EP2422941B1 - Lame circulaire avec trou central sans coins mais non circulaire - Google Patents

Lame circulaire avec trou central sans coins mais non circulaire Download PDF

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Publication number
EP2422941B1
EP2422941B1 EP11178248.8A EP11178248A EP2422941B1 EP 2422941 B1 EP2422941 B1 EP 2422941B1 EP 11178248 A EP11178248 A EP 11178248A EP 2422941 B1 EP2422941 B1 EP 2422941B1
Authority
EP
European Patent Office
Prior art keywords
knife disc
drive shaft
recess
centre recess
entrainer
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.)
Not-in-force
Application number
EP11178248.8A
Other languages
German (de)
English (en)
Other versions
EP2422941A1 (fr
Inventor
Bernhard Teufel
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
Priority to PL11178248T priority Critical patent/PL2422941T3/pl
Publication of EP2422941A1 publication Critical patent/EP2422941A1/fr
Application granted granted Critical
Publication of EP2422941B1 publication Critical patent/EP2422941B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • B26D1/1435—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member
    • B26D7/2621—Means for mounting the cutting member for circular cutters

Definitions

  • Such cutting discs are known in many forms, the cutting discs, seen in plan view, differ essentially by their diameter, the shape of the central recess and the possible presence of further recesses.
  • the central recess As a circular recess.
  • the central recess can - depending on the configuration - be relatively small or relatively large.
  • a purely circular Mittenaus strictlyung does not allow a rotationally fixed connection to the drive shaft. Therefore, additional measures have been taken in the prior art cutting wheels to transfer the torque from the drive shaft to the cutter disk.
  • the number of further holes or recesses varies. In some cases, only a single such recess or hole is present. In other cases, the number of holes or recesses is two. Also more than two such Holes or recesses are known. Sometimes, up to six such recesses or holes are present.
  • central recess substantially circular, but, starting from the per se circular recess, at least one radially outwardly facing U-shaped recess is arranged.
  • the number of U-shaped recesses varies again. Minimal, a single such recess is present. There are also embodiments with more than one such U-shaped recess, for example with four such recesses.
  • a blade disc for cutting a material which has on its outer circumference a peripheral edge on the cutting edge.
  • the cutter disk has a center recess for attaching the cutter disk to a driver of a drive shaft rotatable about a rotation axis.
  • a circular saw blade - in particular for cutting concrete - known wherein the saw blade has a number of saw teeth on its outer periphery.
  • the saw blade has a central recess for attaching the saw blade to a driver of a drive shaft rotatable about a rotation axis.
  • the central recess is formed as a cornerless, but not circular - in particular as a plano-convex - center recess, so that the saw blade is fixed in rotation on the drive shaft after mounting on the driver.
  • the prior art knife discs are often made of cemented carbide or ceramic. Both carbide and ceramic are relatively brittle and brittle. In operation, therefore, it often happens that the blade breaks and must be replaced by a new blade.
  • the object of the present invention is to design a cutting disc of the type mentioned in such a way that the risk of breakage is reduced despite a long service life.
  • the center recess of a knife disc of the type mentioned as cornerless, but not circular Mittenaus brieflyung form, so that the blade disc is fixed in rotation on the drive shaft after plugging on the driver.
  • the contour of the central recess is a purely convex curve, for example an ellipse or an oval.
  • the cutting disc made of hard metal and / or ceramic.
  • the central recess is not circular, a distance varies from the boundaries of the central recess opposite the axis of rotation.
  • the maximum distance of such limits is 70% to 80% of an outer diameter of the cutting discs.
  • a minimum distance of such boundaries is preferably 40% to 70% of the outer diameter.
  • the central recess is arranged centrically to the axis of rotation of the drive shaft.
  • the MittenausEnglishung seen in this case in the direction of rotation of the drive shaft on a periodicity is arranged centrically to the axis of rotation of the drive shaft.
  • the central recess is the only recess of the knife disc. This is in particular preferable to manufacture and also reduces the risk of breakage even further.
  • the present invention further relates to a drive shaft for a knife wheel of the type described above, wherein the drive shaft has a driver whose outer contour corresponds to the center recess of the cutter disk.
  • the present invention further relates to a driver for a drive shaft, wherein the driver has a central recess with which the driver can be plugged onto a drive shaft, wherein the driver has an outer contour which corresponds to the center recess of a cutter disk according to the invention.
  • the knife disk 1 is relatively thin in the rule.
  • a thickness d of the cutter disk 1 is usually between 1 millimeter and 4 millimeters, often less than 2.5 millimeters.
  • the cutter disk 1 is generally circular on its outer circumference 3.
  • An outer diameter D of the cutter disk 1 is generally well above 10 cm, for example 20 cm to 35 cm.
  • the cutter disk 1 has on its outer circumference 3 a cutting edge 4 which rotates along the outer circumference 3.
  • the cutting edge 4 can - see FIG. 3 - Be designed as a V-shaped cutting edge 4.
  • the cutting edge 4 - see FIG. 4 - have a steep desk shape.
  • the knife disc 1 has a central recess 5. Due to the presence of the central recess 5, the knife disc 1 can be plugged onto a drive shaft 6. It is placed there on a driver 7 of the drive shaft 6. About the driver 7, the cutter disk 1 is rotatable about a rotation axis 8 of the drive shaft 6.
  • the central recess 5 is - see in particular FIG. 2 - Although designed as a "round”, ie cornerless center recess 5. But it is not designed as a circular Mittenausnaturalung 5. It is therefore fixed in rotation on the drive shaft 6 after plugging on the driver 7, even if it still has to be secured axially.
  • the central recess 5 is in the prior art - see purely by way of example FIG. 5 - Convex-convex.
  • the outer contour of the central recess 5 consists of 4 convex semicircles, which merge into each other via 4 concave quadrants.
  • the radii r of the semicircles are equal to each other.
  • the radii r 'of the quarter circles are equal to each other.
  • radii of semicircles are equal to radii of quarter circles.
  • the - in the present case common - radius r, r 'of the half and quarter circles is preferably about 1/8 of the diameter D of the cutter disk. 1
  • the outer contour of the central recess 5 is formed as a plano-convex curve, ie as a curve consisting of straight sections, which merge into one another via convex sections.
  • Figure 6 shows an example of such a configuration.
  • the radius r "of the quadrants is preferably the same for all quadrants, for example, it may be about 1/8 of the outer diameter D of the cutter disk 1.
  • The" midpoints "9 of the quarter circles may, for example, have a distance a from the axis of rotation 8 which is approximately is equal to half the outer diameter D of the cutter disk 1.
  • the center recess 5 - see FIG. 2 - a pure (ie everywhere) convex curve.
  • the central recess 5 as shown by FIG. 2 be designed as an ellipse.
  • an oval shape is possible.
  • FIG. 2 is the length of a long half-axis 10 of the ellipse, for example, about 3/8 of the outer diameter D of the cutter disk 1.
  • a length of a short half-axis 11 of the ellipse is in the embodiment of FIG. 2 at about 1/4 of the outer diameter D of the knife disc. 1
  • the size of the central recess 5 can be determined as needed. Preferably lies - see FIG. 2 - A maximum distance from boundaries of the central recess 5, which are opposite to each other with respect to the axis of rotation 8, between 70% to 80% of the outer diameter D of the cutter disc 1. Further lies - see again FIG. 2 - A minimum distance from boundaries of the central recess 5, which are opposite to each other with respect to the axis of rotation 8, between 40% and 70% of the outer diameter D of the cutter disk. 1
  • the maximum distance is about 75% of the outer diameter D of the cutter disk 1.
  • the minimum distance is about 50% for the design of FIG. 2 ,
  • the central recess 5 is preferably arranged centrically to the axis of rotation 8 of the drive shaft 6. Furthermore, the central recess 5 seen in the direction of rotation of the drive shaft 6 preferably has a periodicity. It is therefore possible to remove the cutter disk 1 from the driver 7, then to rotate it about 360 ° / n about the axis of rotation 8 and then put it back on the driver 7. In the embodiment of FIG. 2 For example, the value n has the value 2. However, depending on the design of the central recess 5, other values are also possible, for example 3, 5 and 6.
  • the central recess 5 is indeed cornerless, but not circular, is - a correspondingly corresponding configuration of the driver 7 provided already realized by attaching the blade disc 1 on the driver 7 a rotationally fixed fixation of the blade disc 1 on the drive shaft 6 , Further recesses for driving pins and the like are therefore not required. Rather, it is possible that the central recess 5 is the only recess of the knife disc.
  • the material of the blade disc 1 can be selected as needed.
  • the material of the knife disc can be a leash ceramic. Alternatively, it may be a hard metal.
  • the driver 7 of the drive shaft 6 must, as already mentioned, have an outer contour which corresponds to the central recess 5 of the cutter disk 1. It is possible that the driver 7 is part of the drive shaft 6, with the drive shaft 6 is thus integrally connected. Alternatively, it may be at the driver 7 is an independent element which is detachably connected to the drive shaft 6. Such a driver 7 is in the FIGS. 7 and 8th shown. In this case, the driver 7 - in addition to its outer contour; this is formed as already described - in turn, also a central recess 12.
  • the center recess 12 of the driver 7 can in principle have any shape. It may - analogous to the central recess 5 of the blade disc 1, although without corners, but not circular.
  • the center recess 12 of the driver 7 may be circular.
  • the center recess 12 of the driver 7 is formed as a square MittenausEnglishung 12, for example as a square or hexagonal MittenausANSung 12, so that the driver 7 is already held against rotation by plugging onto the drive shaft 5, even if it still has to be fixed axially.
  • the present invention has many advantages. So it is particularly easy to implement. It may even be possible to rework a center recess of a prior art knife disk so that it is designed according to the invention after finishing. The risk of breakage of a cutting disc 1 according to the invention is considerably reduced compared with cutting discs of the prior art. Also, relatively little material is needed for the cutter disk 1 according to the invention. This is particularly important because, for example, carbide is relatively expensive.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (9)

  1. Disque porte-lames servant à découper un matériau (2),
    - le disque porte-lames présentant, au niveau de sa périphérie extérieure (3), une arête tranchante (4) en rotation autour de la périphérie extérieure (3),
    - le disque porte-lames présentant un évidement central (5) servant à emboîter le disque porte-lames sur un entraîneur (7) d'un arbre d'entraînement (6) pouvant tourner autour d'un axe de rotation (8),
    - l'évidement central (5) étant réalisé sous la forme d'un évidement central (5) sans coin, toutefois non circulaire, de sorte que le disque porte-lames est fixé de manière solidaire en rotation sur l'arbre d'entraînement (6) après l'emboîtement sur l'entraîneur (7),
    caractérisé en ce que
    - l'évidement central (5) est une courbe purement convexe,
    et en ce que
    - le disque porte-lames est composé de métal dur et/ou de céramique.
  2. Disque porte-lames selon la revendication 1,
    caractérisé
    en ce que l'évidement central (5) est réalisé en forme d'ellipse ou d'ovale.
  3. Disque porte-lames selon la revendication 1 ou 2,
    caractérisé
    en ce qu'une distance maximale entre des limites, se faisant face par rapport à l'axe de rotation (8), de l'évidement central (5) représente 70 à 80 % d'un diamètre extérieur (D) du disque porte-lames.
  4. Disque porte-lames selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce qu'une distance minimale entre des limites se faisant face de l'évidement central (5) représente 40 à 70 % d'un diamètre extérieur (D) du disque porte-lames.
  5. Disque porte-lames selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que l'évidement central (5) est disposé de manière centrée par rapport à l'axe de rotation (8) de l'arbre d'entraînement (6).
  6. Disque porte-lames selon la revendication 5,
    caractérisé
    en ce que l'évidement central (5) présente, vu dans le sens de rotation de l'arbre d'entraînement (6), une périodicité.
  7. Disque porte-lames selon l'une quelconque des revendications précédentes,
    caractérisé
    en ce que l'évidement central (5) est l'unique évidement du disque porte-lames.
  8. Arbre d'entraînement pour un disque porte-lames (1) selon l'une quelconque des revendications précédentes, l'arbre d'entraînement présentant un entraîneur (7), dont le contour extérieur correspond à l'évidement central (5) du disque porte-lames (1).
  9. Entraîneur pour un arbre d'entraînement (6), l'entraîneur présentant un évidement central (12), par lequel l'entraîneur peut être emboîté sur un arbre d'entraînement (6), l'entraîneur présentant un contour extérieur, qui correspond à l'évidement central (5) d'un disque porte-lames (1) selon l'une quelconque des revendications 1 à 7.
EP11178248.8A 2010-08-23 2011-08-22 Lame circulaire avec trou central sans coins mais non circulaire Not-in-force EP2422941B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11178248T PL2422941T3 (pl) 2010-08-23 2011-08-22 Tarcza noża z niezawierającym narożników, ale nie okrągłym wycięciem środkowym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010037109A DE102010037109A1 (de) 2010-08-23 2010-08-23 Messerscheibe zum Zerschneiden eines Materials

Publications (2)

Publication Number Publication Date
EP2422941A1 EP2422941A1 (fr) 2012-02-29
EP2422941B1 true EP2422941B1 (fr) 2016-01-13

Family

ID=44720582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11178248.8A Not-in-force EP2422941B1 (fr) 2010-08-23 2011-08-22 Lame circulaire avec trou central sans coins mais non circulaire

Country Status (3)

Country Link
EP (1) EP2422941B1 (fr)
DE (1) DE102010037109A1 (fr)
PL (1) PL2422941T3 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920610C2 (de) * 1979-05-22 1984-07-05 Jagenberg-Werke AG, 4000 Düsseldorf Rotierendes Scheibenmesser
US5303688A (en) * 1992-04-03 1994-04-19 Chiuminatta Edward R Mounting arbor for saw cutting blades
DE102004056642A1 (de) * 2004-11-24 2006-06-01 Ziaei, Masoud, Dr. Einstellbare Profilkonturen mit mehreren Exzentrizitäten für formschlüssige Welle-Nabe-Verbindungen

Also Published As

Publication number Publication date
EP2422941A1 (fr) 2012-02-29
DE102010037109A1 (de) 2012-02-23
PL2422941T3 (pl) 2016-07-29

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