WO2000072657A1 - Device for fixing a hedge-trimmer wire-holder head to the rotary clutch shaft driving such a head - Google Patents

Device for fixing a hedge-trimmer wire-holder head to the rotary clutch shaft driving such a head Download PDF

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Publication number
WO2000072657A1
WO2000072657A1 PCT/FR2000/001482 FR0001482W WO0072657A1 WO 2000072657 A1 WO2000072657 A1 WO 2000072657A1 FR 0001482 W FR0001482 W FR 0001482W WO 0072657 A1 WO0072657 A1 WO 0072657A1
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WO
WIPO (PCT)
Prior art keywords
head
shaft
ring
holder
wire
Prior art date
Application number
PCT/FR2000/001482
Other languages
French (fr)
Inventor
Michel Chabrut
Claude Leroux
Original Assignee
Michel Chabrut
Claude Leroux
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
Priority claimed from FR9907300A external-priority patent/FR2794337A1/en
Application filed by Michel Chabrut, Claude Leroux filed Critical Michel Chabrut
Priority to AU52285/00A priority Critical patent/AU5228500A/en
Publication of WO2000072657A1 publication Critical patent/WO2000072657A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416—Flexible line cutters

Definitions

  • the present invention relates to a device for attaching a brush-cutter wire head to the rotary drive shaft for driving such a head, as well as a brush-cutter wire head capable of being mounted on a shaft. drive motor through said device.
  • Attaching a wire head, also called nylon head on the output of a rotary brushcutter motor shaft remains a complex task due to the lack of standardization of the shaft outputs. Indeed, we find today on the market brushcutter trees with male outlet or female outlet. For each category of tree defined by the type of its output, the diameter of the tree can itself vary within a range between 8 and 17 mm. This lack of harmonization of the brushcutter shaft outputs poses a problem for head manufacturers. To date, the latter have used two types of mounting to allow the coupling of the wire-carrying head to the brushcutter shaft. A first assembly consists to screw the wire head directly onto the output shaft of the brushcutter's rotary motor output.
  • the wire-carrying head can only adapt to a single shaft diameter.
  • a second mounting method consists in using adapters which are on the one hand fixed on the outlet of the rotary brushcutter motor shaft and receive, on the other hand, by screwing, the wire-carrying head. These adapters being directly dependent on the diameter of the shaft, this results in the need for each manufacturer to have a large range of adapters which generates an additional cost at the level of the manufacture of the wire-carrying head and which requires having a large stock of adapters to meet all market needs.
  • An object of the present invention is to provide a new device for attaching a brushcutter son carrier head to a rotary drive shaft for driving such a head, this device making it possible to be exempt from a large stock adapters and being able, due to its design, to adapt to a large number of drive shafts independently of the diameter of one drive shaft and the type of outlet (male or female) of this drive shaft.
  • Another object of the present invention is to provide a device for attaching a brushcutter wire carrier head to a rotary motor shaft, the design of which allows a reduced bulk in the state mounted on the rotary shaft and easy storage in the unassembled position.
  • Another object of the present invention is to provide a brushcutter son head capable of perfectly integrating such a fixing device.
  • the subject of the invention is a device for attaching a wire-brush cutter head to the rotary drive shaft for driving such a head, this shaft being provided at or near its end. of a -. standard shoulder for a range of shaft diameters, characterized in that the device consists mainly of an adapter ring provided on the one hand, on at least one of its front faces, with a dimensioned countersink to cover by abutment the standard shoulder of the rotary shaft and to be maintained in non-sliding bearing contact under the effect of an axial compression force, on the other hand means for coupling to a wire-carrying head for securing in rotation the wire holder head, ring and shaft.
  • the adapter ring has on its opposite end faces two differentiated counterbores to adapt to two different standards of drive shaft shoulder.
  • the fixing device is then reversible and makes it possible to adapt substantially to 90% of the drive shafts found on the market by means of a single part, which makes it possible to considerably reduce stocks.
  • the subject of the invention is also a wire-brush cutter head capable of being mounted by means of the fixing device on a motor shaft driving the head, characterized in that it comprises a hub housing the device fixation.
  • Figure 1 is an exploded schematic view of a block brushcutter motor with male output
  • FIG. 2 is similar to FIG. 1, for an engine block with female output;
  • FIG. 3 represents a schematic view of a device according to the invention intended to be fixed on a rotary motor shaft of the male outlet type or of the female outlet type;
  • FIG. 4 represents an attachment device in the assembled state to the shaft and to the wire-carrying head
  • FIG. 5 represents a front view of the adapter ring of the fixing device
  • FIG. 6 represents a bottom view of the ring of FIG. 3.
  • the device, object of the invention is intended to allow the attachment of a head 1 brushcutter son holder, also called nylon head, to the shaft 2 rotary motor for driving such a head 1.
  • the shaft 2 rotary motor driving a brushcutter is provided, at or near its end, with a standard shoulder 3 for a range of diameters of the shaft 2.
  • the diameter of the shaft may vary between 8 and 10 mm.
  • the diameter of the shaft may vary from 10 to 17 mm.
  • the dimensions 20 mm and 25.4 mm are the most common standard shoulder dimensions 3 on the market.
  • the device, object of the invention is characterized by the use of this standard shoulder to allow the attachment of the head 1 wire holder to the shaft 2 of brushcutter.
  • the device according to the invention mainly consists of an adapter ring 4, generally metallic, provided on the one hand, on at least one of its front faces, with a countersink shown in 5A, 5B and dimensioned for covering the standard shoulder 3 of the rotary shaft 2 by swaging, on the other hand means for coupling to a head 1 wire holder to secure in rotation head 1 wire holder, ring 4 and shaft 2.
  • this adapter ring 4 has on its opposite end faces a counterbore 5A, 5B differentiated to adapt to the two main standards of shoulder 3 of shaft 2 of drive found in the market.
  • a counterbore 5A, 5B differentiated to adapt to the two main standards of shoulder 3 of shaft 2 of drive found in the market.
  • one of the counterbores will have a diameter close to 20 mm while the other counterbore will have a diameter close to 25.4 mm.
  • One or other of the countersinks of this ring is therefore dimensioned to come over the standard shoulder of the rotary shaft. The ring is then held in this position in non-sliding bearing contact under the effect of an axial compression force.
  • the axial compression force to be applied to maintain the standard shoulder of the shaft 2 against the counterbore of the counterbore 5A, 5B and allow a connection between the adapter ring 4 and the motor shaft 2 is obtained by means of the original hardware fitted to the output of the motor shaft 2.
  • this hardware can consist of a washer 8 and a nut 9B for a male output ( Figure 1) or a washer 8 and a screw 9A ( Figure 2) in the case of a female shaft outlet. These screws will be used to hold the ring 4 in application against the shoulder 3.
  • the coupling means between head 1 wire holder and ring 4 consist for example of a peripheral thread 6 of the ring 4 cooperating with a shouldered thread 7 formed in the head 1 wire holder.
  • the attachment of the head 2 wire holder to the adapter ring 4 is done simply by screwing.
  • the pitch of this peripheral thread 6 will be chosen according to the direction of rotation of the brushcutter shaft.
  • the fixing device consists on the one hand of the adapter ring 4, on the other hand of a compensation washer.
  • Such a fixing device can be sold alone or sold with a head 1 brushcutter son holder. In this case, due to its design, it will in no way increase the size of such a head during its storage.
  • the head 1 of the brushcutter son holder capable of being mounted by means of the aforementioned fixing device, comprises a hub 10 housing the fixing device.
  • this fixing device can be housed in the hub 10 in the assembled state of the wire-carrying head on the shaft or in the disassembled state of the latter.
  • This hub 10 is tapped at near its free end to be fixed by screwing to the fixing device. The thread is shown in 7 in the figures.
  • a shoulder 14 housed in the hub 10 is used as a limit stop during this screwing.
  • other embodiments of the coupling means could have been envisaged.
  • This hub 10 is further extended radially by a crown 11 frustoconical son holder.
  • the orifices 12 for the passage of the cutting wires are formed in the vicinity of the largest circumference of the crown 11.
  • the wall of the large base of the son-carrying crown 11 is in turn made concave.
  • Each orifice 12 for the passage of the cutting wires from the concave base of the crown joins the inclined conical plane of the crown at 45 ° by forming an angle of 75 ° with the upper side thereof and opens out there through its lower orifice.
  • the orifices 12 for the passage of the cutting wires can be of different diameters to allow the passage of wires of different diameters.
  • the user will be able to select the pairs of orifices according to the section of the wires. It will generally position the wires in diametrically opposite orifices.
  • the wires are precut to a length corresponding to the safety standards of the brushcutter protection casings. The positioning of the wires on the brushcutter head does not require any tools. Commissioning is very quick. Each wire can be introduced into a hole on the side of the conical underside of the crown and exit through this same hole on the side of the curved upper face of the crown.
  • the wire is then folded in two in the form of a jumper and reintroduced into a neighboring hole of the same diameter on the side of the curved upper face of the crown to emerge through this same hole on the side of the conical lower face of the crown.
  • Such a positioning of the wires offers the advantage of self-tightening of the rotating cutting wires on the one hand by the centrifugal force which straightens and stretches the wires in a horizontal position and, on the other hand, through the hole outlets which provide stopping angles to the curvature of the wires positioned in a jumper over a pair of holes and exert a constraint on looping these same wires.
  • the top of the crown 11 is provided with a stop 13 for supporting the ground which is free to rotate.
  • the contact face of the ground support of this stop 13 has a hemispherical shape. Thanks to this free mounting in rotation, it is possible to put the head 1 wire holder in support on the ground in working situation in any stability whatever the nature of the ground.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

The invention concerns a device for fixing the head (1) of a hedge-trimmer wire-holder to the rotary clutch shaft (2) driving such a head (1), said shaft (2) being provided at its end or in the proximity thereof with a standard shoulder for a range of diameters of the shaft (2). Said device is characterised in that it mainly consists of an adapter ring (4) provided, on at least one of its front surfaces, with a countersink (5A, 5B) dimensioned to be fitted on the standard shoulder (3) of the rotary shaft (2) by dimpling and to be maintained in non-slipping support contact under the effect of an axial compressive stress, and with means to be coupled to a wire-holder head (1) to cause the wire-holder head (1), the ring (4) and the shaft (2) to be integral in rotation.

Description

Dispositif pour la fixation d'une tête porte-fils de débroussailleuse à l'arbre moteur rotatif d'entraînement d'une telle têteDevice for attaching a brushcutter head to the rotary drive shaft for driving such a head
La présente invention concerne un dispositif pour la fixation d'une tête porte-fils de débroussailleuse à l'arbre moteur rotatif d'entraînement d'une telle tête, ainsi qu'une tête porte-fils de débroussailleuse apte à être montée sur un arbre moteur d'entraînement par l'intermédiaire dudit dispositif.The present invention relates to a device for attaching a brush-cutter wire head to the rotary drive shaft for driving such a head, as well as a brush-cutter wire head capable of being mounted on a shaft. drive motor through said device.
Fixer une tête porte-fils, encore appelée tête Nylon sur la sortie d'un arbre moteur rotatif de débroussailleuse, demeure une tâche complexe en raison de 1 ' absence de standardisation des sorties d'arbre. En effet, on rencontre aujourd'hui sur le marché des arbres de débroussailleuse à sortie mâle ou à sortie femelle. Pour chaque catégorie d'arbre définie par le type de sa sortie, le diamètre de l'arbre peut lui-même varier dans une plage comprise entre 8 et 17 mm. Cette absence d'harmonisation des sorties d'arbre de débroussailleuse pose un problème aux fabricants de têtes. Ces derniers utilisent jusqu'à ce jour deux types de montage pour permettre le couplage de la tête porte-fils à l'arbre de débroussailleuse. Un premier montage consiste à visser directement la tête porte-fils sur l'arbre de sortie de la sortie de l'arbre moteur rotatif de la débroussailleuse. Dans ce cas, la tête porte-fils ne pourra s'adapter qu'à un seul diamètre d'arbre. Un second mode de montage consiste à utiliser des adaptateurs qui sont d'une part fixés sur la sortie de l'arbre moteur rotatif de débroussailleuse et reçoivent, d'autre part, par vissage, la tête porte-fils. Ces adaptateurs étant directement dépendants du diamètre de l'arbre, il en résulte la nécessité pour chaque fabricant de disposer d'une gamme importante d'adaptateurs qui engendre un surcoût au niveau de la fabrication de la tête porte-fils et qui nécessite de disposer d'un stock important d'adaptateurs pour satisfaire tous les besoins du marché.Attaching a wire head, also called nylon head on the output of a rotary brushcutter motor shaft, remains a complex task due to the lack of standardization of the shaft outputs. Indeed, we find today on the market brushcutter trees with male outlet or female outlet. For each category of tree defined by the type of its output, the diameter of the tree can itself vary within a range between 8 and 17 mm. This lack of harmonization of the brushcutter shaft outputs poses a problem for head manufacturers. To date, the latter have used two types of mounting to allow the coupling of the wire-carrying head to the brushcutter shaft. A first assembly consists to screw the wire head directly onto the output shaft of the brushcutter's rotary motor output. In this case, the wire-carrying head can only adapt to a single shaft diameter. A second mounting method consists in using adapters which are on the one hand fixed on the outlet of the rotary brushcutter motor shaft and receive, on the other hand, by screwing, the wire-carrying head. These adapters being directly dependent on the diameter of the shaft, this results in the need for each manufacturer to have a large range of adapters which generates an additional cost at the level of the manufacture of the wire-carrying head and which requires having a large stock of adapters to meet all market needs.
Un but de la présente invention est de proposer un nouveau dispositif pour la fixation d'une tête porte-fils de débroussailleuse à un arbre moteur rotatif d'entraînement d'une telle tête, ce dispositif permettant de s'exempter d'un stock important d'adaptateurs et étant apte, du fait de sa conception, à s'adapter sur un grand nombre d'arbres moteurs indépendamment du diamètre de 1 ' arbre moteur et du type de sortie (mâle ou femelle) de cet arbre moteur.An object of the present invention is to provide a new device for attaching a brushcutter son carrier head to a rotary drive shaft for driving such a head, this device making it possible to be exempt from a large stock adapters and being able, due to its design, to adapt to a large number of drive shafts independently of the diameter of one drive shaft and the type of outlet (male or female) of this drive shaft.
Un autre but de la présente invention est de proposer un dispositif pour la fixation d'une tête porte-fils de débroussailleuse à un arbre moteur rotatif dont la conception permet un encombrement réduit à 1 ' état monté sur l'arbre rotatif et un stockage aisé en position non montée.Another object of the present invention is to provide a device for attaching a brushcutter wire carrier head to a rotary motor shaft, the design of which allows a reduced bulk in the state mounted on the rotary shaft and easy storage in the unassembled position.
Un autre but de la présente invention est de proposer une tête porte-fils de débroussailleuse apte à intégrer parfaitement un tel dispositif de fixation.Another object of the present invention is to provide a brushcutter son head capable of perfectly integrating such a fixing device.
A cet effet, l'invention a pour objet un dispositif pour la fixation d'une tête porte-fils de débroussailleuse à l'arbre moteur rotatif d'entraînement d'une telle tête, cet arbre étant muni à ou au voisinage de son extrémité d'un -. épaulement standard pour une plage de diamètres de l'arbre, caractérisé en ce que le dispositif est constitué principalement d'une bague d'adaptation munie d'une part, sur au moins l'une de ses faces frontales, d'un lamage dimensionné pour coiffer par embrèvement 1 ' épaulement standard de l'arbre rotatif et être maintenu en contact d'appui non glissant sous l'effet d'un effort de compression axial, d'autre part de moyens d'accouplement à une tête porte-fils pour solidariser en rotation tête porte-fils, bague et arbre.To this end, the subject of the invention is a device for attaching a wire-brush cutter head to the rotary drive shaft for driving such a head, this shaft being provided at or near its end. of a -. standard shoulder for a range of shaft diameters, characterized in that the device consists mainly of an adapter ring provided on the one hand, on at least one of its front faces, with a dimensioned countersink to cover by abutment the standard shoulder of the rotary shaft and to be maintained in non-sliding bearing contact under the effect of an axial compression force, on the other hand means for coupling to a wire-carrying head for securing in rotation the wire holder head, ring and shaft.
Grâce à la fixation de la bague d'adaptation non plus directement sur l'arbre mais sur un épaulement standard équipant l'arbre, il devient aisé de concevoir un dispositif apte à s'adapter à n'importe quelle sortie d ' arbre.By fixing the adapter ring no longer directly on the shaft but on a standard shoulder fitted to the shaft, it becomes easy to design a device capable of adapting to any output from the shaft.
Selon une forme de réalisation préférée de l'invention, la bague d'adaptation comporte sur ses faces frontales opposées deux lamages différenciés pour s'adapter à deux standards différents d' épaulement d'arbre d'entraînement.According to a preferred embodiment of the invention, the adapter ring has on its opposite end faces two differentiated counterbores to adapt to two different standards of drive shaft shoulder.
Le dispositif de fixation est alors réversible et permet de s'adapter sensiblement à 90 % des arbres d'entraînement trouvés sur le marché au moyen d'une pièce unique, ce qui permet de réduire considérablement les stocks.The fixing device is then reversible and makes it possible to adapt substantially to 90% of the drive shafts found on the market by means of a single part, which makes it possible to considerably reduce stocks.
L'invention a encore pour objet une tête porte-fils de débroussailleuse apte à être montée par 1 ' intermédiaire du dispositif de fixation sur un arbre moteur d'entraînement de la tête, caractérisée en ce qu'elle comporte un moyeu logeant le dispositif de fixation.The subject of the invention is also a wire-brush cutter head capable of being mounted by means of the fixing device on a motor shaft driving the head, characterized in that it comprises a hub housing the device fixation.
L'invention sera bien comprise à la lecture de la description suivante d'un exemple de réalisation, en référence aux dessins annexés dans lesquels :The invention will be clearly understood on reading the following description of an exemplary embodiment, with reference to the accompanying drawings in which:
la figure 1 est une vue schématique éclatée d'un bloc- moteur de débrouissailleuse à sortie mâle ;Figure 1 is an exploded schematic view of a block brushcutter motor with male output;
la figure 2 est analogue à la figure 1, pour un bloc- moteur à sortie femelle ;FIG. 2 is similar to FIG. 1, for an engine block with female output;
la figure 3 représente une vue schématique d'un dispositif conforme à l'invention destiné à être fixé sur un arbre moteur rotatif de type à sortie mâle ou de type à sortie femelle ;FIG. 3 represents a schematic view of a device according to the invention intended to be fixed on a rotary motor shaft of the male outlet type or of the female outlet type;
la figure 4 représente un dispositif de fixation à l'état assemblé à l'arbre et à la tête porte-fils ;FIG. 4 represents an attachment device in the assembled state to the shaft and to the wire-carrying head;
la figure 5 représente une vue de face de la bague d'adaptation du dispositif de fixation etFIG. 5 represents a front view of the adapter ring of the fixing device and
la figure 6 représente une vue de dessous de la bague de la figure 3.FIG. 6 represents a bottom view of the ring of FIG. 3.
Le dispositif, objet de l'invention, est destiné à permettre la fixation d'une tête 1 porte-fils de débroussailleuse, encore appelée tête Nylon, à l'arbre 2 moteur rotatif d'entraînement d'une telle tête 1. Comme mentionné ci-dessus, l'arbre 2 moteur rotatif d'entraînement d'une débroussailleuse est muni, à ou au voisinage de son extrémité, d'un épaulement 3 standard pour une plage de diamètres de l'arbre 2. Ainsi, généralement, pour un épaulement 3 standard d'un diamètre de 20 mm, le diamètre de l'arbre pourra varier entre 8 et 10 mm. Dans le cas d'un épaulement 3 standard de 25,4 mm, le diamètre de l'arbre pourra quant à lui varier de 10 à 17 mm. Les dimensions 20 mm et 25,4 mm sont les dimensions d' épaulement 3 standard les plus répandues sur le marché. Le dispositif, objet de l'invention, se caractérise par l'utilisation de cet épaulement standard pour permettre la fixation de la tête 1 porte-fils à l'arbre 2 de débroussailleuse . Le dispositif selon 1 ' invention est constitué principalement d'une bague 4 d'adaptation, généralement métallique, munie d'une part, sur au moins l'une de ses faces frontales, d'un lamage représenté en 5A, 5B et dimensionné pour coiffer par embrèvement l' épaulement 3 standard de l'arbre 2 rotatif, d'autre part de moyens d'accouplement à une tête 1 porte-fils pour solidariser en rotation tête 1 porte-fils, bague 4 et arbre 2.The device, object of the invention, is intended to allow the attachment of a head 1 brushcutter son holder, also called nylon head, to the shaft 2 rotary motor for driving such a head 1. As mentioned above, the shaft 2 rotary motor driving a brushcutter is provided, at or near its end, with a standard shoulder 3 for a range of diameters of the shaft 2. Thus, generally, for a standard shoulder 3 with a diameter of 20 mm, the diameter of the shaft may vary between 8 and 10 mm. In the case of a standard shoulder 3 of 25.4 mm, the diameter of the shaft may vary from 10 to 17 mm. The dimensions 20 mm and 25.4 mm are the most common standard shoulder dimensions 3 on the market. The device, object of the invention, is characterized by the use of this standard shoulder to allow the attachment of the head 1 wire holder to the shaft 2 of brushcutter. The device according to the invention mainly consists of an adapter ring 4, generally metallic, provided on the one hand, on at least one of its front faces, with a countersink shown in 5A, 5B and dimensioned for covering the standard shoulder 3 of the rotary shaft 2 by swaging, on the other hand means for coupling to a head 1 wire holder to secure in rotation head 1 wire holder, ring 4 and shaft 2.
Dans un mode de réalisation préféré de l'invention conforme aux figures, cette bague 4 d'adaptation comporte sur ses faces frontales opposées un lamage 5A, 5B différencié pour s'adapter aux deux principaux standards d' épaulement 3 d'arbre 2 d'entraînement trouvés sur le marché. Ainsi, l'un des lamages présentera un diamètre voisin de 20 mm tandis que l'autre lamage présentera un diamètre voisin de 25,4 mm. L'un ou l'autre des lamages de cette bague est donc dimensionné pour venir coiffer 1 ' épaulement standard de l'arbre rotatif. La bague est alors maintenue dans cette position en contact d'appui non glissant sous l'effet d'un effort de compression axial.In a preferred embodiment of the invention in accordance with the figures, this adapter ring 4 has on its opposite end faces a counterbore 5A, 5B differentiated to adapt to the two main standards of shoulder 3 of shaft 2 of drive found in the market. Thus, one of the counterbores will have a diameter close to 20 mm while the other counterbore will have a diameter close to 25.4 mm. One or other of the countersinks of this ring is therefore dimensioned to come over the standard shoulder of the rotary shaft. The ring is then held in this position in non-sliding bearing contact under the effect of an axial compression force.
Dans les exemples de réalisation représentés, l'effort de compression axial à appliquer pour maintenir 1 ' épaulement standard de l'arbre 2 contre le fond du lamage 5A, 5B et permettre une solidarisation entre bague 4 d'adaptation et arbre 2 moteur est obtenu par l'intermédiaire de la visserie d'origine équipant la sortie de l'arbre 2 moteur. Ainsi, comme le montre la figure 1, en fonction du type de sortie mâle ou femelle de l'arbre, cette visserie peut être constituée d'une rondelle 8 et d'un écrou 9B pour une sortie mâle (figure 1) ou d'une rondelle 8 et d'une vis 9A (figure 2) dans le cas d'une sortie d'arbre femelle. Cette visserie sera utilisée pour maintenir la bague 4 en application contre l' épaulement 3.In the embodiments shown, the axial compression force to be applied to maintain the standard shoulder of the shaft 2 against the counterbore of the counterbore 5A, 5B and allow a connection between the adapter ring 4 and the motor shaft 2 is obtained by means of the original hardware fitted to the output of the motor shaft 2. Thus, as shown in Figure 1, depending on the type of male or female output of the shaft, this hardware can consist of a washer 8 and a nut 9B for a male output (Figure 1) or a washer 8 and a screw 9A (Figure 2) in the case of a female shaft outlet. These screws will be used to hold the ring 4 in application against the shoulder 3.
Une fois cette fixation réalisée, il convient alors de solidariser la tête 2 porte-fils à ladite bague. Pour ce faire, les moyens d'accouplement entre tête 1 porte-fils et bague 4 sont constitués par exemple d'un filetage 6 périphérique de la bague 4 coopérant avec un taraudage 7 épaulé ménagé dans la tête 1 porte-fils. Dans ce cas, la fixation de la tête 2 porte-fils à la bague 4 d'adaptation se fait simplement par vissage. Bien évidemment, le pas de ce filetage périphérique 6 sera choisi en fonction du sens de rotation de l'arbre de débroussailleuse. Aujourd'hui, 90Once this attachment has been made, it is then necessary to secure the head 2 wire holder to said ring. For this to do, the coupling means between head 1 wire holder and ring 4 consist for example of a peripheral thread 6 of the ring 4 cooperating with a shouldered thread 7 formed in the head 1 wire holder. In this case, the attachment of the head 2 wire holder to the adapter ring 4 is done simply by screwing. Obviously, the pitch of this peripheral thread 6 will be chosen according to the direction of rotation of the brushcutter shaft. Today 90
% des arbres de débroussailleuse sont entraînés en rotation vers la gauche. En conséquence, le filetage sera de préférence fileté à gauche pour éviter un dévissage intempestif de la tête porte-fils lors de l'entraînement en rotation de l'arbre 2 moteur rotatif. La possibilité d'utiliser la visserie d'origine fournie avec l'arbre 2 moteur permet de limiter au maximum le nombre de pièces à fournir pour permettre la fixation de la tête 1 porte-fils à l'arbre 2 moteur. Lorsque le lamage 5A de plus petit diamètre doit être utilisé pour coopérer avec 1 ' épaulement 3 standard de l'arbre 2 moteur rotatif, il peut être prévu, pour la bague 4 d'adaptation, une rondelle de compensation, non représentée, présentant un diamètre du lamage 5B de plus grand diamètre de la bague 4 pour réduire éventuellement le jeu entre visserie et bague 4 d'adaptation. Dans ce cas, le dispositif de fixation est constitué d'une part de la bague 4 d'adaptation, d'autre part d'une rondelle de compensation.% of the brushcutter shafts are rotated to the left. Consequently, the thread will preferably be threaded to the left to avoid untimely unscrewing of the thread-carrying head during the rotary drive of the shaft 2 of the rotary motor. The possibility of using the original screws and bolts supplied with the 2-motor shaft makes it possible to limit the number of parts to be supplied as much as possible to allow the head 1 wire holder to be fixed to the 2-motor shaft. When the counterbore 5A of smaller diameter must be used to cooperate with the standard shoulder 3 of the shaft 2 of the rotary motor, provision may be made for the adapter ring 4, a compensation washer, not shown, having a diameter of the counterbore 5B of larger diameter of the ring 4 to possibly reduce the clearance between screws and ring 4 of adaptation. In this case, the fixing device consists on the one hand of the adapter ring 4, on the other hand of a compensation washer.
Un tel dispositif de fixation peut être vendu seul ou commercialisé avec une tête 1 porte-fils de débroussailleuse. Dans ce cas, en raison de sa conception, il n'augmentera en rien l'encombrement d'une telle tête lors de son stockage. En effet, la tête 1 porte-fils de débroussailleuse, apte à être montée par l'intermédiaire du dispositif de fixation précité, comporte un moyeu 10 logeant le dispositif de fixation. Il est à noter que ce dispositif de fixation pourra être logé dans le moyeu 10 à l'état monté de la tête porte-fils sur l'arbre ou à l'état démonté de cette dernière. Ce moyeu 10 est taraudé au voisinage de son extrémité libre pour être fixé par vissage au dispositif de fixation. Le taraudage est représenté en 7 aux figures. Un épaulement 14 logé dans le moyeu 10 est utilisé comme butée de fin de course lors de ce vissage. Toutefois, d'autres modes de réalisation des moyens d'accouplement auraient pu être envisagés.Such a fixing device can be sold alone or sold with a head 1 brushcutter son holder. In this case, due to its design, it will in no way increase the size of such a head during its storage. In fact, the head 1 of the brushcutter son holder, capable of being mounted by means of the aforementioned fixing device, comprises a hub 10 housing the fixing device. It should be noted that this fixing device can be housed in the hub 10 in the assembled state of the wire-carrying head on the shaft or in the disassembled state of the latter. This hub 10 is tapped at near its free end to be fixed by screwing to the fixing device. The thread is shown in 7 in the figures. A shoulder 14 housed in the hub 10 is used as a limit stop during this screwing. However, other embodiments of the coupling means could have been envisaged.
Ce moyeu 10 est en outre prolongé radialement par une couronne 11 porte-fils tronconique . Les orifices 12 de passage des fils de coupe sont ménagés au voisinage de la plus grande circonférence de la couronne 11. La paroi de la grande base de la couronne 11 porte-fils est quant à elle réalisée concave. Chaque orifice 12 de passage des fils de coupe depuis la base concave de la couronne rejoint le plan conique incliné de la couronne à 45° en formant avec le côté supérieur de celui-ci un angle de 75° et y débouche par son orifice inférieur. Les orifices 12 de passage des fils de coupe peuvent être de diamètres différents pour permettre le passage de fils de diamètres différents.This hub 10 is further extended radially by a crown 11 frustoconical son holder. The orifices 12 for the passage of the cutting wires are formed in the vicinity of the largest circumference of the crown 11. The wall of the large base of the son-carrying crown 11 is in turn made concave. Each orifice 12 for the passage of the cutting wires from the concave base of the crown joins the inclined conical plane of the crown at 45 ° by forming an angle of 75 ° with the upper side thereof and opens out there through its lower orifice. The orifices 12 for the passage of the cutting wires can be of different diameters to allow the passage of wires of different diameters.
Ainsi, l'utilisateur pourra sélectionner les paires d'orifices en fonction de la section des fils. Il positionnera généralement les fils dans des orifices disposés diamétralement opposés. Les fils sont prédécoupés à une longueur correspondant aux normes de sécurité des carters de protection des débroussailleuses. Le positionnement des fils sur la tête de débroussailleuse ne nécessite aucun outillage. La mise en service est très rapide. Chaque fil peut être introduit dans un trou du côté de la face inférieure conique de la couronne et sortir par ce même trou du côté de la face supérieure incurvée de la couronne. Le fil est ensuite plié en deux en forme de cavalier et réintroduit dans un trou voisin de même diamètre du côté de la face supérieure incurvée de la couronne pour ressortir par ce même trou du côté de la face inférieure conique de la couronne. Un tel positionnement des fils offre l'avantage de 1 ' auto-serrage des fils de coupe en rotation d'une part par la force centrifuge qui redresse et tend les fils en position horizontale et d'autre part par les sorties de trou qui offrent des angles d'arrêt à la courbure des fils positionnés en cavalier sur une paire de trous et exercent une contrainte au bouclage de ces mêmes fils. Le sommet de la couronne 11 est muni d'une butée 13 d'appui au sol libre en rotation. La face de contact d'appui au sol de cette butée 13 affecte une forme hémisphérique. Grâce à ce montage libre en rotation, il est possible de poser la tête 1 porte-fils en appui au sol en situation de travail en toute stabilité quelle que soit la nature du terrain. Thus, the user will be able to select the pairs of orifices according to the section of the wires. It will generally position the wires in diametrically opposite orifices. The wires are precut to a length corresponding to the safety standards of the brushcutter protection casings. The positioning of the wires on the brushcutter head does not require any tools. Commissioning is very quick. Each wire can be introduced into a hole on the side of the conical underside of the crown and exit through this same hole on the side of the curved upper face of the crown. The wire is then folded in two in the form of a jumper and reintroduced into a neighboring hole of the same diameter on the side of the curved upper face of the crown to emerge through this same hole on the side of the conical lower face of the crown. Such a positioning of the wires offers the advantage of self-tightening of the rotating cutting wires on the one hand by the centrifugal force which straightens and stretches the wires in a horizontal position and, on the other hand, through the hole outlets which provide stopping angles to the curvature of the wires positioned in a jumper over a pair of holes and exert a constraint on looping these same wires. The top of the crown 11 is provided with a stop 13 for supporting the ground which is free to rotate. The contact face of the ground support of this stop 13 has a hemispherical shape. Thanks to this free mounting in rotation, it is possible to put the head 1 wire holder in support on the ground in working situation in any stability whatever the nature of the ground.

Claims

REVENDICATIONS
1. Dispositif pour la fixation d'une tête (1) porte-fils de débroussailleuse à l'arbre (2) moteur rotatif d'entraînement d'une telle tête (1), cet arbre (2) étant muni à ou au voisinage de son extrémité d'un épaulement (3) standard pour une plage de diamètres de l'arbre (2), caractérisé en ce que le dispositif est constitué principalement d'une bague (4) d'adaptation munie d'une part, sur au moins l'une de ses faces frontales, d'un lamage (5A, 5B) dimensionné pour coiffer par embrèvement 1' épaulement (3) standard de l'arbre (2) rotatif et être maintenu en contact d'appui non glissant sous l'effet d'un effort de compression axial, d'autre part de moyens d'accouplement à une tête (1) porte-fils pour solidariser en rotation tête (1) porte-fils, bague (4) et arbre (2).1. Device for attaching a head (1) of a brushcutter wire holder to the shaft (2) rotary motor for driving such a head (1), this shaft (2) being provided at or in the vicinity from its end with a standard shoulder (3) for a range of diameters of the shaft (2), characterized in that the device consists mainly of an adapter ring (4) provided on the one hand, on at least one of its front faces, of a counterbore (5A, 5B) dimensioned to cover by abutment the standard shoulder (3) of the rotary shaft (2) and be maintained in non-sliding bearing contact under the effect of an axial compression force, on the other hand of means for coupling to a head (1) wire holder to secure in rotation head (1) wire holder, ring (4) and shaft (2) .
2. Dispositif selon la revendication 1, caractérisé en ce que la bague (4) d'adaptation comporte sur ses faces frontales opposées des lamages (5A, 5B) différencié pour s'adapter à deux standards différents d' épaulement (3) d'arbre (2) d'entraînement.2. Device according to claim 1, characterized in that the adapter ring (4) has on its opposite end faces laminations (5A, 5B) differentiated to adapt to two different standards of shoulder (3) of drive shaft (2).
3. Dispositif selon l'une des revendications 1 et 2 , caractérisé en ce que les moyens d'accouplement entre tête (1) porte-fils et bague (4) sont constitués d'un filetage (6) périphérique de la bague (4) coopérant avec un taraudage (7) épaulé ménagé dans la tête (1) porte-fils.3. Device according to one of claims 1 and 2, characterized in that the coupling means between head (1) wire holder and ring (4) consist of a thread (6) peripheral of the ring (4 ) cooperating with a shouldered thread (7) formed in the head (1) wire holder.
4. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que 1 ' effort de compression axial pour la solidarisation entre bague (4) d'adaptation et arbre (2) moteur est obtenu par l'intermédiaire de la visserie (8, 9A ; 8, 9B) d'origine équipant la sortie de l'arbre (2) moteur.4. Device according to one of claims 1 to 4, characterized in that 1 axial compression force for the joining between ring (4) of adaptation and shaft (2) motor is obtained by means of the screws ( 8, 9A; 8, 9B) of origin fitted to the output of the motor shaft (2).
5. Dispositif selon la revendication 4, caractérisé en ce qu'il est prévu pour la bague (4) d'adaptation une rondelle de compensation de diamètre du lamage (5B) de plus grand diamètre pour réduire éventuellement le jeu entre visserie (8, 9A ; 8, 9B) et bague ( 4 ) d ' adaptation.5. Device according to claim 4, characterized in that it is provided for the ring (4) of adaptation a washer for compensating the diameter of the counterbore (5B) of larger diameter in order to possibly reduce the play between screws (8, 9A; 8, 9B) and ring (4) for adaptation.
6. Tête (1) porte-fils de débroussailleuse apte à être montée par l'intermédiaire du dispositif de fixation conforme à l'une quelconques des revendications 1 à 5 sur un arbre (2) moteur d'entraînement de la tête, caractérisée en ce qu'elle comporte un moyeu (10) logeant le dispositif de fixation.6. Head (1) brushcutter son carrier capable of being mounted by means of the fixing device according to any one of claims 1 to 5 on a shaft (2) motor driving the head, characterized in that it comprises a hub (10) housing the fixing device.
7. Tête (1) porte-fils de débroussailleuse selon la revendication 6 , caractérisée en ce gue le moyeu (10) est taraudé au voisinage de son extrémité libre pour être fixé par vissage au dispositif de fixation.7. Head (1) brushcutter son holder according to claim 6, characterized in that the hub (10) is tapped near its free end to be fixed by screwing to the fixing device.
8. Tête selon l'une des revendications 6 et 7 , caractérisée en ce que le moyeu (10) est prolongé radiale ent par une couronne (11) porte-fils tronconique, les orifices (12) de passage des fils de coupe étant ménagés au voisinage de la plus grande circonférence de la couronne ( 11) .8. Head according to one of claims 6 and 7, characterized in that the hub (10) is extended radially ent by a crown (11) frustoconical son holder, the orifices (12) for passage of the cutting son being formed in the vicinity of the largest circumference of the crown (11).
9. Tête selon la revendication 8, caractérisée en ce que la paroi de la grande base de la couronne (11) porte-fils est réalisée concave.9. Head according to claim 8, characterized in that the wall of the large base of the crown (11) son holder is made concave.
10. Tête selon l'une des revendications 8 et 9 , caractérisée en ce que le sommet de la couronne (11) est muni d'une butée (13) d'appui au sol libre en rotation.10. Head according to one of claims 8 and 9, characterized in that the top of the crown (11) is provided with a stop (13) supporting the ground free in rotation.
11. Tête selon la revendication 10, caractérisée en ce que la face de contact d'appui au sol de la butée (13) affecte une forme hémisphérique. 11. Head according to claim 10, characterized in that the contact face for bearing on the ground of the stop (13) has a hemispherical shape.
PCT/FR2000/001482 1999-06-01 2000-05-30 Device for fixing a hedge-trimmer wire-holder head to the rotary clutch shaft driving such a head WO2000072657A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU52285/00A AU5228500A (en) 1999-06-01 2000-05-30 Device for fixing a hedge-trimmer wire-holder head to the rotary clutch shaft driving such a head

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR99/07300 1999-06-01
FR9907300A FR2794337A1 (en) 1999-06-01 1999-06-01 Attachment for fixing hedge-trimmer wire-holder head to rotary clutch shaft driving head is ensured by washer and nut for male output, and by washer and screw for female output
FR99/13958 1999-09-30
FR9913958 1999-09-30

Publications (1)

Publication Number Publication Date
WO2000072657A1 true WO2000072657A1 (en) 2000-12-07

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Application Number Title Priority Date Filing Date
PCT/FR2000/001482 WO2000072657A1 (en) 1999-06-01 2000-05-30 Device for fixing a hedge-trimmer wire-holder head to the rotary clutch shaft driving such a head

Country Status (2)

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AU (1) AU5228500A (en)
WO (1) WO2000072657A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479277A1 (en) * 2003-05-20 2004-11-24 Donald Joe Sullivan Weed eater adapter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998008372A1 (en) * 1996-08-28 1998-03-05 Mounce Jeffrey B An adapter kit for a rotary trimmer attachment
US5836227A (en) * 1995-03-31 1998-11-17 Dees, Jr.; John M. Weed cutter head

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5836227A (en) * 1995-03-31 1998-11-17 Dees, Jr.; John M. Weed cutter head
WO1998008372A1 (en) * 1996-08-28 1998-03-05 Mounce Jeffrey B An adapter kit for a rotary trimmer attachment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1479277A1 (en) * 2003-05-20 2004-11-24 Donald Joe Sullivan Weed eater adapter

Also Published As

Publication number Publication date
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