ITGE960062A1

ITGE960062A1 - ANTI-WRAPPING DEVICE FOR GRASS-CUTTER OR SIMILAR.

Info

Publication number: ITGE960062A1
Application number: IT96GE000062A
Authority: IT
Inventors: Renato Damonte
Original assignee: Renato Damonte
Priority date: 1996-07-03
Filing date: 1996-07-03
Publication date: 1998-01-03
Also published as: ITGE960062A0; IT1287796B1

Description

DESCRIZIONE DESCRIPTION

Invenzione industriale dal titolo: DISPOSITIVO ANTIAWOLGIMENTO PER TAGLIAERBA O SIMILI, Industrial invention entitled: ANTI-WINDING DEVICE FOR LAWN MOWERS OR SIMILAR,

Il dispositivo in oggetto (1) e (la) e' un accessorio montato in combinazione con dispositivi tagliaerba come un decespugliatore o simili. The device in question (1) and (la) is an accessory mounted in combination with lawnmower devices such as a brush cutter or the like.

Detto dispositivo e’ a forma di cupola o piatto capovolto, preferibilmente di metallo, atto a proteggere l'utensile tagliaerba, sia esso a lame (11) e (Ile) o a filo (10) e (10a) , dal frequente aggrovigliarsi dell'erba attorno ad esso. Said device has the shape of an overturned dome or plate, preferably made of metal, designed to protect the lawnmower tool, be it with blades (11) and (11le) or flush (10) and (10a), from the frequent tangling of the grass around it.

Questo problema provoca il rallentamento dell'utensile tagliaerba con conseguente maggior consumo di energia ed aumento dello sforzo meccanico o il bloccaggio completo dello stesso per cui l'operatore e' costretto ad interrompere il lavoro, sganciare il decespugliatore dalla tracolla di sostegno e liberare l'utensile. La tecnica adottata e' quella di impedire all’erba di avvinghiarsi al perno centrale (9) che trasmette il movimento rotatorio all'utensile, mantenendola distante; il di spo si ti vo antiavvolgimento per fare ciò' e' posto sopra a coprire l'utensile tagliaerba ed intorno al perno stesso. This problem causes the lawnmower tool to slow down with consequent greater energy consumption and increased mechanical effort or its complete locking so that the operator is forced to interrupt the work, unhook the brushcutter from the support shoulder strap and free the tool. The technique adopted is to prevent the grass from clinging to the central pin (9) which transmits the rotary movement to the tool, keeping it at a distance; the anti-winding shifter to do this is placed on top of the lawn mower tool and around the pin itself.

Il dispositivo antiavvolgimento essendo fissato alla scatola ingranaggi di trasmissione (8) cioè' alla parte fissa della macchina, non consente all'erba di raggiungere il centro della rotazione poiché' non viene piu' catturata dalla forza centripeta dell'utensile tagliaerba (10) e (11). Since the anti-winding device is fixed to the transmission gear box (8), that is to the fixed part of the machine, it does not allow the grass to reach the center of rotation since it is no longer captured by the centripetal force of the lawnmower tool (10) and (11).

Aspetti migliorativi secondari ma ugualmente importanti introdotti dal dispositivo antiavvolgimento sono: Secondary but equally important improvement aspects introduced by the anti-winding device are:

-la protezione dell'utensile tagliaerba a filo (10) dagli urti provenienti dall'alto e lateralmente che causano spesso la tranciatura del filo in prossimità' del foro di uscita ( 12), essendo questo il suo punto di maggiore sforzo poiché' meno flessibile; in tal caso per proseguire il lavoro e' necessario aprire il disco portafilo per recuperare la cima tagliata. -protection of the wire lawn mower tool (10) from impacts from above and from the side which often cause the wire to be sheared in proximity to the outlet hole (12), this being its point of greatest effort since it is less flexible ; in this case to continue the work it is necessary to open the thread-holder disk to recover the cut line.

-Il dispositivo antiavvolgimento sopratutto se di metallo, serve anche come dissipatore del calore prodotto dagli ingranaggi dello snodo angolare di trasmissione (contenuti nella scatola ingranaggi)(8), una delle parti del decespugliatore sottoposte a maggiore sforzo. -The anti-winding device, especially if made of metal, also serves as a dissipator of the heat produced by the gears of the transmission angular joint (contained in the gearbox) (8), one of the parts of the brushcutter subjected to greater stress.

Una forma esecutiva del dispositivo antiavvolgimento e' illustrata a titolo di esempio non limitativo nelle figure allegate in cui: • La Fig. 1 illustra con vista laterale il particolare di montaggio dei principali componenti la testa tagliaerba con l'utensile a filo comprendente: la parte terminale del gambo (21) del decespugliatore , la scatola ingranaggi (8), il dispositivo antiavvolgimento (1) con relative viterie (5), il disco portafilo (10) , il filo tagliaerba (22) . An embodiment of the anti-winding device is illustrated by way of non-limiting example in the attached figures in which: end of the stem (21) of the brushcutter, the gearbox (8), the anti-winding device (1) with relative screws (5), the line holder disk (10), the lawnmower blade (22).

Vengono inoltre evidenziate: The following are also highlighted:

la distanza (15) tra il dispositivo antiavvolgimento ed il disco portafilo, la protezione garantita dal dispositivo antiavvolgimento del bordo dell'utensile (16) e del punto piu' critico del filo tagliaerba (12) . the distance (15) between the anti-winding device and the line disk, the protection guaranteed by the anti-winding device of the edge of the tool (16) and the most critical point of the lawnmower blade (12).

• La Fig. 2 illustra l'esploso della Fig. 1 ed in particolare: • Fig. 2 illustrates the exploded view of Fig. 1 and in particular:

- la scatola ingranaggi (8a) con gli appositi supporti (4) per il fissaggio del dispositivo antiavvolgimento e le relative viterie (5a), - the gear box (8a) with the special supports (4) for fixing the anti-winding device and the relative screws (5a),

- il dispositivo antiavvolgimento (la) in unico pezzo di forma concava, montato rivolto verso l'utensile di taglio con foro centrale (7) per il passaggio del perno (9) , i relativi fori di fissaggio (4a) ed il foro laterale (2) usato per poter accedere a bloccare il perno centrale (9) quando viene fissato l'utensile . - il distanziatore (6) (con foro (6a) per bloccaggio perno centrale) atto a garantire la distanza (15) di Fig .1 tra il dispositivo antiavvolgimento ed l'utensile tagliaerba per consentirne la sua libera rotazione. - the anti-winding device (la) in a single concave piece, mounted facing the cutting tool with a central hole (7) for the passage of the pin (9), the relative fixing holes (4a) and the side hole ( 2) used to access and lock the central pin (9) when the tool is fixed. - the spacer (6) (with hole (6a) for locking the central pin) designed to ensure the distance (15) of Fig .1 between the anti-winding device and the lawnmower tool to allow its free rotation.

- il disco portafilo (IOa) col filo tagliaerba (22a) e relativo dado di fissaggio (23). - the trimmer disc (10a) with the lawnmower blade (22a) and relative fixing nut (23).

• La Fig. 3 illustra con vista laterale il particolare dì montaggio dei principali componenti la testa tagliaerba come in Fig. 1 ma con l'utensile a lame (11) ed il dispositivo antiavvolgimento in versione apribile (17), con le staffe di fissaggio (18). • Fig. 3 shows a side view of the assembly detail of the main components of the lawnmower head as in Fig. 1 but with the blade tool (11) and the anti-winding device in the openable version (17), with the fixing brackets (18).

Viene anche evidenziata la distanza (14) tra il dispositivo antiavvolgimento ed il disco tagliaerba, e le lame (13) all'esterno del dispositivo antiavvolgimento. The distance (14) between the anti-winding device and the grass cutting disc, and the blades (13) outside the anti-winding device is also highlighted.

• La Fig. 4 illustra l'esploso della Fig. 3 ed in particolare: • Fig. 4 illustrates the exploded view of Fig. 3 and in particular:

-il dispositivo antiavvolgimento in versione apribile (17c) con bordo (20c) e pareti adiacenti (19c) ad incastro e generiche staffe (18c) o simili a molla o con viterie che garantiscono il bloccaggio delle due parti, il distanziatore (6c) usato in posizione capovolta rispetto alla Fig. 2, e la campana di protezione (25). - the anti-winding device in the opening version (17c) with interlocking edge (20c) and adjacent walls (19c) and generic brackets (18c) or similar with spring or screws that guarantee the locking of the two parts, the spacer (6c) used in an inverted position with respect to Fig. 2, and the protection bell (25).

Claims

CLAIMS (1) Anti-winding device mounted in combination with lawnmower devices such as brushcutters or the like characterized in that it comprises: a circular element in the shape of an inverted dome or plate (1) and (la) preferably of metal such as light alloy or aluminum or of rigid and resistant plastic material with a central hole (7); (2) • Accessory for brushcutter or the like as per claim 1, characterized in that: the anti-winding device is equipped with three or more preferably threaded holes (4a) for fixing the deck to the brushcutter frame; (3) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the anti-winding device has a side hole (2) used to access and lock the pin (9) when the lawnmower tool is fixed; (4) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the outer edge at the base of the anti-winding device (2 4) can have a reinforcing ring to make it more resistant to impacts ; (5) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the anti-winding device is fixed with screws (5) or similar to the appropriate supports (4) on the gear box (8); (6) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the anti-winding device completely covers the upper part of the trimmer tool (10) reaching beyond its outer edge (16) in in this way it protects the wire (22) from impacts coming from above and laterally which often cause it to be sheared in proximity to the outlet hole (12), this being the point of greatest stress since it is less flexible; (7) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the anti-winding device covers the upper part of the blade tool (11) leaving the blades (13) and a part of the disk free itself (depending on the size of the blades); (8) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the anti-winding device must not come into contact with the grass cutting tool but remain at a sufficient distance (14) and (15) to guarantee its free rotation; (9) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized by the fact that: given the different thickness of the blade lawn mower tool (11) from the wire one (10), to ensure sufficient distance ( 14) and (15) between this and the anti-winding device there is a spacer flange (6) of different thickness according to its working side, with side hole (6a) for locking the rotating pin (9); (10) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized by the fact that: although there is a good tolerance between the different dimensions of the anti-winding device with respect to the grass cutting tool, anti-winding devices of different widths are in any case provided and height to always guarantee a proportionate coverage for all lawn mowing tools on the market; (11) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the anti-winding device to be used as a good heat sink must be made of metal or the like. (12) • Accessory for brushcutter or similar according to one or more of the preceding claims, characterized by the fact that: an OPENABLE version of the anti-winding device (17) and (17c) allows its insertion without the prior disassembly of the lawnmower tool; (13) • Accessory for brushcutter or the like according to one or more of the preceding claims, characterized in that: the two or more parts of the opening anti-winding device are preferably provided with joints (19c) and (20c) and brackets (18c) or similar with screws or springs to ensure the necessary rigidity and strength.