Auxiliary frame and vehicle

Abstract

The utility model provides an auxiliary frame and a vehicle and relates to the technical field of vehicle parts, the auxiliary frame comprises cross beams and longitudinal beams, the two cross beams are oppositely arranged, the two ends of each cross beam are respectively provided with a vehicle body connecting part, the two longitudinal beams are arranged between the two cross beams, the two ends of each longitudinal beam are respectively connected with the two cross beams, and the two cross beams are connected with the two longitudinal beams. The two cross beams and the two longitudinal beams define a frame-shaped structure, the frame-shaped structure is used for installing a driving motor, and reinforcing structures are arranged at the connecting positions of the cross beams and the longitudinal beams. Vibration noise generated when the driving motor is excited by the road surface can be transmitted to the cross beams and / or the longitudinal beams, the reinforcing structures are arranged at the connecting positions of the cross beams and the longitudinal beams, namely, the dynamic stiffness of the connecting positions is high, the vibration noise can be effectively absorbed, the vibration noise transmitted to the vehicle body connecting part or the vehicle body is small, and the service life of the vehicle body is prolonged. In other words, the noise transfer factor (VTF) is reduced, so that the noise vibration and harshness (NVH) performance of the auxiliary frame is improved, and the riding comfort of a driver and passengers in a passenger compartment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle parts, and concretely relates to a subframe and vehicle. BACKGROUND

[0002] The subframe is a key component in the chassis of an electric vehicle, and provides mounting points for drive motors and vehicle suspension systems and other components, so as to transmit the force of the drive motor and the suspension system to the vehicle body. Since the existing subframe has poor NVH performance (Noise, Vibration, and Harshness), the vibration noise generated by the drive motor due to road excitation is easily transmitted to the vehicle body through the subframe during driving, thereby bringing an unpleasant experience to the driver and passengers in the passenger compartment. SUMMARY

[0003] The utility model aims at solving the technical problem that the drive motor noise is transmitted to the passenger compartment through the subframe in the related art.

[0004] On the one hand, the utility model provides a subframe, including crossbeam and stringer, two crossbeam opposite setting, every crossbeam's both ends are equipped with vehicle body connecting part respectively, two crossbeam between being equipped with two stringer, every stringer's both ends are connected with two crossbeam respectively, two crossbeam and two stringer surround and form frame type structure, frame type structure is used to install drive motor, every crossbeam with stringer's junction is equipped with reinforcing structure.

[0005] Optionally, the interiors of the two crossbeams and the two stringers are hollow, and the two crossbeams and the two stringers are integrated structures.

[0006] Optionally, the reinforcing structure is a protrusion formed on the inner wall of the crossbeam and the stringer.

[0007] And / or, the interior of at least one crossbeam is provided with a first reinforcing rib.

[0008] And / or, the interior of at least one stringer is provided with a second reinforcing rib.

[0009] Optionally, the vehicle body connecting part includes a connecting sleeve, and a third reinforcing rib is arranged on the outer peripheral wall of the connecting sleeve.

[0010] Optionally, the third reinforcing rib includes an arc-shaped protrusion and reinforcing teeth, the arc-shaped protrusion is arranged along the circumference of the connecting sleeve, and a plurality of reinforcing teeth are arranged on both sides of the arc-shaped protrusion and spaced apart along the circumference of the connecting sleeve.

[0011] Optionally, the two cross beams are arranged in a front-rear direction of the vehicle, the two longitudinal beams are arranged in a left-right direction of the vehicle, the two longitudinal beams are respectively provided with a through hole for a corresponding wheel shaft to pass through, and the longitudinal beam is provided with a fourth reinforcing rib along a circumferential direction of the through hole.

[0012] Optionally, a bottom of each cross beam is recessed towards an upper side of the vehicle to form an avoiding space for an exhaust pipe to pass through, and the avoiding spaces of the two cross beams are arranged correspondingly.

[0013] Optionally, the two cross beams are a front cross beam and a rear cross beam respectively, the front cross beam is provided with a first suspension mounting hole and a second suspension mounting hole for mounting a driving motor, one of the longitudinal beams is provided with a third suspension mounting hole for mounting the driving motor near one end of the rear cross beam, and the other longitudinal beam is provided with a fourth suspension mounting hole for mounting the driving motor near one end of the rear cross beam.

[0014] Optionally, the longitudinal beam is raised towards an upper side of the vehicle, so that a dimension of the longitudinal beam in a vertical direction is greater than that of the cross beam, and the third suspension mounting hole or the fourth suspension mounting hole is arranged at a middle part of the longitudinal beam in the vertical direction.

[0015] And / or, the longitudinal beam is provided with a first control arm mounting hole, a second control arm mounting hole, a toe bar mounting hole and a first sand leakage hole.

[0016] And / or, the cross beam is provided with a second sand leakage hole.

[0017] In another aspect, the utility model provides a vehicle which comprises the auxiliary frame.

[0018] Compared with the prior art, the auxiliary frame and the vehicle have at least the following advantages:

[0019] The two cross beams of the auxiliary frame are oppositely arranged, and the two ends of each cross beam are respectively provided with a vehicle body connecting part, the cross beam can be connected with the vehicle body through the vehicle body connecting part, so that the installation of the auxiliary frame on the vehicle body is realized, meanwhile, two longitudinal beams are arranged between the two oppositely arranged cross beams, and the two ends of each longitudinal beam are respectively connected with the two cross beams, specifically, one end of the two longitudinal beams along the positive direction of the X axis is connected with the part of one of the cross beams except the two end vehicle body connecting parts, and the other end of the two longitudinal beams along the negative direction of the X axis is connected with the part of the other cross beam except the two end vehicle body connecting parts, so as to form a frame structure, the frame structure is used for mounting the driving motor, that is, the driving motor is connected with the cross beam and / or the longitudinal beam, the vibration noise generated by the driving motor when being excited by the road surface can be transmitted to the cross beam and / or the longitudinal beam, and the connecting position of each cross beam and longitudinal beam is provided with a reinforcing structure, that is, the dynamic stiffness of the connecting position is high, the vibration noise can be effectively absorbed, so that the vibration noise transmitted to the vehicle body connecting part or the vehicle body is small, that is, the noise transmission VTF (Vibration Transfer Function) is reduced, so as to improve the NVH performance of the auxiliary frame and ensure the riding comfort of the passengers in the passenger compartment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the auxiliary frame of the embodiment of the utility model;

[0021] Figure 2 It is a structure schematic view of another view of the auxiliary frame of the embodiment of the utility model;

[0022] Figure 3 It is a structure schematic view of another view of the auxiliary frame of the embodiment of the utility model;

[0023] Figure 4 It is a partial sectional view of the auxiliary frame of the embodiment of the utility model;

[0024] Figure 5 It is a partial sectional view of another view of the auxiliary frame of the embodiment of the utility model;

[0025] Figure 6 It is a partial sectional view of another view of the auxiliary frame of the embodiment of the utility model;

[0026] Figure 7 It is Figure 1 It is an enlarged schematic view of A in the middle.

[0027] BRIEF DESCRIPTION OF DRAWINGS:

[0028] 1, beam; 11, vehicle body connecting part; 111, connecting sleeve; 112, third reinforcing rib; 1121, arc-shaped protrusion; 1122, reinforcing tooth; 12, first reinforcing rib; 13, avoiding 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, toe bar mounting hole; 29, first sand leakage hole; 3, reinforcing structure. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purpose, characteristics and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "cooperation" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0031] In addition, it should be noted that in the description of the utility model, it should be pointed out that the terms and nouns in each embodiment, such as "upper", "lower", "front", "rear" and other words indicating the position, are only for the purpose of simplifying the position relationship based on the description of the drawings, and do not represent that the elements and devices indicated must be operated according to the specific position and limited operation and method, structure in the specification, and such position terms do not constitute a limitation on the utility model.

[0032] This paper establishes XYZ coordinate system, wherein, X axis represents the front and rear direction of the vehicle, X axis positive direction represents the front of the vehicle, X axis negative direction represents the rear of the vehicle, Y axis represents the left and right direction of the vehicle, Y axis positive direction represents the left of the vehicle, Y axis negative direction represents the right of the vehicle, Z axis represents the up and down direction of the vehicle, the positive direction of Z axis represents the upper of the vehicle, and the negative direction of Z axis represents the lower of the vehicle. At the same time, it should be pointed out that the meaning of the foregoing X axis, Y axis and Z axis is only for the purpose of facilitating the description of the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a specific position, a specific position structure and operation, therefore, it cannot be understood as a limitation on the utility model.

[0033] As Figures 1-4As shown, the utility model discloses a kind of subframes, including crossbeam 1 and longitudinal beam 2, two the crossbeam 1 is oppositely arranged, and the both ends of each crossbeam 1 are respectively equipped with body connecting portion 11, two longitudinal beam 2 are arranged between the two crossbeam 1, and the both ends of each longitudinal beam 2 are respectively connected with two crossbeam 1, two crossbeam 1 and two longitudinal beam 2 are enclosed to form frame structure, and the frame structure is used to install driving motor, and the junction of each crossbeam 1 and longitudinal beam 2 is equipped with reinforcing structure 3.

[0034] The subframe of the embodiment can be used as a rear subframe of an electrically driven vehicle, and can be made of aluminum material, which is relatively light in weight. The crossbeams 1 are arranged to extend substantially along the Y direction, and the Y-directional ends of the crossbeams 1, i.e., the left and right ends, are respectively provided with body connecting portions 11 for connection with the vehicle body. The two crossbeams 1 are arranged to be spaced apart along the X direction. The longitudinal beams 2 are arranged to extend substantially along the X direction, and the two longitudinal beams 2 are arranged to be spaced apart along the Y direction.

[0035] In the embodiment, the two crossbeams 1 of the subframe are oppositely arranged, and each crossbeam 1 is provided with a body connecting portion 11 at each end. The crossbeams 1 can be connected with the vehicle body through the body connecting portions 11, so as to realize the installation of the subframe on the vehicle body. Meanwhile, two longitudinal beams 2 are arranged between the oppositely arranged two crossbeams 1, and the both ends of each longitudinal beam 2 are respectively connected with two crossbeams 1. Specifically, one end of each longitudinal beam 2 along the positive direction of the X axis is connected with a portion of one of the crossbeams 1 other than the body connecting portions 11 at the two ends, and the other end of each longitudinal beam 2 along the negative direction of the X axis is connected with a portion of the other crossbeam 1 other than the body connecting portions 11 at the two ends, so as to form a frame structure. The frame structure is used to install a driving motor, i.e., the driving motor is connected with the crossbeams 1 and / or the longitudinal beams 2. When the driving motor is excited by the road surface, the vibration noise generated by the driving motor can be transmitted to the crossbeams 1 and / or the longitudinal beams 2. The junctions of each crossbeam 1 and longitudinal beam 2 are provided with reinforcing structures 3, i.e., the dynamic stiffness of the junctions is high, so as to effectively absorb the vibration noise. The vibration noise transmitted to the body connecting portions 11 or the vehicle body is small, i.e., the noise transmission VTF (Vibration Transfer Function) is reduced, so as to improve the NVH performance of the subframe and ensure the riding comfort of the passengers in the passenger compartment.

[0036] Optionally, the interiors of the two crossbeams 1 and the two longitudinal beams 2 are hollow, and the two crossbeams 1 and the two longitudinal beams 2 are of an integral structure. The interiors of the crossbeams 1 and the longitudinal beams 2 are hollow, which can reduce the amount of material and is conducive to the lightweight of the subframe. Compared with the scheme that the two crossbeams 1 and the two longitudinal beams 2 are welded to form the subframe, the two crossbeams 1 and the two longitudinal beams 2 are of an integral structure, such as an integral die-casting, which does not need to be welded, the forming mode is simple, no welding seam is generated, the overall rigidity and strength are higher, and the force transmission stability is better.

[0037] AsFigures 4-6 As shown in the figure, optionally, the reinforcing structure 3 is a protrusion formed on the inner wall of the cross beam 1 and the longitudinal beam 2;

[0038] And / or, the inside of at least one of the cross beams 1 is provided with a first reinforcing rib 12;

[0039] And / or, the inside of at least one of the longitudinal beams 2 is provided with a second reinforcing rib 21.

[0040] In this embodiment, the reinforcing structure 3 is a reinforcing rib formed by protruding the inner wall at the joint of the cross beam 1 and the longitudinal beam 2, the first reinforcing rib 12 is a reinforcing rib formed by protruding the inner wall of the cross beam 1 except for the joint of the cross beam and the longitudinal beam, and the second reinforcing rib 21 is a reinforcing rib formed by protruding the inner wall of the longitudinal beam 2 except for the joint of the cross beam and the longitudinal beam. The reinforcing structure 3, the first reinforcing rib 12, the second reinforcing rib 21, the cross beam 1 and the longitudinal beam 2 are integrally formed, the forming method is simple, and the strength is good. In addition, the reinforcing structure 3, the first reinforcing rib 12 and the second reinforcing rib 21 are located inside the cross beam and the longitudinal beam, which does not increase the space occupation of the subframe and does not interfere with the arrangement of related equipment around the subframe under the premise of improving the strength of the subframe.

[0041] The first reinforcing rib 12 can be arranged inside both of the cross beams 1, or only one of the cross beams 1. The first reinforcing rib 12 can be used to strengthen the dynamic stiffness of the cross beam 1. The first reinforcing rib 12 can be arranged close to the body connection part 11, or between the driving motor mounting point (suspension mounting hole in the following) on the cross beam 1 and the body connection part 11, so that the vibration noise at the driving motor mounting point on the cross beam 1 can be attenuated in the process of being transmitted to the body connection part 11, improving the NVH performance of the subframe. The first reinforcing rib 12 can be linear, L-shaped, etc. Multiple first reinforcing ribs 12 can be arranged, and the shapes of the multiple first reinforcing ribs 12 can be different.

[0042] The second reinforcing rib 21 can be arranged inside both of the longitudinal beams 2, or only one of the longitudinal beams 2. The second reinforcing rib 21 can be used to strengthen the dynamic stiffness of the longitudinal beam 2. Multiple second reinforcing ribs 21 can be arranged along the extension direction of the longitudinal beam 2, so that the vibration noise at the driving motor mounting point (suspension mounting hole in the following) on the longitudinal beam 2 can be attenuated in the process of being transmitted to the body connection part 11, improving the NVH performance of the subframe.

[0043] As shown in the figure, Figure 1 And Figure 7 Optionally, the body connection 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.

[0044] In the embodiment, the connecting sleeve 111 is a hollow cylindrical sleeve, the axis of the connecting sleeve 111 is in the Z direction, and a fastener such as a bolt can pass through the connecting sleeve 111 in the axial direction to fix and install the subframe on the vehicle body. By arranging the third reinforcing ribs 112 on the outer peripheral wall of the connecting sleeve 111, the strength of the connecting sleeve 111 can be enhanced, the connection stability of the subframe and the vehicle body can be ensured, vibration noise can be reduced, and the NVH performance of the subframe can be improved.

[0045] As shown in Figure 7 Optionally, the third reinforcing rib 112 includes an arc-shaped protrusion 1121 and a reinforcing tooth 1122, the arc-shaped protrusion 1121 is arranged along the circumference of the connecting sleeve 111, and a plurality of reinforcing teeth 1122 are arranged on both sides of the arc-shaped protrusion 1121 along the circumference of the connecting sleeve 111.

[0046] Specifically, the cross beam 1 can include a cross beam body and a vehicle body connecting portion 11 at both ends of the cross beam body, part of the outer peripheral wall of the connecting sleeve 111 of the vehicle body connecting portion 11 is connected with the cross beam body, and the other part is provided with an arc-shaped protrusion 1121 extending along the circumference of the connecting sleeve 111. By arranging the arc-shaped protrusion 1121, the circumferential rigidity of the connecting sleeve 111 can be ensured; the connecting sleeve 111 is arranged vertically, a plurality of reinforcing teeth 1122 with pointed ends upward are arranged on the upper side of the arc-shaped protrusion 1121 along the circumference of the connecting sleeve 111, and a plurality of reinforcing teeth 1122 with pointed ends downward are arranged on the lower side of the arc-shaped protrusion 1121 along the circumference of the connecting sleeve 111. By arranging the reinforcing teeth 1122, the vertical rigidity of the connecting sleeve 111 can be ensured; so that the connection between the connecting sleeve 111 and the vehicle body is more reliable.

[0047] As shown in Figures 1-2 Optionally, two longitudinal beams 2 are arranged along the left-right direction of the vehicle, and a through hole 22 for passing through a corresponding wheel shaft is arranged on each of the two longitudinal beams 2, and a fourth reinforcing rib 23 is arranged on the longitudinal beam 2 along the circumference of the through hole 22.

[0048] Specifically, the longitudinal beam 2 is provided with a through hole 22 penetrating in the Y direction, a drive motor can be connected with two wheel shafts through a related transmission mechanism, and the two wheel shafts pass through the through holes 22 on the left and right longitudinal beams 2 respectively to be connected 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, which can enhance the rigidity of the longitudinal beam 2 around the through hole 22, and avoid damage and fracture of the longitudinal beam 2 due to the force applied by the wheel shaft to the hole wall of the through hole 22 during the rotation of the drive motor.

[0049] As shown in Figure 3As shown, optionally, the two beams 1 are arranged in the front-rear direction of the vehicle, and the bottom of each beam 1 is recessed upward to form an avoidance space 13 for the exhaust pipe to pass through, and the avoidance spaces 13 of the two beams 1 are arranged correspondingly.

[0050] In the embodiment, the avoidance space can be arranged at the bottom of one end of each beam 1 in the left-right direction, and the avoidance space 13 can be an arc-shaped space recessed upward. Compared with the electric vehicle, the hybrid vehicle is usually also provided with an exhaust pipe arranged in the front-rear direction of the vehicle. By arranging the avoidance space 13 at the bottom of each beam 1, the exhaust pipe can pass through the avoidance spaces 13 of the two beams 1 from front to back, that is, the auxiliary frame can be applied to the hybrid vehicle, so as to realize the common use of the auxiliary frame in the electric vehicle and the hybrid vehicle.

[0051] As shown, Figures 1-2 Optionally, the two beams 1 are a front beam and a rear beam, respectively, the front beam is provided with a first suspension mounting hole 14 and a second suspension mounting hole 15 for mounting the driving motor, one of the longitudinal beams 2 is provided with a third suspension mounting hole 24 near one end of the rear beam for mounting the driving motor, and the other longitudinal beam 2 is provided with a fourth suspension mounting hole 25 near one end of the rear beam for mounting the driving motor, the axes of the first suspension mounting hole 14 and the second suspension mounting hole 15 are in the front-rear direction of the vehicle, and the axes of the third suspension mounting hole 24 and the fourth suspension mounting hole 25 are in the left-right direction of the vehicle.

[0052] Specifically, one of the two beams 1 towards the front of the vehicle is a front beam, and one towards the rear of the vehicle is a rear beam, the front beam is provided with a first suspension mounting hole 14 and a second suspension mounting hole 15 for fixing the front end of the driving motor, and the two longitudinal beams 2 are provided with a third suspension mounting hole 24 and a fourth suspension mounting hole 25 near one end of the rear beam for fixing the rear end of the driving motor, so as to realize multi-point fixing of the driving motor, and the installation stability of the driving motor is better; moreover, the axes of the first suspension mounting hole 14 and the second suspension mounting hole 15 are arranged in the front-rear direction of the vehicle, and the axes of the third suspension mounting hole 24 and the fourth suspension mounting hole 25 are arranged in the left-right direction of the vehicle, that is, the driving motor and the auxiliary frame are fixed in multiple directions, which can further ensure the stress stability of the driving motor in multiple directions.

[0053] The through hole 22 can be arranged at one end of the longitudinal beam 2 close to the front cross beam, and the third suspension mounting hole 24 and the fourth suspension mounting hole 25 can be arranged at one end of the longitudinal beam 2 close to the rear cross beam, so that the first suspension mounting hole 14, the second suspension mounting hole 15, the third suspension mounting hole 24 and the fourth suspension mounting hole 25 can be arranged as dispersed as possible, the driving motor applies force to the auxiliary frame more evenly, the stability of the auxiliary frame is better, and the vibration noise is smaller, which is beneficial to improve the NVH performance of the auxiliary frame.

[0054] As shown in Figures 1-2 Optionally, the longitudinal beam 2 is convex upward, so that the size of the longitudinal beam 2 in the up-down direction is greater than that of the cross beam 1, and the third suspension mounting hole 24 or the fourth suspension mounting hole 25 is arranged at the middle of the longitudinal beam 2 in the up-down direction. The longitudinal beam 2 is convex upward, that is, the size of the longitudinal beam 2 in the Z direction is large, so that the longitudinal beam 2 has enough space in the up-down direction of the vehicle to arrange the third suspension mounting hole 24 and the fourth suspension mounting hole 25, that is, the third suspension mounting hole 24 or the fourth suspension mounting hole 25 can be located at the middle of the longitudinal beam 2 in the up-down direction, and the dynamic stiffness around the third suspension mounting hole 24 and the fourth suspension mounting hole 25 is ensured. In addition, the size of the longitudinal beam 2 in the up-down direction is large, so that the through hole 22 also has enough space to arrange.

[0055] As shown in Figures 1-2 Optionally, the longitudinal beam 2 is provided with a first control arm mounting hole 26, a second control arm mounting hole 27, a toe bar mounting hole 28 and a first sand leakage hole 29. The vehicle suspension system can include first control arms, second control arms, toe bars and other components, and the first control arm mounting hole 26, the second control arm mounting hole 27 and the toe bar mounting hole 28 are arranged on the longitudinal beam 2 to facilitate the installation of the first control arms, the second control arms and the toe bars.

[0056] The first sand leakage hole 29 can be arranged at a suitable position on the longitudinal beam 2, that is, the first sand leakage hole 29 can be located on any surface of the longitudinal beam 2, and multiple first sand leakage holes 29 can be arranged; the second sand leakage hole 16 can be arranged at a suitable position on the cross beam 1, that is, the second sand leakage hole 16 can be located on any surface of the cross beam 1, and multiple second sand leakage holes 16 can be arranged. The first sand leakage hole 29 and the second sand leakage hole 16 are in communication with the internal cavity of the auxiliary frame and can be used to discharge the sand core residues in the process of casting the auxiliary frame. Specifically, the auxiliary frame is integrally cast by a mold, the sand core is fixed in the mold, the metal liquid is poured into the mold to fill the space between the sand core and the mold, and after solidification after pouring, the mold is demolded and the auxiliary frame is washed by a high-pressure air gun or a water gun. The sand core in the auxiliary frame is discharged from the first sand leakage hole 29 and the second sand leakage hole 16, and the auxiliary frame can be rotated while being washed to quickly remove the sand core residues.

[0057] The utility model discloses a vehicle, including above-mentioned subframe. The vehicle has the same advantage with the above-mentioned subframe compared with the related art, and will not repeat explanation.

[0058] Although the utility model discloses as above, the protection scope of the utility model is not limited to this. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall into the protection scope of the utility model.

Claims

1. A subframe, characterized in that, It includes a crossbeam (1) and a longitudinal beam (2). The two crossbeams (1) are arranged opposite each other. Each crossbeam (1) has a body connecting part (11) at both ends. Two longitudinal beams (2) are arranged between the two crossbeams (1). Each longitudinal beam (2) is connected to the two crossbeams (1) at both ends. The two crossbeams (1) and the two longitudinal beams (2) form a frame structure. The frame structure is used to install a drive motor. Each connection between the crossbeam (1) and the longitudinal beam (2) is provided with a reinforcing structure (3).

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

3. The subframe according to claim 2, characterized in that, The reinforcing structure (3) is formed by protrusions on the inner walls of the crossbeam (1) and the longitudinal beam (2); And / or, at least one of the beams (1) is provided with a first reinforcing rib (12) inside; And / or, at least one of the longitudinal beams (2) is provided with a second reinforcing rib (21) inside.

4. The subframe according to claim 1, characterized in that, 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).

5. The subframe according to claim 4, characterized in that, The third reinforcing rib (112) includes an arc-shaped protrusion (1121) and reinforcing teeth (1122). The arc-shaped protrusion (1121) extends circumferentially along the connecting sleeve (111), and a plurality of reinforcing teeth (1122) are provided on both sides of the arc-shaped protrusion (1121) at intervals along the circumferential direction of the connecting sleeve (111).

6. The subframe according to claim 1, characterized in that, The two longitudinal beams (2) are spaced apart along the left and right direction of the vehicle. The two longitudinal beams (2) are respectively provided with through holes (22) for the corresponding wheel axles to pass through. The longitudinal beams (2) are provided with a fourth reinforcing rib (23) along the circumference of the through holes (22).

7. The subframe according to claim 1, characterized in that, Two crossbeams (1) are spaced apart along the front-rear direction of the vehicle. 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 arranged correspondingly.

8. The subframe according to claim 1, characterized in that, 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) is provided with a third mounting hole (24) for mounting a drive motor at one end near the rear crossbeam, and the other longitudinal beam (2) is provided with 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 along the longitudinal direction of the vehicle, and the axes of the third mounting hole (24) and the fourth mounting hole (25) are along the left-right direction of the vehicle.

9. The subframe according to claim 8, characterized in that, The longitudinal beam (2) rises upward toward the vehicle so that the dimension of the longitudinal beam (2) in the vertical direction is larger than that of the cross beam (1). The longitudinal beam (2) is provided with the third suspension mounting hole (24) or the fourth suspension mounting hole (25) in the middle of the vertical direction of the vehicle. And / or, the 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); And / or, the crossbeam (1) is provided with a second sand-draining hole (16).

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

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