Subframe and vehicle

Abstract

A subframe, comprising cross beams (1) and longitudinal beams (2), wherein two cross beams are arranged opposite to each other, vehicle body connecting portions (11) are provided at two ends of each cross beam, two longitudinal beams are arranged between the two cross beams, two ends of each longitudinal beam are respectively connected to the two cross beams, the two cross beams and the two longitudinal beams enclose a frame-shaped structure configured for the mounting of an electric drive motor, reinforcing structures (3) are provided at connections between the cross beams and the longitudinal beams, the connections have a high dynamic stiffness, and vibration noise can be effectively absorbed, thereby reducing vibration noise transmitted to the vehicle body connecting portions or to a vehicle body. In addition, the present application further relates to a vehicle.

Description

A subframe and vehicle Cross-references to related applications

[0001] This disclosure claims priority to Chinese patent application No. 202520188033.7, filed on February 6, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to, but is not limited to, the field of vehicle components; more specifically, it relates to a subframe and a vehicle. Background Technology

[0003] The subframe is a key component in the chassis of an electric vehicle, providing mounting points for components such as the drive motor and the vehicle's suspension system, so as to transmit the forces of the drive motor and suspension system to the vehicle body. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0005] On one hand, this disclosure provides a subframe including at least two crossbeams and at least two longitudinal beams. The at least two crossbeams are arranged opposite each other, and each crossbeam has a body connecting portion at both ends. The at least two longitudinal beams are arranged between the at least two crossbeams, and each longitudinal beam is connected to the at least two crossbeams at both ends. The at least two crossbeams and the at least two longitudinal beams enclose a frame structure, which is configured to mount a drive motor. Each connection between the crossbeam and the longitudinal beam is provided with a reinforcing structure.

[0006] In some embodiments, the interiors of at least two of the crossbeams and at least two of the longitudinal beams are hollow, and the at least two of the crossbeams and at least two of the longitudinal beams are an integral structure.

[0007] In some embodiments, the reinforcing structure includes protrusions formed on the inner walls of the crossbeams and the longitudinal beams.

[0008] In some embodiments, at least one of the beams has a first reinforcing rib inside.

[0009] In some embodiments, at least one of the longitudinal beams is provided with a second reinforcing rib inside.

[0010] In some embodiments, the vehicle body connection portion includes a connecting sleeve, and the outer peripheral wall of the connecting sleeve is provided with a third reinforcing rib.

[0011] In some embodiments, the third reinforcing rib includes an arc-shaped protrusion and a plurality of reinforcing teeth. The arc-shaped protrusion extends circumferentially along the connecting sleeve, and the plurality of reinforcing teeth are respectively disposed on both sides of the arc-shaped protrusion and arranged at intervals along the circumferential direction of the connecting sleeve.

[0012] In some embodiments, at least two of the longitudinal beams are spaced apart along the width direction of the vehicle, and each of the at least two longitudinal beams is provided with a through hole for the corresponding wheel axle to pass through, and each longitudinal beam is provided with a fourth reinforcing rib along the circumference of the corresponding through hole.

[0013] In some embodiments, at least two of the crossbeams are spaced apart along the length of the vehicle, and the bottom of each crossbeam is recessed toward the top of the vehicle to form a clearance space for the exhaust pipe to pass through, and the clearance spaces of the at least two crossbeams are correspondingly provided.

[0014] In some embodiments, at least two of the crossbeams are a front crossbeam and a rear crossbeam, the front crossbeam having a first mounting hole and a second mounting hole configured for mounting the drive motor, one of the at least two longitudinal beams having a third mounting hole configured for mounting the drive motor at one end near the rear crossbeam, and the other of the at least two longitudinal beams having a fourth mounting hole configured for mounting the drive motor at one end near the rear crossbeam.

[0015] In some embodiments, the axes of the first and second mounting holes are parallel to the length direction of the vehicle, and the axes of the third and fourth mounting holes are parallel to the width direction of the vehicle.

[0016] In some embodiments, the longitudinal beam is raised toward the upper part of the vehicle such that the dimension of the longitudinal beam along the height direction of the vehicle is greater than the dimension of the crossbeam along the height direction of the vehicle, and the third or fourth suspension mounting hole is disposed at the middle of the corresponding longitudinal beam in the height direction of the vehicle.

[0017] In some embodiments, each of the longitudinal beams is provided with a first control arm mounting hole, a second control arm mounting hole and a toe bar mounting hole configured for mounting the suspension system of the vehicle, and a first sand leakage hole configured for discharging sand core residue during the subframe forming process.

[0018] In some embodiments, each of the crossbeams is provided with a second sand-draining hole configured to discharge sand core residues during the subframe forming process.

[0019] On the other hand, embodiments of this disclosure provide a vehicle including the aforementioned subframe.

[0020] The subframe and vehicle of this disclosure embodiment include at least two crossbeams arranged opposite each other, with each crossbeam having a body connecting portion at both ends. The crossbeams can be connected to the vehicle body via the body connecting portions, thereby enabling the subframe to be mounted on the vehicle body. Simultaneously, at least two longitudinal beams are provided between the at least two oppositely arranged crossbeams, with each longitudinal beam connecting to at least two crossbeams at both ends. Specifically, at least two longitudinal beams are connected along one end at the front of the vehicle to the portion of one of the crossbeams excluding the body connecting portions at both ends, and at least two longitudinal beams are connected along one end at the rear of the vehicle to the portion of another crossbeam excluding the body connecting portions at both ends, thus forming a frame structure. The frame structure is used to mount a drive motor, i.e., the drive motor is connected to the crossbeams and / or longitudinal beams. When the drive motor is excited by the road surface, the vibration and noise generated will be transmitted to the crossbeams and / or longitudinal beams. The connection between each crossbeam and longitudinal beam is equipped with a reinforced structure, that is, the dynamic stiffness of the connection is high, which can effectively absorb the vibration and noise, so that the vibration and noise transmitted to the body connection or body is less, that is, reduce the VTF (Vibration Transfer Function), thereby improving the NVH (Noise, Vibration, and Harshness) performance of the subframe and ensuring the ride comfort of the passengers in the passenger compartment.

[0021] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood. Attached Figure Description

[0022] The accompanying drawings are included to provide a further understanding of the technical solutions of this disclosure, are incorporated in the specification and constitute a part of this disclosure, illustrate embodiments consistent with this disclosure, and are used together with the specification to explain the principles of this disclosure, but do not constitute a limitation on the technical solutions of this disclosure.

[0023] Figure 1 is a structural schematic diagram of the subframe according to an embodiment of this disclosure.

[0024] Figure 2 is a structural schematic diagram of the subframe from another perspective of an embodiment of this disclosure.

[0025] Figure 3 is a structural schematic diagram of the subframe from another perspective of an embodiment of this disclosure.

[0026] Figure 4 is a partial cross-sectional view of the subframe according to an embodiment of this disclosure.

[0027] Figure 5 is a partial cross-sectional view of the subframe from another perspective of an embodiment of this disclosure.

[0028] Figure 6 is a partial cross-sectional view of the subframe of an embodiment of this disclosure from another perspective.

[0029] Figure 7 is an enlarged schematic diagram of point A in Figure 1.

[0030] Explanation of reference numerals in the attached drawings: 1. Crossbeam; 11. Body connection part; 111. Connecting sleeve; 112. Third reinforcing rib; 1121. Arc-shaped protrusion; 1122. Reinforcing tooth; 12. First reinforcing rib; 13. Clearance space; 14. First suspension mounting hole; 15. Second suspension mounting hole; 16. Second sand leakage hole; 2. Longitudinal beam; 21. Second reinforcing rib; 22. Through hole; 23. Fourth reinforcing rib; 24. Third suspension mounting hole; 25. Fourth suspension mounting hole; 26. First control arm mounting hole; 27. Second control arm mounting hole; 28. Front toe-in mounting hole; 29. ​​First sand leakage hole; 3. Reinforcing structure. Detailed Implementation

[0031] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Although some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0032] In the description of this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fitting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0033] In addition, it should be noted that in the description of this disclosure, the terms and nouns in the various embodiments, such as "upper," "lower," "front," and "rear," which indicate the location, are only used to simplify the description of the positional relationship based on the accompanying drawings and do not mean that the components and devices referred to must be operated in accordance with the specific location and limited operation, method, and structure in the specification. Such directional terms do not constitute a limitation of this disclosure.

[0034] This document establishes an XYZ coordinate system, where the X-axis represents the vehicle's length direction (e.g., front-to-back direction), with the positive X-axis representing the front of the vehicle and the negative X-axis representing the rear of the vehicle; the Y-axis represents the vehicle's width direction (e.g., left-to-right direction), with the positive Y-axis representing the left side of the vehicle and the negative Y-axis representing the right side of the vehicle; and the Z-axis represents the vehicle's height direction (e.g., up-down / vertical direction), with the positive Z-axis representing the top of the vehicle and the negative Z-axis representing the bottom of the vehicle. It should be noted that the aforementioned X, Y, and Z-axis representations are for ease of description and simplification of this disclosure only, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0035] As mentioned earlier, the subframe is a key component of an electric vehicle chassis, providing mounting points for components such as the drive motor and suspension system to transmit forces from these systems to the vehicle body. However, current subframes have poor NVH performance, making it easy for vibration noise generated by the drive motor due to road surface excitation to be transmitted to the vehicle body through the subframe during vehicle operation, resulting in a poor experience for passengers in the passenger compartment.

[0036] In view of this, at least one embodiment of the present disclosure provides a subframe and a vehicle.

[0037] As shown in Figures 1 to 4, the subframe includes at least two crossbeams 1 and at least two longitudinal beams 2. The at least two crossbeams 1 are arranged opposite each other, and each crossbeam 1 has a body connecting part 11 at both ends. The at least two longitudinal beams 2 are arranged between the at least two crossbeams 1, and each longitudinal beam 2 is connected to the at least two crossbeams 1 at both ends. The at least two crossbeams 1 and the at least two longitudinal beams 2 enclose a frame structure, which is used to install the drive motor. Each connection between the crossbeam 1 and the longitudinal beam 2 is provided with a reinforcing structure 3.

[0038] The subframe of this embodiment can be used as the rear subframe of an electric vehicle and can be made of aluminum, making it lightweight. The crossbeam 1 extends generally along the Y-direction, and body connecting portions 11 are respectively provided at both ends of the crossbeam 1 in the Y-direction (i.e., the left and right ends) for connection to the vehicle body. At least two crossbeams 1 are spaced apart along the X-direction. The longitudinal beams 2 extend generally along the X-direction, and at least two longitudinal beams 2 are spaced apart along the Y-direction.

[0039] In this embodiment, at least two crossbeams 1 of the subframe are arranged opposite each other, and each crossbeam 1 has a body connecting portion 11 at both ends. The crossbeam 1 can be connected to the body through the body connecting portion 11, thereby realizing the installation of the subframe on the body. Simultaneously, at least two longitudinal beams 2 are provided between the at least two oppositely arranged crossbeams 1, and each longitudinal beam 2 is connected to at least two crossbeams 1 at both ends. Specifically, one end of at least two longitudinal beams 2 along the positive X-axis is connected to the portion of one of the crossbeams 1 excluding the body connecting portions 11 at both ends, and one end of at least two longitudinal beams 2 along the negative X-axis is connected to the portion of the other crossbeam 1 excluding the body connecting portions 11 at both ends, thus forming a frame structure. The frame structure is used to install the drive motor, that is, the drive motor is connected to the crossbeam 1 and / or the longitudinal beam 2. When the drive motor is excited by the road surface, the vibration noise generated will be transmitted to the crossbeam 1 and / or the longitudinal beam 2. The connection between each crossbeam 1 and the longitudinal beam 2 is provided with a reinforcing structure 3, that is, the dynamic stiffness of the connection is high, which can effectively absorb the vibration noise, so that the vibration noise transmitted to the body connection part 11 or the body is smaller, that is, the VTF is reduced, thereby improving the NVH performance of the subframe and ensuring the ride comfort of the passengers in the passenger compartment.

[0040] In the following description, for ease of description, an example of a subframe comprising two crossbeams 1 and two longitudinal beams 2 will be used. However, those skilled in the art will understand that the number of crossbeams 1 and longitudinal beams 2 may be two or more, and this disclosure does not limit this.

[0041] In some embodiments, the interiors of both crossbeams 1 and both longitudinal beams 2 are hollow, and the two crossbeams 1 and two longitudinal beams 2 are an integral structure. The hollow interiors of the crossbeams 1 and longitudinal beams 2 reduce material usage and facilitate the lightweighting of the subframe. Compared to a subframe constructed by welding the two crossbeams 1 and two longitudinal beams 2 together, the integral structure, such as through die casting, eliminates the need for welding, simplifies the forming process, eliminates weld seams, and results in higher overall rigidity and better force transmission stability.

[0042] As shown in Figures 4 to 6, in some embodiments, the reinforcing structure 3 includes protrusions formed on the inner walls of the crossbeam 1 and the longitudinal beam 2; and / or, at least one crossbeam 1 has a first reinforcing rib 12 inside; and / or, at least one longitudinal beam 2 has a second reinforcing rib 21 inside.

[0043] In this embodiment, the reinforcing structure 3 is a reinforcing rib formed by protrusions on the inner wall of the connection between the crossbeam 1 and the longitudinal beam 2. The first reinforcing rib 12 is a reinforcing rib formed by protrusions on the inner wall of the crossbeam 1, excluding the connection between the crossbeam 1 and the longitudinal beam 2. The second reinforcing rib 21 is a reinforcing rib formed by protrusions on the inner wall of the longitudinal beam 2, excluding the connection between the crossbeam 1 and the longitudinal beam 2. The reinforcing structure 3, the first reinforcing rib 12, the second reinforcing rib 21, the crossbeam 1, and the longitudinal beam 2 are integrally formed, which is simple to form and has high strength. In addition, the reinforcing structure 3, the first reinforcing rib 12, and the second reinforcing rib 21 are located inside the crossbeam 1 and the longitudinal beam 2. Under the premise of improving the strength of the subframe, it will not increase the space occupied by the subframe and will not interfere with the arrangement of related equipment around the subframe.

[0044] In some embodiments, the first reinforcing rib 12 may be provided inside both crossbeams 1, or it may be provided only inside one of the crossbeams 1. The first reinforcing rib 12 can be used to enhance the dynamic stiffness of the crossbeam 1. The first reinforcing rib 12 may be provided close to the body connection portion 11, or located between the drive motor mounting point (hereinafter referred to as the suspension mounting hole) on the crossbeam 1 and the body connection portion 11, so that the vibration noise at the drive motor mounting point on the crossbeam 1 can be attenuated during the transmission to the body connection portion 11, thereby improving the NVH performance of the subframe. The first reinforcing rib 12 may be straight, L-shaped, etc., and multiple first reinforcing ribs 12 may be provided, and the shapes of the multiple first reinforcing ribs 12 may be different.

[0045] Similarly, a second reinforcing rib 21 can be provided inside both longitudinal beams 2, or it can be provided only inside one of the longitudinal beams 2. The second reinforcing rib 21 can be used to enhance the dynamic stiffness of the longitudinal beam 2. Multiple second reinforcing ribs 21 can be spaced apart along the extension direction of the longitudinal beam 2, so that the vibration noise at the drive motor mounting point (the suspension mounting hole mentioned below) on the longitudinal beam 2 can be attenuated during the transmission to the body connection part 11, thereby improving the NVH performance of the subframe.

[0046] As shown in Figures 1 and 7, in some embodiments, the vehicle body connecting part 11 includes a connecting sleeve 111, and the outer peripheral wall of the connecting sleeve 111 is provided with a third reinforcing rib 112.

[0047] In this embodiment, the connecting sleeve 111 is a hollow cylindrical sleeve. The axial direction of the connecting sleeve 111 is Z-direction, and fasteners such as bolts can pass through the connecting sleeve 111 axially to fix the subframe to the vehicle body. By providing a third reinforcing rib 112 on the outer peripheral wall of the connecting sleeve 111, the strength of the connecting sleeve 111 can be enhanced, ensuring the connection stability between the subframe and the vehicle body, reducing vibration and noise, and thus improving the NVH performance of the subframe.

[0048] As shown in Figure 7, in some embodiments, the third reinforcing rib 112 includes an arc-shaped protrusion 1121 and a plurality of reinforcing teeth 1122. The arc-shaped protrusion 1121 extends circumferentially along the connecting sleeve 111, and the plurality of reinforcing teeth 1122 are respectively disposed on both sides of the arc-shaped protrusion 1121 and are arranged at intervals along the circumferential direction of the connecting sleeve 111.

[0049] Specifically, the crossbeam 1 may include a crossbeam body and vehicle body connecting portions 11 located at both ends of the crossbeam body. A portion of the outer peripheral wall of the connecting sleeve 111 of the vehicle body connecting portion 11 is connected to the crossbeam body, while another portion of the outer peripheral wall is provided with an arc-shaped protrusion 1121 extending circumferentially along the connecting sleeve 111. By providing the arc-shaped protrusion 1121, the circumferential rigidity of the connecting sleeve 111 can be ensured. The connecting sleeve 111 is vertically arranged, that is, the axis of the connecting sleeve 111 is parallel to the height direction of the vehicle (e.g., the vertical direction). The upper side of the arc-shaped protrusion 1121 is provided with a plurality of upward-pointing reinforcing teeth 1122 spaced circumferentially along the connecting sleeve 111, and the lower side of the arc-shaped protrusion 1121 is provided with a plurality of downward-pointing reinforcing teeth 1122 spaced circumferentially along the connecting sleeve 111. By providing the reinforcing teeth 1122, the vertical rigidity of the connecting sleeve 111 can be ensured, thereby making the connection between the connecting sleeve 111 and the vehicle body more reliable.

[0050] As shown in Figures 1 and 2, in some embodiments, two longitudinal beams 2 are spaced apart along the width direction of the vehicle, and each of the two longitudinal beams 2 is provided with a through hole 22 for the corresponding wheel axle to pass through. The longitudinal beams 2 are provided with a fourth reinforcing rib 23 along the circumference of the through hole 22.

[0051] Specifically, the longitudinal beam 2 is provided with a through hole 22 extending along the Y direction. The drive motor can be connected to two wheel axles through a related transmission mechanism. The two wheel axles pass through the through holes 22 on the left and right longitudinal beams 2 respectively to connect with the left and right wheels. The longitudinal beam 2 can be provided with an arc-shaped or annular fourth reinforcing rib 23 along the circumference of the through hole 22, thereby strengthening the rigidity of the longitudinal beam 2 around the through hole 22 and preventing the longitudinal beam 2 from being damaged or broken due to the force exerted by the wheel axles on the hole wall of the through hole 22 during the rotation of the wheel axles driven by the drive motor.

[0052] As shown in Figures 1 and 3, in some embodiments, two crossbeams 1 are spaced apart along the length of the vehicle, and the bottom of each crossbeam 1 is recessed towards the top of the vehicle to form a clearance space 13 for the exhaust pipe to pass through. The clearance spaces 13 of the two crossbeams 1 are provided correspondingly.

[0053] In this embodiment, a clearance space 13 can be provided at the bottom of one end of each crossbeam 1 in the left-right direction. The clearance space 13 can be an upwardly concave arc-shaped space. Compared with electric vehicles, hybrid vehicles are usually equipped with an exhaust pipe, which extends roughly along the front-rear direction of the vehicle. By providing a clearance space 13 at the bottom of each crossbeam 1, the exhaust pipe can pass through the clearance spaces 13 of the two crossbeams 1 sequentially from front to back. That is, this subframe can be used on hybrid vehicles, thereby realizing the sharing of this subframe between electric vehicles and hybrid vehicles.

[0054] As shown in Figures 1 and 2, in some embodiments, the two crossbeams 1 are a front crossbeam and a rear crossbeam, respectively. The front crossbeam is provided with a first mounting hole 14 and a second mounting hole 15 for mounting a drive motor. One of the longitudinal beams 2 has a third mounting hole 24 for mounting a drive motor at one end near the rear crossbeam, and the other longitudinal beam 2 has a fourth mounting hole 25 for mounting a drive motor at one end near the rear crossbeam. The axes of the first mounting hole 14 and the second mounting hole 15 are parallel to the length direction of the vehicle, and the axes of the third mounting hole 24 and the fourth mounting hole 25 are parallel to the width direction of the vehicle.

[0055] Specifically, one of the two crossbeams 1 facing forward is the front crossbeam, and the other facing backward is the rear crossbeam. The front crossbeam has a first mounting hole 14 and a second mounting hole 15 for fixing the front end of the drive motor. The two longitudinal beams 2 have a third mounting hole 24 and a fourth mounting hole 25 near the rear crossbeam for fixing the rear end of the drive motor, thus achieving multi-point fixing of the drive motor and improving its installation stability. Furthermore, the axes of the first mounting hole 14 and the second mounting hole 15 are aligned along the longitudinal direction of the vehicle, while the axes of the third mounting hole 24 and the fourth mounting hole 25 are aligned along the left-right direction of the vehicle. This multi-directional fixing between the drive motor and the subframe further ensures the drive motor's stability under multi-directional forces.

[0056] In some embodiments, the through hole 22 may be located at one end of the longitudinal beam 2 near the front crossbeam, and the third mounting hole 24 and the fourth mounting hole 25 may be located at one end of the longitudinal beam 2 near the rear crossbeam. This arrangement allows the first mounting hole 14, the second mounting hole 15, the third mounting hole 24, and the fourth mounting hole 25 to be distributed as widely as possible, resulting in more even force application from the drive motor to the subframe, better subframe stability, and lower vibration and noise, thus improving the NVH performance of the subframe.

[0057] As shown in Figures 1 and 2, in some embodiments, the longitudinal beam 2 protrudes upwards towards the vehicle, such that the dimension of the longitudinal beam 2 along the vehicle's height direction is larger than the dimension of the crossbeam 1 along the vehicle's height direction. The third mounting hole 24 or the fourth mounting hole 25 is located at the middle of the corresponding longitudinal beam 2 in the vehicle's height direction. The longitudinal beam 2 protruding upwards towards the vehicle, meaning its larger dimension along the Z-direction, provides sufficient space in the vertical direction of the vehicle to accommodate the third mounting hole 24 and the fourth mounting hole 25. In other words, the third mounting hole 24 or the fourth mounting hole 25 can be located at the middle of the longitudinal beam 2 along the vertical direction of the vehicle, ensuring the dynamic stiffness around the third mounting hole 24 and the fourth mounting hole 25. Furthermore, the larger dimension of the longitudinal beam 2 along the vertical direction of the vehicle also provides sufficient space for the through hole 22.

[0058] As shown in Figures 1 and 2, in some embodiments, each longitudinal beam 2 is provided with a first control arm mounting hole 26, a second control arm mounting hole 27, a toe rod mounting hole 28, and a first sand leakage hole 29. The vehicle's suspension system may include components such as a first control arm, a second control arm, and a toe rod. By providing the first control arm mounting hole 26, the second control arm mounting hole 27, and the toe rod mounting hole 28 on the longitudinal beam 2, the first control arm, the second control arm, and the toe rod can be easily installed.

[0059] In some embodiments, a first sand-draining hole 29 can be provided at a suitable position on the longitudinal beam 2, that is, the first sand-draining hole 29 can be located on any surface of the longitudinal beam 2, and multiple first sand-draining holes 29 can be provided. Similarly, a second sand-draining hole 16 can be provided at a suitable position on the crossbeam 1, that is, the second sand-draining hole 16 can be located on any surface of the crossbeam 1, and multiple second sand-draining holes 16 can be provided. The first sand-draining hole 29 and the second sand-draining hole 16 communicate with the internal cavity of the subframe and can be used to discharge sand core residues during the casting process of the subframe. Specifically, the subframe is integrally cast using a mold, and a sand core is fixed inside the mold. By pouring molten metal into the mold, the molten metal can fill the space between the sand core and the mold. After the molten metal has solidified, the mold is demolded, and the subframe is rinsed with a high-pressure air gun or water gun. The sand core inside the subframe can be discharged from the first sand-draining hole 29 and the second sand-draining hole 16. The subframe can be rotated while rinsing to quickly remove sand core residues.

[0060] At least one embodiment of this disclosure also provides a vehicle including the subframe described above. The advantages of the vehicle compared to the related technology are the same as those of the subframe described above, and will not be repeated here.

[0061] While the above disclosure is provided, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this disclosure.

Claims

1. A subframe comprising at least two crossbeams (1) and at least two longitudinal beams (2), At least two of the crossbeams (1) are arranged opposite to each other, and each of the crossbeams (1) is provided with a vehicle body connecting part (11) at both ends. At least two of the longitudinal beams (2) are disposed between at least two of the transverse beams (1), and both ends of each of the longitudinal beams (2) are respectively connected to at least two of the transverse beams (1). At least two of the crossbeams (1) and at least two of the longitudinal beams (2) enclose a frame structure, the frame structure being configured to mount a drive motor. Each of the crossbeams (1) and the longitudinal beams (2) is provided with a reinforcing structure (3).

2. The subframe according to claim 1, wherein, The interiors of at least two of the crossbeams (1) and at least two of the longitudinal beams (2) are hollow, and the at least two of the crossbeams (1) and the at least two of the longitudinal beams (2) are an integral structure.

3. The subframe according to claim 2, wherein, The reinforcing structure (3) includes protrusions formed on the inner walls of the crossbeam (1) and the longitudinal beam (2).

4. The subframe according to claim 2 or 3, wherein, At least one of the beams (1) has a first reinforcing rib (12) inside.

5. The subframe according to any one of claims 2 to 4, wherein, At least one of the longitudinal beams (2) is provided with a second reinforcing rib (21) inside.

6. The subframe according to any one of claims 1 to 5, wherein, The vehicle body connecting part (11) includes a connecting sleeve (111), and the outer peripheral wall of the connecting sleeve (111) is provided with a third reinforcing rib (112).

7. The subframe according to claim 6, wherein, The third reinforcing rib (112) includes an arc-shaped protrusion (1121) and a plurality of reinforcing teeth (1122). The arc-shaped protrusion (1121) extends circumferentially along the connecting sleeve (111), and the plurality of reinforcing teeth (1122) are respectively disposed on both sides of the arc-shaped protrusion (1121) and are arranged at intervals along the circumferential direction of the connecting sleeve (111).

8. The subframe according to any one of claims 1 to 7, wherein, At least two of the longitudinal beams (2) are spaced apart along the width direction of the vehicle, and each of the at least two longitudinal beams (2) is provided with a through hole (22) for the corresponding wheel axle to pass through. Each of the longitudinal beams (2) is provided with a fourth reinforcing rib (23) along the circumference of the corresponding through hole (22).

9. The subframe according to any one of claims 1 to 8, wherein, At least two of the crossbeams (1) are spaced apart along the length of the vehicle, and the bottom of each crossbeam (1) is recessed toward the top of the vehicle to form a clearance space (13) for the exhaust pipe to pass through, and the clearance spaces (13) of the at least two crossbeams (1) are provided correspondingly.

10. The subframe according to any one of claims 1 to 9, wherein, At least two of the crossbeams (1) are a front crossbeam and a rear crossbeam, the front crossbeam being provided with a first mounting hole (14) and a second mounting hole (15) configured for mounting the drive motor. One of the at least two longitudinal beams (2) has a third mounting hole (24) configured for mounting the drive motor at one end near the rear crossbeam, and the other of the at least two longitudinal beams (2) has a fourth mounting hole (25) configured for mounting the drive motor at one end near the rear crossbeam.

11. The subframe according to claim 10, wherein, The axes of the first suspension mounting hole (14) and the second suspension mounting hole (15) are parallel to the length direction of the vehicle. The axes of the third suspension mounting hole (24) and the fourth suspension mounting hole (25) are parallel to the width direction of the vehicle.

12. The subframe according to claim 10 or 11, wherein, The longitudinal beam (2) rises upward toward the vehicle, such that the dimension of the longitudinal beam (2) along the height direction of the vehicle is greater than the dimension of the transverse beam (1) along the height direction of the vehicle. The third suspension mounting hole (24) or the fourth suspension mounting hole (25) is provided at the middle of the corresponding longitudinal beam (2) in the height direction of the vehicle.

13. The subframe according to any one of claims 1 to 12, wherein, Each of the longitudinal beams (2) is provided with a first control arm mounting hole (26), a second control arm mounting hole (27) and a toe bar mounting hole (28) configured for mounting the suspension system of the vehicle, and a first sand leakage hole (29) configured for discharging sand core residue during the subframe forming process.

14. The subframe according to any one of claims 1 to 13, wherein, Each of the crossbeams (1) is provided with a second sand-draining hole (16) configured to drain sand core residues during the subframe forming process.

15. A vehicle comprising a subframe as claimed in any one of claims 1 to 14.

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