Hoists

A hoist is a device for lifting loads to a set height: construction materials, equipment, assemblies and components. Application areas include vehicle maintenance and repair, construction and other fields.

Hoists lift loads ranging from tens of kilograms to tens of tons, which reduces costs when performing operations. Hoists of different sizes, dimensions and performance characteristics are used.

Types and design

Hoists come with manual, lever or electric drive. Manual ones use a block-and-tackle mechanism, but chains are used instead of ropes, as they withstand higher loads.

The basis of the design is a chain drum, onto which the chain winds, a rotation transmission mechanism, a hook and a drive. The chain is run over a beam, cable or other elements. Chain length varies.

Lever hoists have a drive lever fixed to the device housing, so the hook can be suspended at a height convenient for the operator. Lifting is performed by moving the lever.

Chain hoists contain a pair of chains: one for securing the load and a load chain used for lifting. They differ in link size. The operator transmits force by pulling the load chain; it can be suspended considerably higher than with lever equipment.

Electric hoists are more complex in design due to the electric power unit and control pendant. The motor transmits rotational force to the drum, which winds or unwinds the rigging element as the load is picked up or released. Electric hoists more often use wire ropes — they take up less space and reduce the weight of the structure even at greater lengths.

Electric hoists are safer, as manufacturers equip them with auxiliary protection systems, instructions and markings.

Materials, operation and selection

Modern hoists are made of high-strength steel. In environments with increased acidity, austenitic steel is used — it protects against oxidation.

Operating rules for each type of rigging mechanism are specific and are indicated by the manufacturer in the accompanying documentation. It is important to take into account the load limit, operating conditions and other parameters to prevent injury-causing situations in production.

The choice depends on the purpose, loads and frequency of use. For large enterprises, an electric option may be the solution.