WO1997042000A1 - Ponceuse vibrante - Google Patents

Ponceuse vibrante Download PDF

Info

Publication number
WO1997042000A1
WO1997042000A1 PCT/DE1997/000139 DE9700139W WO9742000A1 WO 1997042000 A1 WO1997042000 A1 WO 1997042000A1 DE 9700139 W DE9700139 W DE 9700139W WO 9742000 A1 WO9742000 A1 WO 9742000A1
Authority
WO
WIPO (PCT)
Prior art keywords
pin
orbital sander
drive shaft
grinding
grinding plate
Prior art date
Application number
PCT/DE1997/000139
Other languages
German (de)
English (en)
Inventor
Rudolf Fuchs
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
Priority to DE59707033T priority Critical patent/DE59707033D1/de
Priority to EP97907018A priority patent/EP0842012B1/fr
Priority to JP9539395A priority patent/JPH11508831A/ja
Publication of WO1997042000A1 publication Critical patent/WO1997042000A1/fr

Links

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
    • 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

Definitions

  • the invention relates to an orbital sander according to the preamble of claim 1 and a grinding plate according to the preamble of claim 9.
  • an orbital sander is known, the triangular sanding plate of which, together with the triangular sanding sheet, is driven in an eccentrically circular manner without rotating.
  • the grinding disc of this orbital sander performs a circular movement with an eccentric stroke of approximately 1.5 mm.
  • a single abrasive grain of an abrasive sheet attached to the abrasive disc has only a small working stroke.
  • the removal or grinding performance is relatively low.
  • This orbital sander is specially designed for fine grinding of smaller surfaces, particularly in corners and on the edges of workpieces, and is not suitable for rough grinding of larger surfaces, for example of wooden floors.
  • EP 623 422 discloses a triangular grinder with a manual transmission, in the first switching stage of which the rotary-swivel movement of the grinding plate, ie the orbital sander operation, and in its second switching stage the circularly rotating movement of the grinding plate, ie the eccentric grinding operation, can be set.
  • This triangular grinder combines the properties of a rotary swivel grinder with those of an eccentric grinder, i.e. This means that smaller surfaces can be finely and efficiently grinded larger surfaces.
  • this triangular grinder is heavier and more expensive than conventional orbital grinders and less abrasive than known, high-speed rotating flat grinders.
  • the orbital sander according to the invention with the characterizing features of claim 1 or the grinding plate according to claim 9 has the advantage that a device is created with little manufacturing effort and without changing the basic construction of the orbital sander, with which both the previously known fine-tuning in particular in corners, the angular grinding disc circles without rotating, and rough grinding, where the round grinding disc rotates at high speed, is possible.
  • the square and round grinding plates can be exchanged for one another particularly easily and quickly.
  • the orbital sander is particularly easy to convert into a flat grinder in that the drive shaft has a central bore into which a pin of the grinding plate can be inserted in a rotationally fixed and axially locking manner.
  • the grinding plate is secured against rotation, in particular against rotation, by a driver pin running parallel to the pin, which engages positively in the eccentric pin and in that the pin bore runs parallel to the blind hole in the eccentric pin at a radial distance from the latter.
  • the surface grinding plate is secured against unintentional loosening, in that there is a latching connection between the upper region of the plug-in pin and the drive shaft, a ball supported by a spring supported ball which can be moved radially in the wall of the drive shaft in the region of the blind hole, into an annular groove of the plug-in pin intervenes.
  • the mode change between the use as an orbital sander or as a flat sander is particularly facilitated by the fact that the circular sanding plate can be exchanged for an angular, in particular triangular, sanding plate, which is not directly driven by rotation with the drive shaft and which can be detachably coupled to the tool holder by means of a detent connection is. in particular in that the latching connection between the triangular grinder plate and the tool holder can be locked and released by hand using a sliding button.
  • the grinding plate Since the sanding plate is a wearing part, it is necessary to reposition the corner areas quickly in relation to the tool holder in the orbital sander mode or its easy interchangeability for the surface sander mode of considerable advantage. This advantage results from the interaction of the locking means of the grinding plate with those of the tool holder or the drive shaft.
  • the grinding plate thus also has inventive features, which is an important component or spare part.
  • the grinding plate has the advantage that it can be coupled centrally with the drive shaft in a rotationally driving manner, wherein it carries a plug-in pin and a driving pin for coupling with the drive shaft.
  • FIG. 1 shows a longitudinal section of a first exemplary embodiment of an orbital sander according to the invention
  • FIG. 2 shows a bottom view of the tool holder according to FIG. 1
  • FIG. 3 shows an enlarged, partial partial section of a further exemplary embodiment of an orbital sander according to the invention with a triangular sanding plate for fine grinding
  • FIG. 4 shows a top view of the orbital sander according to FIG. 3
  • FIG. 5 shows a partial side section of the Orbital sander in accordance with FIG. 3 with a circular abrasive disc replaced by the triangular one for the function as a disc sander
  • FIG. 6 is a top view of the orbital sander in accordance with FIG. 5.
  • the electric hand-held grinder shown in detail in a side view and partially in section in FIG. 1 is an orbital sander 9 with a triangular, symmetrical one Abrasive plate trained grinding tool 10 designed.
  • the underside of the sanding plate consists of plastic and is provided with a Velcro covering 11 for receiving sanding sheets (not shown).
  • the orbital sander 9 has a two-shell machine housing which is composed of two housing shells 121, 122 which abut each other along a parting line 123 running parallel to the longitudinal axis of the housing.
  • An electric motor 13 is accommodated in the machine housing 12, of which only the fan 15 seated on the output shaft 14 can be seen.
  • An on / off switch 16 arranged on the upper side of the machine housing 12 serves to switch the electric motor 13 on and off.
  • the output shaft 14 drives via an angular gear 17 a drive shaft 18 which is rotatably mounted in two ball bearings 19a and 19b which are fixed to the housing and which protrudes from the machine housing 12 with an eccentric pin 20 on the lower end face of the machine housing 12.
  • the grinding tool 10 is fixed on the tool holder 22 by means of corresponding positive locking elements on the tool holder side or on the tool side and by means of a quick locking device 24 which can be operated manually via an operating button 25 is to be held.
  • the grinding tool 10 lies on a support surface 37 of the bowl-shaped tool holder 22, which is clearly highlighted by a drawn line and includes with the tool holder 22 a dust extraction chamber 26, which on the one hand has suction holes 27 in the grinding tool 10 and corresponding, corresponding holes in the sanding sheets are open to the side of a workpiece (not shown) to be machined and, on the other hand, are connected via a bellows 28 to a dust extraction duct 29 which runs in the machine housing 12 and which is to be connected at the end to a third-party suction fan.
  • Locking elements 40 on the tool side are designed as hooks 42 integrally formed on the grinding tool 10, which are offset from one another on a circular line by the same angle of rotation and from which the upper side of the grinding tool 10 facing the bearing surface 37 on the tool holder 22 protrude.
  • the hooks 42 are molded onto the outside of the sleeve 38, the inner surface of which carries the polygon profile 39.
  • the cooperating locking elements 41 on the holder side are formed by an annularly bent spring wire 43.
  • a symmetrical polygonal profile 36 is formed on the underside of the tool carrier 22 on the outside of the pin 32, which consists of three identical circular arc sections 361 which are offset by 120 ° from one another and which are composed of three again the same circular arc sections 362 are offset from one another by 120 °, the arc radius of which is greater than that of the circular arc sections 361.
  • the spring wire 43 has a number corresponding to the number of hooks 42 on the sleeve 38, in this case three indentations 431 which point radially inwards and which, in accordance with the hooks 42, are in turn offset from one another by the same angle of rotation.
  • the spring wire 43 is rotatably or displaceably received in the outer slots 51 by webs 44 on the tool holder 22, which are arranged on a partial circle which is coaxial with the axis 33 of the pin 32 or the ball bearing 21 and is integral therewith with the tool holder 22 stick out below.
  • the webs 44 are arranged in pairs so that in the locked position of the spring wire 43, as shown in FIG. 2, there is a pair of webs on both sides of an indentation 431.
  • the pairs of webs are in turn offset by the same circumferential angle.
  • the annularly bent spring wire 43 runs out into two legs 432 and 433, which are approximately radially striving away and mutually parallel.
  • the one leg 432 is bent at right angles at the end and lies in front of the straight end of the leg 433.
  • the operating button 25 of the quick locking device 24 can be clipped onto the free ends of the legs 432, 433, for which purpose the operating button 25 on its underside has corresponding grooves and latching not shown having.
  • the leg 432 of the spring wire 43 is pressed into this groove, its bent end coming to rest in a transverse groove, while the other leg 433 is captively clipped into a further groove, not shown.
  • the spring wire 43 guided in the transverse slots 51 of the webs 44 can now be pivoted in the spring wire plane, as a result of which the recesses 431 engaging behind the hooks 42 in the locking position slide away from the hooks 42, so that those located radially further out Move parts of the spring wire 43 to the place of the indentations 431 and thus release the hooks 42.
  • the grinding tool 10 can be manually pulled off in the direction of the axis 33 by the tool holder 22.
  • the grinding tool 10 can be changed and - in the abovementioned design of the grinding tool 10 as a triangular, symmetrical grinding plate - rotated through 120 ° in each case with a corner forward again in the tool holder 22.
  • the grinding tool 10 can be clipped onto the tool holder 22.
  • the control button 25 can then be omitted, as can the rotatable reception of the spring wire 43 in the transverse slots 51 of the webs 44.
  • FIG. 3 shows a section of the front area of the housing 212 of an orbital sander 210 similar to that according to FIGS. 1 and 5.
  • the triangular grinding plate 268 is coupled to the drive shaft 224 via the tool holder 222.
  • An annular collar 256 of the tool holder 222 engages around a central outside
  • Ring region 258 of the tool holder 222 which concentrically encompasses the first roller bearing 234.
  • the ring collar 256 goes into one Short, cross-section-like, radial front collar 257 with an outer inclined surface 259.
  • the collar 257 of the grinding plate 268 passes through the radially further regions of the ring spring 260 pivoted by means of the operating button, which corresponds to the ring spring 43 according to FIGS. 1 and 2, and holds after pivoting back the annular spring 43 is axially immovably fixed at its radially narrower regions.
  • the tool holder 222 made of plastic is fastened to the machine housing 212 via a corrugated membrane-like oscillating body 223, so that it is prevented from rotating when the eccentric pin 220 is rotated and thus can only rotate without rotating.
  • the ring spring 260 is also pivoted, so that it releases its radially wider areas in the same way as the ring-like spring wire 43 described for FIGS. 1 and 2, the grinding plate 268 then being easily removed axially.
  • FIG. 4 illustrates the configuration of the orbital sander 10 as a triangular sander, the sanding plate 268 of which can be easily released or locked by means of the sliding button 262.
  • FIG. 5 shows an enlarged section of an orbital sander 110, which essentially corresponds to the orbital sander 9 from FIG. 1 or the section according to FIG. 3, and its front region of the housing 112.
  • the circular sanding plate 118 which is only shown in a lateral section, carries a round sanding sheet 120 via a Velcro connection, which is not described in more detail.
  • a tool holder 122 On the side of the sanding plate 118 facing away from the sanding sheet 120, a tool holder 122 adjoins axially at a distance, which, according to FIG. 3, can hold the triangular sanding plate 268, which can be released by means of a sliding button 162, in a rotationally fixed manner and secured against axial loosening but according to FIG. 5 only has a function as a dust extraction hood.
  • a drive shaft 124 which is rotatably connected to the motor and rotatably mounted in a housing roller bearing 136, is coupled to the tool holder 122 and the grinding plate 118.
  • the free end of the drive shaft 124 is designed as an eccentric pin 126 which is rotatably gripped by the inner ring 133 of a lower roller bearing 134 pressed into the tool holder 122 with its outer ring 135. Due to the free rotatability of the tool holder 122 relative to the drive shaft 124, the rotating drive shaft 124 only takes the tool holder 122 in a circular manner without being able to rotate it.
  • the eccentric pin 126 carries a blind bore 128 which is central to the axis of the drive shaft 124 and is open on the grinding plate side.
  • a pin 130 which engages with the grinding plate 118 in a rotationally fixed manner engages in the blind hole 128.
  • the tool holder 122 holds or is supported on the housing 112 elastically via a corrugated membrane-like oscillating element 138.
  • the opening 142 of a bellows 146 projects into an opening 141 of the tool holder 122 and, with its free end opposite the mouth 142, is centered in a channel not shown which corresponds to the dust removal channel 19 according to FIG. 1.
  • the driver pin 131 engages in the small, front-side pin bore 132 parallel to the blind bore 128 of the eccentric pin 126 for driving the grinding plate 118 in rotation.
  • the driver pin 131 is arranged axially parallel at a radial distance from the pin 130 on the grinding plate 118.
  • the pin hole 132 assigned to the driving pin 131 is arranged parallel to the blind hole 128 and open on the grinding plate side at the free end of the eccentric pin 126.
  • the plug pin 130 carries a circumferential annular groove 148, into which a ball 150 can enter, which can be secured against loss and can be slidably acted upon by a spring 152 in a radial bore 151 in the wall of the drive shaft 124 in the region of the blind bore 128 sits.
  • a spring 152 in a radial bore 151 in the wall of the drive shaft 124 in the region of the blind bore 128 sits.
  • Suction openings 154 are identified by dashed lines, which pass axially through the grinding plate 118 and which are used for dust extraction.
  • the grinding dust that occurs during grinding is conveyed outwards through the bellows 146 and the dust removal channel 144, in particular into a dust bag.
  • FIG. 6 shows the circular contour of the grinding plate 118 and the arrangement of the control button 162 and the angled course of the machine housing 112.
  • the orbital sander 109 in the configuration according to FIGS. 5, 6 can be used as a fast-rotating rough grinding tool of the type a flat grinder or disc grinder are used and in the configuration according to FIGS. 3, 4 as a triangular grinder moved in a circular manner without rotating for fine or corner grinding.
  • a central polygonal pin is provided on the grinding plate, which engages in a suitable, central polygonal hole in the drive shaft.

Landscapes

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

Abstract

L'invention concerne une ponceuse vibrante (9, 110, 120) comportant un arbre d'entraînement (18, 124, 224) monté rotatif dans un boîtier (12, 112, 212), qui communique à l'aide d'une goupille excentrique un mouvement orbital à un disque de ponçage (10, 118, 268) solidarisé de manière élastique avec le boîtier (12, 112, 212) par l'intermédiaire d'au moins un élément oscillant (23, 138, 238). Cette ponceuse vibrante peut être rajustée dans un appareil de dégrossissage à la meule, du fait qu'un disque de ponçage (118) de préférence orbiculaire peut être accouplé déplacé excentré et bloqué en rotation à l'extrémité excentrée de l'arbre d'entraînement (18, 124, 224), de préférence au niveau d'une goupille excentrique (20, 126, 226), de manière que ledit disque de ponçage puisse être entraîné en rotation de manière centrée par l'arbre d'entraînement (18, 124, 224) et être désaccouplé d'un élément oscillant (23, 138, 238) (au moins au nombre de un).
PCT/DE1997/000139 1996-05-02 1997-01-28 Ponceuse vibrante WO1997042000A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59707033T DE59707033D1 (de) 1996-05-02 1997-01-28 Schwingschleifer
EP97907018A EP0842012B1 (fr) 1996-05-02 1997-01-28 Ponceuse vibrante
JP9539395A JPH11508831A (ja) 1996-05-02 1997-01-28 スイング型研削機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19617474.0 1996-05-02
DE19617474A DE19617474A1 (de) 1996-05-02 1996-05-02 Schwingschleifer

Publications (1)

Publication Number Publication Date
WO1997042000A1 true WO1997042000A1 (fr) 1997-11-13

Family

ID=7793012

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/000139 WO1997042000A1 (fr) 1996-05-02 1997-01-28 Ponceuse vibrante

Country Status (5)

Country Link
EP (1) EP0842012B1 (fr)
JP (1) JPH11508831A (fr)
CN (1) CN1115232C (fr)
DE (2) DE19617474A1 (fr)
WO (1) WO1997042000A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107756202A (zh) * 2016-08-15 2018-03-06 苏州宝时得电动工具有限公司 砂光机
US10603760B2 (en) 2017-09-19 2020-03-31 Campbell Hausfeld, Llc Multifunction rotary tool including hub

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006060652B4 (de) 2006-12-21 2019-09-05 Robert Bosch Gmbh Bohr- oder Meißelhammer mit einem Faltenbalg
US7736216B2 (en) 2008-08-20 2010-06-15 Black & Decker Inc. Sander having removable platen
DE102011084591A1 (de) * 2011-10-17 2013-04-18 Robert Bosch Gmbh Werkzeugmaschinenspannvorrichtung
DE102012210893A1 (de) * 2012-06-26 2014-01-02 Robert Bosch Gmbh Handschleifmaschine mit einer Schwingplatte
CN107791130B (zh) * 2016-09-07 2023-12-08 苏州宝时得电动工具有限公司 多功能砂光机
WO2019024941A1 (fr) * 2017-08-04 2019-02-07 苏州宝时得电动工具有限公司 Outil de meulage, et composant principal et composant de meulage de celui-ci

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056268A (en) * 1989-10-23 1991-10-15 Werkzeug Gmbh Accessory device for angle grinder
EP0623422A1 (fr) * 1993-05-05 1994-11-09 C. & E. FEIN GmbH & Co. Outil électrique
US5482499A (en) * 1993-11-18 1996-01-09 Ryobi Limited Sanding apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056268A (en) * 1989-10-23 1991-10-15 Werkzeug Gmbh Accessory device for angle grinder
EP0623422A1 (fr) * 1993-05-05 1994-11-09 C. & E. FEIN GmbH & Co. Outil électrique
US5482499A (en) * 1993-11-18 1996-01-09 Ryobi Limited Sanding apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107756202A (zh) * 2016-08-15 2018-03-06 苏州宝时得电动工具有限公司 砂光机
CN107756202B (zh) * 2016-08-15 2023-12-08 苏州宝时得电动工具有限公司 砂光机
US10603760B2 (en) 2017-09-19 2020-03-31 Campbell Hausfeld, Llc Multifunction rotary tool including hub

Also Published As

Publication number Publication date
EP0842012A1 (fr) 1998-05-20
CN1190364A (zh) 1998-08-12
CN1115232C (zh) 2003-07-23
DE59707033D1 (de) 2002-05-23
JPH11508831A (ja) 1999-08-03
DE19617474A1 (de) 1997-11-06
EP0842012B1 (fr) 2002-04-17

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