Rear auxiliary frame assembly and vehicle

Abstract

The utility model discloses a rear auxiliary frame assembly and a vehicle, the rear auxiliary frame assembly comprises an auxiliary frame body, the auxiliary frame body is a split forming part, the auxiliary frame body comprises a first cross beam, a first longitudinal beam and a second longitudinal beam, the first longitudinal beam and the second longitudinal beam are spaced along the left-right direction of the vehicle, and the first cross beam is connected with the second cross beam. The first cross beam is located between the first longitudinal beam and the second longitudinal beam, and the two ends in the length direction are connected with the first longitudinal beam and the second longitudinal beam correspondingly. And the second cross beam is a split machined part, is located behind the first cross beam and is located between the first longitudinal beam and the second longitudinal beam, and the two ends of the second cross beam in the length direction are connected with the first longitudinal beam and the second longitudinal beam correspondingly. According to the rear auxiliary frame assembly, the compatibility is high, so that the rear auxiliary frame assembly is suitable for chassis of different vehicle types, the modularization and the universality of the rear auxiliary frame assembly are improved, and the development cost and the time cost are effectively reduced.

Description

Technical Field

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

[0002] As an important part of a vehicle, the main function of the rear subframe is to provide support and installation space for the rear suspension system, and at the same time block vibrations and noises during vehicle driving, reduce the noise inside the vehicle compartment, and improve riding comfort. However, the rear subframe is often developed only for one vehicle model or vehicle models of the same platform, and cannot be compatible with vehicle models of different platforms, resulting in high development costs and time costs. Summary of the Utility Model

[0003] 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 rear subframe assembly and a vehicle. The rear subframe assembly has high compatibility, so as to adapt to the chassis of different vehicle models, improve the modularity and universality of the rear subframe assembly, and effectively reduce the development costs and time costs.

[0004] The utility model also provides a vehicle, which includes the above-mentioned rear subframe assembly.

[0005] The rear subframe assembly according to the embodiment of the utility model is used for a vehicle and includes: a subframe body, the subframe body includes a first cross beam, a first longitudinal beam and a second longitudinal beam. The first cross beam, the first longitudinal beam and the second longitudinal beam are separately formed parts. The first longitudinal beam and the second longitudinal beam are spaced apart in the left-right direction of the vehicle. The first cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam; a second cross beam, the second cross beam is a separately processed part. The second cross beam is located behind the first cross beam. The second cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam.

[0006] For the rear subframe assembly according to the embodiment of the utility model, the subframe body includes a first cross beam, a first longitudinal beam and a second longitudinal beam. The first longitudinal beam and the second longitudinal beam are spaced apart in the left-right direction of the vehicle. The first cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam. By separately processing the second cross beam, the second cross beam is located behind the first cross beam. The second cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam, so that the rear subframe assembly has high compatibility, thus adapting to the chassis of different vehicle models, improving the modularity and universality of the rear subframe assembly, and effectively reducing the development costs and time costs.

[0007] In some embodiments of the present utility model, the first longitudinal beam and the second longitudinal beam both include a first body portion, a first connecting portion, and a second connecting portion. The first body portion, the first connecting portion, and the second connecting portion are integrally formed. The first connecting portion and the second connecting portion of the first longitudinal beam are opposite to the first connecting portion and the second connecting portion of the second longitudinal beam and are spaced apart in the left-right direction of the vehicle. The first body portion extends in the front-rear direction of the vehicle. The front end of the first connecting portion is connected to the rear end of the first body portion, and the rear end of the second connecting portion is connected to the front end of the first body portion. In the front-to-rear direction, the first connecting portion of the first longitudinal beam and the first connecting portion of the second longitudinal beam extend in directions away from each other. The two ends in the length direction of the second cross beam are respectively connected to the two first connecting portions, and the two ends in the length direction of the first cross beam are respectively connected to the two second connecting portions.

[0008] In some embodiments of the present utility model, the first connecting portion has a first mounting hole for cooperating with a first bushing. The rear ends of the first longitudinal beam and the second longitudinal beam are connected to the vehicle chassis through the first bushing. The first mounting holes are respectively located at the right rear of the first longitudinal beam and the left rear of the second longitudinal beam.

[0009] In some embodiments of the present utility model, the front end faces of the first longitudinal beam and the second longitudinal beam have first fastening holes, which are optionally used to mount the rear wheel steering mechanism or the toe arm mounting bracket of the vehicle.

[0010] In some embodiments of the present utility model, the upper end face of the second connecting portion has a second fastening hole. When the first fastening hole is used to connect the toe arm mounting bracket, the second fastening hole is used to mount the toe arm mounting bracket.

[0011] In some embodiments of the present utility model, the first cross beam extends in the left-right direction of the vehicle and is connected to the second connecting portions of the first longitudinal beam and the second longitudinal beam.

[0012] In some embodiments of the present utility model, the second connecting portion has a second mounting hole for cooperating with a second bushing. The front ends of the first longitudinal beam and the second longitudinal beam are connected to the vehicle chassis through the second bushing.

[0013] In some embodiments of the present utility model, the subframe body has a third mounting hole for cooperating with a third bushing. The subframe body is connected to the vehicle motor through the third bushing.

[0014] In some embodiments of the present utility model, the third mounting hole includes two first sub-holes and two second sub-holes. The two first sub-holes are respectively embedded in the first longitudinal beam and the second longitudinal beam and are opposite to each other. The two second sub-holes are embedded in the first cross beam and are spaced apart along the length direction of the first cross beam.

[0015] The vehicle according to an embodiment of the present utility model includes the above-mentioned rear subframe assembly.

[0016] For the vehicle according to an embodiment of the present utility model, a rear subframe assembly is provided. The subframe body includes a first cross beam, a first longitudinal beam, and a second longitudinal beam. The first cross beam, the first longitudinal beam, and the second longitudinal beam are all separately formed parts. The first longitudinal beam and the second longitudinal beam are spaced apart in the left-right direction of the vehicle. The first cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam. The second cross beam is processed separately. The second cross beam is located behind the first cross beam. The second cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam, so that the rear subframe assembly has high compatibility, thereby adapting to the chassis of different vehicle models, improving the modularity and versatility of the rear subframe assembly, and effectively reducing the development cost and time cost.

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

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of a rear subframe assembly, rear wheel steering, front vertical arm mounting bracket, rear seat reclining, and spare tire according to an embodiment of the present utility model;

[0020] Figure 2 is a structural diagram of a rear subframe assembly and rear wheel steering according to an embodiment of the present utility model;

[0021] Figure 3 is a structural diagram of a rear subframe assembly and a front vertical arm mounting bracket according to an embodiment of the present utility model;

[0022] Figure 4 is a structural diagram of a rear subframe assembly, a spare tire, and a front vertical arm mounting bracket according to an embodiment of the present utility model;

[0023] Figure 5 is a structural diagram of a rear subframe assembly, rear seat reclining, and front vertical arm mounting bracket according to an embodiment of the present utility model.

[0024] Reference numerals:

[0025] 100, Rear subframe assembly;

[0026] 1, Subframe body; 11, First crossbeam; 1111, Second fastening hole; 1121, Second mounting hole; 12, First longitudinal beam; 121, First body part; 1211, First fastening hole; 122, First connecting part; 1221, First mounting hole; 123, Second connecting part; 13, Second longitudinal beam; 14, Third mounting hole; 1112, Second sub-hole; 1212, First sub-hole;

[0027] 21, Second crossbeam; 22, Second crossbeam';

[0028] 3, Installation space;

[0029] 200, Rear wheel steering mechanism;

[0030] 300, Toe link mounting bracket;

[0031] 400, Rear seat recline;

[0032] 500, Spare tire. Detailed implementation manners

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The rear subframe assembly 100 according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0037] As Figures 1 - 5 shown, the rear subframe assembly 100 according to an embodiment of the present utility model is for a vehicle. The rear subframe assembly 100 includes a subframe body 1 and a second cross member 21. Among them, the subframe body 1 is a split-molded part. The subframe body 1 includes a first cross member 11, a first longitudinal member 12, and a second longitudinal member 13. The first longitudinal member 12 and the second longitudinal member 13 are spaced apart in the left-right direction of the vehicle. The first cross member 11 is located between the first longitudinal member 12 and the second longitudinal member 13, and both ends in the length direction are respectively connected to the first longitudinal member 12 and the second longitudinal member 13. The second cross member 21 and the subframe body 1 are separately processed parts. The second cross member 21 is located behind the first cross member 11. The second cross member 21 is located between the first longitudinal member 12 and the second longitudinal member 13, and both ends in the length direction are respectively connected to the first longitudinal member 12 and the second longitudinal member 13.

[0038] It can be understood that by using the subframe body 1 and the second cross member 21 as separately processed parts, different second cross members 21 can be selected to be connected to the first longitudinal member 12 and the second longitudinal member 13 according to different requirements of the vehicle, so that the rear subframe assembly 100 has high compatibility, thereby adapting to the chassis of different vehicle models and improving the modularity and versatility of the rear subframe assembly 100. For example, as Figure 1 and Figure 5 shown, the second cross member 21 extends in the left-right direction of the vehicle and the middle area is recessed downward to provide space for the rear seat to flip backward 400; or, as Figure 1 and Figure 4 shown, the second cross member '22 extends in the left-right direction of the vehicle and is straight to provide space for the spare tire 500; and, as Figure 1 and Figure 2 shown, by selecting different first cross members 11 and second cross members 21, the installation space 3 can be enlarged or reduced.

[0039] Thus, only one mold opening is required for the first longitudinal beam 12 and the second longitudinal beam 13 of the rear subframe assembly 100 of the present application. The first cross beam 11 and the second cross beam 21 are molded or reworked according to different vehicle requirements. While the rear subframe assembly 100 meets the requirements of different vehicle models, the development cost, time cost, and the process difficulty of the subframe assembly are effectively reduced. Moreover, compared with the prior art, the rear subframe assembly 100 of the present application avoids the waste caused by overall repeated mold opening.

[0040] Meanwhile, since the subframe body 1 provides installation points for structures such as the rear suspension, rods, rear wheel steering mechanism, and motor, and the subframe body 1 is used to connect with the vehicle chassis, through the integral molding of the installation points and the subframe body 1, the structural strength of the subframe body 1 is effectively improved, thereby enhancing the strength, stiffness, and durability of the rear subframe assembly 100, and further improving the overall structural strength of the vehicle applying the rear subframe assembly 100. In addition, by the second cross beam 21 being located between the first longitudinal beam 12 and the second longitudinal beam 13 and the two ends in the length direction being respectively connected to the first longitudinal beam 12 and the second longitudinal beam 13, the second cross beam 21 and the subframe body 1 are surrounded in a ring shape, further enhancing the strength of the rear subframe assembly 100.

[0041] Furthermore, the subframe body 1 is manufactured by a hollow cast aluminum process, and the second cross beam 21 is manufactured by a hollow cast aluminum process. Thus, the subframe body 1 and the second cross beam 21 manufactured by the hollow cast aluminum process have significant benefits such as remarkable lightweight, strength improvement, performance optimization, and cost - effectiveness.

[0042] According to the rear subframe assembly 100 of the embodiment of the present utility model, the subframe body 1 includes a first cross beam 11, a first longitudinal beam 12, and a second longitudinal beam 13. The first longitudinal beam 12, the first longitudinal beam 12, and the second longitudinal beam 13 are all separately formed parts. The first longitudinal beam 12 and the second longitudinal beam 13 are spaced apart in the left - right direction of the vehicle. The first cross beam 11 is located between the first longitudinal beam 12 and the second longitudinal beam 13 and the two ends in the length direction are respectively connected to the first longitudinal beam 12 and the second longitudinal beam 13. By the second cross beam 21 and the subframe body 1 being separately processed parts, the rear subframe assembly 100 has high compatibility, thereby adapting to the chassis of different vehicle models, improving the modularity and versatility of the rear subframe assembly 100, and effectively reducing the development cost and time cost. At the same time, the second cross beam 21 is located between the first longitudinal beam 12 and the second longitudinal beam 13 and the two ends in the length direction are respectively connected to the first longitudinal beam 12 and the second longitudinal beam 13, effectively enhancing the strength of the rear subframe assembly 100.

[0043] In some embodiments of the present utility model, such as Figures 1 - 5As shown, the first longitudinal beam 12 and the second longitudinal beam 13 both include a first body portion 121, a first connection portion 122, and a second connection portion 123. The first body portion 121, the first connection portion 122, and the second connection portion 123 are integrally formed. The second connection portions 123 of the first longitudinal beam 12 and the second longitudinal beam 13 face each other and are spaced apart in the left-right direction of the vehicle. The first body portion 121 extends in the front-rear direction of the vehicle. The front end of the first connection portion 122 is connected to the rear end of the first body portion 121, and the rear end of the second connection portion 123 is connected to the front end of the first body portion 121. In the front-to-rear direction, the first connection portions 122 of the first longitudinal beam 12 and the second longitudinal beam 13 extend in directions away from each other. The two ends in the length direction of the second cross beam 21 are respectively connected to the two first connection portions 122, and the two ends in the length direction of the first cross beam 11 are respectively connected to the two second connection portions 123.

[0044] It can be understood that the second cross beam 21 and the subframe body 1 surround and form an installation space 3. By respectively connecting the two ends in the length direction of the second cross beam 21 to the two first connection portions 122, and respectively connecting the two ends in the length direction of the first cross beam 11 to the two second connection portions 123, the area of the installation space 3 can be effectively adjusted, facilitating the arrangement of the components located in the installation space 3. Specifically, when the rear subframe assembly 100 is applied to an electric vehicle, the motor is located in the installation space 3. Through such a setting, the rear subframe assembly 100 can simultaneously meet the installation requirements of multiple motors, having high versatility.

[0045] In some embodiments of the present utility model, as Figures 1 - 5 shown, the first connection portion 122 has a first mounting hole 1221 for cooperating with a first bushing. The rear ends of the first longitudinal beam 12 and the second longitudinal beam 13 are connected to the vehicle chassis through the first bushing. The first mounting holes 1221 are respectively located at the right rear of the first longitudinal beam 12 and the left rear of the second longitudinal beam 13. Thus, the connection between the first longitudinal beam 12 and the second longitudinal beam 13 and the vehicle chassis is realized through the first bushing in the first mounting hole 1221, thereby realizing the connection between the rear subframe assembly 100 and the chassis. At the same time, the vibration and noise transmitted from the road surface to the vehicle body are effectively reduced through the first bushing, greatly improving the riding comfort of passengers.

[0046] In some embodiments of the present utility model, as Figures 1 - 5As shown, the front end faces of the first longitudinal beam 12 and the second longitudinal beam 13 have first fastening holes 1211, and the first fastening holes 1211 are optionally used to install the rear-wheel steering mechanism 200 or the toe arm mounting bracket 300 of the vehicle. Thus, through such a setting, the rear subframe assembly 100 of the present application realizes the sharing of the rear-wheel steering mechanism 200 or the toe arm, so as to adapt to the chassis of different vehicle models and improve the modularity and versatility of the rear subframe assembly 100. At the same time, the rear-wheel steering mechanism 200 or the toe arm mounting bracket 300 for installing the toe arm shares the first fastening holes 1211, and the sharing of the rear-wheel steering mechanism 200 or the toe arm is realized by removing the fasteners located in the first fastening holes 1211, further improving the versatility of the rear subframe assembly 100. Specifically, the first fastening holes 1211 are located on the front end faces of the first body portion 121 of the first longitudinal beam 12 and the first body portion 121 of the second longitudinal beam 13.

[0047] Furthermore, the first fastening holes 1211 are one or a plurality spaced apart in the up-down direction. Thus, through such a setting, the versatility of the rear subframe assembly 100 is further improved, so as to adapt to various models of rear-wheel steering mechanisms 200 or toe arm mounting brackets 300.

[0048] In some embodiments of the present invention, as Figures 1 - 5 shown, the upper end face of the second connecting portion 123 has second fastening holes 1111. When the first fastening holes 1211 are used to connect the toe arm mounting bracket 300, the second fastening holes 1111 are used to install the toe arm mounting bracket 300. Thus, when the rear subframe assembly 100 is used to install the toe arm, the first fastening holes 1211 and the second fastening holes 1111 are respectively used to connect the toe arm mounting bracket 300, thereby further improving the connection strength between the toe arm mounting bracket 300 and the rear subframe assembly 100, and further ensuring the connection strength between the toe arm and the rear subframe assembly 100 and improving the overall reliability.

[0049] In some embodiments of the present invention, as Figures 1 - 5 shown, the first cross beam 11 extends in the left-right direction of the vehicle and is connected to the second connecting portions 123 of the first longitudinal beam 12 and the second longitudinal beam 13. Thus, the structural strength of the subframe body 1 is effectively ensured, and the pressure transmitted from the first longitudinal beam 12 or the second longitudinal beam 13 to the first cross beam 11 is effectively divided, ensuring the strength of the two second connecting portions 123, and thus ensuring the overall reliability of the rear subframe assembly 100.

[0050] In some embodiments of the present invention, as Figures 1 - 5As shown, the second connecting portion 123 has a second mounting hole 1121 that mates with the second bushing. The front ends of the first longitudinal beam 12 and the second longitudinal beam 13 are connected to the vehicle chassis through the second bushing. Thus, the first longitudinal beam 12 and the second longitudinal beam 13 are connected to the vehicle chassis through the second bushing located in the second mounting hole 1121, thereby realizing the connection of the rear subframe assembly 100 to the chassis. At the same time, the vibration and noise transmitted from the road surface to the vehicle body are effectively reduced through the second bushing, greatly improving the riding comfort of passengers.

[0051] In some embodiments of the present invention, as Figures 1 - 5 shown, the subframe body 1 has a third mounting hole 14 that mates with the third bushing. The subframe body 1 is connected to the vehicle motor through the third bushing.

[0052] It can be understood that the subframe body 1 and the second crossbeam 21 jointly define an installation space 3 for accommodating the motor. Thus, the subframe body 1 is connected to the motor through the third bushing located in the third mounting hole 14, thereby meeting the installation requirements of the rear subframe assembly 100 for the motor. At the same time, the vibration and noise transmitted from the motor to the vehicle body are effectively reduced through the third bushing, greatly improving the riding comfort of passengers. In addition, by embedding the third bushing in the subframe body 1, the strength, stiffness, and durability of the rear subframe assembly 100 are maximally improved.

[0053] In some embodiments of the present invention, as Figures 1 - 5 shown, the third mounting hole 14 includes two first sub-holes 1212 and two second sub-holes 1112. The two first sub-holes 1212 are respectively embedded in the first longitudinal beam 12 and the second longitudinal beam 13 and are opposite to each other, and the two second sub-holes 1112 are embedded in the first crossbeam 11 and are spaced apart along the length direction of the first crossbeam 11.

[0054] Thus, the connection between the first longitudinal beam 12 and the second longitudinal beam 13 and the motor is realized through the two first sub-holes 1212, and the connection between the first crossbeam 11 and the motor is realized through the two second sub-holes 1112, thereby realizing the connection between the subframe body 1 and the motor, ensuring the installation strength of the motor in the front-back direction and left-right direction of the vehicle, and improving the reliability of the rear subframe assembly 100.

[0055] Specifically, the two first sub-holes 1212 are respectively located on the first body portion 121 of the first longitudinal beam 12 and the first body portion 121 of the second longitudinal beam 13, and the two second sub-holes 1112 are located on the first crossbeam 11.

[0056] The vehicle according to the embodiments of the present invention will be described below.

[0057] The vehicle according to the embodiments of the present invention includes a rear subframe assembly 100.

[0058] A vehicle according to an embodiment of the present utility model is provided with a rear subframe assembly 100. The subframe body 1 includes a first cross beam 11, a first longitudinal beam 12, and a second longitudinal beam 13. The first longitudinal beam 12, the first longitudinal beam 12, and the second longitudinal beam 13 are all separately formed parts. The first longitudinal beam 12 and the second longitudinal beam 13 are spaced apart in the left-right direction of the vehicle. The first cross beam 11 is located between the first longitudinal beam 12 and the second longitudinal beam 13, and both ends in the length direction are respectively connected to the first longitudinal beam 12 and the second longitudinal beam 13. Since the second cross beam 21 and the subframe body 1 are separately processed parts, the rear subframe assembly 100 has high compatibility, so as to adapt to the chassis of different vehicle models, improve the modularity and versatility of the rear subframe assembly 100, and effectively reduce the development cost and time cost. At the same time, the second cross beam 21 is located between the first longitudinal beam 12 and the second longitudinal beam 13, and both ends in the length direction are respectively connected to the first longitudinal beam 12 and the second longitudinal beam 13, effectively improving the strength of the vehicle.

[0059] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0060] Although the embodiments of the present utility model 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 spirits of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A rear subframe assembly for a vehicle, characterized in that: include: A subframe body, the subframe body comprising a first cross beam, a first longitudinal beam, and a second longitudinal beam, the first cross beam, the first longitudinal beam, and the second longitudinal beam are all split molded parts, the first longitudinal beam and the second longitudinal beam are spaced apart in the left-right direction of the vehicle, the first cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends of the first cross beam in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam; The second cross beam is a split processed part, the second cross beam is located behind the first cross beam, the second cross beam is located between the first longitudinal beam and the second longitudinal beam, and both ends of the second cross beam in the length direction are respectively connected to the first longitudinal beam and the second longitudinal beam.

2. The rear subframe assembly according to claim 1, characterized in that: The first longitudinal beam and the second longitudinal beam each include a first main body portion, a first connecting portion and a second connecting portion, the first main body portion, the first connecting portion and the second connecting portion being an integrally formed part, the first connecting portion and the second connecting portion of the first longitudinal beam being opposite to the first connecting portion and the second connecting portion of the second longitudinal beam and being spaced apart along the left-right direction of the vehicle, the first main body portion extending along the front-to-back direction of the vehicle, the front end of the first connecting portion being connected to the rear end of the first main body portion, the rear end of the second connecting portion being connected to the front end of the first main body portion, and in the direction from front to back, the first connecting portion of the first longitudinal beam and the first connecting portion of the second longitudinal beam extending in directions away from each other, the two ends of the second cross beam in the length direction are respectively connected to the two first connecting portions, and the two ends of the first cross beam in the length direction are respectively connected to the two second connecting portions.

3. The rear subframe assembly according to claim 2, characterized in that: The first connecting portion has a first mounting hole that cooperates with a first bushing. The rear ends of the first longitudinal beam and the second longitudinal beam are connected to the chassis of the vehicle through the first bushing. The first mounting holes are respectively located at the right rear of the first longitudinal beam and the left rear of the second longitudinal beam.

4. The rear subframe assembly according to claim 2, characterized in that: The front end surfaces of the first longitudinal beam and the second longitudinal beam have first fastening holes, and the first fastening holes are optionally used to install the rear wheel steering mechanism or the front toe arm mounting bracket of the vehicle.

5. The rear subframe assembly according to claim 4, characterized in that: The upper end surface of the second connecting portion has a second fastening hole. When the first fastening hole is used to connect the front toe arm mounting bracket, the second fastening hole is used to install the front toe arm mounting bracket.

6. The rear subframe assembly according to claim 2, characterized in that: The first cross member extends in the left-right direction of the vehicle and is connected to the second connection portion of the first longitudinal member and the second longitudinal member.

7. The rear subframe assembly according to claim 6, characterized in that: The second connecting portion has a second mounting hole matched with a second bushing, and the front end of the first longitudinal beam and the front end of the second longitudinal beam are connected to the chassis of the vehicle through the second bushing.

8. The rear subframe assembly according to claim 1, characterized in that: The sub-frame body has a third mounting hole matched with a third bushing, and the sub-frame body is connected to the motor of the vehicle through the third bushing.

9. The rear subframe assembly according to claim 8, characterized in that: The third mounting hole includes two first sub-holes and two second sub-holes, the two first sub-holes are respectively embedded in the first longitudinal beam and the second longitudinal beam and are opposite to each other, and the two second sub-holes are embedded in the first cross beam and are spaced apart along the length direction of the first cross beam.

10. A vehicle, characterized in that: It comprises a rear subframe assembly according to any one of claims 1-9.

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