Subframe and vehicle

Abstract

The application discloses a subframe and a vehicle, and relates to the technical field of vehicle chassis, and the subframe comprises a first cross beam extending along the width direction of the vehicle, the upper surface of the first cross beam is provided with a mounting groove recessed towards the inside of the first cross beam, a longitudinal beam extending along the length direction of the vehicle, part of the longitudinal beam is located in the mounting groove and connected with the inner wall of the mounting groove, and a suspension support connected to the upper surface of the first cross beam and part of which is connected with the longitudinal beam. According to the subframe provided by the application, the strength and rigidity of the suspension support can be improved, the vibration transmission sensitivity is reduced, and the vehicle has both durability and comfortable driving experience.

Description

Technical Field

[0001] This application relates to the field of vehicle chassis technology, and in particular to a subframe and a vehicle. Background Technology

[0002] In related technologies, vibrations generated by the electric axle during vehicle operation are transmitted to the vehicle body via the subframe, causing body vibration and noise problems. As a key component connecting the powertrain and the vehicle body, the reliability of the connections and vibration isolation performance of the crossbeams, longitudinal beams, and suspension mounts of the subframe are crucial to the overall vehicle reliability and NVH level. However, existing subframe longitudinal beams and front crossbeams mostly use butt-joint lap welding structures, and the suspension mount points are far from the longitudinal beams, resulting in poor dynamic stiffness at the mount points. This makes it difficult to effectively block the vibrations and noise from the electric axle from entering the passenger compartment, affecting ride comfort. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a subframe that can improve the strength and stiffness of the suspension brackets, reduce vibration transmission sensitivity, and enable the vehicle to achieve both durability and a comfortable driving experience.

[0004] This application also proposes a vehicle having the aforementioned subframe.

[0005] According to an embodiment of this application, a subframe includes: a first crossbeam extending along the width direction of the vehicle, the upper surface of the first crossbeam having a mounting groove recessed toward the interior of the first crossbeam; a longitudinal beam extending along the length direction of the vehicle, a portion of the longitudinal beam being located within the mounting groove and connected to the inner wall of the mounting groove; and a suspension bracket connected to the upper surface of the first crossbeam, a portion of the suspension bracket being connected to the longitudinal beam.

[0006] According to the subframe of this application embodiment, the subframe has a mounting groove provided at the first crossbeam, and a portion of the longitudinal beam is located in the mounting groove and connected to the inner wall of the mounting groove, so as to increase the contact area between the longitudinal beam and the first crossbeam, improve the overall strength and rigidity of the subframe, and improve the dynamic rigidity of the suspension bracket by connecting the suspension bracket to the first crossbeam and the longitudinal beam respectively, thereby reducing the vibration transmission sensitivity and effectively reducing the transmission of vibration and noise, so that the vehicle can have a comfortable driving experience while ensuring durability.

[0007] In some embodiments of this application, the suspension bracket includes a first bracket and a second bracket, the first bracket and the second bracket being spaced apart along the width direction, and both the first bracket and the second bracket having mounting portions corresponding to each other; wherein, the first bracket is disposed on the upper surface of the first crossbeam, a portion of the second bracket is disposed on the upper surface of the first crossbeam, and another portion of the second bracket is connected to the longitudinal beam, or, the second bracket is connected to the longitudinal beam.

[0008] In some embodiments of this application, the first crossbeam has a mounting hole that extends through the vehicle along its height direction. The subframe further includes a support tube that passes through the mounting hole and is connected to the inner wall of the mounting hole. The end of the support tube away from the first crossbeam extends obliquely toward the vehicle body and has a connecting portion.

[0009] In some embodiments of this application, the support tube includes: a first tube body, which passes through the mounting hole and is connected to the inner wall of the mounting hole; a second tube body, one end of which is connected to the top of the first tube body; and a third tube body, which is connected to the other end of the second tube body, and the connecting portion is formed at the end of the third tube body away from the second tube body.

[0010] In some embodiments of this application, the connecting portion extends along the height direction, and a mounting hole is formed in the connecting portion that extends through the height direction and connects to the vehicle body.

[0011] In some embodiments of this application, the first tube is a circular tube.

[0012] In some embodiments of this application, the subframe further includes: a control arm mounting bracket, which is disposed on the longitudinal beam and extends along the width direction; and a connecting bracket, which is disposed on the longitudinal beam and connected to the control arm mounting bracket, and the top of the connecting bracket has a sleeve for connection with the vehicle body.

[0013] In some embodiments of this application, the sleeve has a notch extending along the height direction of the vehicle along its circumferential outer wall.

[0014] In some embodiments of this application, the subframe further includes: a second crossbeam, which is spaced apart from the first crossbeam along the length direction, and the second crossbeam is connected to the longitudinal beam; and a mounting bracket, which is connected to the second crossbeam and the longitudinal beam respectively, and the mounting bracket is adapted to mount a control arm.

[0015] The vehicle of an embodiment of this application is described below.

[0016] The vehicle according to the embodiments of this application is provided with the subframe of the above embodiments. Since the vehicle according to the embodiments of this application is provided with the subframe of the above embodiments, the subframe of the vehicle is provided with a mounting groove at the first crossbeam, and part of the longitudinal beam is located in the mounting groove and connected to the inner wall of the mounting groove, so as to increase the contact area between the longitudinal beam and the first crossbeam, improve the overall strength and rigidity of the subframe, and improve the dynamic rigidity of the mounting bracket by connecting the suspension bracket to the first crossbeam and the longitudinal beam respectively, reduce the vibration transmission sensitivity, effectively reduce the transmission of vibration and noise, and enable the vehicle to have a comfortable driving experience while taking into account durability.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the subframe structure according to an embodiment of this application; Figure 2 yes Figure 1 A partial structural diagram of the central suspension bracket and support tube; Figure 3 yes Figure 2 A schematic diagram of the structure after assembly with the vehicle body; Figure 4 yes Figure 1 A partial structural diagram of the connecting bracket and longitudinal beam; Figure 5 yes Figure 4 A schematic diagram of the structure after assembly with the vehicle body; Figure 6 yes Figure 1 A schematic diagram of the structure after the second crossbeam and mounting bracket are assembled with the control arm.

[0019] Figure label: 10. Subframe; 11. First crossbeam; 111. Mounting groove; 112. Mounting hole; 12. Longitudinal beam; 13. Suspension bracket; 131. First bracket; 132. Second bracket; 133. Mounting part; 14. Support tube; 141. First tube body; 142. Second tube body; 143. Third tube body; 144. Connecting part; 1441. Assembly hole; 15. Connecting bracket; 151. Sleeve; 152. Notch; 16. Second crossbeam; 17. Mounting bracket; 18. Control arm mounting bracket; 20. Vehicle body; 21. Control arm. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] The following is for reference. Figures 1-6 The subframe 10 according to an embodiment of this application is described. The subframe 10 includes a first crossbeam 11, a longitudinal beam 12, and a suspension bracket 13.

[0022] A first crossbeam 11 extends along the width direction of the vehicle, and a mounting groove 111 is formed on the upper surface of the first crossbeam 11, recessed towards the interior of the first crossbeam 11. A longitudinal beam 12 extends along the length direction of the vehicle, with a portion of the longitudinal beam 12 located within the mounting groove 111 and connected to the inner wall of the mounting groove 111. A suspension bracket 13 is connected to the upper surface of the first crossbeam 11, and a portion of the suspension bracket 13 is connected to the longitudinal beam 12.

[0023] Currently, vibrations generated by the electric axle during vehicle operation are transmitted to the vehicle body via the subframe, causing body vibration and noise issues. As a key component connecting the powertrain and the vehicle body, the reliability of the connections and vibration isolation performance of the crossbeams, longitudinal beams, and suspension mounts of the subframe are crucial to the overall vehicle reliability and NVH levels. However, existing subframe longitudinal beams and front crossbeams mostly use butt-joint lap welding structures, and the suspension mount points are far from the longitudinal beams, resulting in poor dynamic stiffness at the mount points. This makes it difficult to effectively block the vibrations and noise from the electric axle from entering the passenger compartment, affecting ride comfort.

[0024] In response, this application proposes a subframe 10, which can improve the strength and rigidity of the suspension bracket 13, reduce vibration transmission sensitivity, and enable the vehicle to have a comfortable driving experience while ensuring durability.

[0025] Specifically, the subframe 10 may include a first crossbeam 11, a longitudinal beam 12, and a suspension bracket 13. The first crossbeam 11 may be along the width direction of the vehicle (e.g., Figure 1 Extending in the Y direction shown, the first crossbeam 11 can be a front crossbeam, and a mounting groove 111 can be formed on the upper surface of the first crossbeam 11. The mounting groove 111 can be recessed towards the interior of the first crossbeam 11. In some embodiments, the mounting groove 111 can be formed by cutting the upper surface of the first crossbeam 11. The longitudinal beam 12 can extend along the length direction of the vehicle (e.g., in the Y direction). Figure 1Extending in the X direction shown, a portion of the longitudinal beam 12 may be located within the mounting groove 111, and the portion of the longitudinal beam 12 located within the mounting groove 111 may be connected to the inner wall of the mounting groove 111. Optionally, the longitudinal beam 12 and the inner wall of the mounting groove 111 may be directly welded together through the contact surface.

[0026] In some embodiments, there can be two longitudinal beams 12, which can be spaced apart along the width direction. Similarly, there can be two mounting slots 111, and the two longitudinal beams 12 and the two mounting slots 111 can be arranged in a one-to-one correspondence. By fixing the two longitudinal beams 12 to the two mounting slots 111 by welding, that is, by first overlapping the two longitudinal beams 12 at the two mounting slots 111 during the assembly process, and then welding the overlapping edges of the two longitudinal beams 12 and the two mounting slots 111, the weld length between the longitudinal beams 12 and the first crossbeam 11 can be extended, thereby improving the overall strength and rigidity of the subframe 10. Furthermore, during the production of the subframe 10, the longitudinal beams 12 are easier to assemble and easier to implement in terms of process.

[0027] Furthermore, the suspension bracket 13 can be connected to the upper surface of the first crossbeam 11. The suspension bracket 13 can be used to connect the electric bridge, and the vibration of the electric bridge can be transmitted to the first crossbeam 11 through the suspension bracket 13. Part of the suspension bracket 13 can be connected to the longitudinal beam 12. It can be understood that the suspension bracket 13 can be connected to both the first crossbeam 11 and the longitudinal beam 12. It should be noted that the suspension bracket 13 and the longitudinal beam 12 can be fixed by direct welding of the contact surfaces. Therefore, by connecting the suspension bracket 13 to both the first crossbeam 11 and the longitudinal beam 12, the dynamic stiffness of the suspension bracket 13 can be improved, thereby reducing the sensitivity of the vibration transmitted by the suspension bracket 13, effectively reducing vibration and noise, improving the NVH performance of the vehicle, and ensuring a comfortable driving experience for passengers.

[0028] In some embodiments, the dimension of the suspension bracket 13 along the length direction of the vehicle can be any value between 75mm and 90mm. For example, the dimension of the suspension bracket 13 along the length direction of the vehicle can be, but is not limited to, 75mm, 80mm, 85mm, 90mm, etc. This facilitates welding of the suspension bracket 13 and helps to improve assembly efficiency.

[0029] In short, the subframe 10 of this application embodiment improves the contact area between the longitudinal beam 12 and the first crossbeam 11 by providing a mounting groove 111 at the first crossbeam 11, with a portion of the longitudinal beam 12 located within the mounting groove 111 and connected to the inner wall of the mounting groove 111. This improves the overall strength and rigidity of the subframe 10. Furthermore, by connecting the suspension bracket 13 to both the first crossbeam 11 and the longitudinal beam 12, the dynamic stiffness of the suspension bracket 13 is improved, and the vibration transmission sensitivity is reduced. This effectively reduces vibration transmission and noise, allowing the vehicle to maintain durability while providing a comfortable driving experience.

[0030] like Figure 2 As shown, in some embodiments of this application, the suspension bracket 13 may include a first bracket 131 and a second bracket 132. The first bracket 131 and the second bracket 132 may be spaced apart along the width direction. Both the first bracket 131 and the second bracket 132 have mounting portions 133 formed on them, and the mounting portions 133 of the first bracket 131 and the second bracket 132 may be correspondingly arranged to each other. It is understood that the mounting portions 133 of the first bracket 131 and the second bracket 132 can be correspondingly arranged along the width direction to ensure the stability of the suspension bracket 13 connection. Further, the first bracket 131 may be disposed on the upper surface of the first crossbeam 11. Optionally, the first bracket 131 and the first crossbeam 11 may be directly welded together via a contact surface. A portion of the second support 132 can be disposed on the upper surface of the first crossbeam 11, and another portion of the second support 132 can be connected to the longitudinal beam 12, thereby enabling the second support 132 to be connected to the first crossbeam 11 and the longitudinal beam 12 respectively. In other embodiments, the first support 131 can be disposed on the upper surface of the first crossbeam 11, and the second support 132 can be directly connected to the longitudinal beam 12, ensuring that the suspension support 13 can be connected to the first crossbeam 11 and the longitudinal beam 12, thereby effectively improving the dynamic stiffness of the suspension support 13.

[0031] like Figure 3 As shown, in some embodiments of this application, the first crossbeam 11 may be formed with mounting holes 112, and the mounting holes 112 may be along the height direction of the vehicle (e.g., Figure 1As shown in the Z direction, the subframe 10 can also include a support tube 14, which can pass through the mounting hole 112 and connect to the inner wall of the mounting hole 112. Optionally, the support tube 14 and the inner wall of the mounting hole 112 can be directly welded together through the contact surface. The end of the support tube 14 away from the first crossbeam 11 can extend obliquely toward the vehicle body 20, and the end of the support tube 14 away from the first crossbeam 11 can form a connecting part 144, which can be connected to the vehicle body 20. Optionally, the connecting part 144 and the vehicle body 20 can be detachably connected by screws or bolts. By setting the support tube 14, the subframe 10 can be connected to the vehicle body 20. In some embodiments, the support tube 14 can be close to the longitudinal beam 12 and the second bracket 132. This setting can improve the stiffness of the suspension bracket 13, effectively reduce the transmission of vibration and noise, improve the NVH performance of the vehicle, and ensure that the driver and passengers have a comfortable driving experience.

[0032] like Figure 2 and Figure 3 As shown, in some embodiments of this application, the support tube 14 may include a first tube 141, a second tube 142, and a third tube 143 connected in sequence. Specifically, the first tube 141 may pass through the mounting hole 112 and may be connected to the inner wall of the mounting hole 112. Optionally, the first tube 141 and the inner wall of the mounting hole 112 may be directly welded together through a contact surface. One end of the second tube 142 may be connected to the top of the first tube 141. The second tube 142 may be constructed as a bent tube. The third tube 143 may be connected to the other end of the second tube 142, and a connecting portion 144 may be formed at the end of the third tube 143 away from the second tube 142. In some embodiments, the extension direction of the first tube 141 is orthogonal to the extension direction of the third tube 143. The first tube 141, the second tube 142 and the third tube 143 can be integrally formed parts. The above structure can reduce the space occupied by the subframe 10 in the height direction and can also effectively improve the stability of the connection between the subframe 10 and the vehicle body 20.

[0033] like Figure 2 As shown, in some embodiments of this application, the connecting portion 144 can extend along the height direction, and an assembly hole 1441 can be formed inside the connecting portion 144. The assembly hole 1441 can be provided through along the height direction and can cooperate with the vehicle body 20. In some embodiments, the vehicle body 20 can be provided with bolts, which can pass through the assembly hole 1441 and connect with the connecting portion 144, thereby connecting the support tube 14 to the vehicle body 20. The above connection method can improve the stability of the connection between the support tube 14 and the vehicle body 20.

[0034] like Figure 2 As shown, in some embodiments of this application, the first tube 141 can be constructed as a circular tube, and correspondingly, the mounting hole 112 can be a circular hole. When assembling the subframe 10, the workers adjust the angle of the first tube 141 before welding it to the mounting hole 112, thereby changing the overall angle of the support tube 14, so that the subframe 10 can match different mounting points of the body 20, reducing the development cost of the subframe and the body 20, and enabling the subframe 10 to be applied to various vehicle models.

[0035] like Figure 4 and Figure 5 As shown in some embodiments of this application, the subframe 10 may further include a control arm mounting bracket 18 and a connecting bracket 15. The control arm mounting bracket 18 may be disposed on the longitudinal beam 12 and may extend in the width direction. The control arm mounting bracket 18 may be used to mount the control arm 21. The connecting bracket 15 may be disposed on the longitudinal beam 12 and may be connected to the control arm mounting bracket 18. Optionally, the connecting bracket 15 and the control arm mounting bracket 18 may be directly welded together through contact surfaces. A sleeve 151 may be formed on the top of the connecting bracket 15. The sleeve 151 may be connected to the vehicle body 20. Optionally, the sleeve 151 and the vehicle body 20 may be detachably connected by screws or bolts. By providing the sleeve 151, the subframe 10 and the vehicle body 20 can be connected to improve the stability of the connection between the subframe 10 and the vehicle body 20. By connecting one end of the connecting bracket 15 to the longitudinal beam 12 and the other end of the connecting bracket 15 to the control arm mounting bracket 18, the dynamic stiffness of the swing arm mounting point and the lateral stiffness of the whole vehicle are improved.

[0036] Furthermore, the sleeve 151 may have a notch 152 formed on its circumferential outer wall. The notch 152 may extend along the height direction of the vehicle. It is understood that the notch 152 may be a slotted structure. The notch 152 may reduce the structural strength of the sleeve 151 to a certain extent. When the vehicle collides, the sleeve 151 may detach from the body 20, thereby achieving the overall detachment of the subframe 10. This prevents the subframe 10 from intruding into the passenger compartment, minimizing the injury to the occupants caused by the collision, significantly improving the vehicle's safety collision performance, and providing more reliable protection for the life safety of the occupants. In some instances, the width of the notch 152 can be L, satisfying the relationship: 5mm≤L≤7mm. That is, the width of the notch 152 can be any value between 5mm and 7mm. For example, the width of the notch 152 can be, but is not limited to, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, etc. If the width of the notch 152 is large, it is difficult to ensure the stability of the connection between the subframe 10 and the body 20. If the width of the notch 152 is small, the sleeve 151 will not detach when the vehicle is involved in a collision. Therefore, by setting the width of the notch 152 within the above range, the sleeve 151 can detach from the body 20, preventing the subframe 10 from intruding into the passenger compartment, improving the vehicle's safety collision performance, and providing more reliable protection for the lives of the occupants.

[0037] like Figure 1 and Figure 6 As shown, in some embodiments of this application, the subframe 10 further includes a second crossbeam 16 and a mounting bracket 17. The second crossbeam 16 and the first crossbeam 11 can be spaced apart along the length direction. The second crossbeam 16 can be constructed as a rear crossbeam and can be connected to the longitudinal beam 12. The mounting bracket 17 can be connected to both the second crossbeam 16 and the longitudinal beam 12, and can be used to mount the control arm 21. In some embodiments, the mounting bracket 17 can be fixed to the second crossbeam 16 and the longitudinal beam 12 by direct welding of the contact surfaces. The mounting bracket 17 can be welded to the second crossbeam 16 while being welded to the longitudinal beam 12, thereby improving the rigidity and overall strength of the mounting bracket 17. In some embodiments, the longitudinal beam 12 can be a tubular beam structure, and the second crossbeam 16 can be a square tube structure, thereby reducing development costs, simplifying molding, and making the structure easy to implement. The mounting bracket 17 can be a separate structure, capable of matching the installation position of different vehicle bodies 20, and the mounting bracket 17 can be directed to the longitudinal beam 12 of the vehicle body 20, facilitating the optimized arrangement of the force transmission channel and improving collision performance.

[0038] The vehicle of an embodiment of this application is described below.

[0039] The vehicle according to the present application embodiment is provided with the subframe 10 of the above embodiment. Since the vehicle according to the present application embodiment is provided with the subframe 10 of the above embodiment, the subframe 10 of the vehicle is provided with a mounting groove 111 at the first crossbeam 11, and part of the longitudinal beam 12 is located in the mounting groove 111 and connected to the inner wall of the mounting groove 111, so as to increase the contact area between the longitudinal beam 12 and the first crossbeam 11, improve the overall strength and rigidity of the subframe 10, and improve the dynamic rigidity of the suspension bracket 13 by connecting the suspension bracket 13 to the first crossbeam 11 and the longitudinal beam 12 respectively, reduce the vibration transmission sensitivity, effectively reduce the transmission of vibration and noise, and enable the vehicle to have a comfortable driving experience while taking into account durability.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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 application.

[0041] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0042] In the description of this application, "multiple" means two or more.

[0043] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0044] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A subframe, characterized in that, include: The first crossbeam (11) extends along the width direction of the vehicle, and the upper surface of the first crossbeam (11) has a mounting groove (111) recessed toward the interior of the first crossbeam (11). A longitudinal beam (12) extends along the length of the vehicle, and a portion of the longitudinal beam (12) is located within the mounting groove (111) and connected to the inner wall of the mounting groove (111); Suspension bracket (13) is connected to the upper surface of the first crossbeam (11), and a portion of the suspension bracket (13) is connected to the longitudinal beam (12).

2. The subframe according to claim 1, characterized in that, The suspension bracket (13) includes a first bracket (131) and a second bracket (132), the first bracket (131) and the second bracket (132) are spaced apart along the width direction, and the first bracket (131) and the second bracket (132) each have a mounting part (133) that is correspondingly provided to each other. Wherein, the first bracket (131) is disposed on the upper surface of the first crossbeam (11), a part of the second bracket (132) is disposed on the upper surface of the first crossbeam (11), and the other part of the second bracket (132) is connected to the longitudinal beam (12), or the second bracket (132) is connected to the longitudinal beam (12).

3. The subframe according to claim 1, characterized in that, The first crossbeam (11) has a mounting hole (112) extending through the vehicle in the height direction, and the subframe further includes: The support tube (14) passes through the mounting hole (112) and is connected to the inner wall of the mounting hole (112). The end of the support tube (14) away from the first crossbeam (11) extends obliquely toward the vehicle body (20) and forms a connecting part (144).

4. The subframe according to claim 3, characterized in that, The support tube (14) includes: The first tube (141) passes through the mounting hole (112) and is connected to the inner wall of the mounting hole (112); The second tube (142) has one end connected to the top of the first tube (141); The third tube (143) is connected to the other end of the second tube (142), and the connecting part (144) is formed at the end of the third tube (143) away from the second tube (142).

5. The subframe according to claim 4, characterized in that, The connecting portion (144) extends along the height direction, and an assembly hole (1441) is formed in the connecting portion (144) that extends through the height direction and is connected to the vehicle body (20).

6. The subframe according to claim 4, characterized in that, The first tube (141) is a circular tube.

7. The subframe according to claim 1, characterized in that, Also includes: A control arm mounting bracket (18) is disposed on the longitudinal beam (12) and extends along the width direction; A connecting bracket (15) is provided on the longitudinal beam (12) and connected to the control arm mounting bracket (18), and a sleeve (151) for connecting to the vehicle body (20) is formed on the top of the connecting bracket (15).

8. The subframe according to claim 7, characterized in that, The sleeve (151) has a notch (152) extending in the height direction of the vehicle along its circumferential outer wall.

9. The subframe according to claim 1, characterized in that, Also includes: The second crossbeam (16) is spaced apart from the first crossbeam (11) along the length direction, and the second crossbeam (16) is connected to the longitudinal beam (12); Mounting bracket (17) is connected to the second crossbeam (16) and the longitudinal beam (12) respectively, and the mounting bracket (17) is adapted to mount the control arm (21).

10. A vehicle, characterized in that, Includes the subframe as described in any one of claims 1-9.

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