Crane

Abstract

The invention relates to the technical field of engineering mechanical equipment, in particular to a crane. The crane provided by the invention comprises a chassis, a rotary table, a main arm, a mast, a luffing mechanism, a main counterweight mechanism and an additional counterweight mechanism. Wherein one end of the mast is pivotally connected with the rotary table, one end of the luffing mechanism is connected with the other end of the mast, the other end of the luffing mechanism is connected with the other end of the main arm, the length of the luffing mechanism is adjustable, the main counterweight mechanism is arranged at the other end of the rotary table, and the additional counterweight mechanism is arranged at the other end of the mast. According to the crane provided by the invention, due to the design of the additional counterweight mechanism, the anti-tipping capability can be greatly improved. In addition, the additional counterweight mechanism is connected with the mast, so that the gravity of the additional counterweight mechanism can be transmitted to the rotary table through the mast, the stress state of the rotary table slewing bearing can be effectively improved, and the length and hoisting performance of the boom under the standard working condition are improved.

Description

technical field [0001] The invention relates to the technical field of construction machinery and equipment, in particular to a crane. Background technique [0002] According to the requirements of construction, cranes are generally set with standard working conditions and super-lifting working conditions. Among them, the standard working condition has the characteristics of low input cost, convenient disassembly and assembly, and high efficiency compared with the super-lifting working condition. The length of the boom and the lifting performance of the standard working condition put forward higher requirements on the mast, turntable and slewing bearing. When the capacity of the mast, turntable and slewing bearing is not enough to meet the requirements, by adding a turntable counterweight at the end of the turntable, the boom length and hoisting performance in standard conditions can be effectively improved. [0003] However, in the related art, the crane has defects, such ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a crane to solve the problem in the prior art that when the turntable or the slewing bearing reaches the limit of bearing the balance weight of the turntable, the arm length and performance of the crane under standard working conditions reach the limit. If the counterweight of the turntable is increased again, it may be Defects that lead to damage to the turntable structure or slewing bearing can improve the stress state of the slewing bearing, improve the length of the jib under standard working conditions and the lifting performance, increase the force arm of the lifting arm, and the operation is simple

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