| 摘要 |
A hand-operated sweeping machine having two circular brooms mounted in the front area, a motor drive which rotates the circular brooms, a drive mechanism which transfers a driving force derived from the forward motion of the sweeping machine to drive the circular brooms when the motor drive is not operating, and an interrupting mechanism which automatically interrupts a connection between the motor drive and the driving mechanism when the motor drive can rotate the circular brooms faster than the driving mechanism. When the motor drive of the sweeping machine is inoperative, as when there is no electricity available to operate an electric motor drive, the sweeping machine may be operated by the driving mechanism driving the circular brooms. The interrupting mechanism automatically prevents the motor drive when operating from transferring driving force to the driving mechanism and thereby undesirably driving forward motion of the sweeping machine.
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