Rear auxiliary frame and vehicle

Abstract

The utility model discloses a rear sub-frame and a vehicle. The rear sub-frame comprises at least one frame cross beam, at least one rear sub-frame and at least one rear sub-frame, the two vehicle frame longitudinal beams are distributed in the transverse direction of the vehicle at intervals, the at least one vehicle frame cross beam is connected between the two vehicle frame longitudinal beams, and at least part of each vehicle frame longitudinal beam is of an arch structure; wherein the arched structure is constructed to be arched upwards, so that an avoiding space is formed below the arched structure, and the avoiding space is used for avoiding a driving shaft of the electric drive assembly. According to the rear auxiliary frame disclosed by the embodiment of the utility model, the frame cross beam and the frame longitudinal beam are connected, so that the frame cross beam and the frame longitudinal beam can transmit and dissipate transverse force and longitudinal force together, the riding comfort of a vehicle can be improved, and the structural stability and the working reliability of the rear auxiliary frame can be improved; at least part of the frame longitudinal beam is constructed to be of the arch structure to form the avoiding space, interference between the frame longitudinal beam and the driving shaft of the electric drive assembly can be avoided, and therefore the working reliability of the frame longitudinal beam and the electric drive assembly can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle manufacturing technical field especially relates to a rear subframe and vehicle with the rear subframe. BACKGROUND

[0002] The rear subframe is an important component of the vehicle, which can bear the weight of the vehicle body and transmit force. The rear subframe includes a frame cross beam and a frame longitudinal beam. The frame longitudinal beam extends along the longitudinal direction of the vehicle. When the rear subframe is installed, the frame longitudinal beam is prone to interfere with the drive shaft of the electric drive assembly extending along the lateral direction of the vehicle, which needs to be improved. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art. To this end, the utility model provides a rear subframe. The rear subframe can transmit and dissipate lateral force and longitudinal force, improve the ride comfort of the vehicle, and avoid interference between the frame longitudinal beam and the drive shaft of the electric drive assembly, thereby improving the reliability of the frame longitudinal beam and the electric drive assembly, and improving user satisfaction.

[0004] According to the rear subframe of the utility model embodiment, the frame cross beam and the frame longitudinal beam are connected, so that the frame cross beam and the frame longitudinal beam can jointly transmit and dissipate lateral force and longitudinal force, improve the ride comfort of the vehicle, and improve the structural stability and reliability of the rear subframe. At least part of the frame longitudinal beam is configured as an arch-shaped structure to form an avoidance space, which can avoid interference between the frame longitudinal beam and the drive shaft of the electric drive assembly, thereby improving the reliability of the frame longitudinal beam and the electric drive assembly, and improving user satisfaction.

[0005] According to the rear subframe of the utility model embodiment, the frame cross beam and the frame longitudinal beam are connected, so that the frame cross beam and the frame longitudinal beam can jointly transmit and dissipate lateral force and longitudinal force, improve the ride comfort of the vehicle, and improve the structural stability and reliability of the rear subframe. At least part of the frame longitudinal beam is configured as an arch-shaped structure to form an avoidance space, which can avoid interference between the frame longitudinal beam and the drive shaft of the electric drive assembly, thereby improving the reliability of the frame longitudinal beam and the electric drive assembly, and improving user satisfaction.

[0006] According to the rear subframe of some embodiments of the utility model, the span of the avoidance space in the longitudinal direction of the vehicle is L1, and satisfies: 130mm≤L1≤150mm; and / or, the depth of the avoidance space in the vertical direction of the vehicle is H1, and satisfies: 75mm≤H1≤90mm.

[0007] According to the rear subframe of some embodiments of the utility model, the height difference between the highest point of the avoidance space and the lowest point of the front end of the frame longitudinal beam is L2, and satisfies: 125mm≤L2≤145mm.

[0008] According to the rear subframe of some embodiments of the utility model, the height of the arc structure along the vertical direction of the vehicle is H2, and 70mm≤H2≤80mm is met.

[0009] According to the rear subframe of some embodiments of the utility model, the two frame cross beams are distributed along the longitudinal direction of the vehicle, and the frame longitudinal beam and at least one of the frame cross beams are provided with motor suspension mounting points.

[0010] According to the rear subframe of some embodiments of the utility model, one of the two frame cross beams located at the front side is provided with a front motor suspension mounting point, the frame longitudinal beam is provided with a rear motor suspension mounting point, and the arc structure is located between the front motor suspension mounting point and the rear motor suspension mounting point.

[0011] According to the rear subframe of some embodiments of the utility model, the front motor suspension mounting point and the rear motor suspension mounting points of the two frame longitudinal beams are distributed in an isosceles triangle shape.

[0012] According to the rear subframe of some embodiments of the utility model, the arc structure is located between the front end and the middle part of the frame longitudinal beam, and / or the height of the middle part of the frame longitudinal beam along the vertical direction of the vehicle is H3, and 100mm≤H3≤110mm is met, and / or the height of the rear end of the frame longitudinal beam along the vertical direction of the vehicle is H4, and 80mm≤H4≤85mm is met.

[0013] According to the rear subframe of some embodiments of the utility model, the frame longitudinal beam comprises an inner plate part and an outer plate part, the inner plate part and the outer plate part are both configured in a groove shape, the inner plate part and the outer plate part are connected through buckling, and a part of the inner plate part and a part of the outer plate part jointly form the arc structure.

[0014] The utility model also provides a vehicle.

[0015] According to the vehicle of the utility model embodiment, the electric drive assembly is connected to the frame longitudinal beam and at least one of the frame cross beams through the motor suspension, and the drive shaft of the electric drive assembly penetrates the avoiding space.

[0016] The vehicle and the rear subframe have the same advantages as the prior art, which will not be repeated here.

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

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings of which:

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

[0020] Figure 2 is a left view of the rear subframe according to an embodiment of the present utility model;

[0021] Figure 3 is a top view of the rear subframe according to an embodiment of the present utility model.

[0022] Reference signs:

[0023] Rear subframe 100,

[0024] Frame cross beam 1,

[0025] Frame longitudinal beam 2, arch structure 21, avoidance space 22, inner plate part 23, outer plate part 24,

[0026] Motor suspension mounting point 3, front motor suspension mounting point 31, rear motor suspension mounting point 32,

[0027] Vehicle body front mounting point 4, vehicle body rear mounting point 5, control arm mounting bracket 6, sleeve 7. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as a limitation of the present utility model.

[0029] In the description of the present utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the features limited as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise stated, the meaning of "multiple" is two or more.

[0030] In the description of the utility model, it is explained that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or it can be detachable connection, or it can be integrally connected, it can be mechanical connection, or it can be electrical connection, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] Unless otherwise specified, the front-rear direction in the application is the longitudinal direction of the vehicle, that is, the X direction, the left-right direction is the lateral direction of the vehicle, that is, the Y direction, and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0032] The rear subframe 100 according to the utility model embodiment is described below. Figures 1-3 The rear subframe 100 according to the utility model embodiment is described below.

[0033] As shown in the figure, the rear subframe 100 according to one embodiment of the utility model comprises at least one frame cross beam 1 and two frame longitudinal beams 2. Figures 1-3 The two frame longitudinal beams 2 are spaced apart along the lateral direction of the vehicle, and the at least one frame cross beam 1 is connected between the two frame longitudinal beams 2.

[0034] The at least part of the frame longitudinal beam 2 is configured as an arch structure 21, wherein the arch structure 21 is configured to arch upwards to form an avoidance space 22 below the arch structure 21, and the avoidance space 22 is used to avoid the drive shaft of the electric drive assembly.

[0035] Specifically, the rear subframe 100 can be used to isolate the vibration and noise from the wheels and the road, avoid the direct transmission into the vehicle cabin, so as to improve the ride comfort of the vehicle, the rear subframe 100 includes a frame cross beam 1 and a frame longitudinal beam 2, wherein the frame cross beam 1 is configured to extend along the vehicle transversely, for transmitting and dissipating the transverse force, the frame longitudinal beam 2 is configured to extend along the vehicle longitudinally, for transmitting and dissipating the longitudinal force, and the frame cross beam 1 is at least one, that is, the number of frame cross beams 1 can be one, two or three, etc., so as to transmit the transverse force through at least one frame cross beam 1, improve the reliability of transmitting and dissipating the transverse force, the frame longitudinal beam 2 is two, that is, the longitudinal force can be transmitted through two frame longitudinal beams 2 together, so as to improve the reliability of transmitting and dissipating the longitudinal force, and the two frame longitudinal beams 2 are distributed along the vehicle transversely, that is, the two frame longitudinal beams 2 have a certain distance, so that the two frame longitudinal beams 2 can simultaneously transmit the longitudinal force from two different positions, which can further improve the efficiency and reliability of transmitting the longitudinal force, so as to quickly transmit and dissipate the longitudinal force.

[0036] It should be noted that the frame cross beam 1 and the frame longitudinal beam 2 can be configured as a pipe shape, so as to reduce the weight of the frame cross beam 1 and the frame longitudinal beam 2 under the premise of ensuring that the transverse force and the longitudinal force can be transmitted and dissipated respectively, that is, the overall weight of the rear subframe 100 can be reduced, which is beneficial to the installation of the rear subframe 100 on the vehicle.

[0037] And the at least one frame cross beam 1 is connected between the two frame longitudinal beams 2, that is, the two ends of the at least one frame cross beam 1 are connected with the two frame longitudinal beams 2 at the same time, so that the at least one frame cross beam 1 can form a basic frame structure of the rear subframe 100 together with the two frame longitudinal beams 2, and the frame cross beam 1 and the frame longitudinal beam 2 can be connected by welding, so that the rear subframe 100 is an integral whole, which can improve the structural stability and working reliability of the rear subframe 100, and the frame cross beam 1 and the frame longitudinal beam 2 can transmit and dissipate the transverse force and the longitudinal force together by connecting the frame cross beam 1 and the frame longitudinal beam 2, which can further improve the reliability and efficiency of transmitting and dissipating the transverse force and the longitudinal force, thereby effectively improving the ride comfort of the vehicle and improving user satisfaction.

[0038] At least part of the vehicle frame longitudinal beam 2 is configured as an arched structure 21, that is, part or all of the vehicle frame longitudinal beam 2 is configured as the arched structure 21, so that the vehicle frame longitudinal beam 2 can avoid the drive shaft of the electric drive assembly at the arched structure 21 by changing the shape of the vehicle frame longitudinal beam 2, to avoid interference between the vehicle frame longitudinal beam 2 and the drive shaft of the electric drive assembly, thereby reducing the reliability of the work of the two, and the arched structure 21 is configured to arch upwards, that is, the arched structure 21 is configured as a bridge to form an avoidance space 22 below the arched structure 21, which is used to avoid the drive shaft of the electric drive assembly, so as to avoid interference between the vehicle frame longitudinal beam 2 and the drive shaft of the electric drive assembly, thereby improving the reliability of the work of the vehicle frame longitudinal beam 2 and the electric drive assembly.

[0039] According to the rear subframe 100 of the embodiment of the utility model, the vehicle frame transverse beam 1 and the vehicle frame longitudinal beam 2 are connected, so that the vehicle frame transverse beam 1 and the vehicle frame longitudinal beam 2 can jointly transmit and dissipate the transverse force and the longitudinal force, the riding comfort of the vehicle can be improved, the structural stability and the reliability of the work of the rear subframe 100 can be improved, at least part of the vehicle frame longitudinal beam 2 is configured as an arched structure 21 to form an avoidance space 22, so that the vehicle frame longitudinal beam 2 and the drive shaft of the electric drive assembly can be avoided from interfering with each other, thereby improving the reliability of the work of the vehicle frame longitudinal beam 2 and the electric drive assembly, and user satisfaction can be improved.

[0040] In some embodiments, the avoidance space 22 has a span L1 in the vehicle longitudinal direction, and satisfies: 130mm≤L1≤150mm; and / or, the avoidance space 22 has a depth H1 in the vehicle vertical direction, and satisfies: 75mm≤H1≤90mm.

[0041] Specifically, the avoidance space 22 is used to avoid the drive shaft of the electric drive assembly, that is, the space size of the avoidance space 22 is configured to be slightly larger than the movement envelope of the drive shaft of the electric drive assembly, so as to ensure that the drive shaft of the electric drive assembly can keep a distance from the vehicle frame longitudinal beam 2 when moving to the maximum position in any direction, and the size of the arched structure 21 can be prevented from being too large due to the space size of the avoidance space 22 being too large, which is not conducive to the arrangement of the rear subframe 100 on the vehicle, so that the size of the rear subframe 100 can be reduced as much as possible under the premise of ensuring that the drive shaft of the electric drive assembly does not interfere with the vehicle frame longitudinal beam 2, thereby facilitating the arrangement of the rear subframe 100 on the vehicle.

[0042] Further, the span L1 of the avoidance space 22 in the vehicle longitudinal direction can be between 130 mm and 150 mm, i.e., L1 can be 135 mm, 141 mm, 145 mm, etc., so as to avoid that L1 is too large or too small. If L1 is too large, the distance between the drive shaft of the electric drive assembly and the vehicle longitudinal beam 2 when the drive shaft is moved to the maximum position in the vehicle longitudinal direction will be too large, which can ensure that the drive shaft of the electric drive assembly does not interfere with the vehicle longitudinal beam 2, but will cause space waste and result in that the size of the arch structure 21 is too large, which is not conducive to the arrangement of the rear subframe 100 on the vehicle. On the contrary, if L1 is too small, the drive shaft of the electric drive assembly will interfere with the vehicle longitudinal beam 2 when the drive shaft is moved in the vehicle longitudinal direction, which will reduce the reliability of the vehicle longitudinal beam 2 and the electric drive assembly.

[0043] It should be noted that the span of the avoidance space 22 in the vehicle vertical direction is the height difference between the highest point of the avoidance space 22 and the lowest point of the middle part of the vehicle longitudinal beam 2.

[0044] Meanwhile, the depth H1 of the avoidance space 22 in the vehicle vertical direction can be between 75 mm and 90 mm, i.e., H1 can be 78 mm, 82 mm, 86 mm, etc., so as to avoid that H1 is too large or too small. If H1 is too large, the distance between the drive shaft of the electric drive assembly and the vehicle longitudinal beam 2 when the drive shaft is moved to the maximum position in the vehicle vertical direction will be too large, which can ensure that the drive shaft of the electric drive assembly does not interfere with the vehicle longitudinal beam 2, but will cause space waste and result in that the size of the arch structure 21 is too large, which is not conducive to the arrangement of the rear subframe 100 on the vehicle. On the contrary, if H1 is too small, the drive shaft of the electric drive assembly will interfere with the vehicle longitudinal beam 2 when the drive shaft is moved in the vehicle vertical direction, which will reduce the reliability of the vehicle longitudinal beam 2 and the electric drive assembly.

[0045] It should be noted that the depth of the avoidance space 22 in the vehicle vertical direction is the height difference between the highest point of the avoidance space 22 and the lowest point of the middle part of the vehicle longitudinal beam 2.

[0046] Further, the distance between the drive shaft of the electric drive assembly in the static state and the highest point of the avoidance space 22 can be d, and d can be between 12 mm and 13.5 mm, i.e., d can be 12.5 mm, 12.7 mm, 13 mm, etc., so as to avoid that d is too large or too small, thereby ensuring that there is still a certain distance between the drive shaft of the electric drive assembly and the highest point of the avoidance space 22 when the drive shaft is moved to the maximum position in the vehicle vertical direction, so as to avoid that the drive shaft of the electric drive assembly interferes with the vehicle longitudinal beam 2 and to avoid space waste.

[0047] In some embodiments, the height difference between the highest point of the avoidance space 22 and the lowest point of the front end of the vehicle longitudinal beam 2 is L2, and satisfies: 125 mm≤L2≤145 mm.

[0048] Specifically, at least part of the vehicle frame longitudinal beam 2 is configured as an arched structure 21, the arched structure 21 is configured to arch upward relative to the vehicle frame longitudinal beam 2 to form an avoidance space 22 below the arched structure 21, and the front end of the vehicle frame longitudinal beam 2 is lower than the middle part of the vehicle frame longitudinal beam 2, that is, the height difference between the highest point of the avoidance space 22 and the front end of the vehicle frame longitudinal beam 2 is greater than the height difference between the highest point of the avoidance space 22 and the lowest point of the middle part of the vehicle frame longitudinal beam 2, that is, the height difference between the highest point of the avoidance space 22 and the lowest point of the front end of the vehicle frame longitudinal beam 2 is greater than the depth of the avoidance space 22 in the vertical direction of the vehicle, so as to facilitate the arrangement of the avoidance space 22.

[0049] Further, the height difference L2 between the highest point of the avoidance space 22 and the lowest point of the front end of the vehicle frame longitudinal beam 2 is between 125mm and 145mm, that is, L2 can be 130mm, 136mm or 140mm, etc., so as to avoid that L2 is too large or too small, too large will make the extension length of the vehicle frame longitudinal beam 2 in the vertical direction of the vehicle too large, which will cause the overall structure of the rear sub-frame 100 to be more complex and the weight to be larger, which is not conducive to the arrangement of the rear sub-frame 100, and will cause the transmission efficiency of the longitudinal force to be reduced, on the contrary, too small will cause the extension length of the vehicle frame longitudinal beam 2 in the vertical direction of the vehicle to be too small, which is not conducive to the arrangement of the avoidance space 22.

[0050] Therefore, by reasonably designing the height difference between the highest point of the avoidance space 22 and the lowest point of the front end of the vehicle frame longitudinal beam 2, the extension length of the vehicle frame longitudinal beam 2 in the vertical direction of the vehicle can be minimized under the premise of ensuring that the drive shaft of the electric drive assembly does not interfere with the vehicle frame longitudinal beam 2, so that the overall structure of the rear sub-frame 100 is relatively simple and the weight is smaller, which is conducive to the arrangement of the rear sub-frame 100 on the vehicle, and can be conducive to improving the transmission efficiency of the longitudinal force.

[0051] In some embodiments, the height of the arched structure 21 in the vertical direction of the vehicle is H2, and satisfies: 70mm≤H2≤80mm.

[0052] Specifically, at least part of the vehicle frame longitudinal beam 2 is configured as an arched structure 21, that is, the arched structure 21 as at least part of the vehicle frame longitudinal beam 2 can be used to bear the weight of the vehicle body, the height of the arched structure 21 in the vertical direction of the vehicle is the height difference between the highest point of the arched structure 21 in the vertical direction of the vehicle and the intersection of the vertical line passing through the highest point and the lowest point of the arched structure 21, which can represent the thickness of the arched structure 21, the height H2 of the arched structure 21 in the vertical direction of the vehicle can be between 70mm and 80mm, that is, H2 can be 72mm, 74mm or 76mm, etc., so as to avoid that H2 is too large or too small, too large will cause the size of the arched structure 21 to be too large, which will cause the size of the vehicle frame longitudinal beam 2 to be too large, which is not conducive to the lightweight and arrangement of the rear sub-frame 100 on the vehicle, too small will cause the bearing capacity of the arched structure 21 to the weight of the vehicle body to be reduced, which will cause the reliability of the vehicle frame longitudinal beam 2 to be reduced.

[0053] Therefore, the height of the arch structure 21 along the vertical direction of the vehicle can be reasonably designed to reduce the size of the frame longitudinal beam 2 as much as possible under the premise of ensuring the bearing capacity of the vehicle body weight, thereby facilitating the lightweight and installation of the rear subframe 100 on the vehicle, and the height of the arch structure 21 along the vertical direction of the vehicle can be flexibly set according to the modal, stiffness and durability of the rear subframe 100, etc.

[0054] In some embodiments, the two frame cross beams 1 are spaced apart along the longitudinal direction of the vehicle, and the frame longitudinal beam 2 and at least one of the frame cross beams 1 are provided with motor suspension mounting points 3.

[0055] Specifically, the frame cross beam 1 is used to transmit and dissipate the lateral force, and the two frame cross beams 1 are arranged, so that the lateral force can be transmitted by the two frame cross beams 1 together, thereby improving the reliability of transmitting and dissipating the lateral force, and the two frame cross beams 1 are spaced apart along the longitudinal direction of the vehicle, so that the two frame cross beams 1 can simultaneously transmit the lateral force from two different positions, thereby further improving the efficiency and reliability of transmitting the lateral force, so as to quickly transmit and dissipate the lateral force.

[0056] It should be noted that the two frame cross beams 1 are connected between the two frame longitudinal beams 2, so that the two frame cross beams 1 and the two frame longitudinal beams 2 together form the basic frame structure of the rear subframe 100, thereby improving the structural stability and working reliability of the rear subframe 100.

[0057] In addition, the motor suspension mounting points 3 are arranged on the frame longitudinal beam 2 and at least one of the frame cross beams 1, and the motor suspension mounting points 3 are used to mount the motor suspension, so that one motor suspension mounting point 3 is arranged on each of the two frame longitudinal beams 2, and the motor suspension mounting points 3 are arranged on one of the frame cross beams 1 or the two frame cross beams 1, that is, the number of the motor suspension mounting points 3 is at least three, so that the motor suspension can be mounted by the at least three motor suspension mounting points 3 together, thereby improving the reliability of mounting the motor suspension, and the at least three motor suspension mounting points 3 are spaced apart, so that the motor suspension can be mounted from at least three positions at the same time, thereby improving the stability of mounting the motor suspension.

[0058] It should be noted that the motor suspension can be connected to the motor suspension mounting point 3 by press fitting, and the motor suspension is used to connect the electric drive assembly to the rear subframe 100, so that the motor suspension is connected to the rear subframe 100 and the electric drive assembly at the same time, thereby achieving the installation of the electric drive assembly and ensuring the reliable working of the electric drive assembly, and the connection can be achieved by a connecting piece, so as to facilitate the installation or disassembly of each component, and the connecting piece can be a bolt, etc.

[0059] In some embodiments, one of the two frame cross beams 1 located at the front side is provided with a front motor suspension mounting point 31, the frame longitudinal beam 2 is provided with a rear motor suspension mounting point 32, and the arch-shaped structure 21 is located between the front motor suspension mounting point 31 and the rear motor suspension mounting point 32.

[0060] Specifically, the front motor suspension mounting point 31 is provided on one of the two frame cross beams 1 located at the front side, that is, the front motor suspension mounting point 31 is one, and the rear motor suspension mounting point 32 is two on the frame longitudinal beam 2. The installation of the motor suspension can be achieved by one front motor suspension mounting point 31 and two rear motor suspension mounting points 32, and the reliability and stability of the installation of the motor suspension can be improved. At least part of the motor suspension can be located between the front motor suspension mounting point 31 and the rear motor suspension mounting point 32, that is, at least part of the electric drive assembly connected with the motor suspension can also be located between the front motor suspension mounting point 31 and the rear motor suspension mounting point 32. The arch-shaped structure 21 is arranged between the front motor suspension mounting point 31 and the rear motor suspension mounting point 32, so that the avoidance space 22 located below the arch-shaped structure 21 is opposite to at least part of the electric drive assembly, so as to facilitate the driving shaft of the electric drive assembly to pass through the avoidance space 22, thereby avoiding the interference between the driving shaft of the electric drive assembly and the frame longitudinal beam 2, and ensuring the reliability of the work of the electric drive assembly and the frame longitudinal beam 2.

[0061] In some embodiments, the front motor suspension mounting point 31 and the two rear motor suspension mounting points 32 of the two frame longitudinal beams 2 are in isosceles triangle distribution.

[0062] Specifically, the front motor suspension mounting point 31 is arranged on one of the two frame cross beams 1 located at the front side, and the two rear motor suspension mounting points 32 are arranged on the two frame longitudinal beams 2, that is, the front motor suspension mounting point 31 and the two rear motor suspension mounting points 32 are distributed in a spaced manner. The front motor suspension mounting point 31 and the two rear motor suspension mounting points 32 are in isosceles triangle distribution, that is, the front motor suspension mounting point 31 is arranged at the middle part of the frame cross beam 1, and the two rear motor suspension mounting points 32 are symmetrically distributed relative to the front motor suspension mounting point 31. The three motor suspension mounting points 3 in isosceles triangle distribution can be used to install the motor suspension, which can reduce unnecessary displacement or deformation, that is, the reliable installation of the motor suspension can be achieved, and the reliability of the work of the motor suspension can be effectively improved.

[0063] In some embodiments, the arch-shaped structure 21 is located between the front end and the middle part of the frame longitudinal beam 2; and / or, the height of the middle part of the frame longitudinal beam 2 along the vertical direction of the vehicle is H3, and satisfies: 100mm≤H3≤110mm; and / or, the height of the rear end of the frame longitudinal beam 2 along the vertical direction of the vehicle is H4, and satisfies: 80mm≤H4≤85mm.

[0064] Specifically, the arc-shaped structure 21 is arranged between the front end and the middle part of the frame longitudinal beam 2, that is, part of the frame longitudinal beam 2 is configured as the arc-shaped structure 21, so as to reduce the manufacturing difficulty and reduce the height of the frame longitudinal beam 2 along the vertical direction of the vehicle, which is beneficial to the arrangement of the rear sub-frame 100 on the vehicle, as shown in Figure 2 The height H3 of the middle part of the frame longitudinal beam 2 along the vertical direction of the vehicle is between 100 mm and 110 mm, that is, H3 can be 104 mm, 106 mm or 108 mm, and the height H4 of the rear end of the frame longitudinal beam 2 along the vertical direction of the vehicle is between 80 mm and 85 mm, that is, H4 can be 82 mm, 83 mm or 84 mm, so as to avoid that the height of each part of the frame longitudinal beam 2 along the vertical direction of the vehicle is too large or too small. If the height is too large, the structure of the rear sub-frame 100 is complex and the weight is large, which is not conducive to the arrangement of the rear sub-frame 100. If the height is too small, the bearing capacity of the vehicle body weight is reduced. Therefore, the height of each part of the frame longitudinal beam 2 along the vertical direction of the vehicle can be reasonably designed to reduce the structural complexity and weight of the rear sub-frame 100 while ensuring the bearing capacity of the vehicle body.

[0065] It should be noted that the height of each part of the frame longitudinal beam 2 along the vertical direction of the vehicle is not the same, and the height of each part of the frame longitudinal beam 2 can be uniformly transitioned to reduce the possibility of fracture of the frame longitudinal beam 2 due to stress concentration.

[0066] As shown in Figure 3 The width D of the frame longitudinal beam 2 along the transverse direction of the vehicle can be between 90 mm and 110 mm, that is, D can be 95 mm, 100 mm or 115 mm, so as to avoid that D is too large or too small, thereby reducing the structural complexity and weight of the rear sub-frame 100 while ensuring the bearing capacity of the vehicle body weight. The width of the frame longitudinal beam 2 along the transverse direction of the vehicle can be flexibly set according to the welding strength and durability of each welded part, the modal and stiffness of the rear sub-frame 100, and other requirements.

[0067] In some embodiments, the frame longitudinal beam 2 includes an inner plate part 23 and an outer plate part 24, both of which are configured in a groove shape, and the inner plate part 23 and the outer plate part 24 are connected in a clamping manner. Part of the inner plate part 23 and part of the outer plate part 24 jointly form the arc-shaped structure 21.

[0068] Specifically, as shown in Figure 1 and Figure 3As shown, the frame longitudinal beam 2 comprises an inner plate part 23 and an outer plate part 24, the inner plate part 23 is close to the vehicle center, the outer plate part 24 is away from the vehicle center, the inner plate part 23 and the outer plate part 24 are distributed along the vehicle transverse direction, that is, the longitudinal force can be transmitted and dissipated through the inner plate part 23 and the outer plate part 24, and the inner plate part 23 and the outer plate part 24 are both configured as a groove shape, that is, the cross section of the inner plate part 23 and the outer plate part 24 is U-shaped, which can improve the structural strength of the inner plate part 23 and the outer plate part 24, and the inner plate part 23 and the outer plate part 24 are buckled and connected to form a whole, which can improve the structural strength and working reliability of the frame longitudinal beam 2, and the structural strength of the frame longitudinal beam 2 can be enhanced by increasing the thickness of the inner plate part 23 and the outer plate part 24.

[0069] Moreover, the frame longitudinal beam 2 comprises an inner plate part 23 and an outer plate part 24, and part of the frame longitudinal beam 2 is configured as an arch structure 21, that is, part of the inner plate part 23 and part of the outer plate part 24 are both configured to arch upward, so that part of the inner plate part 23 and part of the outer plate part 24 can jointly form the arch structure 21, and further, an avoiding space 22 can be formed below the arch structure 21 to avoid the drive shaft of the electric drive assembly, so as to avoid interference between the drive shaft of the electric drive assembly and the frame longitudinal beam 2.

[0070] It should be noted that the arch structure 21 can be formed by stamping, and the other parts of the frame longitudinal beam 2 can be formed integrally.

[0071] In addition, it should be noted that, as shown in the drawings, Figure 1 As shown, four control arm mounting brackets 6 are connected to each frame longitudinal beam 2 for fixing the control arm, the control arm mounting bracket 6 and the frame longitudinal beam 2 are welded to improve the connection reliability therebetween, the control arm is used to connect the vehicle body and the wheel to transmit the force borne by the wheel to the vehicle body for dispersion, thereby improving the ride comfort of the vehicle, and the vehicle body front mounting point 4 and the vehicle body rear mounting point 5 are respectively arranged at the front end and the rear end of the frame longitudinal beam 2, the vehicle body front mounting point 4 and the vehicle body rear mounting point 5 are respectively provided with a sleeve 7, the inner plate part 23 and the outer plate part 24 are welded to the sleeve 7 along the circumferential direction of the sleeve 7 to reliably fix the sleeve 7, and the sleeve 7 and the vehicle body are connected through a connecting piece, so as to realize the connection between the rear subframe 100 and the vehicle body.

[0072] The utility model also proposes a kind of vehicle.

[0073] According to the vehicle of the utility model embodiment, the electric drive assembly is connected to the frame longitudinal beam 2 and at least one frame transverse beam 1 through motor suspension, and the drive shaft of the electric drive assembly penetrates the avoiding space 22.

[0074] Specifically, the electric drive assembly is connected with the wheels through the drive shaft to drive the wheels, and the electric drive assembly is connected to the vehicle frame longitudinal beam 2 and at least one vehicle frame transverse beam 1 through the motor suspension, that is, the electric drive assembly is connected to two vehicle frame longitudinal beams 2 through the motor suspension and is connected to one or both vehicle frame transverse beams 1, the connection of the electric drive assembly and the rear subframe 100 can be realized, and the drive shaft of the electric drive assembly penetrates the avoidance space 22, that is, the electric drive assembly is arranged between the two vehicle frame longitudinal beams 2, so that the drive shaft of the electric drive assembly can pass through the avoidance space 22 below the two arch-shaped structures 21 formed by the two vehicle frame longitudinal beams 2 to be connected with the wheels, and then when the wheels vibrate, the vibration transmitted to the drive shaft of the electric drive assembly can be transmitted and dissipated through the rear subframe 100, so as to improve the ride comfort of the vehicle.

[0075] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A rear subframe characterized by, The application relates to a rear subframe of a vehicle. The rear subframe comprises: at least one cross beam; two longitudinal beams, the two longitudinal beams being spaced apart in the lateral direction of the vehicle, and the at least one cross beam being connected between the two longitudinal beams, at least a part of the longitudinal beams being configured as an arch-shaped structure; 2. The rear subframe according to claim 1, characterized in that, wherein the arch-shaped structure is configured to arch upwards to form an avoidance space below the arch-shaped structure, the avoidance space being used for avoiding a drive shaft of an electric drive assembly. The avoidance space has a span L1 in the longitudinal direction of the vehicle, and satisfies 130mm<=L1<=150mm; 3. The rear subframe according to claim 1, characterized in that, and / or, the avoidance space has a depth H1 in the vertical direction of the vehicle, and satisfies 75mm<=H1<=90mm.

4. The rear subframe according to claim 1, characterized by A height difference between a highest point of the avoidance space and a lowest point of a front end of the longitudinal beam satisfies 125mm<=L2<=145mm.

5. The rear subframe according to any one of claims 1-4, characterized in that, A height H2 of the arch-shaped structure in the vertical direction of the vehicle satisfies 70mm<=H2<=80mm.

6. The rear subframe according to claim 5, characterized in that The cross beams are two, and the two cross beams are spaced apart in the longitudinal direction of the vehicle, and the longitudinal beams and at least one of the cross beams are provided with motor suspension mounting points.

7. The rear subframe according to claim 6, characterized in that One of the cross beams on the front side of the two cross beams is provided with a front motor suspension mounting point, the longitudinal beam is provided with a rear motor suspension mounting point, and the arch-shaped structure is located between the front motor suspension mounting point and the rear motor suspension mounting point.

8. The rear subframe according to any one of claims 1-4, characterized in that, The front motor suspension mounting point and the rear motor suspension mounting points of the two longitudinal beams are in isosceles triangle distribution. The arch-shaped structure is located between the front end and the middle part of the longitudinal beam; and / or, a height H3 of the middle part of the longitudinal beam in the vertical direction of the vehicle satisfies 100mm<=H3<=110mm; 9. The rear subframe according to any one of claims 1-4, characterized in that, and / or, a height H4 of the rear end of the longitudinal beam in the vertical direction of the vehicle satisfies 80mm<=H4<=85mm.

10. A vehicle characterized by comprising: The longitudinal beam comprises an inner plate part and an outer plate part, the inner plate part and the outer plate part are both configured as a groove shape, the inner plate part and the outer plate part are connected in a clamping manner, and a part of the inner plate part and a part of the outer plate part jointly form the arch-shaped structure. The application further relates to an electric drive assembly and a rear subframe as claimed in any one of claims 1-9, the electric drive assembly being connected to the longitudinal beams and the at least one cross beam through motor suspension, and a drive shaft of the electric drive assembly penetrating the avoidance space.

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