CN103085887A - Side wall vertical pillar structure of variable-cross-section passenger car - Google Patents

Abstract

The invention relates to the technical field of passenger car safety protection, in particular to a variable cross-section stamping and welding passenger car side wall column structure which can significantly improve the rollover safety performance of the passenger car. It is welded by two parts, the outer plate structure (6) and the U-shaped inner plate structure (7). The width of the outer plate structure (6) from the top longitudinal beam (2) to the window waist beam (3) is the same, and the window waist beam Between (3) and the lower waist beam (5), its width gradually increases from top to bottom; the section size of the U-shaped inner plate structure (7) gradually increases from top to bottom along the length direction of the column, and the U-shaped inner plate structure ( 7) The size and width of each section are smaller than the section width of the outer plate structure (6) at the same section position, and there is a welding overlap area of equal width at the connection between the U-shaped inner plate structure (7) and the outer plate structure (6). The invention can ensure that the collision moment of the side column of the bus body matches the cross-sectional size of the column during the rollover process of the bus, makes the denaturation of the side column more uniform, and improves the rollover safety performance of the bus.

Description

A column structure for the side wall of a passenger car with variable cross-section

technical field

The invention relates to the technical field of passenger car safety protection, in particular to a variable cross-section stamping and welding passenger car side wall column structure which can significantly improve the rollover safety performance of the passenger car.

technical background

With the rapid development of public transportation, passenger cars have become the most mainstream public transportation means in today's society, which has also caused various passenger car traffic accidents, among which rollover is one of the most serious traffic accidents of passenger cars, which is likely to cause mass death Therefore, how to minimize the damage to the driver and passengers during the rollover process of the bus and improve the rollover safety performance of the bus has become an urgent problem to be solved.

A large number of documents and simulation results show that in the process of passenger car rollover collision, the closed ring structure of the bus body mainly bears the impact load and absorbs the collision energy, and in the closed ring structure, the side column of the bus is used as the main deformation energy absorption Therefore, the structural design of the side column of the bus directly affects the anti-rollover characteristics of the closed ring, and then affects the rollover safety performance of the whole bus.

When a passenger car rolls over and collides, the top of the side column first comes into contact with the ground, causing the impact moment it bears to gradually increase from top to bottom along the length of the column. From the perspective of theoretical design, in order to ensure uniform deformation of the side pillars and reduce the deformation of the body structure, the cross-sectional size of the side pillars should gradually increase from top to bottom. However, the side column structures of existing passenger cars all use rectangular steel pipes of equal cross-sectional size, resulting in uneven deformation of the side column columns during a rollover collision, and a large amount of intrusion into the side wall structure, which affects the rollover safety performance of the vehicle. .

Contents of the invention

Aiming at the characteristic that the side pillars of the bus are subjected to unequal collision moments during the rollover collision process of the passenger car, the present invention provides a stamping and welding bus side panel with variable cross-section that can match the rollover collision moment on the basis of the existing bus body structure. Column structure.

A variable cross-section stamping and welding passenger car side wall column structure, which is welded by two parts, the outer plate structure 6 and the U-shaped inner plate structure 7, the width of the outer plate structure 6 from the top longitudinal beam 2 to the window waist beam 3 is the same, Between the window waist beam 3 and the lower waist beam 5, its width gradually increases from top to bottom; the section size of the U-shaped inner panel structure 7 gradually increases from top to bottom along the length direction of the column, and the U-shaped inner panel structure 7's cross-section The dimensions and widths are all smaller than the cross-sectional width of the outer plate structure 6 at the same cross-sectional position, and there is a welding overlap area of equal width at the connection between the U-shaped inner plate structure 7 and the outer plate structure 6 .

The outer plate structure 6 has a width of 50-60mm from the top longitudinal beam 2 to the window waist beam 3, a maximum width of 80-100mm from the window waist beam 3 to the lower waist beam 5, and a wall thickness of 3-4mm.

The aspect ratio of the section of the U-shaped inner plate structure 7 is 0.6-0.9, the minimum section size is compared with the maximum section size, the height ratio is 0.4-0.7, the width ratio is 0.4-0.7, and the wall thickness is 3-4mm .

Beneficial effect

The variable cross-section stamping and welding passenger car side column structure proposed by the present invention can ensure that the collision moment of the side column of the bus body matches the cross-sectional size of the column during the rollover process of the bus, making the side column degeneration more uniform, so as to effectively avoid The local instability of the column can improve the energy absorption effect of the structure, achieve the goal of reducing the deformation of the body structure and improving the rollover safety performance of the bus.

Description of drawings

Figure 1 is a schematic diagram of the passenger car rollover specified in the ECE-R66 regulation;

Fig. 2 is a schematic diagram of the installation of the variable cross-section stamping and welding passenger car side wall column structure in the left side wall structure of the passenger car body;

Fig. 3 is a schematic diagram of the installation of the variable cross-section stamping and welding passenger car side wall column structure in the right side wall structure of the passenger car body;

Fig. 4 is an oblique view of the side wall column structure of variable cross-section stamped and welded passenger cars according to the present invention;

Fig. 5 is a front view of the side wall column structure of a stamped and welded passenger car with variable cross-section according to the present invention;

Fig. 6 is a front view of the outer plate structure of the side wall column of a variable cross-section stamped and welded passenger car according to the present invention;

Fig. 7 is a front view of the punched inner plate structure of the side wall column of a variable cross-section stamped and welded passenger car according to the present invention;

Fig. 8 is a cross-sectional schematic diagram of A-A of the side wall column structure of a stamped and welded passenger car with variable cross-section according to the present invention;

Fig. 9 is a schematic diagram of the simulation results of the rollover of the passenger car body section;

Figure 10 is a schematic diagram of the rollover simulation results of the passenger car body section using the variable cross-section stamping and welding passenger car side wall column structure;

Among them, 1. Side column structure, 2. Top longitudinal beam, 3. Window waist beam, 4. Diagonal brace, 5. Lower waist beam, 6. Outer panel structure, 7. U-shaped inner panel structure, 8. Solder points.

Detailed ways

The present invention is described in further detail below in conjunction with the embodiment given with accompanying drawing.

The variable cross-section stamping and welding passenger car side wall column structure 1 is composed of two parts, the outer plate structure 6 and the U-shaped inner plate structure 7, and the two parts are connected by welding process.

The outer panel structure is punched out of sheet metal, and its structural features are: the width of the outer panel structure between the top longitudinal beam 2 and the window waist beam 3 is the same, and the value range is 50-60mm to ensure sufficient side window vision It is convenient to bond with glass; the width of the outer plate structure 6 between the window waist beam 3 and the lower waist beam 5 gradually increases from top to bottom, and the maximum width is 80-100mm, which ensures that it is compatible with the U-shaped inner plate structure 7. A certain welding overlap area is convenient for welding; the wall thickness of the outer plate structure 6 ranges from 3 to 4 mm.

The U-shaped inner plate structure 7 is formed by stamping process. The ratio of height to width of each section ranges from 0.6 to 0.9 (it is stipulated that the depth of the U-shape is the height of the section dimension, and the width of the U-shape is the width of the section dimension). The length direction gradually increases from top to bottom. Compared with the minimum section size and the maximum section size, the height-to-size ratio ranges from 0.4-0.7, the width-to-size ratio ranges from 0.4-0.7; the wall thickness size ranges from 3-4mm The size and width of each section of the U-shaped inner plate structure 7 are smaller than the section width of the outer plate structure 6 at the same cross-sectional position, and ensure that there is an equal-width welding overlap area at the connection between the U-shaped inner plate structure 7 and the outer plate structure 6 .

When installing the side wall column structure of variable cross-section stamping and tailor-welded buses, the outer panel structure faces the outside of the vehicle body, and the stamped inner panel structure faces the inner side of the vehicle body; the window glass is bonded to the outer panel structure by glass adhesive.

As shown in Figures 2 and 3, the present invention selects a relatively mature 12m full load-bearing road passenger car, and replaces its side wall column with the variable cross-section stamping and welding bus side wall column structure proposed by the present invention;

As shown in Figures 4, 5, 6, 7, and 8, the variable cross-section stamping and welding passenger car side wall column structure 1 is composed of two parts: an outer plate structure 6 and a U-shaped inner plate structure 7; the outer plate structure 6 is composed of a plate The width of the outer plate structure between the top longitudinal beam 2 and the window waist beam 3 is the same, and the width value is 60mm, and the width of the outer plate structure between the window waist beam 3 and the lower waist beam 5 gradually increases. The width is 80mm; the thickness of the outer plate structure 6 is 3mm; the U-shaped inner plate structure 7 is formed by stamping process, and its cross-sectional size gradually increases from top to bottom along the length direction of the column, and the minimum cross-sectional size is 30mm*35mm* 3mm (height*width*thickness), the maximum cross-sectional size is 60mm*70mm*3mm (height*width*thickness); U-shaped inner plate structure 7 and outer plate structure 6 have welded overlapping areas of equal width, with a width of 5mm, the U-shaped inner plate structure 7 and the outer plate structure 6 are connected by solder joints 8;

As shown in Figures 2 and 3, when the variable cross-section stamping and welding passenger car side wall column structure 1 is installed, the outer plate structure 6 faces the outside of the body structure, and the U-shaped inner plate structure 7 faces the inside of the body structure; the left and right sides of the bus body The window glass of the right side wall is connected with the outer plate part 6 of the variable cross-section stamping and welding passenger car side wall column structure 1 through an adhesive.

The upper end of the variable cross-section stamping and welding passenger car side wall column structure 1 is connected with the top longitudinal beam structure 2 of the left and right sides of the vehicle body through welding points; the lower end is connected with the lower waist beam structure 5 of the left and right sides of the vehicle body through welding points connected; the window waist beam structure 3 on the left and right sides of the passenger car body, and the part of the diagonal brace 4 between the waist beams and the U-shaped inner plate structure of the variable cross-section stamping and welding passenger car side wall column structure 1 through welding points 7-phase connection;

In order to verify the effectiveness of the present invention, the inventor took a certain type of passenger car as an example, and simultaneously established the original finite element model of the passenger car body section and the vehicle with a variable cross-section stamping and welding passenger car side wall column structure according to the requirements of the ECE-R66 regulation. Figure finite element model. Use LS-Dyna software to carry out simulation analysis, and evaluate the ability of the present invention to improve passenger car rollover safety according to the analysis results, the results are shown in Figures 6 and 7 (the trapezoid in the body section structure is the living space required by regulations). Accompanying drawing 6 is the simulation result of the original body section model of the passenger car, and the shortest distance from the column of the side wall of the passenger car on the collision side to the living space is 24.4 mm; accompanying drawing 7 is the side wall of the passenger car adopting the variable cross-section stamping and welding proposed by the present invention According to the simulation results of the body section model of the column structure, the shortest distance from the side wall column of the passenger car on the collision side to the living space is 55.7mm; by comparing the results, it can be clearly seen that the body section structure of the present invention can effectively reduce the size of the body side wall structure. The amount of deformation significantly improves the rollover safety performance of the bus.

Claims (3)

1. variable section punching press welding passenger vehicle gusset pillar construction, it is characterized in that: be welded by outer panel structure (6) and U-shaped inner plate structure (7) two parts, outer panel structure (6) is identical to width breast beam (3) from top longeron (2), breast beam (3) is between lower waist rail (5), and its width increases from the top down gradually; U-shaped inner plate structure (7) sectional dimension increases from top to bottom gradually along the strut length direction, the dimension width in each cross section of U-shaped inner plate structure (7) is all less than the section width of same cross-sectional position outer panel structure (6), and U-shaped inner plate structure (7) has with outer panel structure (6) junction and waits the welded lap of width regional.

2. a kind of variable section punching press welding passenger vehicle gusset pillar construction according to claim 1, it is characterized in that: described outer panel structure (6) is 50-60mm from top longeron (2) to the width breast beam (3), breast beam (3) is 80-100mm to maximum width between lower waist rail (5), and wall thickness is 3-4mm.

3. a kind of variable section punching press welding passenger vehicle gusset pillar construction according to claim 1, it is characterized in that: the high wide size in described U-shaped inner plate structure (7) cross section is than being 0.6-0.9, the smallest cross-sectional size is compared with largest cross-sectional sized, aspect ratio is 0.4-0.7, width is than being 0.4-0.7, and wall thickness is 3-4mm.

Images