CN202029913U

CN202029913U - Lap-jointing reinforcement structure for front and back floors of automobile

Info

Publication number: CN202029913U
Application number: CN2011201118233U
Authority: CN
Inventors: 梁昌明; 张成勇; 林强
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2011-04-15
Filing date: 2011-04-15
Publication date: 2011-11-09
Anticipated expiration: 2021-04-15

Abstract

The utility model provides a lap-jointing reinforcement structure for a front floor and a back floor of an automobile, comprising the front floor, a connecting piece for the front floor and the back floor, the back floor and a seat installation beam. The connecting piece for the front floor and the back floor is a strip part with the cross section in a bilayer-stair shape, the bottom plane of the stair at the lower layer is welded with a lap-jointing edge of the front floor through two layers of solder together, and the top plane of the stair at the upper layer is welded with the lap-jointing edge of the back floor and the seat installation beam through three layers of solder together. The improved structure can improve the connection strength of the front floor and the back floor, and the properties such as bending rigidity and torsion rigidity of an automobile body to meet the requirement on side collision; and the structure can also provide higher installation point strength.

Description

The overlap joint additional strengthening on floor before and after a kind of automobile

Technical field

The utility model relates to a kind of body structure, is specifically related to the bridging arrangement on floor, a kind of automobile front and back.

Background technology

Now, people are more and more higher to the security requirement of vehicle, and relevant mechanism of department also estimates the active and the passive security performance of automobile in the more rational judgment criteria of formulation.Relate to body structure, just require the intensity of vehicle body to want enough good, the huge bump when resisting auto against.

The forward and backward floor welding of automobile assembly is two big component parts of general self-supporting body lower body.Overlap joint between these two big assemblies is extremely important, because the general design in the position, space of lap-joint has the attachment point of back seat and the attachment point of fuel tank to also have some other attachment point, therefore good bridging arrangement mounting structure that not only can provide and higher attachment point intensity for the installation of other parts, the use that reduces reinforcement and support just reduces cost, and forward and backward floor is solidified into an integral body with taking over from the past and setting a new course for the future.No matter need cross-car to transmit the power this respect during still from collision from the performance (torsional stiffness, bending stiffness etc.) of body in white.A good forward and backward floor bridging arrangement all has bigger help to whole body in white.

The lap-joint on the present forward and backward floor of automobile is welded direct to forward and backward floor together, becomes cavity body structure with a big reinforcement and floor, back weld together again.This reinforcement can provide some attachment points.Cavity body structure is also helpful to the mode of improving herein.The shortcoming of this structure is that forward and backward floor weld is not owing to there is reinforcement structure on the one hand, and solder joint ftractures easily, and the fact also proves so; Be that the weak back floor of relative thin can not provide higher installation strength for attachment point on the other hand, even reinforcement is arranged below the attachment point, regard an integral body as and analyze if attachment point and reinforcement zone isolated to come, the power that this integral body is subjected to can only lean on weak floor to bear and transmit, and effect is little.Have only the power that attachment point is subjected to be delivered to whole vehicle body and be only reasonable structure by supplementary structure.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of new forward and backward floor overlap joint additional strengthening, this structure can provide higher attachment point intensity, can satisfy the requirement of side impact and to the vehicle body various aspects of performance, as bending stiffness, torsional stiffness etc. have the raising effect.

For solving the problems of the technologies described above, the utility model is taked following technical scheme:

The bridging arrangement on floor before and after a kind of automobile, it comprises preceding floor, floor, front and back attaching parts, floor, back and chair mounted crossbeam.Floor, described front and back attaching parts is the elongate member that cross-sectional plane is the double layers table scalariform, the landing edge on lower floor step baseplane and preceding floor is welded together by two-layer weldering, and plane, upper strata step top is welded together by three layers of weldering with the landing edge and the chair mounted crossbeam on floor, back.

Further, the elongate member that the cross-sectional plane of described chair mounted crossbeam is L-shaped, limit and floor, the front and back attaching parts of its L are welded together by two-layer weldering, another limit is welded together by three layers of weldering with floor, back and floor, front and back attaching parts, becomes a cavity body structure with floor, front and back attaching parts.

Floor bonded assembly intensity before and after said structure after the improvement can improve has the raising effect to performances such as the bending stiffness of vehicle body, torsional stiffnesies, satisfies the requirement of side impact; And this structure can also provide higher attachment point intensity.

Description of drawings

Fig. 1 is the lateral plan of floor, front and back bridging arrangement;

Fig. 2 is the cutaway view of floor, front and back bridging arrangement.

The specific embodiment

Describe this structure in detail below in conjunction with accompanying drawing:

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this structure comprises four big parts, is respectively preceding floor 1, floor, front and back attaching parts 2, floor 3, back and chair mounted crossbeam 4.Automobile itself is not a stress members with preceding floor 1 and floor 3, back, generally all is the sheet steels that adopt thickness 0.7mm or 0.8mm.Before and after floor attaching parts 2 be the elongate member of double layers table scalariform for cross-sectional plane, the landing edge on lower floor step baseplane and preceding floor 1 is welded together by two-layer weldering, the landing edge on plane, upper strata step top and floor 3, back passes through to weld welded together.Thickness 1.0mm and the reasonable DC03 steel plate of use punching press shape are at least adopted in the effect on floor before and after floor, front and back attaching parts 2 plays and connects.Chair mounted crossbeam 4 is owing to will provide the chair mounted point, and in order to satisfy attachment point intensity, its material will use the HC280/590DP of superhigh intensity, expects thick 1.6mm.If use general material, even there is reinforcement at the attachment point place, if there is not good supplementary structure that the power that is subjected to is passed herein, the phenomenon that just may occur ftractureing around the attachment point, and these supplementary structures all can increase the weight of car body, increase to use the car cost.Chair mounted crossbeam 4 is the L-shaped elongate member of cross-sectional plane, limit and floor, the front and back attaching parts 2 of its L are welded together by two-layer weldering, another limit is welded together by three layers of weldering with floor 3, back and floor, front and back attaching parts 2, become a cavity body structure with floor, front and back attaching parts, because the use of ultrastrength material, this structure can become the good stressed transmission channels in a place when side impact.

From the material that uses and expect thick on, what floor, front and back and attaching parts all used is to be no more than the thick steel plate of 1.0mm material, also need other auxiliary strength beam structure (preceding floor reinforcement beams below the whole bridging arrangement, floor, front and back attaching parts reinforcement, the skeleton longeron) guarantees the various aspects of performance (bending stiffness, torsional stiffness) of vehicle body and the needs that transmit power when satisfying side impact.And these strength beam structures also must snap into together mutually.

Claims

1. the bridging arrangement on floor before and after the automobile, it comprises preceding floor (1), floor, front and back attaching parts (2), floor (3), back and chair mounted crossbeam (4); It is characterized in that: floor, described front and back attaching parts (2) is the elongate member of double layers table scalariform for cross-sectional plane, the landing edge of its lower floor step baseplane and preceding floor (1) is welded together by two-layer weldering, and plane, upper strata step top is welded together by three layers of weldering with the landing edge and the chair mounted crossbeam (4) on floor, back (3).

2. the bridging arrangement on floor before and after the automobile according to claim 1, it is characterized in that: the L-shaped elongate member of cross-sectional plane of described chair mounted crossbeam (4), limit and floor, the front and back attaching parts (2) of its L are welded together by two-layer weldering, another limit is welded together by three layers of weldering with floor (3), back and floor, front and back attaching parts (2), becomes a cavity body structure with floor, front and back attaching parts.