Lever Hoists

A manually operated lever hoist is a tool for pulling a load in any direction. The device can be used to lift a load in the vertical, horizontal and diagonal plane. The design of the manual lever hoist is simple, which minimizes the effort applied at any given moment.

Purpose

A hoist is a mechanism used to lift a load in the vertical or horizontal plane through force transmitted from the lever and drive to the drum, to which a cable or chain is attached.

A manual hoist has 3 uses:

1. For towing a vehicle. For example, to pull a car toward a tree or a static object if it gets stuck. The device is essential for vehicles intended for off-road use.
2. Lifting a load. Lever hoist models can lift over 2 t. However, for this purpose it is more effective to use chain hoists or crane beams built on the hoist mechanism.
3. In sea and river navigation, hoists are used for mooring ships.

A cable hoist is used in wells to draw water.

Design

The lever hoist is compact, which allows it to fit in a car trunk. Its design consists of a sturdy steel frame housing the mechanism. Force is transmitted to the drum through a lever mounted in the housing. The increased leverage makes it possible to use the device in extreme situations. The pulling force of modern lever hoist versions is 2 t, 4 t or 5 t with the standard lever installed. Increasing the lever length raises the pulling force. Telescopic levers are also fitted, or an extended lever version is offered as an option.

The ratchet secures the cable in the required position. The mechanism consists of a wheel with teeth against which a pawl rests. This prevents reverse rotation and maintains cable tension.

Material

During operation of the hoist, the structural components are subject to high loads, so only high-strength steel grades capable of withstanding loads over 400 N/mm² are used.

Drums are made from SCh15-12 grade cast iron or steel with equivalent strength characteristics. Mechanism parts are made from grade 30 or 40 steel. A casting production method is used.

Shafts are made from grade 40 steel stock. Housings are not subject to load and can therefore be made from light metals.

How to choose?

Hoist models with a load capacity of over 2 tons are produced in series. Before purchasing, the following parameters should be determined:

1. Design. Strong metal and component strength are required. During operation there should be no play or unusual noise, as this increases the risk of injury.
2. A quality rigging element. For motorists, a cable or strap will work. The former is more reliable, the latter is easier to put back in place.

Cable length. Depending on the task, models with a cable of 5 m or more should be chosen.