EP1559509B1 - 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
EP1559509B1
EP1559509B1 EP20040027659 EP04027659A EP1559509B1 EP 1559509 B1 EP1559509 B1 EP 1559509B1 EP 20040027659 EP20040027659 EP 20040027659 EP 04027659 A EP04027659 A EP 04027659A EP 1559509 B1 EP1559509 B1 EP 1559509B1
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EP
European Patent Office
Prior art keywords
tool
machine
threaded
threaded section
base element
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.)
Active
Application number
EP20040027659
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German (de)
English (en)
Other versions
EP1559509A1 (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
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Festool GmbH
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Filing date
Publication date
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Publication of EP1559509A1 publication Critical patent/EP1559509A1/fr
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Publication of EP1559509B1 publication Critical patent/EP1559509B1/fr
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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-shaped or disk-shaped grinding tool with a machine tool driving the tool during operation to a rotating movement, with a tool-side fastening device and a machine-side fastening device, each having a threaded portion and are bolted together through their threaded portions, wherein one of the thread parts has an external thread and the other thread part has an internal thread, and the two fastening devices in the state screwed together are supported against one another via support surfaces.
  • the present invention seeks to provide a device of the type mentioned, with an excessive tightening of the respective grinding tool is avoided.
  • This object is achieved in that one of the thread parts against a spring force of a spring device in the direction of the support surface of the threaded portion having fastening device is mounted axially movable away and that the tool-side fastening device to a predetermined by rotary limit stops rotary end position with the Machine-side fastening device can be screwed.
  • a further advantage is that a torque possibly exerted on the grinding tool during operation in the release direction does not lead to loosening of the grinding tool, as long as the spring force is effective.
  • a grinding tool 1 in the form of a grinding plate for the abrasive machining of workpieces is apparent, on the underside 2 a not in the drawing shown abrasive coating is interchangeable attached. Instead of a sanding plate, it could also be a grinding wheel.
  • the grinding tool 1 is releasably rotatably connected to a driven part 3 of a motor machine tool, so that it performs a rotating movement during operation, when the machine tool is turned on.
  • the further development of the driven part 3 in detail is of no further interest in connection with the present invention.
  • 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 are screwed together via their threaded sections 6, 7.
  • One of the threaded sections expediently the tool-side threaded portion 6, has an internal thread 8.
  • the other threaded portion expediently the machine-side threaded portion 7, forms an external thread 9 cooperating with the internal thread 8.
  • the arrangement could also be reversed so that the tool-side fastening device is provided with an external thread and the machine-side fastening device with an internal thread.
  • the tool-side fastening device 4 with the internal thread 8 bearing threaded portion 6 is an integral part of the grinding tool 1, which formed in the embodiment of a tool-side fastening device 4 having tool upper part 10 made of hard plastic is at the bottom of a softer foam body 11 is attached to the bottom of the abrasive coating is attached.
  • the machine-side fastening device 5 consists, as will be described, of several individual parts and is firmly connected to the driven part 3, so that it remains on the machine tool. It is understood that it can also be taken away for repair purposes, for example.
  • a support surface 12 of the tool-side fastening device 4 comes into contact with a support surface 13 of the machine-side fastening device 5, so that the grinding tool 1 extends over the support surfaces 12, 13 supported on the machine side.
  • Both support surfaces 12, 13 have an annular shape and are arranged coaxially to the axis of rotation 14 of the driven part 3 and thus also of the grinding tool 1.
  • the tool-side support surface 12 is formed by the end face of the tool-side threaded portion 6 and the machine-side support surface 13 from the underside of a base member 15 of the machine-side fastening device 5.
  • the base element 15 protrudes in the radial direction beyond the threaded portion 7 of the machine-side fastening device 5. At this projecting area, the machine-side support surface 13 is arranged.
  • 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 threaded portion 7 is mounted against the spring force of the spring device 16 in the direction of the machine-side support surface 13 away axially movable. This ensures that when screwing the grinding tool 1, when its support surface 12 has come to rest against the machine-side support surface 13, the grinding tool 1 can be further rotated in the sense of unscrewing, the machine-side threaded portion 7 against the spring force further into the tool side Internal thread 8 is pulled in, so to speak.
  • the tightening torque with which the grinding tool 1 is tightened on the machine-side threaded portion 7 and the machine-side support surface 13 is thus determined by the force of the spring device 16.
  • the tool-side fastening device 4 and the machine-side fastening device 5 each have at least one rotary end stop 18 and 19, which determine the rotary end position, to which the grinding tool 1 can be rotated. In this rotary end position, the at least one rotary end stop 18 of the grinding tool 1 comes to rest in the circumferential direction against the at least one rotary end stop 19 of the machine-side fastening device 5.
  • the tightening is not practically abrupt as in the usual case of a rigid arrangement of the machine-side threaded portion relative to the associated support surface but over a longer rotational path away against the spring force until the final rotational position is reached.
  • the two thread sections 6, 7 are formed as short as possible in the axial direction for reasons of space.
  • the two threaded sections 6, 7 each have a multi-start thread with at least two angularly offset to each other arranged threads.
  • both the tool-side internal thread 8 and the machine-side external thread 9 have three such internal threads 20 and external threads 21.
  • the external threads 21 are relatively short in the circumferential direction and arranged one behind the other without overlapping. In this case, a distance is provided between the individual external threads 21, so that only one of the three external threads 21 is visible in FIG. 2 in the case of the machine-side thread part 7.
  • the angle of rotation, over which the two threaded sections 6, 7 are in threaded engagement with one another, should be less than 120 ° because of the three rotary end stop pairs 18, 19. If only such a rotary end stop pair were present, the maximum angle of rotation would have to be less than 360 °.
  • the machine-side Gewindepartie 7 is formed by a threaded portion 22 which is adjacent to the aforementioned base member 15 in the axial direction.
  • the base member 15 is located at the attached with abrasive tool 1 this opposite side of the threaded portion 22.
  • the base member 15 and the threaded portion 22 are separate parts.
  • the base element 15 protrudes in the radial direction, expediently circumferentially, over the threaded part 22 and has the supporting surface 13 on the projecting area.
  • the described spring force generating spring device 16 engages from the base member 15 opposite side of the threaded portion 22 at.
  • the threaded portion 22 has a can-like shape with a base element 15 facing the bottom 23, from which projects the threaded portion 7.
  • the spring means 16, i. the plate spring 17 is inserted into the space enclosed by the threaded portion 7 of the threaded portion 22 and cooperates with the threaded portion bottom 23.
  • the base member 15 and the threaded portion 22 are non-rotatable in the assembled state and in the axial direction relative to each other movably connected to each other.
  • the base member 15 and the threaded portion 22 rotatably inserted into each other.
  • pocket-like recesses 24 are provided which are open to the base member 15.
  • These pocket-like recesses 24 are each assigned a plug projection 25 on the base element 15. The inserted into the pocket-like recesses 24 plug-in projections 25th make a non-rotatable, but axially movable connection.
  • the spring device 16, the threaded part 22 and the base part 15 are penetrated in this order by a locking screw 26, with which the machine-side fastening device 5 is fixed to the driven part 3.
  • the locking screw 26 is screwed with its protruding from the base portion 15 projecting portion in the driven part 3.
  • the maximum tightening torque of the grinding tool 1 is independent of how tight the locking screw 26 is tightened, a spacer bushing 27 is provided, the aligned axial recesses 28, 29 of the threaded portion 22 and the spring means 16 passes through and is supported on the base member 15.
  • the spacer bushing 27 also secures the spring device 16 in the axial direction. The latter is done by means of a radially projecting annular collar 30 of the spacer bushing 27, which engages around the spring means 16 about the axial recess 29 around.
  • the locking screw 26 extends through the AxialausEnglish Institute 28, 29 of the threaded portion 22 and the spring means 16, so to speak, lining bushing 27 and an axial bore 31 of the base member 15.
  • the locking screw 16 has at its the spacer bush 27 facing the end of a radially projecting screw head 32, the - Acts directly or via an intermediate element - against the spacer bushing 27, so that when tightened in the stripping section 3 locking screw 26, the spacer bushing 27 is clamped between the screw head 32 and the base member 15. In this way, the spring means 16 and the threaded portion 22 remain unaffected by how much the locking screw 26 is tightened.
  • the screw head 32 has a hexagon socket for a turning tool.
  • the spacer bushing 27 has at its radially outwardly projecting annular collar 30 opposite end on a radially inwardly directed annular shoulder 33 on which engages the dipping into the interior of the spacer bushing screw head 32 32.
  • the annular shoulder 33 encloses a passage opening 34 for the passage of the locking screw 26th
  • the base element 15 has a plate-like shape at least in its region projecting in the radial direction beyond the machine-side threaded portion 7.
  • the machine-side rotary end stops 19 are arranged on the base element 15. It is expediently provided that the rotary end stops 19 protrude radially outward on the circumference of the base element 15.
  • the rotary end stops 18 of the tool-side fastening device 4 can each be formed by the circumferentially facing end face 35 of a strip-like projection 36, which is arranged radially outside the tool-side support surface 12 and extends in the circumferential direction.
  • the mounted on the grinding tool 1 the base part 15 of the machine-side fastening means 5 facing top 37 of the strip-like projections 36 of the slope of the internal thread 8 correspondingly inclined, so that the strip-shaped projections 36 do not hinder the screwing of the grinding tool 1.

Claims (18)

  1. Dispositif de montage amovible d'un outil de meulage en forme de plateau ou de disque sur une machine-outil entraînant l'outil dans un mouvement de rotation en cours de service, comportant un dispositif de fixation (4) du côté outil et un dispositif de fixation (5) du côté machine, qui comportent chacun une partie filetée (6, 7) et qui sont vissés l'un à l'autre par l'intermédiaire de leurs parties filetées, l'une des parties filetées ayant un filetage extérieur (9) et l'autre partie un filetage intérieur (8) et les deux dispositifs de fixation, à l'état vissé l'un à l'autre, étant en appui l'un contre l'autre par l'intermédiaire de surfaces d'appui (12, 13), caractérisé en ce que l'une (7) des parties filetées est montée mobile dans le sens axial à l'encontre de la force d'un dispositif à ressort (16) en s'écartant de la surface d'appui (13) du dispositif de fixation (5) muni de la partie filetée (7) concernée, et en ce que le dispositif de fixation (4) du côté outil peut être vissé jusqu'à une position de fin de rotation, prédéfinie par des butées d'arrêt de rotation (18, 19), sur le dispositif de fixation (5) du côté machine.
  2. Dispositif selon la revendication 1, caractérisé en ce que les deux parties filetées (6, 7) sont en prise l'une avec l'autre sur un angle de rotation maximum inférieur à 360°.
  3. Dispositif selon la revendication 2, caractérisé en ce que les parties filetées (6, 7) comportent chacune un filetage (8, 9) à filets multiples avec au moins deux pas de vis (20, 21) disposés l'un par rapport à l'autre avec un décalage angulaire.
  4. Dispositif selon la revendication 3, caractérisé en ce que les parties filetées (6, 7) comportent chacune un filetage (8, 9) à trois pas de vis.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la partie filetée (7), montée mobile dans le sens opposé à la force d'un ressort, est placée sur le dispositif de fixation (5) du côté machine.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le filetage extérieur (9) est réalisé sur la partie filetée (7) du dispositif de fixation (5) du côté machine et le filetage intérieur (8) est réalisé sur la partie filetée (6) du dispositif de fixation (4) du côté outil.
  7. Dispositif selon la revendication 6, caractérisé en ce que le dispositif de fixation (5) du côté machine comporte un élément fileté (22), qui forme sa partie filetée (7) et qui, dans le sens axial, est situé à proximité d'un élément de base (15), qui est séparé de l'élément fileté (22) et qui s'avance en saillie dans le sens radial au-delà de la partie filetée (7) et forme la surface d'appui (13) du côté machine, le dispositif à ressort (16), qui génère la force de ressort, entrant en contact avec l'élément fileté (22) depuis le côté opposé à l'élément de base (1 5).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que le dispositif à ressort (16) est formé par une rondelle-ressort (17).
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que l'élément de base (15) et l'élément fileté (22) sont enfichés l'un dans l'autre de manière solidaire en rotation.
  10. Dispositif selon l'une des revendications 7 à 9, caractérisé en ce que l'élément fileté (22) présente une configuration avec un fond (23), qui est orienté vers l'élément de base (15) et à partir duquel la partie filetée (7) fait saillie.
  11. Dispositif selon la revendication 10, caractérisé en ce que le dispositif à ressort (16) coopère avec le fond (23) de l'élément fileté (22).
  12. Dispositif selon l'une des revendications 7 à 11, caractérisé en ce que le dispositif à ressort (16), l'élément fileté (22) et l'élément de base (15) sont traversés dans cet ordre de succession par une vis d'immobilisation (26) fixant le dispositif de fixation (5) du côté machine sur un élément d'entraînement (3) de la machine-outil.
  13. Dispositif selon la revendication 12, caractérisé en ce que l'élément fileté (22) et le dispositif à ressort (16) comportent des évidements axiaux (28, 29) alignés entre eux, à travers lesquels s'engage une douille d'écartement (27) qui, d'un côté, vient en appui dans le sens axial sur l'élément de base (15) et, de l'autre côté, bloque le dispositif à ressort (16) dans le sens axial, ladite douille et une forure axiale (31) de l'élément de base (15) étant traversées par la vis d'immobilisation (26) qui agit contre la douille d'écartement (27) par sa tête de vis (32) en saillie dans le sens radial ou un élément intermédiaire.
  14. Dispositif selon l'une des revendications 7 à 13, caractérisé en ce qu'au moins la partie de l'élément de base (15), en saillie dans le sens radial sur la partie filetée (7), présente une configuration en forme de plaquette.
  15. Dispositif selon l'une des revendications 7 à 14, caractérisé en ce que l'élément de base (15) forme au moins une butée de fin de rotation (19), qui coopère avec une butée de fin de rotation (18) sur le dispositif de fixation (4) du côté outil.
  16. Dispositif selon la revendication 15, caractérisé en ce que ladite au moins une butée de fin de rotation (19) de l'élément de base (15) est en saillie dans le sens radial vers l'extérieur sur la périphérie de l'élément de base (15).
  17. Dispositif selon l'une des revendications 6 à 16, caractérisé en ce que le dispositif de fixation (4) du côté outil comporte au moins une butée de fin de rotation (18), qui coopère avec une butée de fin de rotation (19) sur le dispositif de fixation (5) du côté machine.
  18. Dispositif selon la revendication 17, caractérisé en ce que ladite au moins une butée de fin de rotation (18) du dispositif de fixation (4) du côté outil est formée par la face frontale (35), dirigée dans le sens périphérique, d'un élément dépassant (36) en forme de rebord, qui est disposé dans le sens radial en dehors de la face d'appui (12) du côté outil et s'étend dans le sens périphérique et dont la face supérieure (37) est inclinée en correspondance avec le pas de vis du filetage intérieur (8).
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 EP1559509A1 (fr) 2005-08-03
EP1559509B1 true EP1559509B1 (fr) 2007-01-10

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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

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005060514A1 (de) * 2005-12-12 2007-06-14 Festool Gmbh Tellerschleifer sowie Schleifteller für einen Tellerschleifer
DE102013009129B4 (de) * 2013-05-31 2020-10-01 Prime Supply Inc. Verbesserte abrasive Vorrichtung

Family Cites Families (3)

* 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
IT221984Z2 (it) * 1991-10-29 1994-12-29 Taf Srl Disco abrasivo per macchine smerigliatrici, con mezzi di aggancio perfezionati
DE10056211A1 (de) * 2000-11-13 2002-05-23 Neudecker & Jolitz Gmbh & Co Schnellspannmutter

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DE502004002616D1 (de) 2007-02-22
DE102004001580B3 (de) 2005-06-23
EP1559509A1 (fr) 2005-08-03

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