Vehicle body side frame structure and vehicle

Abstract

The invention relates to the technical field of vehicle structures, and discloses a vehicle body side wall frame structure and a vehicle, the vehicle body side wall frame structure comprises a side ring assembly, a C column, a top beam, a seat cross beam and a D ring assembly, the side ring assembly comprises a side ring structural part, a first C column outer reinforcing part and a first C column inner reinforcing part, and the D ring assembly comprises a D column and a D column reinforcing part; the top end of the first C-column outer reinforcing piece is fixedly connected with the D-column reinforcing piece, the bottom end of the first C-column outer reinforcing piece is fixedly connected with the side ring structural piece, the D-column reinforcing piece is fixedly connected with the top beam, the bottom end of the first C-column inner reinforcing piece is fixedly connected with the seat cross beam, and the top end of the first C-column inner reinforcing piece is fixedly connected with the top beam. The first C column outer reinforcer, the first C column inner reinforcer, the C column, the top beam and the seat cross beam define a first C ring assembly. The side ring assembly, the first C ring assembly and the D ring assembly are fixedly connected to form a three-in-one surrounding type structure, the structural continuity of the vehicle body side wall is enhanced, and the force transmission path is continuous and stable.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle structures, and in particular to a vehicle body side frame structure and a vehicle. Background Art

[0002] With the development of automobile technology, people have higher and higher requirements for the comfort and safety of car riding. Compared with SUV and MPV models, the advantage of sedans lies in their good handling and comfort. When a vehicle encounters a collision during driving, the collision force is transmitted to the body through the tires, subframes, shock absorbers, etc. The body needs a strong enough structure to ensure that it can withstand a large collision force. The side frame, as the load-bearing skeleton of the car, plays a vital role in the structure and performance of the whole vehicle.

[0003] The side frame is the front and rear structure of the two sections of the vehicle body. The structural connection between the side frame and the C ring and D ring has an important impact on the structural continuity and force transmission effect of the vehicle body. The existing side ring area has poor continuity with the C ring structure. After the C ring structure is connected to the D pillar, it has no connection with the side ring area, resulting in poor structural continuity and low vehicle body rigidity. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle body side frame structure to solve the problems of poor continuity and low vehicle body rigidity of the side frame structure in the prior art; the present invention also provides a vehicle using the vehicle body side frame structure.

[0005] In order to achieve the above-mentioned object, the present invention provides a vehicle body side frame structure, including a side ring assembly, a C-pillar, a top beam, a seat cross beam, and a D-ring assembly, wherein the side ring assembly includes a side ring structure and a first C-pillar outer reinforcement and a first C-pillar inner reinforcement respectively fixedly connected to the side ring structure, and the D-ring assembly includes a D-pillar and a D-pillar reinforcement fixedly connected to the D-pillar.

[0006] The first C-pillar outer reinforcement is fixedly connected to the C-pillar, the top end of the first C-pillar outer reinforcement is fixedly connected to the D-pillar reinforcement, the bottom end of the first C-pillar outer reinforcement is fixedly connected to the side ring structure, the D-pillar reinforcement is fixedly connected to the top beam, the first C-pillar inner reinforcement is fixedly connected to the C-pillar, the bottom end of the first C-pillar inner reinforcement is fixedly connected to the seat cross beam, the top end of the first C-pillar inner reinforcement is fixedly connected to the top beam, the first C-pillar outer reinforcement and the first C-pillar inner reinforcement both extend along the force transmission path of the C-pillar, and the first C-pillar outer reinforcement, the first C-pillar inner reinforcement, the C-pillar, the top beam, and the seat cross beam form a first C-ring assembly.

[0007] Preferably, the body side frame structure also includes a second C-pillar outer reinforcement, a second C-pillar inner reinforcement and a floor crossbeam, the second C-pillar outer reinforcement and the second C-pillar inner reinforcement are both located on the rear side of the first C-ring assembly, the bottom end of the second C-pillar inner reinforcement is fixedly connected to the floor crossbeam, the top end of the second C-pillar inner reinforcement is fixedly connected to the second C-pillar outer reinforcement, the second C-pillar outer reinforcement is fixedly connected to the D-pillar, and the second C-pillar outer reinforcement, the second C-pillar inner reinforcement, the floor crossbeam and the D-pillar form a second C-ring assembly.

[0008] Preferably, the body side frame structure also includes a retractor reinforcement plate fixedly connected to the D-pillar, the D-pillar reinforcement is fixedly connected to the D-pillar, the retractor reinforcement plate has a first connection point, a second connection point and a third connection point, the first connection point is fixedly connected between the second C-pillar inner reinforcement and the second C-pillar outer reinforcement, the second connection point is fixedly connected to the D-pillar along the body height direction, and the third connection point is fixedly connected to the D-pillar along the body width direction.

[0009] Preferably, the D-pillar includes an inner panel, an outer panel and a reinforcing plate, wherein the reinforcing plate is arranged between the inner panel and the outer panel, and the reinforcing plate has an outer convex portion arched toward the outer panel, the outer convex portion is opposite to the rear side window area of ​​the vehicle along the height direction of the vehicle body, and a cavity is enclosed between the outer convex portion and the inner panel.

[0010] Preferably, the arch height of the outer protrusion is in the range of 20 mm to 40 mm.

[0011] Preferably, the side ring structure comprises a front side panel reinforcement frame and a rear side panel reinforcement frame, and the front side panel reinforcement frame is fixed to the rear side panel reinforcement frame by welding.

[0012] Preferably, the D-ring assembly further comprises a roof rear cross beam, the roof rear cross beam is fixedly connected to the D-pillar, and the roof rear cross beam is welded and fixed to the rear side panel reinforcement frame.

[0013] Preferably, the vehicle body side frame structure also includes a rear shock absorber reinforcement plate, which is fixedly connected to the C-pillar, and the rear shock absorber reinforcement plate and the first C-pillar inner reinforcement are located on both sides of the C-pillar, and the cavity of the rear shock absorber reinforcement plate is arranged opposite to the cavity of the first C-pillar inner reinforcement.

[0014] The present invention also provides a vehicle, comprising the vehicle body side frame structure described in any one of the above technical solutions.

[0015] Compared with the prior art, the vehicle body side frame structure and the vehicle of the embodiment of the present invention have the following beneficial effects: the side ring assembly is additionally provided with a first C-pillar outer reinforcement and a first C-pillar inner reinforcement at the position of the C-pillar, and the top end of the first C-pillar outer reinforcement is connected to the top beam through the D-pillar reinforcement, the bottom end of the first C-pillar outer reinforcement is fixedly connected to the side ring structural member, and the first C-pillar inner reinforcement is fixedly connected to the top beam and the seat cross beam, so that the side ring assembly, the first C-ring assembly and the D-ring assembly are fixedly connected to form a three-in-one embracing structure, the structural continuity of the vehicle body side is enhanced, the stiffness and mode of the vehicle body are improved, and the protection of the occupants is correspondingly enhanced, the force on the vehicle can be transmitted to the D-ring assembly via the side wall and the first C-ring assembly, the force transmission path is continuous and stable, the stiffness, NVH performance and diamond mode of the tailgate frame of the whole vehicle are significantly improved, and a safer and more comfortable passenger space is provided for the rear passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the assembly structure of the side ring assembly and the first C ring assembly of the vehicle body side frame structure of the present invention;

[0017] Figure 2 yes Figure 1 A schematic structural diagram of a side ring assembly of a vehicle body side frame structure;

[0018] Figure 3 yes Figure 1 A schematic structural diagram of a first C-ring assembly of a vehicle body side frame structure;

[0019] Figure 4 yes Figure 3 An exploded schematic diagram of the first C-ring assembly;

[0020] Figure 5 It is a schematic diagram of the assembly structure of the D-ring assembly and the second C-ring assembly of the vehicle body side frame structure of the present invention;

[0021] Figure 6 yes Figure 5 A schematic structural diagram of a D-ring assembly of a vehicle body side frame structure;

[0022] Figure 7 yes Figure 5 An assembly diagram of a second C-pillar outer reinforcement and a second C-pillar inner reinforcement of a second C-ring assembly;

[0023] Figure 8 yes Figure 7 A schematic structural diagram of a retractor reinforcement plate of a second C-ring assembly;

[0024] Fig. 9 2 is a structural schematic diagram of a D-pillar of a vehicle body side frame structure of the present invention;

[0025] Fig.10It is a schematic diagram of assembling a rear shock absorber reinforcement plate and a C-pillar of a vehicle body side frame structure of the present invention.

[0026] In the figure, 1, side ring assembly, 11, side ring structural member, 111, front side panel reinforcement frame, 112, rear side panel reinforcement frame, 12, first C-pillar outer reinforcement, 13, first C-pillar inner reinforcement, 2, C-pillar, 3, top beam, 4, seat cross beam, 5, D-ring assembly, 51, D-pillar, 511, inner plate, 512, outer plate, 513, reinforcement plate, 514, outer protrusion, 52, D-pillar reinforcement, 53, top cover rear cross beam, 6, second C-pillar outer reinforcement, 7, second C-pillar inner reinforcement, 8, floor cross beam, 9, first C-ring assembly, 10, second C-ring assembly, 20, retractor reinforcement plate, 201, first connection point, 202, second connection point, 203, third connection point, 30, rear shock absorber reinforcement plate. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] A preferred embodiment of a vehicle body side frame structure of the present invention is as follows Figure 1 As shown, the vehicle body side frame structure includes a side ring assembly 1, a C-pillar 2, a top beam 3, a seat cross beam 4, and a D-ring assembly 5.

[0029] The side ring assembly 1 includes a side ring structure 11, a first C-pillar outer reinforcement 12 and a first C-pillar inner reinforcement 13, the first C-pillar outer reinforcement 12 and the first C-pillar inner reinforcement 13 are both fixedly connected to the side ring structure 11, the first C-pillar outer reinforcement 12 and the first C-pillar inner reinforcement 13 are located in the C-pillar 2 area of ​​the side ring structure 11, the first C-pillar outer reinforcement 12 is fixedly connected to the outer side of the C-pillar 2, and the first C-pillar inner reinforcement 13 is fixedly connected to the inner side of the C-pillar 2, so that the side ring structure 11 and the C-pillar 2 are fixedly connected as a whole, including the continuous and complete door ring structure of the side surround.

[0030] The D-ring assembly 5 includes a D-pillar 51 and a D-pillar reinforcement 52 fixedly connected to the D-pillar 51. The D-pillar reinforcement 52 is located at the top of the D-pillar 51 of the vehicle body. The D-pillar reinforcement 52 is fixedly connected between the D-pillar 51 and the top beam 3 to structurally reinforce the connection position between the D-pillar 51 and the top beam 3 of the D-ring assembly 5.

[0031] like Figure 3 and Figure 4As shown, the top end of the first C-pillar outer reinforcement 12 is fixedly connected to the D-pillar reinforcement 52, and the bottom end of the first C-pillar outer reinforcement 12 is fixedly connected to the side ring structure 11. Because the D-pillar reinforcement 52 is fixedly connected between the D-pillar 51 and the top beam 3, the first C-pillar outer reinforcement 12 is connected to the top beam 3 through the D-pillar reinforcement 52, connecting the side ring assembly 1 and the D-ring assembly 5 as a whole. In this embodiment, the side ring structure 11 includes a sill reinforcement, and the bottom end of the first C-pillar outer reinforcement 12 is fixedly connected to the sill reinforcement.

[0032] The bottom end of the first C-pillar inner reinforcement 13 is fixedly connected to the seat cross beam 4, and the top end of the first C-pillar inner reinforcement 13 is fixedly connected to the top beam 3. The first C-pillar outer reinforcement 12, the first C-pillar inner reinforcement 13, the C-pillar 2, the top beam 3, and the seat cross beam 4 form the first C-ring assembly 9. The first C-pillar outer reinforcement 12 and the first C-pillar inner reinforcement 13 both extend along the force transmission path of the C-pillar 2, thereby improving the continuity of the side enclosure force transmission structure. The first C-pillar outer reinforcement 12 and the first C-pillar inner reinforcement 13 tightly connect the side ring assembly 1 with the first C-ring assembly 9, so that each loop is connected as a whole. The first C-pillar outer reinforcement 12 and the first C-pillar inner reinforcement 13 serve as a link between the side ring assembly 1 and the first C-ring assembly 9, thereby increasing the force transmission between the two loops, thereby improving the overall rigidity of the vehicle body.

[0033] The side ring assembly 1 of the body side frame structure is additionally provided with a first C-pillar outer reinforcement 12 and a first C-pillar inner reinforcement 13 at the position of the C-pillar 2, and the top end of the first C-pillar outer reinforcement 12 is connected to the top beam 3 through the D-pillar reinforcement 52, the bottom end of the first C-pillar outer reinforcement 12 is fixedly connected to the side ring structure 11, and the first C-pillar inner reinforcement 13 is fixedly connected to the top beam 3 and the seat cross beam 4, so that the side ring assembly 1, the first C-ring assembly 9 and the D-ring assembly 5 are fixedly connected to form a three-in-one embracing structure, which enhances the structural continuity of the body side, and the stiffness and mode of the body are improved, and the protection of the occupants is also correspondingly enhanced, the vehicle force can be transmitted to the D-ring assembly 5 through the side ring structure 11 and the first C-ring assembly 9, the force transmission path is continuous and stable, the vehicle stiffness, NVH performance, and the diamond mode of the tailgate frame are significantly improved, and a safer and more comfortable passenger space is provided for the rear passengers.

[0034] Preferably, the vehicle body side frame structure also includes a second C-pillar outer reinforcement 6, a second C-pillar inner reinforcement 7 and a floor crossbeam 8. The second C-pillar outer reinforcement 6 and the second C-pillar inner reinforcement 7 are both located on the rear side of the first C-ring assembly 9. The bottom end of the second C-pillar inner reinforcement 7 is fixedly connected to the floor crossbeam 8. The top end of the second C-pillar inner reinforcement 7 is fixedly connected to the second C-pillar outer reinforcement 6. The second C-pillar outer reinforcement 6 is fixedly connected to the D-pillar 51. The second C-pillar outer reinforcement 6, the second C-pillar inner reinforcement 7, the floor crossbeam 8 and the D-pillar 51 form a second C-ring assembly 10.

[0035] like Figure 5 As shown, the second C-pillar inner reinforcement 7 is fixedly connected between the floor crossbeam 8 and the second C-pillar outer reinforcement 6, and is fixedly connected to the D-pillar 51 through the second C-pillar outer reinforcement 6, forming a second C-ring assembly 10, and the second C-ring assembly 10 and the D-ring assembly 5 are fixedly connected as a whole, so that the first C-ring assembly 9, the second C-ring assembly 10, the D-ring assembly 5 and the side ring assembly 1 form a three-in-one enveloping structure, which increases the continuity of the vehicle body structure, improves the vehicle body rigidity, and provides a safe and comfortable passenger space for rear passengers.

[0036] At the same time, the first C-ring assembly 9 and the second C-ring assembly 10 form a double C-ring structure. When the vehicle body is subjected to force, the force in the Z direction is transmitted to the D-ring assembly 5 through the double C-ring structure, thereby optimizing the force transmission path of the vehicle body and improving the safety performance and NVH performance of the vehicle.

[0037] Preferably, the body side frame structure also includes a retractor reinforcement plate 20 fixedly connected to the D-pillar 51, the D-pillar reinforcement 52 is fixedly connected to the D-pillar 51, the retractor reinforcement plate 20 has a first connection point 201, a second connection point 202 and a third connection point 203, the first connection point 201 is fixedly connected between the second C-pillar inner reinforcement 7 and the second C-pillar outer reinforcement 6, the second connection point 202 is fixedly connected to the D-pillar 51 along the body height direction, and the third connection point 203 is fixedly connected to the D-pillar 51 along the body width direction.

[0038] like Figure 7 and Figure 8 As shown, the retractor reinforcement plate 20 is fixedly connected to the second C-pillar inner reinforcement 7, the second C-pillar outer reinforcement 6 and the D-pillar 51 through the first connection point 201, the second connection point 202 and the third connection point 203, so that the retractor reinforcement plate 20 is connected to the second C-ring assembly 10 and the D-ring assembly 5 as a whole, and the connectivity between the loops is enhanced. Since the second connection point 202 and the third connection point 203 are connected to the D-pillar 51 along the height direction and the width direction of the vehicle body respectively, the retractor reinforcement plate 20 and the D-pillar 51 are bidirectionally connected, and the strength of the retractor fixing point is improved.

[0039] Preferably, the D-pillar 51 includes an inner panel 511, an outer panel 512 and a reinforcing panel 513. The reinforcing panel 513 is arranged between the inner panel 511 and the outer panel 512. The reinforcing panel 513 has an outer protrusion 514 arched toward the outer panel 512. The outer protrusion 514 is opposite to the rear side window area of ​​the vehicle along the height direction of the vehicle body. A cavity is enclosed between the outer protrusion 514 and the inner panel 511.

[0040] The D-pillar 51 is an important structure of the D-ring assembly 5, and the size of its cavity is positively correlated with the stiffness of the vehicle and the diamond mode of the tailgate frame. The rear side windows of hatchback cars are usually streamlined along the shape of the D-pillar 51. In order to pursue the ultimate experience of the rear passenger's field of vision, the cavity size of the D-pillar 51 is compressed upward. In order to meet the requirements of the arrangement of the gas spring strut, the cavity size of the D-pillar 51 is compressed downward; and affected by the traditional process of Y-up parts, traditional hatchback cars cannot achieve the ultimate size of the rear side windows, or sacrifice some performance to pursue the ultimate window frame size.

[0041] like Fig. 9 As shown, in this embodiment, a reinforcing plate 513 is provided between the inner plate 511 and the outer plate 512 of the D-pillar 51, and the outer protrusion 514 of the reinforcing plate 513 is opposite to the rear side window area of ​​the vehicle along the height direction of the vehicle body, and a cavity is formed between the outer protrusion 514 and the inner plate 511, which improves the overall rigidity of the D-ring assembly 5. Combined with the first C-ring assembly 9, the second C-ring assembly 10, the D-ring assembly 5 and the side ring assembly 1, the structural strength of the rear side window area is further improved, thereby improving the rigidity of the whole vehicle and the diamond mode of the tailgate frame. The application of this body structure can achieve the extreme size and width of the rear side window without affecting the whole vehicle performance such as the body rigidity, strength and tailgate mode.

[0042] Since the reinforcing plate 513 of the D-pillar 51 has an outer protrusion 514, when assembling the D-pillar 511, the reinforcing plate 513 is deflected 10° relative to the side outer panel 512 and then pushed along the Y direction (the front and rear direction of the vehicle body), and the outer protrusion 514 passes over the rounded corner of the outer panel 512 and then pushes upward. The assembly is carried out by flipping the upper part, which solves the problem of welding the tip of the D-pillar 51. On the premise of meeting the performance requirements of the entire vehicle, the flexibility of the design of the shape / size of the rear side window is improved.

[0043] Preferably, the arch height of the outer protrusion 514 ranges from 20 mm to 40 mm.

[0044] The arch height of the outer protrusion 514 is between 20-40 mm, and this size can ensure that the cavity surrounded by the outer protrusion 514 and the inner plate 511 of the D-pillar 51 has sufficient strength. In this embodiment, the arch height of the outer protrusion 514 is 30 mm.

[0045] Preferably, the side ring structure 11 includes a front side panel reinforcement frame 111 and a rear side panel reinforcement frame 112 , and the front side panel reinforcement frame 111 and the rear side panel reinforcement frame 112 are welded and fixed.

[0046] The front side panel reinforcement frame 111 and the rear side panel reinforcement frame 112 of the side ring structure 11 are welded and fixed. The welding method can improve the connection strength at the lap joint, and the structural force transmission skeleton is more stable and reliable, while reducing the use of structural adhesive and reducing the production cost.

[0047] When welding the conventional side ring structure 11, the side outer panel 512 and the front side reinforcement frame 111 are first welded into a small assembly, and then the rear side reinforcement frame 112 is welded to the aforementioned welded small assembly. This welding process results in the joint between the front side reinforcement frame 111 and the rear side reinforcement frame 112 being located inside the cavity of the side outer panel 512, and can only be connected using structural adhesive, resulting in poor joint strength.

[0048] In this embodiment, when welding the side ring structure 11, the front side panel reinforcement frame 111 and the rear side panel reinforcement frame 112 are first welded into a small assembly, and then the side panel outer panel 512 is welded to the small assembly. At this time, the joint between the front side panel reinforcement frame 111 and the rear side panel reinforcement frame 112 is not affected by the side panel outer panel 512, and resistance spot welding can be used instead of structural adhesive connection to improve the connection strength of the lap joint and reduce the use of structural adhesive.

[0049] Preferably, the D-ring assembly 5 further includes a top cover rear cross beam 53 , which is fixedly connected to the D-pillar 51 , and is welded and fixed to the rear side panel reinforcement frame 112 .

[0050] The side ring assembly 1 is welded and fixed to the rear side panel reinforcement frame 112 and the top cover rear cross beam 53 of the D-ring assembly 5, replacing the traditional bolt connection method, thereby reducing the manufacturing cost and improving the connection strength at the joint between the side ring assembly 1 and the D-ring assembly 5.

[0051] Preferably, the vehicle body side frame structure also includes a rear shock absorber reinforcement plate 30, which is fixedly connected to the C-pillar 2. The rear shock absorber reinforcement plate 30 and the first C-pillar inner reinforcement 13 are located on both sides of the C-pillar 2, and the cavity of the rear shock absorber reinforcement plate 30 is arranged opposite to the cavity of the first C-pillar inner reinforcement 13.

[0052] like Fig.10 As shown, the cavity of the rear shock absorber reinforcement plate 30 is arranged opposite to the cavity of the first C-pillar inner reinforcement 13, and the overlap of the two cavities significantly improves the dynamic stiffness. The force generated by the shock absorber is transmitted through the first C-ring assembly 9, thereby improving the dynamic stiffness of the rear shock absorber.

[0053] The present invention also provides a preferred embodiment of a vehicle, comprising a body side frame structure, the specific structure of the body side frame structure is the same as the specific structure of the body side frame structure in any of the above embodiments, and will not be repeated here.

[0054] In summary, the embodiments of the present invention provide a body side frame structure and a vehicle, wherein a side ring assembly is additionally provided with a first C-pillar outer reinforcement and a first C-pillar inner reinforcement at the position of the C-pillar, and the top end of the first C-pillar outer reinforcement is connected to the top beam through the D-pillar reinforcement, the bottom end of the first C-pillar outer reinforcement is fixedly connected to the side ring structural member, and the first C-pillar inner reinforcement is fixedly connected to the top beam and the seat cross beam, so that the side ring assembly, the first C-ring assembly and the D-ring assembly are fixedly connected to form a three-in-one embracing structure, which enhances the structural continuity of the body side, and improves the stiffness and mode of the body, and the protection of the occupants is correspondingly enhanced, the force on the vehicle can be transmitted to the D-ring assembly via the side wall and the first C-ring assembly, the force transmission path is continuous and stable, and the stiffness, NVH performance and diamond mode of the tailgate frame of the whole vehicle are significantly improved, providing a safer and more comfortable passenger space for the rear passengers.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A vehicle body side frame structure, characterized in that: The invention comprises a side ring assembly (1), a C-pillar (2), a top beam (3), a seat cross beam (4), and a D-ring assembly (5); the side ring assembly (1) comprises a side ring structure (11) and a first C-pillar outer reinforcement (12) and a first C-pillar inner reinforcement (13) respectively fixedly connected to the side ring structure (11); the D-ring assembly (5) comprises a D-pillar (51) and a D-pillar reinforcement (52) fixedly connected to the D-pillar (51); The first C-pillar outer reinforcement (12) is fixedly connected to the C-pillar (2), the top end of the first C-pillar outer reinforcement (12) is fixedly connected to the D-pillar reinforcement (52), the bottom end of the first C-pillar outer reinforcement (12) is fixedly connected to the side ring structure (11), the D-pillar reinforcement (52) is fixedly connected to the top beam (3), the first C-pillar inner reinforcement (13) is fixedly connected to the C-pillar (2), the bottom end of the first C-pillar inner reinforcement (13) is fixedly connected to the seat cross beam (4), the top end of the first C-pillar inner reinforcement (13) is fixedly connected to the top beam (3), the first C-pillar outer reinforcement (12) and the first C-pillar inner reinforcement (13) both extend along the force transmission path of the C-pillar (2), and the first C-pillar outer reinforcement (12), the first C-pillar inner reinforcement (13), the C-pillar (2), the top beam (3), and the seat cross beam (4) form a first C-ring assembly (9).

2. The vehicle body side frame structure according to claim 1, characterized in that: The vehicle body side frame structure further comprises a second C-pillar outer reinforcement (6), a second C-pillar inner reinforcement (7) and a floor cross beam (8); the second C-pillar outer reinforcement (6) and the second C-pillar inner reinforcement (7) are both located at the rear side of the first C-ring assembly (9); the bottom end of the second C-pillar inner reinforcement (7) is fixedly connected to the floor cross beam (8); the top end of the second C-pillar inner reinforcement (7) is fixedly connected to the second C-pillar outer reinforcement (6); the second C-pillar outer reinforcement (6) is fixedly connected to the D-pillar (51); the second C-pillar outer reinforcement (6), the second C-pillar inner reinforcement (7), the floor cross beam (8) and the D-pillar (51) form a second C-ring assembly (10).

3. The vehicle body side frame structure according to claim 2, characterized in that: The vehicle body side frame structure also includes a retractor reinforcement plate (20) fixedly connected to the D-pillar (51); the D-pillar reinforcement (52) is fixedly connected to the D-pillar (51); the retractor reinforcement plate (20) has a first connection point (201), a second connection point (202) and a third connection point (203); the first connection point (201) is fixedly connected between the second C-pillar inner reinforcement (7) and the second C-pillar outer reinforcement (6); the second connection point (202) is fixedly connected to the D-pillar (51) along a vehicle body height direction; and the third connection point (203) is fixedly connected to the D-pillar (51) along a vehicle body width direction.

4. The vehicle body side frame structure according to any one of claims 1 to 3, characterized in that: The D-pillar (51) comprises an inner plate (511), an outer plate (512) and a reinforcing plate (513); the reinforcing plate (513) is arranged between the inner plate (511) and the outer plate (512); the reinforcing plate (513) has an outer convex portion (514) arched toward the outer plate (512); the outer convex portion (514) is opposite to the rear side window area of ​​the vehicle along the height direction of the vehicle body; a cavity is enclosed between the outer convex portion (514) and the inner plate (511).

5. The vehicle body side frame structure according to claim 4, characterized in that: The arch height of the outer protrusion (514) ranges from 20 mm to 40 mm.

6. The vehicle body side frame structure according to any one of claims 1 to 3, characterized in that: The side ring structure (11) comprises a front side panel reinforcement frame (111) and a rear side panel reinforcement frame (112), and the front side panel reinforcement frame (111) and the rear side panel reinforcement frame (112) are fixed by welding.

7. The vehicle body side frame structure according to claim 6, characterized in that: The D-ring assembly (5) further comprises a top cover rear cross beam (53), wherein the top cover rear cross beam (53) is fixedly connected to the D-pillar (51), and the top cover rear cross beam (53) is welded and fixed to the rear side panel reinforcement frame (112).

8. The vehicle body side frame structure according to any one of claims 1 to 3, characterized in that: The vehicle body side frame structure also includes a rear shock absorber reinforcement plate (30), the rear shock absorber reinforcement plate (30) is fixedly connected to the C-pillar (2), the rear shock absorber reinforcement plate (30) and the first C-pillar inner reinforcement (13) are located on both sides of the C-pillar (2), and the cavity of the rear shock absorber reinforcement plate (30) and the cavity of the first C-pillar inner reinforcement (13) are arranged opposite to each other.

9. A vehicle, characterized in that: It comprises the vehicle body side frame structure as described in any one of claims 1-8.

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