Hoisting machinery can be divided into light and small lifting equipment, elevators, cranes and overhead monorail systems according to different structures. Light and small lifting equipment mainly includes lifting blocks, spreaders, jacks, manual hoists, electric hoists and ordinary winches, most of which are small in size, light in weight and easy to use. Except for electric hoists and winches, most of them are driven by human power and are suitable for occasions where work is not heavy. They can be used alone or in some cases as lifting mechanisms for cranes. Some light and small lifting equipment have a large lifting capacity, such as liquid
The lifting weight of the truck crane pressure jack has reached 750 tons. The lifts are mainly used for vertical or near vertical lifting movements with fixed lifting paths, including elevators, lifting platforms, mine hoists and hopper elevators. A crane is a multi-action hoist that vertically lifts and transports heavy objects horizontally within a certain range. The overhead monorail system has lines formed by rigid hanging rails that can transport materials to various parts of the plant or to the exterior of the plant.
Crane machinery basic mechanism
The use of various lifting appliances is different, and there are great differences in construction, but they all have a lifting mechanism that realizes the basic action of lifting. Some hoisting machinery also have an operating mechanism, a luffing mechanism, a slewing mechanism or other specialized working mechanism. The material can be lifted and lowered by a flexible member such as a wire rope or a lifting chain, or it can be lifted by a screw or other rigid member.
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