a crane

Abstract

The invention discloses a crane, which comprises a boom, a chassis and a vehicle frame; also includes a balance weight, a turntable and a balance weight lifting device; a longitudinally extending slideway is arranged from the tail to the center of the turntable; the balance weight lifting device includes a push A hydraulic cylinder and a balance weight hanger; one end of the hydraulic cylinder is hinged to the turntable, and the other end is hinged to the balance weight hanger; the balance weight can move along the slideway to contact the vehicle frame when the hydraulic cylinder is pushed back. With the crane provided by the present invention, due to the improvement of the force state of the rear axle of the crane, the balance weight is weakened by the limitation of the bridge core weight, so the balance weight can be increased to a certain extent under the premise of satisfying the weight limit of the whole machine and the bridge core weight. Therefore, when the crane is working, the counterweight can provide a larger moment to improve the stability moment of the whole crane, which can greatly improve the stability of the whole machine and the performance of the crane.

Description

technical field [0001] The invention relates to the field of engineering machinery, more specifically, to a crane. Background technique [0002] With the development of science and technology, people have higher and higher requirements for mechanical equipment. While meeting the basic work needs, they also require mechanical equipment to optimize their performance. [0003] At present, in the field of construction, hoisting equipment such as cranes and cranes are generally used for construction of large equipment such as steel bars. Among them, the truck crane is widely used because of its good mobility and rapid transfer. [0004] The counterweight is an important component of the truck crane, which is used to balance the working load of the crane, and its weight has a great influence on the stability and lifting performance of the crane. The balance weight of small tonnage cranes generally adopts a fixed structure, but for medium and large tonnage cranes, due to the weig...

AI Technical Summary

Problems solved by technology

The balance weight of small tonnage cranes generally adopts a fixed structure, but for medium and large tonnage cranes, due to the weight of the whole machine and the weight of the bridge core, the weight of the fixed balance weight is limited, which limits the stability and lifting performance of the crane

[0005] see figure 1 , figure 1 It is a schematic diagram of the installation structure of the common crane counterweight in the prior art. The traditional crane counterweight 04 is fixed to the tail of the turntable 01 through the bolt 02 and the nut 03. The stable moment of the crane remains unchanged, and the force on the rear axle of the crane chassis is relatively large. , the performance of the whole machine is affected by the weight of the whole machine

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