Crane and frame thereof

Abstract

The invention provides a frame. The frame comprises a rear frame section (13), wherein the end part of the rear frame section (13) is connected with a fixed supporting leg (11); the fixed supporting leg (11) comprises an outer vertical plate (111), a middle vertical plate (113) and an inner vertical plate (113) which are arranged in parallel; grooves (114) are formed on the outer vertical plate (111), the middle vertical plate (113) and the inner vertical plate (113); vertical plate cover boards (115) are arranged among the grooves (114); the rear frame section (13) is embedded into the grooves (114); the top ends of the grooves (114) are level with an upper cover board (134) of the rear frame section (13); and a lower cover board of the rear frame section (13) is in butt joint with the vertical plate cover boards (115). The frame has the advantages of high carrying capacity and high stability. In addition, the invention also provides a crane with the frame.

Description

technical field [0001] The invention relates to the technical field of vehicle frame connection, in particular to a vehicle frame. In addition, the present invention also relates to a crane with the above-mentioned vehicle frame. Background technique [0002] At present, with the rapid development of the economy, large-scale projects continue to increase. The scale of construction projects in wind power, thermal power, nuclear power and other energy industries continues to expand, and hoisting projects are developing in the direction of large-scale and large-scale. [0003] The frame of the crane is the main load-bearing structure for the crane to get off the car. The frame includes the rear section of the frame and fixed legs. On small and medium tonnage cranes, the rear section of the frame and the fixed outrigger are mainly connected by lap joints. The frame bears various loads of the crane and finally transmits them to the ground through the outrigger device. [0004...

AI Technical Summary

Problems solved by technology

[0006] In the frame of the above-mentioned connection form, the box-shaped structure of the fixed leg 3 itself is relatively small, the moment of inertia of the section is small, and the stress is relatively large when subjected to external loads, so the bearing capacity is limited

At the same time, the two oblique supports are arranged asymmetrically. When the crane is subjected to loads under different working conditions, the force on one leg of the crane changes greatly, which is prone to stress concentration. It needs to be fixed by welding and other connection methods. The entire frame is composed of multiple overlapping parts, and there is still a defect of instability.

In summary, the frame with this connection structure has low load-carrying capacity and poor stability.

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