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Crane is a common name of crane, which is a kind of lifting and handling machinery widely used in ports, workshops, electric power, construction sites and other places. The name crane is the unified title of lifting machinery. Often referred to as cranes are mainly truck cranes, crawler cranes and tire cranes. The use of cranes is related to lifting equipment, emergency rescue, lifting, machinery and rescue.
Multi-function lifting machinery, used for vertical lifting and horizontal handling of heavy objects within a certain range. Also known as crane. Belonging to material handling machinery. The working characteristic of crane is intermittent motion, that is, the corresponding material taking, transportation and unloading mechanisms work alternately in a working cycle.
Crane mainly includes hoisting mechanism, running mechanism, luffing mechanism, slewing mechanism and metal structure. Lifting mechanism is the basic working mechanism of crane, which is mostly composed of suspension system and winch, and some lift heavy objects through hydraulic system. Running mechanism is used to move heavy objects vertically and horizontally or adjust the working position of crane, and generally consists of motor, reducer, brake and wheel. The luffing mechanism is only equipped on the jib crane, and the amplitude decreases when the jib rises and increases when it falls, which can be divided into two types: balanced luffing and unbalanced luffing. The slewing mechanism is used for slewing the boom and consists of a driving device and a slewing support device. Metal structure is the skeleton of crane, and the main load-bearing components such as bridge, boom and gantry can be box structure or truss structure, or web structure, and some can use section steel as supporting beam.
References:
Baidu encyclopedia-crane