Crane is a kind of multi action lifting machine which can lift and carry heavy objects vertically in a certain range. Also known as crown block, aerial crane, crane.
Some working characteristics of hoisting equipment (cantilever crane) are intermittent movement, that is to say, the corresponding mechanism of reclaiming, moving, unloading and other actions in a working cycle works alternately. The development and application of crane in the market is more and more common.
Because there are often some accidents when traveling without outrigger or crane, and the traveling speed is faster than that of crawler crane (crawler crane); the operation is stable, the lifting capacity is large, and the crane can walk within a specific range, but it is necessary to ensure that the road is smooth and solid, the tire pressure meets the requirements, and the lifting distance from the air shall not exceed 50cm; the long-distance walking with load shall be prohibited. In order to ensure the safety of operation, at present, it is fundamentally forbidden to stop lifting operation without outriggers.
The working mechanism of crane includes lifting mechanism, operating mechanism, luffing mechanism and rotating mechanism, which are called four mechanisms of crane.
(1) hoisting mechanism is a vertical lifting mechanism used to complete the material lifting. It is an indispensable part of any crane, so it is the most important and fundamental mechanism of the crane.
(2) the operating mechanism is a mechanism that carries materials through the operation of a crane or a crane trolley. It can be divided into two types: the self-propelled type and the traction type according to the driving mode.
(3) luffing mechanism is a special working mechanism of boom crane. The luffing mechanism changes the operating range by changing the length and elevation of the boom.
(4) the rotating mechanism is to make the boom rotate around the vertical axis of the crane and move the animal materials in the annular space. The crane moves through a single mechanism or a combination of multiple mechanisms to carry materials.
