B - Operations – Transporting – 62 – K
Patent
B - Operations, Transporting
62
K
B62K 25/28 (2006.01)
Patent
CA 2572642
The invention relates to a rear suspension of a vehicle, such as a bicycle, a motorcycle or similar. The invention is of the type that comprises: a chassis (1); a swing arm (7) which is solidly connected to the chassis (1) and which bears the axle (11) of the hub of a drive wheel; and a shock absorber (15), the ends of which are solidly connected to the chassis (1) and the swing arm (7) respectively, the motor torque being transmitted to the drive wheel by means of a chain (Z). The aforementioned swing arm (7) is solidly connected to the chassis (1) by at least two articulation means (12, 13), such that the arm (7) pivots around a point, known as the instantaneous centre of rotation (C), which can move when the hub of the drive wheel moves to either side of the reference position thereof (Pr), said reference position corresponding to the position of the axle (11) of the hub of the drive wheel when the vehicle is in static equilibrium. The inventive suspension is characterised in that the instantaneous centre of rotation (C) moves upwards along a parabolic trajectory (T) having an asymptote (A) which is oriented towards the rear free end of the swing arm (7) bearing the axle (11) of the hub of the drive wheel when said hub moves above the reference position Pr thereof.
La présente invention concerne une suspension arrière d'un véhicule tel qu'une bicyclette, une moto ou analogue, du type comportant un châssis (1), un bras oscillant (7) solidaire du châssis (1) portant l'axe (11) du moyeu d'une roue motrice et un amortisseur (15) dont les extrémités sont solidaires respectivement du châssis (1) et du bras oscillant (7), le couple moteur étant transmis à la roue motrice par une chaîne (Z), le bras oscillant (7) étant solidarisé audit châssis (1) par au moins deux moyens d'articulation (12,13) de telle manière que le bras oscillant (7) pivote autour d'un point dit centre instantané de rotation C mobile lorsque le moyeu de la roue motrice se déplace de part et d'autre de sa position de référence Pr correspondant à la position de l'axe (11) du moyeu de la roue motrice lorsque le véhicule est en position d'équilibre statique ; ladite suspension est remarquable en ce que le centre instantané de rotation C se déplace vers le haut suivant une trajectoire T parabolique dont l'asymptote A est orientée vers l'extrémité libre arrière du bras oscillant (7) portant l'axe (11) du moyeu de la roue motrice lorsque ledit moyeu de la roue motrice se déplace au dessus de sa position de référence Pr.
Antonot Emmanuel
Lesage Philippe
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Cycles Lapierre
Lesage Philippe
LandOfFree
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