fr)
DE (1) DE4118392B4 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4314799A1 (de) * 1993-05-05 1994-11-10 Fein C & E Elektrowerkzeug
EP0688632A3 (fr) * 1994-06-20 1996-03-20 Guido Valentini Ponceuse portable munie d'un moteur électrique autoporté
EP0719616A1 (fr) * 1994-12-24 1996-07-03 Black & Decker Inc. Outil vibrant portatif perfectionné
US6179696B1 (en) 1998-04-29 2001-01-30 Black & Decker Inc. Powered oscillating hand tool
CN1088001C (zh) * 1994-07-26 2002-07-24 布莱克-德克尔公司 改进的手持振动工具
EP1745887A1 (fr) 2005-07-21 2007-01-24 Positec Power Tools (Suzhou) Co., Ltd. Outil de ponçage
CN100577359C (zh) * 2005-07-21 2010-01-06 苏州宝时得电动工具有限公司 多功能砂光机
EP2366495A1 (fr) 2010-03-19 2011-09-21 Festool GmbH Machine-outil manuelle dotée d'un engrenage excentrique et d'un verrou
EP2366496A1 (fr) * 2010-03-19 2011-09-21 Festool GmbH Machine-outil manuelle dotée d'une poignée
EP2366493A1 (fr) 2010-03-19 2011-09-21 Festool GmbH Machine-outil manuelle dotée d'un engrenage excentrique comprenant un moyen de guidage à angle de rotation
CN106625140A (zh) * 2015-10-29 2017-05-10 南京德朔实业有限公司 砂光机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567785A1 (fr) * 1984-07-20 1986-01-24 Coponat Robert Ponceuse pour decaper les lames de persiennes
WO1987002924A1 (fr) * 1985-11-15 1987-05-21 C. & E. Fein Gmbh & Co. Meuleuse portative
EP0333933A1 (fr) * 1988-03-22 1989-09-27 Maeda Kiko Company Limited Appareil de ponçage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8529158D0 (en) * 1985-11-27 1986-01-02 Product & Dev Network For Nort Wall covering stripper
DE3742531A1 (de) * 1987-12-16 1989-06-29 Festo Kg Exzentertellerschleifer
DE3805926C2 (de) * 1988-02-25 1996-04-18 Bosch Gmbh Robert Motorisch angetriebenes Handaggregat mit oszillierender Werkzeugbewegung
DE3935179A1 (de) * 1989-10-23 1991-04-25 Werkzeug Gmbh Vorsatzgeraet fuer einen winkelschleifer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567785A1 (fr) * 1984-07-20 1986-01-24 Coponat Robert Ponceuse pour decaper les lames de persiennes
WO1987002924A1 (fr) * 1985-11-15 1987-05-21 C. & E. Fein Gmbh & Co. Meuleuse portative
EP0333933A1 (fr) * 1988-03-22 1989-09-27 Maeda Kiko Company Limited Appareil de ponçage

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5441450A (en) * 1993-05-05 1995-08-15 C.&E. Fein Gmbh & Co. Power tool having means to switch from oscillatory movement to rotary movement
DE4314799A1 (de) * 1993-05-05 1994-11-10 Fein C & E Elektrowerkzeug
EP0688632A3 (fr) * 1994-06-20 1996-03-20 Guido Valentini Ponceuse portable munie d'un moteur électrique autoporté
CN1088001C (zh) * 1994-07-26 2002-07-24 布莱克-德克尔公司 改进的手持振动工具
EP0719616A1 (fr) * 1994-12-24 1996-07-03 Black & Decker Inc. Outil vibrant portatif perfectionné
USRE40345E1 (en) * 1998-04-29 2008-05-27 Black & Decker, Inc. Powered oscillating hand tool
US6179696B1 (en) 1998-04-29 2001-01-30 Black & Decker Inc. Powered oscillating hand tool
CN100577359C (zh) * 2005-07-21 2010-01-06 苏州宝时得电动工具有限公司 多功能砂光机
EP1745887A1 (fr) 2005-07-21 2007-01-24 Positec Power Tools (Suzhou) Co., Ltd. Outil de ponçage
EP2366495A1 (fr) 2010-03-19 2011-09-21 Festool GmbH Machine-outil manuelle dotée d'un engrenage excentrique et d'un verrou
EP2366496A1 (fr) * 2010-03-19 2011-09-21 Festool GmbH Machine-outil manuelle dotée d'une poignée
EP2366493A1 (fr) 2010-03-19 2011-09-21 Festool GmbH Machine-outil manuelle dotée d'un engrenage excentrique comprenant un moyen de guidage à angle de rotation
DE102010012021B3 (de) * 2010-03-19 2011-09-22 Festool Gmbh Hand-Werkzeugmaschine mit einem Exzentergetriebe und einer Sperre
DE102010012025A1 (de) 2010-03-19 2011-09-22 Festool Gmbh Hand-Werkzeugmaschine mit einem Drehwinkel-Führungsmittel aufweisenden Exzentergetriebe
DE102010012025B4 (de) 2010-03-19 2022-02-03 Festool Gmbh Hand-Werkzeugmaschine mit einem Drehwinkel-Führungsmittel aufweisenden Exzentergetriebe
CN106625140A (zh) * 2015-10-29 2017-05-10 南京德朔实业有限公司 砂光机

Also Published As

Publication number Publication date
DE4118392B4 (de) 2010-03-18
DE4118392A1 (de) 1992-12-10

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