How a truck crane can carry large cargo depends on the boom, so the boom is the most important part of the crane. The principle from Baidu is that the crane is using the pulley at the top of the boom to support the winch wire rope. Heavy objects, so the role of the boom is to suspend and carry objects. 1. Crane structure The boom is usually divided into two parts: the main arm and the deputy arm. It can be divided into two types. One is a truss structure boom welded by profiles and pipes, and the other is a box-type structure boom of various sections. . Although there are two kinds of structures, with the development of truck cranes, most of the main cranes of truck cranes are box-type structures, and only a few of them are truss structures. 2. Boom effect With the main and auxiliary arms, then when the height of the main arm can not meet the needs, the auxiliary arm can be connected at the end of the main arm to achieve the purpose of lifting the object to a higher position. However, the jib can only lift lighter objects, so when carrying cargo, test its stability. Among them, the foldable truss structure jib is the most common. 3. The boom expansion principle There are four types of telescopic booms: sequential telescoping mechanisms, synchronous telescoping mechanisms, independent telescoping mechanisms, and combined telescoping mechanisms. The four types of telescoping methods are different. Inadequate can also be understood literally, the order is mainly in a certain sequence of quarter-by-section expansion; synchronization is that each arm of the telescopic arm at the same relative speed to expand and contract; independent is the arm can be independent expansion and contraction institutions The combination is that when the telescopic boom exceeds three sections, any two telescopic methods listed above can be used for telescoping. This shows the importance of the crane boom. It is important to confirm the quality of the boom at the time of purchase and to avoid the purchase of shoddy goods.
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