Chassis of low-floor trailer body

Abstract

The invention discloses a chassis of a low-floor trailer body. The chassis comprises a bolster, longitudinal beams, side beams and seat support beams, wherein the bolster transversely penetrates through the whole trailer body; the bolster comprises a bolster lower cover plate, a bolster upper cover plate, a bolster side plate, a bolster vertical plate and a bolster support plate; the longitudinal beams are connected to two sides of the middle of the bolster respectively; each longitudinal beam comprises an end beam and a longitudinal beam body and further comprises a longitudinal beam lower cover plate, a longitudinal beam upper cover plate, an end plate, an end cover and a longitudinal beam side plate; the longitudinal beam lower cover plate extends horizontally at the end beam, then obliquely and upwards extends and finally horizontally extends; the longitudinal beam upper cover plate extends horizontally at the end beam, then obliquely and upwards extends and finally horizontally extends; a horizontal plane is taken as a standard, the angle between the obliquely and upwards extending longitudinal beam upper cover plate and the horizontal plane is smaller than the angle between the obliquely and upwards extending longitudinal beam lower cover plate and the horizontal plane, and the cross sections of the obliquely and upwards extending sections of the longitudinal beam upper cover plate and the longitudinal beam lower cover plate are gradually reduced. The chassis structure is light in weight, good in strength and stiffness and most importantly good in force transmission performance.

Description

technical field [0001] The present invention relates to low-floor trailer bodies, and more particularly to low-floor trailer body underframes. Background technique [0002] The trailer body chassis is one of the important parts of the trailer. For the trailer body chassis on the non-power bogie, it bears the weight of the car body and needs to transmit the traction to the non-power bogie. Therefore, the trailer is required The underframe of the car body has certain strength and rigidity, and requires better force transmission performance. [0003] A 100% modern urban tram car body underframe is disclosed in the patent literature with the application date of CN104015745A being 2014.6.27 and the publication date being 2014.9.3. , the first end beam, the second end beam, the first side beam, and the second side beam, the corbel is welded into a closed "bow" box shape, and the longitudinal beam is welded into a closed box structure, through which the whole body. The corbels, ...

AI Technical Summary

Problems solved by technology

Although the car body chassis with this structure has many advantages, (1) for the corbel, the vertical force at both ends is relatively small. It is troublesome, and it increases the weight of the entire car body chassis, thereby increasing the traction capacity and increasing energy consumption; (2) Since the longitudinal beam runs through the entire car body, the longitudinal length of the car body chassis is far Much larger than the transverse length, therefore, the entire longitudinal beam is prone to bending deformation when carrying the car body or hoisting; (3) The force transmission performance of the car body chassis with the above structure is not good

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