Combined counterweight device and crane using same

Abstract

The invention discloses a combined counterweight device and a crane using the same and aims to solve a problem that the prior counterweight device cannot move backwards and forwards. The combined counterweight device of the invention comprises a counterweight body, two horizontal slide rails, a counterweight bracket, two vertical oil cylinders and two horizontal oil cylinders, wherein the vertical oil cylinders are fixed on the counterweight bracket through the two vertical oil cylinders, and the counterweight bracket can slide backwards and forwards along the horizontal slide rails fixedly arranged on two sides of the tail part of a turntable under the action of the two horizontal oil cylinders. The key design points of the combined counterweight device and the crane using the same include: the counterweight body can move backwards and forwards to effectively improve the length of the big arm and the vehicle stability under a large amplitude working condition of the crane and to reduce the vehicle length to impact the structure of the crane respectively; and at the same time, the crane has a relatively small radius when driving on a curve, so the rideability of the crane is greatly improved.

Description

technical field [0001] The invention relates to hoisting machinery technology, in particular to a combined balance weight device and a crane using the device. Background technique [0002] At present, all cranes are equipped with counterweights, which act as reverse levers during the hoisting process to prevent the accident of the crane tipping over during the hoisting process. There are generally two types of counterweights used in wheeled cranes: fixed counterweights and combined counterweights. Compared with the fixed balance weight, the combined balance weight is composed of several independent balance weights. When combined into different weights, the thickness is different. Each combination needs to be relatively positioned and fixed to ensure that the balance weight It can be used safely and reliably, and then exert the lifting performance under the large lifting arm. [0003] With the development of large-tonnage cranes, the requirements for the whole vehicle are b...

AI Technical Summary

Problems solved by technology

[0004] However, relative to the car body, the position of the balance weight of the self-topping balance weight device is fixed in the front and rear directions, that is to say, in any working condition, the balance weight is at the length of the boom, and the lifting weight is substantially lower. Therefore, there is a problem that the length of the whole machine is too long in the non-lifting state

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