Vehicle body structure

Abstract

The invention discloses a vehicle body structure which comprises a doorsill, a rear wheel cover and an anti-collision beam. The doorsill comprises a doorsill body and a reinforcing assembly, and the reinforcing assembly is connected with the doorsill body and the rear wheel cover. The reinforcing assembly extends towards the top of the automobile body in the direction towards the rear wheel cover to form a step part, and the end, connected with the rear wheel cover, of the reinforcing assembly is close to the top of the automobile body relative to the threshold body. Orthographic projections of the anti-collision beam and the step part on the reference plane are overlapped, and the reference plane is perpendicular to the direction, pointing to the step part, of the anti-collision beam. In this way, the side face rigidity of the vehicle body can be improved, and safety is improved.

Description

Technical Field

[0001] The present application belongs to the field of automobile technology, and specifically relates to a vehicle body structure. Background Art

[0002] With the rapid development of the automobile industry, automobile safety standards have been upgraded to side collision conditions, and higher requirements have been put forward for safety issues under side collision conditions.

[0003] As a key structure to withstand side impact, the strength of the door sill structure itself and the strength of its connection with the A-pillar, B-pillar, C-pillar, wheel cover, etc. are particularly critical. However, the existing door sill structure and related structures are difficult to meet the rigidity requirements of the new side impact test for the vehicle body. Summary of the invention

[0004] The present application provides a vehicle body structure that can increase the side rigidity of the vehicle body and improve safety.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a vehicle body structure, including a door sill, a rear wheel cover and an anti-collision beam; wherein the door sill includes a door sill body and a reinforcement component, and the reinforcement component connects the door sill body and the rear wheel cover; along the direction toward the rear wheel cover, the reinforcement component extends toward the top of the vehicle body to form a step portion, and the end of the reinforcement component connected to the rear wheel cover is close to the top of the vehicle body relative to the door sill body; the anti-collision beam overlaps with the orthographic projection of the step portion on a reference plane, and the reference plane is perpendicular to the direction of the anti-collision beam pointing to the step portion.

[0006] Preferably, the reinforcement assembly further comprises a first connection portion and a second connection portion, wherein the first connection portion and the second connection portion are respectively smoothly connected to opposite ends of the step portion; the first connection portion is connected to the door sill body, and the second connection portion is connected to the rear wheel cover. The first connection portion is used to increase the connection strength between the reinforcement assembly and the door sill body, and the second connection portion is used to increase the connection strength between the reinforcement assembly and the rear wheel cover.

[0007] Preferably, the step portion includes an inclined section, a straight section and an arc section, and the two ends of the arc section smoothly connect the inclined section and the straight section respectively; along the direction toward the rear wheel housing, the inclined section extends obliquely toward the top of the vehicle body; the straight section extends along the direction toward the rear wheel housing; the first connecting portion is connected to the inclined section, and the second connecting portion is connected to the straight section. The inclined section is used to gradually increase the height of the step portion, ensuring sufficient overlap between the step portion and the anti-collision beam while avoiding the step portion being too wide in the first direction to affect passengers getting on and off the vehicle; the straight section extends along the direction toward the rear wheel housing, ensuring the overlap while ensuring the connection strength with the rear wheel housing; the arc section ensures the overlap with the anti-collision beam and the convenience of passengers getting on and off the vehicle.

[0008] Preferably, the threshold body includes an inner threshold and an outer threshold body connected to each other; the reinforcement component includes an outer threshold joint, the first connection portion of the outer threshold joint is connected to the side of the outer threshold body facing the inner threshold; the second connection portion of the outer threshold joint is connected to the rear wheel cover.

[0009] Preferably, a cavity is formed between the inner door sill and the outer door sill joint, and the reinforcement assembly further includes a support member disposed in the cavity. The cavity can effectively absorb impact energy and improve side impact performance. The support member further improves the supporting capacity of the reinforcement assembly, ensures the supporting effect on the anti-collision beam, and improves the safety performance of the entire vehicle.

[0010] Preferably, one end of the support member is connected to the outer threshold joint, and a gap is formed between the other end of the support member and the inner threshold. This structure not only ensures the supporting capacity of the reinforcement component, but also facilitates the assembly of the vehicle body structure.

[0011] Preferably, the support member includes a first support plate and a second support plate arranged at intervals, and the support member also includes a connecting plate connecting the ends of the first support plate and the second support plate, and one end of the first support plate and the second support plate away from the connecting plate is connected to one of the outer threshold joints. The support member structure in the shape of the Chinese character "X" has a strong supporting performance. After being impacted, the connecting plate abuts against the inner threshold, and the support member is not easily deformed.

[0012] Preferably, the support member further comprises a reinforcing plate, the edge of which is connected to the first support plate, the second support plate and the inner wall of the connecting plate.

[0013] Preferably, the inner sill includes an inner sill body and an inner sill joint, the inner sill joint is respectively connected to the inner sill body and the rear wheel cover at two opposite ends, and along the direction toward the rear wheel cover, the inner sill joint extends toward the top of the vehicle body to connect to the rear wheel cover, and the side of the inner sill joint facing the cavity is connected to the outer sill joint.

[0014] Preferably, the support member is disposed between the inner threshold joint and the outer threshold joint. The above arrangement enables the support member to fill the cavity between the inner threshold joint and the outer threshold joint to the maximum extent, so as to ensure its supporting strength.

[0015] Different from the prior art, the beneficial effects of the present application are as follows: the vehicle body structure provided by the present application adds a reinforcement component to the rear section of the door sill, that is, the end of the door sill body close to the rear wheel cover. Since the reinforcement component has a step portion that is higher than the door sill body, and the bottom end of the anti-collision beam on the rear door gradually extends toward the connection between the rear wheel cover and the door sill, the rear part of the door sill body is increased by setting the step portion, thereby increasing the overlap between the anti-collision beam and the door sill. As a result, when the vehicle body structure is hit from the side, the anti-collision beam on the rear door gradually deforms inward until the step portion of the reinforcement component resists the anti-collision. The step portion disperses the impact force, preventing it from continuing to invade the vehicle compartment, thereby ensuring the side stiffness of the vehicle body and ensuring the safety of the vehicle body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 This is a structural schematic diagram of an implementation method of a vehicle body structure of the present application;

[0018] Figure 2 This is a structural schematic diagram of an implementation method of a strengthening component of the present application;

[0019] Figure 3 A partial structural diagram of the outer door sill body is hidden for the vehicle body structure of this application;

[0020] Figure 4 This is a structural schematic diagram of an implementation scheme of a reinforcement assembly of the present application;

[0021] Figure 5 This is a structural schematic diagram of an implementation scheme of a support member of the present application;

[0022] Figure 6 This is a structural schematic diagram of another embodiment of the support member of the present application;

[0023] Figure 7 This is a schematic diagram of the partial structure of the inner sill and the rear wheel arch of the present application.

[0024] Explanation of the reference numerals in the drawings:

[0025] 100, body structure; 10, sill; 101, cavity; 11, sill body; 111, inner sill; 1111, inner sill body; 1112, inner sill joint; 112, outer sill body; 12, strengthening component; 121, outer sill joint; 1210, step portion; 1210a, inclined section; 1210b, arc section; 1210c, straight section; 1211, first connecting portion; 1212, second connecting portion; 1212a, first flanging; 1212b, second flanging; 1213, third flanging; 1214, fourth flanging; 122, support member; 1221, first support plate; 1222, second support plate; 1223, connecting plate; 1224, reinforcing plate; 1225, third support plate; 1226, fourth support plate; 1227, first connecting plate; 1228, second connecting plate; 1229, third connecting plate; 20, rear wheel arch; 21, rear wheel arch body; 22, rear wheel arch connecting plate; 30, anti-collision beam. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic diagram of a structure of an embodiment of the body structure of the present application, Figure 2 and which is a schematic diagram of a structure of an embodiment of the strengthening component of the present application. The body structure 100 includes a sill 10, a rear wheel arch 20 and an anti-collision beam 30. Among them, the sill 10 includes a sill body 11 and a strengthening component 12, and the strengthening component 12 connects the sill body 11 and the rear wheel arch 20. Specifically, the sill body 11 includes an inner sill 111 and an outer sill body 112. The inner sill 111 and the outer sill body 112 both extend along the first direction shown by X in the figure. The cross-sections of the inner sill 111 and the outer sill body 112 are both in a U-shape, and they are welded at the flanging, and a cavity is formed between them. The rear wheel arch 20 includes a rear wheel arch body 21 and a rear wheel arch connecting plate 22 that are connected to each other, and the rear wheel arch connecting plate 22 is connected to the bottom of the rear wheel arch body 21. As Figure 2As shown, along the direction toward the rear wheel housing 20 (the first direction X), the reinforcement component 12 extends toward the top of the vehicle body (i.e., along the third direction shown by Z in the figure) to form a step portion 1210, and one end of the reinforcement component 12 connected to the rear wheel housing 20 is close to the top of the vehicle body relative to the threshold body 11, that is, the step portion 1210 of the reinforcement component 12 is higher than the threshold body 11. Specifically, the height of the step portion 1210 above the threshold body 11 in the third direction Z is 85 mm; the anti-collision beam 30 overlaps with the positive projection of the step portion 1210 on the reference plane, the reference plane is perpendicular to the direction of the anti-collision beam 30 pointing to the step portion 1210, and the reference plane is the plane where the first direction X and the third direction Z are located.

[0028] The present application adds a reinforcement component 12 to the rear section of the door sill 10, that is, the end of the door sill body 11 close to the rear wheel cover 20. Since the reinforcement component 12 has a step portion 1210 that is higher than the door sill body 11, and since the bottom end of the anti-collision beam 30 on the rear door gradually extends toward the connection between the rear wheel cover and the door sill 10, the rear portion of the door sill body 11 is increased by providing the step portion 1210, thereby increasing the overlap between the anti-collision beam 30 and the door sill 10. As a result, when the vehicle body structure 100 is subjected to a side impact (in a second direction perpendicular to the reference plane), the anti-collision beam 30 on the rear door gradually deforms inward until the step portion 1210 of the reinforcement component 12 resists the anti-collision beam 30, preventing it from continuing to invade the vehicle compartment. The step portion 1210 disperses the impact force, ensures the side rigidity of the vehicle body, and ensures the safety of the vehicle body structure 100.

[0029] Optionally, continue to Figure 2 Combined with Figure 3 , Figure 3 The partial structural diagram of the outer sill body is hidden for the vehicle body structure of this application. The reinforcement component 12 includes an outer sill joint 121, and the outer sill joint 121 also includes a first connection portion 1211 and a second connection portion 1212. The first connection portion 1211 and the second connection portion 1212 are respectively smoothly connected to the opposite ends of the step portion 1210; the first connection portion 1211 is connected to the sill body 11, and the second connection portion 1212 is connected to the rear wheel cover 20. Specifically, the first connection portion 1211 is located at the outer sill body 112 ( Figure 3The first connecting portion 1211 is a side of the inner door sill 111 (not shown) and is welded to the outer door sill body 112. The length of the first connecting portion 1211 in the first direction X is ≥100 mm, that is, the overlap amount of the reinforcing component 12 and the outer door sill body 112 in the first direction X is ≥100 mm, thereby further increasing the strength of the door sill 10. The second connecting portion 1212 is a flange away from one end of the first connecting portion 1211. Multiple flanges can be provided, including a first flange 1212a located at the top of the step portion 1210 and facing the rear wheel housing 20, and a second flange 1212b located below the first flange 1212a and turned outward to the side away from the inner door sill 111. The first flange 1212a and the second flange 1212b are both welded to the rear wheel housing 20 to achieve the connection between the second connecting portion 1212 and the rear wheel housing 20, wherein the first flange 1212a is welded to the rear wheel housing body 21, and the second flange 1212b is welded to the rear wheel housing body 21 and the rear wheel housing connecting plate 22. Furthermore, the outer threshold joint 121 also includes a third flange 1213 located at the top of the step portion 1210 and a fourth flange 1214 located at the bottom of the outer threshold joint 121 . The third flange 1213 and the fourth flange 1214 are welded to the upper and lower flanges of the inner threshold 111 , respectively.

[0030] Optionally, continue to Figure 2 and Figure 3 The step portion 1210 includes an inclined section 1210a, a straight section 1210c and an arc section 1210b, and two ends of the arc section 1210b are smoothly connected to the inclined section 1210a and the straight section 1210c. Along the direction toward the rear wheel housing 20 (the first direction X), the inclined section 1210a extends obliquely toward the top of the vehicle body. The inclined section 1210a is a concave arc. The inclined section 1210a is used to gradually increase the height of the step portion 1210, thereby ensuring sufficient overlap between the step portion 1210 and the anti-collision beam 30, while preventing the step portion 1210 from being too wide in the first direction X to affect passengers getting on and off the vehicle; the straight section 1210c extends along the direction toward the rear wheel housing 20, ensuring the overlap while ensuring the connection strength with the rear wheel housing 20; the first connecting portion 1211 is connected to the inclined section 1210a, and the second connecting portion 1212 is connected to the straight section 1210c; the arc section 1210b is used to smoothly connect the inclined section 1210a and the straight section 1210c, so that the stress at this position is more dispersed and stress concentration is less likely to occur. Specifically, the width of the straight section 1210c along the first direction X is 85mm, and the radius of curvature of the arc section 1210b is 30mm-35mm (for example, 32mm), which maximizes the overlap with the anti-collision beam 30 while ensuring the convenience of passengers getting on and off the vehicle.

[0031] Alternatively, if Figure 3As shown, the sill body 11, the outer sill joint 121 and the rear wheel cover 20 together form a cavity 101, which can effectively absorb the impact energy and improve the side impact performance. The reinforcement component 12 also includes a support member 122 ( Figure 3 The support member 122 further improves the supporting capacity of the reinforcing assembly 12, ensures the supporting effect on the anti-collision beam 30, and improves the safety performance of the whole vehicle.

[0032] Optionally, see Figure 4 , Figure 4 1 is a schematic diagram of the structure of an embodiment of the reinforcement assembly of the present application. One end of the support member 122 is connected to the outer threshold joint 121, and a gap is formed between the other end of the support member 122 and the inner threshold 111. This structure not only ensures the support capacity of the reinforcement assembly 12, but also facilitates the assembly of the vehicle body structure 100. This embodiment is assembled by the following steps: First, the support member 122 is welded to the side of the outer threshold joint 121 facing the inner threshold 111 to form a gap as shown in FIG. Figure 4 The reinforcement assembly 12 is then welded to the inner door sill 111 and the rear wheel cover 20. Specifically, the upper and lower flanges on the inner side of the outer door sill joint 121 are welded to the inner door sill 111 and the rear wheel cover 20. The support member 122 is located in the space between the outer door sill joint 121 and the inner door sill 111, as shown. Figure 3 As shown, at this time, only the outer threshold joint 121 is welded and fixed to the inner threshold 111, and there is a gap between the support member 122 and the inner threshold 111; finally, the outer threshold body 112 is covered on the side of the reinforcement component 12 away from the inner threshold 111, and the outer threshold body 112 is welded and fixed to the inner threshold 111 by flanging, and the outer threshold body 112 is welded and fixed to the reinforcement component 12. Specifically, the outer threshold body 112 can be fixed to the reinforcement component 12 by plug welding, as shown in FIG. Figure 1 In other embodiments, one end of the support member 122 may be connected to the inner threshold 111, and a gap is formed between the other end and the outer threshold joint 121. The assembly sequence of this embodiment is to first fix the inner threshold 111 to the reinforcement assembly 12, then fix the outer threshold joint 121 to the inner threshold 111, and finally fix the outer threshold body 112.

[0033] Optionally, see Figure 5 , Figure 5The structural schematic diagram of an embodiment of the support member of the present application. The support member 122 includes a first support plate 1221 and a second support plate 1222 arranged at intervals, and the support member 122 also includes a connecting plate 1223 connecting the ends of the first support plate 1221 and the second support plate 1222, and the ends of the first support plate 1221 and the second support plate 1222 facing away from the connecting plate 1223 are connected to the outer threshold joint 121. Specifically, the first support plate 1221, the connecting plate 1223 and the second support plate 1222 are connected in sequence to form a "J"-shaped structure, and the ends of the first support plate 1221 and the second support plate 1222 facing away from the connecting plate 1223 are provided with flanges, and the top of the first support plate 1221 is provided with flanges, and the support member 122 is welded to the inner wall of the outer threshold joint 121 through the flanges, and the distance between the first support plate 1221 and the second support plate 1222 gradually increases along the direction of the flanges pointed to by the connecting plate 1223, so that the support member 122 has a strong supporting capacity and is not easy to deform. There is a 5mm gap between the connecting plate 1223 and the inner door sill 111, which provides space for deformation and assembly. The structure of the "X"-shaped support member 122 has strong support performance. After being hit, the connecting plate 1223 abuts against the inner door sill 111, and the impact force is dispersed through the first support plate 1221 and the second support plate 1222 to avoid stress concentration, and the support member 122 is not easy to deform.

[0034] Further, see Figure 5 , the support member 122 further includes a reinforcing plate 1224, the edges of which are connected to the inner walls of the first support plate 1221, the second support plate 1222 and the connecting plate 1223. Specifically, the three edges of the reinforcing plate 1224 are respectively welded and fixed to the inner walls of the first support plate 1221, the second support plate 1222 and the connecting plate 1223 to improve the strength of the support member 122 and further reduce the degree of deformation of the support member 122. In other embodiments, the support member 122 may also be in other shapes. The number of reinforcing plates 1224 may also be two or more, for example, a plurality of reinforcing plates 1224 are arranged in parallel and spaced apart, or three reinforcing plates 1224 form an I-shaped structure.

[0035] Alternatively, see Figure 6 , Figure 6The support member 122 includes a first support plate 1221, a second support plate 1222, a third support plate 1225 and a fourth support plate 1226 which are arranged at intervals, and the four support plates are connected end to end to form a W-shaped structure. Optionally, the support member 122 also includes a first connecting plate 1227, a second connecting plate 1228 and a third connecting plate 1229, one end of the first support plate 1221 is connected to one end of the second support plate 1222 through the first connecting plate 1227, the end of the second support plate 1222 away from the first connecting plate 1227 is connected to one end of the third support plate 1225 through the second connecting plate 1228, the end of the third support plate 1225 away from the second connecting plate 1228 is connected to one end of the fourth support plate 1226 through the third connecting plate 1229, one end of the first support plate 1221 away from the first connecting plate 1227 and one end of the fourth support plate 1226 away from the third connecting plate 1229 are both provided with flanges, the support member 122 is welded to the inner wall of the outer threshold joint 121 through the flange, and there is a 5 mm gap between the first connecting plate 1227 and the third connecting plate 1229 and the inner threshold 111, providing space for deformation and assembly. Along the direction of the first connecting plate 1227 pointing to the flange, the distance between the first support plate 1221 and the second support plate 1222 gradually increases, the distance between the third support plate 1225 and the fourth support plate 1226 gradually increases, and the distance between the second support plate 1222 and the third support plate 1225 gradually decreases. Optionally, through holes are provided on the first support plate 1221, the second support plate 1222, the third support plate 1225, the fourth support plate 1226, the first connecting plate 1227 and the third connecting plate 1229 for leaking liquid and reducing the weight of the support member 122. The W-shaped support member 122 structure has strong supporting performance. After being impacted, the first connecting plate 1227 and the third connecting plate 1229 abut against the inner door sill 111, and the impact force is dispersed through the four supporting plates to avoid stress concentration, and the support member 122 is not easily deformed. Optionally, one or more of the space between the first support plate 1221 and the second support plate 1222, the space between the second support plate 1222 and the third support plate 1225, and the space between the third support plate 1225 and the fourth support plate 1226 can be respectively provided with a reinforcement plate (not shown), and one side of the reinforcement plate can also be connected to the first connecting plate 1227, the second connecting plate 1228 or the third connecting plate 1229 to further enhance the strength of the support member 122.

[0036] Optionally, see Figure 7 , Figure 7This is a partial structural schematic diagram of the inner sill and the rear wheelhouse of the present application. The inner sill 111 includes an inner sill body 1111 and an inner sill joint 1112. The two opposite ends of the inner sill joint 1112 are respectively connected to the inner sill body 1111 and the rear wheelhouse 20. One end of the inner sill joint 1112 is welded and fixed to one end of the inner sill body 1111 close to the rear wheelhouse 20. The end of the inner sill joint 1112 close to the inner sill body 1111 is welded to the side of the inner sill body 1111 facing away from the outer sill body 112 ( Figure 6 not shown). The other end of the inner sill joint 1112 is welded and fixed to the rear wheelhouse 20. The end of the inner sill joint 1112 close to the rear wheelhouse 20 is welded to the side of the rear wheelhouse 20 facing away from the outer sill body 112 ( Figure 6 not shown). Along the direction towards the rear wheelhouse 20, the inner sill joint 1112 extends towards the top of the vehicle body to connect to the rear wheelhouse 20. The side of the inner sill joint 1112 facing the cavity 101 is connected to the outer sill joint 121. Along the first direction X, the cross-section of the inner sill joint 1112 is also in a U-shape, and the inner sill joint 1112 has two flanges, upper and lower. The inner sill joint 1112 is welded to the outer sill joint 121 ( Figure 6 not shown) through the two flanges.

[0037] Optionally, in combination with Figure 5 and Figure 7 , a support member 122 is provided between the inner sill joint 1112 and the outer sill joint 121. Specifically, along the first direction X, the cavity between the inner sill joint 1112 and the outer sill joint 121 gradually inclines towards the top of the vehicle body. The first support plate 1221 and the second support plate 1222 are arranged at intervals along the first direction X. The first support plate 1221 extends towards the top of the vehicle body corresponding to the straight section 1210c, and the second support plate 1222 extends towards the top of the vehicle body corresponding to the inclined section 1210a. The above settings enable the support member 122 to fill the cavity between the inner sill joint 1112 and the outer sill joint 121 to the greatest extent to ensure its support strength. In other embodiments, the first support plate 1221 and the second support plate 1222 may also be arranged at intervals in other directions, such as the third direction Z. The present application does not make any restrictions.

[0038] Since the present application adds a reinforcement component 12 at one end of the door sill body 11 close to the rear wheel housing 20, the reinforcement component 12 has a step portion 1210 higher than the door sill body 11, and the bottom end of the anti-collision beam 30 on the rear door gradually extends toward the connection between the rear wheel housing and the door sill 10, the rear portion of the door sill body 11 is increased by providing the step portion 1210, and the step portion 1210 corresponds to the bottom end of the anti-collision beam 30, thereby increasing the overlap between the bottom end of the anti-collision beam 30 and the door sill 10, so that when the vehicle body structure 100 is hit from the side, such as when it is hit directly against the rear door, the anti-collision beam 30 on the rear door gradually deforms inward. Close to the outer threshold joint 121, until the step portion 1210 of the reinforcement component 12 abuts against the anti-collision beam 30, at this time, the inner side of the support member 122 abuts against the inner threshold 111, supporting the outer threshold joint 121. Since the support member 122 has a high strength, it can reduce the deformation of the outer threshold joint 121. At the same time, the anti-collision beam 30 is resisted by the step portion 1210. Due to the increase in the contact area between the two, the step portion 1210 better disperses the impact force brought by the anti-collision beam 30, so that the outer threshold joint 121 and the anti-collision beam 30 cannot continue to invade the car compartment, thereby ensuring the side stiffness of the car body and ensuring the safety of the car body structure 100.

[0039] The above are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A vehicle body structure, characterized in that: Including door sills, rear wheel covers and anti-collision beams; among them, The door sill includes a door sill body and a reinforcement component, wherein the reinforcement component is connected to the door sill body and the rear wheel cover; along the direction toward the rear wheel cover, the reinforcement component extends toward the top of the vehicle body to form a step portion, and one end of the reinforcement component connected to the rear wheel cover is closer to the top of the vehicle body than the door sill body; The anti-collision beam overlaps with the orthographic projection of the step portion on a reference plane, and the reference plane is perpendicular to a direction in which the anti-collision beam points to the step portion.

2. The vehicle body structure according to claim 1, characterized in that: The reinforcing assembly further includes a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively smoothly connected to opposite ends of the step portion; The first connection portion is connected to the rocker body, and the second connection portion is connected to the rear wheel housing.

3. The vehicle body structure according to claim 2, characterized in that: The step portion includes an inclined section, a straight section and an arc section, and two ends of the arc section are smoothly connected to the inclined section and the straight section respectively; Along the direction toward the rear wheel housing, the inclined section extends obliquely toward the top of the vehicle body; The straight section extends in a direction toward the rear wheel housing; The first connecting portion is connected to the inclined section, and the second connecting portion is connected to the straight section.

4. The vehicle body structure according to claim 2, characterized in that: The threshold body comprises an inner threshold and an outer threshold body connected to each other; The reinforcement assembly includes an outer threshold joint, wherein the first connection portion of the outer threshold joint is connected to a side of the outer threshold body facing the inner threshold; The second connection portion of the outer rocker joint is connected to the rear wheel housing.

5. The vehicle body structure according to claim 4, characterized in that: A cavity is formed between the inner threshold and the outer threshold joint, and the reinforcement assembly further includes a support member disposed in the cavity.

6. The vehicle body structure according to claim 5, characterized in that: One end of the support member is connected to the outer threshold joint, and a gap is formed between the other end of the support member and the inner threshold.

7. The vehicle body structure according to claim 6, characterized in that: The support member includes a first support plate and a second support plate that are spaced apart from each other, and also includes a connecting plate that connects the ends of the first support plate and the second support plate, and one end of the first support plate and the second support plate that is away from the connecting plate is connected to the outer threshold joint.

8. The vehicle body structure according to claim 7, characterized in that: The support member further includes a reinforcing plate, an edge of which is connected to the first supporting plate, the second supporting plate and the inner wall of the connecting plate.

9. The vehicle body structure according to claim 5, characterized in that: The inner sill includes an inner sill body and an inner sill joint, wherein opposite ends of the inner sill joint are respectively connected to the inner sill body and the rear wheel cover, and along the direction toward the rear wheel cover, the inner sill joint extends toward the top of the vehicle body to connect to the rear wheel cover, and the side of the inner sill joint facing the cavity is connected to the outer sill joint.

10. The vehicle body structure according to claim 9, characterized in that: The support member is disposed between the inner sill joint and the outer sill joint.

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