EP1684943A1 - Werkzeugaufnahmevorrichtung - Google Patents
WerkzeugaufnahmevorrichtungInfo
- Publication number
- EP1684943A1 EP1684943A1 EP04786847A EP04786847A EP1684943A1 EP 1684943 A1 EP1684943 A1 EP 1684943A1 EP 04786847 A EP04786847 A EP 04786847A EP 04786847 A EP04786847 A EP 04786847A EP 1684943 A1 EP1684943 A1 EP 1684943A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- tool holding
- leaf spring
- holding device
- spring unit
- 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
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
- B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/29—Details; Component parts; Accessories
- B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
- B27B5/32—Devices for securing circular saw blades to the saw spindle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T82/00—Turning
- Y10T82/25—Lathe
- Y10T82/2585—Tool rest
- Y10T82/2589—Quick release tool or holder clamp
Definitions
- the invention relates to a tool holder device according to the preamble of claim 1.
- DE 101 36 459 A1 discloses a generic tool holder for a hand-held angle grinder for an insert tool with a disk-shaped hub.
- the tool / tool receiving device has a driving device with a leaf spring, by means of which the insert tool can be tensioned in the axial direction.
- the invention is based on a tool holding device for an insert tool with an essentially disk-shaped hub, in particular for a hand-held angle grinding machine or a hand-held circular saw, with a Leaf spring unit entraining device with which the insert tool can be tensioned in the axial direction.
- the leaf spring unit have at least one free spring web which extends at least partially in the circumferential direction, as a result of which a space-saving leaf spring unit with an easily produced contour and with an advantageous force transmission can be achieved inexpensively.
- a free spring bar is to be understood as a spring bar with at least one free end.
- the spring bar is connected to a retaining ring via at least one at least substantially radially extending, in particular radially inwardly extending connecting bar, an advantageous, in particular easily predeterminable, stress profile can be achieved in the leaf spring unit.
- the spring bar could also extend outward and / or inward essentially without a radial connecting bar, for example in a spiral shape.
- the spring bar can be made of an additional component fastened to a retaining ring or can at least partially be made in one piece with a retaining ring, as a result of which additional components, assembly effort and costs can be saved.
- the connecting web and the spring web be at least substantially T-shaped and / or that the spring web have a decreasing width towards its free end.
- the spring web has at its free end a molded support surface formed by a flattened portion, power transmission can advantageously be achieved over a large area and, as a result, a small surface pressure, little wear and a long service life.
- the spring web have a thickness between 0.7 mm and 1.1 mm, as a result of which a high spring force can be achieved with an advantageous constellation of material costs and manufacturing costs.
- the leaf spring unit advantageously has at least one coding means which corresponds to the assembly with at least one component of the driving device to avoid incorrect assembly of the leaf spring unit, incorrect assembly being understood to mean, in particular, an inverted assembly. Damage and functional impairments caused by incorrect assembly can be avoided.
- the tool holding device advantageously comprises a drive shaft, which has at least one non-machined form-locking element for positive connection in the circumferential direction with a means, in particular with a driving flange of the driving device, for transmitting the drive torque.
- a drive shaft which has at least one non-machined form-locking element for positive connection in the circumferential direction with a means, in particular with a driving flange of the driving device, for transmitting the drive torque.
- It can be structurally simple and inexpensive to connect the drive shaft to the Driving device and the insert tool can be achieved, via which high torques can be transmitted, in particular in that large transmission surfaces can be achieved inexpensively without at least significant material weakening.
- the solution according to the invention is therefore particularly suitable for machines with high output, such as, in particular, for network machines.
- the drive shaft can in principle be formed by a motor shaft, an output shaft of a gear, in particular an angular gear, or by a shaft adjoining an output shaft of a gear in the direction of the
- the form-locking element can be formed by an integrally formed groove in which an additional, for example tooth-like transmission means could be fastened, as a result of which this
- the form-locking element can advantageously be used directly for contacting the means of the driving device, which can save additional components, assembly effort and costs.
- FIG. 1 shows a schematically illustrated angle grinding machine from above
- FIG. 2 shows an exploded drawing of a tool holding device with a hub of an insert tool
- FIG. 3 shows an enlarged illustration of a driving flange from FIG. 2
- FIG. 4 shows an enlarged illustration of a leaf spring unit from FIG. 2.
- Fig. 1 shows an angle grinder 32 from above with an electric motor, not shown, mounted in a housing 34.
- the angle grinder 32 is extended in the longitudinal direction via a first, integrated in the housing 34 on a side applied to an insert tool 14.
- the handle 36 and a second handle 40 attached to a gear housing 38 in the area of the insert tool 14 and extending transversely to the longitudinal direction.
- the insert tool 14 can be driven in rotation with the electric motor via an angular gear (not shown) and a tool receiving device comprising a drive shaft 16 and a driving device 12 (FIG. 2).
- the drive shaft 16 formed by an output shaft of the angular gear has three form-locking elements 100, which are formed without machining by means of an extrusion process, for positive connection in the circumferential direction 50, 52 with a driving flange 10, which forms a contact surface 30 for the insert tool 14, for transmission of drive torque.
- an internal thread is created
- the drive shaft 16 is reworked by turning, case hardened and then ground in certain areas, in particular in bearing areas.
- the form-locking elements 100 have a greater length 102 in the axial direction 64 of the drive shaft 16 than the height 104 and are formed with a rectangular cross-sectional area.
- the positive locking elements 100 of the drive shaft 16 engage the driving flange 10 for direct drive torque transmission in positive locking elements 106 formed on the inner circumference of the driving flange 10 formed by a sintered part and formed by continuous axial grooves (FIGS. 2 and 3).
- the driving flange 10 is through centers the outer surfaces of the interlocking elements 100 pointing outward in the radial direction.
- the driving flange 10 is supported on a collar 130 of the drive shaft 16 via a spacer element 108 formed by a sleeve.
- the spacer element 108 covers a transition 132 caused by production between an area at the free end of the drive shaft 16 characterized by the positive locking elements 100 and an area adjacent in the axial direction 64.
- a collar 26 is formed on the driving flange 10 on a side facing the insert tool 14, via which the insert tool 14 is centered radially with its centering bore 46 in the assembled state.
- Arranged on the collar 26 are three shaped elements 22 which are formed by projections which extend radially outwards.
- the molded elements 22, which are made in one piece with the collar 26, are arranged uniformly distributed over an outer circumference of the collar 26 and are at a distance 28 from the contact surface 30 in the axial direction 54, 64. With its end facing the insert tool 14, the collar 26 projects beyond the shaped elements 22 in the axial direction 54.
- a sheet metal plate 48 Arranged on a side of the driving flange 10 facing away from the insert tool 14 is a sheet metal plate 48 with three clamping hooks 56 which are uniformly distributed in the circumferential direction 50, 52 and are integrally formed and extend in the axial direction 54 for axially fixing the insert tool 14.
- the tensioning hooks 56 are formed on the sheet metal plate 48 in a bending process.
- the tensioning hooks 56 of the sheet metal plate 48 which have a hook-shaped extension with an inclined surface 94 pointing in the circumferential direction 52 at their free end, are then guided in the axial direction 54 through recesses 60 of the driving flange 10 (FIGS. 2 and 3).
- the leaf spring unit 58 is biased and the sheet metal plate 48 and the driving flange 10 are positively connected in the axial direction 54, 64 (Fig. 2 and 3).
- the sheet metal plate 48 is then, loaded by the leaf spring unit 58, 'supported on the contact surface 30 of the driving flange 10 via edges of the hook-shaped extensions which point axially in the direction facing away from the insert tool 14.
- the leaf spring unit 58 has three identical, free spring webs 110 which extend in the circumferential direction 50, 52 and which are each made in one piece with a retaining ring 114 via a radially inwardly extending connecting web 112 (FIG. 4).
- the connecting web 112 and the spring web 110 are essentially T-shaped, the spring web 110 being arch-shaped with two free ends and the connecting web 112 connecting to the spring web 110 in the middle thereof.
- the spring bar 110 has a decreasing width 120 toward its free ends 116, 118 and has a thickness 126 of approximately 0.9 mm.
- the leaf spring unit 58 rests with its retaining ring 114 on the driving flange 10, the spring webs 110, each starting from the connecting web 112 in the direction of their free ends 116, 118 being bent in the direction facing away from the driving flange 10 and being supported on the tabs 68 of the sheet metal plate 48.
- molded support surfaces 122, 124 formed from flats are formed on the free ends 116, 118 or the free ends 116, 118 of the spring bars 110 are slightly bent in the direction of the driving flange 10!
- coding means 128 are formed on the outer circumference of the retaining ring 114 in addition to the connecting webs 112 and correspond to the tensioning hooks 56 and bolts 20 of the driving device 12 during assembly. If the leaf spring unit 58 is mounted the wrong way round, the sheet metal plate 48 can be guided in a rotated position with its tension hooks 56 through recesses in the leaf spring unit 58, but then a driving plate 96 with its bolts 20 can no longer pass through the leaf spring unit 58 due to the coding means 128 be passed through.
- the bolts 20 are guided through tabs 68 formed on the circumference of the sheet metal plate 48, which have bores 70, and through through bores 72 located in the driving flange 10 and engage in the assembled state through the through bores 72.
- the form-locking elements 100 on the drive shaft 16 are in the positive locking elements 106 of the driving flange 10 are introduced. Furthermore, on the inner circumference of the driving plate 96, radially inwardly extending formations 134 are introduced into grooves 136 made on the outer circumference of the driving flange 10. The sheet metal plate 48 and the drive plate 96 are secured against rotation relative to one another by the bolts 20.
- the driving device 12 is secured on the drive shaft 16 with a screw 74.
- the insert tool 14 formed by a cutting disc has an essentially disc-shaped sheet metal hub 42 which is formed by a separate component and which has three uniformly distributed, cup-shaped recesses 76 in the circumferential direction 50, 52, which extend in the axial direction 54 and whose diameters are slightly larger than the diameter of the bolts 20.
- the sheet metal hub 42 has three recesses 78 which are uniformly distributed in the circumferential direction 50, 52 and extend in the circumferential direction 50, 52 and each have a narrow and a wide region 80, 82.
- the diameter of the centering bore 46 of the sheet metal hub 42 is selected such that the insert tool 14 can also be used with a conventional clamping system with a clamping flange and a spin can be clamped on a conventional angle grinder. So-called downward compatibility is ensured.
- the sheet metal hub 42 of the insert tool 14 has three shaped elements 24 which are distributed in the circumferential direction 50, 52 evenly over the circumference of the centering bore 46 (FIG. 2).
- the shaped elements 24 are formed by recesses.
- the shaped elements 22 of the tool holding device and the shaped elements 24 of the insert tool 14 are coordinated, corresponding shaped elements to simplify the assembly of the insert tool 14. Furthermore, the corresponding shaped elements 22, 24 form a coding means for avoiding the assembly of an inadmissible insert tool of the same kind Molded elements 22, 24 are coordinated with one another with regard to a diameter of the insert tool 14, so that insert tools for use in machines at high speed have a wide shaped element or a wide coding, and insert tools for use in machines at low speed have a narrow shaped element or a narrow coding.
- the sheet metal hub 42 of the insert tool 14 is firmly connected and pressed with an abrasive via a riveted connection and is made cup-shaped by means of a shape 44 pointing in the axial direction 64.
- the insert tool 14 When mounting the insert tool 14, the insert tool 14 with its centering bore 46 is placed on the part of the element 22 projecting beyond the shaped elements 22 in the axial direction 54 Bundles 26 pushed on and radially precentered. The insert tool 14 comes to rest on contact surfaces 84 of the shaped elements 22. Twisting the insert tool 14 in the circumferential direction 50, 52 brings the shaped elements 22, 24 to congruence. The insert tool 14 or the sheet metal hub 42 can then slide in the axial direction 64 in the direction of the contact surface 30, and the sheet metal hub 42 comes to rest on the bolt 20.
- a subsequent pressing of the sheet metal hub 42 against the contact surface 30 of the driving flange 10 causes the bolts 20 in the through bores 72 and the driving disk 96 to be axially displaced against the spring force of the spring element 18 on the drive shaft 16 in the direction 64 facing away from the insert tool 14 ,
- radially outwardly directed formations 86 of the drive plate 96 engage in corresponding locking pockets 88 of a bearing flange 90 which is fixedly connected to the gear housing 38 and lock the drive shaft 16.
- the sheet metal hub 42 can be rotated counter to a drive direction 98.
- the turning of the sheet metal hub 42 causes the sheet metal hub 42 with its edge of the centering bore 46 to be at a distance 28 between the shaped elements 22 and Sliding contact surface 30 of the driving flange 10 and can be secured by the shaped elements 22 in the axial direction against falling.
- the rotation of the sheet metal hub 42 causes the hook-shaped projections into the arcuate, narrow areas 80 of the recesses 78 in FIG.
- Sheet metal hub 42 are moved.
- the sheet metal plate 48 with the tensioning hook 56 is axially displaced in the direction 54 against the pressure of the leaf spring unit 58 by inclined surfaces, not shown, until bearing surfaces of the hook-shaped extensions come into contact laterally in the arcuate, narrow areas 80 next to the recesses 78 of the sheet metal hub 42.
- arc-shaped grooves 138 are introduced into the contact surface 30 of the driving flange 10, via which undesired particles lying on the contact surface 30 can be conveyed outward from the driving device 12.
- the pressure of the spring element 18 causes the drive plate 96 to slide upward.
- the bolts 20 snap into the cup-shaped recesses 76 of the sheet metal hub 42 and secure them in a form-fitting manner in the circumferential direction 50, 52.
- the formations 86 of the drive plate 96 disengage from the locking pockets 88 of the bearing flange 90 and release the drive shaft 16.
- an unlocking button 92 is pressed in the axial direction 64.
- the release button 92 presses the drive plate 96 in the axial direction 64, and the formations 86 of the drive plate 96 come into engagement with the locking pockets 88.
- the drive shaft 16 is locked.
- the bolts 20 disengage from the recesses 76 in the sheet metal hub 42, and the sheet metal hub 42 can be rotated in the circumferential direction 52 until the tensioning hooks 56 can slide through the recesses 78.
- the shaped elements 22, 24 come into a corresponding position, and the sheet metal hub 42 can be removed in the axial direction 54.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10352288A DE10352288A1 (de) | 2003-11-08 | 2003-11-08 | Werkzeugaufnahmevorrichtung |
PCT/DE2004/002131 WO2005049271A1 (de) | 2003-11-08 | 2004-09-24 | Werkzeugaufnahmevorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1684943A1 true EP1684943A1 (de) | 2006-08-02 |
EP1684943B1 EP1684943B1 (de) | 2008-01-23 |
Family
ID=34559513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04786847A Expired - Fee Related EP1684943B1 (de) | 2003-11-08 | 2004-09-24 | Werkzeugaufnahmevorrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US7739932B2 (de) |
EP (1) | EP1684943B1 (de) |
CN (1) | CN100563925C (de) |
DE (2) | DE10352288A1 (de) |
WO (1) | WO2005049271A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9283655B2 (en) * | 2013-09-27 | 2016-03-15 | Mike Olari | Liquid diffuser adapter for center fed wet stone fabrication machine |
JP6425912B2 (ja) * | 2014-05-09 | 2018-11-21 | 株式会社マキタ | 電動工具 |
EP3202533A1 (de) * | 2016-02-02 | 2017-08-09 | HILTI Aktiengesellschaft | Spannvorrichtung |
RU2736767C2 (ru) * | 2016-08-22 | 2020-11-19 | Роберт Бош Гмбх | Быстрозажимное устройство для переносной технологической машины, в частности для угловой шлифовальной машины |
CN108500839B (zh) * | 2018-03-02 | 2020-05-22 | 陈中友 | 一种用于建筑装修的打磨机 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3270467A (en) * | 1963-07-01 | 1966-09-06 | Merit Products Inc | Abrasive device |
DE1577422A1 (de) * | 1963-11-26 | 1970-04-09 | Mac Kay Jun Joseph Hartley | Schleifkoerperhalterung mit Verriegelungsvorrichtung fuer den eingespannten Schleifkoerper |
US4919023A (en) * | 1988-03-22 | 1990-04-24 | Bloink Harry W | Quick-change tool adapter |
US5054344A (en) * | 1990-02-01 | 1991-10-08 | Kennametal Inc. | Quick change clamping mechanism |
GB2289742B (en) * | 1994-05-27 | 1998-12-09 | Western Atlas Uk Ltd | Drive transmitting device |
GB0026051D0 (en) * | 2000-10-25 | 2000-12-13 | Universal Drilling And Cutting | Arbor |
DE10136459A1 (de) | 2001-07-26 | 2003-02-13 | Bosch Gmbh Robert | System mit einer Werkzeugaufnahme |
DE10222292A1 (de) * | 2002-05-18 | 2003-12-04 | Bosch Gmbh Robert | System mit einer Werkzeugaufnahme |
DE10326928B4 (de) * | 2003-06-16 | 2009-07-02 | MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG | Schnittstelle zwischen zwei Teilelementen eines Werkzeugsystems |
-
2003
- 2003-11-08 DE DE10352288A patent/DE10352288A1/de not_active Withdrawn
-
2004
- 2004-09-24 DE DE502004006074T patent/DE502004006074D1/de active Active
- 2004-09-24 US US10/564,668 patent/US7739932B2/en not_active Expired - Fee Related
- 2004-09-24 EP EP04786847A patent/EP1684943B1/de not_active Expired - Fee Related
- 2004-09-24 CN CNB2004800327234A patent/CN100563925C/zh not_active Expired - Fee Related
- 2004-09-24 WO PCT/DE2004/002131 patent/WO2005049271A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2005049271A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN100563925C (zh) | 2009-12-02 |
CN1874873A (zh) | 2006-12-06 |
WO2005049271A1 (de) | 2005-06-02 |
DE10352288A1 (de) | 2005-06-09 |
US7739932B2 (en) | 2010-06-22 |
EP1684943B1 (de) | 2008-01-23 |
US20070272064A1 (en) | 2007-11-29 |
DE502004006074D1 (de) | 2008-03-13 |
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