Cargo boom and crane

Abstract

The invention discloses a cargo boom and a crane. The cargo boom comprises a multi-section arm which sequentially comprises a base arm, an inner section arm unit and a tail section arm from outside to inside, wherein arm pins are installed between adjacent section arms; the inner section arm unit at least comprises a transitional inner section arm and a position adjusting inner section arm located at a first section in the transitional inner section arm; the base arm and the transitional inner section arm are provided with first arm pin manholes; second arm pin manholes are formed in the rest of inner section arms in the inner section arm unit; the transitional inner section arm is further provided with an assistant arm pin hole; when the cargo arm is located in a full-shrinking state, the first arm pin manholes are opposite to each other and are not aligned with the second arm pin manholes; when the position adjusting inner section arm is moved to ensure that arm pins and the assistant arm pin holes are opposite to each other, the first arm pin manholes are aligned with the second arm pin manholes. According to the cargo arm, the arm pins of the sections of arms can be overhauled without detaching the inner section arms, so that the cargo boom has the advantage of convenience in maintenance of the arm pins of the inner section arms.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a boom and a crane. Background technique [0002] Crane is a kind of machine tool used for lifting and transporting materials. It is widely used in lifting and hoisting operations in construction sites, ports, oil fields, railways, warehouses, wind power and other working conditions. In recent years, with the acceleration of engineering construction, cranes have played an increasingly important role in many industries, and people have paid more and more attention to the improvement of crane performance. [0003] The crane is mainly composed of the lifting part on the car and the chassis part on the car. Among them, the lifting part of the car is composed of five parts: the boom, the electrical system, the hydraulic system, the operating system and the turntable. The jib is the core component of the crane and the most important load-bearing structural part for hoisting opera...

AI Technical Summary

Problems solved by technology

The current arm pin inspection holes are all opened on the outer arm near the front end of the arm pin hole. The defect is that: without dismantling the arm, only the arm pin of the first inner segment arm can be inspected, and the second inner segment cannot be repaired. The arm pins of the arm and beyond are overhauled

Therefore, the maintenance operation of the inner section arm is more cumbersome

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