Novel vehicle frame and track frame connecting plug plate

Abstract

The invention discloses a novel vehicle frame and track frame connecting plug plate which is characterized in that one end of the plug plate is provided with a step surface which is towards an upper cover plate of a track frame and is in contact with the upper cover plate of the track frame, and the other end of the plug plate is a fixed end capable of being fixedly connected with a vehicle frame.According to the step type plug plate, after the assembly, the plug plate surface is in surface contact with the upper cover plate of the track frame, partial generation of stress concentration is avoided, and the plug plate basically does not abrade; the force transmission between the plug plate and the upper cover plate of the track frame is up-and-down transmission; compared with an inclined plane form plug plate, the novel vehicle frame and track frame connecting plug plate does not generate a component force in the left-right direction, a bolt for fixing the plug plate does not bear shear stress, and the shear risk is greatly reduced; the plug plate is not extruded outwards, and the effect of welling controlling a gap can be achieved well.

Description

technical field [0001] The invention relates to a plug plate connecting a vehicle frame and a crawler frame, and belongs to the technical field of crawler cranes. Background technique [0002] The frame of the telescopic crawler crane plays the role of connecting the upper and the lower. The upper part is connected to the slewing bearing and the turntable, and the lower part is connected to the left and right crawlers. Due to functional requirements, the small-tonnage telescopic crawler crane has a wide-gauge working state and a narrow-gauge working state. The frame 1 and two crawlers Frame 2 adopts a plug-in connection method. There is a gap between frame 1 and track frame 2 in this connection method. If the gap is too large, it will affect the performance of the whole machine. If the gap is too small, assembly will be difficult. Therefore, it is necessary to repair the frame after assembly 1 and the crawler track to control the gap, usually adding a plug plate 3' on the in...

AI Technical Summary

Problems solved by technology

[0004] First, this type of plug plate is in the form of an inclined plane, and the upper cover plate of the track frame is flat. After the plug plate is assembled, the inclined surface of the plug plate is in line contact with the upper cover plate of the track frame, so it is easy to cause the force to concentrate on the On the contact line, the plug plate is prone to serious phenomenon of the inclined surface being gnawed during work;

[0005] Second, in this form of connection, the plug plate will transmit the force back to the place where the two connecting bolts are connected. The bolts are subjected to shear stress, and there is a risk of shearing the bolts;

[0006] Third, the plug plate will be squeezed out after a period of use, which cannot achieve a good effect of controlling the gap

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