Coaxial load wheel and cranks

摘要

An exercise machine includes a base, an axle rotationally supported on the base and two cranks connected to the axle. The cranks are rotational synchronously with the axle. A drive wheel unit includes an active wheel provided on the axle so that the active wheel is rotational synchronously with the cranks. A passive wheel unit includes a load wheel supported on the axle so that the load wheel is rotational relative to the axle and a passive connected to the load wheel so that the passive wheel is rotational synchronously with the load wheel. A step-up device includes a shaft rotationally supported on the base and small and large wheels connected to the shaft so that they are rotational synchronously. The small wheel is connected to the active wheel so that they are rotational together. The large wheel is connected to the passive wheel so that they are rotational together.

主权项

1. An exercise machine comprising:
a base; an axle rotationally supported on the base; a first crank operably coupled to a first end portion of the axle; a second crank operably coupled to a second end portion of the axle; an active wheel fixedly mounted to the axle and rotational synchronously therewith, wherein the active wheel is rotationally driven by the first and second cranks; a small wheel operably coupled to the active wheel and rotationally driven thereby; a large wheel operably coupled to the small wheel and rotational synchronously therewith; a load wheel rotationally mounted to the axle and rotational relative to the axle and the active wheel, wherein the load wheel is operably coupled to the large wheel and rotationally driven thereby; and a shaft rotationally supported on the base and spaced apart from the axle, wherein the small wheel and the large wheel are coaxially mounted to the shaft and rotational synchronously therewith.