Ultrahigh-strength automobile doorsill structure manufactured based on hot air expansion tubular beam

Abstract

According to the ultrahigh-strength automobile doorsill structure manufactured based on the hot air expansion tubular beam, the tubular beam manufactured through the hot air expansion technology is adopted as an internal reinforcing tubular beam, and meanwhile the shape of the pipe section, corresponding to the positions between different chassis cross beams, in the reinforcing tubular beam is designed to be of an arch structure protruding towards the outer side of an automobile body; therefore, the structural strength of the doorsill is greatly improved under the double guarantee of the structure and material characteristics, the deformation of a vehicle body can be effectively reduced and excessive invasion to the center of a chassis can be avoided when lateral collision occurs, and the doorsill is particularly suitable for power battery safety protection of a new energy vehicle.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle body part processing and manufacturing, and particularly relates to an ultrahigh-strength automobile door sill structure based on hot gas pipe beam manufacturing. BACKGROUND

[0002] At present, with the increasing emphasis on the safety of new energy automobile batteries in the field, the door sill components manufactured by stamping and welding, roll pressing and welding and other processes have obviously failed to meet the requirements of side collision protection. Although the extruded aluminum integrated door sill structure has improved in terms of anti-collision indicators compared with traditional process products, it still has many problems such as high raw material cost, complex process operation, serious waste and noise pollution, etc., resulting in high product prices. SUMMARY

[0003] Therefore, in view of the technical problems existing in the field, the present application provides an ultrahigh-strength automobile door sill structure based on hot gas pipe beam manufacturing, which is composed of a door sill inner side plate, a reinforcing pipe beam and a door sill outer side plate.

[0004] The door sill inner side plate has a U-shaped cross section, with the groove facing the outer side of the vehicle body. The bottom surface outside is sequentially provided with mounting portions for connecting and fixing the lower A-pillar reinforcement plate, the first front seat cross beam, the second front seat cross beam and the first rear floor cross beam from front to rear. The bottom surface inside is provided with a plurality of connecting brackets for mounting the reinforcing pipe beam.

[0005] The reinforcing pipe beam is manufactured by hot gas expansion process, and is contained in the groove of the door sill inner side plate and connected and fixed with the bottom surface. The pipe segments of the reinforcing pipe beam corresponding to the lower A-pillar reinforcement plate and the first front seat cross beam, and the second front seat cross beam and the first rear floor cross beam are both in the shape of an arch protruding outwardly to the vehicle body.

[0006] The door sill outer side plate is fixedly installed on the door sill inner side plate and covers the groove thereof, and the two together form a closed pipe cavity containing the reinforcing pipe beam.

[0007] Further, the upper and lower edges of the door sill inner side plate and the door sill outer side plate are both in a flanged structure to increase the contact area and connection strength of the two.

[0008] Correspondingly, the present application also provides an automobile adopting the ultrahigh-strength automobile door sill structure based on hot gas pipe beam manufacturing.

[0009] Further, the automobile is a new energy automobile, and the power battery is arranged at the chassis position corresponding to the arched pipe segment of the reinforcing pipe beam in the door sill structure.

[0010] The super-high-strength automobile door sill structure manufactured based on the hot gas expansion pipe beam provided by the application adopts the pipe beam manufactured by the hot gas expansion process as the internal reinforcing pipe beam, and the pipe section corresponding to the different chassis cross beams in the reinforcing pipe beam is designed as an arch structure protruding to the outside of the vehicle body, so that the strength of the door sill structure is greatly improved under the double guarantee of the structure and the material characteristics, the deformation of the vehicle body can be effectively reduced and the excessive intrusion into the center of the chassis can be avoided when the lateral collision occurs, and therefore the super-high-strength automobile door sill structure is especially suitable for the safety protection of the power battery of a new energy vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 FIG. 1 is a perspective view of the super-high-strength automobile door sill structure provided by the application;

[0012] Figure 2 FIG. 2 is a perspective view of the combination of the inner side plate of the door sill and the reinforcing pipe beam;

[0013] Figure 3 FIG. 3 is a sectional view of the super-high-strength automobile door sill structure;

[0014] Figure 4 FIG. 4 is a schematic view of the combination and installation of the inner side plate of the door sill, the reinforcing pipe beam and the chassis cross beams;

[0015] Figure 5 FIG. 5 is a schematic view of the optional structure of each pipe section of the reinforcing pipe beam;

[0016] Figure 6 FIG. 6 is a schematic view of the side column collision of the super-high-strength automobile door sill structure provided by the application;

[0017] Figure 7 FIG. 7 is a force decomposition diagram of the side column collision of the super-high-strength automobile door sill structure provided by the application.

[0018] Legend of reference signs: 1, inner side plate of door sill; 2, reinforcing pipe beam; 3, outer side plate of door sill; 4, connecting bracket; 5, front seat cross beam; 6, first rear floor cross beam; 7, A-pillar lower reinforcing plate; 8, side collision column body. DETAILED DESCRIPTION

[0019] The technical solutions of the application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0020] The super-high-strength automobile door sill structure manufactured based on the hot gas expansion pipe beam provided by the application is composed of the inner side plate of the door sill 1, the reinforcing pipe beam 2 and the outer side plate of the door sill 3;

[0021] The threshold inner side plate 1 has a U-shaped section, and a groove is formed on the outer side of the threshold inner side plate 1, and a mounting portion for connecting and fixing the A-pillar lower reinforcing plate 7, the front seat first cross beam, the front seat second cross beam and the rear floor first cross beam is sequentially arranged on the outer side of the bottom surface from front to back; a plurality of connecting brackets 4 for mounting the reinforcing pipe beam 2 are arranged on the inner side of the bottom surface;

[0022] The reinforcing pipe beam 2 is manufactured by using a hot gas expansion process, and the material can be selected from BR1500HS or 2Gpa boron steel, and the pipe wall thickness can be selected in the range of 1.4-3.5mm; the reinforcing pipe beam 2 is contained in the groove of the threshold inner side plate 1 and is connected and fixed with the bottom surface; the pipe segments corresponding to the A-pillar lower reinforcing plate 7 and the front seat first cross beam and the front seat second cross beam and the rear floor first cross beam are all in the shape of an arch protruding outwardly to the vehicle body.

[0023] The threshold outer side plate 3 is fixedly mounted on the threshold inner side plate 1 and covers the groove, and the threshold outer side plate 3 and the threshold inner side plate 1 together form a closed pipe cavity containing the reinforcing pipe beam 2.

[0024] Figure 6 It is shown that the column 8 contacts the threshold region between the front seat second cross beam and the rear floor first cross beam during the side column collision test, Figure 7 It is shown that the collision force transmission form in this case, and it can be seen that the reinforcing pipe beam in the shape of an arch at this position can decompose the lateral collision force F1 into F2 and F3, and then transmit part of the force F2Y and F3Y to the other side of the vehicle body through the front seat second cross beam and the rear floor first cross beam, and under the guarantee of the super-high strength and non-deformability of the hot gas expansion pipe beam, the deformation of the vehicle body and the intrusion into the center of the chassis can be reduced as much as possible. However, the existing longitudinal straight threshold structure cannot well realize the collision force dispersion and transmission when facing such a collision, and the vehicle body will be severely collapsed in an instant, which will exert a strong longitudinal pulling force on the front and rear cross beams, and then cause serious damage to the chassis, the power system and even the vehicle cabin. More importantly, the existing extruded aluminum threshold cannot be compared with the hot gas expansion pipe beam in terms of structural strength and protection performance.

[0025] In a preferred embodiment of the present application, the threshold inner side plate 1 and the threshold outer side plate 3 can be manufactured by using aluminum alloy or stainless steel materials through hot forming stamping or high-strength sheet metal cold stamping process, and the thickness of the plate is selected to be between 1.2-1.6mm, and the upper and lower edges are all in the form of a flange structure for increasing the contact area and the connection strength.

[0026] Correspondingly, the present application also provides an automobile adopting the super-high strength automobile threshold structure based on the hot gas expansion pipe beam.

[0027] In a preferred embodiment of the present invention, the vehicle is a new energy vehicle, and its power battery is located in the chassis position corresponding to the arched section of the reinforcing beam 2 in the sill structure. Utilizing this ultra-high strength vehicle sill structure provided by the present invention, it is possible to effectively prevent vehicle body deformation from intruding into the power battery during a side collision, thus significantly improving the safety of new energy vehicles.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] It should be understood that the sequence number of each step in the embodiments of the present invention does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultra-high strength automotive door sill structure based on a hot-expanded tube beam, characterized in that: It consists of an inner sill plate, a reinforcing tube beam, and an outer sill plate. Among them, the inner side panel of the door sill has a U-shaped cross section, with its slot facing the outer side of the vehicle body. The bottom outer side is provided with mounting parts for connecting and fixing the A-pillar lower reinforcement plate, the first crossbeam of the front seat, the second crossbeam of the front seat, and the first crossbeam of the rear floor from front to back; and several connecting brackets for installing the reinforcement tube beam are provided on its bottom inner side. The reinforcing tube beam is manufactured using a hot air expansion process. It is accommodated in the slot of the inner side panel of the door sill and is connected and fixed to the bottom surface. The tube sections of the reinforcing tube beam between the A-pillar under the reinforcing plate and the first crossbeam of the front seat, and between the second crossbeam of the front seat and the first crossbeam of the rear floor, are all arched and protrude outwards from the vehicle body. The outer side panel of the sill is fixedly installed on the inner side panel of the sill and covers its groove. Together, they form a closed cavity to accommodate the reinforcing tube beam.

2. The ultra-high strength automotive door sill structure as described in claim 1, characterized in that: The upper and lower edges of both the inner and outer sill plates are flanged to increase the contact area and connection strength.

3. A car, characterized in that: The ultra-high strength automobile door sill structure based on hot gas expansion tube beam as described in claim 1 or 2 is adopted.

4. The automobile as described in claim 3, characterized in that: Specifically, it is a new energy vehicle in which the power battery is located in the chassis position corresponding to the arched pipe section of the reinforcing tube beam in the sill structure.

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