A chain hoist with a chain wheel and a load chain looped around the chain wheel has a shaft rotatably mounted in the housing for driving the chain wheel. A threaded disc with internal thread is connected to an external thread of the shaft and has a drive gear tooth system engaged by a force element actuated manually or motorized. A brake disc rotatable relative to shaft and threaded disc has a braking surface facing a drive surface of the shaft and a braking surface facing the threaded disc. The brake disc has locking teeth engaging a safety catch of the housing. A freewheel device is provided to increase an axial distance between threaded disc and drive surface. Centrifugal elements with outward friction surface are fixed to the threaded disc and expand outwardly against a spring force to contact a braking surface of the housing with their friction surface.
Chain hoist
2019-07-16
Patent
Elektronische Ressource
Englisch
IPC: | B66D Haspeln , CAPSTANS |