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.

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.

A linear gear shift mechanism for chainless vehicles includes a gear shift unit having a support rotator, transmission balls and driving posts, with the transmission balls disposed in the support rotator, with a cylindrical receiving portion disposed on each transmission ball radially, with the driving posts disposed in the cylindrical receiving portions along radial direction of the support rotator and rotating from radial direction thereof to but not reach axial direction of the support rotator; an axial power input rotator having an inward-tilted power input annular surface; an axial power output rotator having an inward-tilted power output annular surface, with the transmission balls clamped between inward-tilted power input and output annular surfaces and support rotator; a tread-required transverse power source meshing with axial power input rotator; an axial power transfer portion meshing with axial power output rotator axially; a transverse power output portion meshing with axial power transfer portion.

A linear gear shift mechanism for chainless vehicles includes a gear shift unit having a support rotator, transmission balls and driving posts, with the transmission balls disposed in the support rotator, with a cylindrical receiving portion disposed on each transmission ball radially, with the driving posts disposed in the cylindrical receiving portions along radial direction of the support rotator and rotating from radial direction thereof to but not reach axial direction of the support rotator; an axial power input rotator having an inward-tilted power input annular surface; an axial power output rotator having an inward-tilted power output annular surface, with the transmission balls clamped between inward-tilted power input and output annular surfaces and support rotator; a tread-required transverse power source meshing with axial power input rotator; an axial power transfer portion meshing with axial power output rotator axially; a transverse power output portion meshing with axial power transfer portion.

The present invention discloses a bicycle shaft transmission assembly including a bottom bracket engaged with a crank in a front part and a wheel hub in a rear part, a front main gear mounted on the bottom bracket, a rear main gear mounted on the wheel hub, a transmission shaft eccentrically arranged between the front main gear and the rear main gear. The front main gear is matched with a front end gear, and the rear main gear is matched with a rear end gear. The front main gear is externally provided with a front housing, the transmission shaft is externally provided with a transmission shaft housing, the rear main gear is externally provided with a rear housing, a front end of the transmission shaft housing is engaged with the front housing, a rear end of the transmission shaft housing is engaged with the rear housing.

The present invention discloses a bicycle shaft transmission assembly including a bottom bracket engaged with a crank in a front part and a wheel hub in a rear part, a front main gear mounted on the bottom bracket, a rear main gear mounted on the wheel hub, a transmission shaft eccentrically arranged between the front main gear and the rear main gear. The front main gear is matched with a front end gear, and the rear main gear is matched with a rear end gear. The front main gear is externally provided with a front housing, the transmission shaft is externally provided with a transmission shaft housing, the rear main gear is externally provided with a rear housing, a front end of the transmission shaft housing is engaged with the front housing, a rear end of the transmission shaft housing is engaged with the rear housing.

A disc (1, 2) for a friction clutch (3), including an annular plate (4, 5) having friction surfaces on both faces (6, 7) and at least one seat (8, 9) for at least one spring (10, 11), wherein the at least one spring is configured to space adjacent discs in a friction clutch by at least one seat, and wherein the at least one spring is integral with the disc. Using the disc proposed here for a friction clutch, it is possible without additional components, or with an integrated use of existing components, to ensure a reliable spacing of the discs relative to one another.

A disc (1, 2) for a friction clutch (3), including an annular plate (4, 5) having friction surfaces on both faces (6, 7) and at least one seat (8, 9) for at least one spring (10, 11), wherein the at least one spring is configured to space adjacent discs in a friction clutch by at least one seat, and wherein the at least one spring is integral with the disc. Using the disc proposed here for a friction clutch, it is possible without additional components, or with an integrated use of existing components, to ensure a reliable spacing of the discs relative to one another.

A final gear box accommodates a pinion gear and a bevel gear in a rotatable manner and contains an oil. A recess is provided at a downstream end of a drive shaft. The recess and the upstream end of the pinion gear shaft portion are splined coupled with each other so that the drive shaft and the pinion gear can be rotated together and relatively moved in an axial direction. A space permitting relative movement between the drive shaft and the pinion gear is provided between the pinion gear and the recess. The pinion gear is provided with a hollow portion which pierces the pinion gear in the axial direction and conducts oil to the space portion.

A final gear box accommodates a pinion gear and a bevel gear in a rotatable manner and contains an oil. A recess is provided at a downstream end of a drive shaft. The recess and the upstream end of the pinion gear shaft portion are splined coupled with each other so that the drive shaft and the pinion gear can be rotated together and relatively moved in an axial direction. A space permitting relative movement between the drive shaft and the pinion gear is provided between the pinion gear and the recess. The pinion gear is provided with a hollow portion which pierces the pinion gear in the axial direction and conducts oil to the space portion.