Rear suspension system and vehicle

Abstract

The application discloses a kind of suspension systems and vehicle, suspension system includes: rear subframe, rear subframe is suitable for fixed connection with the body of vehicle;Connecting rod assembly and steering assembly, connecting rod assembly connects between rear subframe and steering assembly;Stabilizer bar, stabilizer bar is installed in rear subframe;The connecting rod assembly includes front upper swing arm, front upper swing arm is connected between rear subframe and steering assembly, and front upper swing arm is also connected with stabilizer bar;Front upper swing arm includes swing arm body and connecting arm, swing arm body is connected between rear subframe and steering assembly, connecting arm is connected between swing arm body and stabilizer bar.Therefore, according to the rear suspension system of the application, front upper swing arm is connected with rear subframe, steering assembly, stabilizer bar, to make stabilizer bar can quickly, accurately control front upper swing arm, to adjust the roll angle of vehicle, improve body stability, and improve the operating stability of vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more particularly to a rear suspension system and a vehicle having the rear suspension system. Background Technology

[0002] The vehicle's suspension is a device that transmits the interaction forces and torques between the vehicle body and the wheels. It can buffer the impact forces transmitted from uneven road surfaces to the chassis or body. The suspension can transmit the forces and torques fed back from the road surface, dampen wheel vibrations, mitigate impacts, improve the driver's driving experience, and enable the vehicle to obtain ideal motion characteristics and stable driving capabilities. The performance of the suspension system is a key component affecting the vehicle's driving performance.

[0003] In related technologies, the existing rear suspension system has poor performance, which can easily lead to excessive vehicle roll angle during driving, resulting in poor vehicle balance and poor vehicle handling stability. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a rear suspension system that improves the handling stability of a vehicle.

[0005] The rear suspension system according to the present invention includes:

[0006] Rear subframe, which is adapted to be fixedly connected to the vehicle body;

[0007] Linkage assembly and steering assembly; the linkage assembly connects the rear subframe and the steering assembly.

[0008] The stabilizer bar is mounted on the rear subframe.

[0009] The linkage assembly includes a front upper control arm that connects between the rear subframe and the steering assembly, and is also connected to the stabilizer bar.

[0010] The front upper control arm includes a control arm body and a connecting arm. The control arm body is connected between the rear subframe and the steering assembly, and the connecting arm is connected between the control arm body and the stabilizer bar.

[0011] According to the rear suspension system of the present invention, the front upper control arm is connected to the rear subframe, steering assembly, and stabilizer bar, so that the stabilizer bar can quickly and accurately control the front upper control arm, thereby adjusting the vehicle's roll angle, improving vehicle stability, and improving vehicle handling stability.

[0012] In some examples of the present invention, the swing arm body is formed with an arcuate protrusion that protrudes downward toward the swing arm body.

[0013] In some examples of the present invention, the linkage assembly further includes: a front lower control arm, a rear upper control arm, a front toe arm, and a rear lower control arm, all of which are connected between the steering assembly and the rear subframe. One end of the rear lower control arm is connected to the steering assembly, and the other end of the rear lower control arm is connected to the rear subframe or to the steering gear.

[0014] In some examples of the present invention, the rear suspension system further includes an elastic element that is elastically connected between the toe arm and the vehicle body.

[0015] In some examples of the present invention, the rear suspension system further includes: a position sensor mounted on the front upper control arm, the position sensor being used to monitor the movement displacement of the front upper control arm, and the position sensor being adapted to be connected to the vehicle's controller, the controller controlling the operation of the elastic element based on the monitoring information from the position sensor.

[0016] In some examples of the invention, the rear suspension system further includes a pressure plate, which is connected to the rear subframe and adapted to be connected to the vehicle's battery pack.

[0017] In some examples of the present invention, the rear subframe includes a front crossbeam, a rear crossbeam, and a plurality of longitudinal beams, wherein the front crossbeam and the rear crossbeam are arranged correspondingly along the length direction of the vehicle, and the plurality of longitudinal beams are connected between the front crossbeam and the rear crossbeam.

[0018] In some examples of the present invention, along the length of the vehicle, a clearance groove is formed on the side surface of the rear crossbeam away from the front crossbeam, and the clearance groove is recessed toward the interior of the rear crossbeam.

[0019] In some examples of the present invention, the rear subframe has a first mounting portion, which includes a first mounting wall and a second mounting wall disposed opposite to each other, the first mounting wall and the second mounting wall being spaced apart to form a first mounting space, and the front upper control arm being mounted in the first mounting space.

[0020] In some examples of the present invention, the first mounting wall and the second mounting wall are parallel.

[0021] In some examples of the present invention, the rear subframe has a second mounting portion, which includes a first mounting member and a second mounting member disposed opposite to each other, the first mounting member and the second mounting member being spaced apart to form a second mounting space, the first mounting member and / or the second mounting member having an arcuate surface, and the rear upper control arm being mounted in the second mounting space.

[0022] According to the present invention, the vehicle includes the aforementioned rear suspension system.

[0023] 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. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a perspective view of a rear suspension system according to an embodiment of the present invention;

[0026] Figure 2 This is a front view of the rear suspension system according to an embodiment of the present invention;

[0027] Figure 3 This is a rear view of the rear suspension system according to an embodiment of the present invention;

[0028] Figure 4 This is a top view of the rear suspension system according to an embodiment of the present invention;

[0029] Figure 5 yes Figure 4 Cross-sectional view at point AA;

[0030] Figure 6 This is a schematic diagram of the structure of the first mounting part according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the second mounting part according to an embodiment of the present invention.

[0032] Figure label:

[0033] Rear suspension system 100;

[0034] Rear subframe 1; Front crossbeam 11; Rear crossbeam 12; Clearance groove 120; Longitudinal beam 13; Drive shaft through hole 130;

[0035] First mounting section 14; First mounting wall 141; Second mounting wall 142; First mounting space 143;

[0036] Second mounting section 15; First mounting component 151; Second mounting component 152; Second mounting space 153;

[0037] Curved surface 154; Reinforced structure 155;

[0038] First buffer element 16; through hole 160;

[0039] Connecting part 17; fixing hole 170; mounting bolt 18; device space 19; arc-shaped opening 191;

[0040] Linkage assembly 2; front lower control arm 21; rear upper control arm 22; front toe arm 23; rear lower control arm 24;

[0041] Steering assembly 3; Steering knuckle 31; Wheel hub shaft 32;

[0042] Stabilizer bar 4;

[0043] Front upper swing arm 5;

[0044] Swing arm body 51; arc-shaped protrusion 510; first connecting end 511; second connecting end 512; third connecting end 513;

[0045] Connecting arm 52; fourth connecting end 521; fifth connecting end 522;

[0046] Corner plate 6; mounting hole 61; weight reduction hole 62;

[0047] Fastener 7; Suspension mounting hole 8. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] The following is for reference. Figures 1-7 This application describes a rear suspension system 100 according to an embodiment of the present invention. The rear suspension system 100 can be applied to a vehicle, but the present invention is not limited thereto. The rear suspension system 100 can be applied to other equipment that requires the installation of a rear suspension system 100. This application will use the application of the rear suspension system 100 to a vehicle as an example for illustration.

[0050] like Figures 1-5 As shown, the rear suspension system 100 according to an embodiment of the present invention includes: a rear subframe 1, a linkage assembly 2, and a steering assembly 3. The rear subframe 1 is adapted to be fixedly connected to the vehicle body. The linkage assembly 2 connects the rear subframe 1 and the steering assembly 3. A stabilizer bar 4 is mounted on the rear subframe 1. The linkage assembly 2 includes a front upper control arm 5, which is connected between the rear subframe 1 and the steering assembly 3, and is also connected to the stabilizer bar 4. The front upper control arm 5 includes a control arm body 51 and a connecting arm 52. The control arm body 51 is connected between the rear subframe 1 and the steering assembly 3, and the connecting arm 52 is connected between the control arm body 51 and the stabilizer bar 4, so that the front upper control arm 5 is movably connected to the steering assembly 3.

[0051] Combination Figure 1 and Figure 4 As shown, in some embodiments of the present invention, the rear suspension system 100 may include a rear subframe 1, two sets of linkage assemblies 2, and two sets of steering assemblies 3, along the width direction of the rear suspension system 100 (i.e., Figure 1(As shown in the left and right directions), there is a set of linkage assembly 2 and a set of steering assembly 3 on each side of the rear subframe 1. The steering assembly 3 located on the left side of the rear subframe 1 is adapted to connect with the wheel on the left side of the vehicle, and the steering assembly 3 located on the right side of the rear subframe 1 is adapted to connect with the wheel on the right side of the vehicle.

[0052] In some embodiments, the rear subframe 1 is detachably mounted to the vehicle body, allowing the rear suspension system 100 to be detachably mounted to the vehicle, facilitating subsequent replacement, maintenance, and upgrades of the rear suspension system 100 by the operator. The linkage assembly 2 is movably connected between the rear subframe 1 and the steering assembly 3, allowing the steering assembly 3 to move relative to the rear subframe 1. The stabilizer bar 4 is detachably mounted to the vehicle body, facilitating subsequent replacement, maintenance, and upgrades by the operator. The front upper control arm 5 is also connected to the stabilizer bar 4. The stabilizer bar 4 can control the displacement of the front upper control arm 5 to adjust the vehicle's roll angle, improve vehicle stability, and enhance vehicle handling stability.

[0053] like Figure 1 and Figure 2 As shown, in some embodiments, the steering assembly 3 may include a steering knuckle 31 and a hub axle 32. The hub axle 32 passes through the steering knuckle 31 and is adapted to connect with a vehicle wheel. The wheel is detachably mounted on the hub axle 32. When the wheel is assembled with the hub axle 32, the wheel can roll axially around the hub axle 32 to allow the vehicle to move. The linkage assembly 2 is movably connected between the rear subframe 1 and the steering knuckle 31. During vehicle movement, for example, when the wheel encounters a bump or pothole on the road surface, the road surface contacts the wheel, causing the wheel to bounce up or down. Since the linkage assembly 2 is movably connected between the rear subframe 1 and the steering assembly 3, the steering assembly 3 can bounce up with the wheel under the action of the wheel.

[0054] The stabilizer bar 4, also known as an anti-roll bar or balance bar, functions to prevent excessive lateral roll of the vehicle body during cornering, thus maintaining vehicle balance and improving ride comfort. Stabilizer bars 4 can be categorized into traditional stabilizer bars and active stabilizer bars. Traditional stabilizer bars are torsion bar springs made of spring steel and are U-shaped. Active stabilizer bars can be divided into hydraulic and motor-driven types. Both traditional and active stabilizer bars improve vehicle roll stability to a certain extent. In some embodiments of this invention, an active stabilizer bar is used as an example for illustration.

[0055] Since the stabilizer bar 4 is movably connected to the upper front control arm 5, the stabilizer bar 4 can control the displacement of the upper front control arm 5. For example, during vehicle cornering, one side of the vehicle's wheels tends to move along the vehicle's height direction. For instance, when one side of the vehicle's wheels tends to bounce up along the vehicle's height direction, the upper front control arm 5 tends to move upward along the vehicle's height direction. Because the upper front control arm 5 is connected to the stabilizer bar 4, the stabilizer bar 4 can generate a downward force along the vehicle's height direction acting on the upper front control arm 5, thereby limiting the displacement of the upper front control arm 5. Furthermore, the force generated by the stabilizer bar 4 can act on the steering assembly 3 along the upper front control arm 5, thereby limiting the position of the wheels so that the wheels can keep close to the ground, which helps reduce the risk of wheel separation from the road surface, adjusts the vehicle's roll angle, improves vehicle stability, and enhances the vehicle's handling stability.

[0056] In some embodiments, such as Figure 1 and Figure 2 As shown, along the width direction of the rear suspension system 100, the connection point between the stabilizer bar 4 and the front upper control arm 5 is located between the rear subframe 1 and the steering assembly 3. The stabilizer bar 4 is mounted on the rear subframe 1, and the wheels are mounted on the steering assembly 3. Through the connection between the stabilizer bar 4 and the front upper control arm 5, the force generated by the stabilizer bar 4 can act on the steering assembly 3, thereby allowing the stabilizer bar 4 to limit the displacement of the wheels. Therefore, by connecting the stabilizer bar 4 and the front upper control arm 5, the stabilizer bar 4 can quickly and accurately control the front upper control arm 5, thereby adjusting the roll angle of the vehicle, improving vehicle stability, and improving the handling stability of the vehicle.

[0057] like Figure 2 As shown, when the front upper control arm 5 is connected to the rear subframe 1, steering assembly 3, and stabilizer bar 4, the control arm body 51 extends along the width direction of the rear suspension system 100 (i.e., Figure 2 As shown in the left and right directions, the swing arm body 51 is movably connected between the rear subframe 1 and the steering assembly 3. It can also be understood that the swing arm body 51 is movably connected to the rear subframe 1 and the steering assembly 3, thereby ensuring that the steering assembly 3 can move relative to the rear subframe 1.

[0058] Connecting arm 52 along the height direction of rear suspension system 100 (i.e. Figure 2 As shown in the vertical direction, the connecting arm 52 is movably connected between the swing arm body 51 and the stabilizer bar 4. It can also be understood that the connecting arm 52 is movably connected to the swing arm body 51 and also movably connected to the stabilizer bar 4, so that the stabilizer bar 4 can accurately control the front upper swing arm 5 to adjust the vehicle's roll angle, improve vehicle stability, and improve the vehicle's handling stability.

[0059] Furthermore, since the wheel can move relative to the rear subframe 1 along the height direction of the rear suspension system 100 when it is mounted on the steering assembly 3, the connecting arm 52 extends along the height direction of the rear suspension system 100. The force exerted by the stabilizer bar 4 on the connecting arm 52 is parallel to the extension direction of the connecting arm 52, so that the stabilizer bar 4 can quickly and accurately control the front upper control arm 5, thereby adjusting the vehicle's roll angle, improving vehicle stability, and enhancing vehicle handling stability. Thus, in the rear suspension system 100 according to the embodiment of the present invention, the front upper control arm 5 is connected to the rear subframe 1, the steering assembly 3, and the stabilizer bar 4, so that the stabilizer bar 4 can quickly and accurately control the front upper control arm 5, thereby adjusting the vehicle's roll angle, improving vehicle stability, and enhancing vehicle handling stability.

[0060] like Figure 1 As shown, in some embodiments, the swing arm body 51 may have a first connecting end 511, a second connecting end 512, and a third connecting end 513. Along the extension direction of the swing arm body 51 (i.e., the length direction of the swing arm body 51), the first connecting end 511 and the third connecting end 513 are respectively located at both ends of the swing arm body 51, and the second connecting end 512 is located between the first connecting end 511 and the third connecting end 513. The first connecting end is adapted to be movably connected to the rear subframe 1, and the third connecting end 513 is adapted to be movably connected to the steering assembly 3, thereby achieving the effect of the swing arm body 51 being movably connected between the rear subframe 1 and the steering assembly 3.

[0061] The connecting arm 52 may have a fourth connecting end 521 and a fifth connecting end 522. Along the extension direction of the connecting arm 52 (i.e. the length direction of the connecting arm 52), the fourth connecting end 521 and the fifth connecting end 522 are located at the two ends of the connecting arm 52 respectively. The fourth connecting end 521 is adapted to be movably connected to the stabilizer bar 4, and the fifth connecting end 522 is adapted to be movably connected to the second connecting end 512, thereby achieving the effect of the connecting arm 52 being movably connected between the stabilizer bar 4 and the swing arm body 51.

[0062] In some embodiments, the second connecting end 512 may have a first mounting hole, the fifth connecting end 522 may have a second mounting hole, the fourth connecting end 521 may have a third mounting hole, and the end of the stabilizer bar 4 connected to the connecting arm 52 may have a fourth mounting hole.

[0063] In some embodiments, the rear suspension system 100 may further include a first fixing pin and a second fixing pin. The first fixing pin is used to connect the swing arm body 51 to the connecting arm 52, and the second fixing pin is used to connect the connecting arm 52 to the stabilizer bar 4. When the swing arm body 51 and the connecting arm 52 are assembled, the first mounting hole and the second mounting hole are correspondingly provided, and the first fixing pin passes through the first mounting hole and the second mounting hole. The swing arm body 51 and the connecting arm 52 are movably connected by the first fixing pin, so that the connecting arm 52 can rotate relative to the swing arm body 51 along the circumference of the first fixing pin.

[0064] When the connecting arm 52 is assembled with the stabilizer bar 4, the third and fourth mounting holes are correspondingly provided, and the second fixing pin passes through the third and fourth mounting holes. The connecting arm 52 and the stabilizer bar 4 are movably connected by the second fixing pin, so that the connecting arm 52 can rotate relative to the stabilizer bar 4 along the circumference of the second fixing pin. Thus, according to the embodiment of the present invention, the front upper control arm 5, the control arm body 51 is connected to the stabilizer bar 4 through the connecting arm 52, so that multiple dimensions of movement are formed between the control arm body 51 and the stabilizer bar 4, so that the stabilizer bar 4 can accurately control the front upper control arm 5 to adjust the vehicle's roll angle, improve vehicle stability, and improve the vehicle's handling stability.

[0065] In some embodiments of the present invention, such as Figure 2 As shown, the rear suspension system 100 is... Figure 2 When placed in the center, the swing arm body 51 has an arc-shaped protrusion 510 that protrudes downwards. In some embodiments, along the extending direction of the swing arm body 51, the arc-shaped protrusion 510 is located between the first connecting end 511 and the second connecting end 512. Along the height direction of the rear suspension system 100, the arc-shaped protrusion 510 is an arc-shaped structure that protrudes downwards. According to the embodiment of the present invention, the swing arm body 51 designed in this way can achieve a lightweight design of the swing arm body 51 while meeting the requirements of dynamic and static stiffness, thereby facilitating the lightweight design of the suspension system.

[0066] In some embodiments of the present invention, combined with Figures 1-4 As shown, the linkage assembly 2 may further include: a front lower control arm 21, a rear upper control arm 22, a front toe arm 23, and a rear lower control arm 24. The front lower control arm 21, the rear upper control arm 22, and the front toe arm 23 are all connected between the steering assembly 3 and the rear subframe 1. One end of the rear lower control arm 24 is connected to the steering assembly 3, and the other end of the rear lower control arm 24 is connected to the rear subframe 1 or to the steering gear, so that the steering assembly 3 can move relative to the rear subframe 1.

[0067] In some embodiments, the steering gear is detachably mounted on the rear subframe 1. Therefore, the rear suspension system 100 according to embodiments of the present invention can be optionally equipped with rear-wheel steering function according to user needs. When the rear suspension system 100 has a steering gear, the rear lower control arm 24 is movably connected between the steering assembly 3 and the steering gear. Under the action of the steering gear, the steering assembly 3 can move, thereby achieving the effect of rear-wheel steering function in the rear suspension system 100, which can reduce the turning radius of the vehicle and improve the vehicle's driving performance and precise handling. In addition, the detachable mounting of the steering gear on the rear subframe 1 also facilitates the operator to perform replacement, maintenance, and upgrades of the rear suspension system 100 in the future.

[0068] When the rear suspension system 100 does not have a steering gear, the lower rear control arm 24 is connected between the steering assembly 3 and the rear subframe 1 so that the steering assembly 3 can move relative to the rear subframe 1.

[0069] Therefore, in the rear suspension system 100 according to the embodiment of the present invention, the steering assembly 3 is movably connected to the rear subframe 1 via the front upper control arm 5, the front lower control arm 21, the rear upper control arm 22, the front toe arm 23 and the rear lower control arm 24. The rear suspension system 100 designed in this way enables the vehicle to have good stability and comfort, and can maximize the vehicle's grip, thereby improving the vehicle's handling performance.

[0070] In some embodiments of the present invention, the rear suspension system 100 may further include an elastic element that is elastically connected between the front toe arm 23 and the vehicle body. The elastic element may be constructed as a coil spring, an air suspension, an electromagnetic suspension, etc. In some embodiments of the present invention, the elastic element is constructed as an air suspension as an example for illustration.

[0071] like Figure 2 As shown, along the height direction of the vehicle, the elastic element is elastically connected between the front toe arm 23 and the vehicle body. The elastic element can absorb the force exerted on the wheels by the road surface through elastic deformation, thereby preventing the force exerted on the wheels by the road surface from being transmitted to the vehicle body, thus improving the driving experience. In addition, the elastic element can also reliably support the vehicle body and the front toe arm 23. For example, when the vehicle tilts, the vehicle body compresses the elastic element. When the elastic element is compressed by the vehicle body, it generates an elastic force acting on the vehicle body, so that the elastic element reliably supports the vehicle body, thereby preventing the vehicle roll angle from being too large, improving vehicle stability, and improving the vehicle's handling stability.

[0072] In some embodiments of the present invention, the rear suspension system 100 further includes: a position sensor, which is mounted on the front upper control arm 5, the position sensor is used to monitor the movement displacement of the front upper control arm 5, and the position sensor is adapted to be connected to the vehicle controller, the controller controlling the elastic element to work according to the monitoring information of the position sensor.

[0073] In some embodiments, the elastic element is constructed as an air suspension. The movement displacement of the front upper control arm 5 is monitored by a position sensor. The controller analyzes and processes the monitoring information from the position sensor to obtain road conditions. The controller can then control the travel length of the elastic element according to the road conditions. The controller can automatically adjust the ground clearance of the vehicle to ensure the stability and passability of the vehicle body. Furthermore, by adjusting the ground clearance of the vehicle, the center of gravity of the vehicle can be changed, which helps to improve the handling stability of the vehicle.

[0074] In some embodiments, the controller also controls the stabilizer bar 4 to operate based on the monitoring information from the position sensor. Since the position sensor can monitor the movement displacement of the front upper control arm 5, the controller can obtain the tilt angle of the front upper control arm 5. The controller can make corresponding control on the stabilizer bar 4 based on the tilt angle of the front upper control arm 5, so that the stabilizer bar 4 outputs appropriate force and torque, thereby achieving the effect of intelligent control of the stabilizer bar 4. This also helps to improve the accuracy of the stabilizer bar 4 in controlling the front upper control arm 5, which is beneficial for adjusting the vehicle's roll angle, improving vehicle stability, and enhancing the vehicle's handling stability.

[0075] In some embodiments of the present invention, combined with Figure 1 , Figure 2 and Figure 4 As shown, the rear suspension system 100 may also include a pressure plate 6, which is connected to the rear subframe 1 and adapted to be connected to the vehicle's battery pack, thereby improving the torsional stiffness and strength of the vehicle as a whole, improving the vehicle's modal characteristics, and improving the vehicle's NVH (Noise, Vibration, Harshness) performance.

[0076] In some embodiments, the battery pack is adapted to be fixedly connected to the vehicle body, and the corner plate 6 is detachably installed on the rear subframe 1. When the corner plate 6 is installed on the rear subframe 1, the battery pack can also be connected to the rear subframe 1 through the corner plate 6, thereby improving the torsional stiffness and strength of the vehicle as a whole, improving the vehicle's modal characteristics, and helping to improve the vehicle's NVH performance.

[0077] In some embodiments, such as Figure 4 As shown, the corner plate 6 may have at least one mounting hole 61, and the battery pack has at least one mating hole. When the corner plate 6 mates with the battery pack, the mounting hole 61 is adapted to correspond to the mating hole. Figure 4As shown, in some embodiments of the present invention, taking the corner plate 6 having two mounting holes 61 as an example, the corresponding battery pack has two mating holes. The two mounting holes 61 correspond one-to-one with the two mating holes, so that the fasteners 7 used for mating the corner plate 6 and the battery pack can pass through the corresponding mounting holes 61 and mating holes, thereby achieving the effect of fixed connection between the corner plate 6 and the battery pack. Furthermore, the mounting holes 61 and mating holes correspond and mate, so that the mounting holes 61 also have a positioning function, ensuring the assembly accuracy of the corner plate 6 and the battery pack. In some embodiments, such as... Figure 4 As shown, the corner plate 6 can also have at least one weight reduction hole 62. By setting the weight reduction hole 62, the weight of the corner plate 6 can be reduced, thereby achieving a lightweight design of the rear suspension system 100.

[0078] In some embodiments, the corner plate 6 may also have a positioning surface. When the corner plate 6 is fitted with the battery pack, the positioning surface is adapted to fit with the connection of the battery pack. The positioning surface may also have a positioning boss. The area where the battery pack fits with the positioning surface may have a positioning groove. The positioning boss is adapted to fit with the positioning groove. When the corner plate 6 is installed and assembled with the battery pack, the positioning boss is adapted to extend into the positioning groove, thereby making the connection between the corner plate 6 and the battery pack accurately positioned. This also facilitates the installation and assembly of the corner plate 6 and the battery pack. In addition, from the perspective of the whole vehicle, the torsional stiffness of the whole vehicle in the Y direction (i.e., the width direction of the vehicle) can be improved.

[0079] In some embodiments of the present invention, such as Figures 1-4 As shown, the rear subframe 1 may include: a front crossbeam 11, a rear crossbeam 12, and multiple longitudinal beams 13, along the length direction of the vehicle (i.e., Figure 4 (As shown in the front-to-back direction), the front crossbeam 11 and the rear crossbeam 12 are respectively arranged, and multiple longitudinal beams 13 are connected between the front crossbeam 11 and the rear crossbeam 12.

[0080] like Figure 4 As shown, in some embodiments, the rear subframe 1 includes a front crossbeam 11, a rear crossbeam 12, and two longitudinal beams 13, along the width direction of the vehicle (i.e., Figure 4 (As shown in the left-right direction), two longitudinal beams 13 are opposite and spaced apart, and both longitudinal beams 13 are connected between the front crossbeam 11 and the rear crossbeam 12. The front crossbeam 11, the rear crossbeam 12 and the longitudinal beams 13 together define the device space 19. The device space 19 can be used to arrange the vehicle's motor, so that the rear suspension system 100 can be used not only for fuel vehicles but also for electric vehicles, improving the versatility of the rear suspension system 100.

[0081] In some embodiments of the present invention, the rear subframe 1 can be manufactured using an integrated die-casting and welding process. Compared with the prior art, this not only increases the volume of the device space 19, enabling the device space 19 to meet the spatial arrangement requirements of various types of motors, but also improves the versatility of the rear suspension system 100.

[0082] In some embodiments of the present invention, combined with Figure 1 and Figure 2 As shown, an arc-shaped opening 191 is formed at the connection between the longitudinal beam 13 and the front cross beam 11. Along the height direction of the rear subframe 1, the arc-shaped opening 191 is recessed towards the interior of the rear subframe 1. The rear subframe 1 designed in this way has a stable structure and features light weight, high rigidity, strength, NVH, and excellent handling performance.

[0083] In some embodiments of the present invention, such as Figure 1 and Figure 5 As shown, the longitudinal beam 13 has a drive shaft through hole 130. The drive shaft through hole 130 is constructed as a through hole that passes through the longitudinal beam 13 and is also connected to the device space 19. The vehicle's drive shaft is adapted to pass through the drive shaft through hole 130 so that one end of the drive shaft is adapted to be connected to the motor arranged in the device space 19, and the other end of the drive shaft is adapted to be connected to the wheel hub shaft 32 of the steering assembly 3. The drive shaft is connected between the motor and the wheel hub shaft 32 to achieve the effect of the motor driving the wheel to rotate.

[0084] In some embodiments, two longitudinal beams 13 are arranged opposite each other along the width direction of the vehicle. Each longitudinal beam 13 has a drive shaft through hole 130, and the two drive shaft through holes 130 are correspondingly arranged along the width direction of the vehicle so that the motor drives the left wheel and the right wheel of the vehicle through the two drive shafts respectively. In some embodiments, the drive shaft through hole 130 can be constructed as a through hole with an elliptical cross-section. The major diameter of the drive shaft through hole 130 is L1, and the minor diameter is L2, satisfying the relationship: 170mm≤L1≤200mm, 145mm≤L2≤165mm. Preferably, L1=180mm, L2=155mm.

[0085] In some embodiments of the present invention, combined with Figure 3 and Figure 5As shown, along the length of the vehicle, a clearance groove 120 is formed on the side of the rear crossbeam 12 away from the front crossbeam 11, and the clearance groove 120 is recessed toward the interior of the rear crossbeam 12. In some embodiments, the steering gear is mounted and fixed to the rear crossbeam 12, and at least a portion of the steering gear structure is located within the clearance groove 120. By providing the clearance groove 120 recessed toward the interior of the rear crossbeam 12, it is beneficial to reduce the volume of the rear subframe 1, and the clearance groove 120 can be used to mount and arrange the steering gear, thereby benefiting the reduction of the size of the rear suspension system 100. In addition, since the steering gear is also connected to the rear lower control arm 24, when the steering gear is mounted and arranged within the clearance groove 120, the structure of the rear suspension system 100 is made more compact, further reducing the size of the rear suspension system 100. Compared with the prior art, the rear suspension system 100 according to the embodiments of the present invention has a compact structure and a smaller size, which is beneficial for the space arrangement of vehicles using the rear suspension system 100 of the embodiments of the present invention. Therefore, the rear suspension system 100 according to the embodiments of the present invention has good versatility.

[0086] In some embodiments of the present invention, such as Figure 6 As shown, the rear subframe 1 has a first mounting part 14, and the swing arm body 51 is adapted to cooperate and connect with the first mounting part 14 to achieve the effect of movable connection between the front upper swing arm 5 and the rear subframe 1. The first mounting part 14 includes a first mounting wall 141 and a second mounting wall 142 that are arranged opposite to each other. The first mounting wall 141 and the second mounting wall 142 are spaced apart to form a first mounting space 143, and the front upper swing arm 5 is mounted in the first mounting space 143.

[0087] In some embodiments, combined with Figure 4 and Figure 6 As shown, the first mounting part 14 is located at one end of the longitudinal beam 13 near the front crossbeam 11. Along the extension direction of the longitudinal beam 13 (i.e., the length direction of the longitudinal beam 13), the first mounting wall 141 and the second mounting wall 142 are arranged sequentially and spaced apart to form a first mounting space 143. The first connecting end 511 of the swing arm body 51 is installed in the first mounting space 143. The first connecting end 511 is connected to both the first mounting wall 141 and the second mounting wall 142 to achieve the effect of connecting the swing arm body 51 with the first mounting part 14.

[0088] In some embodiments, the first connecting end 511 may have a fifth mounting hole, the first mounting wall 141 may have a sixth mounting hole, and the second mounting wall 142 may have a seventh mounting hole. The fifth mounting hole is adapted to correspond to the sixth and seventh mounting holes. The rear suspension system 100 may also include a third fixing pin, which is used for the swing arm body 51 to engage with the first mounting part 14. During the engagement of the swing arm body 51 with the first mounting part 14, the first connecting end 511 is placed in the first mounting space 143. The fifth mounting hole corresponds to the sixth and seventh mounting holes, and the third fixing pin passes through the fifth, sixth, and seventh mounting holes, so that the swing arm body 51 and the first mounting part 14 are movably connected by the third fixing pin. The swing arm body 51 can rotate relative to the first mounting part 14 along the circumference of the third fixing pin, thereby achieving the effect of movably connecting the front upper swing arm 5 and the rear subframe 1. In some embodiments, the first mounting wall 141 and the second mounting wall 142 are both constructed as plate-like structures, the sixth mounting hole is constructed as a through hole penetrating the first mounting wall 141, and the seventh mounting hole is constructed as a through hole penetrating the second mounting wall 142.

[0089] In some embodiments of the present invention, combined with Figure 4 and Figure 6 As shown, the first mounting wall 141 and the second mounting wall 142 are both constructed as plate structures. The first mounting wall 141 and the second mounting wall 142 are arranged in parallel. The first mounting wall 141 and the second mounting wall 142 are spaced apart to form a first mounting space 143. The swing arm body 51 is also connected to both the first mounting wall 141 and the second mounting wall 142.

[0090] According to an embodiment of the present invention, the first mounting part 14 has a first mounting wall 141 and a second mounting wall 142 arranged in parallel, and the first mounting part 14 is connected between the front upper swing arm 5 and the rear subframe 1. The first mounting part 14 designed in this way can ensure the dynamic and static stiffness of the connection area between the first mounting part 14 and the rear subframe 1, improve the connection reliability between the first mounting part 14 and the rear subframe 1, and reduce the risk of separation between the first mounting part 14 and the rear subframe 1.

[0091] In some embodiments of the present invention, combined with Figure 4 and Figure 7 As shown, the rear subframe 1 may have a second mounting portion 15, and the rear upper swing arm 22 is adapted to cooperate and connect with the second mounting portion 15 to achieve the effect of movable connection between the rear upper swing arm 22 and the rear subframe 1. The second mounting portion 15 includes a first mounting member 151 and a second mounting member 152 disposed opposite to each other. The first mounting member 151 and the second mounting member 152 are spaced apart to form a second mounting space 153. The first mounting member 151 and / or the second mounting member 152 are formed with an arc-shaped surface 154. The rear upper swing arm 22 is mounted in the second mounting space 153.

[0092] In some embodiments, combined with Figure 4 and Figure 7 As shown, the second mounting part 15 is provided on the longitudinal beam 13 and / or the rear crossbeam 12. It can also be understood that the second mounting part 15 is provided on the longitudinal beam 13 or the rear crossbeam 12, or the second mounting part 15 is provided at the connection between the longitudinal beam 13 and the rear crossbeam 12, so that the second mounting part 15 is connected to both the longitudinal beam 13 and the rear crossbeam 12. In some embodiments of the present invention, the second mounting part 15 is connected to both the longitudinal beam 13 and the rear crossbeam 12 as an example. The first mounting member 151 is provided on the longitudinal beam 13, and the second mounting member 152 is provided on the rear crossbeam 12, so that the force on the second mounting part 15 can be transmitted to the longitudinal beam 13 and the rear crossbeam 12 respectively, thereby reducing the risk of stress concentration at the connection between the second mounting part 15 and the rear subframe 1, and reducing the risk of separation between the second mounting part 15 and the rear subframe 1.

[0093] Combination Figure 4 and Figure 7 As shown, in some embodiments, the first mounting member 151 can be constructed as a protruding structure and the second mounting member 152 can be constructed as a plate-like structure. The first mounting member 151 protrudes from the rear subframe 1 so that the side surface of the first mounting member 151 facing the second mounting member 152 forms an arc-shaped surface 154. The structural shape of the second mounting member 152 is approximately a "triangular" plate-like structure. The second mounting part 15 designed in this way can ensure the dynamic and static stiffness of the connection area between the second mounting part 15 and the rear subframe 1, improve the connection reliability between the second mounting part 15 and the rear subframe 1, and reduce the risk of separation between the second mounting part 15 and the rear subframe 1.

[0094] It should be noted that the second mounting member 152 can also be constructed as a protruding structure, such that the second mounting member 152 protrudes from the rear subframe 1, so that an arcuate surface 154 is formed on the side surface of the second mounting member 152 facing the first mounting member 151. Thus, either the first mounting member 151 or the second mounting member 152 forms an arcuate surface 154, or both the first mounting member 151 and the second mounting member 152 form an arcuate surface 154.

[0095] In some embodiments, the end of the rear upper control arm 22 connected to the second mounting portion 15 is a sixth connection end, which may have an eighth mounting hole. The first mounting member 151 may have a ninth mounting hole, and the second mounting member 152 may have a tenth mounting hole. The eighth mounting hole is adapted to correspond to the ninth and tenth mounting holes. The rear suspension system 100 may also include a fourth fixing pin, which is used for the rear upper control arm 22 to engage with the second mounting portion 15. During the engagement of the rear upper control arm 22 with the second mounting portion 15, the sixth connection end is placed in the second mounting space 153. The eighth mounting hole corresponds to the ninth and tenth mounting holes, and the fourth fixing pin passes through the eighth, ninth, and tenth mounting holes, so that the rear upper control arm 22 and the second mounting portion 15 are movably connected by the fourth fixing pin. The rear upper control arm 22 can rotate relative to the second mounting portion 15 along the circumference of the fourth fixing pin, thereby achieving the effect of movably connecting the rear upper control arm 22 with the rear subframe 1.

[0096] In some embodiments, the first mounting member 151 may be configured as a protruding structure, the ninth mounting hole may be configured as a countersunk hole recessed toward the interior of the first mounting member 151, the second mounting member 152 may be configured as a plate-like structure, and the tenth mounting hole may be configured as a through hole penetrating the second mounting member 152. In addition, in some embodiments, the second mounting member 152 may also be formed with a reinforcing structure 155, the reinforcing structure 155 protruding from the surface of the second mounting member 152, and the tenth mounting hole may have a region with the reinforcing structure 155. In some embodiments, the reinforcing structure 155 may be configured as a reinforcing rib or a reinforcing protrusion.

[0097] In some embodiments of the present invention, such as Figure 1 As shown, the rear subframe 1 may have multiple connecting portions 17, which are adapted to mate with the vehicle body to secure the rear subframe 1 to the vehicle body. In some embodiments, such as Figure 1 As shown, the rear suspension system 100 may further include a first buffer member 16 and a mounting bolt 18. The connecting part 17 may have a fixing hole 170. The first buffer member 16 is installed and fixed in the fixing hole 170. The first buffer member 16 also has a through hole 160. The mounting bolt 18 is adapted to pass through the through hole 160. The mounting bolt 18 is also adapted to be fixedly connected to the vehicle body. Thus, the rear subframe 1 is fixedly connected to the vehicle body through the mounting bolt 18, thereby achieving the effect of installing and fixing the rear subframe 1 to the vehicle body.

[0098] It should be noted that the first buffer 16 can be constructed as a bushing, and the mounting bolt 18 passes through the through hole 160 of the first buffer 16, so that the mounting bolt 18 is indirectly connected to the rear subframe 1 through the first buffer 16. When the mounting bolt 18 fixes the rear subframe 1 to the vehicle body, the first buffer 16 can elastically deform and absorb the force between the rear subframe 1 and the vehicle body, avoiding a hard connection between the rear subframe 1 and the vehicle body, reducing the risk of vibration and noise, and improving the vehicle's NVH performance (NVH, Noise, Vibration, Harshness).

[0099] In some embodiments, the diameter of the through hole 160 is R1, which satisfies the relationship: 40mm≤R1≤55mm. For example, R1 can be selected from values ​​such as 40mm, 41mm, 42mm, 43mm, 44mm or 45mm. Preferably, R1 = 42mm.

[0100] In some embodiments of the present invention, such as Figure 1 As shown, the rear subframe 1 has at least one mounting hole 8. The rear suspension system 100 may also include a mount, which is fixedly mounted in the mounting hole 8. The motor is fixedly connected to the rear subframe 1 through the mount. Since the mount can be elastically deformed, it can absorb the force between the motor and the rear subframe 1 through elastic deformation, avoiding a hard connection between the motor and the rear subframe 1, reducing the risk of vibration and noise, and improving the NVH performance of the vehicle.

[0101] In some embodiments, such as Figure 1 As shown, taking a vehicle with two motors as an example, the two motors are arranged adjacent to each other in the device space 19 along the width direction of the vehicle. One of the two motors can be used to drive the left wheel of the vehicle, and the other of the two motors can be used to drive the right wheel of the vehicle. Correspondingly, the front crossbeam 11 forms two suspension mounting holes 8, and both suspension mounting holes 8 are provided with suspensions. The two motors of the vehicle are respectively connected to the two suspensions one by one, which helps to avoid the vibration generated by the motors from being transmitted to the vehicle body.

[0102] Furthermore, each of the relatively arranged longitudinal beams 13 has a mounting hole 8, and each mounting hole 8 is equipped with a mount. The two motors of the vehicle are respectively connected to the adjacent mounts, which helps to reduce the vibration generated by the motors from being transmitted to the vehicle body and improve the vehicle's NVH performance.

[0103] In some embodiments, the suspension has a motor hole for fixed connection between the motor and the suspension. When the suspension is installed in the suspension mounting hole 8, the motor hole is located at the center of the front crossbeam 11 along the height direction of the rear subframe 1. This ensures that when the motor is installed in the rear subframe 1, the mounting point of the motor and the front crossbeam 11 is located at the center of the front crossbeam 11, thus maintaining the stability of the motor.

[0104] In some embodiments, the diameter of the motor hole suspended on the front crossbeam 11 is R2, which satisfies the relationship: 45mm≤R2≤50mm. For example, R2 can be selected from values ​​such as 45mm, 46mm, 47mm, 48mm, 49mm or 50mm. Preferably, R2 = 47.5mm.

[0105] The diameter of the motor hole suspended on the longitudinal beam 13 is set to R3, which satisfies the relationship: 53mm≤R3≤58mm. For example, R3 can be selected from values ​​such as 53mm, 54mm, 55mm, 56mm, 57mm or 58mm. Preferably, R3 = 55mm.

[0106] According to an embodiment of the present invention, the vehicle includes the rear suspension system 100 described above. It should be noted that the features and advantages described above for the rear suspension system 100 also apply to this vehicle, and will not be repeated here.

[0107] In addition, the rear suspension system 100 according to the embodiments of the present invention has the advantages of high integration and good versatility. The rear suspension system 100 can be applied to the derivation of platform-based models, shortening the product development cost and cycle. Furthermore, the rear suspension system 100 can be applied to different types of vehicles, such as fuel vehicles, pure electric EV cars, SUVs, and off-road vehicles.

[0108] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0109] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rear suspension system, characterized in that, include: A rear subframe, which is adapted to be fixedly connected to the vehicle body; A linkage assembly and a steering assembly, the linkage assembly connecting the rear subframe and the steering assembly; A stabilizer bar, which is mounted on the rear subframe; The linkage assembly includes a front upper control arm, which is connected between the rear subframe and the steering assembly, and is also connected to the stabilizer bar. The front upper control arm includes a control arm body and a connecting arm. The control arm body is connected between the rear subframe and the steering assembly, and the connecting arm is connected between the control arm body and the stabilizer bar. The linkage assembly further includes: a front lower control arm, a rear upper control arm, a front toe arm, and a rear lower control arm. The front lower control arm, the rear upper control arm, and the front toe arm are all connected between the steering assembly and the rear subframe. One end of the rear lower control arm is connected to the steering assembly, and the other end of the rear lower control arm is connected to the rear subframe or to the steering gear. The rear subframe has a second mounting portion, which includes a first mounting member and a second mounting member disposed opposite to each other. The first mounting member and the second mounting member are spaced apart to form a second mounting space. The first mounting member and / or the second mounting member have arc-shaped surfaces. The rear upper control arm is mounted in the second mounting space.

2. The rear suspension system according to claim 1, characterized in that, The swing arm body has an arc-shaped protrusion that protrudes downwards from the swing arm body.

3. The rear suspension system according to claim 1, characterized in that, Also includes: An elastic element is elastically connected between the toe arm and the vehicle body.

4. The rear suspension system according to claim 3, characterized in that, Also includes: A position sensor is mounted on the front upper control arm. The position sensor is used to monitor the movement displacement of the front upper control arm and is adapted to be connected to the vehicle's controller. The controller controls the operation of the elastic element based on the monitoring information from the position sensor.

5. The rear suspension system according to claim 1, characterized in that, Also includes: An angle plate, which is connected to the rear subframe and adapted to be connected to the vehicle's battery pack.

6. The rear suspension system according to any one of claims 1-5, characterized in that, The rear subframe includes a front crossbeam, a rear crossbeam, and multiple longitudinal beams. Along the length of the vehicle, the front crossbeam and the rear crossbeam are correspondingly arranged, and the multiple longitudinal beams are connected between the front crossbeam and the rear crossbeam.

7. The rear suspension system according to claim 6, characterized in that, Along the length of the vehicle, a clearance groove is formed on the side of the rear crossbeam away from the front crossbeam, and the clearance groove is recessed toward the interior of the rear crossbeam.

8. The rear suspension system according to any one of claims 1-5, characterized in that, The rear subframe has a first mounting portion, which includes a first mounting wall and a second mounting wall disposed opposite to each other. The first mounting wall and the second mounting wall are spaced apart to form a first mounting space, and the front upper control arm is mounted in the first mounting space.

9. The rear suspension system according to claim 8, characterized in that, The first mounting wall and the second mounting wall are parallel.

10. A vehicle, characterized in that, Includes the rear suspension system according to any one of claims 1-9.

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