EP1518645A2 - Spannvorrichtung - Google Patents
Spannvorrichtung Download PDFInfo
- Publication number
- EP1518645A2 EP1518645A2 EP04104528A EP04104528A EP1518645A2 EP 1518645 A2 EP1518645 A2 EP 1518645A2 EP 04104528 A EP04104528 A EP 04104528A EP 04104528 A EP04104528 A EP 04104528A EP 1518645 A2 EP1518645 A2 EP 1518645A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- clamping
- clamping device
- shaped
- disc
- 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- Withdrawn
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
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating 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
- B24B45/00—Means for securing grinding wheels on rotary arbors
- B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
Definitions
- the invention relates to a clamping device for fixing at least one disc-shaped Tool on a drive shaft of a work machine, in particular on a drive shaft an electric motor driven hand tool, with an axially along the Drive shaft displaceable clamping device.
- EP 0 938 959 A1 discloses a clamping device for a plurality of disk-shaped tools known, in which the individual disc-shaped tools by means of spacer sleeves to each other kept at a distance and by tightening a nut on the drive shaft of the electrical appliance are fixed.
- the disadvantage of this solution is that for every distance, to have the disc-shaped tools, different spacers must be made available to the user. This also results in a given Grid spacing, which have the disc-shaped tools.
- this solution requires the use of external mounting aids, eg. A wrench, and thus puts a considerable amount of time when changing or replacing the disc-shaped tools.
- the object of the invention is a clamping device for fixing to a drive shaft a working machine, in particular on a drive shaft of an electric motor driven Hand tools, without the operator for the change or the Fixation of at least one disc-shaped tool external mounting aids, such as Wrench needed.
- the clamping device also several disc-shaped Tools on a drive shaft in a, largely variably adjustable Be fixable area.
- a fixing device for enforcing the at least one disk-shaped tool available, due to the axial displacement of the clamping device for fixing the at least one disc-shaped tool to the drive shaft radially is expandable
- the fixing device By actuating the axially displaceable along the drive shaft clamping device in the device side Direction, the fixing device expands radially.
- the at least one disc-shaped Tool is fixed by the clamping force acting on the drive shaft.
- the clamping means is preferably manually operable.
- the use of external assembly aids, like wrenches, for actuating the clamping device is omitted in the inventive Solution.
- the inventive clamping device preferably has an elongated Expansion in the axial direction of the drive shaft, whereby the at least one disc-shaped Tool in any area along the extension of the clamping device can be fixed.
- the acting clamping force serves on the one hand the axial fixing and on the other hand, the torque transmission of the drive shaft to the at least one disc-shaped Tool.
- this is at least one disc-shaped tool provided with a reinforced hub, so that, from the radially expanding fixing generated clamping force received by the at least one disc-shaped tool can be.
- a plurality of disk-shaped tools are simultaneously on the drive shaft the working machine can be fixed by means of the fixing device.
- the inventive Clamping device can be two or more disc-shaped tools in the same or be arranged at different distances from each other on the drive shaft and fixed. After the arrangement of the disc-shaped tools on the drive shaft in the desired Distance from each other are displaceable with actuation of the axially along the drive shaft Clamping device in the device side direction the disc-shaped tools simultaneously fixed to the drive shaft, or they are displaced upon release of the clamping means, removable and interchangeable.
- a slot device allows the inventive clamping device, the assembly of two cutting discs whose distance to each other and thus the slot width without tools and variable within a section, which is determined by the length of the axial extent of the fixing device set can be.
- the tensioning device comprises several, one behind the other switched fixing devices, which preferably together by means of axial displacement a clamping means are radially expandable.
- a disc-shaped Tool of one the more fixing devices on the drive shaft of the Machine fixed.
- Fixing devices can also handle more than one disc-shaped tool one of the fixing devices are arranged and fixed by this.
- the tensioning means is a screw means, optionally a guided through the fixing device Screw.
- the radial clamping force and the required effort for Actuation, or for axial displacement along the drive shaft of the Screwing are essentially determined by the selected thread ratio, where the thread can be designed as a right-hand or left-hand thread.
- the screw can be passed through the fixing and the Drive shaft be designed as a hollow shaft.
- the clamping device for example by means of the working machine, or the electric motor driven Hand tools are operated.
- the screw means preferably has a first thread, which engages with the drive shaft of the electric motor driven hand tool Can be brought, and a second thread, which with a pressure body for axial Displacement of the pressure hull is engageable.
- the pressure hull is activated the screw means axially offset along the drive shaft and thereby expands the fixing device radially on. It can be z.
- the first thread as a right-hand thread and the second Thread may be formed as a left-hand thread or vice versa.
- the first thread and the second thread running in the same direction, but with formed different thread pitches.
- the when operating the screwdriver resulting axial stroke is due to the difference between the two thread pitches to each other certainly.
- an advantageous higher translation results the force applied manually to the screwdriver.
- the fixing device preferably has a compressible, elastic body.
- the compressible, elastic body is advantageously an elastomer, such as a rubber or similar material.
- the function of this fixing follows the hydraulic principle, wherein the axially along the drive shaft displaceable screw means corresponds to the pressure generating piston.
- the axial pressurization stretches the compressible, elastic body radially out and jammed the at least one disc-shaped tool on the drive shaft.
- By actuating the axially along the Drive shaft displaceable screw means against the device-side direction eliminates the axial pressurization on the compressible, elastic body, resulting in this radially reduced and extends axially substantially to its original length.
- inventive clamping device diameter tolerances between the outer diameter of the tensioning device and the inner diameter of the hub be compensated for the at least one disc-shaped tool.
- the fixing device has at least two, on the compressible, elastic Body arranged on terminal strips.
- the terminal strips are for example as half shells Made of metal and ensure along the axial extent of the under Applying pressure radially expanding fixing a sufficient clamping force on the hub of the at least one disc-shaped tool. With the terminal strips It also prevents a substantial proportion of the radial extent of the fixing device next to the to be fixed, at least one disc-shaped tool acts and thereby a substantial proportion of the radial generated during the pressurization Clamping force not completely for fixing the at least one disc-shaped tool is used.
- the terminal strips preferably have a rotational engagement contour on their outer contour for the at least one disc-shaped tool.
- the hub of at least one Disk-shaped tool advantageously has a complementary contour to the Rotary engagement contour, which can be brought into engagement with the outer contour of the terminal strips is. This creates a form-locking moment driving.
- the Terminal strips on the outside provided with flats.
- the fixing device instead of a compressible, elastic body two axially mutually displaceable wedge-shaped cylinder sections on.
- the wedge-shaped cylinder sections are moved against each other and the at least one disc-shaped tool radially clamped at the hub diameter.
- the resulting radially acting clamping force is thereby substantially also by the Wedge angle determined.
- a screw is used as a clamping device, the generated radially acting clamping force also influenced by the thread translation.
- the clamping device according to the invention can have diameter tolerances between the outer diameter of the clamping device and the inner diameter of Hub of the at least one disc-shaped tool to be compensated.
- At least one of the contact surfaces between the axially mutually displaceable wedge-shaped cylinder sections on a spherical outer contour can also be larger tolerances or differences at the inner diameters of the hubs of the disc-shaped tools to be fixed compensate.
- all contact surfaces of the wedge-shaped cylinder sections to each other on a spherical outer contour Is a first disk-shaped Tool fixed, tilt the wedge-shaped cylinder sections with continuous operation of the clamping means about a contact point of the contact surfaces, which during the clamping process shifts along the contact surfaces between the wedge-shaped cylinder sections, and the fixing device can be fixed until the clamping of the other further widen the disk-shaped tools.
- the wedge-shaped cylinder sections at the outer contour of a Rotary engagement contour for the at least one disc-shaped tool.
- the hub of the at least one disc-shaped tool advantageously has a complementary contour on, which engages with the outer contour of the wedge-shaped cylinder sections can be brought. This creates a form-locking moment driving.
- the wedge-shaped cylinder sections are provided on the outside with flats.
- FIGS. 1 and 2 show a first exemplary embodiment of the tensioning device according to the invention shown.
- the clamping device 11 serves to fix two, as a disk-shaped Tools 1, such as cutting discs, on a drive shaft 2 of an electric motor driven Hand advocatess, such as a slit device, which arranged at a distance B to each other are.
- the tensioning device 11 comprises, as a fixing device, an elastomeric body 13 made of rubber, on the two trained as half-shells and made of metal terminal strips 12th are arranged, and an axially displaceable screw 14. Both terminal strips 12 are each area provided with a trained as a rotary driving contour 16 flattening.
- the axially reinforced hub 3 of the tool 1 has its inner diameter a complementary with the outer contour of the terminal strips 12 cooperating contour on.
- the elastomeric body 13 is pressurized, this radially widening due to the axial pressurization.
- the Screw 14 acts on the one hand via the internal thread 19 with a complementary trained external thread 20 of the drive shaft 2 and on the other hand with an external thread 17 with a complementarily formed internal thread 18 a of the pressure piece 18th together, so that due to a slope difference of the pressure piece 18 upon actuation of the Screwing means 14 is axially displaceable.
- the terminal strips 12 are doing with the hub 3 of the disc-shaped tools 1 jammed.
- About the rotary driving contours 16 to the Clamping strips 12 and on the inner diameter of the hubs 3 is a form-locking moment driving the disk-shaped tools 1 with the drive shaft 2 guaranteed.
- the Elastomer body 13 relieves, so that this expands axially and its extent decreases radially.
- the disk-shaped tools 1 can be in the axial direction of Move clamping device 11 and at a new distance B to each other by means of renewed Apply pressure to the elastomer body 13 again. In the relaxed state the elastomeric body 13, the disc-shaped tools 1 can also from the Drive shaft 2 removed, or replaced.
- FIG. 3 shows a variant according to the invention that described in FIGS. 1 and 2 Clamping device 11 is shown.
- the clamping device 21 has two axially as a fixing mutually displaceable wedge-shaped cylinder sections 22.
- the clamping screw 24 is passed through the wedge-shaped cylinder sections 22 and has a first counterclockwise External thread 27 for engagement with an internal thread 34 in the drive shaft 32nd and a second right-handed external thread 28 for engaging in an internal thread 36 a pressure body 35 on.
- the clamping screw 24 by means of operated by electric motor driven hand tool.
- the pressure body 35 Upon actuation of the clamping screw 24, the pressure body 35 is axially offset and the two wedge-shaped cylinder sections 22 are moved against each other, whereby the Clamping device 21 expands radially.
- the wedge-shaped cylinder sections 22 clamp engage with the hubs 33 of the disc-shaped tools 31 and create a clamping connection between the wedge-shaped cylindrical portions 22 and the hubs 33 of the disc-shaped Tools 31.
- the force acting on the disc-shaped tools 31 clamping force is mainly due to the chosen wedge angle a and the size of the thread translation the clamping screw 24 determined.
- the wedge-shaped cylinder sections 22 have on their outer contour a rotary driving contour 26 in the form of a flat, the form-fitting with a corresponding inner contour in the hub 33 cooperates.
- Fig. 4 shows a side view of a third embodiment of the inventive Tensioner.
- the clamping device 41 has as fixing two axially to each other displaceable wedge-shaped cylinder sections 42, which at their contact surfaces 43 each have a spherical outer contour.
- the clamping screw 44 is through the wedge-shaped Cylinder sections 42 passed and has a first external thread 47 for engagement in an internal thread 54 in the drive shaft 52 and a second external thread 48 for the engagement in an internal thread 56 of a pressure body 55.
- the first external thread 47, as well as the second external thread 48 are in the same direction, but the first External thread 47 has a greater thread pitch than the second external thread 48.
- the clamping device 41 can disc-shaped tools 51 and 57 with different inner diameters of the hubs 53, and 58 on the drive shaft 52, wherein by way of example the hub 53 for describing the operation has a smaller inner diameter than the hub 58.
- the pressure body 55 is axially offset and the two wedge-shaped Cylinder sections 42 are shifted from each other, whereby the clamping device 41st expands radially.
- the wedge-shaped cylinder portions 42 tilt about the point of contact 59.
- Bei the continuous operation of the clamping screw 44 the contact point 59 moves along the convex outer contour of the contact surfaces 43 of the wedge-shaped cylinder sections 42.
- the clamping device 41 may be until the wedge-shaped cylinder sections 42 with the hub 58 further widen. Despite the different inside diameters the hubs 53 and 58, the clamping device 41 allows the secure fixing of the disc-shaped Tools 51 and 57 on the drive shaft 52.
- the on the disc-shaped Tools 51 and 57 acting clamping force is essentially due to the difference chosen in the thread pitches of the first external thread 47 and the second external thread 48 determined on the clamping screw 44.
- the wedge-shaped cylinder sections 42 have on their outer contour a rotary driving contour 46 in the form of a flat, the form-fitting with a corresponding inner contour in the hubs 53 and 58 cooperates.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Jigs For Machine Tools (AREA)
Abstract
Description
- Fig. 1
- Eine Seitenansicht mit Partialschnittaufbruch auf ein erstes Ausführungsbeispiel der erfindungsgemässen Spannvorrichtung;
- Fig. 2
- einen Querschnitt entlang der Linie II-II in Fig. 1;
- Fig. 3
- eine Seitenansicht auf ein zweites Ausführungsbeispiel der erfindungsgemässen Spannvorrichtung; und
- Fig. 4
- eine Seitenansicht auf ein drittes Ausführungsbeispiel der erfindungsgemässen Spannvorrichtung.
Claims (10)
- Spannvorrichtung zur Fixierung zumindest eines scheibenförmigen Werkzeuges (1; 31; 51, 57) an einer Antriebswelle einer Arbeitsmaschine, insbesondere an einer Antriebswelle (2; 32; 52) eines elektromotorisch angetriebenen Handwerkzeuges, mit einem axial entlang der Antriebswelle (2; 32; 52) versetzbaren Spannmittel, dadurch gekennzeichnet, dass eine Fixiereinrichtung zum Durchsetzen des zumindest einen scheibenförmigen Werkzeuges (1; 31; 51, 57) vorhanden ist, die infolge axialem Versetzen des Spannmittels zum Fixieren des zumindest einen scheibenförmigen Werkzeuges (1; 31; 51, 57) an der Antriebswelle radial aufweitbar ist.
- Spannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass mehrere scheibenförmige Werkzeuge (1; 31; 51, 57) gleichzeitig an der Antriebswelle (2; 32; 52) der Arbeitsmaschine mittels der Fixiereinrichtung fixierbar sind.
- Spannvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Spannmittel ein Schraubmittel (14; 24; 44) ist.
- Spannvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Spannmittel ein durch die Fixiereinrichtung hindurchgeführtes Schraubmittel (24; 44) ist mit einem ersten Gewinde (27; 47), welches mit der Antriebswelle (32; 52) des elektromotorisch angetriebenen Handwerkzeuges in Eingriff bringbar ist, und mit einem zweiten Gewinde (28; 48), welches mit einem Druckkörper (35; 55) zum axialen Versetzen des Druckkörpers (35; 55) in Eingriff bringbar ist, wobei optional das erste Gewinde (47) und das zweite Gewinde (48) gleichsinnig verlaufend ausgebildet sind und unterschiedliche Gewindesteigungen aufweisen.
- Spannvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Fixiereinrichtung einen komprimierbaren, elastischen Körper (13) aufweist.
- Spannvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Fixiereinrichtung zumindest zwei, an dem komprimierbaren, elastischen Körper (13) angeordnete Klemmleisten (12) aufweist.
- Spannvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Klemmleisten (12) an deren Aussenkontur eine Drehmitnahmekontur (16) für das zumindest eine scheibenförmige Werkzeug (1) aufweisen.
- Spannvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Fixiereinrichtung zwei axial zueinander versetzbare keilförmige Zylinderabschnitte (22; 42) aufweist.
- Spannvorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass zumindest eine der Kontaktflächen (43) zwischen den axial zueinander versetzbaren keilförmigen Zylinderabschnitten (42) eine ballige Aussenkontur aufweist.
- Spannvorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die keilförmigen Zylinderabschnitte (22; 42) an deren Aussenkontur eine Drehmitnahmekontur (26; 46) für das zumindest eine scheibenförmige Werkzeug (31; 51, 57) aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10344989 | 2003-09-27 | ||
DE2003144989 DE10344989A1 (de) | 2003-09-27 | 2003-09-27 | Spannvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1518645A2 true EP1518645A2 (de) | 2005-03-30 |
EP1518645A3 EP1518645A3 (de) | 2006-03-08 |
Family
ID=34177996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04104528A Withdrawn EP1518645A3 (de) | 2003-09-27 | 2004-09-20 | Spannvorrichtung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1518645A3 (de) |
DE (1) | DE10344989A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1648032A (en) * | 1925-08-19 | 1927-11-08 | Guy W Vaughan | Expanding tool |
US3144738A (en) * | 1961-03-06 | 1964-08-18 | Merit Products Inc | Abrading apparatus |
US4555199A (en) * | 1982-11-25 | 1985-11-26 | Peter Maier | Support for endless grinding sleeves |
WO1994021428A1 (de) * | 1993-03-23 | 1994-09-29 | Gühring, Jörg | Anordnung zur zentrierten und axial fixierten aufnahme eines rotierenden körpers und zugehöriger adapter |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8717788U1 (de) * | 1987-06-05 | 1990-05-03 | Köppen, Detlef, 8000 München | Rotationsbürstenwerkzeug zur Oberflächenbearbeitung |
DE20017070U1 (de) * | 2000-10-02 | 2001-08-30 | Reinauer, Rita, 72488 Sigmaringen | Spannvorrichtung mit Spannschraube |
-
2003
- 2003-09-27 DE DE2003144989 patent/DE10344989A1/de not_active Ceased
-
2004
- 2004-09-20 EP EP04104528A patent/EP1518645A3/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1648032A (en) * | 1925-08-19 | 1927-11-08 | Guy W Vaughan | Expanding tool |
US3144738A (en) * | 1961-03-06 | 1964-08-18 | Merit Products Inc | Abrading apparatus |
US4555199A (en) * | 1982-11-25 | 1985-11-26 | Peter Maier | Support for endless grinding sleeves |
WO1994021428A1 (de) * | 1993-03-23 | 1994-09-29 | Gühring, Jörg | Anordnung zur zentrierten und axial fixierten aufnahme eines rotierenden körpers und zugehöriger adapter |
Also Published As
Publication number | Publication date |
---|---|
DE10344989A1 (de) | 2005-04-28 |
EP1518645A3 (de) | 2006-03-08 |
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