| 摘要 |
A human performance dynamometer for testing eccentric contractions and also concentric contractions of the human muscles. The dynamometer provides for free-limb acceleration during concentric contractions, whereby the user can accelerate the input shaft of the dynamometer to the set speed without any resistance from the dynamometer. The dynamometer has two parallel shafts which are geared together and rotate in opposite directions to one another. The dynamometer has an input shaft for connection to limb engaging means. A motor is operatively connected to one of the parallel shafts through a speed reducer. Located on each shaft is an overrunning spray clutch, each of which may be disengaged from the system if eccentric contractions are desired for one or both directions of rotation of an input shaft. Each outer race of the respective overrunning clutch is connected to its respective parallel shaft. The inner race of each overrunning clutch is geared to the input shaft. A spring clutch on one of the parallel shafts is used to lock together the inner race and the outer race of one of the overrunning clutches, thereby allowing for eccentric contractions in both directions of the rotation of input shaft when the other overrunning clutch is disengaged. A motor controller is also provided for controlling the motor.
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