Combination beam used for vehicle frame, middle segment vehicle frame and vehicle employing combination beam

Abstract

The invention relates to a combination beam used for a vehicle frame, a middle segment vehicle frame and vehicle employing the combination beam. The combination beam used for the vehicle frame includes a longitudinal beam and a seal board having an irregular structure. The seal board is provided with a concave ground board support step used for mounting a middle ground board of a concave ground board of a vehicle. A middle ground board support face used for supporting the edge part of the middle ground board is formed on the step face of the concave ground board support step. The longitudinalbeam is provided with a seat mounting structure used for mounting a seat mounting rack. The lower end of the seal board is provided with a first welding face welded to a cross beam in the middle partof the vehicle frame. The longitudinal beam is provided with a second welding face welded to a cross beam on a side of the vehicle frame. With the use of the combination beam, a plurality of rectangular shaped tubes in the prior art are saved; the seal board can realize an effect of supporting the ground board and also realize an effect of sealing a vehicle body. Besides, the use quantity of the components and parts is reduced, the welding load is small, the middle segment vehicle frame welding precision is improved and production efficiency is improved substantially.

Description

technical field [0001] The invention relates to the field of vehicle body structures, in particular to a composite beam for a vehicle frame, a middle frame and a vehicle using the composite beam. Background technique [0002] At present, the mid-section frame of concave-floor buses mostly adopts the tailor-welded structure of rectangular tube profiles, which is mainly composed of rectangular tube profiles through welding, and then the support beams are welded outside the rectangular tube profiles to form the mid-section frame. [0003] For example, a Chinese utility model patent with the authorized announcement number CN 202345794 U discloses a passenger car body, which includes front-end frame, middle-section frame and rear-end frame connected in sequence, and the middle-section frame includes left and right sides, chassis frame and Floor frame, the floor frame is a concave floor frame for the concave floor, the middle section of the frame is a full load-bearing body struct...

AI Technical Summary

Problems solved by technology

[0003] For example, a Chinese utility model patent with the authorized announcement number CN 202345794 U discloses a passenger car body, which includes front-end frame, middle-section frame and rear-end frame connected in sequence, and the middle-section frame includes left and right sides, chassis frame and Floor frame, the floor frame is a concave floor frame for the concave floor, the middle section of the frame is a full load-bearing body structure welded by rectangular pipe profiles, the concave floor frame includes the middle beam of the frame for the middle floor of the concave floor, The frame side beams used for installation on both sides of the concave floor and the vertical columns of the frame connecting the supporting frame middle beams and the frame side beams, the frame side beams are used to connect with the left and right sides of the vehicle. The two ends of the middle cross beam of the frame are connected with the corresponding upright columns of the frame. The frame with this structure has simple processing and a small investment in a single tooling. It is time-consuming and not suitable for mass production; secondly, the integration degree of the original structure is low, and light weight is not used; at the same time, the plane welding precision on the frame is low, and the overall deviation is large. Because the bamboo floor is laid on the middle frame, the overall size deviation is large. The abnormal sound problem caused by the suspended installation of the bamboo floor and the poor surface flatness of the floor leather are caused.

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