Automobile door sill structure

Abstract

The utility model provides a kind of automobile door threshold structure, strengthened pipe beam manufactured by hot gas expansion process is used to strengthen internal structure, the region corresponding between on strengthened pipe beam and different chassis cross beam is set to the arched structure pipe section that protrudes to vehicle body outside, can significantly improve the structural strength of door threshold as a whole, when lateral collision occurs, it can effectively reduce the deformation of vehicle body and avoid excessive intrusion to chassis center, improve the safety protection level of chassis components such as new energy automobile power battery.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts processing and manufacturing technology, specifically relating to an automotive door sill structure. Background Technology

[0002] Currently, as the industry continues to place greater emphasis on the safety of new energy vehicle batteries, door sill components manufactured using processes such as stamping and welding, and roll welding are clearly unable to meet the requirements for side collision protection. Although extruded aluminum unibody door sill structures have improved in terms of collision protection performance compared to traditional products, they also have many problems such as high raw material costs, complex processes, and serious waste and noise pollution, resulting in high product prices. Summary of the Invention

[0003] In view of this, and in response to the technical problems existing in this field, the present invention provides a car door sill structure, which is composed of an inner door sill plate, a reinforcing tube beam and an outer door sill plate;

[0004] 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.

[0005] The reinforcing tube beam is made of BR1500HS or 2Gpa steel and manufactured based on hot air expansion process. The wall thickness ranges from 1.4 to 3.5 mm. 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 outward from the vehicle body.

[0006] 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.

[0007] Furthermore, the upper and lower edges of both the inner and outer sill plates adopt a flanged structure to increase the contact area and connection strength between them.

[0008] Accordingly, this utility model also provides a car that adopts the above-mentioned car door sill structure.

[0009] Furthermore, 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 tube beam in the sill structure.

[0010] The automobile door sill structure provided by the present invention uses a reinforced tube beam manufactured by hot air expansion process to strengthen the internal structure. Arched structural tube segments protruding outwards from the vehicle body are set in the corresponding areas between the reinforced tube beam and different chassis crossbeams. This can significantly improve the overall structural strength of the door sill. In the event of a side collision, it can effectively reduce the deformation of the vehicle body and avoid excessive intrusion into the center of the chassis, thereby improving the safety protection level of chassis components such as the power battery of new energy vehicles. Attached Figure Description

[0011] Figure 1 A three-dimensional structural diagram of the overall car door sill structure provided by this utility model;

[0012] Figure 2 This is a three-dimensional structural diagram of the inner side panel of the threshold and the reinforcing tube beam.

[0013] Figure 3 This is a cross-sectional view of the car door sill structure;

[0014] Figure 4 This is a schematic diagram showing the combined installation of the inner side panel of the threshold, the reinforcing tube beam, and each chassis crossbeam.

[0015] Figure 5 A schematic diagram of the optional structures for each section of the tube beam;

[0016] Figure 6 A side pillar collision diagram of the automobile door sill structure provided by this utility model.

[0017] Explanation of reference numerals in the attached diagram: 1-Inner door sill plate, 2-Reinforcing tube beam, 3-Outer door sill plate, 4-Connecting bracket, 5-Front seat crossbeam, 6-First crossbeam of the rear floor, 7-Reinforcing plate under the A-pillar, 8-Side collision pillar. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] The automobile door sill structure provided by this utility model consists of an inner door sill plate 1, a reinforcing tube beam 2, and an outer door sill plate 3.

[0020] Among them, the inner side panel 1 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 reinforcing plate 7, 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 4 for installing the reinforcing tube beam 2 are provided on its bottom inner side.

[0021] The reinforcing tube beam 2 is made of BR1500HS or 2Gpa steel and manufactured based on hot air expansion process, with a thickness selectable in the range of 1.4-3.5mm; it is accommodated in the slot of the inner side panel 1 of the door sill and is connected and fixed to the bottom surface; the tube sections of the reinforcing tube beam 2 between the A-pillar under the reinforcing plate 7 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.

[0022] The outer sill plate 3 is fixedly installed on the inner sill plate 1 and covers its slot, together forming a closed cavity to accommodate the reinforcing tube beam 2. The outer sill plate and the inner sill plate can be made of materials such as steel and aluminum.

[0023] Figure 6 The diagram illustrates that during a side impact test, the pillar 8 made contact with the sill area between the second crossbeam of the front seat and the first crossbeam of the rear floor. At this location, the arch-shaped reinforced tubular beam decomposes the lateral impact force, transferring a portion of the force to the other side of the vehicle body via the second crossbeam of the front seat and the first crossbeam of the rear floor. Thanks to the ultra-high strength and non-deformable performance of the thermally expanded tubular beam, vehicle body deformation and intrusion into the center of the chassis are minimized. In contrast, existing longitudinally straight sill structures cannot effectively disperse and transfer impact forces in such a collision. The moment the vehicle body undergoes severe lateral crumpling, it exerts strong longitudinal tension on the front and rear crossbeams, leading to serious damage to the chassis, powertrain, and even the passenger compartment. More importantly, the structural strength and protective performance of existing extruded aluminum sills are incomparable to the thermally expanded tubular beam used in this invention.

[0024] In a preferred embodiment of this utility model, the inner sill plate 1 and the outer sill plate 3 can be made of aluminum alloy or stainless steel by hot forming stamping or high-strength sheet metal cold stamping process. The thickness of the plate is selected to be between 1.2-1.6mm, and the upper and lower edges are both made of flanged structure to increase the contact area and connection strength.

[0025] Accordingly, this utility model also provides a car that adopts the above-mentioned car door sill structure.

[0026] In a preferred embodiment of this 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 vehicle sill structure provided by this 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.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0029] It should be understood that the sequence number of each step in the embodiments of this utility model 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 this utility model.

[0030] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A car door sill structure, 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 made of BR1500HS or 2Gpa steel and manufactured based on hot air expansion process. The wall thickness ranges from 1.4 to 3.5 mm. 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 outward 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 car 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 vehicle door sill structure 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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