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Bei Fahrrädern gibt es im Wesentlichen drei Stellen, an denen men [[Linksgewinde]] findet: | |||
* Linkes [[Pedal]] | |||
* Rechte [[Tretlager]]gehäuseseite | |||
* [[Freilauf]]konus | |||
Diese sorgen dafür, dass sich Die Gewinde unter Last nicht selbst lösen. Dieses Lösen wird ausgelöst durch [Präzession]], in der ein rundes Objekt in einem runden Loch in einer Richtung zirkuliert und sich selbst in Gegenrichtung dreht. | |||
For a pedal, a rotating load arises from downward pedaling force on a spindle rotating with its crank, making the predominantly downward force effectively rotate about the pedal spindle. What may be less evident is that even tightly fitting parts have relative clearance due to their elasticity, metals not being rigid materials, as is evident from steel springs. Under load, micro deformations, enough to cause motion, occur in such joints. This can be seen from wear marks where pedal spindles seat on crank faces. | For a pedal, a rotating load arises from downward pedaling force on a spindle rotating with its crank, making the predominantly downward force effectively rotate about the pedal spindle. What may be less evident is that even tightly fitting parts have relative clearance due to their elasticity, metals not being rigid materials, as is evident from steel springs. Under load, micro deformations, enough to cause motion, occur in such joints. This can be seen from wear marks where pedal spindles seat on crank faces. |