A dump truck rollover protection structure and cab rops skeleton

Abstract

The invention discloses a dump truck rollover protection structure and a cab ROPS frame, including an upper mounting seat, a limit structure, a lower mounting seat, a rear connecting beam and a cab ROPS frame. The cab ROPS frame consists of a top bearing beam, a C-pillar , D-pillar, and bottom load-bearing beam form a load-bearing component, and the top C-shaped frame, B-pillar, and bottom C-shaped frame together constitute a functional component; the bottom ends of the C-pillar and D-pillar are fixed on the upper mount, and the C-pillar, D-pillar The column and the upper mounting seat form a triangular structure; the corresponding position on the upper surface of the rear connecting beam is fixed with the lower mounting seat; the corresponding positions of the upper mounting seat and the lower mounting seat are provided with a limit structure for limiting the horizontal rotation of the cab relative to the frame; The ROPS frame of the cab is fixed with the upper mounting base, and the rear connecting beam is fixed with the lower mounting base. Positioning and installation are carried out through the limit structure, and fastened with fixing bolts.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery, and in particular relates to a dump truck rollover protection structure and a cab ROPS framework. Background technique [0002] The cab of construction machinery (large mining dump truck) mostly uses section steel as the skeleton, which is a commonly used roll-over protective structure (ROPS). The ROPS shall have sufficient strength and stiffness to ensure that it will not fail (strength requirement) or deform excessively (deflection requirement) under continuous lateral, longitudinal and vertical loads, so as to protect the vehicle driver from intrusion damage; and It must have a certain deformation energy absorption capacity (energy absorption requirements) to reduce the impact on the driver. [0003] At the same time, the working environment of construction machinery products is harsh, and the incidence of rollover accidents is higher than that of other vehicles. Therefore, on ...

AI Technical Summary

Problems solved by technology

[0006] The existing technology has the following disadvantages: (1) The existing technology regards the A-pillar as a force transmission path, and in order to ensure sufficient rigidity of the cab, all components on the force transmission path (such as the front connection frame) must be optimized and strengthening, which not only increases the design cycle, but also is not conducive to product weight loss;

[0007] (2) In the anti-rollover safety certification test, the lower end of the column often yields prematurely, resulting in a decrease in the overall strength of the cab, which cannot meet the requirements of the anti-rollover standard. At this time, steel pipes with larger dimensions and thicker pipe walls need to be selected for the column , too thick A-pillar and B-pillar will limit the driver's front and side vision, causing potential safety hazards;

[0008] (3) The huge lateral load will cause the fastening bolts of the cab-frame to be in the harsh working condition of the combination of tension, bending and shearing, and the bolts are prone to breakage

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