Movable crane and balance weight connecting device thereof

Abstract

The invention discloses a balance weight connecting device of a movable crane, which comprises a bearing cylinder and a connecting assembly, wherein the bearing cylinder and the connecting assembly are connected with a balance weight and a rotary table of the movable crane, the axes of the bearing cylinder is parallel to the center line of the rotary table, the connecting assembly is fixedly connected with the axial outer wall of the bearing cylinder and the rotary table, i.e. the rotary table is horizontally connected with the bearing cylinder, thus the movable crane can be designed more compactly so as to greatly reduce an arm of force that the balance weight can be transferred through the bearing cylinder and ensure that the reliability and the safety of the movable crane are remarkably improved. In addition, the bearing cylinder is connected with the side surface of the rotary table, thus an installing support can be not arranged on the side surface of the rotary table, the structure of connecting the balance weight with the rotary table can be simplified, the structure of the movable crane is simpler, and the large development space of the movable crane is enlarged. The invention also provides a movable crane comprising the balance weight connecting device.

Description

technical field [0001] The invention relates to the field of balance weights of cranes, in particular to a balance weight connection device for mobile cranes. In addition, the present invention also relates to a mobile crane comprising the above-mentioned counterweight connecting device. Background technique [0002] With the research and development of large-tonnage cranes, users' demand for economy and practicability is becoming more and more prominent. For the user, on the premise of not losing the lifting performance, the lighter the crane in the driving state, it directly means the reduction of its use cost. Because the weight of the crane becomes lighter, tolls and fuel consumption during driving can be reduced, which can bring considerable economic benefits to the enterprise. Therefore, how to reduce the weight of the crane is a major research direction of mechanical design. [0003] The balance weight has always been an indispensable part of the mobile crane to ma...

AI Technical Summary

Problems solved by technology

[0007] 1) It is necessary to install the balance heavy oil cylinder 12 and the installation support 15 for transmitting torque, which increases the inherent weight of the crane, and the weight of the installation support 15 increases with the increase of the weight of the balance weight 11. With the continuous development of large-scale cranes, The weight of the mounting support 15 has become a burden that cannot be ignored;

[0008] 2) Installing the support 15 increases the lateral dimension of the turntable 13, resulting in a larger force arm of the counterweight 11 and poor structural safety;

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