Motorcycle with improved rear suspension
AssigneeSercati S.A.R.L.
InventorEric Offenstadt
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Abstract
The invention relates to motorcycles of the kind comprising a rear wheel axis carried by at least one suspension arm mounted for oscillations about a suspension travel axis, a resilient suspension member acting between a frame and the suspension arm, and a loop transmission connecting a driving pinion with a driven pinion solid with the rear axle. The technical problem is to provide such a motorcycle with greater suspension stability by under acceleration. In accordance with the invention, in the flat road running condition, the suspension travel axis is disposed in the same plane as the axes of the driving and driven pinions, in front of the driving pinion, so that transmission loop tension tends to reduce suspension excursions. The invention is applicable to chain drive and other loop drives.
Claims13
A motorcycle comprising a frame, front and rear wheels, suspension means guiding said rear wheel for travel relative to said frame in an arc about a suspension travel axis, a motor secured to said frame, and transmission means for transmitting drive from said motor to said rear wheel, said transmission means including a driven pinion connected to the rear wheel axle, a driving pinion mounted on the frame and a flexible loop connecting said pinions whereby tension in said loop transmits drive from said driving pinion to said driven pinion, characterised in that said suspension travel axis is disposed in front of the axis of said driving pinion, whereby tension in said loop tends to reduce excursions of said rear wheel under acceleration.
A motorcycle comprising a frame, front and rear wheels, suspension means guiding said rear wheel for travel relative to said frame in an arc about a suspension travel axis, a motor secured to said frame, and transmission means for transmitting drive from said motor to said rear wheel, said transmission means including a driven pinion connected to the rear wheel axle, a driving pinion and a flexible loop connecting said pinions whereby tension in said loop transmits drive from said driving pinion to said driven pinion, characterised in that said suspension travel axis is disposed in front of the axis of said driving pinion, whereby tension in said loop tends to reduce excursions of said rear wheel under acceleration, said suspension means comprising means enabling regulation of said suspension travel axis to different positions relative to said frame.
A motorcycle comprising a frame, front and rear wheels, suspension means guiding said rear wheel for travel relative to said frame in an arc about a suspension travel axis, a motor secured to said frame, and transmission means for transmitting drive from said motor to said rear wheel, said transmission means including a driven pinion connected to the rear wheel axle, a driving pinion and a flexible loop connecting said pinions whereby tension in said loop transmits drive from said driving pinion to said driven pinion, characterised in that said suspension travel axis is disposed in front of the axis of said driving pinion, whereby tension in said loop tends to reduce excursions of said rear wheel under acceleration, wherein
- said transmission means includes a gearbox having an output shaft and said driving pinion is mounted on said output shaft and
- brake means for said rear wheel comprising a brake disc mounted on said output shaft and friction means for braking said disc.
Dependencies are inferred from the claim text.