Double-layer chassis frame structure of light-weight middle-sized bus

Abstract

The invention discloses a double-layer chassis frame structure of a light-weight middle-sized bus. The structure comprises a double-longitudinal-beam chassis frame, the front portion of the double-longitudinal-beam chassis frame is connected with a front-portion chassis, the rear portion of the double-longitudinal-beam chassis frame is connected with a rear-portion chassis, and the middle of the double-longitudinal-beam chassis frame is connected with a double-layer middle chassis. The double-layer middle frame comprises an upper-layer middle chassis and a lower-layer middle chassis, the upper-layer middle chassis and the lower-layer middle chassis are both formed by connecting a plurality of vertical beams and a plurality of cross beams in a joggling mode, and the double-layer middle chassis is fixed to the middle of the double-longitudinal-beam chassis frame through supporting columns. The vertical beams and the cross beams are all section-bar beams. A battery interlayer for containing a drive battery is reserved inside the double-layer middle chassis, and the upper surface of the front-portion chassis, the upper surface of the rear-portion chassis and the upper surface of the upper-layer middle chassis are arranged in the same plane, so that the surface of the chassis frame is more flat, and seats are arranged more conveniently. The double-layer chassis frame structure can follow the design of an existing single-layer steel structure double-longitudinal-beam chassis frame, a steel-aluminum mixing structure is adopted to form the double-layer chassis frame, and the universality of the double-layer chassis frame is enhanced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a double-layer chassis frame structure of a lightweight minibus. Background technique [0002] Whether it is a traditional car or a new energy vehicle, the lightweight of the body has become a research hotspot, but for electric vehicles, the significance of lightweight is greater, and the requirements for lightweight are higher. In order to achieve a significant lightweight effect, it is necessary to find new solutions in terms of materials, structures and manufacturing processes. [0003] Most minibuses adopt a double vertical beam chassis load-bearing structure, and a series of installation points are arranged on the vertical beams to install chassis components and compartments. Therefore, the two vertical beams are not only the installation base, but also the main force-bearing structural parts. Minibuses in the prior art are generally designed as an all-steel single-laye...

AI Technical Summary

Problems solved by technology

Minibuses in the prior art are generally designed as an all-steel single-layer chassis, which is not suitable for electric minibuses driven by new energy, because the chassis is not convenient for accommodating batteries, and additional space for accommodating batteries is required. Occupies the position of the chassis

[0004] And because various components are installed on the chassis of the car, the vertical beams have a complex spatial shape. Viewed horizontally from the side, the middle of the vertical beams is at the lowest position, and the front and rear parts are raised, especially the rear part. Causes the upper surface of the chassis frame to be uneven

It can be seen that the existing double-vertical beam chassis structure is relatively complicated, and its own weight is relatively heavy, which is not conducive to the lightweight design of the vehicle, especially not suitable for lightweight electric buses

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