EP0381557B1 - Ensemble de disposition pour la réunion rapide et temporaire d'une pièce destinée à être entraînée en rotation à un support, en particulier pour disques abrasifs - Google Patents

Ensemble de disposition pour la réunion rapide et temporaire d'une pièce destinée à être entraînée en rotation à un support, en particulier pour disques abrasifs Download PDF

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Publication number
EP0381557B1
EP0381557B1 EP19900400209 EP90400209A EP0381557B1 EP 0381557 B1 EP0381557 B1 EP 0381557B1 EP 19900400209 EP19900400209 EP 19900400209 EP 90400209 A EP90400209 A EP 90400209A EP 0381557 B1 EP0381557 B1 EP 0381557B1
Authority
EP
European Patent Office
Prior art keywords
support
oblong opening
cavity
receiving member
arrangements according
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.)
Expired - Lifetime
Application number
EP19900400209
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0381557A1 (fr
Inventor
Thierry Grasser
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0381557A1 publication Critical patent/EP0381557A1/fr
Application granted granted Critical
Publication of EP0381557B1 publication Critical patent/EP0381557B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material
    • B24D9/085—Devices for mounting sheets on a backing plate

Definitions

  • the present invention relates to a set of arrangements for the rapid and temporary joining of a part, intended to be driven in rotation, to a support capable of providing said drive.
  • the part intended to be driven in rotation can be an abrasive disc and the support capable of providing the drive can be joined operatively to motor means.
  • abrasive discs are disposable elements which wear out fairly quickly so, on the one hand, that they must be as low as possible cost price, and, on the other hand, that their replacement must be able be performed instantly and without the need for a tool.
  • the means used for the union between the abrasive disc and its drive support must however guarantee that the disc is effectively rotated and therefore be able to withstand the friction forces which develop.
  • the interconnection means consist of a metal piece in the shape of a large-edge bowl which is glued, along this wide edge, to the reverse side of the abrasive disc and the bottom of which is pierced. an access opening adapted to receive a male member dependent on the drive support.
  • the bottom wall of the bowl and its side wall define around said access opening a decreasing size path which the male element follows, with a self-locking effect.
  • the reverse side of the disc is provided with a plastic part having a series of projections in the form of blades arranged in a circle and which snap into recesses of corresponding profile provided in a metal part included in the drive support.
  • This embodiment gives fairly satisfactory results but its execution requires the use of an assembly in several parts and machining and molding of delicate shapes.
  • the male interconnection means consists of a T-piece whose vertical bar is co-axial with the axis of rotation of the abrasive disc and its drive support and the crossbar of which is oriented towards the female interconnection means, the female means comprising a buttonhole of a geometry allowing the crossing of said buttonhole by the crossbar of the T.
  • part of the male interconnection means protrudes at the center of the outer surface of the abrasive disc, a part which may accidentally come into contact with the surface being treated, with the corresponding risks of damage.
  • the object of the present invention is to remedy this drawback by providing a set of extremely simple and reliable arrangements, comprising no protruding part on the surface of the part to be driven in rotation.
  • the buttonhole is made in a hollow receiving member in the cavity of which opens said buttonhole, said cavity being at least in cylinder portions and the thickness of the wall in which the buttonhole is made from a height substantially lower than the height of the vertical bar of the T at the radial wall of the cavity coinciding with said buttonhole, up to a thickness substantially greater than the height of said bar, in the direction of a radial wall of the cavity forming a stop.
  • the cavity is substantially shaped double quarter cylinder, said quarter cylinders being symmetrical with respect to two perpendicular planes intersecting along the axis of rotation of the disc and its support and having, on either side, one of these planes, an intersection zone opening towards the outside of the receiving member and corresponding to said buttonhole. It is understood that, in this case, it is the radial wall of the quarter cylinder opposite the radial wall coincide with the buttonhole which forms a stop for rotation.
  • the thickness of the wall in which the buttonhole is made goes from a height substantially less than the height of the vertical bar of the T at the level of the radial wall of the cavity coinciding with said buttonhole, up to a thickness substantially greater than the height of said bar, in the direction of the radial wall of the cavity forming a stop.
  • the T-piece constitutes the end of the axis of drive in rotation of the support and the receiving member is provided on the substantially flat face of the disc to be driven in rotation.
  • an elastomer support is overmolded on the drive axis, which elastomer support offers the substantially flat surface intended to come to bear against that of the disc to be driven in rotation.
  • the elastomer support provides an annular space around the T-piece and the receiving member is a plastic element bonded to the substantially flat reverse side of the disc intended to be rotated, said element being adapted to be housed in said annular space when the two flat surfaces are in abutment against one another.
  • the device according to the invention comprises a drive support 1 composed of a rod 2a adapted to be immobilized in the jaw of a power tool, rod which is extended by a support block 2b then by an inverted T-piece 3.
  • the vertical bar of the T is designated by 4 and its horizontal bar by 5.
  • a corolla 6 of elastomeric material is overmolded on the support block 2b by determining a surface substantially flat support 6a and providing an annular space around the T-piece 7.
  • FIG. 2 we see an abrasive disc 8 whose reverse side is designated by the reference 8a and on which is stuck a receiving member 9 in the form of a wide-edge bowl 10. This wide edge 10 forms a flange and the bottom of the bowl is pierced with a buttonhole 11 whose geometry generally corresponds to that of the crossbar 5.
  • the internal volume of the bowl is in fact defined by two quarter-cylinder cavities 12 (A, B, C) and 13 (D, E, F)) which are symmetrical with respect to the planes XX 'and Y-Y', which planes intersect along the axis of rotation ZZ 'of the tool.
  • the two quarter-cylinders A, B, C and D, E, F intersect and their intersection zone is perpendicular to the buttonhole 11. It is understood that this structure allows the transverse bar 5 to penetrate into the buttonhole 11 and make it make a quarter turn to make it penetrate into the cavities 12 and 13.
  • the thickness of the wall 18 in which the buttonhole 11 is made is of variable importance. More precisely, at the level of the radial walls 19 (A, B) and 20 (E, D) of the quarter-cylinder cavities 12 and 13, the thickness of the wall 18 is substantially less than that of the vertical bar 4 of the T -which allows access to the horizontal bar 5 in said cavities 12 and 13- and this thickness increases until it is greater than the height of the bar 4. Slopes 14 and 15 are thus formed which promote blocking progressive of the male member 3 in these cavities, while it rotates there according to the arrows, the funds 16 and 17 of the cavity forming a blocking stop.
  • the means according to the invention are of an extremely simple structure and that the connection between the abrasive disc and its support is made by simple penetration of the transverse bar 5 in the buttonhole 11 and rotation of a quarter turn. Disconnection takes place in the reverse movement.
  • connection mode is applicable to other tools.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP19900400209 1989-01-26 1990-01-24 Ensemble de disposition pour la réunion rapide et temporaire d'une pièce destinée à être entraînée en rotation à un support, en particulier pour disques abrasifs Expired - Lifetime EP0381557B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900939 1989-01-26
FR8900939A FR2641999A1 (fr) 1989-01-26 1989-01-26 Ensemble de dispositions pour la reunion rapide et temporaire d'une piece, destinee a etre entrainee en rotation, a un support en particulier pour disques abrasifs

Publications (2)

Publication Number Publication Date
EP0381557A1 EP0381557A1 (fr) 1990-08-08
EP0381557B1 true EP0381557B1 (fr) 1993-04-21

Family

ID=9378113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900400209 Expired - Lifetime EP0381557B1 (fr) 1989-01-26 1990-01-24 Ensemble de disposition pour la réunion rapide et temporaire d'une pièce destinée à être entraînée en rotation à un support, en particulier pour disques abrasifs

Country Status (4)

Country Link
EP (1) EP0381557B1 (enrdf_load_stackoverflow)
DE (1) DE69001361T2 (enrdf_load_stackoverflow)
ES (1) ES2040570T3 (enrdf_load_stackoverflow)
FR (1) FR2641999A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998043779A1 (en) * 1997-03-28 1998-10-08 Minnesota Mining And Manufacturing Company A surface treating article and method and system for retaining such article
DE10230308B4 (de) * 2002-07-05 2008-11-06 Robert Bosch Gmbh Einsatzwerkzeug mit einem Stützteller
FR2843553B1 (fr) * 2002-08-14 2005-07-08 Abdelouahab Otmane Ensemble support et element fonctionnel rotatif, et notamment disque abrasif, concu pour etre monte de maniere amovible sur un arbre moteur
EP1713617A1 (fr) * 2004-02-13 2006-10-25 Abdelouahab Otmane Ensemble support et element fonctionnel rotatif, et notamment disque abrasif, concu pour etre monte de maniere amovible sur un arbre moteur
CN101163570B (zh) 2005-11-18 2012-06-27 创科电动工具科技有限公司 用于打磨机的打磨垫锁定件

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1322389A (fr) * 1962-03-15 1963-03-29 Objets de finissage et leurs éléments de support, matières de finissage et leur procédé de fabrication
FR1404924A (fr) * 1964-08-14 1965-07-02 Minnesota Mining & Mfg Dispositif à disque abrasif à changement rapide
US3436875A (en) * 1966-08-05 1969-04-08 Ralph R Cheney Abrasive disc holder
DE3305644A1 (de) * 1983-02-18 1984-08-23 Sven Dr. Wildhaus Jarby Schleif-, polier- und trennwerkzeug

Also Published As

Publication number Publication date
ES2040570T3 (es) 1993-10-16
FR2641999A1 (fr) 1990-07-27
FR2641999B1 (enrdf_load_stackoverflow) 1995-02-03
DE69001361D1 (de) 1993-05-27
EP0381557A1 (fr) 1990-08-08
DE69001361T2 (de) 1993-11-04

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