Back lower protection device, protection cross beam thereof and reinforcement method thereof

Abstract

The invention discloses a back lower protection device, a protection cross beam thereof and a reinforcement method thereof; and a triangular section structure (2) is formed on the cross section of the protection cross beam (1). The reinforcement method comprises connecting a reinforcing plate to a cross beam body of the protection cross beam so as to form the triangular section structure on the cross section of the protection cross beam. As the triangular section structure is formed on the cross section of the protection cross beam, the structural strength and the stability of the protection cross beam can be effectively enhanced through the triangular stability.

Description

technical field [0001] The invention relates to the reinforcement field of a rear lower protection device, in particular to a rear lower protection device, a protective crossbeam, and a strengthening method for the protective crossbeam. Background technique [0002] At present, with the rapid development of the automobile industry, the safety performance of vehicles has become the focus of increasing attention, especially the rear-end collision between cars and trucks is an important aspect of the crisis occupant safety. In order to improve the safety of road traffic, the National Standards Committee further revised GB 11567.2-2011 "Requirements for the rear lower protection of automobiles and trailers" in 2011, strengthening the technical requirements for the rear lower protection of commercial vehicles. [0003] How to solve the collision safety compatibility problem of car and truck rear-end collision is an important topic in the current collision safety development and d...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the protective beams of the existing rear lower protective devices are non-closed structures, which have poor bending and torsion resistance. In order to meet the requirements of collision safety performance, the thickness of the structural material has to be increased, and double-layer C-shaped plates are used for lamination. Forming C-shaped steel or square tube structure by means of methods, but the effect is not significant, but further increases the cost of design and development

Therefore, the popularization of the rear lower protective device of the existing models is limited, and the qualified rate of replacement of the damaged protective device is low, and rarely reaches the standard, causing serious safety hazards to road traffic

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