EP0836543B1 - Hand-operated orbital sander - Google Patents
Hand-operated orbital sander Download PDFInfo
- Publication number
- EP0836543B1 EP0836543B1 EP97915266A EP97915266A EP0836543B1 EP 0836543 B1 EP0836543 B1 EP 0836543B1 EP 97915266 A EP97915266 A EP 97915266A EP 97915266 A EP97915266 A EP 97915266A EP 0836543 B1 EP0836543 B1 EP 0836543B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- orbital sander
- tool holder
- oscillation body
- sander according
- 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.)
- Expired - Lifetime
Links
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
- B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
Definitions
- the invention is based on a hand-guided, Orbital sander in the preamble of claim 1 defined genus.
- the hand-held orbital sander according to the invention with the characteristic features of claim 1 has in contrast the advantage that the trained according to the invention Swing body for flexible connection of the tool holder symmetrical power distribution to the housing.
- the torque of the tool holder with vibrating body can about the hardness or thickness of the elastic molded part can be varied as required.
- the vibrating body met ideally the demands for a possible "hard” twisting on the one hand, which is advantageous for the Grinding abrasion is, and a "soft" shift over the eccentric pin on the other hand, which is advantageous for the Load on the pivot bearing.
- the vibrating body according to the invention enables a compact and flat design of the orbital sander and works additionally as a seal against the grinding dust on the bottom Bearing one end of the eccentric, from Electric motor driven work shaft.
- Fig. 1 in side view and hand-guided, partly cut, electric orbital sander in particular is known as Delta grinder executed, which is a triangular, symmetrical grinding plate as a grinding tool 10 carries.
- the bottom of the plastic sanding plate is not with a Velcro covering 11 for receiving provided sanding sheets.
- the Orbital sander can also with one be rectangular or equipped with other grinding tools, e.g. one Flap grinding attachment or a grinding tongue or one Slip pipe are operated.
- the orbital sander has a double-shell housing 12, which is composed of two housing shells 121, 122 those running along a parallel to the longitudinal axis of the housing Butt joint 123.
- a Electric motor 13 added, of which in Fig. 1 only the fan 15 seated on the output shaft 14 can be seen is.
- Switch slide 16 is used to switch the on and off Electric motor 13.
- the output shaft 14 drives via Angular gear 17 on a working shaft 18, which in two Ball bearings 19a and 19b fixed to the housing is rotatably mounted and on the lower end of the housing 12 with a Eccentric pin 20 protrudes from the housing 12.
- the vibrating body 23 which in FIGS. 2 and 3 in plan view and is shown in side view or in section, is as Ring formed with its radially inner Area on the tool holder 22 and with its radially outside lying area on the housing 12 can be fastened.
- the vibrating body 23 consists of a Inner ring 26, one concentrically arranged thereto Outer ring 27 and an annular molded part 28 elastic material, the inner and outer ring 26,27 connects with each other.
- Inner ring 26 and outer ring 27 are made of plastic and the molded part 28 is made of rubber or made of a sprayable soft plastic.
- the annular shaped part 28 an N-shaped cross section, the two axially extending concentric, annular legs 281,282 each firmly with the inner ring 26 and the outer ring 27 are connected.
- this can also have an M-shaped cross section, as in the vibrating body 23 is shown in FIG. 1.
- the Inner ring 26 is coaxial with the tool holder 22 Ball bearing 21 attached and the outer ring 27 is in the housing 12 held in rotation.
- the outer ring 27 is applied the outside of which is distributed over the circumference, integrally molded knobs 29.30, which fit in corresponding grooves formed in the housing 12 inlay.
- knobs provided here 29.30 are the two diametrically opposite Knobs 30 T-shaped so that you each Center web 301 strives radially away from the outer ring 27 and the Cross bar 302 is received in a groove 31, which is in half in a housing shell 121, 122 up to the parting line 123 is sufficiently trained.
- Fig. 1 are of the two Grooves 31 to see only the halves of the groove in the Housing shell 121 are formed.
- the inner ring 26 is on one on the top of the tool holder 22 coaxial to the axis 25 of the ball bearing 21 formed ring connector 32 pushed on and firmly connected to it, e.g. welded or glued.
Description
Die Erfindung geht aus von einem handgeführten, Schwingschleifer der im Oberbegriff des Anspruchs 1 definierten Gattung.The invention is based on a hand-guided, Orbital sander in the preamble of claim 1 defined genus.
Bei einem bekannten handgeführten Schwingschleifer dieser Art, auch elektrische Handschwingschleifmaschine genannt (EP 0 610 801 A1), ist die flexible Anbindung des Werkzeughalters mit Schleifwerkzeug an das den elektrischen Antriebsmotor für den rotierenden Exzenterzapfen enthaltende Gehäuse durch Schwingelemente mit T-Profil gebildet, die jeweils mit ihrem langen, stabförmigen Mittelsteg an dem Werkzeughalter befestigt sind und von diesem parallel zur Drehlagerachse abstehen und mit ihrem kürzeren Quersteg in im Gehäuse ausgebildeten Aussparungen formschlüssig einliegen. In a known hand-held orbital sander this Art, also called electric hand-held vibratory grinding machine (EP 0 610 801 A1), is the flexible connection of the Tool holder with grinding tool on the electrical Drive motor for the rotating eccentric pin Containing housings through vibrating elements with T-profile formed, each with their long, rod-shaped Center bar are attached to the tool holder and by protrude parallel to the pivot axis and with their shorter crossbar in recesses in the housing form fit.
Der erfindungsgemäße handgeführte Schwingschleifer mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß durch den erfindungsgemäß ausgebildeten Schwingkörper zur flexiblen Anbindung des Werkzeughalters an das Gehäuse eine symmetrische Kraftverteilung erfolgt. Das Verdrehmoment des Werkzeughalters mit Schwingkörper kann über die Härte oder Dicke des elastischen Formteils bedarfsgerecht variiert werden. Der Schwingkörper erfüllt in idealer Weise die Forderungen nach einer möglichst "harten" Verdrehung einerseits, was vorteilhaft für den Schleifabtrag ist, und einer "weichen" Verschiebung über den Exzenterzapfen andererseits, was vorteilhaft für die Belastung des Drehlagers ist.The hand-held orbital sander according to the invention with the characteristic features of claim 1 has in contrast the advantage that the trained according to the invention Swing body for flexible connection of the tool holder symmetrical power distribution to the housing. The torque of the tool holder with vibrating body can about the hardness or thickness of the elastic molded part can be varied as required. The vibrating body met ideally the demands for a possible "hard" twisting on the one hand, which is advantageous for the Grinding abrasion is, and a "soft" shift over the eccentric pin on the other hand, which is advantageous for the Load on the pivot bearing.
Der erfindungsgemäße Schwingkörper ermöglicht eine kompakte und flache Bauweise des Schwingschleifers und wirkt zusätzlich als Dichtung gegen den Schleifstaub am unteren Lager einer den Exzenterzapfen endseitig tragenden, vom Elektromotor angetriebenen Arbeitswelle.The vibrating body according to the invention enables a compact and flat design of the orbital sander and works additionally as a seal against the grinding dust on the bottom Bearing one end of the eccentric, from Electric motor driven work shaft.
Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen handgeführten Schwingschleifers möglich.By the measures listed in the other claims are advantageous further developments and improvements in Claim 1 specified hand-held orbital sander possible.
Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert. Es zeigen:
- Fig. 1
- ausschnittweise eine Seitenansicht eines handgeführten, elektrischen Schwingschleifers, teilweise geschnitten,
- Fig. 2
- eine Draufsicht eines Schwingkörpers im Schwingschleifer gemäß Fig. 1,
- Fig. 3
- eine Seitenansicht des Schwingkörpers gemäß Fig. 2 mit Schnitt gemäß Linie III-III in Fig. 2 im rechten Teil der Darstellung,
- Fig. 4
- eine Unteransicht eines Innenrings des Schwingkörpers in Fig. 2 und 3.
- Fig. 1
- excerpts a side view of a hand-held, electric orbital sander, partially cut,
- Fig. 2
- 2 shows a plan view of an oscillating body in the orbital sander according to FIG. 1,
- Fig. 3
- 2 with a section along line III-III in Fig. 2 in the right part of the illustration,
- Fig. 4
- a bottom view of an inner ring of the vibrating body in FIGS. 2 and 3.
Der in Fig. 1 ausschnittweise in Seitenansicht und
teilweise geschnitten dargestellte handgeführte,
insbesondere elektrische Schwingschleifer ist als sog.
Deltaschleifer ausgeführt, der eine dreieckförmige,
symmetrische Schleifplatte als Schleifwerkzeug 10 trägt.
Die Unterseite der aus Kunststoff gefertigten Schleifplatte
ist mit einem Klettbelag 11 zur Aufnahme von nicht
dargestellten Schleifblättern versehen. Der
Schwingschleifer kann aber ebenso mit einer
rechteckförmigen Schleifplatte ausgerüstet sein oder mit
anderen Schleifwerkzeugen, wie z.B. einem
Lamellenschleifvorsatz oder einer Schleifzunge oder einem
Schleifrohr betrieben werden.The detail in Fig. 1 in side view and
hand-guided, partly cut,
electric orbital sander in particular is known as
Delta grinder executed, which is a triangular,
symmetrical grinding plate as a
Der Schwingschleifer besitzt ein zweischaliges Gehäuse 12,
das aus zwei Gehäuseschalen 121,122 zusammengesetzt ist,
die längs einer parallel zur Gehäuselängsachse verlaufenden
Trennfuge 123 aneinanderstoßen. Im Gehäuse 12 ist ein
Elektromotor 13 aufgenommen, von dem in Fig. 1 lediglich
der auf der Abtriebswelle 14 sitzende Lüfter 15 zu sehen
ist. Ein auf der Oberseite des Gehäuses 12 angeordneter
Schaltschieber 16 dient zum Ein- und Ausschalten des
Elektromotors 13. Die Abtriebswelle 14 treibt über ein
Winkelgetriebe 17 eine Arbeitswelle 18 an, die in zwei
gehäusefesten Kugellagern 19a und 19b drehbar gelagert ist
und an der unteren Stirnseite des Gehäuses 12 mit einem
Exzenterzapfen 20 aus dem Gehäuse 12 vorsteht. Auf dem
Exzenterzapfen 20 sitzt ein Werkzeughalter 22 mit einem in
dem Werkzeughalter 22 eingepreßten Kugellager 21, der an
seiner Unterseite das plattenförmige Schleifwerkzeug 10
drehfest und axial unverschieblich aufnimmt. Werkzeughalter
22 und Schleifwerkzeug 10 sind in ihrer Form einander
angepaßt, so daß das Schleifwerkzeug 10 plan an dem
Werkzeughalter 22 anliegt. Der aus Kunststoff gefertigte
Werkzeughalter 22 ist über einen flexiblen Schwingkörper 23
am Gehäuse 12 festgelegt und damit gegen Drehmitnahme bei
rotierendem Exzenterzapfen 20 gesichert. Wird mittels des
Schaltschiebers 16 der Elektromotor 13 eingeschaltet, so
treibt dieser über das Winkelgetriebe 17 die Arbeitswelle
18 an, die um ihre Achse 24 rotiert. Der Exzenterzapfen 20,
dessen Achse 25 um das Exzentermaß gegenüber der Achse 24
der Arbeitswelle 18 versetzt ist, führt eine Kreisbewegung
aus, wodurch der Werkzeughalter 22, der durch den flexiblen
Schwingkörper 23 an einer Drehmitnahme gehindert ist, in
eine kreisende Schwingbewegung versetzt wird.The orbital sander has a double-
Der Schwingkörper 23, der in Fig. 2 und 3 in Draufsicht und
in Seitenansicht bzw. im Schnitt dargestellt ist, ist als
Ring ausgebildet, der mit seinem radial innen liegenden
Bereich am Werkzeughalter 22 und mit seinem radial außen
liegenden Bereich am Gehäuse 12 befestigbar ist.
Insbesondere besteht der Schwingkörper 23 aus einem
Innenring 26, einem dazu konzentrisch angeordneten
Außenring 27 und einem ringförmigen Formteil 28 aus
elastischem Material, das Innen- und Außenring 26,27
miteinander verbindet. Innenring 26 und Außenring 27 sind
aus Kunststoff und das Formteil 28 ist aus Gummi oder aus
einem spritzbaren Weichkunststoff hergestellt. Wie aus
Fig. 3 ersichtlich ist, weist das ringförmige Formteil 28
einen N-förmigen Querschnitt auf, wobei die beiden axial
verlaufenden konzentrischen, ringförmigen Schenkel 281,282
jeweils fest mit dem Innenring 26 bzw. dem Außenring 27
verbunden sind. In Abwandlung des Formteils 28 kann dieses
auch einen M-förmigen Querschnitt aufweisen, wie dies bei
dem Schwingkörper 23 in Fig. 1 dargestellt ist. Der
Innenring 26 ist am Werkzeughalter 22 koaxial zum
Kugellager 21 befestigt und der Außenring 27 ist im Gehäuse
12 drehfest gehalten. Hierzu trägt der Außenring 27 auf
seiner Außenseite über den Umfang verteilt angeordnete,
einstückig angeformte Noppen 29,30, die formschlüssig in
korrespondierenden, im Gehäuse 12 ausgebildeten Nuten
einliegen. Von den insgesamt hier sechs vorgesehenen Noppen
29,30 sind die beiden sich diametral gegenüberliegenden
Noppen 30 T-förmig so ausgebildet, daß jeweils ihr
Mittelsteg 301 radial vom Außenring 27 wegstrebt und der
Quersteg 302 in einer Nut 31 aufgenommen ist, die hälftig
in je einer Gehäuseschale 121,122 bis zur Trennfuge 123
reichend ausgebilde ist. In Fig. 1 sind von den beiden
Nuten 31 jeweils nur die Nuthälften zu sehen, die in der
Gehäuseschale 121 ausgebildet sind. Der Innenring 26 wird
auf einen auf der Oberseite des Werkzeughalters 22 koaxial
zur Achse 25 des Kugellagers 21 ausgebildeten Ringstutzen
32 aufgeschoben und mit diesem fest verbunden, z.B.
verschweißt oder verklebt. Zur genauen Ausrichtung des
Ringkörpers 23 beim Aufsetzen auf den Ringstutzen 32 sind
an der unteren Stirnseite des Innenrings 26 über den Umfang
verteilt angeordnete, einstückig angeformte
Positioniernocken 33 (Fig. 3 und 4) ausgeformt, die beim
Aufstecken des Ringkörpers 23 auf den Ringstutzen 32 in
entsprechende Aussparungen am Ringstutzen 32 formschlüssig
eintauchen.The vibrating
Claims (8)
- Hand-held orbital sander having a housing (12) and a tool holder (22) which accommodates a sanding tool (10), sits via a rotary bearing (21) on a rotating eccentric pin (20) projecting from the housing (12) and is flexibly attached to the housing (12) by means of at least one oscillation body (23) in such a way as to prevent rotary driving, characterized in that the oscillation body (23) is designed as a ring which can be fastened with its radially inner region to the tool holder (22) and with its radially outer region to the housing (12).
- Orbital sander according to Claim 1, characterized in that the oscillation body (23) consists of an inner ring (26), an outer ring (27) arranged concentrically thereto, and an annular moulded part (28) connecting the inner and outer rings (26, 27) to one another and made of an elastic material, and in that the inner ring (26) can be fastened to the tool holder (22) essentially coaxially to the rotary bearing (21), and the outer ring (27) can be mounted in a rotationally locked manner in the housing (12).
- Orbital sander according to Claim 2, characterized in that the outer ring (27) carries lugs (29, 30) which are arranged on its outside so as to be distributed over the periphery, are integrally formed in one piece and lie in a positive-locking manner in corresponding grooves (31) formed in the housing (12).
- Orbital sander according to Claim 3, characterized in that the housing (12) consists of two housing shells (121, 122) which are fitted together along a parting seam (123) running parallel to the housing longitudinal axis, and in that, of the lugs (30) integrally formed on the outer ring (27) of the oscillation body (23), two diametral lugs (30) are formed in a T-shape in such a way that in each case the centre web (301) of each lug (30) projects radially away from the outer ring (27), and the transverse web (302) of each lug (30) is accommodated in a groove (31) which is equally formed in each half of the housing shells (121, 122) up to the parting seam (123).
- Orbital sander according to one of Claims 2 to 4, characterized in that an annular connection piece (32) is integrally formed on the tool holder (22) and is arranged coaxially to the rotary-bearing axis (25) on the top side, remote from the sanding tool (10), of the tool holder (22), and in that the inner ring (26) of the oscillation body (23) is put onto the annular connection piece (32) and is firmly connected to the latter, e.g. by welding or adhesive bonding.
- Orbital sander according to one of Claims 2 to 5, characterized in that the inner ring (26) of the oscillation body (23) has positioning dogs (33) which are arranged so as to be distributed over the periphery on its end face facing the tool holder (22), are integrally formed in one piece and are intended for mounting the inner ring (29) on the tool holder (22) in the correct position.
- Orbital sander according to one of Claims 2 to 6, characterized in that the annular moulded part (28) of the oscillation body (23) has an N-shaped or M-shaped cross section, and in that the two axially running, concentric, annular legs (281, 282) are in each case firmly connected to the inner and outer rings (26, 27) respectively.
- Orbital sander according to one of Claims 1 to 7, characterized in that the moulded part (28) of the oscillation body (23) is made of rubber or a flexible plastic capable of injection moulding.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19617573A DE19617573A1 (en) | 1996-05-02 | 1996-05-02 | Hand-held orbital sander |
DE19617573 | 1996-05-02 | ||
PCT/DE1997/000145 WO1997042001A1 (en) | 1996-05-02 | 1997-01-28 | Hand-operated orbital sander |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0836543A1 EP0836543A1 (en) | 1998-04-22 |
EP0836543B1 true EP0836543B1 (en) | 2001-11-14 |
Family
ID=7793092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97915266A Expired - Lifetime EP0836543B1 (en) | 1996-05-02 | 1997-01-28 | Hand-operated orbital sander |
Country Status (7)
Country | Link |
---|---|
US (1) | US5855504A (en) |
EP (1) | EP0836543B1 (en) |
JP (1) | JPH11508832A (en) |
CN (1) | CN1115231C (en) |
BR (1) | BR9702252A (en) |
DE (2) | DE19617573A1 (en) |
WO (1) | WO1997042001A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19632218B4 (en) * | 1996-08-09 | 2007-08-23 | Robert Bosch Gmbh | sander |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6758731B2 (en) * | 2001-08-10 | 2004-07-06 | One World Technologies Limited | Orbital sander |
DE60316144T2 (en) * | 2002-12-03 | 2007-12-13 | S.C. Johnson & Son, Inc., Racine | MOTORALLY DRIVEN CLEANING / POLISHING DEVICE |
US7565712B2 (en) * | 2003-11-26 | 2009-07-28 | S.C. Johnson & Son, Inc. | Powered cleaner/polisher |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2193419A (en) * | 1938-06-27 | 1940-03-12 | Edward B George | Portable surfacing machine |
US3345784A (en) * | 1964-12-29 | 1967-10-10 | Rockwell Mfg Co | Orbital finishing sander |
DE3518984A1 (en) * | 1985-05-25 | 1986-11-27 | Festo KG, 7300 Esslingen | BALANCED ORBIT SANDER |
DE4233729A1 (en) * | 1992-10-07 | 1994-04-14 | Bosch Gmbh Robert | Eccentric disc grinder with grinding disc brake |
US5626510A (en) * | 1993-02-04 | 1997-05-06 | Robert Bosch Gmbh | Power tool for surface treatment |
DE4303044A1 (en) * | 1993-02-04 | 1994-08-11 | Bosch Gmbh Robert | Hand tool for surface processing |
US5607343A (en) * | 1994-08-22 | 1997-03-04 | Ryobi North America | Sander vibration isolator |
-
1996
- 1996-05-02 DE DE19617573A patent/DE19617573A1/en not_active Withdrawn
-
1997
- 1997-01-28 BR BR9702252A patent/BR9702252A/en not_active IP Right Cessation
- 1997-01-28 JP JP9539397A patent/JPH11508832A/en active Pending
- 1997-01-28 DE DE59705369T patent/DE59705369D1/en not_active Expired - Lifetime
- 1997-01-28 WO PCT/DE1997/000145 patent/WO1997042001A1/en active IP Right Grant
- 1997-01-28 CN CN97190470A patent/CN1115231C/en not_active Expired - Lifetime
- 1997-01-28 EP EP97915266A patent/EP0836543B1/en not_active Expired - Lifetime
- 1997-02-28 US US08/973,645 patent/US5855504A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19632218B4 (en) * | 1996-08-09 | 2007-08-23 | Robert Bosch Gmbh | sander |
Also Published As
Publication number | Publication date |
---|---|
US5855504A (en) | 1999-01-05 |
WO1997042001A1 (en) | 1997-11-13 |
DE59705369D1 (en) | 2001-12-20 |
CN1190363A (en) | 1998-08-12 |
EP0836543A1 (en) | 1998-04-22 |
DE19617573A1 (en) | 1997-11-06 |
CN1115231C (en) | 2003-07-23 |
JPH11508832A (en) | 1999-08-03 |
BR9702252A (en) | 1999-02-17 |
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