Vehicle body rear frame assembly

Abstract

A rear body frame assembly comprises a rear quarter inner panel casting and a roof rear cross beam connected with the rear quarter inner panel casting, the rear quarter inner panel casting comprises a rear quarter inner panel and a D-pillar joint which are integrally cast, and the roof rear cross beam is connected with the rear quarter inner panel casting through the D-pillar joint. The rear body frame assembly of the present application is designed by using a casting process, and multiple parts in the prior art are integrated into one, so that the structural integration degree is high, the number of parts is reduced, and the assembly precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile, in particular to a rear frame assembly of a vehicle body. BACKGROUND

[0002] The rear frame structure of the current vehicle body-in-white is mainly composed of steel parts, as shown in the drawings, a rear frame structure 10 of the existing vehicle body-in-white is formed by welding rear quarter inner panel 11, rear quarter reinforcement 12, D-pillar reinforcement 13, C-pillar reinforcement 14, top cover rear beam upper plate 15, top cover rear beam lower plate 16 and other steel stamping parts, the number of parts is relatively large, the structure is complex, the welding precision of the assembly is not high, and the steel frame structure needs to increase the parts at the D-pillar joint of the D-pillar reinforcement 13 to improve the rigidity and strength of the joint, therefore, it is necessary to provide a rear frame assembly of a vehicle body which has fewer parts, simple structure and high connection precision. Figure 1 The preceding description is to provide general background information and does not necessarily constitute the prior art.

[0003] SUMMARY

[0004] Therefore, the present application provides a rear frame assembly of a vehicle body which has simple structure and fewer parts.

[0005] The rear frame assembly of a vehicle body provided by the present application comprises a rear quarter inner panel casting and a top cover rear beam connected with the rear quarter inner panel casting, the rear quarter inner panel casting comprises a rear quarter inner panel and a D-pillar joint which are casted as a whole, and the top cover rear beam is connected with the rear quarter inner panel casting through the D-pillar joint.

[0006] Further, the rear quarter inner panel casting is an aluminum alloy casting, and the top cover rear beam is an aluminum alloy extrusion part.

[0007] Further, the rear quarter inner panel casting further comprises a rear quarter inner panel reinforcement and a quarter window, the quarter window is arranged on the rear quarter inner panel, the rear quarter inner panel reinforcement is connected with the upper part of the rear quarter inner panel, and the D-pillar joint is connected with the rear part of the rear quarter inner panel reinforcement and the upper part of the rear quarter inner panel.

[0008] Further, the D-pillar joint comprises a first beam support part and a second beam support part which protrudes out of the first beam support part in the transverse direction of the vehicle, the top cover rear beam is arranged on the first beam support part and the second beam support part, and is connected with the D-pillar joint through hot melt self-tapping screws and lock rivet rivets.

[0009] ​Further, the first cross beam support part comprises a first connecting part, a second connecting part below the first connecting part, and a third connecting part connected with the rear end of the first connecting part and the front end of the second connecting part, the rear roof cross beam comprises a first connecting plate, a second connecting plate, and a third connecting plate connected with the rear end of the first connecting plate and the front end of the second connecting plate, and the first connecting plate, the second connecting plate and the third connecting plate of the rear roof cross beam are respectively overlapped on the first connecting part, the second connecting part and the third connecting part of the first cross beam support part.

[0010] Further, the second cross beam support part comprises a fourth connecting part protruding out of the second connecting part along the width direction of the automobile, and a fifth connecting part extending upward from the front end of the fourth connecting part, the rear roof cross beam comprises a first reinforcing plate extending downward from the lower surface of the first connecting plate, and a second reinforcing plate extending rearward from the end of the first reinforcing plate, the first connecting plate and the third connecting plate protrude out of the first reinforcing plate and the second reinforcing plate along the width direction of the automobile, the second reinforcing plate and the first reinforcing plate are respectively overlapped on the fourth connecting part and the fifth connecting part of the second cross beam support part, and the two ends of the second reinforcing plate and the first reinforcing plate are respectively abutted against the first cross beam support part.

[0011] Further, the first connecting part of the first cross beam support part and the first connecting plate of the rear roof cross beam are connected by hot melt self-tapping screws, the second connecting part of the first cross beam support part and the second connecting plate of the rear roof cross beam are connected by lock riveting rivets, and the fourth connecting part of the second cross beam support part and the second reinforcing plate of the rear roof cross beam are connected by hot melt self-tapping screws.

[0012] Further, a cavity is formed among the first reinforcing plate, the second reinforcing plate, the first connecting plate and the third connecting plate, and the rear roof cross beam further comprises a third reinforcing plate arranged in the cavity and parallel to the second reinforcing plate and the first connecting plate.

[0013] Further, a first outer reinforcing rib extending downward and forward from the D-pillar joint to the rear shock absorber area and a plurality of second outer reinforcing ribs extending along the front-rear direction of the automobile are arranged on the outer surface of the rear quarter inner panel casting, the second outer reinforcing ribs are arranged from the top end of the rear quarter inner panel casting to the bottom end of the rear quarter inner panel casting, and the second outer reinforcing ribs and the first outer reinforcing rib intersect with each other.

[0014] Furthermore, the rear side panel casting has several third outer reinforcing ribs extending along the front-rear direction of the vehicle in front of the triangular window, and the several third outer reinforcing ribs are arranged from the top of the rear side panel casting to the bottom of the rear side panel casting.

[0015] This invention has at least one of the following beneficial effects:

[0016] 1. The rear frame assembly of the vehicle body of the present invention adopts an aluminum alloy extrusion and casting process design, integrating multiple parts of the prior art into two parts, resulting in a high degree of structural integration;

[0017] 2. Compared with the prior art, the present invention reduces the number of welded parts, thereby shortening the welding dimension chain, which helps to improve the connection accuracy, and also helps to reduce the number of molds and fixtures, thus reducing manufacturing costs;

[0018] 3. Compared with steel stamping parts, castings have a significant weight reduction effect and high material utilization. Moreover, due to the complete structure, there is no need for multiple welding points, which greatly improves the rigidity and strength of the rear frame assembly of the vehicle body of the present invention.

[0019] 4. The top cover rear crossbeam overlaps with the D-column joint to form a closed force transmission cavity. The first and second outer reinforcing ribs extend from the top of the rear inner panel casting to the bottom of the rear inner panel casting, forming a continuous force transmission path from top to bottom, making the overall structure more uniform in stress and more rational in force transmission. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the assembly structure of an existing rear frame assembly for a vehicle body.

[0021] Figure 2 This is a schematic diagram of the assembly structure of the rear frame assembly of the vehicle body provided in an embodiment of the present invention.

[0022] Figure 3 This is an exploded view of the rear frame assembly of the vehicle body provided in an embodiment of the present invention.

[0023] Figure 4 for Figure 3 The diagram shown is a structural schematic viewed from the inside of the vehicle body.

[0024] Figure 5 This is a structural schematic diagram of the rear side inner plate casting provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of the rear crossbeam of the top cover provided in an embodiment of the present invention.

[0026] Figure 7 for Figure 2 The diagram shown is a structural schematic when the structure is cut longitudinally. Detailed Implementation

[0027] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0028] like Figure 2 and Figure 3 As shown, the rear frame assembly of the vehicle body provided in this embodiment includes a rear side inner panel casting 20 and a roof rear crossbeam 30 connected to the rear side inner panel casting 20.

[0029] Among them, the rear side inner panel casting 20 is an aluminum alloy casting, and the top cover rear crossbeam 30 is an aluminum alloy extrusion.

[0030] Please refer to the following: Figure 5 The rear inner panel casting 20 includes a rear inner panel 21, a rear inner panel reinforcing plate 22, a D-pillar 23, and a D-pillar connector 24, all cast as a single piece. A triangular window 25 is provided on the rear inner panel 21. The rear inner panel reinforcing plate 22 is located above the triangular window 25 and connected to the upper part of the rear inner panel 21. The D-pillar 23 is located behind the triangular window 25 and connected to the rear part of the rear inner panel 21. The D-pillar connector 24 is located above the D-pillar 23 and connected to the upper part of the D-pillar 23, the rear part of the rear inner panel reinforcing plate 22, and the upper part of the rear inner panel 21. The rear crossbeam 30 of the roof is connected to the rear inner panel casting 20 via the D-pillar connector 24.

[0031] The D-pillar connector 24 includes a first crossbeam support 241 and a second crossbeam support 242 that protrudes from the first crossbeam support 241 along the width direction of the vehicle (i.e., the Y-direction of the vehicle). The rear crossbeam 30 of the roof is placed on the first crossbeam support 241 and the second crossbeam support 242 and is connected to the D-pillar connector 24 by hot-melt self-tapping screws and locking rivets.

[0032] Specifically, the first cross beam support portion 241 has a cross section in the automobile XZ direction in the shape of a "Z" character, which includes a first connecting portion 24a, a second connecting portion 24b located below the first connecting portion 24a, and a third connecting portion 24c connected to the rear end of the first connecting portion 24a and the front end of the second connecting portion 24b, in the present embodiment, the first connecting portion 24a is arranged in a direction substantially parallel to the ground, the second connecting portion 24b is parallel to the first connecting portion 24a, and the third connecting portion 24c is perpendicular to the first connecting portion 24a and the second connecting portion 24b. The second cross beam support portion 242 includes a fourth connecting portion 24d protruding from the second connecting portion 24b in the automobile width direction and a fifth connecting portion 24e extending upward from the front end of the fourth connecting portion 24d. The fourth connecting portion 24d is parallel to the second connecting portion 24b and slightly sunken compared to the second connecting portion 24b, and the length of the fourth connecting portion 24d in the automobile length direction (i.e., the automobile X direction) is substantially equal to the length of the first connecting portion 24a and the second connecting portion 24b in the same direction. The fifth connecting portion 24e is arranged perpendicularly to the fourth connecting portion 24d at the front end of the fourth connecting portion 24d, such that the fifth connecting portion 24e is arranged sunken in the automobile length direction compared to the third connecting portion 24c. In this way, an abutting surface arranged in the automobile XZ direction is formed between the second cross beam support portion 242 and the first cross beam support portion 241.

[0033] Please refer to Figure 6 and Figure 7 The roof rear cross beam 30 is formed by extruding an aluminum alloy plate as a whole, which includes a first connecting plate 30a, a second connecting plate 30b arranged behind the first connecting plate 30a and parallel to the first connecting plate 30a, and a third connecting plate 30c connected to the rear end of the first connecting plate 30a and the front end of the second connecting plate 30b, in the present embodiment, the first connecting plate 30a is parallel to the second connecting plate 30b, and the third connecting plate 30c is connected perpendicularly to the first connecting plate 30a and the second connecting plate 30b.

[0034] Further, the roof rear cross beam 30 includes a first reinforcing plate 30d extending downward from the lower surface of the first connecting plate 30a, and a second reinforcing plate 30e extending rearward from the end of the first reinforcing plate 30d. The first connecting plate 30a, the second connecting plate 30b, and the third connecting plate 30c protrude in the automobile width direction from the first reinforcing plate 30d and the second reinforcing plate 30e. A cavity is formed between the first reinforcing plate 30d, the second reinforcing plate 30e, the first connecting plate 30a, and the third connecting plate 30c, and a third reinforcing plate 30f is arranged in the middle of the cavity, connected to the first reinforcing plate 30d and the third connecting plate 30c, and parallel to the second reinforcing plate 30e and the first connecting plate 30a.

[0035] In assembly, the first connecting plate 30a, the second connecting plate 30b and the third connecting plate 30c of the roof rear cross beam 30 are respectively overlapped on the first connecting portion 24a, the second connecting portion 24b and the third connecting portion 24c of the first cross beam support portion 241, and the second reinforcing plate 30e and the first reinforcing plate 30d of the roof rear cross beam 30 are respectively overlapped on the fourth connecting portion 24d and the fifth connecting portion 24e of the second cross beam support portion 242, and meanwhile, the two ends of the second reinforcing plate 30e and the first reinforcing plate 30d are respectively abutted against the first cross beam support portion 241. After the overlapping, the first connecting plate 30a of the roof rear cross beam 30 is connected with the first connecting portion 24a of the first cross beam support portion 241 by the hot-melt self-tapping screw, the second connecting plate 30b of the roof rear cross beam 30 is connected with the second connecting portion 24b of the first cross beam support portion 241 by the lock rivet, and the second reinforcing plate 30e of the roof rear cross beam 30 is connected with the fourth connecting portion 24d of the second cross beam support portion 242 by the hot-melt self-tapping screw. After the assembly, the closed force transmission cavity is formed inside the roof rear cross beam 30.

[0036] Please continue to refer to Figure 5 The outer surface of the rear side wall inner panel casting 20 is provided with a plurality of first outer reinforcing ribs 20a extending downward and forward from the D-pillar joint 24 to the rear shock absorber area, and a plurality of second outer reinforcing ribs 20b extending in the front-rear direction of the automobile, the second outer reinforcing ribs 20b are arranged from the top end of the rear side wall inner panel casting 20 to the bottom end of the rear side wall inner panel casting 20, and the second outer reinforcing ribs 20b and the first outer reinforcing ribs 20a intersect with each other to form a grid structure. The first outer reinforcing ribs 20a are parallel to each other and arranged from front to back along the length direction of the automobile, the top of the first outer reinforcing rib 20a is connected with the corresponding part of the first cross beam support portion 241, and the bottom of the first outer reinforcing rib 20a extends to the rear shock absorber area, so that a continuous force transmission path from top to bottom is formed on the rear side wall inner panel casting 20.

[0037] Further, the rear side wall inner plate cast 20 is provided with a plurality of third outer reinforcing ribs 20c extending along the front-rear direction of the automobile in front of the quarter window 25, and a fourth outer reinforcing rib 20d extending along the height direction of the automobile and perpendicular to the outer surface of the rear side wall inner plate cast 20 below the quarter window 25, the third outer reinforcing ribs 20c being arranged from the top end of the rear side wall inner plate cast 20 to the bottom end of the rear side wall inner plate cast 20, and the third outer reinforcing rib 20c at the bottom of the rear side wall inner plate cast 20 intersecting with the fourth outer reinforcing rib 20d. In the embodiment of the present application, the first outer reinforcing rib 20a, the second outer reinforcing rib 20b, the third outer reinforcing rib 20c and the fourth outer reinforcing rib 20d at the lower half of the rear side wall inner plate cast 20 have similar functions as the C-pillar reinforcing plate in the prior art. The first outer reinforcing rib 20a, the second outer reinforcing rib 20b and the D-pillar joint 24 at the upper half of the rear side wall inner plate cast 20 have similar functions as the D-pillar 23 reinforcing plate in the prior art.

[0038] Please refer to Figure 4 , the D-pillar 23 is generally triangular in shape and located behind the first outer reinforcing rib 20a, and includes a D-pillar side plate 231 extending from the rear edge of the D-pillar 23 in a direction perpendicular to the outer surface of the rear side wall inner plate cast 20, that is, the D-pillar side plate 231 forms an included angle with the outer surface of the rear side wall inner plate cast 20. A plurality of inner reinforcing ribs 20e are arranged between the inner surface of the rear side wall inner plate cast 20, the D-pillar side plate 231 and the outer plate of the rear side wall inner plate cast 20, the inner reinforcing ribs 20e being parallel to each other and arranged from top to bottom along the contour line of the D-pillar side plate 231 to enhance the strength of the D-pillar 23.

[0039] In summary, the present application has at least one of the following beneficial effects:

[0040] 1. The rear body frame assembly of the present application is designed by using aluminum alloy extrusion and casting process, integrating multiple parts in the prior art into two parts, and has high structural integration;

[0041] 2. Compared with the prior art, the present application reduces the number of welded parts, thereby shortening the welding dimension chain, helping to improve the connection accuracy, and helping to reduce the number of molds and clamps and the manufacturing cost;

[0042] 3. The cast part has prominent weight reduction effect compared with the steel stamping part, has high material utilization rate, and does not need multiple welding due to complete structure, so that the rigidity and strength of the rear body frame assembly of the present application are greatly improved;

[0043] 4. The roof rear cross beam and the D-pillar joint overlap to form a closed force transmission cavity, the first outer reinforcing rib and the second outer reinforcing rib extend from the top end of the rear side wall inner plate cast to the bottom end of the rear side wall inner plate cast to form a coherent force transmission path from top to bottom, so that the stress of the overall structure is more uniform and the force transmission is more reasonable.

[0044] In this document, the terms "comprise" "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0045] The above description is only specific embodiments of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered by the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A vehicle body rear frame assembly characterized by, The application relates to a rear side wall inner plate casting (20) and a roof rear cross beam (30) connected with the rear side wall inner plate casting (20), the rear side wall inner plate casting (20) comprising a rear side wall inner plate (21) and a D-pillar joint (24) integrally cast, the roof rear cross beam (30) being connected with the rear side wall inner plate casting (20) through the D-pillar joint (24), the D-pillar joint (24) comprising a first cross beam support part (241) and a second cross beam support part (242) protruding from the first cross beam support part (241) in the transverse direction of the automobile, the first cross beam support part (241) comprising a first connecting part (24a), a second connecting part (24b) below the first connecting part (24a), and a third connecting part (24c) connected with the rear end of the first connecting part (24a) and the front end of the second connecting part (24b), the roof rear cross beam (30) comprising a first connecting plate (30a), a second connecting plate (30b), and a third connecting plate (30c) connected with the rear end of the first connecting plate (30a) and the front end of the second connecting plate (30b), the first connecting plate (30a), the second connecting plate (30b) and the third connecting plate (30c) of the roof rear cross beam (30) being respectively overlapped on the first connecting part (24a), the second connecting part (24b) and the third connecting part (24c) of the first cross beam support part (241), the roof rear cross beam (30) comprising a first reinforcing plate (30d) extending downward from the lower surface of the first connecting plate (30a), and a second reinforcing plate (30e) extending rearward from the end of the first reinforcing plate (30d), the first connecting plate (30a) and the third connecting plate (30c) protruding from the first reinforcing plate (30d) and the second reinforcing plate (30e) in the width direction of the automobile, the second reinforcing plate (30e) and the first reinforcing plate (30d) being overlapped on the second cross beam support part (242).

2. The body rear frame assembly of claim 1, wherein, The rear side wall inner plate casting (20) is an aluminum alloy casting, and the roof rear cross beam (30) is an aluminum alloy extrusion part.

3. The body rear frame assembly of claim 1, wherein, The rear side wall inner plate casting (20) further comprises a rear side wall inner plate reinforcing plate (22) and a quarter window (25), the quarter window (25) being arranged on the rear side wall inner plate (21), the rear side wall inner plate reinforcing plate (22) being connected with the upper part of the rear side wall inner plate (21), and the D-pillar joint (24) being connected with the rear part of the rear side wall inner plate reinforcing plate (22) and the upper part of the rear side wall inner plate (21).

4. The body rear frame assembly of claim 1, wherein, The second cross beam support part (242) has a portion parallel to the second connecting part (24b), and the portion of the second cross beam support part (242) parallel to the second connecting part (24b) is sunken compared with the second connecting part (24b) of the first cross beam support part (241), and the first cross beam support part (241) and the second cross beam support part (242) are connected with the rear roof cross beam (30) through hot melt self-tapping screws and lock rivets.

5. The body rear frame assembly of claim 1, wherein, The second cross beam support part (242) includes a fourth connecting part (24d) protruding out of the second connecting part (24b) in the automobile width direction and a fifth connecting part (24e) extending upward from the front end of the fourth connecting part (24d), and the fourth connecting part (24d) is sunken compared with the second connecting part (24b) of the first cross beam support part (241), and the second reinforcing plate (30e) and the first reinforcing plate (30d) are respectively overlapped on the fourth connecting part (24d) and the fifth connecting part (24e) of the second cross beam support part (242), and the two ends of the second reinforcing plate (30e) and the first reinforcing plate (30d) are respectively abutted against the first cross beam support part (241).

6. The body rear frame assembly of claim 5, wherein, The first connecting plate (30a) of the rear roof cross beam (30) is connected with the first connecting part (24a) of the first cross beam support part (241) through hot melt self-tapping screws, the second connecting plate (30b) of the rear roof cross beam (30) is connected with the second connecting part (24b) of the first cross beam support part (241) through lock rivets, and the second reinforcing plate (30e) of the rear roof cross beam (30) is connected with the fourth connecting part (24d) of the second cross beam support part (242) through hot melt self-tapping screws.

7. The body rear frame assembly of claim 5, wherein, A cavity is formed between the first reinforcing plate (30d), the second reinforcing plate (30e), the first connecting plate (30a) and the third connecting plate (30c), and the rear roof cross beam (30) further includes a third reinforcing plate (30f) arranged in the cavity and parallel to the second reinforcing plate (30e) and the first connecting plate (30a).

8. The body rear frame assembly of claim 1, wherein, A first outer reinforcing rib (20a) extending downward and forward from the D-pillar joint (24) to the rear shock absorber area and a plurality of second outer reinforcing ribs (20b) extending in the automobile front-rear direction are arranged on the outer surface of the rear side wall inner panel casting (20), the second outer reinforcing ribs (20b) are arranged from the top end of the rear side wall inner panel casting (20) to the bottom end of the rear side wall inner panel casting (20), and the second outer reinforcing ribs (20b) and the first outer reinforcing rib (20a) intersect with each other.

9. The body rear frame assembly of claim 3, wherein, A plurality of third outer reinforcing ribs (20c) extending in the automobile front-rear direction are arranged in front of the quarter window (25) of the rear side wall inner panel casting (20), and the plurality of third outer reinforcing ribs (20c) are arranged from the top end of the rear side wall inner panel casting (20) to the bottom end of the rear side wall inner panel casting (20).

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