EP1559509A1 - Dispositif de fixation d'un outil de meulage à une machine-outil - Google Patents

Dispositif de fixation d'un outil de meulage à une machine-outil Download PDF

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Publication number
EP1559509A1
EP1559509A1 EP04027659A EP04027659A EP1559509A1 EP 1559509 A1 EP1559509 A1 EP 1559509A1 EP 04027659 A EP04027659 A EP 04027659A EP 04027659 A EP04027659 A EP 04027659A EP 1559509 A1 EP1559509 A1 EP 1559509A1
Authority
EP
European Patent Office
Prior art keywords
tool
threaded
machine
side fastening
spring
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
Application number
EP04027659A
Other languages
German (de)
English (en)
Other versions
EP1559509B1 (fr
Inventor
Christian Dipl.-Ing. Kneip (FH)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festool GmbH
Original Assignee
Festool GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Festool GmbH filed Critical Festool GmbH
Publication of EP1559509A1 publication Critical patent/EP1559509A1/fr
Application granted granted Critical
Publication of EP1559509B1 publication Critical patent/EP1559509B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/16—Bushings; Mountings
    • 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
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/20—Mountings for the wheels
    • 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 relates to a device for releasably connecting a plate or disc-shaped grinding tool with one during operation the tool to a rotating movement driving machine tool, with a tool-side fastening device and a machine-side fastening device, each having a threaded portion and screwed together over their thread parts, where one of the thread parts is an external thread and the other Thread part has an internal thread and the two fastening devices in the bolted together state are supported against each other via support surfaces.
  • Usual sanding discs have a threaded portion with an internal thread on, with it on one end to the output shaft the machine tool arranged external thread be screwed on. This screwing is done by a output shaft side Supporting surface limited, against the one on Sanding pad arranged supporting surface comes to the plant. Then the sanding pad is still against the output shaft side Tightening support surface. This tightening takes place the user often so hard that a later unscrewing the grinding plate is difficult. In addition, that grinding pad during operation due to the between occurring to them and the workpiece to be ground Regularly tighten forces by itself, so that the release of the grinding plate is made even more difficult.
  • the present invention has the object based, a device of the type mentioned above create, with the too strong tightening of the respective Grinding tool is avoided.
  • This object is achieved in that a the thread parts against a spring force in the direction of the support surface of the respective threaded portion having Mounting device away axially movable is and that the tool-side fastening device until to a predetermined by rotary limit stops rotary end position screwed with the machine-side fastening device is.
  • Another advantage is that one in operation possibly torque applied to the grinding tool does not lead to loosening of the grinding tool in the release direction, as long as the spring force is effective.
  • a grinding tool 1 in the form of a Sanding plate for grinding workpieces out, at the bottom of a 2 not in the drawing shown abrasive coating is interchangeable attached.
  • a sanding plate could also be a Act grinding wheel.
  • the grinding tool 1 is provided with a Stripping part 3 of a motor machine tool detachable rotatably connected, so that it is in operation when the machine tool is turned on, performs a rotating movement.
  • the further training of the driven part 3 in detail interested in connection with the present invention not further.
  • the bonding of the grinding tool 1 to the driven part 3 takes place by means of a tool-side fastening device 4 and a machine-side fastening device 5, each having a threaded portion 6 and 7 and over their threaded sections 6, 7 are screwed together.
  • a the thread parts, expediently the tool-side threaded portion 6, has an internal thread 8. Accordingly forms the other thread part, expediently the machine side Thread part 7, one with the internal thread 8 cooperating external thread 9.
  • the tool-side fastening device 4 with the internal thread 8 carrying thread part 6 is an integral part of the grinding tool 1, that in the embodiment from a tool-side fastening device 4 having tool top 10 made of hard plastic is, on the underside of a softer foam body 11th is attached to the bottom of the abrasive coating is attached.
  • the machine-side fastening device 5 is how is still described, made up of several items and will firmly connected to the output part 3, so that they on the Machine tool remains. It is understood that they, for example also be taken away for repair purposes can.
  • One of the two fastening devices expediently the machine-side fastening device 5, contains a Spring device 16 expediently in the form of a plate spring 17.
  • the arrangement is such that the Machine-side thread pitch 7 against the spring force of Spring device 16 in the direction of the machine-side support surface 13 is mounted axially movable away. hereby is achieved that when screwing the grinding tool 1, if its support surface 12 for engagement with the machine side Support surface 13 has arrived, the grinding tool 1 still can be further rotated in the sense of screwing, where the machine-side threaded portion 7 against the spring force further into the tool-side internal thread 8 so to speak is involved.
  • the tightening torque with which the Grinding tool 1 on the machine-side threaded portion 7 and the machine-side support surface 13 is tightened, is thus determined by the force of the spring means 16.
  • the tool side Fastening device 4 and the machine side Fastening device 5 each have at least one rotary end stop 18 or 19, which determine the rotary end position, to which the grinding tool 1 can be rotated.
  • this Drehendlage comes the at least one turn-stop 18 of the grinding tool 1 in the circumferential direction to the plant the at least one rotary end stop 19 of the machine side Fastening device 5.
  • the tightening is not practically abrupt as in usual case of a rigid arrangement of the machine side Thread part relative to the associated support surface but over a longer turning distance against the spring force, until the final rotational position is reached.
  • the two thread sections 6, 7 are due to space in axial Direction as short as possible. Especially in context hereby it is advantageous that the two threaded parts 6, 7 each a multi-start thread with at least two angularly offset threads exhibit.
  • the expedient embodiment has both the tool-side internal thread 8 and the machine side External thread 9 three such internal threads 20 and external threads 21 on.
  • the external threads 21 are relatively short in the circumferential direction and arranged one behind the other without overlapping. there is between the outer threads 21 a distance provided so that in Figure 2 at the machine side Gewindepartie 7 only one of the three external threads 21st is visible.
  • the machine-side Gewindepartie 7 is of a threaded part 22 formed in the axial direction already mentioned Base element 15 is adjacent. This is the Base element 15 at the attached with grinding tool 1 this opposite side of the threaded part 22.
  • the base element 15 and the threaded portion 22 are separate from each other Parts.
  • the base element 15 stands in radial direction, expediently circumferential, over the threaded part 22 before and has at the above area the Support surface 13 on.
  • the spring force generating spring device described 16 engages of the base element 15 opposite side forth on the threaded portion 22 at.
  • the threaded portion 22 has a can-like Shape with a the base member 15 facing Floor 23, from which the threaded portion 7 protrudes.
  • the spring device 16, i. the plate spring 17, is in the of the Threaded part 7 enclosed space of the threaded portion 22 used and cooperates with the threaded part bottom 23.
  • the base member 15 and the threaded portion 22 are mounted in the State non-rotatable and in the axial direction relative to each other movably connected. These are the basic element 15 and the threaded portion 22 rotatably inserted into each other.
  • the threaded part 22 distributed over the circumference arranged pocket-like recesses 24 is provided, which are open to the base member 15.
  • These pocket-like recesses 24 are each a plug-in projection 25 assigned to the base member 15.
  • the in the bag-like Recesses 24 inserted plug-in projections 25th make a non-rotatable, but axially movable connection ago.
  • the spring means 16, the threaded part 22 and the base part 15 are in this order of a locking screw 26 penetrated, with the machine-side fastening device 5 is fixed to the driven part 3. It will the locking screw 26 with its protruding from the base part 15 Scope screwed into the driven part 3.
  • a spacer box 27 is present, which is aligned arranged mutually AxialausEnglishept 28, 29 of the threaded part 22 and the spring means 16 passes through and on the Base element 15 is supported.
  • the spacer bushing 27 secures further the spring device 16 in the axial direction. The latter takes place by means of a radially projecting annular collar 30 of the spacer bushing 27, the spring means 16 to the axial recess 29 engages around.
  • the locking screw 26 passes through the axial recesses 28, 29 of the threaded part 22 and the spring device 16 so to speak lining Spacer bushing 27 and an axial bore 31 of the base member 15.
  • the locking screw 16 has at its the spacer sleeve 27 facing end a radially projecting screw head 32, which - directly or via an intermediate element - against the spacer bush 27 acts, so that in the stripping section. 3 screwed locking screw 26, the spacer sleeve 27th clamped between the screw head 32 and the base member 15 is. In this way, the spring device 16 remain and the threaded portion 22 unaffected by how strong the Locking screw 26 is tightened.
  • the screw head 32 has a hexagon socket for a turning tool on.
  • the spacer bushing 27 has at its radially outward projecting annular collar 30 opposite end one after radially inwardly directed annular shoulder 33 on which the in the interior of the spacer bushing 27 dipping screw head 32nd attacks.
  • the annular shoulder 33 encloses a passage opening 34 for the passage of the locking screw 26th
  • the base member 15 has at least in its radial Direction on the machine-side thread part 7 above Area a plate-like shape.
  • the machine-side rotary end stops 19 are on the base element 15 arranged. It is expediently provided that the rotary end stops 19 on the circumference of the base element 15 protrude radially outward.
  • the rotary end stops 18 of the tool-side fastening device 4 may each be facing from the circumferentially End face 35 of a strip-like Anformung 36 formed which are radially outside of the tool-side support surface 12 is arranged and extends in the circumferential direction.
  • the mounted with abrasive tool 1 the base part 15 of the machine-side fastening device 5 facing Top 37 of the strip-like projections 36 extends the Slope of the internal thread 8 is inclined accordingly, so that the strip-shaped projections 36 screwing the Do not hinder grinding tool 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP20040027659 2004-01-10 2004-11-22 Dispositif de fixation d'un outil de meulage à une machine-outil Active EP1559509B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004001580 2004-01-10
DE200410001580 DE102004001580B3 (de) 2004-01-10 2004-01-10 Vorrichtung zum Verbinden eines Schleifwerkzeugs mit einer Werkzeugmaschine

Publications (2)

Publication Number Publication Date
EP1559509A1 true EP1559509A1 (fr) 2005-08-03
EP1559509B1 EP1559509B1 (fr) 2007-01-10

Family

ID=34609522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040027659 Active EP1559509B1 (fr) 2004-01-10 2004-11-22 Dispositif de fixation d'un outil de meulage à une machine-outil

Country Status (2)

Country Link
EP (1) EP1559509B1 (fr)
DE (2) DE102004001580B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1795301A1 (fr) * 2005-12-12 2007-06-13 Festool GmbH Ponceuse à disque et disque de ponçage avec dispositif de fermeture et de blocage rapide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013009129B4 (de) * 2013-05-31 2020-10-01 Prime Supply Inc. Verbesserte abrasive Vorrichtung
DE102023104054A1 (de) 2023-02-17 2024-08-22 Thomas Grüneberg Polierwerkzeug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542693A1 (fr) * 1991-10-29 1993-05-19 TAF S.r.l. Disque abrasif pour meuleuses munie de moyens de serrage améliorés

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537935A1 (de) * 1985-09-20 1987-04-30 Fabritius Hans Josef Verbesserte staubabsaugvorrichtung fuer schleifgeraete mit einem rotierenden schleifteller
DE10056211A1 (de) * 2000-11-13 2002-05-23 Neudecker & Jolitz Gmbh & Co Schnellspannmutter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542693A1 (fr) * 1991-10-29 1993-05-19 TAF S.r.l. Disque abrasif pour meuleuses munie de moyens de serrage améliorés

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1795301A1 (fr) * 2005-12-12 2007-06-13 Festool GmbH Ponceuse à disque et disque de ponçage avec dispositif de fermeture et de blocage rapide
EP2052813A1 (fr) 2005-12-12 2009-04-29 Festool GmbH Polisseuse et plateau de meule pour une polisseuse

Also Published As

Publication number Publication date
DE102004001580B3 (de) 2005-06-23
EP1559509B1 (fr) 2007-01-10
DE502004002616D1 (de) 2007-02-22

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