Rear double-bridge cross-beam structure of a mining vehicle frame

Abstract

The invention discloses a mining dump truck frame rear double axle beam structure which comprises a box-type beam assembly, longitudinal beams and a lower box welding assembly. Extension backing plates are arranged between the longitudinal beams and balance shaft support base assemblies. The box-type beam assembly and the lower box welding assembly are of a box-type structure. The inventor performs finite element analysis on a frame, the extension backing plates (24) are additionally arranged at the connecting positions between the large-stress lower portions of the longitudinal beams and the balance shaft support base assemblies (2), so that stress of the points is effectively reduced, the positions are weak links of the frame, transverse resistance strength of the frame and rigidity of the longitudinal beams are greatly improved, stress distribution is improved, rupturing and distortion are prevented, safety and reliability are improved, and the mining dump truck frame rear double axle beam structure is suitable for mining working conditions and convenient to maintain, only needs to perform welding if snapping happens and is more stable in structure because the longitudinal beam assemblies and all the beam assembly are of a box-type structure. The structure and technology are simple, strength is high, and service life is long.

Description

technical field [0001] The invention belongs to the field of mining dump trucks, in particular to a rear double-bridge beam structure of a mining vehicle frame. Background technique [0002] Dump trucks include heavy-duty dump trucks and light-duty dump trucks. Generally, heavy-duty dump trucks are used in mining areas, and they can also be called large-scale mining dump trucks. This kind of dump trucks often encounter uneven, round or round mine roads. The phenomenon of multiple wheels riding high or sinking, the frame is subjected to irregular distortion and deformation, and the force passes through the frame. After the double bridge beam repeatedly acts on the front and rear edges of the frame, the rear edge will break due to stress concentration over time, and in the early stage In order to take the replaceability into consideration in the design of the mining car, some key parts are often connected by bolts. The bolts are easy to loosen and be sheared in the harsh e...

AI Technical Summary

Problems solved by technology

The other is a box-type structure welded as a whole; after actual research, various types of frames have their own advantages and disadvantages. By collecting the actual operating faults of frames of various structures, it is found that during the operation of the whole vehicle, due to the unevenness of the road surface in the mining area Unevenness, the frame is subjected to high-strength distortion and impact, often causing fracture and distortion, mainly due to loose bolts or shear fracture at the bolted part, and fatigue fracture at the front and rear edges of the rear double bridge beam and longitudinal beam connection of the frame , which seriously affects the safety of the vehicle. For each middle beam and longitudinal beam, the problem should be very prominent

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