Direct-drive physical exercise appts. with high-power DC motor

摘要

The output shaft (11) of the motor incorporates a wedge-shaped groove (111) and a threaded bore (112). It is flanked by a rotary shaft (12) and a stationary shaft (13) with a stay (14) on its far side. A stop (2) with a central slot (21) is screwed to the front cover of the motor for guidance of a cable (5) wound around a grooved drum (4) and terminated with a rubber ball (51). Reverse rotation is opposed by a pawl (32) engaging the teeth of a ratchet wheel (31). Motor current is controlled by a microprocessor to a fixed level.