Auxiliary frame and vehicle

Abstract

The utility model discloses an auxiliary frame and a vehicle. The auxiliary frame comprises a longitudinal beam and a transverse beam, the cross beams are connected with the longitudinal beams; the reinforcing plates comprise the first reinforcing plate and the second reinforcing plate, the first reinforcing plate is connected with the longitudinal beam, the second reinforcing plate is connected with the first reinforcing plate and extends towards the cross beam, and the second reinforcing plate is connected with the cross beam. Therefore, the reinforcing plates are connected with the longitudinal beams and the cross beams respectively, connection between the longitudinal beams and the cross beams can be reinforced, the influence of road excitation on welding seams at the lap joint positions of the cross beams and the longitudinal beams is reduced, in addition, the second reinforcing plates extend towards the cross beams, and therefore on one hand, the contact area between the second reinforcing plates and the cross beams can be increased; on the other hand, the edge of the second reinforcing plate can be far away from a welding seam at the lap joint of the cross beam and the longitudinal beam, so that stress concentration on the auxiliary frame can be reduced, and the structural strength of the auxiliary frame can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a subframe and a vehicle. Background Art

[0002] The subframe is a very important safety and load-bearing component in the passenger car chassis. It supports the spring mass of the front and rear axle loads, isolates the vibration of the drive unit, and bears and transmits various forces and torques generated during the driving of the vehicle. Therefore, the strength of the subframe directly affects the driving safety of the vehicle.

[0003] In the prior art, during the driving process of a vehicle, it will experience different road surfaces and be subjected to load excitations in various directions. The overlapping area where the cross beam is connected to the longitudinal beam is relatively small, and the cross beam has a cavity structure inside. Therefore, when subjected to external loads, the lap weld between the cross beam and the longitudinal beam will be subjected to torsional and tensile forces, and it is easy to have the problem of failure. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a subframe with better structural strength.

[0005] The utility model further provides a vehicle.

[0006] The subframe according to the embodiment of the utility model includes longitudinal beams which are longitudinally extended and there are two of them, and the two longitudinal beams are spaced transversely; a cross beam which is transversely extended and both ends are respectively connected to the two longitudinal beams; and reinforcing plates which include a first reinforcing plate and a second reinforcing plate. The first reinforcing plate is connected to the longitudinal beam, the second reinforcing plate is connected to the first reinforcing plate and extends towards the cross beam, and the second reinforcing plate is connected to the cross beam.

[0007] Thus, by providing the reinforcing plates to be respectively connected to the longitudinal beam and the cross beam, the connection between the longitudinal beam and the cross beam can be strengthened to reduce the influence of road surface excitation on the weld at the lap joint of the cross beam and the longitudinal beam. In addition, by arranging the second reinforcing plate to extend towards the cross beam, on the one hand, the contact area between the second reinforcing plate and the cross beam can be increased, and on the other hand, the edge of the second reinforcing plate can be far away from the weld at the lap joint of the cross beam and the longitudinal beam, so as to reduce the stress concentration on the subframe and further improve the structural strength of the subframe.

[0008] According to some embodiments of the utility model, the cross beam includes a front cross beam plate and a rear cross beam plate which are oppositely arranged longitudinally. The front cross beam plate and the rear cross beam plate are connected to each other and form a first connection weld extending transversely. The second reinforcing plate is provided with a first avoidance protrusion which avoids the first connection weld.

[0009] According to some embodiments of the present utility model, the second reinforcing plate includes a first reinforcing plate section, a second reinforcing plate section and a connecting plate section. The first reinforcing plate section and the second reinforcing plate section are longitudinally spaced apart. The first reinforcing plate section and the second reinforcing plate section are respectively connected to the front beam plate and the rear beam plate in a one-to-one correspondence. The connecting plate section is connected between the first reinforcing plate section and the second reinforcing plate section, and a first avoiding protrusion is formed on the connecting plate section.

[0010] According to some embodiments of the present utility model, a second connection weld is formed between the cross beam and the longitudinal beam, and a second avoiding protrusion is formed on the reinforcing plate. The second avoiding protrusion avoids the second connection weld.

[0011] According to some embodiments of the present utility model, the first reinforcing plate includes a main body portion and a connecting portion. The second reinforcing plate is connected to the main body portion. The connecting portion is connected to the main body portion and is longitudinally spaced apart from the second reinforcing plate. A third connection weld is formed between the side of the main body portion transversely away from the second reinforcing plate and the longitudinal beam, and a fourth connection weld is formed between the side of the connecting portion transversely away from the main body portion and the longitudinal beam.

[0012] According to some embodiments of the present utility model, the distance in the transverse direction between the longitudinally extending portion of the third connection weld and the second connection weld is L1, and the distance in the transverse direction between the longitudinally extending portion of the fourth connection weld and the second connection weld is L2. L1 and L2 satisfy the relationship: L1 < L2.

[0013] According to some embodiments of the present utility model, the second reinforcing plate protrudes transversely away from the main body portion relative to the connecting portion.

[0014] According to some embodiments of the present utility model, the subframe further includes a swing arm mounting bracket. The swing arm mounting bracket is disposed on the longitudinal beam and is connected to the reinforcing plate. A fifth connection weld is formed between the swing arm mounting bracket and the reinforcing plate. The fifth connection weld is spaced apart from the second connection weld, the third connection weld and the fourth connection weld respectively.

[0015] According to some embodiments of the present utility model, it is set that the thickness of the reinforcing plate is D, and D satisfies the relationship: 1.5 mm ≤ D ≤ 2.5 mm.

[0016] The vehicle according to the present utility model includes the subframe described above.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0019] Figure 1 is a schematic diagram of a subframe according to an embodiment of the present utility model;

[0020] Figure 2 is a partial schematic diagram of a subframe according to an embodiment of the present utility model.

[0021] Reference numerals:

[0022] 100, subframe;

[0023] 10, longitudinal beam;

[0024] 20, cross beam; 21, cross beam front plate; 22, cross beam rear plate; 23, first connection weld;

[0025] 30, reinforcing plate; 31, first reinforcing plate; 311, main body part; 312, connecting part; 313, third connection weld; 314, fourth connection weld; 32, second reinforcing plate; 321, first reinforcing plate section; 322, second reinforcing plate section; 323, connecting plate section; 3231, first avoidance protrusion; 324, welding hole; 33, second avoidance protrusion;

[0026] 40, swing arm mounting bracket; 51, fifth connection weld. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model will be described in detail below.

[0028] The following figure is referred to Figure 1 - Figure 2 to describe the subframe 100 according to an embodiment of the present utility model. The subframe 100 according to an embodiment of the present utility model can be applied to a vehicle.

[0029] In combination with Figure 1 - Figure 2 as shown, the subframe 100 according to an embodiment of the present utility model mainly includes: a longitudinal beam 10, a cross beam 20, and a reinforcing plate 30. Among them, the longitudinal beam 10 extends longitudinally and there are two longitudinal beams 10 which are spaced apart transversely. The cross beam 20 extends transversely and is connected to the two longitudinal beams 10 at both ends respectively. In this way, the basic structure of the subframe 100 can be formed. The subframe 100 can mainly be used to support the spring mass of the front and rear axle loads, isolate the vibration of the drive unit, and bear and transmit various forces and torques generated during the driving of the vehicle.

[0030] Furthermore, the reinforcing plate 30 includes a first reinforcing plate 31 and a second reinforcing plate 32. The first reinforcing plate 31 is connected to the longitudinal beam 10. The second reinforcing plate 32 is connected to the first reinforcing plate 31 and extends towards the cross beam 20, and the second reinforcing plate 32 is connected to the cross beam 20.

[0031] Specifically, in the embodiment of the present utility model, the reinforcing plate 30 is adapted to be connected to the longitudinal beam 10 and the cross beam 20, and the reinforcing plate 30 is located at the overlapping joint of the cross beam 20 and the longitudinal beam 10. Among them, the first reinforcing plate 31 of the reinforcing plate 30 is connected to the longitudinal beam 10, and the second reinforcing plate 32 is used to be connected to the cross beam 20, so as to ensure that the reinforcing plate 30 is connected to both the longitudinal beam 10 and the cross beam 20. Moreover, the connection between the first reinforcing plate 31 connected to the longitudinal beam 10 and the second reinforcing plate 32 connected to the cross beam 20 enables the reinforcing plate 30 to support both the longitudinal beam 10 and the cross beam 20 at the same time, thereby strengthening the connection strength at the overlapping joint of the longitudinal beam 10 and the cross beam 20.

[0032] Furthermore, the longitudinal beam 10 includes, but is not limited to, a circular tube beam. When the cross beam 20 overlaps with the longitudinal beam 10, it has a C-shaped structure, which makes the overlapping position of the second reinforcing plate 32 and the cross beam 20 correspond to the cavity position inside the cross beam 20, and the structural strength at this place is weak. Therefore, in the embodiment of the present utility model, the second reinforcing plate 32 is extended towards the cross beam 20, so as to increase the contact area between the second reinforcing plate 32 and the cross beam 20.

[0033] With such a setting, on the one hand, the connection reliability between the second reinforcing plate 32 and the cross beam 20 can be improved. On the other hand, the end of the second reinforcing plate 32 far from the longitudinal beam 10 can be further away from the overlapping position of the cross beam 20 and the longitudinal beam 10, so that the weld at the end of the second reinforcing plate 32 far from the longitudinal beam 10 can be further away from the weld at the overlapping position of the cross beam 20 and the longitudinal beam 10, thereby reducing the stress concentration generated at the overlapping position of the cross beam 20 and the longitudinal beam 10, which is beneficial to improving the structural strength of the subframe 100.

[0034] Thus, by adding the reinforcing plate 30 at the overlapping position of the cross beam 20 and the longitudinal beam 10, when the weld at the overlapping joint of the cross beam 20 and the longitudinal beam 10 is subjected to the torsional and pulling forces caused by road surface excitation, the connection strength between the cross beam 20 and the longitudinal beam 10 can be improved, and the failure of the weld at the overlapping joint of the cross beam 20 and the longitudinal beam 10 can be prevented, thereby effectively improving the structural strength of the subframe 100 and being beneficial to improving the safety performance of the whole vehicle.

[0035] Combined with Figure 2As shown, the crossbeam 20 includes a front crossbeam plate 21 and a rear crossbeam plate 22. The front crossbeam plate 21 and the rear crossbeam plate 22 are arranged opposite to each other longitudinally. The front crossbeam plate 21 and the rear crossbeam plate 22 are connected to each other and form a first connecting weld 23 extending transversely. The second reinforcing plate 32 is provided with a first avoiding protrusion 3231, and the first avoiding protrusion 3231 avoids the first connecting weld 23.

[0036] Specifically, in the embodiment of the present utility model, the crossbeam 20 is composed of the front crossbeam plate 21 and the rear crossbeam plate 22 connected opposite to each other longitudinally. This can facilitate the lapping of both the front crossbeam plate 21 and the rear crossbeam plate 22 with the longitudinal beam 10, and can ensure the convenience and reliability of the structural connection of the subframe 100. Both the front crossbeam plate 21 and the rear crossbeam plate 22 extend transversely, and a first connecting weld 23 extending transversely is formed by welding between the front crossbeam plate 21 and the rear crossbeam plate 22. Through the first connecting weld 23, the front crossbeam plate 21 and the rear crossbeam plate 22 can be connected to ensure that the connection strength between the front crossbeam plate 21 and the rear crossbeam plate 22 meets the structural strength requirements of the subframe 100, and further can ensure the safety performance of the whole vehicle.

[0037] Furthermore, the second reinforcing plate 32 is provided with a first avoiding protrusion 3231 to avoid the first connecting weld 23 between the front crossbeam plate 21 and the rear crossbeam plate 22. This can not only prevent the second reinforcing plate 32 from contacting the first connecting weld 23 and prevent the first connecting weld 23 from failing due to excessive stress, but also ensure that the contact surface between the crossbeam 20 and the second reinforcing plate 32 is flat, so as to ensure full contact between the second reinforcing plate 32 and the crossbeam 20 and ensure the connection reliability between the second reinforcing plate 32 and the crossbeam 20.

[0038] Combined Figure 2 As shown, the second reinforcing plate 32 includes a first reinforcing plate section 321, a second reinforcing plate section 322, and a connecting plate section 323. The first reinforcing plate section 321 and the second reinforcing plate section 322 are arranged at intervals longitudinally. The first reinforcing plate section 321 and the second reinforcing plate section 322 are respectively connected to the front crossbeam plate 21 and the rear crossbeam plate 22 in one-to-one correspondence. The connecting plate section 323 is connected between the first reinforcing plate section 321 and the second reinforcing plate section 322, and a first avoiding protrusion 3231 is formed on the connecting plate section 323.

[0039] Specifically, the second reinforcing plate 32 includes a first reinforcing plate section 321 and a second reinforcing plate section 322 arranged at intervals longitudinally. The first reinforcing plate section 321 is connected to one of the front crossbeam plate 21 and the rear crossbeam plate 22 in correspondence, and the second reinforcing plate section 322 is connected to the other of the front crossbeam plate 21 and the rear crossbeam plate 22 in correspondence. This can ensure that both the front crossbeam plate 21 and the rear crossbeam plate 22 are connected to the second reinforcing plate 32.

[0040] Furthermore, a connecting plate section 323 is connected between the first reinforcing plate section 321 and the second reinforcing plate section 322. On the one hand, this can ensure the force transmission between the first reinforcing plate section 321 and the second reinforcing plate section 322, and can reduce the possibility of stress mutation occurring on any one of the first reinforcing plate section 321 and the second reinforcing plate section 322. On the other hand, a first avoiding protrusion 3231 can be provided on the connecting plate section 323 for avoiding the first connecting weld 23 between the front beam plate 21 and the rear beam plate 22. In this way, it can be ensured that both the first reinforcing plate section 321 and the second reinforcing plate section 322 avoid the first connecting weld 23, which is beneficial to improving the structural reliability of the first connecting weld 23 and the connection reliability between the second reinforcing plate 32 and the cross beam 20.

[0041] In an embodiment of the present utility model, both the first reinforcing plate section 321 and the second reinforcing plate section 322 are attached to the cross beam 20, and welding holes 324 are provided on both the first reinforcing plate section 321 and the second reinforcing plate section 322 to facilitate plug welding connection between the first reinforcing plate section 321 and the second reinforcing plate section 322 and the cross beam 20. In this way, the force on the weld formed between the ends of the first reinforcing plate section 321 and the second reinforcing plate section 322 away from the longitudinal beam 10 and the cross beam 20 can be protected, which is beneficial to improving the durability of the weld.

[0042] Combined Figure 2 As shown, a second connecting weld is formed between the cross beam 20 and the longitudinal beam 10, and a second avoiding protrusion 33 is formed on the reinforcing plate 30. The second avoiding protrusion 33 avoids the second connecting weld. With such a setting, when the vehicle is subjected to road surface excitation, the torsional and pulling forces received by the second connecting weld can be reduced, the reinforcing plate 30 can protect the second connecting weld, the situation that the second connecting weld fails due to excessive force can be prevented, the connection reliability between the cross beam 20 and the longitudinal beam 10 can be improved, and thus it is beneficial to enhance the structural strength of the subframe 100.

[0043] Combined Figure 2 As shown, the first reinforcing plate 31 includes a main body portion 311 and a connecting portion 312. The second reinforcing plate 32 is connected to the main body portion 311, the connecting portion 312 is connected to the main body portion 311, and is longitudinally spaced from the second reinforcing plate 32. A third connecting weld 313 is formed between the side of the main body portion 311 horizontally away from the second reinforcing plate 32 and the longitudinal beam 10, and a fourth connecting weld 314 is formed between the side of the connecting portion 312 horizontally away from the main body portion 311 and the longitudinal beam 10.

[0044] Specifically, in the structure of the reinforcing plate 30, the connecting portions 312 of the second reinforcing plate 32 and the first reinforcing plate 31 are all connected to the main body portion 311 of the first reinforcing plate 31 to ensure that the reinforcing plate 30 is an integral whole, which can ensure the structural strength of the reinforcing plate 30. On the main body portion 311, the connecting portion 312 and the second reinforcing plate 32 are arranged at intervals longitudinally. This can not only prevent stress concentration caused by the too-close distance between the connecting portion 312 and the second reinforcing plate 32, but also facilitate the connection of the connecting portion 312 and the second reinforcing plate 32 to the longitudinal beam 10 and the cross beam 20 respectively.

[0045] In the embodiment of the present utility model, the main body portion 311 of the first reinforcing plate 31 is connected to the longitudinal beam 10 by welding, and a third connection weld 313 is formed between the main body portion 311 and the longitudinal beam 10. The third connection weld 313 is arranged on the side of the main body portion 311 away from the second reinforcing plate 32. In this way, the third connection weld 313 can be far away from the second connection weld, which can ensure that the third connection weld 313 and the second connection weld are arranged at intervals transversely. Such an arrangement can prevent the third connection weld 313 from interfering with the second connection weld and ensure the structural reliability of the second connection weld.

[0046] Further, in the embodiment of the present utility model, the position where the connecting portion 312 extends transversely away from the main body portion 311 is welded to the longitudinal beam 10, and a fourth connection weld 314 is formed between the connecting portion 312 and the longitudinal beam 10. The fourth connection weld 314 extends longitudinally, and the fourth connection weld 314 and the third connection weld 313 are far away from each other, which can ensure the connection reliability between the reinforcing plate 30 and the longitudinal beam 10.

[0047] Combined with Figure 2 As shown, the distance between the third connection weld 313 and the longitudinally extending portion of the second connection weld transversely is L1, and the distance between the fourth connection weld 314 and the longitudinally extending portion of the second connection weld transversely is L2. L1 and L2 satisfy the relationship: L1 < L2.

[0048] Specifically, it is set that the distance between the third connection weld 313 and the longitudinally extending portion of the second connection weld transversely is less than the distance between the fourth connection weld 314 and the longitudinally extending portion of the second connection weld transversely. That is, in the embodiment of the present utility model, the fourth connection weld 314 is arranged on the side of the second connection weld transversely away from the third connection weld 313, and the connecting portion 312 extends as much as possible transversely toward the side away from the second connection weld. In this way, the fourth connection weld 314 and the second connection weld can be arranged staggeredly. It should be noted that in the embodiment of the present utility model, both the second connection weld and the fourth connection weld 314 extend longitudinally.

[0049] With such a setting, during the process of the vehicle being excited by the road surface during driving, when the second connection weld is subjected to torsional and tensile forces, the force received by one end of the fourth connection weld 314 close to the second reinforcement plate 32 in the longitudinal direction can be reduced, thereby improving the durability of the fourth connection weld 314 and avoiding premature failure of the fourth connection weld 314.

[0050] Combined with Figure 2 As shown, the second reinforcement plate 32 protrudes transversely away from the main body portion 311 relative to the connection portion 312. With such a setting, the extension range of the second reinforcement plate 32 on the cross beam 20 can be increased, and the contact area between the second reinforcement plate 32 and the cross beam 20 can be increased, thereby improving the connection reliability between the second reinforcement plate 32 and the cross beam 20 and enhancing the protective effect of the reinforcement plate 30 on the second connection weld.

[0051] Combined with Figure 2 As shown, the subframe 100 further includes a swing arm mounting bracket 40. The swing arm mounting bracket 40 is arranged on the longitudinal beam 10 and is connected to the reinforcement plate 30. A fifth connection weld 51 is formed between the swing arm mounting bracket 40 and the reinforcement plate 30. The fifth connection weld 51 is spaced from the second connection weld, the third connection weld 313, and the fourth connection weld 314 respectively.

[0052] Specifically, the swing arm mounting bracket 40 is welded to the reinforcement plate 30, which can enable the reinforcement plate 30 to provide a stable and reliable setting position for the swing arm mounting bracket 40 and ensure the setting reliability of the swing arm mounting bracket 40 in the subframe 100. The fifth connection weld 51 is arranged to be spaced from the second connection weld, the third connection weld 313, and the fourth connection weld 314 respectively, which can prevent the distances between multiple connection welds on the subframe 100 from being too close, facilitating the reduction of stress concentration among multiple connection welds on the subframe 100, and further protecting the second connection weld, the third connection weld 313, the fourth connection weld 314, and the fifth connection weld 51, being beneficial to improving the structural reliability of the second connection weld, the third connection weld 313, the fourth connection weld 314, and the fifth connection weld 51, and further beneficial to enhancing the structural strength of the subframe 100.

[0053] According to an embodiment of the present invention, the thickness of the reinforcement plate 30 is set as D, and D satisfies the relational expression: 1.5 mm ≤ D ≤ 2.5 mm. Specifically, according to an embodiment of the present invention, the thickness of the reinforcement plate 30 is set not less than 1.5 mm, which can prevent the thickness of the reinforcement plate 30 from being too small. If the thickness of the reinforcement plate 30 is too small, the structural strength of the reinforcement plate 30 will be too low to effectively strengthen the connection between the cross beam 20 and the longitudinal beam 10. Therefore, setting the thickness of the reinforcement plate 30 not less than 1.5 mm can ensure that the structural strength of the reinforcement plate 30 meets the structural strength requirements of the subframe 100.

[0054] According to some other embodiments of the present utility model, the thickness of the reinforcing plate 30 is set not to exceed 2.5 mm, which can prevent the thickness of the reinforcing plate 30 from being too large. If the reinforcing plate 30 is too thick, the weight of the subframe 100 will increase, which is not conducive to the lightweight design of the whole vehicle, and further increases the energy consumption of the whole vehicle. Therefore, setting the thickness of the reinforcing plate 30 not to exceed 2.5 mm is beneficial to the lightweight design of the whole vehicle.

[0055] According to still some other embodiments of the present utility model, the thickness of the reinforcing plate 30 is set between 1.5 mm and 2.5 mm, which can not only ensure that the structural strength of the reinforcing plate 30 meets the structural strength requirements of the subframe 100, but also is beneficial to the lightweight design of the whole vehicle.

[0056] According to the embodiment of the present utility model, the vehicle includes the subframe 100 in the embodiment of the present utility model. The subframe 100 of the present utility model is connected to the longitudinal beam 10 and the cross beam 20 respectively by setting the reinforcing plate 30, which can strengthen the connection between the longitudinal beam 10 and the cross beam 20 to reduce the influence of road surface excitation on the weld at the lap joint of the cross beam 20 and the longitudinal beam 10. Among them, the second reinforcing plate 32 is set to extend towards the cross beam 20. On the one hand, this can increase the contact area between the second reinforcing plate 32 and the cross beam 20. On the other hand, it can make the edge of the second reinforcing plate 32 away from the weld at the lap joint of the cross beam 20 and the longitudinal beam 10, thereby reducing the stress concentration on the subframe 100 and further improving the structural strength of the subframe 100.

[0057] In the embodiment of the present utility model, the second reinforcing plate 32 is divided into two reinforcing plate segments, and the two reinforcing plate segments are respectively connected to the front cross beam plate 21 and the rear cross beam plate 22 in one-to-one correspondence to avoid the connection weld between the front cross beam plate 21 and the rear cross beam plate 22. In this way, the stress concentration at the connection between the end of the second reinforcing plate 32 far from the longitudinal beam 10 and the cross beam 20 can be reduced, and the connection reliability between the second reinforcing plate 32 and the cross beam 20 can be ensured.

[0058] In addition, the fourth connection weld 314 formed by the connection between the reinforcing plate 30 and the longitudinal beam 10 and the second connection weld formed between the cross beam 20 and the longitudinal beam 10 are arranged staggeredly in the transverse direction, which can reduce the force at the end of the fourth connection weld 314 close to the second connection weld, and further improve the durability of the fourth connection weld 314.

[0059] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A subframe, characterized in that, Comprising: Longitudinal beams, the longitudinal beams are longitudinally extended and there are two of them, and the two longitudinal beams are arranged at intervals in the transverse direction; Cross beam, the cross beam is transversely extended and both ends are respectively connected to the two longitudinal beams; Reinforcement plate, the reinforcement plate includes a first reinforcement plate and a second reinforcement plate, the first reinforcement plate is connected to the longitudinal beam, the second reinforcement plate is connected to the first reinforcement plate and extends towards the cross beam, and the second reinforcement plate is connected to the cross beam.

2. The subframe according to claim 1, characterized in that, The cross beam includes a front cross beam plate and a rear cross beam plate, the front cross beam plate and the rear cross beam plate are arranged opposite to each other longitudinally, the front cross beam plate and the rear cross beam plate are connected to each other and form a first connecting weld seam extending transversely, the second reinforcement plate is provided with a first avoidance protrusion, and the first avoidance protrusion avoids the first connecting weld seam.

3. The subframe according to claim 2, characterized in that, The second reinforcement plate includes a first reinforcement plate section, a second reinforcement plate section and a connecting plate section, the first reinforcement plate section and the second reinforcement plate section are longitudinally spaced apart, the first reinforcement plate section and the second reinforcement plate section are respectively connected to the front cross beam plate and the rear cross beam plate in one-to-one correspondence, the connecting plate section is connected between the first reinforcement plate section and the second reinforcement plate section, and the first avoidance protrusion is formed on the connecting plate section.

4. The subframe according to claim 3, characterized in that, A second connecting weld seam is formed between the cross beam and the longitudinal beam, a second avoidance protrusion is formed on the reinforcement plate, and the second avoidance protrusion avoids the second connecting weld seam.

5. The subframe according to claim 4, wherein The first reinforcement plate includes a main body part and a connecting part, the second reinforcement plate is connected to the main body part, the connecting part is connected to the main body part and is longitudinally spaced apart from the second reinforcement plate, a third connecting weld seam is formed between the side of the main body part transversely away from the second reinforcement plate and the longitudinal beam, and a fourth connecting weld seam is formed between the side of the connecting part transversely away from the main body part and the longitudinal beam.

6. The subframe according to claim 5, characterized in that, The distance in the transverse direction between the longitudinal extension part of the third connecting weld seam and the second connecting weld seam is L1, the distance in the transverse direction between the longitudinal extension part of the fourth connecting weld seam and the second connecting weld seam is L2, and L1 and L2 satisfy the relation: L1 < L2.

7. The subframe according to claim 5, characterized in that, The second reinforcement plate protrudes transversely away from the main body part relative to the connecting part.

8. The subframe according to claim 5, characterized in that, It further includes a swing arm mounting bracket, the swing arm mounting bracket is arranged on the longitudinal beam and is connected to the reinforcement plate, a fifth connecting weld seam is formed between the swing arm mounting bracket and the reinforcement plate, and the fifth connecting weld seam is spaced apart from the second connecting weld seam, the third connecting weld seam and the fourth connecting weld seam respectively.

9. The subframe according to claim 1, characterized in that, Assuming the thickness of the reinforcement plate is D, D satisfies the relation: 1.5mm ≤ D ≤ 2.5mm.

10. A vehicle, characterized in that, Comprising: The subframe according to any one of claims 1-9.

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