Drive shaft, driveshaft, driving shaft, propeller shaft (prop shaft), or Cardan shaft to be used for various types of bicycles, tricycles, quadracycles, unicycles, infinitely wheeled cycles, mopeds, and motorized bicycles (whether propelled solely by human input and/or partial/full input by human input, electricity, gas, or other energy means). All cycle type terms now referred to as “bicycles”

摘要

The invention is a drive shaft, driveshaft, driving shaft, propeller shaft (prop shaft), or Cardan shaft to be used for various types of bicycles, tricycles, quadracycles, unicycles, infinitely wheeled cycles, mopeds, and motorized bicycles (whether propelled solely by human input and/or partial/full input by human input, electricity, gas, or other energy means). All cycle type terms now referred to as “bicycles”. Gears and bearings are mounted within a structural housing at the power input location and the power output location. A shaft is intermediary to the front and rear gear/bearing structures. This shaft can be fixtured on either end with CV joints. Ultimately, gear alignment is at the heart of an efficient, long lasting driveshaft system. Gear alignment has been a core issue with other bicycle shaft drives prior to or currently on the market. Other driveshaft systems have not expressed the importance of a stiff system which begins with the bicycle frame fixture mounting points. The optimum sequence is the following: stiff frame fixtures accept stiff shaft housing which then supports proper type of bearings. This then optimizes gear alignment. Our floating shaft (claim 5) prevents any significant transmission of axial load which may occur due to bicycle frame bending under load. The result: a driveshaft system that can consistently deliver power to the wheels and give the operator a virtually maintenance-free riding experience.