Counterweight device of crane and crane with counterweight device

Abstract

The invention discloses a counterweight device of a crane and the crane with the counterweight device. The counterweight device of the crane comprises: a counterweight; a first guide rail, which is installed on the main body of the crane in a movable manner, used for supporting the counterweight and guiding the counterweight to move along the first guide rail, and capable of moving in a forward inclining state or in a backward inclining state, wherein in the forward inclining state, the counterweight moves forward along the first guide rail under the action of the gravity of the counterweight, and in the backward inclining state, the counterweight moves backward along the first guide rail under the action of the gravity of the counterweight; and a first drive unit, which is used for driving the first guide rail to move in the forward inclining state or in the backward inclining state. Since the guide rail which is capable of inclining forward and backward, the counterweight can move forward and backward along the first guide rail under the action of the gravity of the counterweight so as to adapt to different working states. In a lifting state, the counterweight moves backward, and maximum lifting weight is increased; and in a zero load state, the counterweight moves forward, and the center distribution of the whole crane is uniform, which enables the stability of the crane to be improved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a crane counterweight device and a crane with the same. Background technique [0002] In the prior art, the crane counterweight is usually directly and fixedly installed on the crane main body. The position of the counterweight is a fixed point. If the counterpoint is placed back, the lifting weight can be increased, but when the crane is empty, the center of gravity of the whole machine will be too far behind, which will become an unstable factor for the crane. [0003] figure 1 A truck crane with fixed counterweight is shown. In the case of a certain counterweight mass, in order to maximize the lifting capacity, generally the position of the counterweight 2' is placed as far back as possible. But in this way, during the driving process of the truck crane, the axle load of the rear axle 3' of the truck crane (the rear axle is the rear support point in the drivi...

AI Technical Summary

Problems solved by technology

But in this way, during the driving process of the truck crane, the axle load of the rear axle 3' of the truck crane (the rear axle is the rear support point in the driving state) will be larger, while the axle load of the front axle of the truck crane will be smaller, and the axle load of the front and rear axles will be larger. Uneven distribution affects the safety of truck cranes during driving

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