Mining dump truck frame with load level of 300 tons

Abstract

The invention discloses a mining dump truck frame with the load level of 300 tons. The mining dump truck frame comprises a bumper assembly, a front cross beam, a right front suspension support, an upper portal beam, a tail seat assembly, a middle jacking assembly, a left front suspension support, a lower portal beam and two sets of longitudinal beams. The left set of longitudinal beams and the right set of longitudinal beams are parallel to a center plane of a whole truck and are symmetrically arranged with the front portions wider than the rear portions. The position from the front cross beam to the rear portion is a main bearing structure of the whole truck frame. A variable-section box type structure formed by welding high-strength steel and steel castings is adopted in each of the two sets of longitudinal beams. In the height direction, the front portions and the rear portions of the longitudinal beam sections of the two sets of longitudinal beams are narrower than the middle portions, and the section of the position of the jacking assembly at the middle portion of the truck frame is the largest. The steel castings are adopted in the mining dump truck frame on a large scale, relatively large bending loads, torsion loads and impact loads can be borne, stress concentration of a stress concentrating region is reduced, the situation that welding joints are formed in a high-stress region is avoided, and the anti-fatigue performance of the truck frame is improved.

Description

technical field [0001] The invention relates to a mining dump truck frame, in particular to a 300-ton mining dump truck frame, which belongs to the field of mining equipment. Background technique [0002] Mining dump truck is a professional vehicle used for ore or earthwork transportation in open-pit mining and large-scale earthwork construction. It has the characteristics of heavy load and high work efficiency. At present, mining dump trucks are developing in the direction of large-scale and gigantic, with a load capacity of more than 300t and a vehicle weight of more than 600t. The frame of the mining dump truck is a super-large structural part, which is the base for the whole vehicle to be loaded, supported and installed. It is the most important structural component of the mining dump truck and will accompany the entire life cycle of the dump truck. During the operation of the vehicle, the frame bears the effects of gravity, impact load, torsional load, bending load and...

AI Technical Summary

Problems solved by technology

The frame is mainly welded by steel plates, and steel castings are only used locally, which is difficult to meet the strength and rigidity required for the frame of a dump truck with a load of more than 300 tons

Moreover, the existing dump truck frame structure is prone to fatigue cracks in high stress areas and weld joints, leading to premature failure of the frame

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