CN-115520281-B - Connecting structure for chassis cross beam and side wall stamping part of passenger car and assembling method thereof

Abstract

The invention discloses a connecting structure of a bus chassis cross beam and a side wall stamping part and an assembly method thereof. The connecting structure for the cross beam and the side wall stamping parts of the chassis of the passenger car comprises a floor framework assembly, a side wall framework assembly and a chassis assembly. The floor frame assembly includes a floor cross member and a cross plate support frame. The cross plate support frame comprises a first connecting part and a second connecting part. The first connecting part is fixedly connected with the bottom of the floor beam. The side wall skeleton assembly comprises a side wall upright post and an upright post inner plate. One side of the upright post inner plate is fixed on the side wall upright post, and the other side is fixedly connected with the floor cross beam. The chassis assembly includes a reinforcing diagonal brace, a chassis cross member, and a chassis upright. The chassis crossbeam fixed mounting is in the floor crossbeam bottom, and chassis stand fixed mounting is in chassis crossbeam bottom, and the enhancement bracing sets up between chassis stand and stand inner panel. The structure of the invention effectively solves the problem that the original stamping side wall skeleton cannot be reliably connected with the square pipe floor skeleton and the underframe.

Inventors

• LI YUGE
• JIN BO

Assignees

• 安徽安凯汽车股份有限公司

Dates

Publication Date

20260505

Application Date

20221031

Claims (2)

1. 1. The utility model provides a passenger train chassis crossbeam and side wall stamping workpiece connection structure which characterized in that includes: the floor framework assembly comprises a floor beam (1) and a transverse plate support frame, wherein the transverse plate support frame comprises a first connecting part and a second connecting part; The side wall skeleton assembly comprises a side wall upright post (3) and an upright post inner plate (4), wherein one side of the upright post inner plate (4) is fixed on the side wall upright post (3), the other side of the upright post inner plate is fixedly connected with the floor beam (1), a second connecting part is fixedly connected with the upright post inner plate (4), and The chassis assembly comprises a reinforcing diagonal brace (5), a chassis cross beam (6) and a chassis upright post (7), wherein the chassis cross beam (6) is fixedly arranged at the bottom of the floor cross beam (1), the chassis upright post (7) is fixedly arranged at the bottom of the chassis cross beam (6), and the reinforcing diagonal brace (5) is arranged between the chassis upright post (7) and the upright post inner plate (4); The first connecting part and the second connecting part are integrally formed pieces; The side wall of the side wall upright post (3) is inwards sunken with a mounting groove, the upright post inner plate (4) is welded in the mounting groove, and the upright post inner plate (4) is completely attached to the groove wall of the mounting groove; the floor beam (1), the underframe upright post (7) and the underframe beam (6) are all formed by welding square pipes.
2. 2. An assembly method of a connecting structure of a cross beam of a passenger car underframe and a side wall stamping part is characterized in that the assembly method is used for the connecting structure of the cross beam of the passenger car underframe and the side wall stamping part, and comprises the following steps: Fixing the upright post inner plate (4) on the side wall upright post (3) in a welding mode; fixing the underframe cross beam (6) with the upright post inner plate (4) in a welding mode, welding a first connecting part of the cross beam support (2) below the underframe cross beam (6), and welding a second connecting part of the cross beam support (2) with the upright post inner plate (4); and after the positioning of the underframe cross beam (6) and the floor cross beam (1) is finished, welding is carried out, and then the reinforcing diagonal bracing (5) is placed between the underframe upright post (7) and the upright post inner plate (4) for welding and fixing.

Description

Connecting structure for chassis cross beam and side wall stamping part of passenger car and assembling method thereof Technical Field The invention relates to the technical field of parts of buses, in particular to a connecting structure of a bus chassis cross beam and a side wall stamping part and an assembly method thereof. Background At present, the side wall and the underframe of the conventional passenger car mostly adopt a stamping part-to-stamping part structure or a square pipe part-to-square pipe part structure, and the strength of the car body after the same part structure is welded can be reliably ensured. Part of passenger cars also adopt square tube floors to punch side wall structures, but because of the unreliability of the structures, the strength of the car body is insufficient, the durability is poor, the problem of car body cracking exists, and the problem of car body cracking cannot be effectively solved. Disclosure of Invention The invention aims to provide a connecting structure for a cross beam of a passenger car underframe and a side wall stamping part and an assembly method thereof. The technical problems solved by the invention are as follows: At present, some buses adopt square tube floors to punch side wall structures, the structures are unreliable, the strength of the buses is insufficient, the durability is poor, and the cracking problem of the buses exists. The aim of the invention can be achieved by the following technical scheme: A connecting structure of a cross beam and a side wall stamping part of a passenger car underframe comprises a floor framework assembly, a side wall framework assembly and an underframe assembly. The floor frame assembly includes a floor cross member and a cross plate support frame. The cross plate support frame comprises a first connecting part and a second connecting part. The first connecting part is fixedly connected with the bottom of the floor beam. The side wall skeleton assembly comprises a side wall upright post and an upright post inner plate. One side of the upright post inner plate is fixed on the side wall upright post, and the other side is fixedly connected with the floor cross beam. Wherein, second connecting portion and stand inner panel fixed connection. The chassis assembly includes a reinforcing diagonal brace, a chassis cross member, and a chassis upright. The chassis crossbeam fixed mounting is in the floor crossbeam bottom, and chassis stand fixed mounting is in chassis crossbeam bottom, and the enhancement bracing sets up between chassis stand and stand inner panel. As a further proposal of the invention, the first connecting part and the second connecting part are integrated into a whole. As a further scheme of the invention, the side wall of the side wall upright post is inwards sunken with a mounting groove. The column inner plate is welded in the mounting groove, and the column inner plate is completely attached to the groove wall of the mounting groove. As a further scheme of the invention, the floor beam, the underframe upright post and the underframe beam are all formed by welding square tubes. The invention also discloses an assembly method of the connecting structure of the chassis cross beam and the side wall stamping part of the passenger car, which comprises the following steps: And fixing the upright post inner plate on the side wall upright post in a welding mode. The underframe beam is fixed with the upright post inner plate in a welding mode, a first connecting part of a beam supporting piece is welded below the underframe beam, and a second connecting part of the beam supporting piece is welded with the upright post inner plate. And welding after the positioning of the underframe cross beam and the floor cross beam is finished, and then placing the reinforcing diagonal bracing between the underframe upright post and the upright post inner plate for welding and fixing. The invention has the beneficial effects that: According to the connecting structure of the chassis cross beam and the side wall stamping parts of the passenger car, through structural design of the floor framework and the chassis and adaptive adjustment of the existing side wall framework, the floor framework and the chassis in square tube form are reliably welded with the side wall framework after stamping, and an important structural part of the car body is formed. The problem that the original stamping side wall framework cannot be reliably connected with the square pipe floor framework and the underframe is effectively solved, a reliable and low-cost development mode is provided for the adaptive development of the stamping car body, and the development scheme of the passenger car product is enriched. Drawings The invention is further described below with reference to the accompanying drawings. Fig. 1 is a schematic diagram of the overall structure of the present invention. FIG. 2 is a schematic view of a floor frame assembly of the present