Sram Deutschland Gmbh

Michael Kohaupt

Werner Steuer

Gunter Pehse

A shifting device for a multi-speed hub for a bicycle that, comprises a hub axle, a driver, a hub sleeve and an epicyclical transmission with an annulus, a plant carrier, planet wheels and a sun wheel, a control device for changing the gear ratios between the multi-speed hub and a remote control. The gear change is executed exclusively by the lifting out or engagement of pawls which can be controlled by means of a shift unit. The shift sleeve and bushing have projections and gaps and can slide under a respective foot of the pawl thereby enabling the pawls to be forcibly disengaged. An advantage of the invention is the ability to disengage the respective pawl even under load without the need to employ relatively large control forces by means of the remote control.

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Schweinfurt, Germany

Michael Kohaupt