Front subframe, lower vehicle body frame, and vehicle

Abstract

The application provides a front subframe, a lower vehicle body frame and a vehicle. The front subframe comprises a coaming and a mounting structure. The coaming has a first side in a first direction. The mounting structure is arranged on the first side of the coaming. The mounting structure comprises a first mounting beam and two side beams. In the first direction, the first mounting beam is arranged apart from the coaming, and the first mounting beam extends in a second direction. The side beams extend in the first direction. The side beams have first ends and second ends in the first direction. The two ends of the first mounting beam in the second direction are respectively connected with the first ends of the side beams, and the second ends of the side beams are connected with the coaming. The front subframe, the lower vehicle body frame and the vehicle provided by the application can effectively improve the structural strength of the first mounting beam by connecting the two ends of the first mounting beam with the coaming through the side beams. When external force is applied, the two ends of the first mounting beam are not prone to deformation, thereby improving the overall structural strength of the front subframe.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a front subframe, a lower body frame, and a vehicle. Background Technology

[0002] The front subframe is an important component of the lower body frame.

[0003] The existing front subframe mainly consists of two crossbeams spaced apart along the longitudinal direction of the vehicle. In actual use, it has been found that when the vehicle is involved in a collision and subjected to longitudinal forces, the ends of the two crossbeams are prone to deformation, leading to deformation of the front subframe. Summary of the Invention

[0004] The front subframe, lower body frame, and vehicle provided in this application embodiment have good structural strength and are not easily deformed when subjected to external forces.

[0005] This application embodiment provides a front subframe, wherein...

[0006] The front subframe includes a side panel and a mounting structure. The side panel has a first side along a first direction. The mounting structure is disposed on the first side of the side panel. The mounting structure includes a first mounting beam and two side beams. Along the first direction, the first mounting beam is spaced apart from the side panel, and the first mounting beam extends along a second direction. The side beams extend along the first direction and have a first end and a second end in the first direction. The two ends of the first mounting beam in the second direction are respectively connected to the first end of the side beam, and the second end of the side beam is connected to the side panel.

[0007] There is an angle between the first direction and the second direction.

[0008] As described above, the front subframe, wherein the mounting structure further includes a reinforcing beam disposed between the two side beams, the reinforcing beam extending along the first direction, and the reinforcing beam having a first end and a second end in the first direction, the first end of the reinforcing beam being connected to the first mounting beam, and the second end of the reinforcing beam being connected to the side panel.

[0009] As described above, the front subframe has multiple stiffening beams, and each stiffening beam is spaced apart along a second direction.

[0010] As described above, in the front subframe, the first mounting beam is provided with a plurality of first mounting portions, each of which is spaced apart along the second direction.

[0011] As described above, the front subframe, wherein the mounting structure further includes a second mounting beam, the second mounting beam being connected to the side panel and extending along the second direction, and the second end of the reinforcing beam being connected to the side panel through the second mounting beam; the second mounting beam is provided with at least one second mounting portion.

[0012] As described above, the front subframe further includes a wheel arch structure, and the side panel has a second side along the first direction. The second side is disposed opposite to the first side, and the wheel arch structure is disposed on the second side of the side panel. The wheel arch structure, the side panel, and the mounting structure are integrally formed and connected.

[0013] As described above, the front subframe includes two wheel arch assemblies, which are respectively located at both ends of the bulkhead in a second direction.

[0014] As described above, in the front subframe, the wheel arch assembly includes a wheel arch, a third mounting beam, and a support portion. The third mounting beam extends along the first direction, and one end of the third mounting beam is connected to the bulkhead. The wheel arch is connected to one side of the third mounting beam in the third direction. The support portion is connected to the other side of the third mounting beam in the third direction and is connected to the bulkhead.

[0015] The wheel cover has a third mounting part on the side opposite to the third mounting beam, and the support part has a fourth mounting part on the side opposite to the third mounting beam.

[0016] The plane defined by the first direction and the second direction forms an angle with the third direction.

[0017] As described above, in the front subframe, the wheel arch assembly has a first reinforcing structure on the side opposite to the other wheel arch assembly along the second direction, and the first reinforcing structure is fixedly connected to the wheel arch, the third mounting beam and the support portion respectively;

[0018] The first reinforcing structure includes a plurality of reinforcing tubes and a plurality of first reinforcing plates. A plurality of first reinforcing plates are fixedly connected to the periphery of each reinforcing tube, and each first reinforcing plate is fixedly connected to at least one other first reinforcing plate, the wheel cover, the third mounting beam and / or the support portion.

[0019] As described above, the front subframe has a second reinforcing structure on its second side. The second reinforcing structure includes a plurality of second reinforcing plates and a plurality of third reinforcing plates. The plurality of second reinforcing plates are spaced apart along the second direction, and the plurality of third reinforcing plates are spaced apart along the third direction. The plurality of second reinforcing plates and the plurality of third reinforcing plates are intersected and fixedly connected. Each third reinforcing plate is fixedly connected to two wheel arch assemblies on both sides along the second direction.

[0020] The plane defined by the first direction and the second direction forms an angle with the third direction.

[0021] This application embodiment also provides a lower vehicle frame, wherein the lower vehicle frame includes the two sill beams and the front subframe as described above, and the front subframe is connected to the two sill beams on both sides along the second direction.

[0022] As described above, in the lower body frame, the sill beam is provided with a third reinforcing structure on the side away from the front subframe. The third reinforcing structure includes a plurality of fourth reinforcing plates and a plurality of fifth reinforcing plates. The plurality of fourth reinforcing plates are spaced apart along the first direction, and the plurality of fifth reinforcing plates are spaced apart along the third direction. The plurality of fourth reinforcing plates and the plurality of fifth reinforcing plates are intersected and fixedly connected. A reinforcing column is formed at the intersection of each fourth reinforcing plate and each fifth reinforcing plate.

[0023] The plane defined by the first direction and the second direction forms an angle with the third direction.

[0024] This application also provides a vehicle, wherein the vehicle includes a front subframe or lower body frame as described above.

[0025] The front subframe, lower body frame, and vehicle provided in this application embodiment connect the two ends of the first mounting beam to the side panel by setting side beams, which can provide support for the two ends of the first mounting beam, effectively improve the structural strength of the first mounting beam, thereby improving the overall structural strength of the front subframe. When subjected to external force, the force on the two ends of the first mounting beam can be transmitted and dispersed through the two side beams, making the two side beams less prone to deformation. Attached Figure Description

[0026] Figure 1 A three-dimensional structural diagram of the front subframe provided in an embodiment of this application;

[0027] Figure 2 A top view of the front subframe structure provided in an embodiment of this application;

[0028] Figure 3A bottom view of the front subframe provided in an embodiment of this application;

[0029] Figure 4 A schematic diagram of the force path transmission of the front subframe in the installed state, provided for an embodiment of this application;

[0030] Figure 5 for Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0031] Explanation of icon numbers:

[0032] 1. Enclosure panel; 11. Second reinforcing structure; 111. Second reinforcing plate; 112. Third reinforcing plate; 2. Wheel cover structure; 21. Wheel cover assembly; 211. Wheel cover; 2111. Third mounting part; 212. Third mounting beam; 2121. Fifth mounting part; 213. Support part; 2131. Fourth mounting part; 22. First reinforcing structure; 221. Reinforcing tube; 222. First reinforcing plate; 3. Mounting structure; 31. First mounting beam; 311. First mounting part; 32. Side beam; 33. Rib beam; 34. Second mounting beam; 341. Second mounting part; 4. Sill beam; 41. Third reinforcing structure; 411. Fourth reinforcing plate; 412. Fifth reinforcing plate; 413. Reinforcing column;

[0033] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0035] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] like Figures 1 to 3 As shown, this application embodiment provides a front subframe, wherein the front subframe includes a bulkhead 1, a wheel arch structure 2 and a mounting structure 3. The bulkhead 1 has a first side and a second side along a first direction X. The bulkhead 1 is used for assembly and connection with the bulkhead of the subframe of other parts of the vehicle body, and at the same time, the bulkhead 1 provides a base for mounting structure 3.

[0038] The mounting structure 3 is located on the first side of the enclosure 1. The mounting structure 3 includes a first mounting beam 31 and two side beams 32. Along the first direction X, the first mounting beam 31 is spaced apart from the enclosure 1. The first mounting beam 31 is parallel to the first side surface of the enclosure 1 and extends along the second direction Y. The side beams 32 are located between the first mounting beam 31 and the enclosure 1 and extend along the first direction X. The side beams 32 are perpendicular to the first mounting beam 31 and the enclosure 1. The side beams 32 have a first end and a second end in the first direction X. The two ends of the first mounting beam 31 in the second direction Y are respectively connected to the first end of one of the side beams 32, and the second end of the side beam 32 is connected to the enclosure 1. It can be considered that the first mounting beam 31, the two side beams 32, and the enclosure 1 enclose a frame structure. The side beams 32 effectively improve the connection strength between the first mounting beam 31 and the enclosure 1 at both ends in the second direction Y.

[0039] Wherein, the first direction X and the second direction Y are perpendicular to each other, the first direction X is the length direction of the vehicle, and the second direction Y is the width direction of the vehicle.

[0040] like Figure 4 As shown, Figure 4 The direction of the middle arrow indicates the force transmission path of the front subframe after a collision. By setting the side beams 32, the overall structural strength and impact resistance of the front subframe can be improved. After the front subframe is connected to the sill beams 4 of the vehicle body on both sides in the second direction Y, when a collision occurs, the two side beams 32 can share the force of the sill beams 4 in the first direction X, thereby optimizing the force transmission path of the front subframe after a collision and reducing the deformation of the front subframe edges under stress.

[0041] The front subframe provided in this embodiment connects the two ends of the first mounting beam 31 to the side panel via side beams 32. This provides support to both ends of the first mounting beam 31, effectively improving its structural strength and thus enhancing the overall structural strength of the front subframe. When subjected to external forces, the side beams 32 can transmit and disperse the forces acting on the two ends of the first mounting beam 31, making the side beams 32 less prone to deformation. Figures 1 to 4 As shown in the embodiment of this application, the front subframe includes a mounting structure 3 that further comprises a reinforcing beam 33. The reinforcing beam 33 is disposed between the two side beams 32 and between the first mounting beam 31 and the side panel 1. The reinforcing beam 33 extends along a first direction X, that is, the reinforcing beam 33 is parallel to the two side beams 32 and perpendicular to the first mounting beam 31 and the side panel 1. The reinforcing beam 33 has a first end and a second end in the first direction X. The first end of the reinforcing beam 33 is connected to the first mounting beam 31, and the second end of the reinforcing beam 33 is connected to the side panel 1.

[0042] The addition of the stiffening beam 33 can further improve the overall structural strength and impact resistance of the front subframe, share the force of the sill beam 4 and the side beam 32 in the first direction X, further optimize the force transmission path of the front subframe after a collision, and reduce the overall deformation of the front subframe.

[0043] Optionally, such as Figure 2 and Figure 3 As shown in the embodiment of this application, the front subframe has multiple stiffening beams 33, and each stiffening beam 33 is spaced apart along the second direction Y.

[0044] The number of stiffening beams 33 can be flexibly selected as needed to simultaneously meet the weight and strength requirements of the front subframe.

[0045] The front subframe provided in this embodiment has an mounting structure 3 with an upper side and a lower side, wherein... Figure 2 The upper surface of mounting structure 3 can be seen in the image. Figure 3 The lower surface of mounting structure 3 can be seen in the image.

[0046] like Figure 1 and Figure 2 As shown in the embodiment of this application, the front subframe includes a first mounting beam 31 with multiple first mounting portions 311, each spaced apart along the second direction Y. Specifically, each first mounting portion 311 is a seat mounting portion used for mounting a seat.

[0047] Optionally, such as Figure 5As shown, the first mounting part 311 is a protrusion integrally die-cast on the upper side of the first mounting beam 31. The protrusion has a frustum conical structure, a cylindrical structure, a prism structure or a frustum structure. A mounting hole is opened in the center of the protrusion along the third direction Z. The seat is connected to the mounting hole of the protrusion through a connector to install the seat on the first mounting beam 31.

[0048] like Figure 2 and Figure 3 As shown in the embodiment of this application, the front subframe includes a mounting structure 3 that further includes a second mounting beam 34. The second mounting beam 34 is connected to the side panel 1 and extends along the second direction Y. The second end of the reinforcing beam 33 is connected to the side panel 1 through the second mounting beam 34. The provision of the second mounting beam 34 can further improve the structural strength of the mounting structure 3 and the connection strength between the mounting structure 3 and the side panel 1.

[0049] The second mounting beam 34 can also provide a mounting base for other components. Specifically, the lower side of the second mounting beam 34 is integrally die-cast and has at least one second mounting part 341, which is a battery mounting part used to install the seat.

[0050] Optionally, the enclosure 1 has a certain thickness in the first direction X, and the enclosure 1 has an upper side and a lower side in the third direction Z. The second mounting part 341 can also be provided on the lower side of the enclosure 1.

[0051] like Figures 1 to 3 As shown in the embodiment of this application, the front subframe also includes a wheel cover structure 2, which is disposed on the second side of the bulkhead 1. The bulkhead 1, the wheel cover structure 2, and the mounting structure 3 are integrally formed and connected.

[0052] Optionally, the wheel arch structure 2, the bulkhead 1, and the mounting structure 3 are integrally die-cast steel-aluminum structural components. This effectively reduces the need for connectors between components, thereby reducing the use of connectors and lowering connection costs by more than 35%. It also effectively reduces the overall weight of the front subframe, achieving a weight reduction of more than 30% compared to existing front subframes. This promotes lightweight development of the front subframe and the vehicle as a whole, and improves manufacturing efficiency.

[0053] The one-piece die-cast front subframe effectively reduces gaps that may occur during the overlapping of various components. After being assembled with other structures to form the body and vehicle, it effectively improves the sealing of areas related to the front subframe and reduces problems such as water ingress and poor airtightness in the vehicle compartment caused by gaps in the overlapping.

[0054] like Figures 1 to 3As shown in the embodiment of this application, the front subframe includes a wheel arch structure 2 comprising two wheel arch assemblies 21, which are respectively disposed at both ends of the bulkhead 1 in the second direction Y. The two wheel arch assemblies 21 are used to cooperate with the front wheels of the vehicle to achieve sound absorption and vibration reduction, thereby improving the comfort of the occupants.

[0055] Optionally, the wheel cover assembly 21 includes a wheel cover 211, a third mounting beam 212, and a support 213. The wheel cover 211 has an arc-shaped structure to match the circumferential shape of the front wheel of the vehicle. The third mounting beam 212 is used to connect the wheel cover 211 to the bulkhead 1. The support 213 is used to support the third mounting beam 212 and the wheel cover 211.

[0056] The third mounting beam 212 extends along the first direction X, and one end of the third mounting beam 212 is connected to the enclosure 1. The wheel cover 211 is connected to the third mounting beam 212 on the third direction Z side. The support part 213 is connected to the third mounting beam 212 on the other side of the third direction Z and is connected to the enclosure 1.

[0057] Among them, the third direction Z is the vertical direction of the vehicle, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0058] The front subframe provided in this embodiment of the application also has an upper and a lower wheel arch structure 2, wherein... Figure 2 The upper surface of wheel cover 211 can be seen in the image. Figure 3 The support portion 213, the third mounting beam 212, and / or at least part of the lower surface of the support portion 213 can be seen.

[0059] The wheel cover 211 has a third mounting part 2111 on the side opposite to the third mounting beam 212, that is, the wheel cover 211 has a third mounting part 2111 on the upper side. The third mounting part 2111 is a shock absorber mounting part, which is used to realize the installation of the shock absorber.

[0060] A fourth mounting part 2131 is provided on the side of the support part 213 away from the third mounting beam 212, that is, a fourth mounting part 2131 is provided on the lower side of the support part 213. The fourth mounting part 2131 is a subframe mounting part, which is used to realize the connection between the front subframe and other subframes of the vehicle body provided in the embodiment of this application.

[0061] The projection of the support part 213 in the third direction Z coincides only with a portion of the projection of the third mounting beam 212 in the third direction Z. The support part 213 occupies only a portion of the lower surface of the third mounting beam 212. On the lower surface of the third mounting beam 212 other than the area occupied by the support part 213, there is a fifth mounting part 2121. The fifth mounting part 2121 is an upper control arm mounting part, used to realize the connection between the upper control arm of the vehicle body and the front subframe.

[0062] The second mounting part 341, the third mounting part 2111, the fourth mounting part 2131, and the fifth mounting part 2121 can all be protruding structures similar to the first mounting part 311, and are integrally die-cast. Furthermore, the first mounting part 311, the second mounting part 341, the third mounting part 2111, the fourth mounting part 2131, and the fifth mounting part 2121 can also be other forms of mounting structures 3, such as holes, recesses, etc.

[0063] like Figure 1 As shown in the embodiment of this application, the front subframe includes a wheel arch assembly 21 having a first reinforcing structure 22 on the side opposite to the other wheel arch assembly 21 along the second direction Y. The first reinforcing structure 22 is fixedly connected to the wheel arch 211, the third mounting beam 212, and the support portion 213. The first reinforcing structure 22 can effectively improve the structural strength of the wheel arch assembly 21, thereby enhancing its resistance to deformation.

[0064] The first reinforcing structure 22 includes a plurality of reinforcing tubes 221 and a plurality of first reinforcing pieces 222. Each reinforcing tube 221 has a plurality of spaced first reinforcing pieces 222 fixedly connected to its periphery, and each first reinforcing piece 222 is fixedly connected to at least one other first reinforcing piece 222, wheel cover 211, third mounting beam 212 and / or support 213.

[0065] The reinforcing tube 221 is a hollow tubular structure, possessing good structural strength and low weight. It enhances the structural strength of the wheel arch assembly 21 while reducing the impact of the first reinforcing structure 22 on the weight of the wheel arch assembly 21. Multiple first reinforcing pieces 222 are radially connected to the periphery of the reinforcing tube 221 and connect with other first reinforcing pieces 222, other reinforcing tubes 221, the wheel arch 211, the third mounting beam 212, and / or the support portion 213 to form an irregular mesh-like reinforcing structure that can well adapt to the irregular shape of the wheel arch assembly.

[0066] like Figure 1 As shown in the embodiment of this application, the front subframe is provided, wherein the second side of the side panel 1 is provided with a second reinforcing structure 11, which can improve the structural strength of the side panel 1 and thus improve the deformation resistance of the side panel 1.

[0067] The second reinforcing structure 11 includes multiple second reinforcing plates 111 and multiple third reinforcing plates 112. The multiple second reinforcing plates 111 are spaced apart along the second direction Y, and the multiple third reinforcing plates 112 are spaced apart along the third direction Z. The multiple second reinforcing plates 111 and the multiple third reinforcing plates 112 are intersected and fixedly connected. Each third reinforcing plate 112 is fixedly connected to two wheel cover assemblies 21 on both sides along the second direction Y. Since the enclosure 1 is a regular plate structure, the intersection of the second reinforcing plates 111 and the third reinforcing plates 112 forms a regular grid structure to ensure the uniformity of the structural strength of the second reinforcing structure 11, thereby further improving the structural strength of the enclosure 1 at various points.

[0068] This application embodiment also provides a lower body frame, wherein the lower body frame includes two sill beams 4 and a front subframe as described above, and the front subframe is connected to the two sill beams 4 on both sides along the second direction Y.

[0069] like Figure 1 As shown, a third reinforcing structure 41 is provided on the side of the sill beam 4 away from the front subframe. The third reinforcing structure 41 includes multiple fourth reinforcing plates 411 and multiple fifth reinforcing plates 412. The multiple fourth reinforcing plates 411 are spaced apart along the first direction X, and the multiple fifth reinforcing plates 412 are spaced apart along the third direction Z. The multiple fourth reinforcing plates 411 and multiple fifth reinforcing plates 412 are intersected and fixedly connected. Since the enclosure 1 has a regular structure, the fourth reinforcing plates 411 and fifth reinforcing plates 412 intersect to form a regular grid structure to ensure the uniformity of the structural strength of the third reinforcing structure 41, thereby further improving the structural strength of the sill beam 4 at various points.

[0070] Optionally, a reinforcing post 413 is formed at the cross connection between each fourth reinforcing piece 411 and each fifth reinforcing piece 412 to further enhance the structural strength of the third reinforcing structure 41.

[0071] The vehicle frame provided in this application embodiment has a front subframe that connects the two ends of the first mounting beam to the side panel by setting side beams, which can provide support for the two ends of the first mounting beam, effectively improve the structural strength of the first mounting beam, thereby improving the overall structural strength of the front subframe. When subjected to external force, the force on the two ends of the first mounting beam can be transmitted and dispersed through the two side beams, making the two side beams less prone to deformation.

[0072] This application also provides a vehicle, wherein the vehicle includes a front subframe or a lower body frame as described above.

[0073] The vehicle provided in this application embodiment has a front subframe of the vehicle's lower body frame that connects the two ends of the first mounting beam to the side panel by setting side beams. This can provide support for the two ends of the first mounting beam, effectively improving the structural strength of the first mounting beam, thereby improving the overall structural strength of the front subframe. When subjected to external forces, the forces on the two ends of the first mounting beam can be transmitted and dispersed through the two side beams, making the two side beams less prone to deformation.

Claims

1. A front subframe, characterized in that, The front subframe includes a side panel and a mounting structure. The side panel has a first side along a first direction. The mounting structure is disposed on the first side of the side panel. The mounting structure includes a first mounting beam and two side beams. Along the first direction, the first mounting beam is spaced apart from the side panel, and the first mounting beam extends along a second direction. The side beams extend along the first direction and have a first end and a second end in the first direction. The two ends of the first mounting beam in the second direction are respectively connected to the first end of the side beam, and the second end of the side beam is connected to the side panel. The front subframe is connected to the two door sill beams on both sides along the second direction. The first direction is perpendicular to the second direction, the first direction is the length direction of the vehicle where the front subframe is located, and the second direction is the width direction of the vehicle where the front subframe is located.

2. The front subframe as described in claim 1, characterized in that, The installation structure also includes a reinforcing beam, which is disposed between the two side beams. The reinforcing beam extends along the first direction and has a first end and a second end in the first direction. The first end of the reinforcing beam is connected to the first installation beam, and the second end of the reinforcing beam is connected to the enclosure plate.

3. The front subframe as described in claim 2, characterized in that, The reinforcement beams are provided in multiple ways, and each reinforcement beam is spaced apart along the second direction.

4. The front subframe as described in claim 1, characterized in that, The first mounting beam is provided with a plurality of first mounting parts, and each first mounting part is spaced apart along the second direction.

5. The front subframe as described in claim 2, characterized in that, The mounting structure further includes a second mounting beam, which is connected to the enclosure and extends along the second direction. The second end of the reinforcing beam is connected to the enclosure through the second mounting beam. The second mounting beam is provided with at least one second mounting part.

6. The front subframe as described in claim 1, characterized in that, The front subframe also includes a wheel cover structure, and the side panel has a second side along the first direction. The second side is disposed opposite to the first side. The wheel cover structure is disposed on the second side of the side panel. The wheel cover structure, the side panel and the mounting structure are integrally formed and connected.

7. The front subframe as described in claim 6, characterized in that, The wheel cover structure includes two wheel cover assemblies, which are respectively located at both ends of the enclosure in the second direction.

8. The front subframe as described in claim 7, characterized in that, The wheel cover assembly includes a wheel cover, a third mounting beam, and a support portion. The third mounting beam extends along the first direction, and one end of the third mounting beam is connected to the enclosure. The wheel cover is connected to one side of the third mounting beam in the third direction. The support portion is connected to the other side of the third mounting beam in the third direction and is connected to the enclosure. The wheel cover has a third mounting part on the side opposite to the third mounting beam, and the support part has a fourth mounting part on the side opposite to the third mounting beam. The plane defined by the first direction and the second direction is perpendicular to the third direction, which is the vertical direction of the vehicle where the front subframe is located.

9. The front subframe according to claim 8, characterized in that, The wheel cover assembly is provided with a first reinforcing structure on the side opposite to the other wheel cover assembly along the second direction. The first reinforcing structure is fixedly connected to the wheel cover, the third mounting beam and the support portion respectively. The first reinforcing structure includes a plurality of reinforcing tubes and a plurality of first reinforcing plates. A plurality of first reinforcing plates are fixedly connected to the periphery of each reinforcing tube, and each first reinforcing plate is fixedly connected to at least one other first reinforcing plate, the wheel cover, the third mounting beam and / or the support portion.

10. The front subframe according to claim 7, characterized in that, The second side of the enclosure is provided with a second reinforcing structure, which includes a plurality of second reinforcing pieces and a plurality of third reinforcing pieces. The plurality of second reinforcing pieces are spaced apart along the second direction, and the plurality of third reinforcing pieces are spaced apart along the third direction. The plurality of second reinforcing pieces and the plurality of third reinforcing pieces are intersected and fixedly connected. Each third reinforcing piece is fixedly connected to two wheel cover assemblies on both sides along the second direction. The plane defined by the first direction and the second direction forms an angle with the third direction.

11. A lower body frame, characterized in that, The lower body frame includes two sill beams and a front subframe as described in any one of claims 1 to 8, wherein the front subframe is connected to the two sill beams on both sides along the second direction.

12. The undercarriage frame according to claim 11, characterized in that, The sill beam is provided with a third reinforcing structure on the side away from the front subframe. The third reinforcing structure includes a plurality of fourth reinforcing pieces and a plurality of fifth reinforcing pieces. The plurality of fourth reinforcing pieces are spaced apart along the first direction, and the plurality of fifth reinforcing pieces are spaced apart along the third direction. The plurality of fourth reinforcing pieces and the plurality of fifth reinforcing pieces are intersected and fixedly connected. A reinforcing column is formed at the intersection of each fourth reinforcing piece and each fifth reinforcing piece. The plane defined by the first direction and the second direction forms an angle with the third direction.

13. A vehicle, characterized in that, The vehicle includes the underbody frame as described in claim 11 or 12.

Images