EP1358965A2 - Oszillationsantrieb - Google Patents
Oszillationsantrieb Download PDFInfo
- Publication number
- EP1358965A2 EP1358965A2 EP03007185A EP03007185A EP1358965A2 EP 1358965 A2 EP1358965 A2 EP 1358965A2 EP 03007185 A EP03007185 A EP 03007185A EP 03007185 A EP03007185 A EP 03007185A EP 1358965 A2 EP1358965 A2 EP 1358965A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- drive shaft
- drive according
- tool
- oscillating drive
- 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
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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
-
- 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 relates to an oscillation drive with a housing, in which a rotatingly driven drive shaft of which driven eccentric element, as well as a tool drive shaft are included, the eccentric element with the Tool drive shaft is coupled via a swivel element to to drive the tool drive shaft oscillating about its longitudinal axis.
- oscillation drives have been in use for a long time, to special especially with hand-held power tools To be able to do tasks. This is how machine tools become such oscillation drives for numerous grinding and Polishing tasks, for cutting, e.g. to remove the adhesive bead of glued windshields, for sawing, about of body panels, and the like.
- An oscillation drive according to the type mentioned at the beginning is, for example, from US-A-5 993 304 known.
- Such an oscillation drive as well as that from EP-A 0 372 376 known oscillation drives has a relative high noise level and low efficiency.
- the vibrations felt by the user are also dependent on the load of the tool relatively strong.
- the invention is therefore based on the object of an improved To create oscillation drive which is more efficient and in which the noise development compared conventional oscillation drives is reduced. Also The vibrations felt by the user should be as far as possible be subdued.
- This task is performed with an oscillation drive according to the mentioned type solved in that the pivot element its end facing away from the tool drive shaft on both outer sides clamped against the housing via a spring element is.
- this is preferred in connection with the a spring mass system designed as compression springs created by swinging back and forth of the swivel element, the kinetic energy of the swivel element alternating in potential spring energy (energy of the elastic change in shape of the spring) and in each case after “Driving through” the movement dead positions again in kinetic energy of the swivel element is converted.
- the spring elements delay the pivoting element towards the dead positions, as well as accelerating the swivel element, after the deadlocks were overcome. So they will necessary, from the eccentric element to the swivel element transmitting forces and the necessary power, as well as that of Subjectively noticeable vibration of the oscillation drive reduced.
- the two spring elements are expediently constructed identically.
- the spring seat surfaces which are preferably made of hardened steel, can be designed as inserts on the housing side are inserted into the housing wall.
- At least one of the A cylindrical recess in which the associated spring element engages for centering is
- the spring elements are preferably as coil springs or designed as disc springs.
- the spring elements themselves are preferably made of tempered Valve spring.
- the eccentric element with a spherical outer surface in an at least in sections cylindrical inner surface of the swivel element guided.
- FIGS. 1 and 2 A machine tool according to the invention is shown in FIGS. 1 and 2 shown and designated overall by the number 10. It is a hand-held machine tool in which the tool 40 with a high frequency of about 5,000 to 30,000 Vibrations per minute and a small swivel angle of approx 0.5 to 7 ° about the longitudinal axis 32 of a tool drive shaft 30 is driven, as indicated by the double arrow 34.
- Such a machine tool 10 can be used to carry out the various kinds of work are used, especially for Grinding or polishing, for cutting, for sawing and the like.
- the machine tool 10 has an overall number 12 designated oscillation drive through which a rotating Movement of a drive shaft driven by an electric motor 16 18 into the oscillation of the tool drive shaft 30 is implemented.
- the tool drive shaft 30 is rectangular arranged to the drive shaft 18.
- the oscillation drive 12 has an eccentric element 20, that on a cylindrical eccentric portion 24 of the drive shaft 18 is held. From the eccentric element 20 is a Swivel element 28 driven with the tool drive shaft 30 is firmly connected (in Fig. 1 is the end of the pivot element 28 in the area of the eccentric element 20 not in the Cutting plane and is therefore not recognizable). On the cylindrical Eccentric section 24 is a needle bearing 52 with an axial Game held, the outer ring 54 has a spherical outer surface 22 has.
- the swivel element 28 is on its end 56 opposite the tool drive shaft 30 formed in the shape of a fork, the inner surface 58 of which is cylindrical is formed, the cylinder axis parallel to Longitudinal axis 32 of the tool drive shaft 30 extends.
- This one for Drive shaft 18 open cylinder encloses the spherical Outer ring 54 of needle bearing 52.
- the low, uniform and flat wear on the spherical Outer ring 54 of the needle bearing 52 allows in general a longer lifespan of the oscillation drive in comparison to conventional oscillation drives, even with higher ones transferring services.
- the Outer ring 54 of the needle bearing 52 and the pivot member 28 Steel materials with hardened surfaces or other hard and at the same time sufficiently tough materials (e.g. hard metals, ceramic special materials, etc.).
- sufficiently tough materials e.g. hard metals, ceramic special materials, etc.
- the inner surface of the Swivel element 28 may be provided with a Teflon coating.
- Fig. 1 is also the storage of the drive shaft 18 in adjoining the cylindrical eccentric section 24 Area recognizable with the help of a bearing 26 on the housing 14.
- the outer end of the tool drive shaft 30 is a receiving flange 44 designed for fastening a tool 40.
- this can be a triangular-shaped sanding pad act with the help of a mounting flange 46 in a central area against a fastening screw 48 the receiving flange 44 is clamped.
- the fastening screw 48 into a thread 42 of the tool drive shaft 30 screwed in.
- the outer surface of the tool 40 can, for example. a Velcro-receiving surface for attaching a Have sandpaper.
- the pivot element 28 is namely in the area of the tool drive shaft 30 opposite end 56 on both Pages braced by spring elements 60, 62 relative to the housing 14.
- the two spring elements 60, 62 identically constructed and as strong coil springs with high Trained spring force.
- a spring seat surface 64, 66 is provided, of which from a cylindrical projection 68 or 70 in the direction of the protrudes opposite respective housing wall. This Projection 68 or 70 serves to center the respective Spring element 60 or 62 on its inside.
- spring elements 60 and 62 supported on spring seat surfaces 72 and 74, respectively. These spring seats are formed on inserts 80 and 82 which in the Housing 14 are inserted. Again stand out from the spring seats 72 or 74 cylindrical projections 76 or 78 for each Spring element 60 or 62 out to the spring elements Center 60 or 62.
- the pivot element 28 and the inserts 80 and 82 are preferably made made of hardened steel.
- the spring elements 60, 62 exist preferably made of tempered spring steel to prevent wear to keep the spring elements 60, 62 low even in continuous operation.
- the overall efficiency is reduced by the spring elements 60, 62 the implementation of the rotating drive movement of the drive shaft 18 in the oscillating movement of the tool drive shaft 30 improved.
- the pivot element 28 By partially compensating for acceleration the pivot element 28 necessary, inertia-related Forces the noise emission is reduced and the warming of the oscillation drive is reduced. Also be the vibrations generated by the oscillation drive can be felt reduced.
- the energy-reducing and vibration-reducing characteristics of the Spring system that cooperate with the eccentric element 20 with the swivel element 28 and the two spring elements 60, 62 is formed by a suitable, relatively high bias the spring elements 60, 62 reached.
- the high preload forces enable continuous trouble-free function (low natural vibration behavior and high dynamics) of the spring elements 60, 62, with low to very high number of vibrations Swivel element 28.
- the spring elements 60, 62 act against each other, behave the prestressed compression springs in the work area like one tension-compression spring acting on the swivel element, via a twice the spring constant compared to the individual compression springs features. This means that the necessary spring forces are reached and spring constants with fewer or significantly smaller springs. Because of the relatively small amplitudes are general very high spring constants necessary, so that the previously described Property of the spring arrangement is basically advantageous is.
- the force F is on the ordinate with respect to the path 1 ablated on the abscissa.
- the two spring characteristics are represented by the lines R 1 and R 2 for the two spring elements.
- the resulting spring characteristic R 1 + R 2 has a correspondingly higher slope.
- the working area of the two spring elements is hatched in FIG. 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Gripping On Spindles (AREA)
Abstract
Description
- Fig. 1
- In Fig. 1 ist eine erfindungsgemäße Werkzeugmaschine mit einem Oszillationsantrieb im Längsschnitt im Bereich des Oszillationsantriebes dargestellt;
- Fig. 2
- einen Querschnitt durch die Werkzeugmaschine gemäß Fig. 1 im Bereich des Oszillationsantriebes und
- Fig. 3
- eine Darstellung der Federkräfte über dem Federweg zur Erläuterung der Kraftverhältnisse an den Federelementen.
Claims (13)
- Oszillationsantrieb mit einem Gehäuse (14), in dem eine rotierend angetriebene Antriebswelle (18), ein davon angetriebenes Exzenterelement (20), sowie eine Werkzeugantriebswelle (30) aufgenommen sind, wobei das Exzenterelement (20) mit der Werkzeugantriebswelle (30) über ein Schwenkelement (28) gekoppelt ist, um die Werkzeugantriebswelle (30) um deren Längsachse (32) oszillierend anzutreiben, dadurch gekennzeichnet, daß das Schwenkelement (28) an seinem der Werkzeugantriebswelle (30) abgewandten Ende (56) an beiden Außenseiten über je Federelement (60, 62) gegen das Gehäuse (14) verspannt ist.
- Oszillationsantrieb nach Anspruch 1, dadurch gekennzeichnet, daß die Federelemente (60, 62) als Druckfederelemente ausgebildet sind.
- Oszillationsantrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Federelemente (60, 62) identisch aufgebaut sind.
- Oszillationsantrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß an den Außenseiten des Schwenkelementes (28) und an den zugeordneten Gehäuseabschnitten Federsitzflächen (64, 66, 72, 74) vorgesehen sind, die zur Aufnahme und Zentrierung der Federelemente (60, 62) ausgebildet sind.
- Oszillationsantrieb nach Anspruch 4, dadurch gekennzeichnet, daß die Federsitzflächen (72, 74) gehäuseseitig an Einsätzen (80, 82) ausgebildet sind, die in das Gehäuse (14) eingelegt sind.
- Oszillationsantrieb nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß zumindest eine der Federsitzflächen (64, 66, 72, 74) einen zylindrischen Vorsprung (68, 70) aufweist, der in das zugeordnete Federelement (60, 62) zur Zentrierung eingreift.
- Oszillationsantrieb nach Anspruch 4, 5 oder 6, dadurch gekennzeichnet, daß zumindest eine der Federsitzflächen (64, 66, 72, 74) eine zylindrische Vertiefung aufweist, in die das zugeordnete Federelement (60, 62) zur Zentrierung eingreift.
- Oszillationsantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Federelemente (60, 62) als Schraubenfedern oder Tellerfedern ausgebildet sind.
- Oszillationsantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Federsitzflächen (64, 66, 72, 74) aus gehärtetem Stahl bestehen.
- Oszillationsantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Federelemente (60, 62) aus vergütetem Ventilfederstahl bestehen.
- Oszillationsantrieb nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Exzenterelement (20) mit einer sphärischen Außenfläche (22) in einer zumindest abschnittsweise zylindrischen Innenfläche (58) des Schwenkelementes (28) geführt ist.
- Oszillationsantrieb nach Anspruch 11, dadurch gekennzeichnet, daß das Exzenterelement (20) einen zylindrischen Abschnitt (24) aufweist, auf dem ein Nadellager (52) aufgenommen ist, das mit einem sphärischen Außenring (54) an der Innenfläche (58) des Schwenkelementes (28) geführt ist.
- Werkzeugmaschine, insbesondere Schleif- oder Schneidmaschine (10) mit einem Oszillationsantrieb (12) nach einem der vorhergehenden Ansprüche.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002120325 DE10220325B4 (de) | 2002-04-30 | 2002-04-30 | Oszillationsantrieb |
DE10220325 | 2002-04-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1358965A2 true EP1358965A2 (de) | 2003-11-05 |
EP1358965A3 EP1358965A3 (de) | 2004-04-07 |
EP1358965B1 EP1358965B1 (de) | 2011-01-05 |
Family
ID=28799018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030007185 Expired - Lifetime EP1358965B1 (de) | 2002-04-30 | 2003-03-29 | Oszillationsantrieb |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1358965B1 (de) |
DE (2) | DE10220325B4 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009011312U1 (de) * | 2009-08-11 | 2010-12-23 | C. & E. Fein Gmbh | Handwerkzeug mit einem Oszillationsantrieb |
EP2594364A1 (de) * | 2011-11-15 | 2013-05-22 | C. & E. Fein GmbH | Oszillationsantrieb |
EP2436485A3 (de) * | 2010-09-17 | 2013-12-04 | C. & E. Fein GmbH | Handwerkzeug |
DE102014119141A1 (de) | 2014-12-19 | 2016-06-23 | C. & E. Fein Gmbh | Oszillierend antreibbare Werkzeugmaschine |
DE102016123266A1 (de) | 2016-12-01 | 2018-06-07 | C. & E. Fein Gmbh | Rotorwelle für einen Elektromotor |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011104901B4 (de) * | 2011-06-16 | 2018-04-12 | C. & E. Fein Gmbh | Kraftgetriebene Handwerkzeugmaschine |
DE102014101827A1 (de) | 2014-02-13 | 2015-08-13 | C. & E. Fein Gmbh | Bohrmaschine und Bohrwerkzeug hierfür |
DE102014102128A1 (de) | 2014-02-19 | 2015-08-20 | C. & E. Fein Gmbh | Oszillationsantrieb |
DE102014212794A1 (de) | 2014-07-02 | 2016-01-07 | Robert Bosch Gmbh | Oszillationsantriebsvorrichtung |
DE102015103097A1 (de) | 2015-03-04 | 2016-09-08 | C. & E. Fein Gmbh | Handgeführtes Oszillationswerkzeug |
DE102017124745A1 (de) | 2017-10-23 | 2019-04-25 | C. & E. Fein Gmbh | Oszillationsantrieb mit verstellbarem Oszillationswinkel |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US409052A (en) * | 1889-08-13 | Implement for reducing stone | ||
US3973444A (en) * | 1974-09-05 | 1976-08-10 | Textron, Inc. | Hand-held oscillating tool |
EP0372376A2 (de) * | 1988-12-06 | 1990-06-13 | C. & E. FEIN GmbH & Co. | Oszillationsantrieb |
US5607343A (en) * | 1994-08-22 | 1997-03-04 | Ryobi North America | Sander vibration isolator |
US5993304A (en) * | 1995-10-18 | 1999-11-30 | Ab Dentatus | Hand-held apparatus for sideways driving of a tool |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3840595C1 (de) * | 1988-12-02 | 1989-10-12 | Maschinenfabrik Ernst Thielenhaus Gmbh, 5600 Wuppertal, De |
-
2002
- 2002-04-30 DE DE2002120325 patent/DE10220325B4/de not_active Expired - Fee Related
-
2003
- 2003-03-29 EP EP20030007185 patent/EP1358965B1/de not_active Expired - Lifetime
- 2003-03-29 DE DE50313381T patent/DE50313381D1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US409052A (en) * | 1889-08-13 | Implement for reducing stone | ||
US3973444A (en) * | 1974-09-05 | 1976-08-10 | Textron, Inc. | Hand-held oscillating tool |
EP0372376A2 (de) * | 1988-12-06 | 1990-06-13 | C. & E. FEIN GmbH & Co. | Oszillationsantrieb |
US5607343A (en) * | 1994-08-22 | 1997-03-04 | Ryobi North America | Sander vibration isolator |
US5993304A (en) * | 1995-10-18 | 1999-11-30 | Ab Dentatus | Hand-held apparatus for sideways driving of a tool |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009011312U1 (de) * | 2009-08-11 | 2010-12-23 | C. & E. Fein Gmbh | Handwerkzeug mit einem Oszillationsantrieb |
US8397832B2 (en) | 2009-08-11 | 2013-03-19 | C. & E. Fein Gmbh | Hand tool machine having an oscillatory drive |
EP2436485A3 (de) * | 2010-09-17 | 2013-12-04 | C. & E. Fein GmbH | Handwerkzeug |
US8757285B2 (en) | 2010-09-17 | 2014-06-24 | C. & E. Fein Gmbh | Portable oscillatory power tool with planetary gear |
EP2594364A1 (de) * | 2011-11-15 | 2013-05-22 | C. & E. Fein GmbH | Oszillationsantrieb |
DE102014119141A1 (de) | 2014-12-19 | 2016-06-23 | C. & E. Fein Gmbh | Oszillierend antreibbare Werkzeugmaschine |
DE102016123266A1 (de) | 2016-12-01 | 2018-06-07 | C. & E. Fein Gmbh | Rotorwelle für einen Elektromotor |
Also Published As
Publication number | Publication date |
---|---|
DE10220325B4 (de) | 2011-06-01 |
EP1358965B1 (de) | 2011-01-05 |
DE10220325A1 (de) | 2003-11-13 |
DE50313381D1 (de) | 2011-02-17 |
EP1358965A3 (de) | 2004-04-07 |
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