The invention discloses a labor-saving hoist, and aims to improve two-stage and double-gear transmission speed change into three-stage and double-gear transmission speed change on the basis of a gear type chain hoist so as to reduce driving force. A hand-cranking wrench is added for driving, and a rope is used as a hoisting rope.
本发明公开了省力葫芦,旨在齿轮式手拉葫芦的基础上,由二级、双齿轮传动变速,提升为三级、双齿轮传动变速,减少驱动用力。并增加手摇手扳驱动,用绳索作起重绳。
Labor-saving hoist
省力葫芦
2022-06-10
Patent
Electronic Resource
Chinese
Labor-saving device for detection of no-load hand hoist motion
European Patent Office | 2017
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