Aluminum alloy whole-assembly type beam-free bottom structure

Abstract

The invention discloses an aluminum alloy whole-assembly type beam-free bottom structure which comprises stringers, floor units, T-shaped bolts, hook pressure plates and angular connecting pieces. The floor units which are spliced longitudinally are directly spread on the stringers, floor unit end flange structures are designed at one ends of the floor units, floor unit end T-shaped grooves are fittingly arranged in other ends of the floor units, and the floor unit end T-shaped grooves are connected with the stringers through the T-shaped bolts and the angular connecting pieces fixedly connected on ventral sides of the grinders. An original 'stringers-beam-floor' three-overlaying structure is modified into a 'stringers-floor' two-overlaying structure, the beam is omitted, and more than 20% of the weight is reduced; through the T-shaped groove structure at the splicing points of the floor units, the floor and the stringers are connected through an assembly type structure adopting the bolts, investment of a welding fixture and equipment is not needed, impact on environment is reduced, and production efficiency is increased by more than 20%.

Description

technical field [0001] The invention belongs to the field of logistics equipment and relates to a fully assembled bottom plate structure of a carriage without a beam. Background technique [0002] The floor assembly is a component that accounts for 40%-50% of the weight of the carriage assembly. It is made of aluminum alloy instead of steel, which has an obvious weight-saving effect. Among similar products on the market, the three-layer superimposed structure of longitudinal beams + beams + floors is basically adopted, with a total height of 250-300mm, and the floor units, floor and beams are all connected by welding. [0003] The existing bottom plate is composed of three layers of longitudinal, beam and floor, with a total height of ≥250mm, and the floor, beam and floor units are connected by welding. The bottom plate is stacked in three layers, with heavy weight and elevated center of gravity of the vehicle; in order to ensure waterproofness, the floor unit is mostly ful...

AI Technical Summary

Problems solved by technology

The bottom plate is stacked in three layers, with heavy weight and elevated center of gravity of the vehicle; in order to ensure waterproofness, the floor unit is mostly fully welded, which is extremely inefficient and requires large-scale automatic welding equipment, which has a great impact on the strength of the material. At the same time, the floor unit In order to meet the needs of mutual welding and welding with the beam, the thickness of the profile cannot be reduced, which limits the further improvement of the lightweight effect

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