EP1478491A1 - Manual orbital sander - Google Patents

Manual orbital sander

Info

Publication number
EP1478491A1
EP1478491A1 EP02774297A EP02774297A EP1478491A1 EP 1478491 A1 EP1478491 A1 EP 1478491A1 EP 02774297 A EP02774297 A EP 02774297A EP 02774297 A EP02774297 A EP 02774297A EP 1478491 A1 EP1478491 A1 EP 1478491A1
Authority
EP
European Patent Office
Prior art keywords
elements
tool
manual
oscillating
orbital sander
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
EP02774297A
Other languages
German (de)
French (fr)
Other versions
EP1478491B1 (en
Inventor
Gustav Sieber
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 EP1478491A1 publication Critical patent/EP1478491A1/en
Application granted granted Critical
Publication of EP1478491B1 publication Critical patent/EP1478491B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Definitions

  • the invention is based on a hand-held vibratory grinding machine according to the preamble of claim 1.
  • the features of the preamble of claim 1 are known from documents EP 1 093 884 and EP 09 534 07.
  • the hand-held orbital grinders known from this have elongated, elastic oscillating elements which couple the tool to the housing in such a way that it can be rotated to a limited extent with respect to the latter. By means of these elastic oscillating elements, the tool can perform an orbital oscillating movement without rotation, whereby a relatively large amount of drive energy is absorbed by the elastic oscillating elements.
  • a hand-held vibratory grinding machine is known from US 2001/000 3087 AI, the grinding tool of which is coupled to the housing via rigid oscillating elements.
  • the rigid vibrating elements are articulated so that the tool can perform its orbital movement as in the other known hand-held vibratory grinding machines.
  • This manual orbital sander has a significantly better efficiency than that with elastic oscillating elements, but it has a higher weight and is more complex to manufacture than the known machines with elastic oscillating elements.
  • the handheld power tool according to the invention with the characterizing features of claim 1 has the advantage over the same good efficiency, same smoothness with lighter weight and lower manufacturing costs than the known machines.
  • the elastic oscillating elements each have a circumferential constriction at opposite ends creates a film hinge effective at 360 ° C, which improves the oscillatory properties of the oscillating elements in such a way that they absorb only extremely small amounts of energy from the drive motor, thereby increasing the efficiency of the machines and their service life is significantly increased.
  • the elastic oscillating elements each have a footplate at their ends and the constrictions are arranged there, the oscillating elements are simple to manufacture and easy to assemble.
  • Recesses more flexible or more elastic than parallel to the recesses or in the direction of the elongate web This means that each point coupled to the vibrating elements describes small ellipses instead of small circles, so that almost the grinding characteristics of a linear grinder can be achieved.
  • FIG. 1 shows a partially sectioned side view of the hand grinding machine according to the invention
  • FIG. 2 shows an enlarged detail from FIG. 1,
  • FIG. 3 shows the rear vibrating elements
  • Figure 4 shows the front vibration elements of the hand-held vibratory grinding machine according to the invention.
  • the hand-held orbital grinding machine 10 shown in FIG. 1 has an elongated machine housing 12 which serves as a handle and which receives an electric motor 13.
  • the machine housing 12 carries a slide button 14 at the top for switching the motor 13 on and off.
  • An electrical connection line 16 emerges from the rear of the machine housing 12.
  • a grinding plate 18 is arranged on the machine housing 12 for releasably receiving a grinding sheet 19. Rotations of the motor 13 are transmitted to the grinding plate 18 by a flexible shaft 101. This ends at one end in an eccentric pin 120 with which it is rotatably mounted on the grinding plate 18 via a needle layer 130.
  • the flexible shaft is rotatably supported with its first end above and immediately adjacent to the eccentric pin 120 in a lower roller bearing 140 on the machine housing 12.
  • the flexible shaft 101 is over a Plug-in coupling 150 coupled to a motor shaft (not explained in more detail).
  • the flexible shaft 101 is rotatably mounted in an upper roller bearing 160 in the machine housing 12.
  • the grinding plate 18 is secured via leaf spring-like vibrating elements 170, 180 on the machine housing 12 against loss and against rotation. Between the grinding plate 18 and the machine housing 12, a bellows 12 is arranged as an elastic connecting element, through which, despite the oscillating movement of the grinding plate 18, dust that is produced can flow out underneath.
  • the oscillating elements 170, 180 each have a constriction or waist 50, 52 at their upper and lower ends, through which the elastic rods each function like a cardan shaft. This minimizes the loss of power because the damping of the grinding plate vibration is reduced to the necessary extent. It also significantly improves the smooth running of the hand-held grinding machine.
  • FIGS 3 and 4 show the rear and front elastic vibrating element 170, 180, which consists of an upper and lower transverse blade 55, 57, between which three column-like individual elements extend. Near the cross blades 55, 57, each individual vibrating column has a waist 50, 52.
  • the oscillating element 180 arranged at the tip of the grinding plate 18 and shown in FIG. 4 consists of the transverse blades 59, 60, between which four individual oscillating columns with waists 50, 51 extend.
  • the efficiency of the vibrating element 180 is improved by the waist 50, 52 in the same way as the vibrating element 170 according to FIG. 3.
  • two concave, semi-cylindrical recesses are arranged transversely to the oscillating elements at the same location facing away from one another.
  • a film hinge is thus formed, which is very flexible transversely to the axis of the recesses and can be deformed significantly more rigidly parallel to the axis of the recesses.

Landscapes

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

Abstract

The invention relates to a manual orbital sander (10) with a housing (12) that carries a vibrating tool l(18). The vibration displacement of said tool (18) is limited by elongate, elastic vibration elements (170, 180) that link the tool (18) with the housing (12). The vibration elements (170, 180) carry two nicks (50, 52), especially contractions, spaced apart from each other far off-center.

Description

HandschwingschleifmaschineHand orbital sander
Stand der TechnikState of the art
Die Erfindung geht aus von einer Handschwingschleifmaschine nach dem Oberbegriff des Anspruchs 1.The invention is based on a hand-held vibratory grinding machine according to the preamble of claim 1.
Aus den Dokumenten EP 1 093 884 und EP 09 534 07 sind die Merkmale des Oberbegriffs des Anspruchs 1 bekannt. Die dar- aus bekannten Handschwingschleifer haben längliche, elastische Schwingelemente, die das Werkzeug mit dem Gehäuse so kuppeln, dass es gegenüber diesem begrenzt drehbar ist. Durch diese elastischen Schwingelemente kann das Werkzeug eine orbitale Schwingbewegung ohne Rotation durchführen, wo- bei durch die elastischen Schwingelemente verhältnismäßig viel Antriebsenergie absorbiert wird.The features of the preamble of claim 1 are known from documents EP 1 093 884 and EP 09 534 07. The hand-held orbital grinders known from this have elongated, elastic oscillating elements which couple the tool to the housing in such a way that it can be rotated to a limited extent with respect to the latter. By means of these elastic oscillating elements, the tool can perform an orbital oscillating movement without rotation, whereby a relatively large amount of drive energy is absorbed by the elastic oscillating elements.
Aus der US 2001/000 3087 AI ist eine Handschwingschleifmaschine bekannt, deren Schleifwerkzeug über starre Schwing- elemente mit dem Gehäuse gekuppelt ist. Die starren Schwingelemente sind gelenkig gelagert, so dass dadurch das Werkzeug seine orbitale Bewegung wie bei den anderen bekannten Handschwingschleifmaschinen durchführen kann.A hand-held vibratory grinding machine is known from US 2001/000 3087 AI, the grinding tool of which is coupled to the housing via rigid oscillating elements. The rigid vibrating elements are articulated so that the tool can perform its orbital movement as in the other known hand-held vibratory grinding machines.
Diese Handschwingschleifmaschine hat einen deutlich besseren Wirkungsgrad als die mit elastischen Schwingelementen, sie hat jedoch ein höheres Eigengewicht und ist aufwendiger herzustellen als die bekannten Maschinen mit elastischen Schwingelementen .This manual orbital sander has a significantly better efficiency than that with elastic oscillating elements, but it has a higher weight and is more complex to manufacture than the known machines with elastic oscillating elements.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Handwerkzeugmaschine mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vor- teil gleich guten Wirkungsgrads, gleicher Laufruhe bei ge- ringerem Gewicht und geringeren Herstellungskosten als die bekannten Maschinen.The handheld power tool according to the invention with the characterizing features of claim 1 has the advantage over the same good efficiency, same smoothness with lighter weight and lower manufacturing costs than the known machines.
Dadurch, dass die elastischen Schwingelemente an entgegenge- setzten Enden je eine umlaufende Einschnürung tragen, wird damit ein um 360°C wirksames Filmscharnier geschaffen, das die Schwingeigenschaf der Schwingelemente derart verbessert, dass sie nur noch äußerst geringe Energiemengen des Antriebsmotors absorbieren, wobei der Wirkungsgrad der Ma- schinen und deren Lebensdauer deutlich erhöht ist.The fact that the elastic oscillating elements each have a circumferential constriction at opposite ends creates a film hinge effective at 360 ° C, which improves the oscillatory properties of the oscillating elements in such a way that they absorb only extremely small amounts of energy from the drive motor, thereby increasing the efficiency of the machines and their service life is significantly increased.
Dadurch, dass die elastischen Schwingelemente an ihren Enden je eine Fußplatte haben und dass dort die Einschnürungen angeordnet sind, sind die Schwingelemente einfach herzustellen und leicht zu montieren, .Because the elastic oscillating elements each have a footplate at their ends and the constrictions are arranged there, the oscillating elements are simple to manufacture and easy to assemble.
Dadurch, dass die Einschnürungen in Gestalt zwei konkaver, gerader Einprägungen an gegenüberliegenden Enden der elastischen Schwingelemente bestehen und ein länglicher Steg ge- bildet ist, sind die Filmscharniere quer zu den radialenThe fact that the constrictions in the form of two concave, straight impressions exist at opposite ends of the elastic oscillating elements and that an elongate web is formed means that the film hinges are transverse to the radial ones
Ausnehmungen biegeweicher bzw. elastischer als parallel zu den Ausnehmungen bzw. in Richtung des länglichen Stegs. Dadurch beschreibt jeder mit den Schwingelementen gekoppelte Punkt statt kleiner Kreise kleine Ellipsen, so dass annä- hernd die SchleifCharakteristik eines Linearschleifers damit erreichbar ist.Recesses more flexible or more elastic than parallel to the recesses or in the direction of the elongate web. This means that each point coupled to the vibrating elements describes small ellipses instead of small circles, so that almost the grinding characteristics of a linear grinder can be achieved.
Zeichnungdrawing
Nachstehend ist die Erfindung anhand einer zugehörigen Zeichnung näher beschrieben.The invention is described in more detail below with the aid of an associated drawing.
Es zeigen Figur 1 eine teilweise geschnittene Seitenansicht der erfindungsgemäßen Handschleifmaschine,Show it FIG. 1 shows a partially sectioned side view of the hand grinding machine according to the invention,
Figur 2 einen vergrößerten Ausschnitt aus Figur 1,FIG. 2 shows an enlarged detail from FIG. 1,
Figur 3 die hinteren Schwingelemente undFigure 3 shows the rear vibrating elements and
Figur 4 die vorderen Schwingelemente der erfindungsgemäßen Handschwingschleifmaschine.Figure 4 shows the front vibration elements of the hand-held vibratory grinding machine according to the invention.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Die Figur 1 gezeigte Handschwingschleifmaschine 10 weist ein längliches, als Handgriff dienendes Maschinengehäuse 12 auf, das einen Elektromotor 13 aufnimmt. Das Maschinengehäuse 12 trägt oben eine Schiebetaste 14 zum Ein- und Ausschalten des Motors 13.The hand-held orbital grinding machine 10 shown in FIG. 1 has an elongated machine housing 12 which serves as a handle and which receives an electric motor 13. The machine housing 12 carries a slide button 14 at the top for switching the motor 13 on and off.
Nach hinten tritt aus dem Maschinengehäuse 12 eine elektri- sehe Anschlußleitung 16 aus.An electrical connection line 16 emerges from the rear of the machine housing 12.
Von dort ist am Maschinengehäuse 12 ein Schleifteller 18 angeordnet zur lösbaren Aufnahme eines Schleifblatts 19. Auf den Schleifteller 18 werden Drehungen des Motors 13 durch eine biegsame Welle 101 übertragen. Diese endet mit einem Ende in einem Exzenterzapfen 120, mit dem sie über ein Nadellagen 130 am Schleifteller 18 drehbar gelagert ist. Außerdem ist die biegsame Welle mit ihrem ersten Ende oberhalb und unmittelbar benachbart zum Exzenterzapfen 120 in einem unterem Wälzlager 140 am Maschinengehäuse 12 drehbar gelagert. Motorseitig ist die biegsame Welle 101 über eine Steckkupplung 150 mit einer nicht näher erläuterten Motorwelle gekuppelt. Außerdem ist in der Nähe der Steckkupplung 150 die biegsame Welle 101 in einem oberen Wälzlager 160 im Maschinengehäuse 12 drehbar gelagert .From there, a grinding plate 18 is arranged on the machine housing 12 for releasably receiving a grinding sheet 19. Rotations of the motor 13 are transmitted to the grinding plate 18 by a flexible shaft 101. This ends at one end in an eccentric pin 120 with which it is rotatably mounted on the grinding plate 18 via a needle layer 130. In addition, the flexible shaft is rotatably supported with its first end above and immediately adjacent to the eccentric pin 120 in a lower roller bearing 140 on the machine housing 12. On the motor side, the flexible shaft 101 is over a Plug-in coupling 150 coupled to a motor shaft (not explained in more detail). In addition, in the vicinity of the plug-in coupling 150, the flexible shaft 101 is rotatably mounted in an upper roller bearing 160 in the machine housing 12.
Der Schleifteller 18 ist über blattfederartige Schwingelemente 170, 180 am Maschinengehäuse 12 gegen Verlieren und gegen Drehmitnahme gesichert befestigt. Zwischen dem Schleifteller 18 und dem Maschinengehäuse 12 ist als elasti- sches Verbindungselement ein Faltenbalg 12 angeordnet, durch den trotz der Schwingbewegung des Schleiftellers 18 darunter anfallender Staub abströmen kann.The grinding plate 18 is secured via leaf spring-like vibrating elements 170, 180 on the machine housing 12 against loss and against rotation. Between the grinding plate 18 and the machine housing 12, a bellows 12 is arranged as an elastic connecting element, through which, despite the oscillating movement of the grinding plate 18, dust that is produced can flow out underneath.
Die Schwingelemente 170, 180 tragen an ihrem oberen und un- teren Ende je eine Einschnürung bzw. Taillierung 50, 52, durch die die elastischen Stäbe jeweils wie eine Kardanwelle funktionieren. Dadurch wird der Kraftverlust minimiert, weil die Bedämpfung der Schleiftellerschwingung auf das notwendige Maß reduziert ist. Außerdem wird dadurch die Laufruhe der Schleifhandwerkzeugmaschine deutlich verbessert.The oscillating elements 170, 180 each have a constriction or waist 50, 52 at their upper and lower ends, through which the elastic rods each function like a cardan shaft. This minimizes the loss of power because the damping of the grinding plate vibration is reduced to the necessary extent. It also significantly improves the smooth running of the hand-held grinding machine.
Figuren 3 und 4 zeigen das hintere und vordere elastische Schwingelement 170, 180, das aus einem oberen und unteren Querblatt 55, 57 besteht, zwischen dem sich jeweils drei säulenartige Einzelelemente erstrecken. Nahe den Querblättern 55, 57 hat jede einzelne Schwingsäule eine Taillierung 50, 52.Figures 3 and 4 show the rear and front elastic vibrating element 170, 180, which consists of an upper and lower transverse blade 55, 57, between which three column-like individual elements extend. Near the cross blades 55, 57, each individual vibrating column has a waist 50, 52.
Das an der Spitze des Schleiftellers 18 angeordnete, in Fi- gur 4 gezeigte Schwingelement 180, besteht aus den Querblättern 59, 60, zwischen denen sich vier einzelne Schwingsäulen mit Taillierungen 50, 51 erstrecken. Der Wirkungsgrad des Schwingelements 180 ist durch die Taillierung 50, 52 auf die gleiche Weise verbessert wie das Schwingelement 170 gemäß Figur 3. Bei einem nicht dargestellten Ausführungsbeispiel sind anstelle umlaufender Einschnürungen bzw. Taillierungen je zwei konkave, halbzylindrische Ausnehmungen quer zu den Schwingelementen einander abgewandt an gleicher Stelle angeordnet. Damit wird ein Filmscharnier gebildet, das quer zur Achse der Ausnehmungen sehr biegeweich und parallel zur Achse der Ausnehmungen deutlich biegesteifer verformbar ist. Damit ist bei Verwendung derartiger Schwingelemente annähernd das Schwingungsverhalten eines Linearschleifers erreichbar. The oscillating element 180 arranged at the tip of the grinding plate 18 and shown in FIG. 4 consists of the transverse blades 59, 60, between which four individual oscillating columns with waists 50, 51 extend. The efficiency of the vibrating element 180 is improved by the waist 50, 52 in the same way as the vibrating element 170 according to FIG. 3. In an exemplary embodiment, not shown, instead of circumferential constrictions or waists, two concave, semi-cylindrical recesses are arranged transversely to the oscillating elements at the same location facing away from one another. A film hinge is thus formed, which is very flexible transversely to the axis of the recesses and can be deformed significantly more rigidly parallel to the axis of the recesses. Thus, when using such vibrating elements, the vibration behavior of a linear grinder can be approximately achieved.

Claims

Ansprüche Expectations
1. Handschwingschleifmaschine (10) mit einem Gehäuse1. Manual orbital sander (10) with a housing
(12), dass ein schwingend bewegbares Werkzeug (18) trägt, wobei der Schwingweg des Werkzeugs (18) durch längliche, elastische Schwingelemente (170, 180) begrenzt ist, die das Werkzeug (18) mit dem Gehäuse (12) kuppeln, dadurch gekennzeichnet, dass die Schwingelemente (170, 180) außermittig zwei voneinan- der beabstandete Taillierungen (50, 52) tragen.(12) that carries an oscillatingly movable tool (18), the oscillating path of the tool (18) being limited by elongated, elastic oscillating elements (170, 180) which couple the tool (18) to the housing (12) characterized in that the oscillating elements (170, 180) have two waisted spacings (50, 52) spaced apart from one another.
2. Handschwingschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Taillierungen (50, 52) der Schwingelemente (170, 180) je als umlaufende Ein- schnürung ausgestaltet sind.2. Manual vibratory grinding machine according to claim 1, characterized in that the waists (50, 52) of the vibrating elements (170, 180) are each designed as a circumferential constriction.
3. Handschwingschleifmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Schwingelemente (170, 180) an ihren Enden je ein Querblatt (55, 57, 59, 60) haben und dass dort nah benachbart die Taillierungen (50, 52) angeordnet sind.3. Manual orbital sander according to claim 1 or 2, characterized in that the oscillating elements (170, 180) each have a transverse blade (55, 57, 59, 60) at their ends and that the waists (50, 52) are arranged closely adjacent there ,
4. Handschwingschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Taillierungen der Schwing- elemente (170, 180) jeweils als zwei gegenüberliegende, insbesondere konkave, Abflachungen ausgestaltet sind, die ein Filmscharnier bilden, das quer zu den Abflachungen einen geringen und parallel dazu einen hohen Biegewiderstand hat . 4. Manual orbital sander according to claim 1, characterized in that the waists of the oscillating elements (170, 180) are each designed as two opposing, in particular concave, flats which form a film hinge which has a small transverse to the flats and a parallel to it has high bending resistance.
EP02774297A 2001-12-07 2002-09-04 Manual orbital sander Expired - Lifetime EP1478491B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10160265 2001-12-07
DE10160265A DE10160265A1 (en) 2001-12-07 2001-12-07 Hand orbital sander
PCT/DE2002/003262 WO2003049902A1 (en) 2001-12-07 2002-09-04 Manual orbital sander

Publications (2)

Publication Number Publication Date
EP1478491A1 true EP1478491A1 (en) 2004-11-24
EP1478491B1 EP1478491B1 (en) 2005-12-07

Family

ID=7708454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02774297A Expired - Lifetime EP1478491B1 (en) 2001-12-07 2002-09-04 Manual orbital sander

Country Status (6)

Country Link
US (1) US7052383B2 (en)
EP (1) EP1478491B1 (en)
JP (1) JP2005511330A (en)
CN (1) CN100352604C (en)
DE (2) DE10160265A1 (en)
WO (1) WO2003049902A1 (en)

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DE10251556A1 (en) * 2002-11-06 2004-05-19 Robert Bosch Gmbh Bearing fitting for vibratory fitting of grinding plate to grinder has vibrating bodies mounted in groups or individually in separate modules
US20070141969A1 (en) * 2005-12-21 2007-06-21 Cybulski Eric R Sanding tool with molding interface pad
CN101890671B (en) * 2009-02-17 2014-05-28 C.&E.泛音有限公司 Tool for grinding or polishing for an oscillation drive
US20110023286A1 (en) * 2009-07-30 2011-02-03 Bryon Bierman Quick alignment orbital sander disc applicator
DE102013202953A1 (en) * 2013-02-22 2014-09-11 Robert Bosch Gmbh Hand tool
DE102013106546A1 (en) * 2013-06-24 2014-12-24 C. & E. Fein Gmbh Sanding pad for an oscillation drive
US11883936B2 (en) 2021-08-26 2024-01-30 Paul Trevethan Oscillating tool adapter

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JPS6161761A (en) * 1984-08-29 1986-03-29 Makita Denki Seisakusho:Kk Cordless polishing machine
GB9415011D0 (en) * 1994-07-26 1994-09-14 Black & Decker Inc Improved oscillating hand tool
US5885146A (en) * 1995-12-06 1999-03-23 Black & Decker Inc. Oscillating hand tool
US6039639A (en) * 1997-02-27 2000-03-21 Robert Bosch Gmbh Motor driven hand tool with improved elastic supporting members connecting an oscillating work tool carrier with the tool housing
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JP3634995B2 (en) * 1999-12-07 2005-03-30 株式会社マキタ Sanda
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Also Published As

Publication number Publication date
CN1498150A (en) 2004-05-19
WO2003049902A1 (en) 2003-06-19
DE50205231D1 (en) 2006-01-12
CN100352604C (en) 2007-12-05
EP1478491B1 (en) 2005-12-07
US7052383B2 (en) 2006-05-30
DE10160265A1 (en) 2003-06-18
US20040053568A1 (en) 2004-03-18
JP2005511330A (en) 2005-04-28

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