Active suspension system and vehicle

Abstract

The utility model belongs to the technical field of vehicle suspensions, and particularly relates to an active suspension system and a vehicle, the active suspension system comprises a suspension assembly, an actuator, a transmission assembly, a lower swing arm and a shaft joint; the lower swing arm is rotationally connected with the shaft joint, and the suspension assembly is installed on the lower swing arm. The transmission assembly is connected between the actuator and the shaft joint, and the actuator is used for driving the shaft joint and the lower swing arm to move through the transmission assembly. According to the active suspension system, a stabilizer bar does not need to be arranged, the number of parts of the active suspension system is small, and therefore the occupied space of the active suspension system is reduced, and the manufacturing cost of the active suspension system is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle suspension, in particular to an active suspension system and a vehicle. Background Art

[0002] The four-link rear suspension has good response and handling performance and is widely used in various models. However, it requires a lateral stabilizer bar to suppress the body roll, the suspension occupies a large installation space, and the active suspension design space is limited. Utility Model Content

[0003] The utility model aims at the technical problems in the prior art such as large space occupied by a four-link rear suspension, and proposes an active suspension system and a vehicle.

[0004] To solve the above problems, an embodiment of the utility model provides an active suspension system, including a suspension assembly, an actuator, a transmission assembly, a lower swing arm and a shaft joint; the lower swing arm is rotatably connected to the shaft joint, and the suspension assembly is mounted on the lower swing arm; the transmission assembly is connected between the actuator and the shaft joint, and the actuator is used to drive the shaft joint and the lower swing arm to move through the transmission assembly.

[0005] Optionally, the transmission assembly includes a rocker arm and a pull rod connected to the rocker arm; one end of the rocker arm away from the pull rod is rotatably connected to the output end of the actuator, and one end of the pull rod away from the rocker arm is rotatably connected to the shaft joint.

[0006] Optionally, the rocker arm and the pull rod are arranged at a first preset angle; the first preset angle is greater than or equal to 80 degrees and less than or equal to 100 degrees.

[0007] Optionally, the rocker arm rotates around a first axis relative to the actuator, the pull rod rotates around a second axis relative to the rocker arm, and the pull rod rotates around a third axis relative to the shaft joint; a second preset angle is set between the first axis and the second axis, and a third preset angle is set between the first axis and the third axis; the second preset angle and the third preset angle are both greater than 0 degrees and less than or equal to 5 degrees.

[0008] Optionally, the first axis, the second axis and the third axis are arranged in parallel.

[0009] Optionally, the active suspension system further comprises a subframe, the actuator is mounted on the subframe, and one end of the lower swing arm away from the axle joint is rotatably connected to the subframe.

[0010] Optionally, the active suspension system further comprises an upper arm, one end of the upper arm is rotationally connected to the axle joint, and the other end of the upper arm is rotationally connected to the sub-frame.

[0011] Optionally, the active suspension system further comprises a toe arm, one end of which is rotatably connected to the axle joint, and the other end of which is rotatably connected to the subframe.

[0012] Optionally, the active suspension system further comprises a longitudinal arm, one end of the longitudinal arm is connected to the axle joint, and the other end of the longitudinal arm is rotationally connected to the vehicle body.

[0013] Optionally, the active suspension system further comprises at least one bushing, and the subframe is mounted on the vehicle body via the bushing.

[0014] Optionally, the suspension assembly includes a spring and a shock absorber installed at intervals on the lower arm.

[0015] Another embodiment of the utility model further provides a vehicle, comprising the above-mentioned active suspension system.

[0016] In the utility model, the suspension assembly is installed on the lower swing arm, the transmission assembly is connected between the actuator and the shaft joint, and the actuator is used to drive the shaft joint and the lower swing arm to move through the transmission assembly; the up and down movement of the lower swing arm can change the elastic force, the action force, etc. of the suspension assembly, and the active suspension system can be adjusted according to different road conditions, and has good response performance and control performance; and the transmission assembly can drive the shaft joint to move up and down, and the action force is directly transmitted to the shaft joint, and the transmission efficiency of the action force is high, so that the relative movement between the vehicle body and the wheel can be accurately controlled. In addition, the active suspension system does not need to set a stabilizer bar, and its parts are less, thereby reducing the occupied space and manufacturing cost of the active suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 A schematic diagram of the structure of an active suspension system provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of an active suspension system provided by an embodiment of the utility model;

[0020] Figure 3 A partial structural schematic diagram of an active suspension system provided in one embodiment of the utility model.

[0021] The reference numerals in the specification are as follows:

[0022] 1. Suspension assembly; 11. Spring; 12. Shock absorber; 2. Actuator; 3. Transmission assembly; 31. Rocker arm; 32. Pull rod; 4. Lower arm; 5. Axle joint; 6. Subframe; 7. Upper arm; 8. Front toe arm; 9. Trailing arm. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the utility model and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations of the utility model.

[0025] In the present invention, the X direction is the direction along the length (front and back) of the vehicle, the Y direction is the direction along the width (left and right) of the vehicle, and the Z direction is the vertical direction along the height of the vehicle.

[0026] like Figures 1 to 3 As shown, an active suspension system provided by the first embodiment of the utility model includes a suspension assembly 1, an actuator 2, a transmission assembly 3, a lower swing arm 4 and a shaft joint 5; the lower swing arm 4 is rotatably connected to the shaft joint 5, and the suspension assembly 1 is installed on the lower swing arm 4; the transmission assembly 3 is connected between the actuator 2 and the shaft joint 5, and the actuator 2 is used to drive the shaft joint 5 and the lower swing arm 4 to move through the transmission assembly 3. It can be understood that the actuator 2 includes but is not limited to a motor, etc.; the lower swing arm 4 and the shaft joint 5 can be rotatably connected through a ball pin, a bushing, etc.; the transmission assembly 3 can convert the rotation of the actuator 2 into the up and down movement of the shaft joint 5. Preferably, the actuator 2 includes a driving member and a reducer, the output end of the driving member is connected to the input end of the reducer, and the output end of the reducer is rotatably connected to the lower swing arm 4; wherein the reducer can be a single-stage reducer, a multi-stage reducer, a planetary gear reducer, a harmonic gear reducer, etc. or a combination thereof.

[0027] In a specific embodiment, the lower arm 4 is a boat-shaped sheet metal structure, and the shaft joint 5 is an important component connecting the suspension system and the wheel assembly, and is forged.

[0028] In the utility model, the suspension assembly 1 is installed on the lower arm 4, the transmission assembly 3 is connected between the actuator 2 and the shaft joint 5, and the actuator 2 is used to drive the shaft joint 5 and the lower arm 4 to move through the transmission assembly 3; the up and down movement of the lower arm 4 can change the elastic force, the action force, etc. of the suspension assembly 1, and the active suspension system can be adjusted according to different road conditions, and has good response performance and control performance; and the transmission assembly 3 can drive the shaft joint 5 to move up and down, and the action force is directly transmitted to the shaft joint 5, and the transmission efficiency of the action force is high, so that the relative movement between the vehicle body and the wheel can be accurately controlled. In addition, the active suspension system does not need to set a stabilizer bar, and its parts are less, thereby reducing the occupied space and manufacturing cost of the active suspension system.

[0029] In one embodiment, if Figures 1 to 3 As shown, the transmission assembly 3 includes a rocker arm 31 and a pull rod 32 connected to the rocker arm 31; one end of the rocker arm 31 away from the pull rod 32 is rotatably connected to the output end of the actuator 2, and one end of the pull rod 32 away from the rocker arm 31 is rotatably connected to the shaft joint 5. It can be understood that the rocker arm 31 and the pull rod 32 constitute a connecting rod structure, and both the rocker arm 31 and the pull rod 32 adopt a two-force rod structure, which has a simple shape and structure.

[0030] Specifically, the actuator 2 drives the rocker arm 31 to rotate, and the rocker arm 31 drives the shaft section 5 and the lower swing arm 4 to move up and down through the pull rod 32. In this embodiment, the transmission assembly 3 has a simple structure, low manufacturing cost and compact structure.

[0031] In one embodiment, the rocker arm 31 and the pull rod 32 are arranged at a first preset angle; the first preset angle is greater than or equal to 80 degrees and less than or equal to 100 degrees (for example, the first angle is equal to 85 degrees, 95 degrees, etc.). It can be understood that the angle between the first connecting line and the second connecting line is the first preset angle, the first connecting line is the connecting line between the first connecting part and the second connecting part, the second connecting line is the connecting line between the second connecting part and the third connecting part, the first connecting part is the connecting part between the rocker arm 31 and the actuator 2, the second connecting part is the connecting part between the rocker arm 31 and the pull rod 32, and the third connecting part is the connecting part between the pull rod 32 and the shaft section 5. Preferably, the first preset angle is equal to 90 degrees. In this embodiment, the rocker arm 31 is approximately arranged along the X direction, and the pull rod 32 is approximately arranged along the Z direction. The angle between the rocker arm 31 and the pull rod 32 is approximately equal to 90 degrees, so that the active suspension system fully utilizes the space in the X direction and the Z direction in the suspension, further improving the compactness of the active suspension system.

[0032] In one embodiment, the rocker arm 31 rotates around the first axis relative to the actuator 2, the pull rod 32 rotates around the second axis relative to the rocker arm 31, and the pull rod 32 rotates around the third axis relative to the shaft joint 5; the first axis and the second axis are arranged at a second preset angle, and the first axis and the third axis are arranged at a third preset angle; the second preset angle and the third preset angle are both greater than 0 degrees and less than or equal to 5 degrees. Preferably, the first axis, the second axis and the third axis are arranged in parallel; that is, the second preset angle and the third preset angle are both equal to 0 degrees.

[0033] It can be understood that the actuator 2 can drive the rocker arm 31 to rotate around the first axis, one end of the tie rod 32 and the rocker arm 31 to rotate around the second axis, and the other end of the tie rod 32 and the shaft joint 5 to rotate around the third axis. In this embodiment, the first axis, the second axis and the third axis are approximately arranged along the Y direction. In the process that the actuator 2 drives the shaft joint 5 to move up and down through the rocker arm 31 and the tie rod 32, the internal force (friction force, etc.) between the actuator 2 and the rocker arm 31 is small, the internal force (friction force, etc.) between the rocker arm 31 and the tie rod 32 is small, and the internal force (friction force, etc.) between the tie rod 32 and the shaft joint 5 is small. The actuator 2, the rocker arm 31, the tie rod 32 and the shaft joint 5 are free to move and the force is relatively uniform, thereby improving the durability of the active suspension system.

[0034] In one embodiment, if Figures 1 to 3 As shown, the active suspension system further includes a subframe 6, the actuator 2 is mounted on the subframe 6, and one end of the lower swing arm 4 away from the shaft joint 5 is rotatably connected to the subframe 6. It can be understood that the actuator 2 is approximately fixedly mounted on the subframe 6 along the Y direction, the rocker arm 31 is approximately arranged along the X direction, and the pull rod 32 is approximately arranged along the Z direction, so that the active suspension system fully utilizes the space in the X direction, the Y direction and the Z direction, further improves the compactness of the active suspension system, and reduces the occupied space of the active suspension system.

[0035] In one embodiment, if Figures 1 to 3 As shown, the active suspension system further includes an upper arm 7, one end of which is rotationally connected to the shaft joint 5 (rotationally connected by a ball pin, etc.), and the other end of which is rotationally connected to the sub-frame 6 (rotationally connected by a ball pin, etc.). It can be understood that the upper arm 7 adopts a two-force rod structure, and its shape and structure are simple; the upper arm 7 is approximately arranged along the Y direction, and the upper arm 7 can transmit lateral force between the shaft joint 5 (wheel) and the sub-frame 6.

[0036] In one embodiment, if Figures 1 to 3 As shown, the active suspension system also includes a toe arm 8, one end of which is rotationally connected to the axle joint 5 (rotationally connected by a ball pin, etc.), and the other end of the toe arm 8 is rotationally connected to the subframe 6 (rotationally connected by a ball pin, etc.); it can be understood that the toe arm 8 adopts a two-force rod structure, and its shape and structure are simple; the toe arm 8 is used to adjust the toe angle of the wheel through the axle joint 5, thereby ensuring the stability of the wheel operation.

[0037] The active suspension system further includes a trailing arm 9, one end of which is connected to the shaft joint 5 (fixedly connected to the shaft joint 5 through a bushing, etc.), and the other end of which is rotationally connected to the vehicle body (rotationally connected through a ball pin, etc.). It can be understood that the trailing arm 9 can transmit longitudinal force between the active suspension system and the vehicle body.

[0038] In the utility model, the active suspension system integrates a lower swing arm 4, a toe arm 8, an upper arm 7 and a trailing arm 9, so that the active suspension system is a four-link suspension with a simple structure and high stability.

[0039] In one embodiment, the active suspension system further includes at least one bushing, and the subframe 6 is mounted on the vehicle body through the bushing. In a specific embodiment, the subframe 6 is mounted on the vehicle body through six bushings. In this embodiment, the design of the bushing improves the stiffness of the subframe 6 while also improving the vibration isolation performance of the active suspension system and the NVH performance of the entire vehicle.

[0040] In one embodiment, if Figure 1 As shown, the suspension assembly 1 includes a spring 11 and a shock absorber 12 installed at intervals on the lower arm 4. It can be understood that the end of the shock absorber 12 away from the lower arm 4 is connected to the vehicle body, and the end of the spring 11 away from the lower arm 4 is connected to the vehicle body. In this embodiment, the shock absorber 12 and the spring 11 are installed at intervals on the lower arm 4, the spring 11 mainly plays a role of bearing, and the shock absorber 12 mainly plays a role of vibration reduction, which ensures the height of the vehicle body, and the stiffness of the active suspension system can be designed to be smaller, thereby improving the comfort of the vehicle.

[0041] Another embodiment of the utility model also provides a vehicle, including the above-mentioned active suspension system. It should be noted that the vehicle has an active suspension system arranged at intervals on the left and right, and the two active suspension systems can act and control independently, and the active suspension system has a large up and down bounce stroke, and can apply different control vehicles to different working conditions, and can control the body movement on the left and right at the same time, so that the body does not pitch when accelerating and decelerating; and when the two active suspension systems are controlled in opposite directions on the left and right, the body can be turned without tilting, and the operation stability and comfort of different working conditions are achieved.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An active suspension system, characterized in that: It includes a suspension assembly, an actuator, a transmission assembly, a lower swing arm and a shaft joint; the lower swing arm is rotatably connected to the shaft joint, and the suspension assembly is installed on the lower swing arm; the transmission assembly is connected between the actuator and the shaft joint, and the actuator is used to drive the shaft joint and the lower swing arm to move through the transmission assembly.

2. The active suspension system according to claim 1, characterized in that: The transmission assembly includes a rocker arm and a pull rod connected to the rocker arm; one end of the rocker arm away from the pull rod is rotatably connected to the output end of the actuator, and one end of the pull rod away from the rocker arm is rotatably connected to the shaft joint.

3. The active suspension system according to claim 2, characterized in that: The rocker arm and the pull rod are arranged at a first preset angle; the first preset angle is greater than or equal to 80 degrees and less than or equal to 100 degrees.

4. The active suspension system according to claim 2, characterized in that: The rocker arm rotates around a first axis relative to the actuator, the pull rod rotates around a second axis relative to the rocker arm, and the pull rod rotates around a third axis relative to the shaft joint; a second preset angle is set between the first axis and the second axis, and a third preset angle is set between the first axis and the third axis; the second preset angle and the third preset angle are both greater than 0 degrees and less than or equal to 5 degrees.

5. The active suspension system according to claim 4, characterized in that: The first axis, the second axis and the third axis are arranged in parallel.

6. The active suspension system according to claim 1, characterized in that: The active suspension system also includes a subframe, the actuator is mounted on the subframe, and one end of the lower swing arm away from the shaft joint is rotatably connected to the subframe.

7. The active suspension system according to claim 6, characterized in that: The active suspension system further comprises an upper arm, one end of the upper arm is rotatably connected to the shaft joint, and the other end of the upper arm is rotatably connected to the subframe; and / or The active suspension system further comprises a toe arm, one end of which is rotatably connected to the shaft joint, and the other end of which is rotatably connected to the subframe; and / or The active suspension system further comprises a longitudinal arm, one end of which is connected to the shaft joint, and the other end of which is rotationally connected to the vehicle body.

8. The active suspension system according to claim 6, characterized in that: The active suspension system further includes at least one bushing, through which the subframe is mounted on the vehicle body.

9. The active suspension system according to any one of claims 1 to 8, characterized in that: The suspension assembly includes a spring and a shock absorber which are installed on the lower swing arm at intervals.

10. A vehicle, characterized in that: Comprising the active suspension system as claimed in any one of claims 1 to 9.

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