Introduction:A crane, also known as a crane, crane or crane, is a multi-action lifting machinery that lifts vertically and carries heavy objects horizontally within a certain range. This machinery lifts or lifts and moves heavy objects by means of a lifting hook or other fetching device. The working process of lifting machinery generally includes steps such as lifting, running, descending and returning to the original position.
1. Crane classification
Types of cranes include overhead cranes, gantry cranes, tower cranes, jib cranes, and mobile cranes, among others. The structure and working principle of these cranes are different, but their basic composition and function are similar.
2. Tire crane
Its driving cab and lifting control room are combined into one, and it is evolved from a crawler crane (crawler crane). The crawler and walking bracket part of the traveling mechanism of the tire crane are transformed into a chassis with tires, thus overcoming the shortcomings of the crawler crane (crawler crane) track shoes causing damage to the road surface. The tire crane is a material handling machine, with stable operation and large lifting capacity, and can lift and walk within a specific range. However, in order to ensure the safety of the operation, it is necessary to ensure that the road is smooth and solid, the tire pressure meets the requirements, the lifting from the ground shall not exceed 50cm, and it is also forbidden to walk long distances with load.
3. Overhead crane
It is a lifting equipment that is cross-framed over workshops, warehouses and stockyards for material lifting. Because its two ends sit on tall cement pillars or metal supports, and the shape resembles a bridge, it is called an overhead crane. The bridge frame of the overhead crane runs longitudinally along the track laid on the elevated on both sides, which can make full use of the space under the bridge to lift materials without being hindered by ground equipment. It is a kind of lifting machinery with the widest range of use and the largest quantity.
Fourth, tower lifting equipment
Thanks to the application of a balance of materials and mechanics in modern industry, it is almost always composed of the same basic components and is able to meet the optimal combination of height requirements and lifting capacity. Its main part can be roughly divided into the main frame, slewing device, operating room, lifting arm, reaction arm, motor winch, hook, and counterweight.
Summary of references:
1) A full set of crane drawings (including parts and electrical drawings).
2) Crane design manual and crane calculation examples.
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