CN119953461A - Rear subframe assembly and vehicle - Google Patents

Abstract

The present invention discloses a rear sub-frame assembly and a vehicle, comprising: a sub-frame, a front crossbeam and a rear crossbeam spaced along the longitudinal direction of the vehicle and respectively connected between two frame longitudinal beams to jointly define an electric drive accommodation space, at least a portion of each frame longitudinal beam is constructed as an arch structure, the arch structure arches upward to form an escape space below the arch structure, and the rear crossbeam is formed with a steering gear escape hole, the steering gear escape hole is used to escape the steering gear; an electric drive assembly, the electric drive assembly is installed at the electric drive accommodation space, and the electric drive assembly is connected to a drive shaft, and the drive shaft is passed from the escape space to the outside of the electric drive accommodation space. The rear sub-frame assembly of the embodiment of the present invention can improve the overall integration of the rear sub-frame assembly, thereby improving the lightweight of the whole vehicle, ensuring the vehicle endurance performance, improving the user experience, and improving the structural strength and durability of the sub-frame, thereby ensuring the safety of the rear sub-frame assembly, and having a wider range of applications.

Description

Rear subframe assembly and vehicle

Technical Field

The invention relates to the technical field of vehicle manufacturing, in particular to a rear auxiliary frame assembly and a vehicle with the rear auxiliary frame assembly.

Background

Along with the development of national economy and the continuous improvement of living standard, vehicles are more and more important in life and travel, and the cruising performance, safety performance and the like of the vehicles are important aspects of the vehicles in production and manufacture. The bottom of current vehicle is equipped with back sub vehicle frame assembly more, and back sub vehicle frame assembly is provided with the sub vehicle frame, and the sub vehicle frame can provide the mounting point to structures such as driving motor, but current sub vehicle frame's structural strength is lower, and the durability is relatively poor, leads to the safety in utilization of vehicle lower, and the sub vehicle frame occupation space is great, leads to the vehicle lightweight poor, influences vehicle duration, and then influences user's use experience, exists the improvement space.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the rear auxiliary frame assembly is high in integration level, the whole vehicle is light, the endurance performance of the vehicle is further guaranteed, the use experience of a user is improved, the structural strength and durability of the auxiliary frame are improved, and the use safety is guaranteed.

The rear auxiliary frame assembly comprises an auxiliary frame, an electric drive assembly and a driving assembly, wherein the auxiliary frame comprises a front cross beam, a rear cross beam and two frame longitudinal beams, the front cross beam and the rear cross beam are distributed along the longitudinal direction of a vehicle at intervals and are respectively connected between the two frame longitudinal beams to jointly define an electric drive accommodating space, at least part of each frame longitudinal beam is constructed into an arch structure, the arch structure arches upwards to form an avoidance space below the arch structure, a steering device avoidance hole is formed in the rear cross beam and is used for avoiding a steering device, the electric drive assembly is installed at the electric drive accommodating space, and the driving shaft is in power connection with the electric drive assembly and penetrates out of the electric drive accommodating space from the avoidance space.

According to the rear auxiliary frame assembly provided by the embodiment of the invention, the electric drive accommodating space, the avoidance space and the steering gear avoidance hole are arranged, so that the whole occupied space of the rear auxiliary frame assembly can be reduced, the whole integration level of the rear auxiliary frame assembly is improved, the whole vehicle is further light, the vehicle endurance performance is ensured, the use experience of a user is improved, at least part of each frame longitudinal beam is constructed into an arch structure, the structural strength and the durability of the auxiliary frame are improved, the use safety of the rear auxiliary frame assembly is further ensured, the use effect is better, and the application range is wider.

According to the rear auxiliary frame assembly of some embodiments of the invention, the steering gear avoiding hole penetrates through the rear cross beam along the front-rear direction, and at least part of the steering gear is arranged in the steering gear avoiding hole.

According to some embodiments of the present invention, the rear cross member is provided with a plurality of steering gear mounting points, the plurality of steering gear mounting points are used for mounting the steering gear, and the plurality of steering gear mounting points are distributed at intervals around the steering gear avoiding hole;

and/or the distance between the outer wall of the part of the steering gear arranged in the steering gear avoiding hole and the inner wall of the steering gear avoiding hole is set as A, and the condition that A is more than or equal to 4mm and less than or equal to 6mm is satisfied.

According to the rear auxiliary frame assembly of some embodiments of the present invention, at least part of the steering gear is located at the rear side of the rear cross beam, an avoidance groove is formed in the rear side wall of the rear cross beam, the avoidance groove is transversely communicated with the steering gear avoidance hole along the vehicle, the steering gear is provided with a steering gear yoke, and the avoidance groove is used for avoiding the steering gear yoke.

According to the rear auxiliary frame assembly, two avoidance grooves are formed, the two avoidance grooves are respectively communicated with two sides of the avoidance hole of the steering gear along the transverse direction of the vehicle, the two avoidance grooves are both arc-shaped grooves, the radiuses of the two avoidance grooves are respectively R1 and R2, and the requirements that R1 is more than or equal to 30mm and less than or equal to 40mm, R2 is more than or equal to 40mm and less than or equal to 50mm are met.

According to the rear auxiliary frame assembly, the width of the steering gear avoiding hole is set to be D1, and the requirements that D1 is more than or equal to 270mm and less than or equal to 280mm are met;

And/or the maximum distance between the upper wall and the lower wall of the steering gear avoiding hole is set to be D2, and the requirement that the D2 is more than or equal to 140mm and less than or equal to 150mm is met;

And/or the minimum distance between the upper wall and the lower wall of the steering gear avoiding hole is set to be D3, and the minimum distance is more than or equal to 110mm and less than or equal to 130mm.

According to the rear auxiliary frame assembly of some embodiments of the invention, the thickness of the rear cross beam along the front-rear direction of the vehicle is set to be D4, and the thickness is 60 mm-80 mm-D4;

And/or the maximum height of the rear cross beam is set to be D5, and the condition that the D5 is more than or equal to 220mm and less than or equal to 240mm is satisfied.

According to the rear auxiliary frame assembly provided by some embodiments of the invention, one end of the rear cross beam is further provided with an avoidance opening, and the avoidance opening is suitable for being communicated in the front-rear direction and is used for avoiding an exhaust pipe of an engine.

According to the rear auxiliary frame assembly provided by some embodiments of the invention, the avoidance opening is opened downwards, the distance between the upper wall of the avoidance opening and the upper wall of the rear cross beam is set to be D6, and the requirements that D6 is more than or equal to 160mm and less than or equal to 180mm are met;

And/or, the rear cross member is configured to be integrally formed.

According to the rear auxiliary frame assembly of some embodiments of the present invention, the electric drive assembly is in power connection with two driving shafts, the two driving shafts extend in the transverse direction of the vehicle, and the two driving shafts respectively penetrate through the avoidance spaces of the two frame longitudinal beams in a one-to-one correspondence manner.

According to some embodiments of the present invention, the front cross member is provided with a front electrically driven suspension mounting point, each of the frame rails is provided with a rear electrically driven suspension mounting point, the arch structure is located between the rear electrically driven suspension mounting point and the front cross member, and the front electrically driven suspension mounting point and the rear electrically driven suspension mounting points of the two frame rails are used for mounting the electrically driven assembly.

According to the rear subframe assembly of some embodiments of the present invention, the rear electrically driven suspension mounting points of the two frame rails are opposite in the transverse direction of the vehicle, and the front electrically driven suspension mounting points and the rear electrically driven suspension mounting points of the two frame rails are distributed in an isosceles triangle.

According to some embodiments of the invention, the rear subframe assembly further includes a rear electrically driven suspension mounting point spaced from the rear cross member by a distance less than a distance between the rear electrically driven suspension mounting point and the front cross member.

According to the rear auxiliary frame assembly of some embodiments of the invention, the distance between the top of the driving shaft and the inner top wall of the avoidance space is L1, and the distance is more than or equal to 10mm and less than or equal to L1 and less than or equal to 15mm.

According to the rear auxiliary frame assembly of some embodiments of the invention, the front end of the frame longitudinal beam is provided with a front vehicle body mounting part, and the rear end of the frame longitudinal beam is provided with a rear vehicle body mounting part;

The distance between the center of the driving shaft and the front vehicle body mounting part is L2, and is 310 mm-330 mm, and the distance between the center of the driving shaft and the rear vehicle body mounting part is L3, and is 460 mm-480 mm.

According to some embodiments of the present invention, the arch is located between the front body mount and the middle of the frame rail, and the bottom surface of the front body mount and the bottom surface of the middle of the frame rail are both lower than the bottom surface of the rear end of the rear body mount.

According to the rear auxiliary frame assembly of some embodiments of the invention, the height difference L4 between the front vehicle body mounting part and the rear vehicle body mounting part is 100 mm-120 mm;

And/or the distance between the front vehicle body mounting part and the rear vehicle body mounting part is d1, and the distance is 780 mm-d 1-800 mm.

According to the rear auxiliary frame assembly, the inner wall surface of the avoidance space comprises a front wall surface and a rear wall surface, and the front wall surface and the rear wall surface are connected with the inner vertex of the avoidance space;

Wherein the extension length of the front wall surface is longer than the extension length of the rear wall surface.

According to some embodiments of the present invention, the electric drive accommodation space includes a front accommodation space and a rear accommodation space, the front accommodation space is communicated with a front side of the rear accommodation space, the front accommodation space is formed between front rail sections of the two frame rails, the rear accommodation space is formed between rear rail sections of the two frame rails, the electric drive assembly includes a speed reducer and a driving motor, the front accommodation space is used for accommodating the speed reducer and the driving shaft, the avoidance space is communicated with the front accommodation space, and the rear accommodation space is used for accommodating the driving motor.

According to a rear subframe assembly of some embodiments of the present invention, the frame rail includes an inner plate portion and an outer plate portion, each of the inner plate portion and the outer plate portion is configured in a groove shape, the inner plate portion and the outer plate portion are snap-fitted, and a portion of the inner plate portion and a portion of the outer plate portion together form the arch structure.

According to the rear auxiliary frame assembly of some embodiments of the invention, 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 L6, and the height difference is 125mm < L6 < 145mm;

and/or the height of the arch structure along the vertical direction of the vehicle is H1, and the height is 70mm or more and is 80mm or less.

The invention further provides a vehicle.

A vehicle according to an embodiment of the present invention includes a rear subframe assembly as described in any of the above.

The vehicle and the rear subframe assembly have the same advantages as compared with the prior art, and are not described in detail herein.

Additional aspects and advantages of the invention 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 the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a subframe according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a subframe according to an embodiment of the present invention;

FIG. 3 is a schematic view of a subframe according to an embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of a subframe according to an embodiment of the invention;

FIG. 5 is a schematic structural view of a subframe according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a subframe according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a subframe according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a rear subframe assembly according to an embodiment of the present invention.

Reference numerals:

A rear subframe assembly 1000, a subframe 100, an electric drive assembly 101, a drive shaft 102, a steering gear 103, a steering gear yoke 1031,

A front beam 1, a front electric drive suspension mounting point 11,

Rear cross beam 2, steering gear avoiding hole 21, steering gear mounting point 22, avoiding groove 23, avoiding notch 24, front beam adjusting avoiding hole 25,

Frame rail 3, inner plate portion 31, outer plate portion 32, rear electric drive suspension mounting point 33, front body mounting portion 34, rear body mounting portion 35, front upper arm mounting bracket 40, front upper arm mounting portion 401, front lower arm mounting bracket 41, front lower arm mounting portion 411, rear upper arm mounting bracket 42, rear upper arm mounting portion 421, rear lower arm mounting bracket 43, plate 431, reinforcement plate 432, rear lower arm mounting portion 433, arch 5, avoiding space 51, front wall surface 52, rear wall surface 53,

The electric drive accommodation space 6, the front accommodation space 61, and the rear accommodation space 62.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

If not specified, the front-rear direction in the application is the longitudinal direction of the vehicle, namely the X direction, the left-right direction is the transverse direction of the vehicle, namely the Y direction, and the up-down direction is the vertical direction of the vehicle, namely the Z direction.

The following describes a rear subframe assembly 1000 according to an embodiment of the present invention with reference to fig. 1 to 8, which has a high integration level, and can improve the light weight of the whole vehicle, further ensure the cruising performance of the vehicle, improve the use experience of the user, and improve the structural strength and durability of the subframe 100, and ensure the use safety.

As shown in fig. 1-8, a rear subframe assembly 1000 according to one embodiment of the present invention includes a subframe 100 and an electric drive assembly 101.

The auxiliary frame 100 comprises a front cross beam 1, a rear cross beam 2 and two frame longitudinal beams 3, wherein the front cross beam 1 and the rear cross beam 2 are distributed at intervals in the longitudinal direction of the vehicle and are respectively connected between the two frame longitudinal beams 3 to jointly define an electric driving accommodating space 6, at least part of each frame longitudinal beam 3 is constructed into an arch structure 5, the arch structure 5 arches upwards to form an avoidance space 51 below the arch structure 5, the rear cross beam 2 is provided with a steering gear avoidance hole 21, the steering gear avoidance hole 21 is used for avoiding a steering gear 103, the electric driving assembly 101 is arranged at the electric driving accommodating space 6, the electric driving assembly 101 is in power connection with a driving shaft 102, and the driving shaft 102 penetrates out of the electric driving accommodating space 6 from the avoidance space 51.

Specifically, the rear subframe assembly 1000 is provided with a subframe 100, the subframe 100 is a skeleton of a front axle and a rear axle, that is, the subframe 100 is a component part of the front axle and the rear axle, the subframe 100 is an intermediate part for connecting a suspension system and a vehicle body, the axle, the suspension system and the like can be connected with the main frame through the subframe 100, the subframe 100 can block vibration and noise, and the vibration and the noise can be reduced to directly enter a carriage, so that the comfort and the operability of the vehicle are improved, the universality of suspension can be improved, the research and development cost and the assembly cost are reduced, and a foundation is provided for a large-scale production effect.

The auxiliary frame 100 is provided with a front cross beam 1, a rear cross beam 2 and two frame longitudinal beams 3, the front cross beam 1 and the rear cross beam 2 are all arranged along the transverse extension of the vehicle, the front cross beam 1 and the rear cross beam 2 are distributed along the longitudinal interval of the vehicle, the front cross beam 1 is positioned on the front side of the rear cross beam 2, the two frame longitudinal beams 3 are all arranged along the longitudinal extension of the vehicle, the two frame longitudinal beams 3 are distributed along the transverse interval of the vehicle, two ends of the front cross beam 1 are respectively connected with the two frame longitudinal beams 3 in a welding mode and the like, two ends of the rear cross beam 2 are also respectively connected with the two frame longitudinal beams 3 in a welding mode and the like, and further the front cross beam 1, the rear cross beam 2 and the two frame longitudinal beams 3 can jointly define an electric drive accommodating space 6, the rear auxiliary frame assembly 1000 is further provided with an electric drive assembly 101, the electric drive assembly 101 can provide running power for wheels, the electric drive assembly 101 can be installed at the electric drive accommodating space 6 to improve the integration level of the rear auxiliary frame assembly 1000, and the space at the auxiliary frame 100 is fully utilized.

Further, at least part of each frame rail 3 is configured as an arch structure 5, so that part of each frame rail 3 can be configured as an arch structure 5, and the whole of each frame rail 3 can be configured as an arch structure 5, in this embodiment, part of each frame rail 3 is configured as an arch structure 5, and the arch structures 5 of two frame rails 3 are opposite to each other in the transverse direction of the vehicle, so as to ensure that the performances of the left side and the right side of the vehicle are the same, the arch structures 5 can arch upwards, so that the conduction direction can be changed when the acting force is conducted to the frame rail 3, the effect of the acting force can be weakened, the structural strength of each frame rail 3 is ensured, and the durability of each frame rail 3 is improved, so as to improve the use safety.

In addition, the arch structure 5 arches upwards for the space 51 is dodged in the below formation of arch structure 5, and the both sides of electricity drive assembly 101 are respectively power connection has drive shaft 102, and drive shaft 102 can link to each other with the wheel power, so that electricity drive assembly 101 can drive the wheel rotation, and the wheel is located two frame longerons 3 along the outside of vehicle transverse direction, and drive shaft 102 can wear to establish outside the electricity drive accommodation space 6 from dodging space 51 department, and then makes electricity drive assembly 101 can drive the wheel in the electricity drive accommodation space 6, improves space utilization, and can guarantee vehicle operational reliability.

And the rear auxiliary frame assembly 1000 still is provided with the steering gear 103, steering gear 103 can control the wheel to adjust the vehicle direction of travel, steering gear 103 mountable in the rear cross beam 2 department of vehicle, and rear cross beam 2 is provided with steering gear and dodges hole 21, steering gear dodges hole 21 can be used to dodge steering gear 103, and then reducible steering gear 103 occupation space, in order to further improve the integrated level of rear auxiliary frame assembly 1000, and set up steering gear at rear cross beam 2 and dodge hole 21, can reduce the weight of rear cross beam 2, improve the lightweight, guarantee vehicle duration, improve user experience.

According to the rear subframe assembly 1000 of the embodiment of the invention, the whole occupied space of the rear subframe assembly 1000 can be reduced by arranging the electric drive accommodating space 6, the avoiding space 51 and the steering gear avoiding hole 21, so that the whole integration level of the rear subframe assembly 1000 is improved, the whole vehicle is further improved in light weight, the vehicle endurance performance is ensured, the use experience of a user is improved, at least part of each frame longitudinal beam 3 is constructed into the arch structure 5, the structural strength and the durability of the subframe 100 are improved, the use safety of the rear subframe assembly 1000 is further ensured, the use effect is better, and the application range is wider.

In some embodiments, the diverter relief hole 21 extends through the rear cross member 2 in a fore-aft direction, with at least a portion of the diverter 103 disposed within the diverter relief hole 21.

Specifically, the rear cross beam 2 is provided with a steering gear avoiding hole 21, which can be used for avoiding the steering gear 103, and as shown in fig. 1-5, the steering gear avoiding hole 21 is formed to penetrate the rear cross beam 2 along the front-rear direction, that is, the steering gear avoiding hole 21 extends along the front-rear direction, the front end of the steering gear avoiding hole 21 can be communicated with the electric drive accommodating space 6, the rear end of the steering gear avoiding hole 21 can be communicated with the rear space of the auxiliary frame 100, at least part of the steering gear 103 is arranged in the steering gear avoiding hole 21, so that only part of the steering gear 103 can be arranged in the steering gear avoiding hole 21, and the whole steering gear 103 can be arranged in the steering gear avoiding hole 21, in the embodiment, only part of the steering gear 103 is arranged in the steering gear avoiding hole 21.

So, make the steering gear 103 along the partial place steering gear of vehicle fore-and-aft direction dodge in the hole 21, and then can shorten the space that back sub vehicle frame assembly 1000 occupy along the vehicle fore-and-aft direction to improve the integrated level of back sub vehicle frame assembly 1000, and set up steering gear at rear cross beam 2 and dodge the hole 21, reducible rear cross beam 2's quality, and then can reduce the whole weight of sub vehicle frame 100, in order to improve the lightweight of vehicle, lengthen the vehicle continuation of journey, prop up high user and use experience.

In some embodiments, the rear cross member 2 is provided with a plurality of deflector mounting points 22, the plurality of deflector mounting points 22 are for mounting the deflector 103, and the plurality of deflector mounting points 22 are spaced apart around the deflector avoiding aperture 21.

Specifically, the steering gear 103 can be mounted on the rear cross beam 2, at least part of the steering gear 103 can be placed in the steering gear avoiding hole 21 of the rear cross beam 2, as shown in fig. 1, the rear cross beam 2 is further provided with a steering gear mounting point 22, the steering gear mounting point 22 can be set into a threaded pipe, the steering gear 103 can be connected with the steering gear mounting point 22 through bolts, the mounting is convenient, the steering gear 103 is connected with the rear cross beam 2 through bolts, the steering gear 103 can be detached relative to the rear cross beam 2, further later maintenance and the like are facilitated, and maintenance time is saved.

In addition, the steering gear mounting points 22 are arranged in a plurality, namely, the steering gear mounting points 22 can be arranged in two, three or four, and the like, in the embodiment, the steering gear mounting points 22 are arranged in four, the steering gear mounting points 22 are all used for mounting the steering gear 103, the mounting reliability of the steering gear 103 can be improved, the steering gear mounting points 22 are distributed at intervals around the steering gear avoiding holes 21, when part of the steering gear 103 is arranged in the steering gear avoiding holes 21, a plurality of parts of the peripheral wall of the steering gear 103 can be connected with the rear cross beam 2, and then the acting force generated by the steering gear 103 can be conducted to the rear cross beam 2 through bolts positioned in different directions, so that the acting force can be dispersed to the steering gear mounting points 22, the acting effect can be weakened, the service life can be prolonged, and the use reliability can be ensured.

In other embodiments, the distance between the outer wall of the portion of the deflector 103 placed in the deflector avoiding hole 21 and the inner wall of the deflector avoiding hole 21 is set to A, and it is satisfied that 4 mm.ltoreq.A.ltoreq.6 mm.

Specifically, when the deflector 103 is mounted on the rear cross member2, a portion of the deflector 103 may be disposed in the deflector avoiding hole 21, and as shown in fig. 4, a space may be provided between an outer wall of the portion of the deflector 103 disposed in the deflector avoiding hole 21 and an inner wall of the deflector avoiding hole 21, the space may be set to be a, and it is satisfied that 4 mm.ltoreq.a.ltoreq.6 mm, that is, a space a between an outer wall of the portion of the deflector 103 disposed in the deflector avoiding hole 21 and an inner wall of the deflector avoiding hole 21 may be set to be 4mm, 4.5mm, 5mm, 5.5mm, 6mm, or the like, preferably, in this embodiment, a space a between an outer wall of the portion of the deflector 103 disposed in the deflector avoiding hole 21 and an inner wall of the deflector avoiding hole 21 is set to be 5mm.

In this way, the distance A between the outer wall of the part of the steering gear 103 arranged in the steering gear avoiding hole 21 and the inner wall of the steering gear avoiding hole 21 is set to be 4mm less than or equal to 6mm, interference of the steering gear avoiding hole 21 to the movement of the steering gear 103 can be avoided, the operation reliability of the steering gear 103 can be ensured, the overlarge steering gear avoiding hole 21 can be avoided, the structural strength of the rear cross beam 2 is influenced, the use reliability of the rear cross beam 2 is ensured, the durability of the rear cross beam 2 is ensured, and the use safety is improved.

In some embodiments, at least part of the steering gear 103 is located at the rear side of the rear cross beam 2, the rear side wall of the rear cross beam 2 is formed with an avoidance groove 23, the avoidance groove 23 is transversely communicated with the steering gear avoidance hole 21 along the vehicle, the steering gear 103 is provided with a steering gear fork 1031, and the avoidance groove 23 is used for avoiding the steering gear fork 1031.

Specifically, the steering gear 103 is mounted on the rear cross member 2, and as shown in fig. 4 and 8, at least a portion of the steering gear 103 is disposed at the rear side of the rear cross member 2, so that only a portion of the steering gear 103 may be disposed at the rear side of the rear cross member 2, or the entire steering gear 103 may be disposed at the rear side of the rear cross member 2, in this embodiment, the rear portion of the steering gear 103 is located at the rear side of the rear cross member 2, and the front portion of the steering gear 103 may be disposed in the steering gear avoiding hole 21, so that the overall size of the rear subframe assembly 1000 in the front-rear direction of the vehicle may be shortened, thereby improving the integration level and reducing the weight.

Further, the rear side wall of the rear cross beam 2 is formed with the avoidance groove 23, the avoidance groove 23 is recessed forward along the front-rear direction of the vehicle in the rear side wall of the rear cross beam 2, the avoidance groove 23 is opened towards the rear side of the vehicle, the rear part of the steering gear 103 is located at the rear side of the rear cross beam 2, namely the avoidance groove 23 is opened towards the steering gear 103, the steering gear 103 is provided with the steering gear fork 1031, the steering gear fork 1031 is arranged at one side of the steering gear 103, the avoidance groove 23 is communicated with the steering gear avoidance hole 21 along the transverse direction of the vehicle, the avoidance groove 23 is used for avoiding the steering gear fork 1031, namely the front part of the steering gear fork 1031 can be arranged in the avoidance groove 23, the front part of the steering gear 103 can be arranged in the steering gear avoidance hole 21, interference of the steering gear avoidance hole 21 to the motion of the steering gear 103 can be avoided, and interference of the rear side wall of the rear cross beam 2 to the steering gear fork 1031 can be avoided, so that the running reliability of the steering gear 103 can be ensured.

In some embodiments, two avoidance grooves 23 are arranged, the two avoidance grooves 23 are respectively communicated with two sides of the steering gear avoidance hole 21 along the transverse direction of the vehicle, the two avoidance grooves 23 are both arc-shaped grooves, the radiuses of the two avoidance grooves 23 are respectively R1 and R2, and the requirements that R1 is more than or equal to 30mm and less than or equal to 40mm, R2 is more than or equal to 40mm and less than or equal to 50mm are met.

Specifically, the steering gear 103 is provided with two steering gear yoke 1031, the two steering gear yoke 1031 are symmetrically connected to two sides of the steering gear 103, and extend to two sides of the steering gear 103 along the transverse direction respectively, the steering gear yoke 1031 can be connected with a ball pin and a tie rod of a vehicle to transmit steering torque into a wheel hub so as to deflect the wheels, and the two steering gear yoke 1031 can be respectively connected with the wheel hub power on two sides of the vehicle so as to control the two wheels to deflect simultaneously, so that the use reliability is ensured.

Further, as shown in fig. 1 and 3, two avoidance grooves 23 are provided, the two avoidance grooves 23 are respectively communicated with two sides of the steering gear avoidance hole 21 along the transverse direction of the vehicle, so that at least part of the front parts of the two steering gear fork 1031 can be placed in the corresponding avoidance grooves 23, the overall size of the rear subframe assembly 1000 along the front-rear direction is shortened, the weight is improved, the steering gear fork 1031 is in a cylindrical structure, the avoidance grooves 23 can be correspondingly constructed into arc grooves, and the avoidance reliability of the steering gear fork 1031 is ensured.

In addition, the radii of the two avoidance grooves 23 are respectively set to be R1 and R2, in this embodiment, as shown in fig. 3, R1 is the radius of the avoidance groove 23 on the left side, R2 is the radius of the avoidance groove 23 on the right side, and it is satisfied that 30mm R1 is less than or equal to 40mm,40mm is less than or equal to R2 is less than or equal to 50mm, that is, the radius R1 of the avoidance groove 23 on the left side may be set to 30mm, 32.5mm, 35mm, 37.5mm, 40mm, etc., the radius R2 of the avoidance groove 23 on the right side may be set to 40mm, 42.5mm, 45mm, 47.5mm, 50mm, etc., preferably, in this embodiment, the radius R1 of the avoidance groove 23 on the left side is set to 34.3mm, and the radius R2 of the avoidance groove 23 on the right side is set to 47.062mm, so that interference of the rear side wall of the rear cross beam 2 on the movement of the steering gear fork 1031 can be avoided, so as to ensure the reliability of the operation of the steering gear 103.

In some embodiments, the width of the diverter escape hole 21 is set to D1 and satisfies 270 mm.ltoreq.D1.ltoreq.280 mm.

Specifically, the rear cross beam 2 is provided with a steering gear avoiding hole 21, a part of the steering gear 103 can be arranged in the steering gear avoiding hole 21, and as shown in fig. 3, the width of the steering gear avoiding hole 21 can be set to be D1, and the condition that 270mm is less than or equal to D1 is less than or equal to 280mm is satisfied, namely, the width D1 of the steering gear avoiding hole 21 can be set to be 270mm, 272.5mm, 275mm, 277.5mm or 280mm, and the like, preferably, in the embodiment, the width D1 of the steering gear avoiding hole 21 can be set to be 275.5mm, the width D1 of the steering gear avoiding hole 21 is set to be satisfied, and the condition that a gap exists between the steering gear 103 and the inner wall of the steering gear avoiding hole 21 in the width direction can be ensured, so that the steering gear avoiding hole 21 interferes with the movement of the steering gear 103 in the transverse direction can be avoided, the operation reliability of the steering gear 103 can be ensured, the width of the steering gear avoiding hole 21 is prevented from being too large, the structural strength of the rear cross beam 2 is influenced, the use reliability of the rear cross beam 2 is ensured, the durability of the rear cross beam 2 is ensured, and the use safety is improved.

In other embodiments, the maximum distance between the upper wall and the lower wall of the deflector avoiding hole 21 is set to D2, and 140 mm.ltoreq.D2.ltoreq.150 mm is satisfied.

Specifically, as shown in FIGS. 1 to 3, the deflector avoiding hole 21 is provided in the rear cross member 2 and penetrates the rear cross member 2 in the front-rear direction of the vehicle, the deflector avoiding hole 21 may be provided as a shaped hole to avoid each portion of the deflector 103, the maximum distance between the upper wall and the lower wall of the deflector avoiding hole 21 is set to D2, and the maximum distance D2 between the upper wall and the lower wall of the deflector avoiding hole 21 is set to satisfy that 140 mm.ltoreq.D2.ltoreq.150 mm, that is, the maximum distance D2 between the upper wall and the lower wall of the deflector avoiding hole 21 may be set to 140mm, 142.5mm, 145mm, 147.5mm or 150mm, etc., preferably, in this embodiment, the maximum distance D2 between the upper wall and the lower wall of the deflector avoiding hole 21 may be set to 145.5mm.

In other embodiments, the minimum distance between the upper wall and the lower wall of the deflector avoiding hole 21 is set to D3, and 110 mm.ltoreq.D3.ltoreq.130 mm is satisfied.

Specifically, the minimum distance between the upper wall and the lower wall of the deflector avoiding hole 21 is set to D3, and the minimum distance D3 between the upper wall and the lower wall of the deflector avoiding hole 21 is set to be 110 mm.ltoreq.D3.ltoreq.130 mm, that is, the minimum distance D3 between the upper wall and the lower wall of the deflector avoiding hole 21 may be set to 110mm, 112.5mm, 115mm, 117.5mm, 120mm, 122.5mm, 125mm, 127.5mm, 130mm, etc., preferably, in this embodiment, the minimum distance D3 between the upper wall and the lower wall of the deflector avoiding hole 21 may be set to 117.122mm.

In this way, the maximum distance D2 between the upper wall and the lower wall of the steering gear avoiding hole 21 is set to be 140mm less than or equal to D2 less than or equal to 150mm, the minimum distance D3 between the upper wall and the lower wall of the steering gear avoiding hole 21 is set to be 110mm less than or equal to D3 less than or equal to 130mm, a gap is reserved between the upper wall of the steering gear avoiding hole 21 and the upper wall of the steering gear 103, and a gap is reserved between the lower wall of the steering gear avoiding hole 21 and the lower wall of the steering gear 103, so that interference of the steering gear avoiding hole 21 on the steering gear 103 in the vertical direction can be avoided, the running reliability of the steering gear 103 can be ensured, the overlarge height of the steering gear avoiding hole 21 can be avoided, the structural strength of the rear cross beam 2 is influenced, the use reliability of the rear cross beam 2 is ensured, the durability of the rear cross beam 2 is ensured, and the use safety is improved.

In some embodiments, the thickness of the rear cross member 2 in the front-rear direction of the vehicle is set to D4, and 60 mm.ltoreq.D4.ltoreq.80 mm is satisfied.

Specifically, the rear cross member 2 is provided on the rear side of the sub-frame 100 with both ends respectively connected to the two frame rails 3, the rear cross member 2 is provided with a steering gear avoiding hole 21, as shown in FIG. 2, the thickness of the rear cross member 2 in the front-rear direction of the vehicle is set to be D4, and it is satisfied that 60 mm.ltoreq.D4.ltoreq.80 mm, that is, the thickness D4 of the rear cross member 2 in the front-rear direction of the vehicle may be set to be 60mm, 63mm, 66mm, 69mm, 72mm, 75mm, 78mm, 80mm or the like, and preferably, in this embodiment, the thickness D4 of the rear cross member 2 in the front-rear direction of the vehicle may be set to be 69mm, that is, the hole depth of the steering gear avoiding hole 21 may be set to be 60mm or more and 80mm or less.

In this way, the structural strength of the rear cross beam 2 can be ensured, the durability of the rear side of the auxiliary frame 100 can be improved, and the space in the steering gear avoiding hole 21 can be increased, so that the volume for accommodating the steering gear 103 can be increased, the integration level of the rear auxiliary frame assembly 1000 can be improved, the light weight of the whole vehicle can be improved, and the cruising performance of the vehicle can be improved.

In other embodiments, the maximum height of the rear cross member 2 is set to D5, and 220 mm.ltoreq.D5.ltoreq.240 mm is satisfied.

Specifically, the rear cross member 2 is disposed at the rear side of the sub-frame 100, and both ends of the rear cross member 2 are respectively connected with the two frame rails 3, the rear cross member 2 is provided with a steering gear avoiding hole 21, as shown in fig. 2, the maximum height of the rear cross member 2 is set to be D5, and it is satisfied that 220 mm.ltoreq.d5.ltoreq.240 mm, that is, the maximum height D5 of the rear cross member 2 may be set to 220mm, 223mm, 226mm, 229mm, 232mm, 235mm, 238mm, 240mm, or the like, preferably, in this embodiment, the maximum height D5 of the rear cross member 2 may be set to 233.5mm, so that when the rear cross member 2 is provided with the steering gear avoiding hole 21, the structural strength of the rear cross member 2 can be ensured, and the durability of the rear side of the sub-frame 100 can be improved.

In addition, the minimum height of the rear cross member 2 is located at the end of the rear cross member 2, that is, at the junction of the rear cross member 2 and the frame rail 3, and in this embodiment, the minimum height of the rear cross member 2 is set to 78.366mm, so that the reliability of the connection between the rear cross member 2 and the frame rail 3 can be ensured, and the use safety can be ensured.

In some embodiments, an avoidance opening 24 is further provided at one end of the rear cross member 2, where the avoidance opening 24 is adapted to penetrate in the front-rear direction and is used for avoiding an exhaust pipe of the engine.

Specifically, as shown in fig. 1 and 3, the avoidance gap 24 is disposed at one end of the rear cross beam 2, that is, the avoidance gap 24 is disposed near the frame rail 3, and the avoidance gap 24 is adapted to be penetrated along the front-rear direction, and the exhaust pipe of the engine extends along the front-rear direction of the vehicle, so that the avoidance gap 24 can avoid the exhaust pipe of the engine, and the running reliability of the vehicle is ensured.

The avoidance notches 24 are staggered with the steering gear avoidance holes 21 in the vertical direction, so that the structural strength of the rear cross beam 2 in the vertical direction can be ensured, the exhaust pipe of the engine and the steering gear 103 are distributed at intervals, the gas exhausted by the exhaust pipe of the engine is high-temperature gas, the operation reliability of the steering gear 103 can be ensured by distributing the exhaust pipe of the engine and the steering gear 103 at intervals, and the service life of the steering gear 103 is prolonged.

In some embodiments, the avoidance gap 24 is opened downwards, and the distance between the upper wall of the avoidance gap 24 and the upper wall of the rear cross beam 2 is set to be D6, and the conditions that D6 is less than or equal to 160mm and less than or equal to 180mm are satisfied.

Specifically, dodge the opening 24 and set up in the lower wall of the one end of rear beam 2, and dodge the opening 24 and upwards recess at the lower wall of rear beam 2, dodge the opening 24 and open the setting downwards, make the user can place the upper portion of the blast pipe of engine in dodge the opening 24 from dodging the opening of opening 24, it is convenient to install, and dodge the distance between the upper wall of opening 24 and the upper wall of rear beam 2 and set up to D6, and satisfy that 160mm is less than or equal to 180mm, namely dodge the distance D6 between the upper wall of opening 24 and the upper wall of rear beam 2 can set up to 160mm, 163mm, 166mm, 169mm, 172mm, 175mm, 178mm or 180mm etc. preferably, in this embodiment, dodge the distance D6 between the upper wall of opening 24 and the upper wall of rear beam 2 can be set up to 170.2mm.

In this way, the distance D6 between the upper wall of the avoidance gap 24 and the upper wall of the rear cross beam 2 is set to be 160mm less than or equal to D6 less than or equal to 180mm, the avoidance reliability of the exhaust pipe of the engine can be ensured, the overlarge opening depth of the avoidance gap 24 can be avoided, the structural strength of the rear cross beam 2 is lower, the structural strength and durability of the rear cross beam 2 can be ensured, and the use safety is improved.

In other embodiments, the rear cross member 2 is integrally formed, the rear cross member 2 is connected between the two frame rails 3, and the rear cross member 2 can be integrally formed, which is convenient for manufacturing, can improve the production efficiency, and can improve the structural strength of the rear cross member 2.

In addition, when actually setting up, can set up rear cross beam 2 into front portion board and rear portion board according to the production demand, and front portion board and rear portion board can weld together and form complete rear cross beam 2, can reduce the production degree of difficulty to reduce manufacturing cost.

In some embodiments, the electric drive assembly 101 is in power connection with two driving shafts 102, the two driving shafts 102 extend along the transverse direction of the vehicle, and the two driving shafts 102 are respectively arranged at the avoidance spaces 51 of the two frame stringers 3 in a penetrating and corresponding manner.

Specifically, the electric drive assembly 101 is disposed in the electric drive accommodating space 6, that is, the electric drive assembly 101 is located inside the auxiliary frame 100, the electric drive assembly 101 is in power connection with driving shafts 102, as shown in fig. 8, the driving shafts 102 are two, the two driving shafts 102 are respectively in power connection with the left side and the right side of the electric drive assembly 101, the two driving shafts 102 extend in a direction away from each other, the two driving shafts 102 extend transversely along the vehicle, the driving shafts 102 can penetrate from the avoidance space 51 to the outside of the electric drive accommodating space 6, the frame longitudinal beams 3 are two, the two frame longitudinal beams 3 are respectively formed with arch structures 5, and the lower sides of the two arch structures 5 are respectively formed with the avoidance space 51.

Thus, when the electric drive assembly 101 is installed in the electric drive accommodating space 6, the two driving shafts 102 can respectively penetrate through the avoiding spaces 51 of the two frame longitudinal beams 3 in a one-to-one correspondence manner so as to extend to the outer sides of the auxiliary frame 100, and further can respectively be connected with the wheel power on two sides so as to control the wheel to rotate, so that the two wheels only need to correspondingly arrange one electric drive assembly 101, the arrangement cost is reduced, and the light weight can be improved.

In some embodiments, the front cross member 1 is provided with a front electrically driven suspension mounting point 11, each frame rail 3 is provided with a rear electrically driven suspension mounting point 33, the arch 5 is located between the rear electrically driven suspension mounting point 33 and the front cross member 1, and the front electrically driven suspension mounting point 11 and the rear electrically driven suspension mounting points 33 of the two frame rails 3 are both used to mount the electrically driven assembly 101.

Specifically, the front side of the subframe 100 is provided with a front cross member 1, the front cross member 1 is disposed along the lateral extension of the vehicle, two ends of the front cross member 1 are respectively connected with two frame longitudinal members 3 by means of welding or the like, the front cross member 1 is provided with a front electric drive suspension mounting point 11, the front electric drive suspension mounting point 11 penetrates the front cross member 1 along the front-rear direction of the vehicle, the front electric drive suspension mounting point 11 can be used for mounting a motor suspension, the two frame longitudinal members 3 are both provided with rear electric drive suspension mounting points 33, the two rear electric drive suspension mounting points 33 penetrate the corresponding frame longitudinal members 3 along the left-right direction respectively, and the rear electric drive suspension mounting points 33 are also used for mounting the motor suspension.

So, the electric drive assembly 101 can link to each other with motor suspension, and motor suspension can support the electric drive assembly 101, reduces the quiet displacement of electric drive assembly 101, and motor suspension can prevent electric drive assembly 101 self vibration source conduction to the automobile body, and then can improve whole car NVH performance, improves the user and uses the comfort level, sets up a plurality of motor suspensions, can improve the installation reliability, and makes the effort of each direction that electric drive assembly 101 produced all accessible motor suspension carry out the damping, improves the damping effect.

In some embodiments, the rear electrically driven suspension mounting points 33 of the two frame rails 3 are directly opposite in the vehicle transverse direction, and the front electrically driven suspension mounting points 11 and the rear electrically driven suspension mounting points 33 of the two frame rails 3 are distributed in an isosceles triangle.

Specifically, two frame longerons 3 all are provided with back electric drive suspension mounting point 33 for the both sides of electric drive assembly 101 can link to each other with two frame longerons 3 through motor suspension respectively, and the back electric drive suspension mounting point 33 of two frame longerons 3 is transversely just right along the vehicle, make the electric drive assembly 101 and the both sides symmetric distribution of electric drive assembly 101 of being in the connection of two frame longerons 3, and then can guarantee the symmetry of left and right sides when the vehicle sets up, in order to make the produced vibration size etc. of both sides equal when the vehicle operates, in order to guarantee vehicle running performance, avoid the vehicle to appear circumstances such as skew when high-speed traveling, improve driving stability.

Further, the front electric drive suspension mounting point 11 is arranged on the front cross beam 1 and is located in the middle of the front cross beam 1, and the two rear electric drive suspension mounting points 33 are located on the rear side of the front electric drive suspension mounting point 11, so that the front electric drive suspension mounting point 11 and the rear electric drive suspension mounting points 33 of the two frame longitudinal beams 3 are distributed in an isosceles triangle, the isosceles triangle has stability, the mounting reliability of the electric drive assembly 101 can be improved, acting forces can be symmetrically distributed on two sides of the auxiliary frame 100, and the running stability of a vehicle is improved.

In some embodiments, the spacing between the rear electrical suspension mounting point 33 and the rear cross member 2 is less than the spacing between the rear electrical suspension mounting point 33 and the front cross member 1.

Specifically, the both ends of the front cross member 1 are respectively connected with the two frame rails 3, the both ends of the rear cross member 2 are also respectively connected with the two frame rails 3, the rear electric drive suspension mounting point 33 is disposed on the frame rails 3, and as shown in fig. 6, the distance between the rear electric drive suspension mounting point 33 and the rear cross member 2 is smaller than the distance between the rear electric drive suspension mounting point 33 and the front cross member 1, that is, the distance between the rear electric drive suspension mounting point 33 and the rear cross member 2 is smaller, the distance between the rear electric drive suspension mounting point 33 and the front cross member 1 is larger, and then the rear electric drive suspension mounting point 33 is disposed close to the rear cross member 2.

Thus, the front electric drive suspension mounting point 11 can be connected with the front part of the electric drive assembly 101, the two rear electric drive suspension mounting points 33 can be connected with the rear part of the electric drive assembly 101, so that the front part and the rear part of the electric drive assembly 101 can be connected with the auxiliary frame 100, the mounting reliability is improved, the gravity of the electric drive assembly 101 can be dispersed to the front side and the rear side of the auxiliary frame 100, the integral structural strength of the auxiliary frame 100 is ensured, the durability of the auxiliary frame 100 is improved, and the use safety is ensured.

In some embodiments, the spacing between the top of the drive shaft 102 and the inner top wall of the relief space 51 is L1, and is satisfied that 10 mm.ltoreq.L1.ltoreq.15 mm.

Specifically, the electric drive assembly 101 is in power connection with the driving shaft 102, the driving shaft 102 penetrates through the avoidance space 51 to the outside of the electric drive accommodating space 6, the arch structure 5 is arched upwards, the avoidance space 51 is provided with an inner top wall, the distance between the top of the driving shaft 102 and the inner top wall of the avoidance space 51 is L1, and the distance L1 between the top of the driving shaft 102 and the inner top wall of the avoidance space 51 is 10mm or less and 15mm, namely, the distance L1 between the top of the driving shaft 102 and the inner top wall of the avoidance space 51 can be 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm or 15mm, and the like.

Preferably, in this embodiment, the distance L1 between the top of the driving shaft 102 and the inner top wall of the avoidance space 51 may be set to 12.7mm, so as to ensure that when the wheels move to the uppermost end, a sufficient movement gap is provided between the top of the driving shaft 102 and the arch structure 5, so as to avoid the movement interference of the arch structure 5 on the driving shaft 102, and ensure the operation reliability of the driving shaft 102 and the wheels.

In some embodiments, the front end of the frame rail 3 is provided with a front body mounting portion 34, the rear end of the frame rail 3 is provided with a rear body mounting portion 35, the distance between the center of the drive shaft 102 and the front body mounting portion 34 is L2, and it is satisfied that 310 mm.ltoreq.L2.ltoreq.330 mm, the distance between the center of the drive shaft 102 and the rear body mounting portion 35 is L3, and it is satisfied that 460 mm.ltoreq.L3.ltoreq.480 mm.

Specifically, the frame rail 3 extends and sets up along the fore-and-aft direction of vehicle, and the front end and the rear end of frame rail 3 link to each other with the automobile body respectively, as shown in fig. 1, the front end of frame rail 3 is provided with preceding automobile body installation department 34, preceding automobile body installation department 34 can set up to the installation sleeve, installation sleeve can pass through mode such as welding and link to each other with the front end of frame rail 3, the rear end of frame rail 3 is provided with back automobile body installation department 35, back automobile body installation department 35 also can set up to the installation sleeve, installation sleeve can pass through mode such as welding and link to each other with the rear end of frame rail 3, and then make the front end and the rear end of frame rail 3 all accessible installation sleeve link to each other with the automobile body, can increase area of connection, guarantee connection reliability.

Further, the drive shaft 102 is provided to penetrate the escape space 51, that is, the drive shaft 102 is located between the front body mounting portion 34 and the rear body mounting portion 35 in the front-rear direction, the distance between the center of the drive shaft 102 and the front body mounting portion 34 is set to L2, and it suffices that 310 mm.ltoreq.L2.ltoreq.330 mm, that is, the distance L2 between the center of the drive shaft 102 and the front body mounting portion 34 may be set to 310mm, 313mm, 316mm, 319mm, 320mm, 323mm, 326mm, 319mm, 330mm, or the like, and preferably, in this embodiment, the distance L2 between the center of the drive shaft 102 and the front body mounting portion 34 may be set to 319mm.

In addition, the distance between the center of the drive shaft 102 and the rear vehicle body mounting portion 35 is set to L3, and it is satisfied that 460 mm.ltoreq.L3.ltoreq.480 mm, that is, the distance L3 between the center of the drive shaft 102 and the rear vehicle body mounting portion 35 may be set to 460mm, 463mm, 466mm, 469mm, 470mm, 473mm, 476mm, 479mm, 480mm or the like, and preferably, in the present embodiment, the distance L3 between the center of the drive shaft 102 and the rear vehicle body mounting portion 35 may be set to 471mm.

In this way, when the rear subframe assembly 1000 is mounted at the rear portion below the vehicle body through the front vehicle body mounting portion 34 and the rear vehicle body mounting portion 35, the position of the electric drive assembly 101 in the front-rear direction of the entire vehicle can be ensured, and the position of the drive shaft 102 in the front-rear direction of the entire vehicle can be ensured, so that the reliability of the connection of the drive shaft 102 with the two rear wheels of the vehicle can be ensured.

In some embodiments, the arch 5 is located between the front body mount 34 and the middle of the frame rail 3, and the bottom surface of the front body mount 34 and the bottom surface of the middle of the frame rail 3 are both lower than the bottom surface of the rear end of the rear body mount 35.

Specifically, the frame rail 3 is formed with an arch structure 5 protruding upward, the front body mounting portion 34 is disposed at the front end of the frame rail 3, the rear body mounting portion 35 is disposed at the rear end of the frame rail 3, that is, the arch structure 5 is disposed between the front body mounting portion 34 and the rear body mounting portion 35, and the arch structure 5 is disposed between the front body mounting portion 34 and the middle portion of the frame rail 3, that is, the arch structure 5 is disposed near the front portion of the frame rail 3, so that the distance between the arch structure 5 and the front body mounting portion 34 is relatively close, the front portion of the electric drive assembly 101 is connected with the front electric drive mounting point 11 of the front cross member 1, so that the front portion of the subframe 100 needs to bear the weight of the electric drive assembly 101, and the like, the arch structure 5 can improve the structural strength of the frame rail 3, the arch structure 5 is disposed between the front body mounting portion 34 and the middle portion of the frame rail 3, and the overall structural strength of the front portion of the subframe 100 can be further improved, so that the durability of the whole subframe 100 is ensured, and the use safety is improved.

In addition, the bottom surface of the front body mounting portion 34 is set to be lower than the bottom surface of the rear end of the rear body mounting portion 35, and the bottom surface of the middle portion of the frame rail 3 is also set to be lower than the bottom surface of the rear end of the rear body mounting portion 35, that is, when the electric drive assembly 101 and other structures are mounted on the subframe 100, the center of gravity of the whole rear subframe assembly 1000 is located at the front portion of the rear subframe assembly 1000, and the arch structure 5 is set close to the front cross member 1, so that the structural strength of the front portion of the subframe 100 is higher, and further the use reliability of the whole rear subframe assembly 1000 can be ensured, so as to improve the use safety of the vehicle.

In some embodiments, the height difference L4 between the front body mounting portion 34 and the rear body mounting portion 35 is 100 mm. Ltoreq.L4. Ltoreq.120 mm.

Specifically, the front body mounting portion 34 is provided at the front end of the frame rail 3, the rear body mounting portion 35 is provided at the rear end of the frame rail 3, and the front body mounting portion 34 and the rear body mounting portion 35 have a height difference, in this embodiment, the front body mounting portion 34 is provided lower than the rear body mounting portion 35 to ensure the reliability of the use of the rear sub-frame assembly 1000 as a whole, and as shown in FIG. 3, the height difference of the front body mounting portion 34 and the rear body mounting portion 35 is set to L4, and it is satisfied that 100 mm.ltoreq.L4.ltoreq.120 mm, that is, the height difference L4 of the front body mounting portion 34 and the rear body mounting portion 35 may be set to 100mm, 102.5mm, 105mm, 107.5mm, 110mm, 112.5mm, 115mm, 117.5mm, 120mm, or the like.

Preferably, in the present embodiment, the height difference L4 between the front body mounting portion 34 and the rear body mounting portion 35 may be set to 108.5mm, so that the center of gravity of the whole rear subframe assembly 1000 is located at the front portion of the rear subframe assembly 1000, and the arch structure 5 is disposed close to the front body mounting portion 34, so that the structural strength of the arch structure 5 is higher, the structural strength of the front portion of the subframe 100 is higher, the accuracy of the relative positions of the other structures mounted to the rear subframe assembly 1000, such as the front lower control arm, the rear upper control arm, the front beam rod, the rear lower swing arm, and the like, can be ensured, the center of gravity position of the whole vehicle can be ensured, and the running stability of the vehicle can be improved.

In other embodiments, the distance between the front body mounting portion 34 and the rear body mounting portion 35 is d1, and 780 mm. Ltoreq.d1. Ltoreq.800 mm is satisfied.

Specifically, the frame rail 3 is provided extending in the front-rear direction of the vehicle, and the front body mounting portion 34 is provided at the front end of the frame rail 3, and the rear body mounting portion 35 is provided at the rear end of the frame rail 3, i.e., the front body mounting portion 34 and the rear body mounting portion 35 are spaced apart in the vehicle front-rear direction, the distance between the front body mounting portion 34 and the rear body mounting portion 35 is set to d1, and it is satisfied that 780 mm.ltoreq.d1.ltoreq.800 mm, i.e., the distance d1 between the front body mounting portion 34 and the rear body mounting portion 35 may be set to 780mm, 782.5mm, 785mm, 787.5mm, 790mm, 792.5mm, 795mm, 797.5mm, 800mm or the like.

Preferably, in the present embodiment, the distance d1 between the front body mounting portion 34 and the rear body mounting portion 35 may be set to 791mm, and the distance d1 between the front body mounting portion 34 and the rear body mounting portion 35 may be set to be 780 mm.ltoreq.d1.ltoreq.800 mm, so that the reliability of the electric drive accommodation space 6 for accommodating the electric drive assembly 101 may be ensured, and the front-rear dimension of the sub-frame 100 may be prevented from being excessively large, the weight reduction of the vehicle may be affected, and the cruising performance of the vehicle may be ensured.

Meanwhile, the steering gear 103 is arranged at the rear end of the auxiliary frame 100, the steering gear 103 is arranged on the rear cross beam 2, the rear cross beam 2 is further provided with an avoidance opening 24 for avoiding an exhaust pipe of an engine, the exhaust pipe of the engine is connected with a silencer, when the exhaust pipe is exhausted, the silencer heats up, the distance d1 between the front vehicle body mounting part 34 and the rear vehicle body mounting part 35 is set to be 780mm less than or equal to d1 less than or equal to 800mm, the situation that the distance between the steering gear 103 and the silencer is too short, the service life of the steering gear 103 is influenced, and the use reliability of the steering gear 103 is guaranteed.

In some embodiments, the inner wall surface of the escape space 51 includes a front wall surface 52 and a rear wall surface 53, and the front wall surface 52 and the rear wall surface 53 are connected to an inner vertex of the escape space 51, wherein an extension length of the front wall surface 52 is greater than an extension length of the rear wall surface 53.

Specifically, the avoidance space 51 is formed below the arch structure 5 to avoid the driving shaft 102, so that the reliability of the driving shaft 102 for driving wheels is guaranteed, the inner wall surface of the avoidance space 51 is set to be a front wall surface 52 and a rear wall surface 53, the front wall surface 52 and the rear wall surface 53 are arc surfaces, the front wall surface 52 is located at the front part of the avoidance space 51, the rear wall surface 53 is located at the rear part of the avoidance space 51, the rear end of the front wall surface 52 is connected with the front end of the rear wall surface 53, and the front wall surface 52 and the rear wall surface 53 are connected with the inner vertex of the avoidance space 51, so that the inner wall of the avoidance space 51 is uniform in transition, and the reliability of avoidance of the driving shaft 102 is guaranteed.

Further, the extension length of the front wall surface 52 is set to be greater than the extension length of the rear wall surface 53, that is, the extension length of the front portion of the arch structure 5 is set to be longer, the extension length of the rear portion of the arch structure 5 is set to be shorter, the front portion of the arch structure 5 is the front end of the frame rail 3, the front vehicle body mounting portion 34 is connected, the rear portion of the arch structure 5 is the rear end of the frame rail 3, the rear vehicle body mounting portion 35 is connected, the extension length of the front wall surface 52 is set to be greater than the extension length of the rear wall surface 53, and further, the front vehicle body mounting portion 34 is located below the rear vehicle body mounting portion 35 in the height direction, so that the structural strength of the front portion of the subframe 100 can be ensured, and use safety is further ensured.

In addition, the width of the frame longitudinal beam 3 in the left-right direction of the vehicle is 100mm, so that the structural strength of the frame longitudinal beam 3 can be ensured, the overall structural strength of the auxiliary frame 100 is improved, two sides of the electric drive assembly 101 are respectively connected with the frame longitudinal beam 3, and the installation reliability of the electric drive assembly 101 can be improved.

In some embodiments, the electric drive accommodation space 6 includes a front accommodation space 61 and a rear accommodation space 62, the front accommodation space 61 communicates with the front side of the rear accommodation space 62, i.e., the front accommodation space 61 is located on the front side, the rear accommodation space 62 is located on the rear side, and the front accommodation space 61 communicates with the rear accommodation space 62 to facilitate mounting of structural components in the front accommodation space 61 and in the rear accommodation space 62, respectively.

Further, as shown in fig. 6, a front accommodating space 61 is formed between the front portions of the two frame rails 3, that is, the front accommodating space 61 is a space formed by spacing the front portions of the two frame rails 3, the electric drive assembly 101 includes a decelerator and a drive motor, the front accommodating space 61 is used for accommodating the decelerator and the drive shaft 102, that is, the decelerator and the drive shaft 102 are mounted and accommodated in the front portion of the sub-frame 100, the decelerator is an important structure of the electric drive assembly 101 for reducing the rotation speed of the drive motor and increasing the torque so as to drive the wheels, and the output torque of the decelerator can be transmitted to the wheels through the drive shaft 102 so as to ensure stable running of the vehicle.

Wherein dodge space 51 and anterior accommodation space 61 intercommunication, owing to the front portion of frame longeron 3 is provided with arch structure 5, arch structure 5 arch upwards, with dodge space 51 in the below of arch structure 5, through dodging space 51 and anterior accommodation space 61 intercommunication, both increased the size of anterior accommodation space 61 to a certain extent, do benefit to better installation and hold reduction gear and drive shaft 102, simultaneously, also make drive shaft 102 dodge driving frame longeron 3, so that drive shaft 102 can be connected with the wheel smoothly, and then can guarantee the reliability of transmission power, and drive shaft 102 can freely move in dodging space 51, and can not interfere or collide with frame longeron 3 because of receiving the hindrance of frame longeron 3, guarantee drive shaft 102 operational reliability.

Therefore, the normal and stable operation of the speed reducer and the driving shaft 102 is ensured, the friction loss of the driving shaft 102 is reduced, particularly when the wheels jump upwards to drive the driving shaft 102 to move upwards, the driving shaft 102 can be effectively prevented from moving upwards to strike the front section of the longitudinal beam to generate noise, damage and the like, and the driving shaft 102 can be prevented from striking the front section of the longitudinal beam to generate noise, damage and the like when moving forwards and backwards or in other directions.

And as shown in fig. 6, the rear accommodating space 62 is formed between the rear portions of the two frame rails 3, that is, the rear accommodating space 62 is a space formed between the rear portions of the two frame rails 3 at intervals, the rear accommodating space 62 is used for accommodating a driving motor, that is, the driving motor is mounted and accommodated at the rear portion of the rear subframe 100, the driving motor is a core component of the electric drive assembly 101 and is used for providing power to drive the vehicle to advance, the driving motor can transmit the power to a speed reducer, then the speed reducer is used for reducing and increasing torsion, and then the driving shaft 102 drives the wheels to rotate when transmitting the power to the driving shaft 102, so that the vehicle can advance.

Therefore, by installing and accommodating the speed reducer and the driving shaft 102 in the front accommodating space 61 and installing and accommodating the driving motor in the rear accommodating space 62, the space between the frame longitudinal beams 3 is fully utilized to realize reasonable distribution and installation of the electric drive assembly 101, the space utilization rate is improved, the electric drive assembly 101 is more compact in layout, and the electric drive assembly is convenient to install, disassemble and maintain.

In some embodiments, the frame rail 3 includes an inner plate portion 31 and an outer plate portion 32, each of the inner plate portion 31 and the outer plate portion 32 being configured in a channel shape, the inner plate portion 31 and the outer plate portion 32 being snap-fit, a portion of the inner plate portion 31 and a portion of the outer plate portion 32 together forming the arch 5.

Specifically, the frame rail 3 may be integrally formed, or may be formed by welding the inner plate portion 31 and the outer plate portion 32, so that the flexibility is high, and as shown in fig. 5, in this embodiment, the frame rail 3 is provided with the inner plate portion 31 and the outer plate portion 32, the inner plate portion 31 is disposed on the inner side of the frame rail 3, the outer plate portion 32 is disposed on the outer side of the frame rail 3, the inner plate portion 31 and the outer plate portion 32 are both configured in a groove shape, and the inner plate portion 31 and the outer plate portion 32 are buckled and press-fitted, so that after the inner plate portion 31 and the outer plate portion 32 are connected, a cavity is formed inside the frame rail 3, the weight of the whole subframe 100 can be reduced, so that the weight of the vehicle can be increased, and when the acting force is conducted to the frame rail 3, the cavity in the frame rail 3 can buffer the acting force, so that the use safety can be improved, and the comfort of the user can be improved.

In addition, a part of the inner plate portion 31 and a part of the outer plate portion 32 may jointly form the arch structure 5, that is, the arch structure 5 may be uniformly distributed in the width direction of the frame rail 3, so that the structural strength of the arch structure 5 of the frame rail 3 may be enhanced, and the forces conducted by the frame rail 3 along the front-rear direction may be conducted to the arch structure 5, so as to weaken the forces, ensure the structural strength of the whole subframe 100, and improve the reliability in use.

In some embodiments, the height difference between the highest point of the relief space 51 and the lowest point of the front end of the frame rail 3 is L6, and 125mm < L6 < 145mm is satisfied.

Specifically, the arch structure 5 is upwardly arched such that an avoidance space 51 is formed thereunder, the avoidance space 51 is downwardly opened and provided with a highest point, the height difference between the highest point of the avoidance space 51 and the lowest point of the front end of the frame rail 3 is set to L6, and it is satisfied that 125 mm.ltoreq.l6.ltoreq.145 mm, that is, the height difference L6 between the highest point of the avoidance space 51 and the lowest point of the front end of the frame rail 3 may be set to 125mm、126mm、127mm、128mm、129mm、130mm、131mm、132mm、133mm、134mm、135mm、136mm、137mm、138mm、139mm、140mm、141mm、142mm、143mm、144mm、145mm or other values within 125mm to 145 mm.

It will be appreciated that the greater the height difference L6 between the highest point of the avoiding space 51 and the lowest point of the front end of the frame rail 3, i.e., the higher the highest point of the avoiding space 51, the lower the lowest point of the front end of the frame rail 3, the greater the avoiding space 51 will be, but this will result in the greater degree of upward arching of the arch 5, resulting in a complicated structure, an increased occupied size of the entire subframe 100 in the vehicle up-down direction, and an increased overall weight of the subframe 100.

Therefore, the height difference L6 between the highest point of the avoidance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is set in a reasonable range from 125mm to 145mm, the occupied size of the whole auxiliary frame 100 in the up-down direction of the vehicle can be effectively reduced, the height difference L6 between the highest point of the avoidance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is smaller, the auxiliary frame 100 is simpler in structure and lighter in weight, and the load transmission efficiency is improved.

In addition, as shown in FIG. 7, the height difference between the highest point of the avoidance space 51 and the lowest point of the middle part of the frame side member 3 is L7, and it is satisfied that 80 mm.ltoreq.L7.ltoreq.90 mm, preferably, the height difference L7 between the highest point of the avoidance space 51 and the lowest point of the middle part of the frame side member 3 is set to 82mm, and it is possible to make the height difference L7 between the highest point of the avoidance space 51 and the lowest point of the middle part of the frame side member 3 smaller while effectively reducing the occupation size of the whole subframe 100 in the up-down direction of the vehicle, so that the structure of the subframe 100 is simpler, the weight is lighter, and the load transfer efficiency is improved.

In other embodiments, the height of the arch 5 in the vertical direction of the vehicle is H1, and 70 mm.ltoreq.H2.ltoreq.80 mm is satisfied.

Specifically, as shown in FIG. 7, the height of the arch 5 in the vehicle vertical direction is set to H1, and it is satisfied that 70 mm.ltoreq.H2.ltoreq.80 mm, i.e., the height H1 of the arch 5 in the vehicle vertical direction may be set to 70mm, 71mm, 72mm, 73mm, 74mm, 75mm, 76mm, 77mm, 78mm, 79mm, 80mm, or the like, and preferably, in the present embodiment, the height H1 of the arch 5 in the vehicle vertical direction may be set to 74.4mm.

It will be appreciated that the greater the height H1 of the arch 5 in the vehicle vertical direction, i.e. the greater the structural strength of the arch 5, the lower the vertex of the avoiding space 51, which may make the avoiding space 51 smaller, and may result in the complexity of the arch 5, the greater the occupation size of the entire subframe 100 in the vehicle up-down direction, and the increased overall weight of the subframe 100.

From this, through setting up arch 5 along the vehicle vertical height H1 at 70mm to 80 mm's reasonable within range, can be when effectively reducing the occupation size of whole sub-frame 100 in the vehicle upper and lower orientation and guaranteeing the structural strength of frame longeron 3 for arch 5 along the vehicle vertical height setting is less, thereby can make sub-frame 100 structure simpler, weight lighter, and promoted load transmission efficiency.

In addition, the height of the middle part of the frame longitudinal beam 3 in the vehicle vertical direction is set to be L9, the condition that the height of the middle part of the frame longitudinal beam 3 in the vehicle vertical direction is not less than 100mm and not more than 110mm is met, the height of the rear end of the frame longitudinal beam 3 in the vehicle vertical direction is set to be L8, and the condition that the height of the rear end of the frame longitudinal beam 3 in the vehicle vertical direction is not less than 70mm and not more than 80mm is met, preferably, in the embodiment, the height of the middle part of the frame longitudinal beam 3 in the vehicle vertical direction is set to be 106.7mm, the height of the rear end of the frame longitudinal beam 3 in the vehicle vertical direction is set to be 83mm, and the auxiliary frame 100 can be simpler in structure and lighter in weight while the occupied size of the whole auxiliary frame 100 in the vehicle up and down direction is ensured, and the load transmission efficiency is improved.

And as shown in fig. 5 to 7, the frame rail 3 is provided with a front upper arm mounting bracket 40 at the upper part of the front end of the arch structure 5 and a front lower arm mounting bracket 41 at the lower part of the front end, the rear upper arm mounting bracket 42 is provided at the upper part of the rear end of the frame rail 3 and a rear lower arm mounting bracket 43 is provided at the lower part of the rear end, the front lower arm mounting bracket 41 is located in front of the front upper arm mounting bracket 40, the rear lower arm mounting bracket 43 is located in front of the rear upper arm mounting bracket 42, and the front upper arm mounting bracket 40, the front lower arm mounting bracket 41, the rear lower arm mounting bracket 43 and the rear upper arm mounting bracket 42 are all used for mounting the control arm.

Further, the front upper arm mounting bracket 40 is provided with a front upper arm mounting portion 401, the front upper arm mounting portion 401 may be provided with a mounting hole or the like, so that the control arm may be connected with the front upper arm mounting bracket 40 by a structure such as a bolt or the like, the front lower arm mounting bracket 41 is provided with a front lower arm mounting portion 411, the front lower arm mounting portion 411 may be provided with a mounting hole or the like, so that the control arm may be connected with the front lower arm mounting bracket 41 by a structure such as a bolt or the like, the rear upper arm mounting bracket 42 is provided with a rear upper arm mounting portion 421, the rear upper arm mounting portion 421 may be provided with a mounting hole or the like, so that the control arm may be connected with the rear lower arm mounting bracket 43 by a structure such as a bolt or the like, the rear lower arm mounting portion 433 may be provided with a mounting hole or the like, the structure is simple, the installation is convenient, and the setting cost is low.

In addition, the rear lower arm mounting bracket 43 includes a plate body 431 disposed front and back and a reinforcing plate 432 disposed between the two plate bodies 431, and the rear lower arm mounting portion 433 is disposed on the two plate bodies 431, so that connection reliability of the control arm connected to the rear lower arm mounting bracket 43 can be ensured, and a rear end lower portion of the frame rail 3 can be further provided with a rear suspension front beam mounting portion for mounting one end of a rear suspension front beam, and the other end of the rear suspension front beam is adapted to be connected with a knuckle, so as to ensure operation reliability of the vehicle.

And the rear cross beam 2 is also provided with a front beam adjusting avoiding hole 25 which is communicated in the front-rear direction, and the front beam adjusting avoiding hole 25 is used for avoiding an adjusting tool for adjusting the rear suspension front beam rod, so that the maintenance convenience is improved, and the maintenance time is saved.

The invention further provides a vehicle.

A vehicle according to an embodiment of the invention includes a rear subframe assembly 1000 as in any of the above.

According to the vehicle provided by the embodiment of the invention, the electric drive accommodating space 6, the avoiding space 51 and the steering gear avoiding hole 21 are arranged, so that the whole occupied space of the rear auxiliary frame assembly 1000 can be reduced, the whole integration level of the rear auxiliary frame assembly 1000 can be improved, the whole vehicle can be further lightened, the vehicle endurance performance is ensured, the use experience of a user is improved, at least part of each frame longitudinal beam 3 is constructed into the arch structure 5, the structural strength and the durability of the auxiliary frame 100 can be improved, the use safety of the rear auxiliary frame assembly 1000 can be further ensured, the use effect is better, and the application range is wider.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (22)

1. A rear subframe assembly, characterized by comprising: A subframe, the subframe comprising a front crossbeam, a rear crossbeam and two frame longitudinal beams, the front crossbeam and the rear crossbeam are spaced apart in the longitudinal direction of the vehicle and are respectively connected between the two frame longitudinal beams to jointly define an electric drive accommodating space, at least a portion of each frame longitudinal beam is configured as an arched structure, the arched structure arches upward to form an avoidance space below the arched structure, the rear crossbeam is formed with a steering gear avoidance hole, the steering gear avoidance hole is used to avoid the steering gear; An electric drive assembly is installed in the electric drive accommodating space, and the electric drive assembly is dynamically connected to a drive shaft, and the drive shaft passes through the avoidance space to the outside of the electric drive accommodating space. 2. The rear subframe assembly according to claim 1 is characterized in that the steering gear avoidance hole penetrates the rear cross beam in the front-to-rear direction, and at least a portion of the steering gear is placed in the steering gear avoidance hole. 3. The rear subframe assembly according to claim 2, characterized in that the rear cross beam is provided with a plurality of steering gear mounting points, the plurality of steering gear mounting points are used to mount the steering gear, and the plurality of steering gear mounting points are spaced and distributed around the steering gear avoidance hole; And/or, the distance between the outer wall of the part of the steering gear placed in the steering gear avoidance hole and the inner wall of the steering gear avoidance hole is set to A, and satisfies: 4mm≤A≤6mm. 4. The rear subframe assembly according to claim 1 is characterized in that at least part of the steering gear is located on the rear side of the rear cross beam, a avoidance groove is formed on the rear side wall of the rear cross beam, the avoidance groove is connected to the steering gear avoidance hole along the transverse direction of the vehicle, the steering gear is provided with a steering gear yoke, and the avoidance groove is used to avoid the steering gear yoke. 5. The rear subframe assembly according to claim 4 is characterized in that there are two avoidance grooves, and the two avoidance grooves are respectively connected to the two sides of the steering gear avoidance hole along the lateral direction of the vehicle, and the two avoidance grooves are both constructed as arc grooves, and the radii of the two avoidance grooves are respectively set to R1 and R2, and meet the following conditions: 30mm≤R1≤40mm, 40mm≤R2≤50mm. 6. The rear subframe assembly according to claim 1, characterized in that the width of the steering gear avoidance hole is set to D1 and satisfies: 270mm≤D1≤280mm; And/or, the maximum distance between the upper wall and the lower wall of the steering gear avoidance hole is set to D2, and satisfies: 140mm≤D2≤150mm; And/or, the minimum distance between the upper wall and the lower wall of the steering gear avoidance hole is set to D3, and satisfies: 110mm≤D3≤130mm. 7. The rear subframe assembly according to claim 1, characterized in that the thickness of the rear cross beam along the front-rear direction of the vehicle is set to D4 and satisfies: 60 mm ≤ D4 ≤ 80 mm; And/or, the maximum height of the rear cross beam is set to D5 and satisfies: 220 mm ≤ D5 ≤ 240 mm. 8. The rear subframe assembly according to claim 1 is characterized in that an escape notch is further provided at one end of the rear cross beam, the escape notch is suitable for passing through in the front-to-rear direction and used for escaping the exhaust pipe of the engine. 9. The rear subframe assembly according to claim 8, characterized in that the avoidance notch is open downward, and the distance between the upper wall of the avoidance notch and the upper wall of the rear cross beam is set to D6, and satisfies: 160mm≤D6≤180mm; And/or, the rear cross beam is constructed as an integral piece. 10. The rear subframe assembly according to claim 1 is characterized in that the electric drive assembly is dynamically connected to the two drive shafts, both of which extend in the transverse direction of the vehicle, and the two drive shafts are respectively and one-to-one arranged in the avoidance spaces of the two frame longitudinal beams. 11. The rear subframe assembly according to claim 1 is characterized in that the front cross beam is provided with a front electric drive suspension mounting point, each of the frame longitudinal beams is provided with a rear electric drive suspension mounting point, the arch structure is located between the rear electric drive suspension mounting point and the front cross beam, and the front electric drive suspension mounting point and the rear electric drive suspension mounting points of the two frame longitudinal beams are all used to install the electric drive assembly. 12. The rear subframe assembly according to claim 11 is characterized in that the rear electric drive suspension mounting points of the two frame longitudinal beams are directly opposite in the transverse direction of the vehicle, and the front electric drive suspension mounting point and the rear electric drive suspension mounting points of the two frame longitudinal beams are distributed in an isosceles triangle. 13. The rear subframe assembly according to claim 12, characterized in that the distance between the rear electric drive suspension mounting point and the rear cross beam is smaller than the distance between the rear electric drive suspension mounting point and the front cross beam. 14. The rear subframe assembly according to claim 1, characterized in that the distance between the top of the drive shaft and the inner top wall of the avoidance space is L1, and satisfies: 10 mm ≤ L1 ≤ 15 mm. 15. The rear subframe assembly according to claim 14, characterized in that a front body mounting portion is provided at a front end of the frame longitudinal beam, and a rear body mounting portion is provided at a rear end of the frame longitudinal beam; The distance between the center of the drive shaft and the front vehicle body mounting portion is L2, and satisfies: 310mm≤L2≤330mm; the distance between the center of the drive shaft and the rear vehicle body mounting portion is L3, and satisfies: 460mm≤L3≤480mm. 16. The rear subframe assembly according to claim 15, characterized in that the arch structure is located between the front body mounting portion and the middle portion of the frame longitudinal beam, and the bottom surface of the front body mounting portion and the bottom surface of the middle portion of the frame longitudinal beam are both lower than the bottom surface of the rear end of the rear body mounting portion. 17. The rear subframe assembly according to claim 15, characterized in that a height difference L4 between the front vehicle body mounting portion and the rear vehicle body mounting portion satisfies: 100 mm ≤ L4 ≤ 120 mm; And/or, the distance between the front vehicle body mounting portion and the rear vehicle body mounting portion is d1, and satisfies: 780 mm ≤ d1 ≤ 800 mm. 18. The rear subframe assembly according to claim 1, characterized in that the inner wall surface of the escape space comprises a front wall surface and a rear wall surface, and the front wall surface and the rear wall surface are connected at the inner vertex of the escape space; Wherein, the extension length of the front wall surface is greater than the extension length of the rear wall surface. 19. The rear subframe assembly according to claim 1 is characterized in that the electric drive accommodating space includes a front accommodating space and a rear accommodating space, the front accommodating space is connected to the front side of the rear accommodating space, the front accommodating space is formed between the front sections of the two longitudinal beams of the frame, and the rear accommodating space is formed between the rear sections of the longitudinal beams of the two longitudinal beams of the frame, the electric drive assembly includes a reducer and a drive motor, the front accommodating space is used to accommodate the reducer and the drive shaft, the avoidance space is connected to the front accommodating space, and the rear accommodating space is used to accommodate the drive motor. 20. The rear subframe assembly according to claim 1 is characterized in that the frame longitudinal beam includes an inner plate portion and an outer plate portion, the inner plate portion and the outer plate portion are both configured to be groove-shaped, the inner plate portion and the outer plate portion are snap-fitted and press-fitted, and a portion of the inner plate portion and a portion of the outer plate portion together form the arch structure. 21. The rear subframe assembly according to claim 1, characterized in that 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 L6, and satisfies: 125mm≤L6≤145mm; And/or, the height of the arch structure along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm. 22. A vehicle, characterized by comprising the rear subframe assembly according to any one of claims 1-21.