EP3932253B1 - Brosse destinée à l'utilisation avec une motofaucheuse - Google Patents

Brosse destinée à l'utilisation avec une motofaucheuse

Info

Publication number
EP3932253B1
EP3932253B1 EP21153680.0A EP21153680A EP3932253B1 EP 3932253 B1 EP3932253 B1 EP 3932253B1 EP 21153680 A EP21153680 A EP 21153680A EP 3932253 B1 EP3932253 B1 EP 3932253B1
Authority
EP
European Patent Office
Prior art keywords
brush
inner cap
perforated disc
cap
bore
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
EP21153680.0A
Other languages
German (de)
English (en)
Other versions
EP3932253A1 (fr
EP3932253C0 (fr
Inventor
Jürgen Lessmann
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.)
Lessmann GmbH
Original Assignee
Lessmann 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 Lessmann GmbH filed Critical Lessmann GmbH
Priority to JP2021073334A priority Critical patent/JP2022013685A/ja
Publication of EP3932253A1 publication Critical patent/EP3932253A1/fr
Application granted granted Critical
Publication of EP3932253B1 publication Critical patent/EP3932253B1/fr
Publication of EP3932253C0 publication Critical patent/EP3932253C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/008—Disc-shaped brush bodies
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/08—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by clamping
    • A46B3/10—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by clamping into rings or the like
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/30—Brushes for cleaning or polishing

Definitions

  • the invention relates to a brush for use with a brush cutter, comprising an outer cap, an inner cap, a plurality of brush braids and a perforated disc having a plurality of recesses for receiving the brush braids, according to the type defined in more detail in the preamble of claim 1.
  • a generic brush is from the DE 20 2019 104 172 U1 Although this brush is adapted to a special system for connecting power tools, such as angle grinders, to the grinding or brushing tools used in them, the basic design of this brush can also be used with brush cutters.
  • the inventive size of the bore of the perforated disc used to accommodate the brush braids enables the offset of the inner cap to pass through the perforated disc so that the inner cap can come into contact with the outer cap or rest against it.
  • a further advantage of the solution according to the invention is its high rigidity, since it is possible according to the invention to connect the inner cap and the outer cap in the area of their flat surfaces, which leads to this increase in rigidity.
  • a recess in the inner cap created by the offset of the inner cap can be provided with a diameter such that a pressure disc of the brush cutter can be accommodated therein. This achieves a particularly good connection between the brush and the brush cutter and ensures that the nut that clamps the pressure disc against the brush cannot come loose.
  • a particularly secure connection between the inner cap and the outer cap is achieved when these components are welded together in the area of their flat surface, thus preventing any interfering edges from clamping the brush.
  • the perforated disc has a thickness of 2 to 4 mm, preferably 2.5 to 3.5 mm, particularly preferably 3 mm.
  • the recesses of the perforated disc are designed as elongated holes, the brush braids can be accommodated particularly well and safely by the perforated disc.
  • the elongated holes have a length of 6 to 8 mm, preferably 6.5 to 7.5 mm, particularly preferably 7 mm.
  • the distance between the recesses of the perforated disc in the circumferential direction can be 3 to 5 mm, preferably 3.5 to 4.5 mm, particularly preferably 3.8 to 3.9 mm. This solution allows for the accommodation of a large number of brush braids while maintaining sufficient strength of the perforated disc.
  • the diameter of the hole in the perforated disc can be 45 to 60 mm, preferably 50 to 56 mm, and particularly preferably 53 mm. This allows a specific brush cutter pressure disc to be accommodated particularly easily within the offset.
  • the Figures 1 and 2 show a brush 1, which is intended for connection to a brush cutter (not shown).
  • Fig. 2 Only one connecting element 2 is shown, from which a screw or threaded section 2a extends through the brush 1.
  • the connecting element 2 further comprises a support plate 2b facing away from the threaded section 2a and facing the brush cutter, supported on the outside of the brush 1, a nut 2c screwed onto the threaded section 2a, and a pressure plate 2d supported on the inside of the brush 1.
  • the brush 1 is thus clamped between the support plate 2b and the pressure plate 2d by screwing the nut 2c and fixed to the brush cutter.
  • the brush 1 When the brush 1 is driven by the brush cutter, it can rotate about a rotation axis 3.
  • the brush 1 comprises an outer cap 4, an inner cap 5, a plurality of brush braids 6, and a perforated disc 7 having a plurality of recesses 8 for receiving the brush braids 6.
  • the perforated disc 7 is also referred to as a braided disc.
  • the outer cap 4 and the inner cap 5 each have a bore 9 that serves to receive the connecting element 2.
  • the perforated disc 7 also has a bore 10, the size of which, however, is such that a crank 11 of the inner cap 5 directed towards the outer cap 4 covers the bore 10 the perforated disc 7.
  • the bore 10 of the perforated disc 7 is therefore significantly larger than the bore 9 of the outer cap 4 and the inner cap 5.
  • the offset 11 of the inner cap 5 creates a recess 5a on the inside of the inner cap 5, in which the pressure disc 2d is received. The diameter of the recess 5a is thus large enough to accommodate the pressure disc 2d.
  • the inner cap 5 rests with a flat surface 12 located between the offset 11 and the bore 9 of the inner cap 5 against a flat surface 13 of the outer cap 4 that is aligned with the inner cap 5.
  • the inner cap 5 and the outer cap 4 are connected to each other in the area of their flat surfaces 12 and 13. In the present case, this connection of the inner cap 5 to the outer cap 4 in the area of the flat surfaces 12 and 13 is achieved by welding.
  • This design allows the combined height of the outer cap 4 and the inner cap 5 in the area of the bore 9, i.e., the extension of the bore 9 in the longitudinal direction of the rotation axis of the brush 1, to be 3.5 mm or less, since the perforated disc 7, due to the size of the bore 10, is no longer located between the outer cap 4 and the inner cap 5 in this area and therefore contributes nothing to the extension of the bore 9 in the longitudinal direction of the rotation axis of the brush 1.
  • This allows the brush 1 to be securely attached to the connecting element 2 of the brush cutter, while also ensuring that the above-described positive connection between the screw or threaded section 2a and the pressure disc 2d can be established.
  • Fig. 3 the brush 1 is shown in a perspective view.
  • the diameter of the bore 10 of the perforated disc 7 is 45 to 60 mm, preferably 50 to 56 mm, particularly preferably 53 mm.
  • the recesses 8 of the perforated disc 7 are designed as elongated holes.
  • the elongated holes have a width of 3 to 5 mm, preferably 3.5 to 4.5 mm, particularly preferably 4 mm, and a length of 6 to 8 mm, preferably 6.5 to 7.5 mm, particularly preferably 7 mm.
  • the distance between the recesses 8 of the perforated disc 7 in the circumferential direction thereof is 3 to 5 mm, preferably 3.5 to 4.5 mm, particularly preferably 3.8 to 3.9 mm.

Landscapes

  • Harvester Elements (AREA)
  • Brushes (AREA)

Claims (10)

  1. Brosse (1) destinée à être utilisée avec une débroussailleuse, comprenant un capuchon extérieur (4), un capuchon intérieur (5), une pluralité de tresses de brosse (6) et un disque perforé (7), lequel présente une pluralité d'évidements (8) destinés à recevoir les tresses de brosse (6), le capuchon intérieur (5) présentant un coude (11) dirigé vers le capuchon extérieur (4), et le capuchon extérieur (4) et le capuchon intérieur (5) comportant des alésages respectifs (9) destinés à recevoir un élément de liaison (2) de la débroussaille,
    caractérisée en ce que
    le disque perforé (7) comporte un alésage (10) de taille telle que le coude (11) du capuchon intérieur (5) passe à travers le trou (10) du disque perforé (7), en ce que le capuchon intérieur (5) s'appuie avec sa surface plane (12) située entre le coude (11) et le trou (9) du capuchon intérieur (5) contre une surface plane (13) du capuchon extérieur (4) orientée vers le capuchon intérieur (5), et en ce que le capuchon intérieur (5) et le capuchon extérieur (4) sont reliés entre eux dans la zone de leurs surfaces planes (12, 13).
  2. Brosse selon la revendication 1,
    caractérisée en ce que
    un évidement (5a) du capuchon intérieur (5) résultant du coude (11) du capuchon intérieur (5) présente un diamètre tel qu'une rondelle de pression (2d) de la débroussailleuse peut y être logée.
  3. Brosse selon la revendication 1 ou 2,
    caractérisée en ce que
    le capuchon intérieur (5) et le capuchon extérieur (4) sont soudés l'un à l'autre dans la zone de leurs surfaces planes (12, 13).
  4. Brosse selon la revendication 1, 2 ou 3,
    caractérisée en ce que
    le disque perforé (7) comporte entre 20 et 40, de préférence entre 25 et 35, et de manière particulièrement préférée 30, évidements (8) destinés à recevoir les tresses de brosse (6).
  5. Brosse selon les revendications 1 à 4,
    caractérisée en ce que
    le disque perforé (7) présente une épaisseur comprise entre 2 et 4 mm, de préférence entre 2,5 et 3,5 mm, de manière particulièrement préférée 3 mm.
  6. Brosse selon les revendications 1 à 5,
    caractérisée en ce que
    les évidements (8) du disque perforé (7) sont réalisés sous forme de trous oblongs.
  7. Brosse selon la revendication 6,
    caractérisée en ce que
    les trous oblongs ont une largeur de 3 à 5 mm, de préférence de 3,5 à 4,5 mm, de manière particulièrement préférée 4 mm.
  8. Brosse selon la revendication 6 ou 7,
    caractérisée en ce que
    les trous oblongs ont une longueur de 6 à 8 mm, de préférence de 6,5 à 7,5 mm, de manière particulièrement préférée 7 mm.
  9. Brosse selon les revendications 1 à 8,
    caractérisée en ce que
    la distance entre les évidements (8) du disque perforé (7) dans le sens circonférentiel de celui-ci est comprise entre 3 et 5 mm, de préférence entre 3,5 et 4,5 mm, de manière particulièrement préférée entre 3,8 et 3,9 mm.
  10. Brosse selon l'une des revendications 1 à 9,
    caractérisée en ce que
    le diamètre du trou (10) du disque perforé (7) est compris entre 45 et 60 mm, de préférence entre 50 et 56 mm, de manière particulièrement préférée 53 mm.
EP21153680.0A 2020-06-30 2021-01-27 Brosse destinée à l'utilisation avec une motofaucheuse Active EP3932253B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021073334A JP2022013685A (ja) 2020-06-30 2021-04-23 草刈り機用のブラシ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202020103760.9U DE202020103760U1 (de) 2020-06-30 2020-06-30 Bürste zur Verwendung mit einer Motorsense

Publications (3)

Publication Number Publication Date
EP3932253A1 EP3932253A1 (fr) 2022-01-05
EP3932253B1 true EP3932253B1 (fr) 2025-10-01
EP3932253C0 EP3932253C0 (fr) 2025-10-01

Family

ID=71739528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21153680.0A Active EP3932253B1 (fr) 2020-06-30 2021-01-27 Brosse destinée à l'utilisation avec une motofaucheuse

Country Status (3)

Country Link
EP (1) EP3932253B1 (fr)
JP (1) JP2022013685A (fr)
DE (1) DE202020103760U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202026101065U1 (de) 2026-02-26 2026-05-07 Lessmann Gmbh Bürste zur Verwendung mit einem rotierenden Werkzeug

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2062047A (en) * 1934-06-01 1936-11-24 Osborn Mfg Co Brush
GB810527A (en) * 1956-12-10 1959-03-18 Osborn Mfg Co Cup brush
US3106739A (en) * 1960-09-22 1963-10-15 Osborn Mfg Co End or cup brush and method of making
US3147503A (en) * 1961-09-25 1964-09-08 Osborn Mfg Co Modified brushing tool
US3335444A (en) * 1966-08-15 1967-08-15 Karl E Weiler Miniature brush construction and means of stem mounting
JPS539769U (fr) * 1977-07-26 1978-01-27
JPH08216035A (ja) * 1995-02-14 1996-08-27 Hotani:Kk 植毛ディスク用素材板
US20050102784A1 (en) * 2003-11-14 2005-05-19 David Harris Universally attachable rotary brush
JP3170832U (ja) * 2011-05-10 2011-10-06 和歌山緑化有限会社 防草シート清掃のための刈払機用アタッチメントカップブラシ
JP2015013239A (ja) * 2013-07-03 2015-01-22 日立工機株式会社 作業機用アタッチメント、作業機
DE202019104172U1 (de) 2019-07-30 2019-08-07 Lessmann Gmbh Bürste zur Verwendung mit einem rotierenden Elektrowerkzeug

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202026101065U1 (de) 2026-02-26 2026-05-07 Lessmann Gmbh Bürste zur Verwendung mit einem rotierenden Werkzeug

Also Published As

Publication number Publication date
DE202020103760U1 (de) 2020-07-08
EP3932253A1 (fr) 2022-01-05
JP2022013685A (ja) 2022-01-18
EP3932253C0 (fr) 2025-10-01

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