[0001] The invention relates to a carburettor operating mechanism with intermediate cable
as defined in claim 1.
[0002] The carburettor is a device which mixes atmospheric air with liquid fuels, so as
to make them combustible or explosive.
[0003] Said mixing is performed in the combustion chamber and depending on the amount of
air introduced, the motorcycle will increase the revolutions of the pistons and thereby
increase speed.
[0004] In motorcycles and mopeds, the traditional carburettor has a guillotine valve in
the entrance conduct to the mixture which regulates the amount of air supplied.
[0005] This guillotine valve has a piston which is attached to the accelerator cable of
the motorcycle, and in order to access it the cover of the carburettor must be unscrewed
from the top.
[0006] There is a restoring spring between the cover and the cylinder.
[0007] In order to accelerate the motorcycle, the cable is pulled by the motorcycle grip.
Then the guillotine cylinder is raised, allowing a greater flow of air to enter.
[0008] Nowadays, motorcycle manufacturers do not make carburettors for financial reasons,
and these are bought from specialised manufacturers.
[0009] Said carburettors are furnished by these manufacturers without a cable for storage
reasons, since each motorcycle model has a different cable, and for packaging reasons,
as the cable is very long and bending or rolling it is quite difficult and may damage
it.
[0010] For the above reasons, the motorcycle and moped manufacturer nowadays is forced to
mount the cable on the carburettor supplied, this being a complex operation and not
mechanizable, for which reason the company must have a person occupied in said function.
[0011] The operation consists of opening the top of the carburettor, removing the admission
cylinder, disassembling the elastic ring and spring, inserting the cable, reassembling
the elastic ring and spring, introducing the cylinder with the end of the cable now
attached to it and finally replacing the carburettor cover.
[0012] This operation is quite tedious and nowadays means a longer production time.
[0013] A solution would lie in carburettors being provided with an element simplifying the
insertion of the accelerator cable.
[0014] DE-A-3317382 discloses a Bowden cable suitable for use with carburettors, including
a fixed end screw. DE-A-2548545 discloses a Bowden cable provided with a plastic coating
on the core wire, for the purpose of lowering the friction.
[0015] The intermediate accelerator cable is basically placed inside a bent or straight
support tube with a protective antifriction plastic coating placed between them.
[0016] This plastic covering reduces friction of the cable against the metallic tubular
element, thus increasing its lifespan.
[0017] On one end, the cable has a connection head which is attached to the guillotine cylinder
of the carburettor.
[0018] The other end is formed by a female connection to the normal accelerator cable.
[0019] In the far end of the support tube is placed a fixed screw to be joined to a tensioner
or a sliding cover with a screw.
[0020] The traditional accelerator cable has an elastic ring of the sliding cover in its
extremity, also having the typical male head which fits perfectly into the female
connection of the intermediate cable.
[0021] In order to connect both heads, male and female, all that needs to be done is to
move the sliding cover which will in turn move the main cable guide so that one may
take out the male head and introduce it in the female orifice.
[0022] Once both cables are joined, the sliding cover is screwed to the fixed screw of the
support tube, the entire set being fixed and both connection heads joined.
[0023] The main advantage of this innovative cable for motorcycles and mopeds lies in the
savings derived from not having to disassemble the carburettor since it shall arrive
from the factory with the support tube which incorporates the intermediate accelerator
cable.
[0024] That is, to this day the factory receiving the carburettor had to hire an employee
to uncover the carburettor and connect the adequate accelerator cable for the type
of motorcycle or moped.
[0025] After incorporation of the innovative intermediate cable, the carburettor received
by the motorcycle factory shall have this standard cable inside the support tube already
installed, and all to be done is connect the male and female heads.
DESCRIPTION OF THE DRAWINGS
[0026] With the aim of illustrating all that has been said above, drawings are attached,
where in a simple and schematic way is shown a purely illustrative and non-limiting
example embodiment of the practical possibilities of the invention.
[0027] In said drawings, Figure 1 shows a disassembled view in cross section of the new
cable for motorcycles and mopeds with the bent option.
[0028] Figure 2 corresponds to an assembled view of the cable for motorcycles and mopeds.
[0029] Figure 3 corresponds to a cross section view of the antifriction cover and the intermediate
cable.
DESCRIPTION OF A PRACTICAL CASE
[0030] The new mechanism is characterised in that said intermediate cable (1) is placed
inside a metallic support tube (4) which may be bent or straight, inserting between
them an antifriction plastic coating (5).
[0031] On one end cable (1) is composed of a connection head (2) which is attached to the
guillotine cylinder of the carburettor.
[0032] Its other end is composed of a female connection terminal (3) for the traditional
accelerator cable.
[0033] The end of the metal tube support (4) is provided with a fixed screw (6) for union
to a tensioner or sliding cover (7).
[0034] The traditional accelerator cable shall have an elastic ring (8) of the sliding cover
(7) on its end, also having the traditional male head (9) which fits perfectly into
the female connection terminal of the intermediate cable.
1. Carburettor operating mechanism with intermediate cable, of the type used in motorcycles
and mopeds, wherein said intermediate cable (1) has, at a lower end, a connection
head (2) which is attached to the carburettor cylinder, and, at an opposite end, a
female terminal (3) connected to an accelerator cable, said intermediate cable (1)
being encased in a metal or plastic support tube (4), said support tube being bent
or straight and provided with a fixed end screw (6) for connection to a tensioner
or sliding cover (7) and with a plastic coating (5) protecting the intermediate cable
(1), said plastic coating being placed between said intermediate cable (1) and the
support tube (4), the accelerator cable, which is arranged to be directly connected
to an accelerator lever, being provided with a male head (9) for connection to the
female terminal (3) of the intermediate cable (1), said accelerator cable further
being provided, at its end, with an elastic ring (8) of the sliding cover (7).
1. Vergaserbetriebsmechanismus mit einem Verbindungskabel, wie er in Motorrädern und
Mopeds verwendet wird, worin das besagte Verbindungskabel (1) an seinem unteren Ende
einen Verbindungskopf (2) hat, der am Vergaserzylinder befestigt ist, und am gegenüberliegenden
Ende ein weibliches Kabelende (3) verbunden mit einem Gaszug hat, wobei das Verbindungskabel
(1) eingehüllt ist in ein Verstärkungsrohr (4) aus Metall oder Plastik, dass das Verstärkungsrohr
gerade oder gebogen und mit einer Fixierschraube (6) zur Verbindung mit einer Zug-
oder Schiebeabdeckung (7) versehen ist und ausgerüstet ist mit einer Plastikschicht
(5) zum Schutz des Verbindungskabels (1), dass sich diese Plastikschicht zwischen
dem Verbindungskabel (1) und dem Verstärkungsrohr (4) befindet, dass der Gaszug zur
direkten Verbindung mit einem Gaspedal angeordnet ist, wobei der Gaszug mit einem
männlichen Ende (9) zur Verbindung mit dem weiblichen Ende (3) des Verbindungskabels
(1) ausgestattet ist, dass der besagte Gaszug weiterhin, an seinem Ende, mit einem
elastischen Ring (8) der Schiebeabdeckung (7) ausgestattet ist.
1. Mécanisme de commande d'un carburateur comportant un câble intermédiaire, du type
utilisé dans les motocycles et des cyclomoteurs, selon lequel ledit câble intermédiaire
(1) possède, à son extrémité inférieure, une tête de liaison (2) qui est reliée au
cylindre du carburateur, et, à une extrémité opposée, un embout femelle (3) relié
à un câble d'accélérateur, ledit câble intermédiaire (1) étant contenu dans un tube
support (4) en métal ou en plastique, ledit tube support étant courbé ou droit et
pourvu d'une vis d'extrémité fixe (6) pour connexion à un tendeur ou un capot coulissant
(7) et d'un revêtement plastique (5) protégeant le câble intermédiaire (1), ledit
revêtement plastique étant placé entre ledit câble intermédiaire (1) et le tube support
(4), le câble d'accélérateur, qui est disposé pour être relié directement à un levier
d'accélérateur, étant pourvu d'une tête mâle (9) pour la liaison à la tête femelle
(3) du câble intermédiaire (1), ledit câble d'accélérateur étant également pourvu,
à son extrémité, d'une bague élastique (8) du capot coulissant (7).