EP1697086A1 - Insertion tool for an angle grinder - Google Patents
Insertion tool for an angle grinderInfo
- Publication number
- EP1697086A1 EP1697086A1 EP04820605A EP04820605A EP1697086A1 EP 1697086 A1 EP1697086 A1 EP 1697086A1 EP 04820605 A EP04820605 A EP 04820605A EP 04820605 A EP04820605 A EP 04820605A EP 1697086 A1 EP1697086 A1 EP 1697086A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fastening means
- hub
- insert tool
- fastening
- driving device
- 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
- 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
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/16—Bushings; Mountings
Definitions
- the invention is based on an insert tool for an angle grinder according to the preamble of claim 1.
- the invention is based on a system comprising an insert tool with a hub and a driving device for an angle grinder according to the preamble of claim 11.
- a generic insert tool for an angle grinder is known from WO 03/097299, which has a hub with several fastening means formed by recesses.
- the insert tool can advantageously be clamped to a driving device of the angle grinder by means of a quick-action clamping system, which is also known from the above-mentioned document.
- the invention is based on an insert tool for an angle grinder that has a hub with at least one attachment. has means for attaching the hub to a driving flange of the angle grinder.
- the invention is also based on a system comprising an insert tool with a hub and a driving device for an angle grinder, wherein the hub has at least one first fastening means and the driving device has at least one first fastening element for interacting with the first fastening means and for fastening the hub to the driving device ,
- the first fastening means be arranged on a pitch circle with a radius between 12 mm and 25 mm.
- an insert tool can be achieved which can be securely and easily mounted on an angle grinder, in particular with a quick-action clamping system, and also a handy insert with sufficient Working material enables.
- An insert tool which is advantageously coordinated in itself and with the driving flange can be achieved, and advantageous force distributions in the insert tool and to the driving flange can be achieved during a working application with the insert tool.
- the solution according to the invention can be used in all of the insert tools for angle grinders which appear to be suitable to the person skilled in the art, such as, for example, rubber plates, Cutting discs, grinding discs, grinding discs, etc.
- the hub can be made from the material of the grinding body or from another material, such as a steel sheet.
- FIG. 1 shows an angle grinder with a cutting disc
- FIG. 2 shows a hub of the cutting disc of the angle grinder
- FIG. 3 shows a driving flange of the angle grinder
- FIG. 4 shows a top view of the hub from FIG. 2
- FIG 6 shows a plan view of the driving flange from FIG. 2.
- Figure 1 shows an angle grinder 2 from above with an electric motor mounted in a housing 4, not shown.
- the angle grinder 2 can be guided using two handles 6, 8.
- An insert tool 12 can be driven in the direction of rotation 14 via the electric motor, a gear (not shown) in a gear housing 10 and a drive shaft (likewise not visible).
- a hub 16 of the insert tool 12 is visible.
- This hub is shown in FIG. 2 in a perspective view.
- the fastening means 20 are arranged in a radial outer region of the hub 16 on a second pitch circle which runs completely in the region of the hub material. No recesses are thus arranged between the fastening means 20, as a result of which a stable outer region of the hub 16 can be achieved.
- the hub 16 of the insert tool 12 designed as a grinding wheel is provided for mounting on a driving device 22 of the angle grinder 2, which is shown in FIG. 3.
- This driving device 22 comprises a centering collar 24, onto which the hub 16 with a centering opening 26 can be attached. After such an attachment, the radially innermost part of the hub 16 lies on three encoder bases. Exercises 28, which extend radially outward from the centering collar 24.
- the hub 16 lying on these coding elevations 28 can be rotated in the tangential direction 30 until three radial recesses 32 overlap the three coding elevations 28. In this position, the hub 16 - and with it the entire insert tool 12 - falls somewhat lower until it comes to rest on three locking bolts 36 with its inner plate 34.
- the hub 16 can now be rotated clockwise, as a result of which a radially innermost region 44 of the lower plate 34 can be passed under the coding elevations 28.
- a holding area 46 of the lower plate 34 which is adjacent to the openings 42, is pushed under an obliquely aligned ramp element 48 of the fastening element 40, the fastening element 40 being pulled slightly upward against the force of a prestressed spring (not shown).
- the holding area 46 When turning the insert tool 12 clockwise, the holding area 46 is pushed under a holding element 50 which is aligned parallel to the bottom 38 of the driving device 22 and which presses the hub 16 onto the bottom 38 with the aid of the prestressed spring (not shown).
- the locking bolts 36 When a fastening position is reached, the locking bolts 36 come into congruence with pot-like depressions 52 of the hub 16 and snap into these depressions 52 due to a rapid rise.
- the depressions 52 are designed as formations of the lower plate 34, so that they can be seen in FIG. 2 as cylindrical elevations.
- the hub 16 and with it the entire insert tool 12 are now fixed in the tangential direction 30 by the locking bolts 36 in the pot-like recesses 52 and held in the axial direction by the spring-loaded holding elements 50.
- FIG. 4 shows the hub 16 of the insert tool 12 in a plan view.
- the hub 16 comprises three identical first fastening means, designed as pot-like depressions 52, which protrude from the plane of the drawing in plan view.
- the pot-like depressions 52 have a circular cross section, the center of which lies on a pitch circle 54 which has a radius 56 of 16.7 mm.
- the cup-shaped depressions 52 have a circular cross section with an inner diameter 58 of 6 mm (FIG. 5) and an inner depth 60 of 3.85 mm.
- the hub 16 also comprises three identically designed openings 42 as second fastening means.
- These second fastening means are formed in the form of two elongated holes, which are in the tangential direction 30 and parallel to one another are aligned.
- the elongated holes are essentially rectangular and partially adjoin one another on one of their long sides.
- the openings 42 comprise a first holding area 62, formed by the radially inner elongated hole, which has a radial width 64 of 3.9 mm.
- the opening 42 In a release area 66 formed by both elongated holes, the opening 42 has a radial width 68 of 7.1 mm.
- the radial width 72 of the opening 42 is 3.4 mm.
- the three openings 42 each extend over an angular range 74 of approximately 60 °.
- the openings 42 furthermore have locking elements 76 designed as bulges, which in each case limit the radially inner elongated hole and protrude into the release area 66.
- the locking elements 76 in turn have a stop 78, which for
- Limitation of a release movement of the fastening element 40 is provided in the opening 42.
- the openings 42 are formed by two rectangular elongated holes, a particularly stable mounting of the hub 16 on the driving device 22 in the axial direction can be achieved with fastening elements 40 which can be carried out simply and inexpensively.
- fastening elements 40 which can be carried out simply and inexpensively.
- reverse mounting of the insert tool 12 on an identical driving flange without coding elevations 28 can be effectively prevented, since the fastening element 40 with the dimensions indicated below cannot be carried out through an opening 42 arranged reverse side.
- the dimensions of the opening 42 and its position relative to the recesses 32 are designed such that when the web 82 strikes the stop 78, the recesses 32 are aligned with the coding elevations 28. In this position, the hub 16 can be lifted off the driver device 22. Due to the shape and dimensions of the opening 42 with the blocking element 76 and the third region 70, the fastening element 40 can have the holding element 50 which projects further in the release direction than the web 82 of the fastening element 40. This enables a particularly simple and inexpensive production of a stable fastening element 40 and a stable mounting of the hub 16 on the driving device 22.
- the hub 16 is in its radially inner region with a cup-shaped depression 84 with a cup depth 86 of approximately
- the openings 42 are at a minimum distance 90 of approximately 2 mm from a cup wall 88 formed in this way. This relatively far radially outer positioning of the openings 42 within the hub 16 allows one stable axial fixation of the hub 16 on the driving device 22 can be achieved by the holding elements 50.
- the locking bolts 36 designed as fastening elements snap into the recesses 52
- the locking bolts 36 which have an outer diameter 94 of 5.5 mm, are arranged in the recesses 52 with a play of 0.5 mm. With this relatively large amount of play, it can be achieved that the locking bolts 36 also snap into the recesses 52 when the locking bolts 36 or the recesses 52 are heavily soiled. In this way, a secure fixation of the insert tool 12 in the tangential direction 30 can be ensured even when the insert tool 12 is heavily soiled.
- the hub 16 cannot be held centered on the driving device 22 by the locking bolts 36.
- Such a necessary centering is achieved by dimensioning the centering opening 26 and the centering collar 24, the play of which is less by a factor of 17 than the play between the locking bolts 36 and the recesses 52.
- the inner radius 96 of the centering opening 26 is 11.1 mm
- the outer radius 98 of the centering collar 24 is 11.115 mm. Since both the centering collar 24 and the centering aperture 26 are circular, the play between the centering collar 24 and the centering aperture 26 is 0.03 mm.
- the locking bolts 36 Due to the relatively large play between the locking bolts 36 and the recesses 52, the contact surface which can be achieved by an elastic deformation is between the locking bolts 36 and Wells 52 very small in the operation of the insert tool 12. So that the resultant wear of the locking bolts 36 remains as low as possible, the locking bolts 36 are made of hardened steel, whereas the recesses 52 of the hub 16 are made of an unhardened metal, for example an unhardened steel sheet. During operation of the insert tool 12, the locking bolts 36 can press into the recesses 52 and deform them somewhat, so that a sufficiently large contact surface is formed between the locking bolt 36 and the recess 52, which causes the locking bolts 36 to wear even when the insert tool is subjected to strong vibration 12 is low.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10360248A DE10360248A1 (en) | 2003-12-20 | 2003-12-20 | Insert tool for an angle grinder |
PCT/EP2004/052876 WO2005061180A1 (en) | 2003-12-20 | 2004-11-09 | Insertion tool for an angle grinder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1697086A1 true EP1697086A1 (en) | 2006-09-06 |
EP1697086B1 EP1697086B1 (en) | 2008-07-02 |
Family
ID=34706393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04820605A Expired - Fee Related EP1697086B1 (en) | 2003-12-20 | 2004-11-09 | Insertion tool for an angle grinder |
Country Status (5)
Country | Link |
---|---|
US (1) | US7722445B2 (en) |
EP (1) | EP1697086B1 (en) |
CN (1) | CN100540222C (en) |
DE (2) | DE10360248A1 (en) |
WO (1) | WO2005061180A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10360252A1 (en) * | 2003-12-20 | 2005-07-21 | Robert Bosch Gmbh | tool adapter |
US8430725B2 (en) * | 2008-12-19 | 2013-04-30 | Jovan Pajovic | Abrasive disc construction |
US8192255B2 (en) * | 2010-02-11 | 2012-06-05 | Eric Gallup | Tool holder with tapered slot for a grinding machine |
CN102814792B (en) * | 2011-06-09 | 2014-12-17 | 苏州宝时得电动工具有限公司 | Power tool, work head and adapter applied to same |
US20190270178A1 (en) | 2018-03-04 | 2019-09-05 | Osborn GmbH | Rotary Surface Finishing Implement with Tool Mounting Adapter |
CN111660193B (en) * | 2020-06-08 | 2021-08-10 | 苏州高之仙自动化科技有限公司 | Polishing head assembly and stone polishing robot |
CN111546159B (en) * | 2020-06-08 | 2021-06-25 | 上海高仙自动化科技发展有限公司 | Polishing head assembly and stone polishing robot |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3295262A (en) * | 1964-06-17 | 1967-01-03 | Gen Pneumatic Products Corp | Pneumatic motor mechanism for hand tools |
US5346453A (en) * | 1993-08-12 | 1994-09-13 | Rivera Bottzeck Otto | Multiple bit power drill |
US5406752A (en) * | 1993-09-13 | 1995-04-18 | American Pneumatic Technologies | Reversible sander |
US6093090A (en) * | 1998-01-28 | 2000-07-25 | The Stanley Works | Reversible clamping hub |
DE29900612U1 (en) * | 1999-01-15 | 1999-03-18 | Chung Lee Hsin Chih | Delay device for a grinding machine |
US6309288B1 (en) * | 2000-02-22 | 2001-10-30 | Chung Lee Hsin-Chih | Retarding mechanism for a grinding machine |
DE10017458A1 (en) * | 2000-04-07 | 2001-10-18 | Bosch Gmbh Robert | Tool holder for a grinding machine has insert tool actively connected to drive shaft through follower device with positive engagement through spring-tensioned detent element |
DE10017981A1 (en) * | 2000-04-11 | 2001-10-25 | Bosch Gmbh Robert | Tool holder |
DE10131326A1 (en) | 2001-06-28 | 2003-01-16 | Bosch Gmbh Robert | Tool for grinding machines |
DE10136459A1 (en) | 2001-07-26 | 2003-02-13 | Bosch Gmbh Robert | System with implement holder, especially grinding disc has detent movably mounted against spring force, with hub ad axial protuberance |
DE10218196B4 (en) * | 2002-04-24 | 2017-06-29 | Robert Bosch Gmbh | Insert tool and quick-release system with a rotating drivable, hub-shaped hub |
DE10222292A1 (en) | 2002-05-18 | 2003-12-04 | Bosch Gmbh Robert | System with a tool holder |
DE10225583A1 (en) | 2002-06-10 | 2004-01-08 | Robert Bosch Gmbh | Tool holder and insert tool |
TWM255104U (en) * | 2003-02-05 | 2005-01-11 | Applied Materials Inc | Retaining ring with flange for chemical mechanical polishing |
US6813837B1 (en) * | 2003-06-02 | 2004-11-09 | Lung-Hui Chen | Bi-directional rotation pneumatic cutting machine |
US6984169B2 (en) * | 2003-06-04 | 2006-01-10 | Lung-Hui Chen | Bi-directional rotation pneumatic grinding tool |
US6905401B1 (en) * | 2004-05-07 | 2005-06-14 | Sunmatch Industrial Co., Ltd. | Bi-directional rotation pneumatic grinding tool |
US7029385B1 (en) * | 2005-07-27 | 2006-04-18 | Fu-Chun Wang | Two-way rotary multi-function polisher |
-
2003
- 2003-12-20 DE DE10360248A patent/DE10360248A1/en not_active Ceased
-
2004
- 2004-11-09 US US10/564,667 patent/US7722445B2/en not_active Expired - Fee Related
- 2004-11-09 WO PCT/EP2004/052876 patent/WO2005061180A1/en active IP Right Grant
- 2004-11-09 DE DE502004007518T patent/DE502004007518D1/en active Active
- 2004-11-09 CN CNB2004800380734A patent/CN100540222C/en not_active Expired - Fee Related
- 2004-11-09 EP EP04820605A patent/EP1697086B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2005061180A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1898063A (en) | 2007-01-17 |
US7722445B2 (en) | 2010-05-25 |
DE10360248A1 (en) | 2005-07-28 |
US20070060029A1 (en) | 2007-03-15 |
EP1697086B1 (en) | 2008-07-02 |
CN100540222C (en) | 2009-09-16 |
DE502004007518D1 (en) | 2008-08-14 |
WO2005061180A1 (en) | 2005-07-07 |
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