Design World – August 2019

118 August 2019 http://www.designworldonline.com DESIGN WORLD

There are two main types of

couplings that meet the demands

for reliability and safety in crane and

hoist applications. Here, we explore the

coupling design features you should

look for.

Barrel couplings:

Hoists — which also refer to the lifting

mechanism in cranes — lift and lower

loads using a drum or lift-wheel, around

which a rope or chain wraps. Hoists can be

manually operated, as well as electrically or

pneumatically driven. They can also use chain,

fiber, or wire ropes as their lifting medium.

From steel mills to manufacturing plants,

hoists are used in a range of applications

that involve moving large, heavy products

up and down.

A proven coupling solution for hoists,

barrel couplings connect the cable drum to

the gearbox output shaft and are also used in

winch conveyors and platform hoists. These

couplings transmit torque via barrel-shaped

hardened pins that fit into semicircular

machined openings on the hub and sleeve —

ensuring radial forces are transmitted safely.

DESIGN WORLD http://www.designworldonline.com August 2019 119

Mechanical

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •


• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •


• • • • • • • • • • • • • • • • • • • • •

|^ AdobeStock

Mechanical (Ringfeder) 8-19_Vs4_MS.LL.indd 119 8/7/19 9:55 AM