EP1559525B1 - Outil rotatif - Google Patents

Outil rotatif Download PDF

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Publication number
EP1559525B1
EP1559525B1 EP20050000468 EP05000468A EP1559525B1 EP 1559525 B1 EP1559525 B1 EP 1559525B1 EP 20050000468 EP20050000468 EP 20050000468 EP 05000468 A EP05000468 A EP 05000468A EP 1559525 B1 EP1559525 B1 EP 1559525B1
Authority
EP
European Patent Office
Prior art keywords
holding
hand
drive apparatus
tool
make contact
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
EP20050000468
Other languages
German (de)
English (en)
Other versions
EP1559525A1 (fr
Inventor
Gerd Elfgen
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 EP1559525A1 publication Critical patent/EP1559525A1/fr
Application granted granted Critical
Publication of EP1559525B1 publication Critical patent/EP1559525B1/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
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • 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
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
    • 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
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/10—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes

Definitions

  • the invention relates to a rotatable tool for a hand - held tool drive device, having a disk - shaped basic body, the axis of rotation of which runs perpendicular to a plane spanned by the base body, and which has a central receiving means for torque - locking connection with the tool drive device, with a plurality of Retaining elements which are arranged distributed in the circumferential direction of the base body at this, wherein in each holding element, a work contact element is made of a very hard material and the holding elements are elastically deflected with the work contact elements in a direction parallel to the axis of rotation of the body.
  • Such tools are particularly suitable for coarser grinding or ablation work, for example, for grinding concrete surfaces, derusting metal surfaces and removing old paint and organic lime deposits on underships and the like.
  • the object of the invention is to provide a tool whose working contact elements do not wear on one side and their chisel effect is largely retained.
  • This object is achieved in that the working contact elements are rotatably supported in the holding elements about a respective axis of rotation whose direction has a component perpendicular to the axis of rotation of the body.
  • the working contact element Due to the introduction of an axis of rotation, the working contact element is self-rotating during operation and thus utilizes itself uniformly on a circumferential cutting edge. As a result, the cutting performance of the tool due to the achieved by the rotation self-sharpening over the entire service life is largely retained.
  • the tip area of the work contact elements is given the shape of a cone after a certain period of use.
  • the working contact elements have a working area and a holding area which is thickened relative to the latter, thereby making it possible to adapt the two areas to their working or holding function.
  • each retaining element has a retaining cap, which is frictionally connectable to a retaining base, wherein the retaining cap has an opening through which the working contact element passes to the outside.
  • This cage-like support makes it possible to replace only the work contact elements after their wear, instead of having to replace the tool completely. When used, it is particularly often in the processing of corners and edges to break off individual work contact elements, so that is to be expected with a high factor of cost savings in such an embodiment of the invention.
  • the retaining cap can be screwed to the support base, since such attachment with conventional tools can be produced and thereby eliminating the cost of special tools. If necessary, together with the work contact elements and the retaining caps can be replaced without causing high costs.
  • An embodiment of the invention provides that the retaining cap is plastically deformed in its Verschraubungsend ein of the thread of the support base and thereby a secure and easy connection is achieved even at high peripheral speeds of the tool.
  • the retaining cap is provided with an external hexagon and can be with a simple open-end wrench on the support base or unscrewed from this.
  • the work contact elements can be constructed symmetrically to a plane perpendicular to its axis of rotation. Due to the symmetrical design of the work contact elements After removal of the retaining cap, these can be turned through 180 degrees and reused with the opposite working area.
  • the metallic holding elements extend in the radial direction of the base body into this, provided at its ends facing away from the working contact elements with a thickening and are embedded in the sufficiently elastic plastic material of the base body.
  • Such a connection of the holding elements with the main body is sufficiently stable for high speeds and can be produced in a simple and therefore inexpensive injection molding process.
  • the thickening causes a positive connection between the base body and retaining element and thus a secure fixation.
  • the holding elements can be rotatably mounted about an axis of rotation in the base body, wherein the axis of rotation coincides with the axis of rotation of the working contact element.
  • the retaining element can also be elastically movable in the radial direction.
  • a hammer effect is achieved, which leads to an even more effective material removal.
  • the hammering effect always arises when the holding element impinges on the workpiece and thereby emits the kinetic energy in a pulse-like manner to the latter, in order then to shift back in the course of the further rotation radially to the axis of rotation of the main body.
  • the contact force is reduced in the course of further sweeping the workpiece, whereby the cutting action of the contact elements and thus their wear can be reduced.
  • each retaining element has a helical spring which runs with its longitudinal axis coaxial with the axis of rotation of the working contact elements and on the one hand carries the working contact elements and on the other hand is connected to a rigid base body.
  • the shortenability of the coil springs in their axial direction allows the previously described radial retraction of the working contact elements and the holding elements with increasing radially directed contact force.
  • radially pronounced vibrations are much more cushioned by coil springs than by an elastic body.
  • the holding base of the holding elements can be pressed into the coil springs, whereby a connection is achieved, which under the influence of centrifugal forces due to a consequent reduction in diameter becomes stronger, but which can be easily solved at tool standstill-by turning against the winding sense of the spring.
  • the tool 1 shown in Fig. 1 has a base body 2 with twelve spoke-like arranged on it holding elements 3, which in turn each have a support base 4 and a pencil tip-shaped retaining cap 5.
  • the main body 2 is made of an elastic material, preferably of an elastomer.
  • the holding elements 3, which are also shown in Fig. 2 are inserted into the injection mold and molded with the plastic material, resulting in an intimate and positive connection.
  • the main body 2 has a receiving means A in the form of a passage with a hexagon socket.
  • the retaining element 3 shown in Fig. 2 again shows the support base 4 with a thickening 4 * at one end and an external thread 6 at its holding cap 5 facing the other end, which is also provided with an opening 7 in the form of a bore, the up leads into a thickened central region 8 shown in hexagonal shape in Fig. 1.
  • the retaining cap 5 has at its tapered end an opening 9 in the form of the bore which corresponds in diameter to the opening 7 of the support base 4 and the external thread 6 of the support base 4 against axially shorter, but otherwise corresponding, internal thread 10. Further points the retaining cap 5 is still an inner recess 11, which is greater in its inner diameter than the inner thread 10th
  • a work contact element 12 which consists of a front and a rear cylindrical working area 13 and a central thickened holding portion 14.
  • the rear and the front working area 13 of the work contact element 12 have the same diameter, which is slightly smaller than that of the two holes 7 and 9 of the support base 4 and the retaining cap 5.
  • the largest outer diameter of the holding portion 14 of the work contact element 12 is smaller than the diameter in the area the inner recess 11 of the retaining cap 5.
  • the working contact element 12 is made entirely of hard metal.
  • the hardness of the support base 4 ( ⁇ 60 HRC) is greater than that of the retaining cap 5 ( ⁇ 50 HRC), so that the former with its threads located at the end can form further end threads into the retaining cap 5 made of softer material.
  • an extremely secure screw can be achieved, which also does not solve by lateral blows, as they may arise when working with the tool 1 and thereby cause a release torque.
  • the tool 1 is clamped by means of the receiving means A between two discs, not shown here and can be centered by a centrally mounted on one of the discs axially adjustable hexagon.
  • a shaft attached to one of the discs can then be clamped in a tool driving device, for example in the form of a simple hand drill.
  • the direction of rotation follows the arrow 18 shown in FIG. 1.
  • very good working results can also be achieved in the opposite direction of rotation.
  • the tool 1 shown in FIG. 1 has 12 holding elements 3 distributed uniformly around its circumference, each having a working contact element 12, the tool 1 'shown in FIG. 3 has a total of 24 equally distributed holding elements 3', each with a working contact element 12
  • Tool 1 ' substantially correspond to those of the tool 1 as shown in Figure 2.
  • This cylindrical pin not visible in FIG. 3, is inserted into the inner cavity of a helical spring 19.
  • the opposite end of the coil spring 19 is inserted into the hub-shaped main body 2 'of the tool 1' and is over-molded there during the injection-molding production of the base body 2 'and thus incorporated in a form-fitting manner.
  • the pin-shaped ends of the support base 4 ' are inserted with a certain bias in the coil springs 19.
  • the diameter of the coil springs 19 tends to decrease, so that the pins of the support base 4' with increasing speed of the tool are also held increasingly solid , Slipping out of the holding elements 3 'is therefore not to be feared.
  • the stiffness of the selected coil springs 19 can be achieved with the tool different Abtrags characterizingen. Due to the elasticity of the coil springs 19, the tool 1 'is insensitive to a possibly too high pressure selected by the operator or even greater unevenness in the surface to be machined. If necessary, the coil springs 19 can also be mounted in tubular guide sleeves, which are embedded on the one hand in the base body 2 'in its injection molding production and on the other hand not zoom up to the hexagonal central region 8 of the support base 4' extend to ensure the longitudinal elasticity of the spring and thereby Nevertheless, to keep the lateral deflections of the coil springs 19 within limits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (12)

  1. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement, avec un corps de base (2, 2') en forme de disque dont l'axe de rotation s'étend perpendiculairement à un plan formé par le corps de base (2, 2'), ce corps de base comportant un moyen de réception (A) central destiné à être relié en couple au dispositif de commande d'outil, avec une pluralité d'éléments de retenue (3, 3') qui sont répartis suivant la direction circonférentielle du corps de base (2, 2') sur celui-ci, chaque élément de retenue (3, 3') retenant un élément de contact de travail (12) réalisé en un matériau très dur et les éléments de retenue (3, 3') avec les éléments de contact de travail (12) étant aptes à subir un débattement élastique dans une direction parallèle à l'axe de rotation du corps de base (2, 2'), caractérisé en ce que les éléments de contact de travail (12) sont chacun montés dans les éléments de retenue (3, 3') de manière à être mobiles en rotation autour d'un axe de rotation dont le sens comporte une composante perpendiculaire à l'axe de rotation du corps de base (2, 2').
  2. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement selon la revendication 1, caractérisé en ce que les éléments de contact de travail (12) possèdent une zone de travail (13) et une zone de retenue (14) plus épaisse que la zone de travail (13).
  3. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement, selon la revendication 1 ou 2, caractérisé en ce que chaque élément de retenue (3, 3') comporte un capuchon de retenue (5) apte à être relié par une liaison de force à une embase (4, 4'), le capuchon de retenue (5) comportant une ouverture (7) au travers de laquelle l'élément de contact de travail (12) passe à l'extérieur.
  4. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement selon la revendication 3, caractérisé en ce que le capuchon de retenue (5) est apte à être vissé sur l'embase (4, 4').
  5. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement selon la revendication 4, caractérisé en ce que, vissé en position extrême, le capuchon de retenue (5) est plastiquement déformé par le filetage extérieur (6) de l'embase (4, 4').
  6. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement selon l'une quelconque des revendications 3 à 5, caractérisé en ce que le capuchon de retenue (5) est hexalobé.
  7. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les éléments de contact de travail (12) sont construits symétriques par rapport à un plan perpendiculaire à leur axe de rotation.
  8. Outil rotatif (1) pour un dispositif de commande d'outil guidé manuellement selon l'une quelconque des revendications 1 à 7, caractérisé en ce que les éléments de retenue (3) métalliques s'étendent suivant la direction radiale du corps de base (2) jusqu'à l'intérieur de celui-ci, qu'ils sont munis d'un renflement (4*) à leurs extrémités détournées des éléments de contact de travail (12) et qu'ils sont noyés dans la matière plastique suffisamment élastique du corps de base (2).
  9. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement selon la revendication 8, caractérisé en ce que les éléments de retenue (3, 3') sont montés mobiles en rotation autour d'un axe de rotation dans le corps de base (2, 2'), cet axe de rotation étant confondu avec l'axe de rotation de l'élément de contact de travail (12).
  10. Outil rotatif (1, 1') pour un dispositif de commande d'outil guidé manuellement selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'élément de retenue (3, 3') est mobile élastiquement suivant la direction radiale.
  11. Outil rotatif (1') pour un dispositif de commande d'outil guidé manuellement selon l'une quelconque des revendications 1 à 10, caractérisé en ce que chaque élément de retenue (3') comporte un ressort hélicoïdal (19) dont l'axe longitudinal s'étend coaxialement par rapport à l'axe de rotation des éléments de contact de travail (12) et porte les éléments de contact de travail (12) d'une part et est relié à un corps de base (2') rigide d'autre part.
  12. Outil rotatif (1') pour un dispositif de commande d'outil guidé manuellement selon la revendication 11, caractérisé en ce que les embases (4') des éléments de retenue (3') sont introduits à force dans les ressorts hélicoïdaux (19).
EP20050000468 2004-01-15 2005-01-12 Outil rotatif Expired - Lifetime EP1559525B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002382 2004-01-15
DE200410002382 DE102004002382B3 (de) 2004-01-15 2004-01-15 Rotierbares Werkzeug

Publications (2)

Publication Number Publication Date
EP1559525A1 EP1559525A1 (fr) 2005-08-03
EP1559525B1 true EP1559525B1 (fr) 2007-01-10

Family

ID=33441963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050000468 Expired - Lifetime EP1559525B1 (fr) 2004-01-15 2005-01-12 Outil rotatif

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EP (1) EP1559525B1 (fr)
DE (2) DE102004002382B3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010060453A1 (de) * 2010-11-09 2012-01-19 Gerd Elfgen Werkzeug zur spanenden Bearbeitung von Materialien
CN112658935B (zh) * 2020-12-25 2022-05-03 广东昆大钢管有限公司 一种建筑用钢管机械式除锈机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839292A1 (de) * 1978-09-09 1980-03-13 Elfgen Apex Fraesmeissel fuer eine fraeseinrichtung, insbesondere zum abfraesen von strassenbelaegen
GB2051184B (en) * 1979-05-21 1984-02-08 Cincinnati Mine Machinery Co Cutter tool assembly for mining road working or earth moving machinery
US4614379A (en) * 1982-09-04 1986-09-30 Reinhard Wirtgen Apparatus for roughening road surfaces
SE501993C2 (sv) * 1992-01-29 1995-07-10 Sjoedin Sven Eric Roterande verktyg innefattande ett roterbart lagrat nav omkring vars omkrets ett antal bearbetningsspetsar är anordnade
DE20201000U1 (de) * 2002-01-24 2002-06-13 Elfgen, Gerd, 50389 Wesseling Fräseinrichtung

Also Published As

Publication number Publication date
EP1559525A1 (fr) 2005-08-03
DE102004002382B3 (de) 2004-12-16
DE502005000288D1 (de) 2007-02-22

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