Motor assembly for pulley chain - has laterally enlarged orifices in housing which only come into contact with chain when it is at maximum displacement during rotation of suspended load

摘要

The motor may be driven pneumatically or electrically and together with the drive motor includes a gearbox and a housing in which a pinion wheel is located. This may be driven in both directions and carries a chain (12) with a hook (19) attached to either end. The chain passes through orifices formed in the housing which are enlarged in a lateral direction. The chain only comes into contact with the orifices as a load (20) is rotated which is suspended in the two hooks. During this process the two lengths of chain are displaced to their furthest positions and part of the chain comes into contact with the upper edge of the orifice. ADVANTAGE - Allows a load suspended in a pulley system to be rotated.