Split type aluminum alloy doorsill beam assembly structure

Abstract

The invention belongs to the technical field of automobiles, and discloses a split type aluminum alloy doorsill beam assembly structure which comprises an inner doorsill beam and an outer doorsill beam, the inner doorsill beam comprises a first vertical part and a first horizontal part, the lower end of the first vertical part is connected with a battery tray edge beam, and the first vertical part is connected with a lower automobile body floor and a lower automobile body floor cross beam; the upper end of the first horizontal part is an inclined surface; the outer doorsill beam comprises a second vertical part and a second horizontal part, one side of the second vertical part is adjacent to the side face of the first horizontal part, a gap exists between the second vertical part and the side face of the first horizontal part, the second vertical part is connected with the side wall of the first horizontal part through a second connecting device, the other side of the second vertical part is connected with the side wall B column, and the lower end of the second horizontal part is an inclined face. The lower end of the second horizontal part is adjacent to the upper end of the first horizontal part, the side wall of the second horizontal part is adjacent to the side wall of the first vertical part, and the first horizontal part is connected with the side wall B column. The invention has the advantages of simple assembly, high precision and high connection strength.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobiles, and specifically discloses a split aluminum alloy sill beam assembly structure. Background Art

[0002] As an important part of the automobile body structure, the automobile sill beam is located at the bottom of the automobile body and is connected to parts such as the automobile sill and the side wall. Its main functions are to strengthen the body structure, improve the body rigidity and torsional resistance performance, and at the same time bear and disperse the impact force during a collision. However, due to its relatively large self-weight, the traditional steel sill beam is difficult to meet the dual requirements of new energy vehicles for lightweight and improved side pole impact safety performance. To solve this problem, in the prior art, a method of adding an aluminum alloy profile as a strengthening support member into the traditional steel sill beam weldment is adopted to reduce the weight and improve the performance. With the development of new energy vehicle body technology, the application of aluminum alloy extruded sill beams in the fields of all-aluminum bodies and steel-aluminum hybrid bodies is becoming increasingly widespread.

[0003] In the skateboard chassis technical solution, there has always been a controversy about the ownership of the sill beam. In the traditional automobile manufacturing process, the sill beam is a weldment composed of the lower body floor side beam and the upper body side wall lower side beam, with a sheet metal reinforcement member built in the middle. On the white body general assembly welding production line, the side wall and the lower body are clamped by a fixture to form a cavity-structured sill beam assembly. However, in the skateboard chassis technical solution, due to the decoupled development of the upper and lower bodies, all suspension systems and power systems can be pre-integrated on the chassis, and then different intelligent cockpits can be loaded according to the vehicle use. This process route requires a separate sill beam structure to replace the cavity structure formed after the welding of the original upper and lower bodies. The sill beam structure is an important structure for connecting the front and rear compartments of the lower body and constructing the occupant compartment floor, which is related to the development performance of the lower body in terms of strength, stiffness, mode, and collision safety. Therefore, the sill beam should belong to the lower body. However, decoupled development means that the A, B, and C pillars of the upper body must be completely owned by the upper body. Without the sill beam, the A, B, and C pillars of the upper body will lose the connection of the lower cross beam, forming a forked state with poor stiffness, which is not conducive to the assembly and connection between the upper body and the lower body. If the sill beam belongs to the upper body, the A, B, and C pillars of the upper body are connected to the sill beam, and the upper body assembly forms a cage structure, thus ensuring the stability of the upper body structure. However, without the sill beam, the lower body loses the longitudinal beam connecting the front and rear compartments, resulting in an incomplete lower body structure.

[0004] In the skateboard chassis technical solution, the chassis and the intelligent cockpit are assembled vertically. Neither the traditional steel welded sill beam nor the integrally formed aluminum alloy extruded sill beam can achieve vertical assembly. Existing patents, such as CN115352531A, describe a split sill beam structure, but its two-part sill beam structure is connected by a connecting frame. The connecting frame is L-shaped, and the two straight sides are respectively connected to the two-part sill beam structure by bolts. The sill beam is made by an extrusion process, with deviations in straightness, angle, camber, and twist. Within the length range of about 2m of the sill beam, this connection method has no single-piece manufacturing deviation absorption function, resulting in poor assembly accuracy and even inability to assemble; the cross-sectional size of the connecting frame profile is small, the structural wall thickness is small, and the connection strength is poor.

[0005] In view of the above problems, it is very necessary to research and design a new type of split aluminum alloy sill beam assembly structure to overcome the problems existing in the production of existing automotive sill beams. This new structure should be able to meet the requirements of the skateboard chassis technical solution, while improving assembly accuracy and connection strength, and ensuring the stability and safety of the upper body and the lower body. Summary of the Invention

[0006] The present invention proposes a split aluminum alloy sill beam assembly structure to solve the problems of difficult assembly, poor accuracy, unstable structure, and insufficient connection strength of existing sill beams.

[0007] The present invention provides a split aluminum alloy sill beam assembly structure, including

[0008] An inner sill beam, the inner sill beam is a hollow profile, the cross-section of the inner sill beam is L-shaped, including a first vertical part and a first horizontal part. The lower end of the first vertical part is connected to the battery tray side beam through a first connecting device. The first vertical part is connected to the lower body floor and the lower body floor cross beam. The upper end of the first horizontal part is an inclined surface;

[0009] An outer sill beam, the outer sill beam is a hollow profile, the cross-section of the outer sill beam is L-shaped, including a second vertical part and a second horizontal part. One side of the second vertical part is adjacent to the side surface of the first horizontal part with a gap, and the second vertical part is connected to the side wall of the first horizontal part through a second connecting device. The other side of the second vertical part is connected to the sidewall B pillar. The lower end of the second horizontal part is an inclined surface. The lower end of the second horizontal part is adjacent to the upper end of the first horizontal part with a gap. The side wall of the second horizontal part is adjacent to the side wall of the first vertical part with a gap. The first horizontal part is connected to the sidewall B pillar.

[0010] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, an extruded first insertion slot is provided on the inner side of the bottom wall of the first vertical part.

[0011] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, the first connecting device includes a battery tray side beam mounting nut plate, a battery tray side beam mounting nut, a battery tray side beam mounting sleeve, and a battery tray side beam mounting bolt. The battery tray side beam mounting nut is welded to the battery tray side beam mounting nut plate, and the battery tray side beam mounting nut plate is provided with a through hole corresponding to the battery tray side beam mounting nut. The battery tray side beam mounting nut plate is inserted into the first insertion slot. A through hole is provided at the bottom wall of the first vertical portion corresponding to the battery tray side beam mounting nut. The battery tray side beam mounting sleeve is disposed on the battery tray side beam. After the battery tray side beam mounting bolt passes through the through holes of the battery tray side beam mounting sleeve, the bottom wall of the first vertical portion, and the battery tray side beam mounting nut plate, it is screwed with the battery tray side beam mounting nut.

[0012] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, the battery tray side beam mounting nut plate is connected to the bottom wall of the first vertical portion by a battery tray side beam mounting rivet. A plurality of the battery tray side beam mounting nuts are welded to the battery tray side beam mounting nut plate, and the plurality of battery tray side beam mounting nuts are uniformly arranged radially along the battery tray side beam mounting nut plate.

[0013] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, a second insertion slot formed by extrusion is provided on the inner side of the side wall of the first horizontal portion close to the second vertical portion.

[0014] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, the second connecting device includes an outer sill beam mounting nut plate, an outer sill beam mounting nut, and an outer sill beam mounting bolt. The outer sill beam mounting nut is welded to the outer sill beam mounting nut plate, and the outer sill beam mounting nut plate is provided with a through hole corresponding to the outer sill beam mounting nut. The outer sill beam mounting nut plate is inserted into the second insertion slot. Through holes are provided at the side wall of the first horizontal portion corresponding to the outer sill beam mounting nut, and through holes are provided at the left and right side walls of the second vertical portion corresponding to the outer sill beam mounting nut. After the outer sill beam mounting bolt passes through the through holes of the left and right side walls of the second vertical portion and the through hole of the side wall of the first horizontal portion, it is screwed with the outer sill beam mounting nut.

[0015] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, the outer sill beam mounting nut plate is connected to the side wall of the first horizontal portion by an outer sill beam mounting nut plate rivet. A plurality of the outer sill beam mounting nuts are welded to the outer sill beam mounting nut plate, and the plurality of outer sill beam mounting nuts are uniformly arranged radially along the outer sill beam mounting nut plate.

[0016] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, a first reinforcing rib is provided at the connection between the first vertical portion and the first horizontal portion, a second reinforcing rib arranged in parallel is provided inside the first horizontal portion, the first vertical portion and the second vertical portion are connected by two second connecting devices, the two second connecting devices are respectively arranged on the upper and lower sides of the second reinforcing rib, a third reinforcing rib arranged vertically and two fourth reinforcing ribs arranged horizontally are provided inside the first vertical portion, and the first connecting device is connected and arranged between the first reinforcing rib and the third reinforcing rib;

[0017] A fifth reinforcing rib is provided at the connection between the second vertical portion and the second horizontal portion, and two sixth reinforcing ribs arranged in parallel are provided inside the second vertical portion.

[0018] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, an inner sill beam flange is provided on the upper outer side of the side wall of the first vertical portion, and both the lower vehicle body floor and the lower vehicle body floor cross beam are connected to the inner sill beam flange by welding.

[0019] According to a split aluminum alloy sill beam assembly structure of some embodiments of the present application, an outer sill beam flange is provided on the outer side of the upper wall of the second horizontal portion, the outer sill beam flange is arranged on the extension line of the side wall of the second horizontal portion, the sidewall B-pillar includes an outer sidewall B-pillar panel and an inner sidewall B-pillar panel, the outer sidewall B-pillar panel and the inner sidewall B-pillar panel are welded together to form the sidewall B-pillar with a cavity, the outer sidewall B-pillar panel is connected to the side wall of the second vertical portion by FDS rivets of the outer sidewall B-pillar panel, a projection welded square nut of the inner sidewall B-pillar panel is welded to the lower side of the inner sidewall B-pillar panel, through holes are provided at the positions corresponding to the projection welded square nut of the inner sidewall B-pillar panel on the inner sidewall B-pillar panel, through holes are provided at the positions corresponding to the projection welded square nut of the inner sidewall B-pillar panel on the outer sill beam flange, and after the mounting bolts of the inner sidewall B-pillar pass through the through holes of the outer sill beam flange and the through holes of the inner sidewall B-pillar panel, they are screwed to the projection welded square nut of the inner sidewall B-pillar panel.

[0020] A split aluminum alloy sill beam assembly structure proposed by the present invention divides the integrally aluminum alloy extruded sill beam into upper and lower vehicle body parts. Through special structural design, it not only meets the requirements of the upper and lower assembly of the skateboard chassis but also is compatible with the traditional side panel lateral installation method, with a wide range of applications. Although there are deviations such as straightness in the extrusion forming process of the sill beam, the present invention uses the cooperation of the outer sill beam and the inner sill beam, leaving a 2-mm gap after assembly. The bevel design effectively absorbs the single-piece manufacturing deviation, improves the assembly accuracy, and has high connection strength and good overall rigidity, solving the problems such as the inability to absorb the single-piece manufacturing deviation within a range of about 2 meters and poor assembly accuracy. In addition, the present invention adopts a large-section profile direct connection structure, avoiding the defect of poor connection strength of the connecting parts. Moreover, both the outer sill beam and the inner sill beam are extruded with flanges for connecting the lower vehicle body structure and the side panel structure respectively. This structure breaks away from the traditional side panel installation method and forms a connection method that takes into account both lateral and vertical connections, meeting the requirements of decoupled development of the wire-controlled chassis and the intelligent cockpit and the upper and lower assembly of the side panel and the lower vehicle body in the skateboard chassis technical solution. The split aluminum alloy sill beam assembly structure has the advantages of light weight, corrosion resistance, easy processing, and low die cost. Its collision energy absorption characteristics are superior to those of the steel welded sill beam, improving the body rigidity and torsional resistance, and being able to better withstand and disperse the collision impact force, taking into account the traditional automobile manufacturing process and the side panel and lower vehicle body assembly requirements in the skateboard chassis technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a front view structural schematic diagram of a split aluminum alloy sill beam assembly structure according to an embodiment of the present invention;

[0022] Figure 2 FIG. is a rear view partial structural schematic diagram of a split aluminum alloy sill beam assembly structure according to an embodiment of the present invention;

[0023] Figure 3 For the present invention Figure 1 FIG. is a sectional view taken along line A-A in ;

[0024] Figure 4 For the present invention Figure 1 FIG. is a sectional view taken along line B-B in ;

[0025] Figure 5 For the present invention Figure 1 FIG. is a sectional view taken along line C-C in ;

[0026] Figure 6 For the present invention Figure 1 FIG. is a sectional view taken along line D-D in ;

[0027] Figure 7 For the present invention Figure 1 FIG. is a sectional view taken along line E-E in.

[0028] In the figure, 1 is the inner sill beam, 1-1 is the first vertical part, 1-2 is the first horizontal part, 1-3 is the first insertion card slot, 1-4 is the second insertion card slot, 2 is the outer sill beam, 2-1 is the second vertical part, 2-2 is the second horizontal part, 3 is the outer sill beam installation nut plate rivet, 4 is the outer sill beam installation nut plate, 5 is the outer sill beam installation nut, 6 is the outer sill beam installation bolt, 7 is the battery tray side beam installation rivet, 8 is the battery tray side beam installation nut plate, 9 is the battery tray side beam installation nut, 10 is the battery tray side beam installation sleeve, 11 is the battery tray side beam installation bolt, 12 is the battery tray side beam, 13 is the battery tray bottom plate, 14 is the lower body floor, 15 is the lower body floor cross beam, 16 is the outer panel of side B pillar, 17 is the inner panel of side B pillar, 18 is the FDS rivet of the outer panel of side B pillar, 19 is the projection welded square nut of the inner panel of side B pillar, 20 is the installation bolt of the inner panel of side B pillar. Detailed implementation mode

[0029] The following further describes in detail the implementation mode of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, in the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0031] This embodiment provides a split aluminum alloy sill beam assembly structure, as Figure 1-3As shown, it includes an inner sill beam 1 and an outer sill beam 2. The inner sill beam 1 is a hollow profile. As a preference of this embodiment, the inner sill beam 1 is an aluminum alloy profile made by an extrusion molding process, having a specific length and a cavity structure extending along the length direction. The cross-section of the inner sill beam 1 is L-shaped, including a first vertical portion 1-1 and a first horizontal portion 1-2. The lower end of the first vertical portion 1-1 is connected to the battery tray side beam 12 through a first connecting device. The first vertical portion 1-1 is connected to the lower vehicle body floor 14 and the lower vehicle body floor cross beam 15. The upper end of the first horizontal portion 1-2 is an inclined surface. The outer sill beam 2 is a hollow profile. As a preference of this embodiment, the outer sill beam 2 is an aluminum alloy profile made by an extrusion molding process, having a specific length and a cavity structure extending along the length direction. The cross-section of the outer sill beam 2 is L-shaped, including a second vertical portion 2-1 and a second horizontal portion 2-2. One side of the second vertical portion 2-1 is adjacent to the side surface of the first horizontal portion 1-2 with a gap of 1-3 mm. More preferably, it can be 2 mm. And the second vertical portion 2-1 is connected to the side wall of the first horizontal portion 1-2 through a second connecting device. The other side of the second vertical portion 2-1 is connected to the side wall B column. The lower end of the second horizontal portion 2-2 is an inclined surface. The lower end of the second horizontal portion 2-2 is adjacent to the upper end of the first horizontal portion 1-2 with a gap. The side wall of the second horizontal portion 2-2 is adjacent to the side wall of the first vertical portion 1-1 with a gap of 1-3 mm. More preferably, it can be 2 mm. The first horizontal portion 1-2 is connected to the side wall B column. As a preference of this embodiment, the outer contour of the sill beam assembly is rounded.

[0032] As a preference of this embodiment, specifically, as Figure 3 , Figure 6 and Figure 7 shown, an extrusion-formed first insertion slot 1-3 is provided on the inner side of the bottom wall of the first vertical portion 1-1. The first insertion slot 1-3 is integrally formed with the inner sill beam 1, which can make the overall strength higher and does not require other installation processes, making the overall assembly simpler, reducing the assembly time. The first connecting device includes a battery tray side beam mounting nut plate 8, a battery tray side beam mounting nut 9, a battery tray side beam mounting sleeve 10, and a battery tray side beam mounting bolt 11. The battery tray side beam mounting nut 9 is welded to the battery tray side beam mounting nut plate 8. More preferably, the battery tray side beam mounting nut plate 8 is a long strip plate, and a plurality of battery tray side beam mounting nuts 9 are welded on the battery tray side beam mounting nut plate 8. The plurality of battery tray side beam mounting nuts 9 are radially and evenly arranged along the battery tray side beam mounting nut plate 8 according to the size requirements. The welding connection method makes the connection between the battery tray side beam mounting nut 9 and the battery tray side beam mounting nut plate 8 tighter. And the battery tray side beam mounting nut plate 8 is provided with through holes corresponding to the battery tray side beam mounting nuts 9. The battery tray side beam mounting nut plate 8 is inserted into the first insertion slot 1-3. AsFigure 6 As shown, the battery tray side beam mounting nut plate 8 is connected to the bottom wall of the first vertical portion 1-1 by the battery tray side beam mounting rivets 7. There are multiple battery tray side beam mounting rivets 7, and the multiple battery tray side beam mounting rivets 7 are evenly arranged radially along the battery tray side beam mounting nut plate 8. A through hole is provided at the position corresponding to the battery tray side beam mounting nut 9 on the bottom wall of the first vertical portion 1-1. The battery tray side beam mounting sleeve 10 is arranged on the battery tray side beam 12. After the battery tray side beam mounting bolt 11 passes through the through hole of the battery tray side beam mounting sleeve 10, the through hole of the bottom wall of the first vertical portion 1-1, and the through hole of the battery tray side beam mounting nut plate 8, it is screwed to the battery tray side beam mounting nut 9, thereby connecting the battery tray side beam 12 to the inner sill beam 1. The outer contour of the battery tray side beam 12 is approximately L-shaped, made of aluminum alloy material, and is formed by an extrusion process, having a specific length and a cavity structure extending along the length direction, and internally provided with criss-cross reinforcing ribs. The battery tray side beam 12 is connected to the battery tray bottom plate 13. The battery tray bottom plate 13 is a flat plate structure, made of aluminum alloy material, and is formed by an extrusion process, and has a long strip-shaped cavity structure inside.

[0033] As a preference of this embodiment, specifically, as Figure 3 、 Figure 4 and Figure 5 shown, an extruded second insertion slot 1-4 is provided on the inner side of the side wall of the first horizontal portion 1-2 close to the second vertical portion 2-1. The second insertion slot 1-4 is integrally formed with the inner sill beam 1, which can make the overall strength higher and does not require other installation processes, making the overall assembly simpler, reducing the assembly time. The second connecting device includes an outer sill beam mounting nut plate 4, an outer sill beam mounting nut 5, and an outer sill beam mounting bolt 6. The outer sill beam mounting nut 5 is welded to the outer sill beam mounting nut plate 4. More preferably, the outer sill beam mounting nut plate 4 is a long strip-shaped plate, and multiple outer sill beam mounting nuts 5 are welded on the outer sill beam mounting nut plate 4. The multiple outer sill beam mounting nuts 5 are evenly arranged radially along the outer sill beam mounting nut plate 4. The welding connection method makes the connection between the outer sill beam mounting nut 5 and the outer sill beam mounting nut plate 4 more firm, and the outer sill beam mounting nut plate 4 is provided with a through hole at the position corresponding to the outer sill beam mounting nut 5. The outer sill beam mounting nut plate 4 is inserted into the second insertion slot 1-4, as Figure 4 ​As shown in the figure, the outer sill beam mounting nut plate 5 is connected to the side wall of the first horizontal part 1-2 by the outer sill beam mounting nut plate rivets 3. There are multiple outer sill beam mounting nut plate rivets 3, and the multiple outer sill beam mounting nut plate rivets 3 are evenly arranged along the radial direction of the outer sill beam mounting nut plate 5. Through holes are provided at the positions corresponding to the outer sill beam mounting nut 5 on the side wall of the first horizontal part 1-2, and through holes are provided at the positions corresponding to the outer sill beam mounting nut 5 on the left and right side walls of the second vertical part 2-1. After the outer sill beam mounting bolts 6 pass through the through holes on the left and right side walls of the second vertical part 2-1 and the through holes on the side wall of the first horizontal part 1-2, they are screwed to the outer sill beam mounting nut 5, thereby connecting the inner sill beam 1 and the outer sill beam 2. The outer sill beam 2 and the inner sill beam 1 are in a mating relationship, and a 2-mm gap is left after assembly. The outer sill beam 2 and the inner sill beam 1 are made by an extrusion molding process, and there are deviations in straightness, angle, curvature, and twist. Within the total length range of the sill beam of about 2 m, the bevel design of the outer sill beam 2 and the inner sill beam 1 can effectively absorb the manufacturing deviations of the single-piece outer sill beam 2 and the inner sill beam 1, improve the assembly accuracy, increase the connection strength, and improve the overall rigidity of the sill beam assembly.

[0034] Preferably, in this embodiment, specifically, a first reinforcing rib is provided at the connection between the first vertical part 1-1 and the first horizontal part 1-2. A second reinforcing rib is provided inside the first horizontal part 1-2 and is arranged in parallel. The first vertical part 1-1 and the second vertical part 2-1 are connected by two second connecting devices, and the two second connecting devices are respectively arranged on the upper and lower sides of the second reinforcing rib. A third reinforcing rib is provided vertically inside the first vertical part 1-1 and two fourth reinforcing ribs are provided horizontally. The first connecting device is arranged between the first reinforcing rib and the third reinforcing rib. The first reinforcing rib, the second reinforcing rib, the third reinforcing rib, and the fourth reinforcing rib divide the interior of the inner sill beam 1 into eight parts. Among them, the cross-section of the part above the first horizontal part 1-2 is similar to a trapezoid, and the cross-sections of the other parts are similar to squares; a fifth reinforcing rib is provided at the connection between the second vertical part 2-1 and the second horizontal part 2-2. Two sixth reinforcing ribs are provided inside the second vertical part 2-1 and are arranged in parallel. The fifth reinforcing rib and the sixth reinforcing rib divide the interior of the outer sill beam 2 into four parts. Among them, the cross-sections of the part above the second vertical part 2-1 and the second horizontal part 2-2 are similar to trapezoids, and the cross-sections of the other parts are similar to squares.

[0035] As a preferred embodiment of the present invention, specifically, an inner sill beam wing edge is provided at the outer upper portion of the side wall of the first vertical portion 1-1, and the lower body floor 14 and the lower body floor cross beam 15 are both connected to the inner sill beam wing edge by welding, and together form a lower body structure. More preferably, the lower body floor 14 is a flat plate structure, and a plurality of reinforcing ribs are evenly distributed on its surface along a specific direction, and the material is aluminum alloy, and is made by a stamping process, and the lower body floor cross beam 15 is a cross beam structure, and the material is aluminum alloy, and is made by an extrusion process, and has three cavities inside. An outer sill beam wing edge is provided on the outer side of the upper wall of the second horizontal portion 2-2, and the outer sill beam wing edge is arranged on the extension line of the side wall of the second horizontal portion 2-2. The side B-pillar includes a side B-pillar outer panel 16 and a side B-pillar inner panel 17. More preferably, the side B-pillar outer panel 16 is a sheet metal structure, the material is a steel plate, and is made by a stamping process. The side B-pillar inner panel 17 is a sheet metal structure, the material is a steel plate, and is made by a stamping process. The side B-pillar outer panel 16 and the side B-pillar inner panel 17 are welded to form a side B-pillar with a cavity. The side B-pillar outer panel 16 is welded to the side B-pillar inner panel 17. The FDS rivet 18 of the side B-pillar outer panel is connected to the side wall of the second vertical portion 2-1, and a side B-pillar inner panel convex welding square nut 19 is welded to the lower side of the side B-pillar inner panel 17. The side B-pillar inner panel 17 is provided with a through hole at a position corresponding to the side B-pillar inner panel convex welding square nut 19, and a through hole is provided at a position corresponding to the side B-pillar inner panel convex welding square nut 19 of the side door sill beam wing edge. After the side B-pillar inner panel mounting bolt 20 passes through the through hole of the outer door sill beam wing edge and the through hole of the side B-pillar inner panel 17, it is screwed with the side B-pillar inner panel convex welding square nut 19 to together constitute the upper body structure.

[0036] The present invention divides the original one-piece aluminum alloy extruded sill beam into two parts, one half is used for the development of the lower body, and the other half is used for the development of the upper body, and the upper and lower bodies are connected by the sill beam. The inner sill beam 1 of the lower body part connects the front and rear compartments and constructs the passenger compartment floor, ensuring the integrity of the lower body structure; the outer sill beam 2 of the upper body part is connected to the A, B, and C pillars, ensuring the stability of the upper body structure, and the connection method of the A, C pillars and the outer sill beam 2 is similar to the connection method of the B pillar. At the same time, the two parts of the sill beam can be used as the connection between the upper and lower bodies. The inner sill beam 1 and the outer sill beam 2 can both be made of aluminum alloy with a grade of 6082-T6 through an extrusion process. The inner sill beam 1 is extruded with a winged edge for connecting the lower body structure, and the outer sill beam 2 is also extruded with a winged edge for connecting the side wall structure. The trapezoidal grid of the outer sill beam 2 and the beveled edge design of the trapezoidal grid of the inner sill beam 1 effectively get rid of the traditional automobile manufacturing process in which the side wall must be installed laterally along the width of the vehicle, and instead form a method that takes into account both lateral and vertical connections. The vertical connection meets the requirements of decoupling the development of the wire-controlled chassis and the intelligent cockpit, as well as the upper and lower assembly of the side panel and the lower body in the skateboard chassis technical solution.

[0037] The embodiments of the present invention are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A split aluminum alloy threshold beam assembly structure, characterized in that: include An inner sill beam (1), the inner sill beam (1) being a hollow profile, the inner sill beam (1) having an L-shaped cross section, comprising a first vertical portion (1-1) and a first horizontal portion (1-2), the lower end of the first vertical portion (1-1) being connected to a battery tray side beam (12) via a first connecting device, the first vertical portion (1-1) being connected to a lower vehicle body floor (14) and a lower vehicle body floor cross beam (15), and the upper end of the first horizontal portion (1-2) being an inclined surface; An outer sill beam (2), the outer sill beam (2) is a hollow profile, the cross section of the outer sill beam (2) is L-shaped, comprising a second vertical portion (2-1) and a second horizontal portion (2-2), one side of the second vertical portion (2-1) is arranged adjacent to the side of the first horizontal portion (1-2) with a gap, and the second vertical portion (2-1) is connected to the side wall of the first horizontal portion (1-2) through a second connecting device, the other side of the second vertical portion (2-1) is connected to the side B-pillar, the lower end of the second horizontal portion (2-2) is an inclined surface, the lower end of the second horizontal portion (2-2) is arranged adjacent to the upper end of the first horizontal portion (1-2) with a gap, the side wall of the second horizontal portion (2-2) is arranged adjacent to the side wall of the first vertical portion (1-1) with a gap, and the first horizontal portion (1-2) is connected to the side B-pillar.

2. The split aluminum alloy door sill beam assembly structure according to claim 1, characterized in that: A first plug-in slot (1-3) formed by extrusion is provided on the inner side of the bottom wall of the first vertical portion (1-1).

3. The split aluminum alloy door sill beam assembly structure according to claim 2, characterized in that: The first connecting device comprises a battery tray side beam mounting nut plate (8), a battery tray side beam mounting nut (9), a battery tray side beam mounting sleeve (10) and a battery tray side beam mounting bolt (11); the battery tray side beam mounting nut (9) is welded to the battery tray side beam mounting nut plate (8), and the battery tray side beam mounting nut plate (8) is provided with a through hole at a position corresponding to the battery tray side beam mounting nut (9); the battery tray side beam mounting nut plate (8) is plugged into the first plug-in card slot (1-3); a through hole is provided at a position corresponding to the battery tray side beam mounting nut (9) on the bottom wall of the first vertical portion (1-1); the battery tray side beam mounting sleeve (10) is arranged on the battery tray side beam (12); and the battery tray side beam mounting bolt (11) passes through the battery tray side beam mounting sleeve (10), the through hole on the bottom wall of the first vertical portion (1-1) and the through hole on the battery tray side beam mounting nut plate (8), and then is threadedly connected with the battery tray side beam mounting nut (9).

4. The split aluminum alloy door sill beam assembly structure according to claim 3 is characterized in that: The battery tray side beam mounting nut plate (8) is connected to the bottom wall of the first vertical portion (1-1) via a battery tray side beam mounting rivet (7), and a plurality of battery tray side beam mounting nuts (9) are welded to the battery tray side beam mounting nut plate (8), and the plurality of battery tray side beam mounting nuts (9) are evenly arranged radially along the battery tray side beam mounting nut plate (8).

5. The split aluminum alloy door sill beam assembly structure according to claim 1, characterized in that: An extruded second plug-in slot (1-4) is provided on the inner side of a side wall of the first horizontal portion (1-2) close to the second vertical portion (2-1).

6. The split aluminum alloy door sill beam assembly structure according to claim 5, characterized in that: The second connecting device comprises an outer sill beam mounting nut plate (4), an outer sill beam mounting nut (5) and an outer sill beam mounting bolt (6); the outer sill beam mounting nut (5) is welded to the outer sill beam mounting nut plate (4), and the outer sill beam mounting nut plate (4) is provided with a through hole at a position corresponding to the outer sill beam mounting nut (5); the outer sill beam mounting nut plate (4) is plugged into the second plug-in card slot (1-4); a through hole is provided at a position corresponding to the outer sill beam mounting nut (5) on the side wall of the first horizontal portion (1-2); and a through hole is provided at a position corresponding to the outer sill beam mounting nut (5) on the left and right side walls of the second vertical portion (2-1) and at a position corresponding to the outer sill beam mounting nut (5); and the outer sill beam mounting bolt (6) passes through the through holes on the left and right side walls of the second vertical portion (2-1) and the through hole on the side wall of the first horizontal portion (1-2) and is then threadedly connected to the outer sill beam mounting nut (5).

7. The split aluminum alloy door sill beam assembly structure according to claim 6, characterized in that: The outer sill beam mounting nut plate (5) is connected to the side wall of the first horizontal portion (1-2) via an outer sill beam mounting nut plate rivet (3), a plurality of the outer sill beam mounting nuts (5) are welded to the outer sill beam mounting nut plate (4), and the plurality of the outer sill beam mounting nuts (5) are evenly arranged radially along the outer sill beam mounting nut plate (4).

8. The split aluminum alloy door sill beam assembly structure according to claim 1, characterized in that: A first reinforcing rib is provided at the connection between the first vertical portion (1-1) and the first horizontal portion (1-2), a second reinforcing rib arranged in parallel is provided inside the first horizontal portion (1-2), the first vertical portion (1-1) and the second vertical portion (2-1) are connected via two second connecting devices, the two second connecting devices are respectively arranged at the upper and lower sides of the second reinforcing rib, a third reinforcing rib arranged vertically and two fourth reinforcing ribs arranged horizontally are provided inside the first vertical portion (1-1), and the first connecting device is connected and arranged between the first reinforcing rib and the third reinforcing rib; A fifth reinforcing rib is provided at the connection between the second vertical portion (2-1) and the second horizontal portion (2-2), and two sixth reinforcing ribs arranged in parallel are provided inside the second vertical portion (2-1).

9. The split aluminum alloy door sill beam assembly structure according to claim 1, characterized in that: An inner sill beam wing edge is provided at the upper outer side of the side wall of the first vertical portion (1-1), and the lower vehicle body floor (14) and the lower vehicle body floor cross beam (15) are both connected to the inner sill beam wing edge by welding.

10. The split aluminum alloy door sill beam assembly structure according to claim 1, characterized in that: An outer sill beam wing edge is provided on the outer side of the upper wall of the second horizontal portion (2-2), and the outer sill beam wing edge is arranged on the extension line of the side wall of the second horizontal portion (2-2); the side B-pillar comprises a side B-pillar outer panel (16) and a side B-pillar inner panel (17); the side B-pillar outer panel (16) and the side B-pillar inner panel (17) are welded together to form the side B-pillar with a cavity; the side B-pillar outer panel (16) is connected to the side wall of the second vertical portion (2-1) by a side B-pillar outer panel FDS rivet (18). The side B-pillar inner plate (17) is welded with a side B-pillar inner plate convex welding square nut (19) on the lower side, the side B-pillar inner plate (17) is provided with a through hole at a position corresponding to the side B-pillar inner plate convex welding square nut (19), the outer sill beam wing edge and the side B-pillar inner plate convex welding square nut (19) are provided with a through hole at a position corresponding to the side B-pillar inner plate convex welding square nut (19), and the side B-pillar inner plate mounting bolt (20) passes through the through hole of the outer sill beam wing edge and the through hole of the side B-pillar inner plate (17), and is then screwed with the side B-pillar inner plate convex welding square nut (19).

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