| 摘要 |
Abstract: An adjustable−speed life−saving apparatus comprises shell, drum, life rope and resistance wheel hub motor. One end of the life rope is fixed and wound on the drum which is set in the shell. The resistance wheel hub motor is set in the drum, and comprises wheel hub, variable speed damp apparatus, shift and rotor, and is supported by the main shaft in the shell. The wheel hub permanently connects with the drum, and drives rotor after damping speed−up by variable speed damp apparatus, rotor circuit links unilateral breakover diode through outer jointing wire. The present invention provides a salty, reliable, easy using adjustable−speed life−saving apparatus.
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