| 摘要 |
FIELD: mechanical engineering; load handling facilities. SUBSTANCE: invention relates to means of mechanization of lifting and handling of different loads which can be manual type. Proposed device contains housing, hook, chain, outlet sprocket and drive with drive shaft. Said drive contains three axially arranged races, namely, outer, intermediate and inner ones. Solids of revolution are installed between said races for contacting with working surfaces of races and wedging. Two rows of spring-loaded solids of revolution are installed between outer and inner races, and one row of spring-loaded solids of revolution is located between intermediate and inner races. Freely rotating rollers are installed on peripheral part of outer race, and drive shaft with shaped cam is placed between said rollers. Device is provided with levers one of which is mounted on housing hub and is made for alternate contacting with solids of revolution of each row located between outer and intermediate races, and other is aligned with intermediate race and is made for alternate contacting either with each of solids of revolution located between device housing and inner race, or with housing of inner race to rotate outlet sprocket. EFFECT: improved convenience in use. 8 dwg |
