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Difference between revisions of "Cardan Shafts"
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Cardan shafts are carriers of torque: they are subject to torsion and shear stress, equivalent to the difference between the input torque and the load. They must therefore be strong enough to bear the stress, whilst avoiding too much additional weight as that would in turn increase their inertia.To allow for variations in the alignment and distance between the driving and driven components, drive shafts frequently incorporate one or more universal joints, jaw couplings, or rag joints, and sometimes a splined joint or prismatic joint. | Cardan shafts are carriers of torque: they are subject to torsion and shear stress, equivalent to the difference between the input torque and the load. They must therefore be strong enough to bear the stress, whilst avoiding too much additional weight as that would in turn increase their inertia.To allow for variations in the alignment and distance between the driving and driven components, drive shafts frequently incorporate one or more universal joints, jaw couplings, or rag joints, and sometimes a splined joint or prismatic joint. | ||
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===Disadvantages=== | ===Disadvantages=== | ||
* A cardon shaft system weighs more than a chain system, usually 1-2 pounds heavier | * A cardon shaft system weighs more than a chain system, usually 1-2 pounds heavier | ||
* Many of the advantages claimed by drive shaft's proponents can be achieved on a chain-driven bicycle, such as covering the chain and [[ | * Many of the advantages claimed by drive shaft's proponents can be achieved on a chain-driven bicycle, such as covering the chain and [[gears]] | ||
* Use of lightweight derailleur gears with a high number of ratios is impossible, although hub gears can be used | * Use of lightweight derailleur gears with a high number of ratios is impossible, although hub gears can be used | ||
* Wheel removal can be complicated in some designs . | * Wheel removal can be complicated in some designs . | ||