ES1073226U

ES1073226U - Transmission for bikes and similars (Machine-translation by Google Translate, not legally binding)

Info

Publication number: ES1073226U
Application number: ES201030767U
Authority: ES
Inventors: Rafael Sanchez Comitre
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-22
Filing date: 2010-07-22
Publication date: 2010-11-24
Anticipated expiration: 2020-07-22
Also published as: ES1073226Y

Abstract

Transmission for bicycles and the like, of the type that incorporate a pedal axis, to which one or more plates are integral, in which a chain engages through the corresponding derailleur, a chain that at its other end is related to one or several pinions assisted by the corresponding change, pinions integral with the axis of rotation of the wheel of the bicycle or vehicle in question, characterized in that in correspondence with each end of the bottom bracket a tubular casing is jointly fixed thereto, in which it is movable longitudinally a connecting rod, through the corresponding bearings, rod oversized in length, topped by one of its ends and externally in the classic pedal, while internally it is associated with a wheel or steering element, which plays in the bosom of a willing guide parallel to the frame of the bicycle and attached to it, with the particularity that said guide has an annular trajectory with a sensibly elongated expansion in the previous sense. (Machine-translation by Google Translate, not legally binding)

Description

Transmisión para bicicletas y similares.Transmission for bicycles and the like.

Object of the invention

La presente invención se refiere a una transmisión para bicicletas y vehículos a pedales similares, cuya finalidad es la de permitir reducir el esfuerzo por parte del usuario de la bicicleta a la hora de dar pedales.The present invention relates to a transmission for bicycles and similar pedal vehicles, whose purpose is to reduce the effort by the Bicycle user when pedaling.

Background of the invention

Como es sabido, en el ámbito de aplicación práctica de la invención, el de las bicicletas y vehículos similares, el ciclista consigue desplazarse mediante accionamiento de una transmisión que, a través del correspondiente piñón o juego de piñones y cambio transmiten el movimiento de un pedalier a través de uno o varios platos a los que están asociados una pareja de bielas contrapuestas que se rematan en los correspondientes pedales sobre los que se aplica localizadamente la fuerza.As is known, in the scope practice of the invention, that of bicycles and vehicles similar, the cyclist is able to move by drive of a transmission that, through the corresponding pinion or game of pinions and change transmit the movement of a bottom bracket through of one or several dishes to which a couple of opposing connecting rods that are finished off in the corresponding pedals on which force is applied locally.

Como resulta evidente, y por la propia ley de la palanca, cuanto mas largas sean las bielas menor será el esfuerzo necesario para mover la transmisión, y consecuentemente a la bicicleta.As is evident, and by the law of the lever, the longer the cranks, the less effort necessary to move the transmission, and consequently to the bicycle.

Sin embargo, estas dimensiones se ven limitadas por la propia trayectoria circular que describen dichas bielas, de manera que de alargarlas más de lo que es convencional, el usuario impactaría con los pedales/bielas en el suelo, por lo que la longitud de las mismas en la práctica queda limitada a una medida concreta.However, these dimensions are limited. along the circular path that these cranks describe, of way of extending them more than what is conventional, the user would impact the pedals / cranks on the ground, so the their length in practice is limited to one measure concrete

Otra posibilidad podría ser subir el eje pedalier, lo que obligaría al usuario a levantar excesivamente las rodillas cuando los pedales alcanzaran el punto máximo superior, lo cual resultaría incómodo.Another possibility could be to raise the shaft bottom bracket, which would force the user to excessively lift the knees when the pedals reach the highest maximum point, which would be uncomfortable.

Description of the invention

La transmisión para bicicletas que la que la invención propone resuelve de forma plenamente satisfactoria la problemática anteriormente expuesta, permitiendo reducir sensiblemente el esfuerzo de pedaleo, merced a una estructuración sencilla pero de gran eficacia.The transmission for bicycles that the proposed invention resolves in a fully satisfactory way the problematic previously exposed, allowing to reduce sensibly the pedaling effort, thanks to a structuring Simple but very effective.

Para ello, y de forma más concreta, la invención parte de la estructuración básica convencional de cualquier sistema de transmisión, en el que se define un eje pedalier, al que son solidarios uno o mas platos, en los que engrana una cadena a través del correspondiente desviador, cadena que por su otro extremo se relaciona con uno o mas piñones asistidos por el correspondiente cambio, piñones solidarios al eje de giro de la rueda de la bicicleta.To do this, and more specifically, the invention part of the conventional basic structuring of any system of transmission, in which a bottom bracket is defined, to which they are solidarity one or more plates, in which a chain meshes through of the corresponding diverter, chain that at its other end is relates to one or more pinions assisted by the corresponding change, sprockets integral to the axis of rotation of the wheel of the bicycle.

Pues bien, a partir de esta estructuración convencional, la invención centra sus características en el hecho de que en sustitución de las clásicas bielas, y en correspondencia con cada extremidad del pedalier se establezca solidariamente a los mismos una carcasa tubular, en la que es desplazable longitudinalmente una biela, a través de los correspondientes rodamientos, biela que presentará una sección constante, o al menos en la zona de desplazamiento sobre la carcasa del pedalier, y que estará sobredimensionada en longitud, rematándose, como es convencional en el clásico pedal, con la particularidad de que a la extremidad correspondiente al pedal de la biela se le asocia una rueda o elemento directriz, la cual juega en el seno de una guía dispuesta paralelamente al cuadro de la bicicleta y solidaria al mismo, guía que prsentará una trayectoria anular con una expansión sensiblemente alargada en sentido anterior, de manera que la misma describe una trayectoria ovoide, de eje mayor horizontal.Well, from this structuring conventional, the invention focuses its characteristics on the fact that replacing the classic cranks, and in correspondence with each end of the bottom bracket is jointly and severally established themselves a tubular housing, in which it is movable longitudinally a connecting rod, through the corresponding bearings, connecting rod that will present a constant section, or at least in the displacement zone on the bottom bracket housing, and that it will be oversized in length, finishing off, as it is conventional in the classic pedal, with the particularity that at limb corresponding to the crank pedal is associated with a steering wheel or element, which plays within a guide arranged parallel to the frame of the bicycle and in solidarity with same, guide that will present an annular trajectory with an expansion noticeably elongated in the anterior direction, so that it describes an ovoid trajectory, with a horizontal major axis.

Así pues, la biela al ser desplazada con los pies, mediante el movimiento de pedaleo, será obligada a copiar la trayectoria de la guía ovoidal, guía cuyo punto mas bajo quedará situado por encima del suelo, en una posición similar a la que adoptaría una biela convencional en el contexto de una bicicleta, pero con la particularidad de que dicha configuración ovoidal hace que cuando el pedal se desplace hacia la zona anterior de la bicicleta, la biela tienda a desplazarse con respecto al eje pedalier, ampliando por tanto su longitud efectiva y ampliando así el brazo de palanca, haciendo menor el esfuerzo necesario para mover la bicicleta.Thus, the connecting rod when displaced with the feet, by pedaling, will be forced to copy the trajectory of the ovoidal guide, guide whose lowest point will remain located above the ground, in a position similar to that would adopt a conventional connecting rod in the context of a bicycle, but with the particularity that said ovoidal configuration makes that when the pedal moves to the previous area of the bicycle, the connecting rod tends to move relative to the axis bottom bracket, thus extending its effective length and thus extending the lever arm, making less effort to move the bike.

Como resulta evidente, la mayor longitud de las bielas hará que la bicicleta deba ser redimensionada, en orden a que la rueda directriz de la misma en los giros no contacte con las guías de la transmisión objeto de la invención.As is evident, the greater length of the connecting rods will cause the bicycle to be resized, in order to the steering wheel of the same in the turns do not contact the transmission guides object of the invention.

Description of the drawings

Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un único juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente:To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as an integral part of said description, a single set of drawings where with character Illustrative and not limiting, the following has been represented:

La figura 1.- Muestra una vista parcial en alzado lateral de una bicicleta dotada de un sistema de transmisión realizado de acuerdo con el objeto de la presente invención.Figure 1.- Shows a partial view in side elevation of a bicycle equipped with a transmission system performed in accordance with the object of the present invention.

Preferred Embodiment of the Invention

A la vista de la figura reseñada puede observarse como la transmisión que se preconiza está destinada a implantarse en una bicicleta (1), en la que, como es convencional, se define un eje pedalier (2), al que son solidarios uno o varios platos (3), con los que colabora una cadena (4), desplazable a los diferentes platos (3) a través del correspondiente desviador, cadena que por su otro extremo se relaciona con uno o varios piñones (5) a través del correspondiente cambio (6), transmitiendo el movimiento a la rueda motriz (7), concretamente la rueda posterior.In view of the review figure you can observe how the transmission that is recommended is destined to implanted in a bicycle (1), in which, as is conventional, a bottom bracket (2) is defined, to which one or several are integral plates (3), with which a chain (4) collaborates, movable to different plates (3) through the corresponding diverter, chain which at the other end is related to one or more pinions (5) to through the corresponding change (6), transmitting the movement to the driving wheel (7), specifically the rear wheel.

De acuerdo ya con la invención, en correspondencia con cada extremidad del eje pedalier (2) se fijan solidariamente al mismo respectivas carcasas tubulares (8), en cuyo seno es desplazable longitudinalmente cada biela (9), contando para ello con rodamientos (10).In accordance with the invention, in correspondence with each end of the bottom bracket (2) are fixed in solidarity with the same respective tubular housings (8), in whose sine is longitudinally movable each connecting rod (9), counting to this with bearings (10).

Cada biela (9) estará sobredimensionada en longitud, de manera que pueda ser parcialmente extraída e introducida en la carcasa tubular (8), rematándose por uno de sus extremos y exteriormente en el clásico pedal (11), mientras que interiormente se remata con una rueda o elemento directriz (12), que juega en el seno de una guía (14) dispuesta paralelamente al cuadro (15) de la bicicleta y solidaria al mismo.Each connecting rod (9) will be oversized in length, so that it can be partially extracted and introduced into the tubular housing (8), finishing off by one of its ends and outwardly in the classic pedal (11) while internally it is finished off with a wheel or steering element (12), which plays within a guide (14) arranged parallel to the frame (15) of the bicycle and solidarity with it.

La citada guía podrá presentar muy diversas configuraciones, si bien para optimizar la pedalada, se ha previsto que, tal y como se ha comentado con anterioridad, describa una trayectoria ovoide, de eje horizontal, de manera que el punto mas alejado, y correspondiente por tanto a la mayor extensión de la biela (9) coincida con la horizontal, posición en la que resulta más fácil hacer fuerza con las piernas.The aforementioned guide may present very diverse configurations, although to optimize pedaling, it is planned that, as previously mentioned, describe a ovoid trajectory, of horizontal axis, so that the point more remote, and therefore corresponding to the greater extent of the connecting rod (9) coincides with the horizontal, position in which it is more Easy to make strength with the legs.

En el ejemplo de realización práctico elegido, la guía se materializa en una pareja de tabiquillos paralelos convenientemente distanciados a través de la correspondiente estructura metálica, si bien ésta podrá tener otras configuraciones mas complejas y consecuentemente efectivas, como puede ser una guía de sección en omega, o cualquier otra geometría habitual en este tipo de elementos.In the practical example chosen, the guide materializes in a pair of parallel tabs conveniently distanced through the corresponding metal structure, although it may have other configurations more complex and consequently effective, such as a guide section in omega, or any other usual geometry in this Type of elements

Claims

1. Transmission for bicycles and the like, of the type that incorporate a bottom bracket, to which one or more plates are integral, in which a chain engages through the corresponding diverter, a chain that at its other end is related to one or more several sprockets assisted by the corresponding change, sprockets integral with the axis of rotation of the wheel of the bicycle or vehicle in question, characterized in that, in correspondence with each end of the bottom bracket, a tubular housing, in which it is movable, is established in solidarity longitudinally a connecting rod, through the corresponding bearings, oversized connecting rod in length, topped by one of its ends and externally in the classic pedal, while internally it is associated with a wheel or steering element, which plays within a guide provided parallel to the frame of the bicycle and solidarity with it, with the particularity that said guide has an annular trajectory with a noticeably elongated expansion in the anterior direction.

2. Transmission for bicycles and the like, according to claim 1, characterized in that the guides for the connecting rods adopt an ovoidal configuration, with a horizontal major axis.