Single trailing arm type independent suspension assembly of new energy automobile

Abstract

The invention relates to the technical field of automobile suspensions, and discloses a new energy automobile single trailing arm type independent suspension assembly which comprises an automobile body, and a shock absorber assembly is installed between a trailing arm and the automobile body; the steering assembly adopts a mode of combining a steering motor and a steering worm and gear to realize wheel steering; a hub motor is installed in the wheel and located on one side of the connecting arm, a brake assembly is installed between the hub motor and the connecting arm, and a brake is used for clamping a brake disc to reduce the rotating speed of the wheel. Through the combination of the hub motor, the brake assembly, the steering motor and the shock absorber assembly, the functions of driving, braking, steering and shock absorption are integrated, and independent work of the wheel is achieved and is not interfered by other wheels. The wheel posture is adjusted to adapt to the uneven road surface, the control and comfort of the new energy automobile are improved, a traditional suspension system is simplified, the system integration degree is improved, and meanwhile the acceleration performance, stability and riding experience of the new energy automobile are optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile suspension, and in particular to a single trailing arm independent suspension assembly for a new energy automobile. Background Art

[0002] With the rapid development of the new energy vehicle industry, especially driven by electric vehicles and autonomous driving technologies, the design requirements of the suspension system have changed significantly. The suspension design of traditional vehicles mainly considers the comfort, handling and cost-effectiveness of the vehicle, but in new energy vehicles, the suspension system needs to meet these basic requirements while taking into account higher integration, lower weight, better spatial arrangement, and a high degree of matching with the electric drive system. In this context, how to achieve a high degree of integration of the suspension system and ensure vehicle power, steering, braking and shock absorption functions has become an important development direction of current suspension technology. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a single-trailing-arm independent suspension assembly for new energy vehicles, which solves the problems of increased weight, increased costs and difficult maintenance caused by the complex structure and diversified components of the suspension system in the prior art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A single trailing arm independent suspension assembly for a new energy vehicle, comprising:

[0005] A vehicle body, which is movably connected to the longitudinal arm, and a shock absorber assembly is installed between the longitudinal arm and the vehicle body;

[0006] A steering assembly connected to the trailing arm, the steering assembly comprising a steering motor, a steering gear shaft, a steering intermediate gear, a steering driven gear, a steering shaft, a steering worm wheel and a steering worm assembly and a connecting arm, the steering motor ultimately drives the connecting arm to rotate; and the steering assembly is installed in a steering system back plate, and the steering system back plate is connected to the trailing arm;

[0007] In the wheel part, a wheel hub motor is installed inside the wheel to drive the wheel to rotate and move the vehicle body, and a brake assembly is integrated between the wheel hub motor and the connecting arm to realize the driving and braking functions of the vehicle; one end of the connecting arm is connected to the steering shaft, and the other end is connected to the stator of the wheel hub motor. When the connecting arm rotates, it drives the brake assembly, the wheel hub motor and the wheel to rotate, thereby changing the direction of the vehicle body and realizing the steering function of the vehicle;

[0008] The brake assembly is integrated between the wheel hub motor and the connecting arm, and includes a brake and a brake pad inside. It is used to clamp the brake disc to reduce the wheel speed when decelerating, thereby realizing the braking function of the vehicle.

[0009] Preferably, the steering assembly also includes a steering worm, which is connected to the steering motor, the steering worm is meshed with the steering worm wheel, and the steering worm wheel is coaxially connected to the steering intermediate gear. Therefore, the steering worm drives the steering worm wheel and the steering intermediate gear to rotate after the steering worm rotates.

[0010] Preferably, a steering driven gear is meshed on one side of the steering intermediate gear, and the steering driven gear is fixed on the steering shaft. The steering shaft is fixedly connected to the connecting arm. After the steering intermediate gear rotates, it is used to drive the steering driven gear, the steering shaft, the connecting arm and the wheel to rotate along the steering shaft as the rotation axis.

[0011] Preferably, one side of the connecting arm is fixedly connected to a steering shaft, the middle of the steering shaft is connected to a steering driven gear, which is further connected to a steering intermediate gear, and the steering worm gear and the steering intermediate gear are both fixedly connected to the steering gear shaft.

[0012] The present invention provides a single trailing arm independent suspension assembly for new energy vehicles. It has the following beneficial effects:

[0013] 1. The present invention improves the ride comfort of the vehicle through the shock absorber and elastic element in the shock absorber assembly. The shock absorber and elastic element in the present design can be freely matched according to needs, such as electromagnetic shock absorber, hydraulic shock absorber, coil spring, air spring, etc., to provide different choices and required comfort. At the same time, the longitudinal arm cooperates with the shock absorber assembly to simplify the suspension design and leave more space for the design of the vehicle body. These spaces can be used to expand the space inside the vehicle and provide users with a more comfortable experience.

[0014] 2. The present invention reduces the number of swing arms compared to traditional vehicles by matching the longitudinal arm with the shock absorber assembly. The design of the wheel hub motor removes the half shaft, differential and reducer of traditional vehicles. The steering assembly replaces the traditional steering gear and steering rod design, effectively reducing the mass of the suspension assembly and providing the vehicle with better acceleration, deceleration and steering performance. It can also effectively reduce energy consumption and improve the endurance of new energy vehicles. At the same time, the reduced weight can also be distributed to other components, such as the frame, battery and other required components, to improve the performance of the entire vehicle.

[0015] 3. The present invention replaces the traditional motor reducer, differential and half shaft by designing the motor inside the wheel, and can also cooperate with ESP to achieve the same effect as the limited slip differential (LSD) to adapt to different models. The longitudinal arm and the shock absorber assembly cooperate with each other, and compared with the traditional suspension, the number of swing arms is reduced while taking into account comfort, optimizing the layout space of the chassis, providing more options for body design, and at the same time, simplifying the design and production process and reducing the design and manufacturing costs of the whole vehicle.

[0016] 4. The present invention simplifies the suspension mechanism and reduces the number of swing arms and chassis bushings by designing only one longitudinal arm and one swing arm shaft; the hub motor replaces the half shaft, reducer and differential; the steering motor and steering gear set replace the steering gear, steering rod and other components, so that the parts are highly integrated. Fewer parts can reduce manufacturing costs, reduce after-sales costs, and improve the cost performance of the whole vehicle.

[0017] 5. The present invention integrates steering, braking, driving and wheel control. The steering motor is fixed on the longitudinal arm and connected through the steering worm, steering gear and steering gear shaft to provide steering ability for the wheel. The motor is integrated into the wheel hub to provide driving force for the wheel. The brake assembly is designed together with the wheel hub motor to provide braking force for the wheel. The longitudinal arm and shock absorber assembly control wheel bounce. Compared with other designs, this design has a higher degree of integration and a simpler design. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a front view of the present invention;

[0020] Figure 3 It is an axonometric drawing of the present invention.

[0021] Among them, 1. Car body; 2. Trailing arm; 3. Steering assembly; 31. Steering motor; 32. Steering worm; 33. Steering gear shaft; 34. Steering worm gear; 35. Steering intermediate gear; 36. Steering shaft; 37. Steering driven gear; 38. Connecting arm; 4. Wheel; 5. Hub motor; 6. Shock absorber assembly; 7. Brake assembly; 8. Steering system back plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments:

[0024] A single trailing arm independent suspension assembly for a new energy vehicle comprises: a vehicle body 1, which is movably connected to a trailing arm 2, and a shock absorber assembly 6 is installed between the trailing arm 2 and the vehicle body 1; a steering assembly 3, which is connected to the trailing arm 2, and the steering assembly 3 comprises a steering motor 31, a steering gear shaft 33, a steering intermediate gear 35, a steering driven gear 37, a steering shaft 36, a steering worm wheel 34, a steering worm 32 assembly and a connecting arm 38, and the steering motor 31 eventually drives the connecting arm 38 to rotate; and the steering assembly 3 is installed in a steering system back plate 8, and the steering system back plate 8 is connected to the trailing arm 2;

[0025] In the wheel part, the wheel 4 has a hub motor 5 installed inside, which is used to drive the wheel 4 to rotate and move the vehicle body 1, and a brake assembly 7 is integrated between the hub motor 5 and the connecting arm 38 to realize the driving and braking functions of the vehicle; one end of the connecting arm 38 is connected to the steering shaft 36, and the other end is connected to the stator of the hub motor 5. When the connecting arm 38 rotates, it drives the brake assembly 7, the hub motor 5 and the wheel 4 to rotate, thereby changing the direction of the vehicle body 1 to realize the steering function of the vehicle.

[0026] In the present invention, the vehicle body 1 and the longitudinal arm 2 are flexibly linked by active connection. A shock absorber assembly 6 is installed between the longitudinal arm 2 and the vehicle body 1. When the wheel 4 is subjected to impact force from the ground, it will be transmitted to the wheel hub, and the wheel hub will transmit the impact through multiple bearings to the connecting arm 38. The connecting arm 38 is connected to the longitudinal arm 2. The longitudinal arm 2 transmits most of the impact to the shock absorber assembly 6 and a small part to the vehicle body 1. The impact will eventually be converted into elastic potential energy and thermal energy of the shock absorber, which will reduce vibration and improve the driving stability and ride comfort of the vehicle. The shock absorber and elastic element in this design can be freely matched according to needs, such as electromagnetic shock absorber, hydraulic shock absorber, coil spring, air spring, etc., to provide different choices and required comfort. .

[0027] The steering assembly 3 is composed of a steering motor 31, a steering gear assembly, a steering worm gear and a connecting arm 38. The steering motor 31 transmits torque precisely and finally controls the rotation of the connecting arm 38 to realize the steering of the wheel 4, further optimizing the flexibility and response speed of the steering system. One end of the connecting arm 38 is connected to the steering shaft 36, and the other end is connected to the stator of the wheel hub motor 5. When the connecting arm 38 rotates, it drives the brake assembly 7, the wheel hub motor 5 and the wheel 4 to rotate, thereby changing the direction of the vehicle body 1 to realize the steering function of the vehicle; the wheel hub motor 5 installed inside the wheel 4 directly drives the wheel 4 to rotate without the need for a traditional transmission device, thereby realizing the forward or backward movement of the vehicle; the wheel hub motor 5 is located on one side of the connecting arm 38, and a brake assembly is integrated between the wheel hub motor 5 and the connecting arm 38 to realize the driving and braking functions of the vehicle; the brake assembly 7 is integrated between the wheel hub motor 5 and the connecting arm 38, and the brake and brake pad therein reduce the rotation speed of the wheel 4 by clamping the brake disc, thereby realizing reliable deceleration and parking functions. Therefore, by integrating the driving, steering, shock absorption and braking functions, the suspension structure is simplified and the efficiency and performance of new energy vehicles are improved.

[0028] Please refer to the attached Figure 1-Figure 3 ,

[0029] The steering assembly 3 further includes a steering worm 32. The steering worm 32 is provided inside the steering motor. The steering worm 32 is meshed with a steering worm wheel 34. The steering worm wheel 34 is coaxially connected with a steering intermediate gear 35. Therefore, after the steering worm 32 rotates, the steering worm wheel 34 and the steering intermediate gear 35 are driven to rotate. A steering driven gear 37 is meshed on one side of the steering intermediate gear 35. The steering driven gear 37 is fixed on a steering shaft 36. The steering shaft 36 is fixedly connected to a connecting arm 38. After the steering intermediate gear 35 rotates, it is used to drive the steering driven gear 37, the steering shaft 36, the connecting arm 38 and the wheel 4 to rotate along the steering shaft 36 as the rotation axis.

[0030] In the present invention, the steering assembly 3 further includes a steering worm 32 and a steering worm wheel 34. The steering worm 32 is mounted on the output shaft of the steering motor 31 and is used to transmit the rotational power of the motor to the steering worm wheel 34. The steering worm wheel 34 is movably arranged in the middle of the steering gear shaft 33. The steering worm wheel 34 is meshed with the steering worm 32. After the steering worm 32 rotates, the steering worm wheel 34 is driven to rotate synchronously to achieve preliminary power transmission. The steering worm wheel 34 is coaxially arranged with a steering intermediate gear 35. The steering worm wheel 34 rotates while driving the steering intermediate gear 35 to rotate. One side of the steering intermediate gear 35 is meshed and connected with the steering driven gear 37. The middle part of the steering driven gear 37 is fixedly connected to the steering shaft 36, and the steering shaft 36 is fixedly connected to the connecting arm 38. When the steering intermediate gear 35 rotates, it drives the steering driven gear 37, the steering shaft 36, the connecting arm 38 and the wheel 4 to rotate around the steering shaft 36 as the rotation axis, thereby realizing the steering function of the wheel 4, simplifying the steering transmission chain, and improving the reliability and accuracy of the steering system.

[0031] Please refer to the attached Figure 1-Figure 3 A steering shaft 36 is fixedly connected to one side of the connecting arm 38, and a steering driven gear 37 is rotatably connected to the middle part of the steering shaft 36, and then connected to the steering intermediate gear 35 to realize power transmission, and the steering worm gear 34 and the steering intermediate gear 35 are both fixedly connected to the outer wall of the steering gear shaft 33.

[0032] In the present invention, one side of the connecting arm 38 is fixedly connected to the steering shaft 36, and the steering shaft 36 is connected to the trailing arm 2 and the steering system back plate 8 through a bearing, and can rotate freely around its axis, thereby realizing the functions of power transmission and structural support. The outer wall of the steering gear shaft 33 is fixedly connected to the steering worm wheel 34 and the steering intermediate gear 35 at the same time. The steering worm 32 is used to transmit the output power of the steering motor 31 to the worm wheel 34 by meshing with the steering worm wheel 34, thereby driving the steering intermediate gear 35 to rotate. The steering intermediate gear 35 is further transmitted to the steering shaft 36 and its accessories by meshing with the steering driven gear 37, and ensures the efficient transmission of the steering power, and improves the stability and accuracy of the steering system.

[0033] Working principle: When in use, when the vehicle moves, power is supplied to the wheel hub motor 5, and the wheel hub motor 5 can drive the wheel 4 to rotate, thereby driving the connecting arm 38 and the longitudinal arm 2 to move the vehicle body 1, so as to realize the forward or backward movement of the vehicle; when steering is required, power is supplied to the steering motor 31, and the steering motor 31 is used to drive the steering worm 32 to rotate. When the steering worm 32 rotates, it will drive the steering worm wheel 34 and the steering gear shaft 33 to rotate, thereby driving the steering intermediate gear 35 to rotate. Since the steering intermediate gear 35 is meshed and connected with the steering driven gear 37, the steering intermediate gear 35 can enable the steering driven gear 37 to drive the steering shaft 36 and the connecting arm 38 to rotate. Rotate, and then the connecting arm 38 drives the wheel 4 and the hub motor 5 to rotate along the steering shaft 36 as the rotation axis. At this time, the angle between the wheel 4 and the body 1 will change, thereby realizing the steering of the vehicle during movement; and when encountering bumpy road conditions, the wheel 4 will swing up and down at this time, and the impact force of the wheel 4 from the ground will be transmitted to the wheel hub, and the wheel hub will transmit the impact through multiple bearings to the connecting arm 38, and the connecting arm 38 is connected to the longitudinal arm 2, and the longitudinal arm 2 transmits most of the impact to the shock absorber assembly 6, and a small part to the body 1, and finally the impact will be converted into the elastic potential energy of the spring and the thermal energy of the shock absorber, which reduces the vibration, thereby achieving the driving stability and ride comfort of the body 1 in bumpy road conditions.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single trailing arm independent suspension assembly for a new energy vehicle, characterized in that: include: A vehicle body (1) is movably connected to a longitudinal arm (2), and a shock absorber assembly (6) is installed between the longitudinal arm (2) and the vehicle body (1); A steering assembly (3) connected to the trailing arm (2), the steering assembly (3) comprising a steering motor (31), a steering gear shaft (33), a steering intermediate gear (35), a steering driven gear (37), a steering shaft (36), a steering worm wheel (34) and a steering worm (32) combination and a connecting arm (38), wherein the steering motor (31) ultimately drives the connecting arm (38) to rotate; and the steering assembly (3) is installed in a steering system back plate (8), and the steering system back plate (8) is connected to the trailing arm (2); In the wheel part, the wheel (4) has a wheel hub motor (5) installed inside thereof, which is used to drive the wheel (4) to rotate so as to move the vehicle body (1), and a brake assembly (7) is integrated between the wheel hub motor (5) and the connecting arm (38) to realize the driving and braking functions of the vehicle; one end of the connecting arm (38) is connected to the steering shaft (36), and the other end is connected to the stator of the wheel hub motor (5); when the connecting arm (38) rotates, the brake assembly (7), the wheel hub motor (5) and the wheel (4) are driven to rotate, thereby causing the vehicle body (1) to change direction, thereby realizing the steering function of the vehicle; The brake assembly (7) is integrated between the wheel hub motor (5) and the connecting arm (38), and includes a brake and a brake pad therein, and is used to clamp the brake disc to reduce the rotation speed of the wheel (4) during deceleration, thereby realizing the braking function of the vehicle.

2. The single trailing arm independent suspension assembly for new energy vehicles according to claim 1, characterized in that: The steering assembly (3) further comprises a steering worm (32), the steering worm (32) being connected to the steering motor (31), the steering worm (32) being meshed with a steering worm wheel (34), and the steering worm wheel (34) being coaxially connected to a steering intermediate gear (35), so that when the steering worm (32) rotates, the steering worm wheel (34) and the steering intermediate gear (35) are driven to rotate.

3. The single trailing arm independent suspension assembly for new energy vehicles according to claim 2, characterized in that: A steering driven gear (37) is meshed on one side of the steering intermediate gear (35); the steering driven gear (37) is fixed on a steering shaft (36); the steering shaft (36) is fixedly connected to a connecting arm (38); after the steering intermediate gear (35) rotates, it is used to drive the steering driven gear (37), the steering shaft (36), the connecting arm (38) and the wheel (4) to rotate along the steering shaft (36) as a rotation axis.

4. The single trailing arm independent suspension assembly for new energy vehicles according to claim 3 is characterized in that: One side of the connecting arm (38) is fixedly connected to a steering shaft (36), the middle of the steering shaft (36) is connected to a steering driven gear (37), which is further connected to a steering intermediate gear (35), and the steering worm gear (34) and the steering intermediate gear (35) are both fixedly connected to the steering gear shaft (33).

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