Drive train swing arm
A drive unit swing arm is a design for scooters and motorcycles in which the engine, gearbox and wheel drive are designed as a fixed unit that also serves as a rear swing arm . The motor and drive housing is pivotably mounted in the motorcycle frame and follows the movements during compression and rebound. That is why the drive train swing arm is (at least in part) counted among the unsprung masses.
History and technology
Norbert Riedel made the first use of the drive unit swing arm on the Vespa (1946) and Lambretta (1947) motor scooters as well as on the Imme motorcycle (1948) .
Since the 1990s, scooters have been equipped with a drive unit swing arm, which consists of a motor, clutch, continuously variable V-belt transmission (the variator) and rear axle drive. The engine's crankshaft is connected to a pair of split pulleys, over which a wide V-belt runs. The variator enables continuously different ratios by changing the distance between the pulley halves. The V-belt is shifted radially, that is, it runs on different diameters, which changes the translation.
Web links
Individual evidence
- ↑ a b Stefan Knittel: Motorcycle Lexicon . BLV Verlag, Munich 1981, ISBN 3-405-12226-0 , p. 111.
- ↑ Wolfgang Matschinsky: Wheel guides of road vehicles: Kinematik, Elasto-Kinematik and construction , 3rd edition, Springer Verlag Berlin Heidelberg 2007, ISBN 978-3-540-71196-4 , p. 379.
- ^ Rolf Gscheidle et al .: Expertise in automotive technology . Europa-Lehrmittel, Haan-Gruiten, 30th edition 2013, ISBN 978-3-8085-2240-0 , p. 714.
- ↑ U.S. Patent 156609 , Corradino D'Ascanio
