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1. (WO2018100088) HIGH PERFORMANCE SYNCHRONOUS TRANSMISSION

Pub. No.:    WO/2018/100088    International Application No.:    PCT/EP2017/081031
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Fri Dec 01 00:59:59 CET 2017
IPC: B62M 7/12
F16D 43/04
Applicants: PIAGGIO & C. S.P.A
Inventors: MARIOTTI, Walter
NUTI, Luca
Title: HIGH PERFORMANCE SYNCHRONOUS TRANSMISSION
Abstract:
A high performance synchronous transmission (1) to be used aboard a motorcycle for transmitting the motion generated by an engine to a driving wheel, between a crankshaft (2) and a hub shaft parallel therebetween and perpendicular to the median plane of the motorcycle, comprising on the crankshaft (2) a centrifugal clutch (5), for the automatic engagement of the first speed above a predetermined rotation regime, and a driving pulley (13) apt to transmit the motion through a subsequent kinematic chain, is provided with a coupling (14, 77) between crankshaft (2) and driving pulley (13) which connects them directly, by determining with its own engagement the exclusion of said centrifugal clutch (5), said coupling (14, 77) being controlled in disengagement when a control lever (20) is in active position.