A rear frame structure for automobiles and automobiles

Abstract

This invention provides a rear frame structure for an automobile and an automobile, relating to the field of automotive component technology. It includes multiple reinforcing ring structures, comprising interconnected upper and lower C-rings. A roof frame assembly includes a rear roof crossbeam, a rear side frame assembly includes an inner C-pillar panel, and an upper crossbeam assembly includes a front luggage compartment reinforcing plate and a side luggage compartment reinforcing plate. The rear roof crossbeam and the front luggage compartment reinforcing plate are arranged opposite each other, with their ends connected by the inner C-pillar panel. A rear floor frame assembly includes a rear cast aluminum wheel arch and a rear cast aluminum body. The two ends of the front luggage compartment reinforcing plate are respectively connected to the rear cast aluminum wheel arches on both sides of the rear cast aluminum body through corresponding side luggage compartment reinforcing plates. The front luggage compartment reinforcing plate, the rear roof crossbeam, and the inner C-pillar panel enclose an upper C-ring; the rear cast aluminum wheel arch, the rear cast aluminum body, the front luggage compartment reinforcing plate, and the side luggage compartment reinforcing plates enclose a lower C-ring. The front luggage compartment reinforcing plate divides the C-ring into two parts, resulting in higher overall rigidity of the C-ring.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and more specifically, to a rear frame structure for an automobile and an automobile. Background Technology

[0002] With the development of automotive technology, people have increasingly higher demands for the comfort of car rides. During driving, road excitation is transmitted through the tires to the car's sheet metal, causing localized vibrations and resulting in corresponding noise inside the vehicle. The rear frame, especially the rear C-ring structure, is one of the main causes of this noise. Strengthening the rigidity of the rear C-ring structure is key to solving the problem of in-vehicle noise. Current rear C-ring structures are generally quadrilateral structures formed by a top crossbeam, a bottom crossbeam, and side panels, which have relatively poor stability, meaning the overall rigidity of the car body still needs improvement. Summary of the Invention

[0003] The present invention aims to solve the technical problem of insufficient rigidity and strength of existing automotive rear frame.

[0004] On one hand, this invention proposes a rear frame structure for automobiles, including multiple reinforcing ring structures formed by a roof frame assembly, an upper crossbeam assembly, a rear side frame assembly, and a rear floor frame assembly. Each reinforcing ring structure includes interconnected upper and lower C-rings. The roof frame assembly includes a roof rear crossbeam, and the rear side frame assembly includes a C-pillar inner panel. Both ends of the roof rear crossbeam are connected to the top of the C-pillar inner panel. The upper crossbeam assembly includes a front luggage compartment reinforcing plate and side luggage compartment reinforcing plates. The two ends of the front luggage compartment reinforcing plate are... The rear floor frame assembly includes a rear cast aluminum wheel arch and a rear cast aluminum body, with the two ends of the front reinforcing plate of the luggage compartment connected to the rear cast aluminum wheel arch via corresponding side reinforcing plates of the luggage compartment. The rear cast aluminum body has a groove-shaped structure and is located between the rear cast aluminum wheel arches on both sides. The front reinforcing plate of the luggage compartment, the rear crossbeam of the roof, and the inner plate of the C-pillar form the upper C-ring. The rear cast aluminum wheel arch, the rear cast aluminum body, the front reinforcing plate of the luggage compartment, and the side reinforcing plates of the luggage compartment form the lower C-ring.

[0005] The rear frame structure of automobiles described in this invention has at least the following advantages compared to the prior art:

[0006] The roof frame assembly and the rear floor frame assembly are separated into upper and lower parts by an upper crossbeam assembly. The roof rear crossbeam of the roof frame assembly and the luggage compartment front reinforcement plate of the upper crossbeam assembly are positioned opposite each other, and their ends are connected by the C-pillar inner panels of the corresponding rear side frame assemblies. The roof rear crossbeam, luggage compartment front reinforcement plate, and C-pillar inner panels together form the upper C-ring. Simultaneously, the luggage compartment front reinforcement plate and the channel-shaped rear cast aluminum body are positioned vertically. The two ends of the luggage compartment front reinforcement plate are connected to the rear cast aluminum wheel arches on both sides of the rear cast aluminum body through luggage compartment side reinforcement plates. The luggage compartment front reinforcement plate, luggage compartment side reinforcement plates, rear cast aluminum body, and rear cast aluminum wheel arches together form the lower C-ring. By using the luggage compartment front reinforcement plate to divide the individual C-ring into upper and lower parts, the overall C-ring is strengthened, which helps improve the rigidity and strength of the rear frame of the vehicle body and avoids interior noise problems.

[0007] Optionally, the front reinforcing plate of the luggage compartment is provided with a first reinforcing rib extending in the left-right direction of the vehicle, and the side reinforcing plate of the luggage compartment is provided with a second reinforcing rib corresponding to the first reinforcing rib, and the first reinforcing rib and the second reinforcing rib are connected.

[0008] Optionally, the upper crossbeam assembly further includes a first connecting plate, a seat belt retractor mounting plate, and a support plate. The two ends of the luggage compartment front reinforcing plate are respectively connected to the inner C-pillar panel through the corresponding first connecting plate. The first connecting plate extends along the front-rear direction of the vehicle. The seat belt retractor mounting plate and the support plate are both disposed on the first connecting plate. The first connecting plate is connected to the inner C-pillar panel through the seat belt retractor mounting plate and the support plate.

[0009] Optionally, the plurality of reinforcing ring structures further include a rear windshield reinforcing ring, the roof frame assembly further includes a C-pillar upper side beam reinforcing plate, two C-pillar upper side beam reinforcing plates are respectively disposed on the left and right sides of the vehicle, the roof rear crossbeam is connected between the two C-pillar upper side beam reinforcing plates, the upper crossbeam assembly further includes a luggage compartment rear reinforcing plate, the rear side frame assembly further includes a side panel, the luggage compartment rear reinforcing plate is located on the rear side of the roof rear crossbeam, and the luggage compartment rear reinforcing plate is connected between the C-pillar inner panels on both sides, the side panel is disposed on the outer side of the C-pillar inner panel, the roof rear crossbeam, the luggage compartment rear reinforcing plate, the two C-pillar inner panels, the two C-pillar upper side beam reinforcing plates and the two side panel outer panels together form the rear windshield reinforcing ring.

[0010] Optionally, the plurality of reinforcing ring structures further include a connecting ring, and the rear side frame assembly further includes an upper C-pillar reinforcing plate, a lower C-pillar reinforcing plate, a middle C-pillar reinforcing plate, and an outer rear wheel arch panel. The upper C-pillar reinforcing plate, the lower C-pillar reinforcing plate, and the middle C-pillar reinforcing plate are disposed at the end of the inner C-pillar panel facing forward of the vehicle. The end of the upper C-pillar reinforcing plate facing upward of the vehicle is connected to the middle C-pillar reinforcing plate. The end of the upper C-pillar reinforcing plate facing downward of the vehicle is connected to the lower C-pillar reinforcing plate and the outer rear wheel arch panel. The end of the middle C-pillar reinforcing plate facing upward of the vehicle is connected to the upper C-pillar side beam reinforcing plate. The end of the middle C-pillar reinforcing plate facing downward of the vehicle is connected to the outer rear wheel arch panel. The upper C-pillar reinforcing plate, the lower C-pillar reinforcing plate, the middle C-pillar reinforcing plate, and the outer rear wheel arch panel together form the connecting ring.

[0011] Optionally, the plurality of reinforcing ring structures further include a small side window reinforcing ring, which is formed by the C-pillar upper side beam reinforcing plate, the C-pillar middle reinforcing plate, the C-pillar upper reinforcing plate, the C-pillar inner plate, and the side outer plate.

[0012] Optionally, the plurality of reinforcing ring structures further include a rear windshield lower edge reinforcing ring, the rear side frame assembly further includes an upper reinforcing plate on the inner C-pillar panel, the upper reinforcing plate on the inner C-pillar panel is located at the end of the inner C-pillar panel facing the rear of the vehicle, and the upper reinforcing plate on the inner C-pillar panel is connected to the rear cast aluminum wheel arches, the rear floor frame assembly further includes a lower reinforcing crossbeam, the lower reinforcing crossbeam is located between the two rear cast aluminum wheel arches, and the two ends of the lower reinforcing crossbeam are respectively connected to the two rear cast aluminum wheel arches, the luggage compartment rear reinforcing plate, the upper reinforcing plate on the inner C-pillar panel, the rear cast aluminum wheel arches and the lower reinforcing crossbeam together form the rear windshield lower edge reinforcing ring.

[0013] Optionally, the plurality of reinforcing ring structures further include a side reinforcement ring, wherein the upper reinforcing plate of the inner C-pillar, the middle reinforcing plate of the C-pillar, the outer rear wheel arch plate, and the inner C-pillar form the side reinforcement ring.

[0014] Optionally, the plurality of reinforcing ring structures further include a D-ring, the rear side frame assembly further includes a rear drainage channel structure and a taillight mounting plate, the rear floor frame assembly further includes a rear panel, the two ends of the luggage compartment rear reinforcing plate are respectively connected to the corresponding rear drainage channel structure, the rear drainage channel structures on both sides are respectively connected to the two ends of the rear panel through the corresponding taillight mounting plates, and the luggage compartment rear reinforcing plate, the rear drainage channel structure, the taillight mounting plate and the rear panel enclose to form the D-ring.

[0015] On the other hand, the present invention proposes an automobile including the aforementioned rear frame structure. The advantages of this automobile compared to the prior art are the same as those of the aforementioned rear frame structure, and will not be repeated here. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the rear frame structure of a car according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the rear frame structure of a car after removing the side panels and roof, according to an embodiment of the present invention.

[0018] Figure 3 for Figure 2 A schematic diagram of the decomposed structure;

[0019] Figure 4 for Figure 2 Another structural diagram from a different perspective;

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is a schematic diagram of the connection structure between the front reinforcing plate and the side reinforcing plate of the luggage compartment according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Roof frame assembly; 11. Rear roof crossbeam; 12. C-pillar upper side beam reinforcement plate; 13. Second connecting plate; 2. Upper crossbeam assembly; 21. Luggage compartment rear reinforcement plate; 22. Luggage compartment front reinforcement plate; 221. First reinforcing rib; 23. Luggage compartment side reinforcement plate; 231. Second reinforcing rib; 24. Luggage compartment panel; 25. First connecting plate; 251. Luggage compartment upright plate; 252. Luggage compartment upright plate connecting plate; 253. Rear connecting plate of upper crossbeam; 26. Seatbelt retractor 27. Mounting plate; 3. Support plate; 4. Rear side frame assembly; 5. C-pillar inner panel; 6. Side panel outer panel; 7. C-pillar upper reinforcing plate; 8. C-pillar lower reinforcing plate; 9. C-pillar middle reinforcing plate; 10. Rear wheel arch outer panel; 11. C-pillar inner panel upper reinforcing plate; 22. Rear water channel structure; 33. Taillight mounting plate; 44. Rear floor frame assembly; 5. Rear cast aluminum wheel arch; 6. Rear cast aluminum floor; 7. Rear cast aluminum body; 8. Lower reinforcing crossbeam; 9. Rear panel. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fitting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In addition, it should be noted that in the description of the present invention, terms such as "upper," "lower," "front," and "rear" used to indicate orientation in various embodiments are only for simplifying the description of the positional relationships based on the accompanying drawings and do not mean that the elements and devices referred to must be operated in accordance with the specific orientation and limited operation, method, and structure in the specification. Such directional terms do not constitute a limitation on the present invention.

[0027] This paper establishes a coordinate system XYZ, where the X-axis represents the front-to-back direction of the car, with the positive direction of the X-axis representing the front of the car and the negative direction of the X-axis representing the rear of the car; the Y-axis represents the left-to-right direction of the car, with the positive direction of the Y-axis representing the left of the car and the negative direction of the Y-axis representing the right of the car; and the Z-axis represents the up-and-down direction of the car, with the positive direction of the Z-axis representing the top of the car and the negative direction of the Z-axis representing the bottom of the car.

[0028] like Figure 1 , 2 As shown in Figure 4, this embodiment of the invention provides a rear frame structure for an automobile, comprising multiple reinforcing ring structures formed by a roof frame assembly 1, an upper crossbeam assembly 2, a rear side frame assembly 3, and a rear floor frame assembly 4. Each reinforcing ring structure includes an upper C-ring and a lower C-ring connected to each other. The roof frame assembly 1 includes a roof rear crossbeam 11, and the rear side frame assembly 3 includes a C-pillar inner panel 31. Both ends of the roof rear crossbeam 11 are connected to the top of the C-pillar inner panel 31. The upper crossbeam assembly 2 includes a front luggage compartment reinforcing plate 22 and a side luggage compartment reinforcing plate 23. Both ends of the front luggage compartment reinforcing plate 22 are connected to the top of the rear floor frame assembly 4. The C-pillar inner panel 31 is connected in the middle. The rear floor frame assembly 4 includes a rear cast aluminum wheel arch 41 and a rear cast aluminum body 43. The two ends of the luggage compartment front reinforcing plate 22 are respectively connected to the rear cast aluminum wheel arch 41 through the corresponding luggage compartment side reinforcing plates 23. The rear cast aluminum body 43 has a groove-shaped structure and is located between the rear cast aluminum wheel arches 41 on both sides. The luggage compartment front reinforcing plate 22, the roof rear crossbeam 11 and the C-pillar inner panel 31 form the upper C-ring. The rear cast aluminum wheel arch 41, the rear cast aluminum body 43, the luggage compartment front reinforcing plate 22 and the luggage compartment side reinforcing plate 23 form the lower C-ring.

[0029] Specifically, there are two rear side frame assemblies 3, located on the left and right sides of the vehicle, respectively, forming the left and right sides of the vehicle body. The upper ends of the two rear side frame assemblies 3 are connected to the roof frame assembly 1, and the lower ends are connected to the rear floor frame assembly 4. The upper crossbeam assembly 2 is located between the roof frame assembly 1 and the rear floor frame assembly 4, and its left and right ends are connected to the two rear side frame assemblies 3. The roof frame assembly 1 is inclined from the upper front of the vehicle to the lower rear, and a roof is installed on it to form the vehicle roof. The rear floor frame assembly 4 forms the rear floor of the vehicle. The upper crossbeam assembly 2 is generally horizontal, and its lower portion, together with the rear side frame assemblies 3 and the rear floor frame assembly 4, forms the vehicle's luggage compartment space.

[0030] Here, the top cover frame assembly 1 may also include a luggage compartment panel 24, which may be a horizontally arranged plate structure that can be used to place items. The luggage compartment front reinforcing plate 22 is located at the front end of the luggage compartment panel 24 and extends along the Y-axis. The luggage compartment side reinforcing plate 23 may be an arc-shaped structure and there are two of them. The two ends of the luggage compartment front reinforcing plate 22 are respectively connected to the rear cast aluminum wheel arches 41 through the corresponding luggage compartment side reinforcing plates 23. The rear floor frame assembly 4 also includes a rear cast aluminum floor 42. The rear cast aluminum body 43 and the rear cast aluminum wheel arches 41 are disposed on the rear cast aluminum floor 42. The two rear cast aluminum wheel arches 41 are respectively connected to the two side walls of the groove-shaped (or U-shaped with the opening facing upward) rear cast aluminum body 43.

[0031] In this embodiment, the top cover frame assembly 1 and the rear floor frame assembly 4 are separated into upper and lower parts by the upper crossbeam assembly 2. The top cover rear crossbeam 11 of the top cover frame assembly 1 and the luggage compartment front reinforcing plate 22 of the upper crossbeam assembly 2 are arranged opposite each other, and their two ends are connected by the C-pillar inner plate 31 of the corresponding rear side frame assembly 3. The top cover rear crossbeam 11, luggage compartment front reinforcing plate 22 and C-pillar inner plate 31 form an upper C-ring. At the same time, the luggage compartment front reinforcing plate 22 and the grooved rear cast aluminum body 43 are arranged vertically. The two ends of the luggage compartment front reinforcing plate 22 are connected to the rear cast aluminum wheel arches 41 on both sides of the rear cast aluminum body 43 by luggage compartment side reinforcing plates 23. The luggage compartment front reinforcing plate 22, luggage compartment side reinforcing plates 23, rear cast aluminum body 43 and rear cast aluminum wheel arches 41 form a lower C-ring. The upper C-ring is inclined from the upper front of the car to the lower rear of the car, and the lower C-ring is inclined from the upper rear of the car to the lower front of the car. The lower end of the upper C-ring and the upper end of the lower C-ring are connected to the rear reinforcing plate 21 of the luggage compartment. The front reinforcing plate 22 of the luggage compartment divides the individual C-ring into upper and lower parts, namely the upper C-ring and the lower C-ring, and strengthens the C-ring as a whole, which helps to improve the rigidity and strength of the rear frame of the vehicle body and avoid the problem of noise inside the vehicle.

[0032] like Figure 6 As shown, optionally, the front reinforcing plate 22 of the luggage compartment is provided with a first reinforcing rib 221 extending in the left-right direction of the vehicle, and the side reinforcing plate 23 of the luggage compartment is provided with a second reinforcing rib 231 corresponding to the first reinforcing rib 221, and the first reinforcing rib 221 and the second reinforcing rib 231 are connected.

[0033] In this embodiment, the first reinforcing rib 221 extends along the direction shown by the Y-axis. The first reinforcing rib 221 can be a strip-shaped reinforcing rib formed by the downward indentation of the front reinforcing plate 22 of the luggage compartment. The second reinforcing rib 231 is consistent with the bending arc direction of the side reinforcing plate 23 of the luggage compartment. The second reinforcing rib 231 can be formed by the inward indentation of the side reinforcing plate 23 of the luggage compartment. The first reinforcing rib 221 and the second reinforcing ribs 231 on both sides are interconnected, further enhancing the bending and torsional resistance of the upper crossbeam assembly 2.

[0034] like Figure 5 As shown, optionally, the upper crossbeam assembly 2 further includes a first connecting plate 25, a seat belt retractor mounting plate 26, and a support plate 27. The two ends of the luggage compartment front reinforcing plate 22 are respectively connected to the C-pillar inner panel 31 through the corresponding first connecting plate 25. The first connecting plate 25 extends along the front-rear direction of the vehicle. The seat belt retractor mounting plate 26 and the support plate 27 are both disposed on the first connecting plate 25. The first connecting plate 25 is connected to the C-pillar inner panel 31 through the seat belt retractor mounting plate 26 and the support plate 27.

[0035] Specifically, such as Figure 5 As shown, the first connecting plate 25 includes a luggage compartment upright plate 251, a luggage compartment upright plate connecting plate 252, a rear floor crossbeam, and an upper crossbeam rear connecting plate 253. The luggage compartment upright plate 251 has two vertically opposite upright plates, which are welded together by the vertically arranged luggage compartment upright plate connecting plate 252. The luggage compartment front reinforcing plate 22 is connected to the C-pillar inner plate 31 through the luggage compartment upright plate 251. The luggage compartment upright plate connecting plate 252 is connected to the upper luggage compartment upright plate 251 and the luggage compartment rear reinforcing plate 21 through the upper crossbeam rear connecting plate 253. The lower luggage compartment upright plate 251 is flanged and screwed to the rear cast aluminum wheel arch 41. The luggage compartment upright plate connecting plate 252 is screwed to the rear cast aluminum wheel arch 41 and the rear cast aluminum body 43.

[0036] In this embodiment, the upper crossbeam rear connecting plate 253 is provided with a seat belt retractor mounting plate 26 and a support plate 27. The seat belt retractor mounting plate 26 includes a seat belt retractor mounting support plate and a seat belt retractor bracket support plate that are connected to each other. The seat belt retractor mounting support plate is connected to the upper crossbeam rear connecting plate 253, and the seat belt retractor bracket support plate is connected to the C-pillar inner plate 31. The support plate 27 can be a U-shaped structure with the opening facing the inside of the car. The two ends of the U-shape are connected to the C-pillar inner plate 31 and the upper crossbeam rear connecting plate 253, respectively. The upper crossbeam rear connecting plate 253 is connected to the C-pillar inner plate 31 through the seat belt retractor mounting plate 26 and the support plate 27, so as to realize the secondary overlap between the C-pillar inner plate 31 and the upper crossbeam assembly 2, increase the overlap area, ensure the rigidity and strength performance of the upper C-ring, and the connection stability between the upper C-ring and the rear windshield reinforcing ring mentioned later.

[0037] like Figure 2-3 As shown, optionally, the plurality of reinforcing ring structures also include a rear windshield reinforcing ring, the roof frame assembly 1 also includes a C-pillar upper side beam reinforcing plate 12, the two C-pillar upper side beam reinforcing plates 12 are respectively provided on the left and right sides of the vehicle, the roof rear crossbeam 11 is connected between the two C-pillar upper side beam reinforcing plates 12, the upper crossbeam assembly 2 also includes a luggage compartment rear reinforcing plate 21, the rear side frame assembly 3 also includes a side panel 32, the luggage compartment rear reinforcing plate 21 is located on the rear side of the roof rear crossbeam 11, and the luggage compartment rear reinforcing plate 21 is connected between the C-pillar inner panels 31 on both sides, the side panel 32 is provided on the outer side of the C-pillar inner panel 31, the roof rear crossbeam 11, the luggage compartment rear reinforcing plate 21, the two C-pillar inner panels 31, the two C-pillar upper side beam reinforcing plates 12 and the two side panel 32 enclose to form the rear windshield reinforcing ring.

[0038] Specifically, the roof frame assembly 1 further includes a second connecting plate 13. The interior of the roof rear crossbeam 11 is provided with a roof rear crossbeam reinforcing plate. Both ends of the roof rear crossbeam reinforcing plate are connected to the C-pillar inner panel 31 via corresponding second connecting plates 13. The roof rear crossbeam 11 is arranged along the Y-axis. Two C-pillar upper side beam reinforcing plates 12 are provided, located on the left and right sides of the vehicle, respectively. The left C-pillar upper side beam reinforcing plate 12 is connected to the top of the left C-pillar inner panel 31, and the right C-pillar upper side beam reinforcing plate 12 is connected to the top of the right C-pillar inner panel 31. The roof rear crossbeam 11 spans between the left and right C-pillar upper side beam reinforcing plates 12, and its two ends are respectively connected to the middle of the C-pillar upper side beam reinforcing plates 12. The rear side frame assembly 3 is connected to the rear side frame, with the outer side panel 32 located on the outermost side and connected to the inner C-pillar panel 31. The rear reinforcing plate 21 of the luggage compartment is located below the rear crossbeam 11 of the roof. The rear reinforcing plate 21 of the luggage compartment and the rear crossbeam 11 of the roof are positioned opposite each other. The rear reinforcing plate 21 of the luggage compartment, the rear crossbeam 11 of the roof, the upper C-pillar reinforcing plates 12 on both sides, the inner C-pillar panels 31 on both sides, and the outer side panels 32 on both sides form a roughly square reinforcing ring. The connection between the rear reinforcing plate 21 of the luggage compartment, the rear crossbeam 11 of the roof, the upper C-pillar reinforcing plates 12 on both sides, the inner C-pillar panels 31 on both sides, and the outer side panels 32 on both sides can be welded.

[0039] In this embodiment, by forming a closed rear windshield reinforcing ring, the rigidity of the rear windshield mounting surface can be enhanced. The rear windshield reinforcing ring and the upper C-ring are connected to the rear crossbeam 11 of the top cover. That is, the rear crossbeam 11 of the top cover is a component of both the rear windshield reinforcing ring and the upper C-ring. The following descriptions all have similar meanings.

[0040] like Figure 2-4 As shown, optionally, the plurality of reinforcing ring structures further include connecting rings. The rear side frame assembly 3 also includes an upper C-pillar reinforcing plate 33, a lower C-pillar reinforcing plate 34, a middle C-pillar reinforcing plate 35, and a rear wheel arch outer plate 36. The upper C-pillar reinforcing plate 33, the lower C-pillar reinforcing plate 34, and the middle C-pillar reinforcing plate 35 are located at the end of the inner C-pillar plate 31 facing the front of the vehicle. The upper C-pillar reinforcing plate 33 is connected to the middle C-pillar reinforcing plate 35 at the top of the vehicle. The lower C-pillar reinforcing plate 33 is connected to the lower C-pillar reinforcing plate 34 and the rear wheel arch outer plate 36. The upper C-pillar reinforcing plate 35 is connected to the upper C-pillar side beam reinforcing plate 12 at the top of the vehicle. The lower C-pillar reinforcing plate 35 is connected to the rear wheel arch outer plate 36. The upper C-pillar reinforcing plate 33, the lower C-pillar reinforcing plate 34, the middle C-pillar reinforcing plate 35, and the rear wheel arch outer plate 36 together form the connecting ring.

[0041] In this embodiment, the upper C-pillar reinforcing plate 33, lower C-pillar reinforcing plate 34, middle C-pillar reinforcing plate 35, and rear wheel arch outer plate 36 of the connecting ring are connected to the inner C-pillar plate 31. The upper and lower C-rings are also connected to the inner C-pillar plate 31, overlapping each other to improve the connection stability of the C-rings. Two connecting rings are provided, located on the left and right sides of the lower C-ring respectively. The left and right sides of the lower C-ring are connected to the side wall reinforcing ring (described later) via corresponding connecting rings. The lower C-ring is also connected to the small side window reinforcing ring (described later), improving the overall rigidity of the C-ring.

[0042] like Figure 2-4 As shown, optionally, the plurality of reinforcing ring structures also include a rear windshield lower edge reinforcing ring, the rear side frame assembly 3 also includes an upper reinforcing plate 37 on the inner C-pillar, the upper reinforcing plate 37 on the inner C-pillar 31 facing the rear of the vehicle, and the upper reinforcing plate 37 on the inner C-pillar 31 is connected to the rear cast aluminum wheel arch 41, the rear floor frame assembly 4 also includes a lower reinforcing crossbeam 44, the lower reinforcing crossbeam 44 is located between the two rear cast aluminum wheel arches 41, and the two ends of the lower reinforcing crossbeam 44 are respectively connected to the two rear cast aluminum wheel arches 41, the luggage compartment rear reinforcing plate 21, the upper reinforcing plate 37 on the inner C-pillar 31, the rear cast aluminum wheel arches 41 and the lower reinforcing crossbeam 44 together form the rear windshield lower edge reinforcing ring.

[0043] In this embodiment, the lower reinforcing beam 44 is located at the front of the rear floor frame assembly 4. The front ends of the two rear cast aluminum wheel arches 41 are connected by the lower reinforcing beam 44, and the rear ends of the two rear cast aluminum wheel arches 41 are connected by the rear cast aluminum body 43. The lower edge reinforcing ring of the rear windshield is connected to the rear reinforcing plate 21 of the luggage compartment. The lower edge reinforcing ring of the rear windshield, the rear windshield reinforcing ring, and the upper C-ring form a door-like connection, which reinforces the cavities of the three components.

[0044] like Figure 1-4 As shown, optionally, the plurality of reinforcing ring structures also include a small side window reinforcing ring, which is formed by the C-pillar upper beam reinforcing plate 12, the C-pillar middle reinforcing plate 35, the C-pillar upper reinforcing plate 33, the C-pillar inner plate 31 and the side outer plate 32.

[0045] The multiple reinforcing ring structures also include a rear windshield lower edge reinforcing ring, and the upper reinforcing plate 37 of the inner C-pillar, the middle reinforcing plate 35 of the C-pillar, the outer rear wheel arch plate 36 and the inner C-pillar plate 31 together form the side wall reinforcing ring.

[0046] In this embodiment, the small side window reinforcing ring and the connecting ring overlap on two sides, namely the middle reinforcing plate 35 and the upper reinforcing plate 33 of the C-pillar. The small side window reinforcing ring overlaps with the upper C-ring on the inner plate 31 of the C-pillar. Both the small side window reinforcing ring and the lower C-ring are connected to the inner plate 31 of the C-pillar. The small side window reinforcing ring is interconnected with the upper C-ring, the lower C-ring, and the connecting ring, strengthening the structural continuity of this area and ensuring sufficient rigidity. Here, the upper edge of the small side window reinforcing ring is approximately flush with the upper edge of the upper C-ring, and the lower edge of the small side window reinforcing ring is approximately flush with the lower edge of the upper C-ring, ensuring uniform force transmission and diffusion.

[0047] The side reinforcement ring and the upper C-ring are connected to the inner plate 31 of the C-pillar. The lower C-ring is connected to the side reinforcement ring through the connecting ring. The side reinforcement ring and the small side window reinforcement ring are connected to the middle reinforcement plate 35 and the inner plate 31 of the C-pillar. The side reinforcement ring and the rear windshield reinforcement ring are connected to the inner plate 31 of the C-pillar. The side reinforcement ring and the lower edge reinforcement ring of the rear windshield are connected to the upper reinforcement plate 37 of the inner plate of the C-pillar. The upper C-ring, the small side window reinforcement ring, the rear windshield reinforcement ring and the lower edge reinforcement ring of the rear windshield are connected through the side reinforcement ring to increase the rigidity of the interlocking rings.

[0048] like Figure 2-3 As shown, optionally, the plurality of reinforcing ring structures also include a D-ring, the rear side frame assembly 3 also includes a rear drainage channel structure 38 and a taillight mounting plate 39, the rear floor frame assembly 4 also includes a rear panel 45, the rear panel 45 is mounted on the rear cast aluminum floor 42, the two ends of the luggage compartment rear reinforcing plate 21 are respectively connected to the corresponding rear drainage channel structure 38, the two sides of the rear drainage channel structure 38 are respectively connected to the two ends of the rear panel 45 through the corresponding taillight mounting plate 39, the luggage compartment rear reinforcing plate 21, the rear drainage channel structure 38, the taillight mounting plate 39 and the rear panel 45 together form the D-ring.

[0049] In this embodiment, the taillight mounting plate 39 includes an upper taillight mounting plate and a lower taillight mounting plate that are installed together. The rear bulkhead 45 includes an inner rear bulkhead plate, an outer rear bulkhead plate, and an inner rear bulkhead plate connecting plate. The inner rear bulkhead plate and the outer rear bulkhead plate are installed together and connected and fixed together by the inner rear bulkhead plate connecting plate. The D-ring, the rear windshield reinforcing ring, and the lower edge reinforcing ring of the rear windshield are connected to the rear reinforcing plate 21 of the luggage compartment, forming a "claw"-shaped connection to enhance the connection stability between the three.

[0050] Another embodiment of the present invention provides an automobile including the aforementioned rear frame structure. The advantages of this automobile compared to the prior art are the same as those of the aforementioned rear frame structure, and will not be repeated here.

[0051] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A rear frame structure for automobiles, characterized in that, The system includes multiple reinforcing ring structures formed by a top cover frame assembly (1), an upper crossbeam assembly (2), a rear side frame assembly (3), and a rear floor frame assembly (4). Each reinforcing ring structure includes an upper C-ring and a lower C-ring that are interconnected. The top cover frame assembly (1) includes a rear top cover crossbeam (11). The rear side frame assembly (3) includes a C-pillar inner panel (31). Both ends of the rear top cover crossbeam (11) are connected to the top of the C-pillar inner panel (31). The upper crossbeam assembly (2) includes a front luggage compartment reinforcing plate (22) and a side luggage compartment reinforcing plate (23). Both ends of the front luggage compartment reinforcing plate (22) are connected to the middle of the C-pillar inner panel (31). The rear floor frame assembly (4) includes a rear cast aluminum wheel arch (41) and a rear cast aluminum body (43). The two ends of the front reinforcing plate (22) of the luggage compartment are connected to the rear cast aluminum wheel arch (41) through the corresponding side reinforcing plates (23) of the luggage compartment. The rear cast aluminum body (43) has a groove structure and is located between the rear cast aluminum wheel arches (41) on both sides. The front reinforcing plate (22) of the luggage compartment, the rear crossbeam (11) of the roof and the inner plate (31) of the C-pillar form the upper C-ring. The rear cast aluminum wheel arch (41), the rear cast aluminum body (43), the front reinforcing plate (22) of the luggage compartment and the side reinforcing plate (23) of the luggage compartment form the lower C-ring. The upper crossbeam assembly (2) further includes a rear reinforcing plate (21) for the luggage compartment and a first connecting plate (25). The two ends of the front reinforcing plate (22) for the luggage compartment are respectively connected to the inner panel (31) of the C-pillar via the corresponding first connecting plate (25). The first connecting plate (25) includes a luggage compartment upright plate (251), a luggage compartment upright plate connecting plate (252), and a rear connecting plate (253) for the upper crossbeam. The luggage compartment upright plate (251) has two plates arranged vertically opposite each other, and the two luggage compartment upright plates (251) are connected by a connecting plate. The luggage compartment upright plate connecting plate (252) is connected, the luggage compartment front reinforcing plate (22) is connected to the C-pillar inner plate (31) through the luggage compartment upright plate (251), the upper luggage compartment upright plate (251) is connected to the luggage compartment rear reinforcing plate (21) through the upper crossbeam rear connecting plate (253), the lower luggage compartment upright plate (251) is connected to the rear cast aluminum wheel arch (41), and the luggage compartment upright plate connecting plate (252) is connected to the rear cast aluminum wheel arch (41) and the rear cast aluminum body (43).

2. The rear frame structure of an automobile according to claim 1, characterized in that, The front reinforcing plate (22) of the luggage compartment is provided with a first reinforcing rib (221) extending in the left-right direction of the vehicle, and the side reinforcing plate (23) of the luggage compartment is provided with a second reinforcing rib (231) corresponding to the first reinforcing rib (221), and the first reinforcing rib (221) and the second reinforcing rib (231) are connected.

3. The rear frame structure of an automobile according to claim 1, characterized in that, The upper crossbeam assembly (2) also includes a seat belt retractor mounting plate (26) and a support plate (27). The first connecting plate (25) extends along the front-rear direction of the vehicle. The seat belt retractor mounting plate (26) and the support plate (27) are both located on the first connecting plate (25). The first connecting plate (25) is connected to the inner panel of the C-pillar (31) through the seat belt retractor mounting plate (26) and the support plate (27).

4. The rear frame structure of an automobile according to claim 1, characterized in that, The multiple reinforcing ring structures also include a rear windshield reinforcing ring, the roof frame assembly (1) also includes a C-pillar upper side beam reinforcing plate (12), the two C-pillar upper side beam reinforcing plates (12) are respectively located on the left and right sides of the vehicle, the roof rear crossbeam (11) is connected between the two C-pillar upper side beam reinforcing plates (12), the upper crossbeam assembly (2) also includes a luggage compartment rear reinforcing plate (21), the rear side frame assembly (3) also includes a side outer panel (32), the luggage compartment rear reinforcing plate... The reinforcing plate (21) is located on the rear side of the rear crossbeam (11) of the roof, and the rear reinforcing plate (21) of the luggage compartment is connected between the inner plates (31) of the C-pillar on both sides. The outer side of the inner plate (31) of the C-pillar is provided with the outer side panel (32). The rear crossbeam (11) of the roof, the rear reinforcing plate (21) of the luggage compartment, the two inner plates (31) of the C-pillar, the two upper side beam reinforcing plates (12) of the C-pillar and the two outer side panels (32) together form the rear windshield reinforcing ring.

5. The rear frame structure of an automobile according to claim 4, characterized in that, The multiple reinforcing ring structures also include connecting rings. The rear side frame assembly (3) also includes an upper C-pillar reinforcing plate (33), a lower C-pillar reinforcing plate (34), a middle C-pillar reinforcing plate (35), and a rear wheel arch outer plate (36). The upper C-pillar reinforcing plate (33), the lower C-pillar reinforcing plate (34), and the middle C-pillar reinforcing plate (35) are located at the end of the inner C-pillar plate (31) facing the front of the vehicle. The end of the upper C-pillar reinforcing plate (33) facing the top of the vehicle is connected to the middle C-pillar reinforcing plate (35). The end of the reinforcing plate (33) facing downwards from the car is connected to the lower reinforcing plate (34) of the C-pillar and the outer plate (36) of the rear wheel arch. The end of the middle reinforcing plate (35) of the C-pillar facing upwards from the car is connected to the upper side beam reinforcing plate (12) of the C-pillar. The end of the middle reinforcing plate (35) of the C-pillar facing downwards from the car is connected to the outer plate (36) of the rear wheel arch. The upper reinforcing plate (33), the lower reinforcing plate (34), the middle reinforcing plate (35), and the outer plate (36) of the rear wheel arch together form the connecting ring.

6. The rear frame structure of an automobile according to claim 5, characterized in that, The multiple reinforcing ring structures also include a small side window reinforcing ring, which is formed by the C-pillar upper beam reinforcing plate (12), the C-pillar middle reinforcing plate (35), the C-pillar upper reinforcing plate (33), the C-pillar inner plate (31), and the side outer plate (32).

7. The rear frame structure of an automobile according to claim 6, characterized in that, The multiple reinforcing ring structures also include a rear windshield lower edge reinforcing ring. The rear side frame assembly (3) also includes an upper reinforcing plate (37) on the inner C-pillar. The upper reinforcing plate (37) on the inner C-pillar is located at the end of the inner C-pillar (31) facing the rear of the vehicle, and the upper reinforcing plate (37) on the inner C-pillar is connected to the rear cast aluminum wheel arch (41). The rear floor frame assembly (4) also includes a lower reinforcing beam (44). The lower reinforcing beam (44) is located between the two rear cast aluminum wheel arches (41), and both ends of the lower reinforcing beam (44) are respectively connected to the two rear cast aluminum wheel arches (41). The luggage compartment rear reinforcing plate (21), the upper reinforcing plate (37) on the inner C-pillar, the rear cast aluminum wheel arches (41) and the lower reinforcing beam (44) together form the rear windshield lower edge reinforcing ring.

8. The rear frame structure of an automobile according to claim 7, characterized in that, The multiple reinforcing ring structures also include side reinforcement rings, which are formed by the upper reinforcing plate (37) of the inner plate of the C-pillar, the middle reinforcing plate (35) of the C-pillar, the outer plate of the rear wheel arch (36) and the inner plate of the C-pillar (31).

9. The rear frame structure of an automobile according to claim 4, characterized in that, The multiple reinforcing ring structures also include a D-ring, the rear side frame assembly (3) also includes a rear drainage channel structure (38) and a taillight mounting plate (39), the rear floor frame assembly (4) also includes a rear panel (45), the two ends of the luggage compartment rear reinforcing plate (21) are respectively connected to the corresponding rear drainage channel structure (38), the rear drainage channel structures (38) on both sides are respectively connected to the two ends of the rear panel (45) through the corresponding taillight mounting plate (39), the luggage compartment rear reinforcing plate (21), the rear drainage channel structure (38), the taillight mounting plate (39) and the rear panel (45) together form the D-ring.

10. A car, characterized in that, Including the rear frame structure of a vehicle as described in any one of claims 1-9.

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