Frame structure for a double-axle bicycle for several occupants

B - Operations – Transporting – 62 – K

Patent

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Details

B62K 5/00 (2006.01) B62K 5/04 (2006.01) B62K 17/00 (2006.01) B62K 19/00 (2006.01)

Patent

CA 2251806

A frame structure has two adjacent bent pipes (1, 2) which extend in the longitudinal direction of the vehicle and are inclined towards each other. In the illustrated side view, only the bent pipe (1) on the left side of the vehicle can be seen. This bent pipe (1) has a shape similar to that of a bow saw. The idea underlying the invention is that the weight of the vehicle occupants acts on the bent pipe structure and is deflected into forces which push the two ends (4; 6) of the bent pipe away from each other. These deflected forces are in turn absorbed by pipes (10, 11) arranged in the longitudinal direction of the vehicle and which indirectly interconnect the ends of the bent pipes (1, 2), absorbing the traction forces acting therebetween. The two bent pipes (1, 2) are inclined towards each other and thus form a gable, seen in the longitudinal direction. The forces exercised downwards by the weight of the driver upon this structure are thus deflected not only into traction forces acting between the front and rear ends (4, 5; 6, 7) of the bent pipes but also into traction forces acting between the front (4, 5) and rear end (6, 7) of each bent pipe.

Cette structure de cadre de bicyclette comprend deux arcs tubulaires (1, 2) adjacents qui s'étendent dans la direction de la longueur du véhicule et sont inclinés l'un vers l'autre. Dans la vue latérale illustrée, on ne voit que l'arc tubulaire (1) du côté gauche du véhicule. Cet arc tubulaire (1) a une forme similaire à celle d'une scie à arc. L'idée à la base de l'invention consiste à transformer le poids des personnes assises dans le véhicule qui s'exerce sur la structure en arc en forces qui tendent à séparer les deux extrémités (4; 6) de l'arc. Ces forces sont à leur tour absorbées par des tuyaux (10, 11) qui s'étendent dans la direction longitudinale du véhicule et qui relient indirectement les extrémités de l'arc (1, 2) afin d'absorber les forces de traction qui s'exercent entre les deux. Les deux arcs (1, 2) sont inclinés l'un vers l'autre et forment ainsi, vus dans la direction longitudinale, un pignon. Les forces exercées par le poids du conducteur de haut en bas sur cette structure sont ainsi transformées non seulement en forces de traction entre les extrémités antérieures et postérieures (4, 5; 6, 7) des arcs mais aussi en forces de traction entre l'extrémité antérieure (4, 5) et l'extrémité postérieure (6, 7) de chaque arc.

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