Mining dump truck lifting seat

Abstract

The invention provides a mining dump truck lifting seat. The mining dump truck lifting seat comprises a left longitudinal beam, a right longitudinal beam, a left lifting arc plate and a right liftingarc plate. The left longitudinal beam and the right longitudinal beam are arranged at the bottom of a carriage, and the rear ends of the left longitudinal beam and the right longitudinal beam are hinged to the carriage. The left lifting arc plate and the right lifting arc plate are fixedly mounted at the bottoms of the left longitudinal beam and the right longitudinal beam correspondingly. The left lifting arc plate and the right lifting arc plate are of the same structure integrally machined and formed by a whole steel plate, the bottom of the left lifting arc plate and the bottom of the right lifting arc plate are fixedly connected to the two ends of a middle pipe respectively, and lifting fixing bases are fixedly arranged at the two ends of the middle pipe respectively. A lifting fixingpin shaft used for being hinged to a lifting oil cylinder is arranged in an axial inner hole of each lifting fixing base. The mining dump truck lifting seat is simple and light in structure, abrupt change of the cross sections of the longitudinal beams can be reduced, stress concentration points are removed, and unbalance loading in the lifting process is avoided.

Description

technical field [0001] The invention relates to the technical field of mining machinery, in particular to a lifting seat for a mining dump truck. Background technique [0002] At present, mining dump trucks are used as the main transportation equipment for open-pit mining, and are mainly used for ore transportation and self-unloading. As the lower fulcrum of the lifting cylinder, the lifting support plays an important role in the working links of material transfer, transportation, and unloading of mining dump trucks. Since the lifting support is the main work load-bearing part, various manufacturers often design it cumbersomely, and generally adopt a box-shaped structure, which is welded to the bottom of the frame longitudinal beam. Due to the large cross-section and high rigidity of the lifting seat of the box structure, it is easy to cause a sudden change in the section of the frame longitudinal beam at the position where the lifting seat is welded. Although various manuf...

AI Technical Summary

Problems solved by technology

Although this improved structure solves the problems of bulky overall weight of the lift cylinder support and the problem of weld cracking, there are still the following problems: the box-shaped seat structure is still used, and the weight is relatively large; the longitudinal beam is connected between the box-shaped seat body and the longitudinal The sudden change in stiffness at the straight edge where the beam contacts is still large and the stress is large; the welding seam at the arc-shaped block is complicated, resulting in a new stress concentration point; the four sharp points of the quadrilateral where the box-shaped seat body contacts the longitudinal beam are still There is a problem of stress concentration; the lifting process still has the problem of partial load on the inner and outer surfaces of the box-shaped seat; the structure is more complicated and the manufacturing cost is higher

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