Motor bus unitary body with large-sized rectangular tube underframe

Abstract

The invention relates to a motor coach unitary body of a large rectangular pipe under frame, which comprises the under frame, an upper part body frame connected with the under frame and a coping, and a floor bracket arranged on the under frame; wherein, the under frame consists of a front overhang, a front axle, a front wheel casing, a middle section, a rear axle, a rear wheel casing and a rear overhang which are sequentially connected with each other; the upper part body frame comprises a front and a rear circles as well as a left side and a right side circles; the under frame is connected with the front and the rear circles as well as the left side and the right side circles of bodywork and the coping by connecting points to form a whole carrying framework, so that a plurality of closed stress ring structures are formed. The invention has the characteristics of strong collision-resistant and side rollover resistant capability, low cost, light weight, high adaptability, good safety, etc.

Description

technical field [0001] The invention relates to a vehicle body, in particular to a fully loaded body of a bus with a large rectangular tube underframe. Background technique [0002] At present, there are three types of full load-bearing body of buses according to the chassis structure: one is a truss-type underframe welded by small rectangular tubes, called a truss-type full load-bearing; Shaped girder, the center is a truss type luggage compartment, and the third is the underframe type full load-bearing body of the large rectangular tube of the present invention. [0003] At present, the truss-type full load-bearing body of the existing domestic bus is all imported technology, which is the result of reverse development. Ankai introduced a full load-bearing body from Keith Bauer, which has obtained the invention patent on July 23, 2008. Patent No.: ZL2006100863514, the main problem of the truss-type full load-bearing body is: because the underframe is a grid structure compo...

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Problems solved by technology

[0003] At present, the truss-type full load-bearing body of the existing domestic bus is all imported technology, which is the result of reverse development. Ankai introduced a full load-bearing body from Keith Bauer, which has obtained the invention patent on July 23, 2008. Patent No.: ZL2006100863514, the main problem of the truss-type full load-bearing body is: because the underframe is a grid structure composed of small rectangular tubes, the process is complicated, the investment in tooling is large, the production process of the enterprise must be adjusted significantly, and the welding workload in the production process is huge , low production efficiency, increased cost, more suitable for luxury buses, high-grade European buses, small production batches, expensive prices, truss-type full load is suitable for them, but it is difficult to popularize and promote in China

[0004]The three-section underframe is a by-product of th

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