Automobile lower body die-casting structure

Abstract

The present application provides a die-cast structure for an automobile underbody, wherein the die-cast structure is integrally die-cast and includes a front floor and a nested component. The front floor includes a hollow area, and the nested component is disposed within the hollow area of ​​the front floor and connected to the front floor. The nested component and the front floor can be cut and separated. The nested component is disposed within the hollow area and die-cast integrally with the automobile underbody. After die-casting, the nested component is cut and separated and applied to the automobile. This improves the material utilization of the die-cast structure, saves molds for the nested component, and thus saves costs and improves efficiency. Furthermore, the commonality of the nested component can be increased, reducing development costs.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a die-cast structure of an automobile lower body. Background Art

[0002] The underbody is the load-bearing component of a vehicle's overall structure, and its structural design significantly impacts the ease and cost of manufacturing. To achieve lightweighting, new energy vehicles often utilize an integrated die-casting process. Die-casting each component individually creates a high cost and inefficiencies. Summary of the Invention

[0003] The present application provides a die-cast structure for an automobile lower body to solve at least some of the problems in the related art.

[0004] In a first aspect, the present application provides an automobile underbody structure, wherein the automobile underbody die-cast structure is integrally die-cast and includes a front floor and a nested piece; the front floor includes a hollow area, the nested piece is arranged in the hollow area of ​​the front floor and is connected to the front floor, and the nested piece and the front floor can be cut and separated.

[0005] Optionally, the front floor includes a first sill beam and a second sill beam arranged opposite to each other, and a first cross beam and a second cross beam connecting the first sill beam and the second sill beam, the first sill beam, the second sill beam, the first cross beam and the second cross beam enclose a hollow area; the nested piece extends between the first sill beam and the second sill beam, or between the first cross beam and the second cross beam.

[0006] Optionally, the nested parts are offset from the gating system used for the die casting.

[0007] Optionally, the nesting piece extends between the first threshold beam and the second threshold beam, and the nesting piece is located on a side of the gating system close to the first crossbeam; or

[0008] The nesting piece extends between the first cross beam and the second cross beam, and is located on a side of the gating system close to the first sill beam or a side of the second sill beam.

[0009] Optionally, the nested part extends between the first sill beam and the second sill beam, and the automobile lower body die-cast structure includes a first connecting part, a second connecting part and a third connecting part, the first connecting part connecting one end of the nested part and the first sill beam, the second connecting part connecting the other end of the nested part and the second sill beam, and the third connecting part connecting the middle part of the nested part and the first cross beam.

[0010] Optionally, the width of the first cross beam is greater than the width of the first threshold beam and the second threshold beam; and / or

[0011] The length of the first cross member is less than the length of the first sill member and the second sill member; and / or

[0012] A distance between the first cross beam and the second cross beam is greater than a distance between the first sill beam and the second sill beam.

[0013] Optionally, it includes a front cabin and a rear floor, the front cabin includes a front longitudinal beam and a front cross beam, and the rear floor includes a rear longitudinal beam and a rear cross beam; the front longitudinal beam is located at both ends of the first cross beam and is connected to the first cross beam, and the front longitudinal beam is connected to the first sill beam and the second sill beam; the rear longitudinal beam is located at both ends of the second cross beam, and the rear longitudinal beam is connected to the first sill beam and the second sill beam, and there is a distance between the rear cross beam and the second cross beam.

[0014] Optionally, the nested part includes an S-shaped beam, the S-shaped beam includes a first sub-beam and a second sub-beam, the first sub-beam is a straight structure or a curved structure, the second sub-beam is a curved structure, the curvature of the second sub-beam is greater than the curvature of the first sub-beam, the two ends of the first sub-beam and the second sub-beam are connected to each other, one end where the first sub-beam and the second sub-beam are connected is connected to the first connecting part, the other end where the first sub-beam and the second sub-beam are connected is connected to the second connecting part, and the third connecting part connects the middle part of the first sub-beam and the first crossbeam.

[0015] Optionally, an additional nesting piece is included, which is provided in the hollow area of ​​the front floor and connected to the front floor. The additional nesting piece and the front floor can be cut and separated, and the additional nesting piece is connected to the first door sill beam.

[0016] Optionally, a fourth connecting portion is included, the fourth connecting portion connects the first sill beam and the additional nesting piece, and the first connecting portion connects the nesting piece, the additional nesting piece and the first sill beam.

[0017] The present application provides a die-cast structure for an automobile underbody, wherein the die-cast structure is integrally die-cast and includes a front floor and a nested component. The front floor includes a hollow area, and the nested component is disposed within the hollow area of ​​the front floor and connected to the front floor. The nested component and the front floor can be cut and separated. The nested component is disposed within the hollow area and die-cast integrally with the automobile underbody. After die-casting, the nested component is cut and separated and applied to the automobile. This improves the material utilization of the die-cast structure, saves molds for the nested component, and thus reduces costs and improves efficiency. Furthermore, the commonality of the nested component can be increased, reducing development costs.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the automobile lower body die-casting structure of the present application;

[0021] Figure 2 This is a schematic structural diagram of another embodiment of the automobile lower body die-casting structure of the present application;

[0022] Figure 3 It is a structural schematic diagram of the cabin shock-absorbing tower in which the S-beam of the present application is installed on the lower body of the automobile.

[0023] Reference numerals:

[0024] 1. Die-cast structure of the lower body of the vehicle; 2. Front floor; 3. Front engine compartment; 4. Rear floor; 5. Nested parts; 6. Hollow area; 7. Casting system; 8. Additional nested parts; 10. First connection part; 11. Second connection part; 12. Third connection part; 13. Fourth connection part; 20. First sill beam; 21. Second sill beam; 22. First cross beam; 23. Second cross beam; 30. Front longitudinal beam; 31. Front cross beam; 32. Shock tower; 40. Rear longitudinal beam; 41. Rear cross beam; 50. S-beam; 80. Lower end joint inside the B-pillar; 500. First sub-beam; 501. Second sub-beam. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0026] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the art to which this application belongs. The terms "first," "second," and similar words used in this specification and claims do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, the terms "a" or "an" and similar words do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "plurality" or "several" mean two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper" and similar words are for convenience only and are not intended to limit to a single position or spatial orientation. The terms "include" or "comprising" and similar words mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" and similar words are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect.

[0027] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0028] The present application provides a die-cast structure for an automobile underbody. The die-cast structure for an automobile underbody of the present application is described in detail below with reference to the accompanying drawings. The features of the following embodiments and implementations may be combined with each other unless they conflict.

[0029] refer to Figure 1 The embodiment shown, Figure 1This is a schematic diagram of the structure of an embodiment of the automobile underbody die-cast structure of the present application. This application provides an automobile underbody die-cast structure 1, wherein the automobile underbody die-cast structure 1 is integrally die-cast and includes a front floor panel 2 and a nesting element 5. The front floor panel 2 includes a hollow area 6. The nesting element 5 is located within this hollow area 6 and connected to the front floor panel 2. The nesting element 5 and the front floor panel 2 can be cut and separated. The automobile underbody has a cell-to-body (CTB) structure, where the battery pack upper housing integrates components such as the seat crossbeam and the front floor panel. Therefore, the front floor panel 2 area is hollow. The nesting element 5 may include die-cast parts for this vehicle model or for other vehicles. The nesting element 5 is placed within the hollow area 6 to form the automobile underbody die-cast structure 1, which is then die-cast integrally. After die-casting, the nesting element 5 is cut and separated and used in this vehicle model or other vehicles. This arrangement improves the material utilization of the automobile underbody die-cast structure 1, eliminates molds for the nesting element 5, and thus reduces costs and improves efficiency. In addition, the integration of the nesting part 5 and the lower body of the automobile by die-casting can improve the commonality of the nesting part 5 and reduce development costs.

[0030] In some embodiments, the front floor 2 includes a first sill beam 20 and a second sill beam 21 disposed opposite each other, and a first crossbeam 22 and a second crossbeam 23 connecting the first sill beam 20 and the second sill beam 21. The first sill beam 20, the second sill beam 21, the first crossbeam 22, and the second crossbeam 23 enclose a hollow region 6. The nesting element 5 extends between the first sill beam 20 and the second sill beam 21, or between the first crossbeam 22 and the second crossbeam 23. The first sill beam 20 and the second sill beam 21 are parallel to each other along the length of the vehicle's underbody, while the first crossbeam 22 and the second crossbeam 23 are parallel to each other along the width of the vehicle's underbody. The first sill beam 20, the second sill beam 21, the first crossbeam 22, and the second crossbeam 23 enclose the hollow region 6. Placing the nesting element 5 between the first sill beam 20 and the second sill beam 21, or between the first crossbeam 22 and the second crossbeam 23, meets the design requirements of the die-cast structure. Furthermore, this arrangement improves the overall stability of the die-cast structure 1 of the vehicle's underbody.

[0031] In some embodiments, the nested component 5 is staggered from the gating system 7 used for die-casting. The gating system 7 is located on a side adjacent to the second crossbeam 23. Based on the space allocated for the gating system 7 during the process, the nested component 5 is placed in the hollow area 6 of the front floor panel 2 to ensure that the nested component 5 meets the dimensional requirements and die-casting structural design requirements, and that the orthographic projection of the nested component 5 in the hollow area 6 does not overlap with the orthographic projection of the gating system 7 in the hollow area 6.

[0032] In some embodiments, the nested element 5 extends between the first crossbeam 22 and the second crossbeam 23, and is located on the side of the gating system 7 near the first sill beam 20 or the second sill beam 21. The nested element 5 is connected to the first crossbeam 22 and the second crossbeam 23 at both ends. The nested element 5 is positioned between the first sill beam 20 and the gating system 7, or between the second sill beam 21 and the gating system 7, avoiding the gating system 7. This arrangement meets dimensional space requirements and die-casting structural design requirements and improves the overall stability of the automobile underbody die-cast structure 1. In some embodiments, the nested element 5 extends between the first sill beam 20 and the second sill beam 21, and is located on the side of the gating system 7 near the first crossbeam 22. The nested element 5 is connected to the first sill beam 20 and the second sill beam 21 at both ends, and is positioned between the gating system 7 and the first crossbeam 22, avoiding the gating system 7. This arrangement provides a more rational spatial arrangement and enhances the overall stability of the automobile underbody die-cast structure 1 compared to nested elements 5 positioned between the first crossbeam 22 and the second crossbeam 23.

[0033] Specifically, the nested member 5 extends between the first and second sill beams 20 and 21. The automobile underbody die-cast structure 1 includes a first connecting portion 10, a second connecting portion 11, and a third connecting portion 12. The first connecting portion 10 connects one end of the nested member 5 to the first sill beam 20, the second connecting portion 11 connects the other end of the nested member 5 to the second sill beam 21, and the third connecting portion 12 connects the middle portion of the nested member 5 to the first crossbar 22. The first and second connecting portions 10, 11 connect the ends of the nested member 5 to the first and second sill beams 20, 21 in the width direction of the automobile underbody, while the third connecting portion 12 connects the middle portion of the nested member 5 to the first crossbar 22 in the length direction of the automobile underbody. After the automobile underbody die-cast structure 1 is die-cast, the first, second, and third connecting portions 10, 11, 12 are laser cut, and the nested member 5 is then applied to the automobile. The addition of the third connecting portion 12 between the middle portion of the nested member 5 and the first crossbar 22 improves the strength and stability of the automobile underbody die-cast structure 1.

[0034] Specifically, refer to Figure 1In the illustrated embodiment, the nesting element 5 includes an O-shaped beam 50, which comprises a first sub-beam 500 and a second sub-beam 501. The first sub-beam 500 can be straight or curved, while the second sub-beam 501 is curved, with a greater curvature than the first sub-beam 500. The first and second sub-beams 500 and 501 are connected at both ends. One end of the first and second sub-beams 500 and 501 is connected to a first connecting portion 10, and the other end of the first and second sub-beams 500 and 501 is connected to a second connecting portion 11. A third connecting portion 12 connects the middle portion of the first sub-beam 500 and the first crossbeam 22. The O-shaped beam 50 is typically mounted on a nacelle shock tower. Its size and structure meet the requirements of the nesting element 5. Therefore, the O-shaped beam 50 can be placed in the blank area 6, extending between the first and second sill beams 20 and 21. The O-shaped beam 50 is composed of the first and second sub-beams 500 and 501. The first sub-beam 500 and the second sub-beam 501 are connected at both ends, with the first connecting portion 10 and the second connecting portion 11 disposed at the junction of the first and second sub-beams 500 and 501. In some embodiments, the first sub-beam 500 is typically straight or slightly curved, while the second sub-beam 501 has a greater curvature than the first sub-beam 500. Therefore, the third connecting portion 12 is disposed between the first sub-beam 500 and the first crossbeam 22. This arrangement makes laser cutting easier and provides a more stable structure than placing the third connecting portion 12 between the second sub-beam 501 and the first crossbeam 22.

[0035] In some embodiments, the automobile underbody die-cast structure 1 includes an additional nested member 8 , which is positioned within the hollow region 6 of the front floor panel 2 and connected to the front floor panel 2. The additional nested member 8 and the front floor panel 2 can be cut and separated, and the additional nested member 8 is connected to the first sill beam 20 . The additional nested member 8 and the casting system 7 are staggered and positioned on the first sill beam 20 or the second sill beam 21 . This arrangement fully utilizes the space within the hollow region 6 , improves material utilization of the automobile underbody die-cast structure 1 , and eliminates molds for the nested member 5 , thereby reducing costs and improving efficiency.

[0036] In some embodiments, the fourth connecting portion 13 is further included, the fourth connecting portion 13 connects the first sill beam 20 and the additional nesting piece 8, and the first connecting portion 10 connects the nesting piece 5, the additional nesting piece 8 and the first sill beam 20. Figure 2 As shown, Figure 2This is a schematic diagram of another embodiment of the automotive underbody die-cast structure of the present application. In this embodiment, the additional nested component 8 is a B-pillar inner lower end joint 80. The fourth connecting portion 13 connects the B-pillar inner lower end joint 80 to the first sill beam 20 or the second sill beam 21. The B-pillar inner lower end joint 80 can be connected to the splayed beam 50 via the first connecting portion 10. This arrangement enhances the structural stability of the splayed beam 50 and the B-pillar inner lower end joint 80 within the front floor 2.

[0037] like Figure 1 and Figure 2 As shown, the width of the first cross member 22 is greater than that of the first sill beam 20 and the second sill beam 21. Since the first sill beam 20 and the second sill beam 21 are weaker than the first cross member 22, a nesting member 5 is provided between the first sill beam 20 and the second sill beam 21. This arrangement enhances the structural stability between the first sill beam 20 and the second sill beam 21.

[0038] Specifically, the length of the first crossbeam 22 is shorter than that of the first and second sill beams 20, 21, and the distance between the first and second crossbeams 22, 23 is longer than that between the first and second sill beams 20, 21. Positioning the nested member 5 between the first and second crossbeams 22, 23 requires a longer connecting portion than positioning the nested member 5 between the first and second sill beams 20, 21. Furthermore, the first and second sill beams 20, 21 are weaker than the first crossbeam 22. Positioning the nested member 5 between the first and second crossbeams 22, 23 does not improve the strength of the connection between the first and second sill beams 20, 21. Therefore, typically, connecting the nested member 5 between the first and second crossbeams 20, 21 can improve the strength and stability of the automobile underbody die-cast structure 1.

[0039] refer to Figures 1 to 3 The embodiment shown, Figure 3This is a schematic diagram of the structure of the cabin shock tower mounted on the underbody of a vehicle, using an "X" beam as the embodiment of the present application. The underbody die-cast structure 1 also includes a front cabin 3 and a rear floor 4. The front cabin 3 includes a front longitudinal beam 30 and a front cross beam 31, while the rear floor 4 includes a rear longitudinal beam 40 and a rear cross beam 41. The front longitudinal beams 30 are located at both ends of the first cross beam 22 and are connected to the first cross beam 22. The front longitudinal beams 30 are connected to the first and second sill beams 20 and 21. The rear longitudinal beams 40 are located at both ends of the second cross beam 23 and are connected to the first and second sill beams 20 and 21, with a distance between the rear cross beam 41 and the second cross beam 23. The rear cross beam 41, the second cross beam 23, and the two rear longitudinal beams 40 form another hollow area. However, this hollow area is relatively small, making it difficult to arrange the nested components 5 in this hollow area to meet the dimensional space requirements and die-casting structural design requirements. In addition, the width of the first crossbeam 22 is greater than the width of the second crossbeam 23 , and the connection between the nested member 5 and the first crossbeam 22 makes the structure more reliable.

[0040] refer to Figure 3 After the S-shaped beam 50 is laser cut from the hollow area 6 of the front floor 2, the two ends of the S-shaped beam 50 are installed on the shock towers 32 on both sides of the front engine compartment 3 to improve the torsional rigidity of the entire vehicle. Since the position of the S-shaped beam 50 will interfere with the assembly of the automotive parts, the S-shaped beam 50 cannot be directly set on the shock towers on both sides of the engine compartment. It is die-casted integrally with the lower body of the car. The S-shaped beam 50 is set in the hollow area 6 of the front floor 2 and cut and waited to be assembled on the shock towers 32 on both sides of the front engine compartment 3 at the appropriate time. Such an arrangement can improve the material utilization rate of the die-cast structure 1 of the lower body of the car, save the mold of the S-shaped beam 50, thereby saving costs and improving efficiency. In addition, the die-casting of the S-shaped beam 50 and the lower body of the car as one can improve the commonality of the S-shaped beam 50 and reduce development costs.

[0041] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0042] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A die-cast structure for the lower body of an automobile, characterized in that: The automobile lower body die-cast structure is integrally die-cast and includes a front floor and a nesting piece; the front floor includes a hollow area, the nesting piece is provided in the hollow area of ​​the front floor and is connected to the front floor, and the nesting piece and the front floor can be cut and separated; The front floor comprises a first sill beam and a second sill beam disposed opposite to each other, and a first cross beam and a second cross beam connecting the first sill beam and the second sill beam, wherein the first sill beam, the second sill beam, the first cross beam and the second cross beam enclose the hollow area; the nesting member extends between the first sill beam and the second sill beam, or between the first cross beam and the second cross beam; The nested member extends between the first sill beam and the second sill beam, and the automobile lower body die-cast structure includes a first connecting portion, a second connecting portion, and a third connecting portion, wherein the first connecting portion connects one end of the nested member and the first sill beam, the second connecting portion connects the other end of the nested member and the second sill beam, and the third connecting portion connects a middle portion of the nested member and the first cross beam; The nested part includes an eight-shaped beam, and the eight-shaped beam includes a first sub-beam and a second sub-beam, the first sub-beam is a straight structure or a curved structure, the second sub-beam is a curved structure, and the curvature of the second sub-beam is greater than the curvature of the first sub-beam, the first sub-beam and the second sub-beam are connected at both ends to each other, one end of the first sub-beam and the second sub-beam is connected to the first connecting part, the other end of the first sub-beam and the second sub-beam is connected to the second connecting part, and the third connecting part connects the middle part of the first sub-beam and the first crossbeam.

2. The automobile lower body die-casting structure according to claim 1, characterized in that: The nest is offset from the gating system used for the injection molding.

3. The automobile lower body die-casting structure according to claim 2, characterized in that: The nesting piece extends between the first sill beam and the second sill beam, and the nesting piece is located on a side of the gating system close to the first crossbeam; or The nesting piece extends between the first cross beam and the second cross beam, and is located on a side of the gating system close to the first sill beam or a side of the second sill beam.

4. The automobile lower body die-casting structure according to claim 1, characterized in that: The width of the first cross beam is greater than the width of the first sill beam and the second sill beam; and / or The length of the first cross beam is smaller than the length of the first sill beam and the second sill beam; and / or A distance between the first cross beam and the second cross beam is greater than a distance between the first sill beam and the second sill beam.

5. The automobile lower body die-casting structure according to claim 1 or 4, characterized in that: The vehicle comprises a front cabin and a rear floor, wherein the front cabin comprises a front longitudinal beam and a front cross beam, and the rear floor comprises a rear longitudinal beam and a rear cross beam; the front longitudinal beams are located at both ends of the first cross beam and are connected to the first cross beam, and the front longitudinal beams are connected to the first sill beam and the second sill beam; the rear longitudinal beams are located at both ends of the second cross beam and are connected to the first sill beam and the second sill beam, and there is a distance between the rear cross beam and the second cross beam.

6. The automobile lower body die-casting structure according to claim 1, characterized in that: The additional nesting piece is provided in the hollow area of ​​the front floor and is connected to the front floor. The additional nesting piece and the front floor can be cut and separated. The additional nesting piece is connected to the first door sill beam.

7. The automobile lower body die-casting structure according to claim 6, characterized in that: A fourth connection portion is included, wherein the fourth connection portion connects the first sill beam and the additional nesting piece, and the first connection portion connects the nesting piece, the additional nesting piece, and the first sill beam.

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