C-pillar door sill beam connection structure and automobile

Abstract

The present invention belongs to the technical field of automobile structure, and specifically relates to a C-pillar sill beam connection structure and an automobile, wherein the C-pillar sill beam connection structure comprises a sill beam, a rear longitudinal beam, a lower connecting plate of an outer wheel cover, a front sealing plate of a rear longitudinal beam, and a lower reinforcing plate of a C-pillar, wherein the rear longitudinal beam is connected to the inner side of the sill beam, the bottom of the lower reinforcing plate of the C-pillar is connected to the outer side of the sill beam, the lower connecting plate of the outer wheel cover is connected to the front end of the lower reinforcing plate of the C-pillar, and the bottom of the lower connecting plate of the outer wheel cover abuts against the top of the sill beam, the front sealing plate of the rear longitudinal beam is connected to the rear longitudinal beam, the front sealing plate of the rear longitudinal beam is arranged on the inner side of the lower connecting plate of the outer wheel cover, and the bottom of the front sealing plate of the rear longitudinal beam is connected to the sill beam. The C-pillar sill beam connection structure provided by the present invention improves the connection strength stiffness and modal amplitude of the rear end of the sill beam, and improves the sealing performance of the connection between the lower end of the lower reinforcing plate of the C-pillar of the vehicle body and the sill beam.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile structures, and in particular relates to a C-pillar door sill beam connection structure and an automobile. Background Art

[0002] In the current all-aluminum car body, the parts where the C-pillar and the sill beam overlap are basically made of the same aluminum material, so the connection is relatively easy to achieve. In a steel-aluminum hybrid car body, for example, the lower body is aluminum and the upper body is steel, which puts forward new design requirements for the design of the C-pillar and the sill beam. Since the sill beam is an extruded part, when it is connected to the upper body, in order to ensure welding, the inner panel of the wheel cover is partially cut off, resulting in incomplete sealing between the inner panel of the wheel cover and the sill beam, and a weak connection between the C-pillar and the sill beam. The lower end of the C-pillar overlaps less with the sill beam, and the structure is weak, resulting in insufficient connection strength at the rear end of the sill beam; the inner panel of the rear wheel cover is cut off, resulting in poor sealing at the rear end of the sill beam. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to provide a C-pillar sill beam connection structure and a car in view of the problems of insufficient connection strength and poor sealing of the rear end of the existing car body-in-white sill beam.

[0004] To solve the above-mentioned technical problems, on the one hand, an embodiment of the present invention provides a C-pillar sill beam connection structure, including a sill beam, a rear longitudinal beam, a lower connecting plate of an outer wheel housing, a front cover plate of a rear longitudinal beam and a lower reinforcement plate of a C-pillar, wherein the rear longitudinal beam is connected to the inner side of the sill beam, the bottom of the lower reinforcement plate of the C-pillar is connected to the outer side of the sill beam, the lower connecting plate of the outer wheel housing is connected to the front end of the lower reinforcement plate of the C-pillar, and the bottom of the lower connecting plate of the outer wheel housing abuts against the top of the sill beam, the front cover plate of the rear longitudinal beam is connected to the rear longitudinal beam, the front cover plate of the rear longitudinal beam is arranged on the inner side of the lower connecting plate of the outer wheel housing, and the bottom of the front cover plate of the rear longitudinal beam is connected to the sill beam.

[0005] According to the C-pillar sill beam connection structure provided by the present invention, the rear longitudinal beam is directly connected to the inner side of the sill beam, and the C-pillar lower reinforcement plate is directly connected to the outer side of the sill beam, thereby improving the connection strength stiffness and modal amplitude of the rear end of the sill beam, and at the same time, an outer wheel cover lower connection plate and a rear longitudinal beam front sealing plate are provided, and the gap between the C-pillar lower reinforcement plate, the sill beam and the front end of the rear longitudinal beam is sealed by the outer wheel cover lower connection plate and the rear longitudinal beam front sealing plate, thereby improving the sealing of the connection between the lower end of the C-pillar lower reinforcement plate of the vehicle body and the sill beam, increasing the overlapping points, and ensuring the processability and strength of the overlapping between the C-pillar lower reinforcement plate and the sill beam.

[0006] Optionally, the top of the C-pillar lower reinforcement plate is used to overlap with the C-pillar, the bottom of the C-pillar lower reinforcement plate forms an overlapping surface, the overlapping surface is fixedly connected to the outer surface of the door sill beam, and the C-pillar lower reinforcement plate is provided with a mass reduction hole.

[0007] Optionally, the lower connecting plate of the outer wheel housing is an arc-shaped structure, and a fifth flange is formed on the inner side of the lower connecting plate of the outer wheel housing for overlapping with the front sealing plate of the rear longitudinal beam, and a sixth flange is formed on the bottom of the lower connecting plate of the outer wheel housing, and the sixth flange abuts against the top surface of the door sill beam.

[0008] Optionally, the front cover plate of the rear longitudinal beam is located at the top corner position of the door sill beam, and the bottom of the front cover plate of the rear longitudinal beam is formed with a first flange and a second flange, the first flange abuts against the top surface of the door sill beam, the second flange abuts against the inner side surface of the door sill beam, the inner side of the front cover plate of the rear longitudinal beam is formed with a third flange for overlapping with the rear longitudinal beam, and the outer side of the front cover plate of the rear longitudinal beam is formed with a fourth flange for overlapping with the fifth flange.

[0009] Optionally, the door sill beam is an aluminum extrusion part, the rear longitudinal beam is an aluminum casting, and the lower connecting plate of the outer wheel housing, the front cover plate of the rear longitudinal beam, and the lower reinforcement plate of the C-pillar are all steel sheet metal parts.

[0010] Optionally, the C-pillar sill beam connection structure also includes a rear longitudinal beam front connecting plate, which is located on the inner side of the C-pillar lower reinforcement plate, a cavity is formed between the rear longitudinal beam front connecting plate and the C-pillar lower reinforcement plate, the bottom of the rear longitudinal beam front connecting plate is bent to form a connecting plate portion for connecting to the rear longitudinal beam, and the front end of the rear longitudinal beam front connecting plate is connected to the rear longitudinal beam front sealing plate.

[0011] Optionally, the door sill beam has an inner cavity, and a plurality of reinforcing ribs are formed in the inner cavity.

[0012] Optionally, the C-pillar sill beam connection structure also includes a side outer panel, and the side outer panel is connected to the outer side of the C-pillar lower reinforcement plate and the outer wheel house lower connection plate.

[0013] Optionally, the C-pillar sill beam connection structure also includes an outer wheel cover, which is connected to the top of the outer wheel cover lower connecting plate, and the rear end of the outer wheel cover overlaps the front end of the top of the C-pillar lower reinforcement plate.

[0014] On the other hand, an embodiment of the present invention further provides a car, comprising the C-pillar sill beam connection structure as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the outer structure of the C-pillar sill beam connection structure provided by an embodiment of the present invention;

[0016] Figure 2 is another outer structural schematic diagram of the C-pillar sill beam connection structure provided by an embodiment of the present invention;

[0017] Figure 3 is another outer structural schematic diagram of the C-pillar sill beam connection structure provided by an embodiment of the present invention;

[0018] Figure 4 is a structural schematic diagram of the upper part of the C-pillar sill beam connection structure provided by an embodiment of the present invention;

[0019] Figure 5 is a schematic diagram of the inner structure of the C-pillar sill beam connection structure provided by an embodiment of the present invention;

[0020] Figure 6 is a schematic structural diagram of a C-pillar sill beam connection structure and a rear longitudinal beam provided by an embodiment of the present invention;

[0021] Figure 7 : is a schematic structural diagram of a front sealing plate of a rear longitudinal beam of a C-pillar sill beam connection structure provided by an embodiment of the present invention;

[0022] Figure 8 1 is a schematic structural diagram of a connecting plate under an outer wheelhouse of a C-pillar sill beam connecting structure provided by an embodiment of the present invention;

[0023] Fig. 9 : is a schematic structural diagram of a C-pillar lower reinforcement plate of a C-pillar sill beam connection structure provided by an embodiment of the present invention;

[0024] Fig.10 It is a schematic structural diagram of a front connecting plate of a rear longitudinal beam of a C-pillar sill beam connecting structure provided by an embodiment of the present invention.

[0025] The reference numerals in the drawings of the specification are as follows:

[0026] 1. C-pillar lower reinforcement plate; 11. lap joint surface; 12. mass reduction hole; 13. first connection hole;

[0027] 2. Front cover of rear longitudinal beam; 21. First flange; 22. Second flange; 23. Third flange; 24. Fourth flange;

[0028] 3. Connecting plate under outer wheel housing; 31. Fifth flange; 32. Sixth flange; 33. Seventh flange;

[0029] 4. rear longitudinal beam; 41. supporting part;

[0030] 5. Sill beam; 51. Inner cavity; 52. Reinforcement rib; 53. Bolt connection point;

[0031] 6. Outer wheel cover;

[0032] 7. Front connecting plate of rear longitudinal beam;

[0033] 8. Side outer panels. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships of the body-in-white. For example, "front" and "rear" refer to the length direction of the body-in-white, and "left" and "right" refer to the width direction of the body-in-white. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] See also Figures 1 to 5 As shown, an embodiment of the present invention provides a C-pillar sill beam connection structure, including a sill beam 5, a rear longitudinal beam 4, a wheel housing lower connecting plate 3, a rear longitudinal beam front cover plate 2 and a C-pillar lower reinforcing plate 1, wherein the rear longitudinal beam 4 is connected to the inner side of the sill beam 5, the bottom of the C-pillar lower reinforcing plate 1 is connected to the outer side of the sill beam 5, the wheel housing lower connecting plate 3 is connected to the front end of the C-pillar lower reinforcing plate 1, and the bottom of the wheel housing lower connecting plate 3 abuts against the top of the sill beam 5, the rear longitudinal beam front cover plate 2 is connected to the rear longitudinal beam 4, the rear longitudinal beam front cover plate 2 is arranged on the inner side of the wheel housing lower connecting plate 3, and the bottom of the rear longitudinal beam front cover plate 2 is connected to the sill beam 5.

[0037] According to the C-pillar sill beam connection structure provided by the present invention, the rear longitudinal beam 4 is directly connected to the inner side of the sill beam 5, and the C-pillar lower reinforcement plate 1 is directly connected to the outer side of the sill beam 5, thereby improving the connection strength stiffness and modal amplitude of the rear end of the sill beam 5, and at the same time, an outer wheel cover lower connecting plate 3 and a rear longitudinal beam front sealing plate 2 are provided, the outer wheel cover lower connecting plate 3 is respectively connected to the sill beam 5 and the C-pillar lower reinforcement plate 1, the rear longitudinal beam front sealing plate 2 is respectively connected to the sill beam 5 and the rear longitudinal beam 4, and the rear longitudinal beam front sealing plate 2 is located on the inner side of the outer wheel cover lower connecting plate 3, thereby achieving the sealing of the C-pillar lower reinforcement plate 1, the sill beam 5 and the front end gap of the rear longitudinal beam 4, improving the sealing of the connection between the lower end of the C-pillar lower reinforcement plate 1 of the vehicle body and the sill beam 5, increasing the overlapping points, and ensuring the processability and strength of the overlapping between the C-pillar lower reinforcement plate 1 and the sill beam 5.

[0038] like Fig. 9As shown, in one embodiment, the top of the C-pillar lower reinforcement plate 1 is used to overlap with the C-pillar, and the bottom of the C-pillar lower reinforcement plate 1 is formed with an overlapping surface 11, and the overlapping surface 11 is fixedly connected to the outer side surface of the sill beam 5. The shape of the overlapping surface 11 is adapted to the outer side surface of the sill beam 5, and a plurality of first connecting holes 13 are arranged at intervals on the inner edge of the overlapping surface 11, and a plurality of second connecting holes (not shown) are arranged at corresponding positions of the sill beam 5. By arranging hot-melt self-tapping screws FDS to pass through the first connecting holes 13 and the second connecting holes, the C-pillar lower reinforcement plate 1 is fixed to the sill beam 5, so as to achieve multiple connections between the C-pillar lower reinforcement plate 1 and the sill beam 5, effectively improve the strength of the connection between the C-pillar lower reinforcement plate 1 and the sill beam 5, and then improve the torsional stiffness, modal, side impact and other performances of the vehicle body, and the C-pillar lower reinforcement plate 1 is provided with a weight reduction hole 12.

[0039] like Figure 1 and Figure 8 As shown, in one embodiment, the lower connecting plate 3 of the outer wheel housing is an arc-shaped structure, and a fifth flange 31 is formed on the inner side of the lower connecting plate 3 of the outer wheel housing for overlapping with the front cover plate 2 of the rear longitudinal beam, and a sixth flange 32 is formed on the bottom of the lower connecting plate 3 of the outer wheel housing, and the sixth flange 32 abuts against the top surface of the door sill beam 5.

[0040] The lower connecting plate 3 of the outer wheel cover is used to form a lower extension of the outer wheel cover 6, and the lower connecting plate 3 of the outer wheel cover is used to seal the gap between the door sill beam 5 and the lower reinforcing plate 1 of the C-pillar. Specifically, the fifth flange 31 is used to fit and seal with the outer side of the front sealing plate 2 of the rear longitudinal beam, and the sixth flange 32 is used to fit and seal with the top surface of the door sill beam 5.

[0041] like Figure 3 and Figure 7 As shown, in one embodiment, the front cover plate 2 of the rear longitudinal beam is located at the top corner position of the door sill beam 5, and the bottom of the front cover plate 2 of the rear longitudinal beam is formed with a first flange 21 and a second flange 22, the first flange 21 abuts against the top surface of the door sill beam 5, the second flange 22 abuts against the inner side surface of the door sill beam 5, and the second flange 22 and the door sill beam 5 are connected to each other through a bolt connection point 53 on the inner side surface of the door sill beam 5, the inner side of the front cover plate 2 of the rear longitudinal beam is formed with a third flange 23 for overlapping with the rear longitudinal beam 4, and the outer side of the front cover plate 2 of the rear longitudinal beam is formed with a fourth flange 24 for overlapping with the fifth flange 31.

[0042] The rear longitudinal beam front sealing plate 2 is used to seal the gap between the door sill beam 5 and the rear longitudinal beam 4. Specifically, the first flange 21 and the second flange 22 are used to fit and seal with the surface of the door sill beam 5, the third flange 23 is used to fit and seal with the surface of the rear longitudinal beam 4, and the fourth flange 24 is used to fit and seal with the side of the lower connecting plate 3 of the outer wheel cover.

[0043] The C-pillar sill beam connection structure provided by the present invention is a steel-aluminum overlap structure. In one embodiment, the sill beam 5 is an aluminum extrusion part, and the rear longitudinal beam 4 is an aluminum casting, which can ensure the supporting strength while reducing the weight of the body in white. The lower connecting plate 3 of the outer wheel housing, the front cover plate 2 of the rear longitudinal beam, and the lower reinforcing plate 1 of the C-pillar are all steel sheet metal parts, which have a good structural strength enhancement effect. The structure is aimed at the characteristics of a hybrid structure body with a steel upper body and an aluminum lower body. While ensuring the co-linearity with the traditional steel body assembly production line, the connection of the steel-aluminum hybrid structure at the lower end of the C-pillar is achieved through the overlap design of the front cover plate 2 of the rear longitudinal beam and the lower connecting plate 3 of the outer wheel housing.

[0044] like Figure 6 , which is a schematic structural diagram of the rear longitudinal beam 4.

[0045] like Figure 3 As shown, the threshold beam 5 is connected to the rear longitudinal beam 4 by bolts. Specifically, the threshold beam 5 is provided with three bolt connection sites 53 for connecting with the rear longitudinal beam 4, wherein two of the bolt connection sites 53 are located at the top of the threshold beam 5, and one of the bolt connection sites 53 is located at the inner side of the threshold beam 5. Other components are connected by SPR riveting, hot melt self-tapping FDS connection, bolt connection, structural adhesive bonding, spot welding connection, etc.

[0046] like Figure 3 , Figure 5 and Fig.10 As shown, in one embodiment, the C-pillar sill beam connection structure also includes a rear longitudinal beam front connecting plate 7, the rear longitudinal beam front connecting plate 7 is located on the inner side of the C-pillar lower reinforcement plate 1, a cavity is formed between the rear longitudinal beam front connecting plate 7 and the C-pillar lower reinforcement plate 1, the bottom of the rear longitudinal beam front connecting plate 7 is bent to form a connecting plate portion for connecting to the rear longitudinal beam 4, correspondingly, a support portion 41 for connecting to the rear longitudinal beam front connecting plate 7 is formed on the rear longitudinal beam 4, and the front end of the rear longitudinal beam front connecting plate 7 is connected to the rear longitudinal beam front sealing plate 2.

[0047] When a side collision occurs, the force is transmitted to the door sill beam 5, the upper end of the C-pillar and the rear longitudinal beam 4 through the cavity structure formed between the front connecting plate 7 of the rear longitudinal beam and the lower reinforcing plate 1 of the C-pillar, thereby effectively improving the torsional stiffness, modal and side collision performance of the vehicle body.

[0048] like Figure 1 As shown, the porch beam is an aluminum extrusion, and the threshold beam 5 has an inner cavity 51 in which a plurality of reinforcing ribs 52 are formed. The inner cavity 51 can effectively reduce the weight of the threshold beam 5 , and the reinforcing ribs 52 are used to increase the strength of the threshold beam 5 .

[0049] like Figure 4 As shown, the C-pillar sill beam connection structure also includes a side outer panel 8, and the side outer panel 8 is connected to the outer side of the C-pillar lower reinforcement plate 1 and the outer wheel house lower connection plate 3.

[0050] A seventh flange 33 is formed on the outer side of the lower connecting plate 3 of the outer wheel housing, and the side outer panel 8 overlaps with the seventh flange 33. The fifth flange 31, the sixth flange 32 and the seventh flange 33 are continuous flange structures surrounding the outer edge of the lower connecting plate 3 of the outer wheel housing.

[0051] like Figure 2 As shown, the C-pillar sill beam connection structure also includes an outer wheel cover 6, which is connected to the top of the outer wheel cover lower connecting plate 3, and the rear end of the outer wheel cover 6 overlaps the front end of the top of the C-pillar lower reinforcement plate 1.

[0052] It should be noted that the above-mentioned C-pillar and sill beam connection structure is only described for one side structure of the body-in-white. The traditional body-in-white has two C-pillars and two sill beams 5 that are symmetrical to each other. Therefore, two sets of the C-pillar and sill beam connection structures can be symmetrically arranged at the rear end of the body-in-white.

[0053] In a specific implementation process, the C-pillar sill beam connection structure provided by the present invention can be assembled in the following manner:

[0054] First, the rear longitudinal beam front cover plate 2, the rear longitudinal beam 4 and the rear longitudinal beam front connecting plate 7 are connected by SPR riveting and hot-melt self-tapping screws FDS to form a rear longitudinal beam 4 assembly, and the door sill beam 5 and the rear longitudinal beam 4 assembly are connected by hot-melt self-tapping screws FDS, bolts and structural adhesive to form a lower body longitudinal beam.

[0055] The C-pillar lower reinforcement plate 1 and the wheel housing lower connecting plate 3 are connected to the wheel housing 6 by spot welding, and then connected to the side panel outer plate 8 to form the upper vehicle body.

[0056] Then, the upper body is buckled onto the longitudinal beam of the lower body, and connected and assembled by hot-melt self-tapping screws FDS and structural adhesive to obtain a body in white.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A C-pillar sill beam connection structure, characterized in that: It includes a sill beam, a rear longitudinal beam, a lower connecting plate of an outer wheel housing, a front sealing plate of a rear longitudinal beam and a lower reinforcing plate of a C-pillar, wherein the rear longitudinal beam is connected to the inner side of the sill beam, the bottom of the lower reinforcing plate of the C-pillar is connected to the outer side of the sill beam, the lower connecting plate of the outer wheel housing is connected to the front end of the lower reinforcing plate of the C-pillar, and the bottom of the lower connecting plate of the outer wheel housing abuts against the top of the sill beam, the front sealing plate of the rear longitudinal beam is connected to the rear longitudinal beam, the front sealing plate of the rear longitudinal beam is arranged on the inner side of the lower connecting plate of the outer wheel housing, the bottom of the front sealing plate of the rear longitudinal beam is connected to the sill beam, the front sealing plate of the rear longitudinal beam is used to seal the gap between the sill beam and the rear longitudinal beam, and the sill beam has an inner cavity.

2. The C-pillar sill beam connection structure according to claim 1, characterized in that: The top of the C-pillar lower reinforcement plate is used to overlap with the C-pillar, the bottom of the C-pillar lower reinforcement plate forms an overlapping surface, the overlapping surface is fixedly connected to the outer side surface of the door sill beam, and the C-pillar lower reinforcement plate is provided with a mass reduction hole.

3. The C-pillar sill beam connection structure according to claim 1, characterized in that: The lower connecting plate of the outer wheel cover is an arc-shaped structure, and a fifth flange is formed on the inner side of the lower connecting plate of the outer wheel cover for overlapping with the front sealing plate of the rear longitudinal beam. A sixth flange is formed on the bottom of the lower connecting plate of the outer wheel cover, and the sixth flange abuts against the top surface of the door sill beam.

4. The C-pillar sill beam connection structure according to claim 3, characterized in that: The front cover plate of the rear longitudinal beam is located at the top corner position of the door sill beam, and the bottom of the front cover plate of the rear longitudinal beam is formed with a first flange and a second flange, the first flange abuts against the top surface of the door sill beam, and the second flange abuts against the inner side surface of the door sill beam, and the inner side of the front cover plate of the rear longitudinal beam is formed with a third flange for overlapping with the rear longitudinal beam, and the outer side of the front cover plate of the rear longitudinal beam is formed with a fourth flange for overlapping with the fifth flange.

5. The C-pillar sill beam connection structure according to claim 1, characterized in that: The door sill beam is an aluminum extrusion part, the rear longitudinal beam is an aluminum casting part, and the lower connecting plate of the outer wheel housing, the front sealing plate of the rear longitudinal beam, and the lower reinforcing plate of the C-pillar are all steel sheet metal parts.

6. The C-pillar sill beam connection structure according to claim 1, characterized in that: The C-pillar sill beam connection structure also includes a rear longitudinal beam front connection plate, which is located on the inner side of the C-pillar lower reinforcement plate, a cavity is formed between the rear longitudinal beam front connection plate and the C-pillar lower reinforcement plate, the bottom of the rear longitudinal beam front connection plate is bent to form a connection plate portion for connecting to the rear longitudinal beam, and the front end of the rear longitudinal beam front connection plate is connected to the rear longitudinal beam front sealing plate.

7. The C-pillar sill beam connection structure according to claim 1, characterized in that: The C-pillar sill beam connection structure also includes a side outer panel, and the side outer panel is connected to the outer side of the C-pillar lower reinforcement plate and the outer wheel house lower connection plate.

8. The C-pillar sill beam connection structure according to claim 1, characterized in that: The C-pillar sill beam connection structure also includes an outer wheel cover, which is connected to the top of the outer wheel cover lower connecting plate, and the rear end of the outer wheel cover overlaps the front end of the top of the C-pillar lower reinforcement plate.

9. A car, characterized in that: It comprises a C-pillar sill beam connection structure as described in any one of claims 1 to 8.

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