CN101428649A - Automotive floor skirt beam for alternation type overlap joint soldering - Google Patents

Abstract

The invention relates to an edge beam for the floor of a vehicle adopting staggered overlap welding. The edge beam is formed by welding two sections, the two sections of edge beam mutually form X-shaped overlapping edges at the welded ended, and the two overlapping edges are welded together in a mutually staggered manner. By adopting the structural design, in the head on collision process of the vehicle, if the impact energy is strong, behind the welding spot of the overlapping edges of the edge beam, the staggered overlapping of the edge beam continues exerting the functions of transmitting and dispersing the energy, so as to improve the impact resistance and better guarantee the safety space of the passenger compartment. At the same time, through the X-shaped staggered overlapping of the edge beam, the bending rigidity and the torsional rigidity of the vehicle body can be enhanced, and the driving comfort can be ensured. The staggered overlapping structure does not need to adopt special techniques and technologies and increase the working procedure or material thickness, the shaping is simple, the structure is easy to realize, and is favorable for the assembly of the front floor and the rear floor.

Description

The automotive floor skirt beam of a kind of alternating expression overlap joint welding

Technical field

The invention belongs to the automotive body structure technology, be specifically related to the structure of floor skirt beam.

Background technology

Rapid growth along with automobile pollution, traffic accident also climbs up and up, reasonable consumption and national compulsory the customer collide under the overall situation of code enforcement, auto trade is all attached great importance to for the safety performance of collision, therefore, by optimizing the body structure design, to satisfy customer's consumption demand, and adapting to new collision rules, it is particularly important that the passive satety of raising body drawing shows.

Because in the central collision process, by front anti-collision beam with impact force longeron transmission to the left and right, wherein the left and right sides side bar on floor plays important role in energy transfer process, impact energy is dispersed to the rear portion, if side bar intensity can not guarantee, the driving engine that very easily takes place in the cabin is invaded the crew module, dangerous life safety to the occupant.At this situation, car manufactures generally adopts the floor skirt beam of profile complexity and increases reinforcement on the floor at present, or increase material material is thick or adopt more high-intensity material to reach crashproof ability and the non-deformability that improves vehicle body, so just exist some such as the forming parts difficulty, complex manufacturing, the productive costs height, the problem that the part condemnation factor is big.

Summary of the invention

In order not pass through to increase on the basis of large-scale reinforcement or material thickness, bump safety before further better improving, improve the non-deformability of vehicle body, can effectively reduce productive costs and use cost again, the present invention proposes to have adopted the alternating expression of passive security structure design to overlap the automotive floor skirt beam of welding at the vehicle body middle part.

Technical scheme of the present invention is as follows:

The automotive floor skirt beam of a kind of alternating expression overlap joint welding, described side bar is divided into two sections and is welded to form, and two sections side bars form the landing edge of X type, the interlaced weld together of two landing edges mutually at welding end.

Adopt this structure design, vehicle is in the central collision process, if impact energy is stronger, after having peeled off the landing edge solder joint of side bar, the alternating expression overlap joint of side bar continues the effect of performance transmission, energy dispersive, improves impact resistance, better guarantees crew module's survival space.

Simultaneously,, can improve the bending stiffness and the torsional stiffness of vehicle body, guarantee the traveling comfort of driving by " X type " alternating expression overlap joint of side bar.

This alternating expression bridging arrangement does not need to adopt special process technology, increase operation or material material thick, and moulding is simple, realizes easily, and helps the assembling on floor, front and back, and as the fitting process of Fig. 2, as can be seen, this structure can be controlled the precision of assembling well.

Description of drawings

The constructional drawing of the floor skirt beam of Fig. 1 alternating expression overlap joint;

Figure 1A is the A-A cutaway view of Fig. 1; Figure 1B is the B-B cutaway view of Fig. 1;

The (a) and (b) of Fig. 2, (c), (d) are the welding engagement process figure of the alternating expression overlap joint of floor skirt beam;

(e) of Fig. 3, (f), (g) be vehicle in the central collision process, the motion process figure that side bar break away to be invaded;

Wherein: a floor skirt beam left side before 1, a floor skirt beam left side, 2 back, 3 alternating expressions overlap joint zone

The specific embodiment

Referring to Fig. 1, Figure 1A and Figure 1B, with left side beam is example, the floor skirt beam of automobile is a floor skirt beam left side 1 and 2 two sections on a floor skirt beam left side, back before the branch, this alternating expression bridging arrangement is the landing edge that forms the X type at the welding end of two sections side bars mutually, the interlaced weld together of two landing edges promptly forms the overlap joint of the alternating expression shown in 3 zone among Fig. 1.

Concrete welding engagement process is with Fig. 2, the preceding floor assembly of a preceding floor skirt beam left side 1 among the design by the place is fixed on the anchor clamps, yearned for along negative Z by the back floor assembly at place together in a floor skirt beam left side 2, back, pass through (a) and (b) shown in Figure 2, (c) then successively, in the whole engagement process that (d) finishes, a preceding floor skirt beam left side 1 is similar to a guiding mechanism, the accuracy of being convenient to lay with a floor skirt beam left side, back 2.Simultaneously, owing to adopted the alternating expression structure,, will cause a floor skirt beam left side, back 2 in transferring process, to be interfered and can't reach matching requirements with a preceding floor skirt beam left side 1 if both profile errors are too big, therefore require both cooperations more accurate, controlled the quality of fit of preceding floor assembly and back floor assembly.

If it is very powerful before to bump energy, a floor skirt beam left side 1 is peeled off with the solder joint of a floor skirt beam left side, back 2 in overlap joint zone 3 and is separated before causing.Shown in (e), (f) of Fig. 3, (g), then both continue to play a role by this alternating expression structure, and impact energy is passed to body tail, better guarantee crew module's survival space.

As seen, by above-mentioned alternating expression structure design, make two side bars and the other side all have matching relationship at pros and cons, and the basic satisfied contact surface that is equal to, therefore, in the motion process of car load, guaranteed torsional stiffness balance that should the zone and stable, better met customer's driver comfort.

Claims (1)

1, the automotive floor skirt beam of a kind of alternating expression overlap joint welding, described side bar is divided into two sections and is welded to form, and it is characterized in that: two sections side bars form the landing edge of X type, the interlaced weld together of two landing edges mutually at welding end.

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