Magnetorheological fluid damper, electric drive assembly and vehicle

Abstract

The application discloses a magneto-rheological fluid damper, an electric drive assembly and a vehicle, and relates to the electric drive field. The connecting piece defines a mounting through hole which is suitable for being assembled with the rotating piece; the inner shell is sleeved on the connecting piece and cooperates with the connecting piece to define a liquid storage space, and the magneto-rheological fluid is stored in the liquid storage space; the outer shell is connected with the inner shell and cooperates with the inner shell to define a mounting space, and the magnetic field generating piece is stored in the mounting space, and the magnetic field generating piece is configured to generate a magnetic field when being electrified to magnetize the soft magnetic particles in the magneto-rheological fluid to form a resistance torque between the connecting piece and the inner shell. Thus, the soft magnetic particles of the magneto-rheological fluid can be magnetized to be transformed into a solid-like substance, the connecting piece is caused to rub against the magneto-rheological fluid to play a damping role, the impact between the rotating piece assembled with the connecting piece and other components can be inhibited, the NVH performance is improved, and compared with the elastic element, the performance is good and the service life is long.

Description

Technical Field

[0001] This invention relates to the field of electric drives, and in particular to a magnetorheological fluid damper, an electric drive assembly, and a vehicle. Background Technology

[0002] In related technologies, the drive motor and reducer are splined together to transmit torque. The torque output by the drive motor to the reducer is not absolutely stable, but has fixed torque fluctuations. These torque fluctuations come from factors such as changes in magnetic reluctance, inverter drive current harmonics, and control strategies. In addition, under rapid acceleration, rapid deceleration, and start-stop conditions, it will also be subjected to severe impact loads. The high-frequency excitation of the drive motor and the impact loads will be transmitted to the reducer without attenuation, causing gear knocking and howling, and radiating structural noise through the housing, resulting in poor NVH (Noise, Vibration, Harshness) performance.

[0003] Currently, by integrating elastic elements such as rubber and polyurethane at the spline, vibration energy is absorbed through the shear and compression deformation of the elastomer. However, the internal temperature of the area is high and there is lubricating oil, which can easily lead to aging and performance degradation of the elastic elements, raising questions about reliability and resulting in poor vibration reduction. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a magnetorheological fluid vibration damper that can suppress the impact between rotating parts and other components that are assembled with connecting parts, thereby improving NVH performance, and having better performance and longer lifespan compared with elastic elements.

[0005] The present invention further proposes an electric drive assembly.

[0006] The present invention further proposes a vehicle.

[0007] The magnetorheological damper according to the present invention comprises:

[0008] A connector, wherein the connector defines a mounting through hole adapted to mate with a rotating component; The inner shell and the magnetorheological fluid are provided. The inner shell is fitted onto the connector and together with the connector defines a liquid storage space. The magnetorheological fluid is contained in the liquid storage space. The device includes an outer shell and a magnetic field generator. The outer shell is connected to the inner shell and together defines an installation space. The magnetic field generator is housed in the installation space. The magnetic field generator is configured to generate a magnetic field when energized to magnetize the soft magnetic particles in the magnetorheological fluid, thereby creating a drag torque between the connector and the inner shell.

[0009] According to the magnetorheological fluid vibration damper of the present invention, the soft magnetic particles of the magnetorheological fluid can be magnetized to transform into a solid-like substance, so that the connecting parts rub against the magnetorheological fluid to play a damping role. This can suppress the impact between the rotating parts that are assembled with the connecting parts and other components, which is beneficial to improving NVH performance. Compared with elastic elements, it has better performance and longer life.

[0010] In some examples of the present invention, the connector includes: a connecting body and a mating body, the connecting body defining the mounting through hole, the mating body being sleeved on the connecting body and connected to the connecting body, the connecting body and the inner shell jointly defining the liquid storage space, and the mating body being disposed within the liquid storage space.

[0011] In some examples of the present invention, there is at least one mating body. When there are multiple mating bodies, the multiple mating bodies are arranged at intervals along the axial direction of the magnetorheological fluid damper. There is at least one liquid storage space, and at least one mating body is provided in one of the liquid storage spaces.

[0012] In some examples of the present invention, the magnetorheological fluid damper further includes: a bearing, wherein the inner shell has a notch, and the bearing is sleeved on the connector and disposed within the notch.

[0013] In some examples of the present invention, the magnetorheological fluid vibration damper further includes: a brush box and brushes, wherein the brush box is disposed in the housing and the brushes are connected between the magnetic field generator and the brush box.

[0014] In some examples of the present invention, the housing is formed with a through hole, and the lead of the magnetic field generator passes through the through hole and is connected to the brush.

[0015] In some examples of the present invention, the magnetic field generator is constructed as an electromagnetic coil wound around the inner shell.

[0016] In some examples of the present invention, the inner wall of the mounting through hole is formed with splines or spline grooves.

[0017] According to the electric drive assembly of the present invention, there are a motor, a reducer, and a magnetorheological fluid damper. The magnetorheological fluid damper is the magnetorheological fluid damper described above. The rotor shaft of the motor is splined with the input shaft of the reducer. The mounting through hole of the magnetorheological fluid damper is fitted with the rotor shaft or the input shaft.

[0018] According to the electric drive assembly of the present invention, the soft magnetic particles of the magnetorheological fluid can be magnetized to transform into a solid-like substance, so that the connecting parts rub against the magnetorheological fluid to play a damping role. This can suppress the impact between the rotating parts that are assembled with the connecting parts and other components, which is beneficial to improving NVH performance. Compared with elastic elements, it has better performance and longer life.

[0019] The vehicle according to the present invention includes the above-described magnetorheological fluid damper, or includes the above-described electric drive assembly.

[0020] 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

[0021] 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: Figure 1 This is a cross-sectional view of the magnetorheological fluid vibration damper, motor, and reducer according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the connector according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the inner shell according to an embodiment of the present invention.

[0022] Figure label: Magnetorheological fluid vibration damper 100; Connector 10; Connecting body 12; Mounting through hole 121; Fitting body 13; Inner shell 20; liquid storage space 21; sub-shell 22; connecting part 221; 30; housing; 31; through hole; Magnetic field generator 40; Bearing 50; Brush box 51; Brush 52; Sealing structure 60; first sub-seal 61; clearance hole 611; second sub-seal 62; Motor 200; Rotor shaft 201; Reducer 300; Input shaft 301. Detailed Implementation

[0023] 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.

[0024] The following is for reference. Figures 1-3A magnetorheological fluid damper 100 according to an embodiment of the present invention is described.

[0025] like Figures 1-3 As shown, the magnetorheological fluid vibration damper 100 according to an embodiment of the present invention includes: a connector 10, an inner shell 20, a magnetorheological fluid, an outer shell 30, and a magnetic field generator 40.

[0026] The connector 10 defines a mounting through hole 121, which is suitable for assembling with a rotating component. As some embodiments of this application, a spline or spline groove is formed in the mounting through hole 121. The connector 10 can spline-mate with the rotating component. The rotating component can be constructed as the rotor shaft 201 of the motor 200, or it can be constructed as the input shaft 301 of the reducer 300. The rotor shaft 201 splines-mates with the input shaft 301. That is, the connector 10 can spline-mate with either the rotor shaft 201 or the input shaft 301.

[0027] The inner shell 20 is fitted onto the connector 10, and the inner shell 20 and the connector 10 together define the liquid storage space 21, in which the magnetorheological fluid is contained. As some embodiments of this application, the liquid storage space 21 can be sealed by a sealing element to reduce the risk of magnetorheological fluid leakage.

[0028] The outer shell 30 and the inner shell 20 are connected and together define the installation space 31. In some embodiments of this application, the outer shell 30 and the inner shell 20 can be connected by, but not limited to, bolts, snap-fits, welding, etc. A magnetic field generator 40 is housed in the installation space 31. The magnetic field generator 40 is configured to generate a magnetic field when energized, so as to magnetize the soft magnetic particles in the magnetorheological fluid, thereby creating a resistive torque between the connector 10 and the inner shell 20. In some embodiments of this application, the magnetic field generator 40 can be constructed as an electromagnetic coil or an electromagnet.

[0029] It should be noted that magnetorheological fluid is composed of a non-magnetic liquid and micron-sized soft magnetic particles suspended within it. Its working principle is as follows: When no magnetic field is applied, the soft magnetic particles are randomly distributed and move freely, exhibiting low-viscosity, free-flowing Newtonian fluid characteristics. When a magnetic field is applied, the soft magnetic particles are magnetized and arrange themselves into a chain-like or columnar three-dimensional network structure along the magnetic field lines, generating shear yield stress. The magnetorheological fluid then exhibits solid-like Bingham fluid characteristics, with significantly enhanced shear resistance. The state transition time is only on the order of milliseconds. After the magnetic field is removed, the three-dimensional structure of the particles rapidly disintegrates, and the magnetorheological fluid regains its fluidity. The shear yield stress is approximately proportional to the square of the magnetic field strength. The magnetic field strength can be controlled by adjusting the current, allowing for continuous adjustment of the damping force to meet the needs of different operating conditions.

[0030] Therefore, when the magnetic field generator 40 is energized, a magnetic field is generated. This magnetic field acts on the magnetorheological fluid, causing the fluid to exhibit solid-like Bingham fluid characteristics. This causes friction between the connector 10 and the magnetorheological fluid, resulting in damping. This suppresses the impact between rotating parts mating with the connector 10 and other components. Furthermore, since the shear yield stress of the magnetorheological fluid is approximately proportional to the square of the magnetic field strength, the magnetic field strength can be controlled by adjusting the current to achieve continuous adjustment of the damping force. This allows for control of the frictional torque between the connector 10 and the magnetorheological fluid according to actual needs, resulting in good performance and broadening the applicable operating conditions of the magnetorheological fluid vibration damper 100. In addition, the magnetorheological fluid vibration damper 100 proposed in this application serves as an after-sales maintenance solution, addressing the current problem of replacing the entire motor 200 and reducer 300 assembly due to spline wear, thus reducing after-sales maintenance costs.

[0031] Therefore, by magnetizing the soft magnetic particles of the magnetorheological fluid to transform them into a solid-like substance, the connector 10 can rub against the magnetorheological fluid, thereby playing a damping role. This can suppress the impact between the rotating parts that are assembled with the connector 10 and other components, suppress torque fluctuations, improve NVH performance, and have better performance and longer lifespan compared with elastic elements.

[0032] In some embodiments of the present invention, such as Figures 1-2 As shown, the connector 10 includes a connecting body 12 and a mating body 13. The connecting body 12 defines a mounting through hole 121, which is suitable for mating with a rotating component. In some embodiments of this application, a spline or spline groove is formed in the mounting through hole 121, allowing the connecting body 12 to engage with the rotating component via a spline. The mating body 13 is sleeved on and connected to the connecting body 12; that is, the diameter of the mating body 13 is larger than the diameter of the connecting body 12. In some embodiments of this application, the mating body 13 and the connecting body 12 are integrally formed.

[0033] The connecting body 12 and the inner shell 20 together define the liquid storage space 21. The body 13 is disposed in the liquid storage space 21. As some embodiments of this application, the liquid storage space 21 can be sealed by a sealing element to reduce the risk of magnetorheological fluid leakage.

[0034] By placing the mating body 13, which is sleeved on the connecting body 12, inside the liquid storage space 21, the contact area between the connector 10 and the magnetorheological fluid can be increased, and the friction between the connector 10 and the magnetorheological fluid can be increased, so as to play a more effective damping role and effectively suppress the impact between the rotating part that is mated with the connector 10 and other components.

[0035] As some embodiments of this application, the body 13 can be configured as a disc-mounted structure.

[0036] In some embodiments of the present invention, such as Figures 1-2 As shown, when there is at least one mating body 13, or when there are multiple mating bodies 13, the multiple mating bodies 13 are along the axial direction of the magnetorheological fluid damper 100 (i.e., Figure 1 The liquid storage spaces are arranged at intervals in the X direction shown, and there is at least one liquid storage space 21, and at least one mating body 13 is provided in each liquid storage space 21.

[0037] As some embodiments of this application, such as Figure 1 As shown, there is one main body 13 and one liquid storage space 21, with the main body 13 located inside the liquid storage space 21.

[0038] As some embodiments of this application, there are multiple mating bodies 13, and the multiple mating bodies 13 are arranged along the axial direction of the magnetorheological fluid damper 100 (i.e., Figure 1 The liquid storage spaces 21 are arranged at intervals in the X direction shown. The number of liquid storage spaces 21 is the same as the number of mating bodies 13 and they correspond one-to-one. The mating bodies 13 are located in the corresponding liquid storage spaces 21.

[0039] As some embodiments of this application, there are multiple mating bodies 13, and the multiple mating bodies 13 are arranged along the axial direction of the magnetorheological fluid damper 100 (i.e., Figure 1 The liquid storage spaces 21 are arranged at intervals (as shown in the X direction), and the number of liquid storage spaces 21 is less than the number of mating bodies 13. At least one liquid storage space 21 is provided with multiple mating bodies 13.

[0040] In this way, the number of mating bodies 13 can be set according to actual needs to meet different usage requirements. Furthermore, when there are multiple mating bodies 13, the contact area between the connector 10 and the magnetorheological fluid can be increased, and the friction between the connector 10 and the magnetorheological fluid can be increased to achieve a more effective damping effect, thereby effectively suppressing the impact between the rotating parts that are mated with the connector 10 and other components.

[0041] In some embodiments of the present invention, such as Figure 1 As shown, the magnetorheological fluid damper 100 further includes: a bearing 50, an inner shell 20 having a notch, and the bearing 50 being sleeved on the connector 10 and disposed within the notch. As some embodiments of this application, the inner shell 20 may have multiple notches, with the multiple notches along the axial direction of the magnetorheological fluid damper 100 (i.e.,...). Figure 1 The bearings are arranged at intervals (as shown in the X direction), and each notch can be equipped with a bearing 50. The bearing 50 is sleeved on the connector 10. As some embodiments of this application, the inner ring of the bearing 50 is fixed to the connector 10, and the outer ring of the bearing 50 is fixed to the inner shell 20. This arrangement can improve the rotational smoothness of the connector 10 and improve the performance of the magnetorheological fluid vibration damper 100.

[0042] In some embodiments of the present invention, such as Figure 1 As shown, the magnetorheological fluid vibration damper 100 also includes a brush box 51 and a brush 52. The brush box 51 is disposed in the housing 30. As some embodiments of this application, the brush box 51 can be disposed in the housing 30 by means of, but not limited to, snap-fit ​​or bolt connection. The brush 52 is connected between the magnetic field generating element 40 and the brush box 51. Specifically, the brush 52 is electrically connected between the magnetic field generating element 40 and the brush box 51. As some embodiments of this application, the controller can be electrically connected to the brush box 51. The controller can output current to the brush box 51 to conduct the current to the magnetic field generating element 40 through the brush 52, so as to control the magnetic field generating element 40 to generate a magnetic field. Moreover, the controller can control the magnitude of the output current to control the magnetic field strength generated by the magnetic field generating element 40, so as to realize continuous adjustment of the damping force. Thus, the magnitude of the frictional torque between the connecting element 10 and the magnetorheological fluid can be controlled according to actual needs, resulting in good performance and broadening the applicable operating conditions of the magnetorheological fluid vibration damper 100.

[0043] By setting up the brush box 51 and the brush 52, the magnetic field generator 40 can be electrically connected to the external components to achieve the effect of energizing the magnetic field generator 40. The structure is reliable and the conductivity is stable and smooth.

[0044] In some embodiments of the present invention, such as Figure 1 As shown, the outer casing 30 has a through hole 32, through which the lead wire of the magnetic field generator 40 passes and is connected to the brush 52. This arrangement allows the wiring to be routed inside the magnetorheological fluid damper 100, eliminating the need to bring the lead wire of the magnetic field generator 40 to the outside of the magnetorheological fluid damper 100, which helps to improve the reliability of the magnetorheological fluid damper 100.

[0045] In some embodiments of the present invention, such as Figure 1 As shown, the magnetorheological fluid vibration damper 100 further includes a sealing structure 60, which is disposed in the housing 30 and used to seal the brush box 51. In some embodiments of this application, the sealing structure 60 includes a first sub-seal 61 and a second sub-seal 62, which are connected to seal the brush box 51 internally. At least a portion of the first sub-seal 61 is disposed between the brush box 51 and the housing 30 and forms a clearance hole 611 communicating with the through hole 32. The lead of the magnetic field generator 40 passes through the through hole 32 and the clearance hole 611 and is connected to the brush 52. By providing the sealing structure 60, the brush box 51 can be isolated from the lubricating oil inside the isolation reducer 300, reducing the risk of brush box 51 failure.

[0046] In some embodiments of the present invention, such as Figure 1As shown, the magnetic field generator 40 is constructed as an electromagnetic coil, which is wound around the inner shell 20. In some embodiments of this application, the electromagnetic coil can be wound around the wall of the inner shell 20 away from the connector 10. By constructing the magnetic field generator 40 as an electromagnetic coil and winding it around the inner shell 20, the installation stability of the magnetic field generator 40 can be improved, the risk of the magnetic field generator 40 shifting can be reduced, and the electromagnetic coil has high energy conversion efficiency, fast response speed, and long service life, which is beneficial to improving the reliability of the magnetorheological fluid vibration damper 100.

[0047] In some embodiments of the present invention, such as Figure 2 As shown, the inner wall of the mounting through hole 121 is formed with a spline or a spline groove. In some embodiments of this application, the inner wall of the mounting through hole 121 is formed with a spline, and the outer wall of the rotating component is formed with a spline groove that mates with the spline. By forming a spline or spline groove on the inner wall of the mounting through hole 121, the connecting member 10 and the rotating component can be reliably connected together, ensuring smooth torque transmission between the connecting member 10 and the rotating component, and effectively suppressing impact between the rotating component and other parts.

[0048] In some embodiments of the present invention, such as Figure 3 As shown, the inner shell 20 may include two sub-shells 22, which are symmetrical in structure. Both sub-shells 22 have a connecting part 221, and the connecting parts 221 of the two sub-shells 22 are connected by bolts and nuts.

[0049] According to an embodiment of the present invention, an electric drive assembly includes a motor 200, a reducer 300, and a magnetorheological fluid damper 100. The magnetorheological fluid damper 100 is configured such that the rotor shaft 201 of the motor 200 is spline-fitted with the input shaft 301 of the reducer 300, and the mounting through-hole 121 of the magnetorheological fluid damper 100 is fitted with either the rotor shaft 201 or the input shaft 301. In some embodiments of this application, the mounting through-hole 121 of the magnetorheological fluid damper 100 is fitted with the rotor shaft 201. In some embodiments of this application, the mounting through-hole 121 of the magnetorheological fluid damper 100 is fitted with the input shaft 301.

[0050] As some embodiments of this application, the connecting member 10 of the magnetorheological damper 100 is sleeved on the outside of the splined joint between the rotor shaft 201 of the motor 200 and the input shaft 301 of the reducer 300. This arrangement is reasonable and can more effectively suppress the impact between the rotating parts that are assembled with the connecting member 10 and other components.

[0051] According to the electric drive assembly of the present invention, by providing a magnetorheological fluid damper 100, the soft magnetic particles of the magnetorheological fluid can be magnetized to transform into a solid-like substance, so that the connecting member 10 rubs against the magnetorheological fluid to play a damping role. This can suppress the impact between the rotating part that is fitted with the connecting member 10 and other parts, suppress torque fluctuations, improve NVH performance, and have better performance and longer lifespan compared with elastic elements.

[0052] The vehicle according to an embodiment of the present invention includes the magnetorheological fluid damper 100 described above, or includes the electric drive assembly described above.

[0053] According to the vehicle of the present invention, by providing a magnetorheological fluid damper 100, the soft magnetic particles of the magnetorheological fluid can be magnetized to transform into a solid-like substance, so that the connecting member 10 rubs against the magnetorheological fluid to play a damping role. This can suppress the impact between the rotating part that is fitted with the connecting member 10 and other parts, suppress torque fluctuations, improve NVH performance, and have better performance and longer lifespan compared with elastic elements.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0056] In the description of this invention, "a plurality of" means two or more.

[0057] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0058] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0059] 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.

[0060] 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 magnetorheological fluid vibration damper, characterized in that, include: A connector, wherein the connector defines a mounting through hole adapted to mate with a rotating component; The inner shell and the magnetorheological fluid are provided. The inner shell is fitted onto the connector and together with the connector defines a liquid storage space. The magnetorheological fluid is contained in the liquid storage space. The device includes an outer shell and a magnetic field generator. The outer shell is connected to the inner shell and together defines an installation space. The magnetic field generator is housed in the installation space. The magnetic field generator is configured to generate a magnetic field when energized to magnetize the soft magnetic particles in the magnetorheological fluid, thereby creating a drag torque between the connector and the inner shell.

2. The magnetorheological fluid vibration damper according to claim 1, characterized in that, The connector includes a connecting body and a mating body. The connecting body defines the mounting through hole. The mating body is sleeved on the connecting body and connected to the connecting body. The connecting body and the inner shell together define the liquid storage space. The mating body is disposed within the liquid storage space.

3. The magnetorheological fluid vibration damper according to claim 2, characterized in that, When there is at least one mating body, or when there are multiple mating bodies, the multiple mating bodies are arranged at intervals along the axial direction of the magnetorheological fluid damper. The liquid storage space is at least one, and at least one mating body is provided in one of the liquid storage spaces.

4. The magnetorheological fluid vibration damper according to claim 1, characterized in that, Also includes: The bearing has a notch in its inner housing and is fitted onto the connector and disposed within the notch.

5. The magnetorheological fluid vibration damper according to claim 1, characterized in that, Also includes: A brush holder and a brush, wherein the brush holder is disposed in the outer casing and the brush is connected between the magnetic field generator and the brush holder.

6. The magnetorheological fluid vibration damper according to claim 5, characterized in that, The outer casing has a through hole, and the lead wire of the magnetic field generator passes through the through hole and is connected to the brush.

7. The magnetorheological fluid vibration damper according to claim 1, characterized in that, The magnetic field generator is constructed as an electromagnetic coil, which is wound around the inner shell.

8. The magnetorheological fluid vibration damper according to claim 1, characterized in that, The inner wall of the mounting through hole is formed with splines or spline grooves.

9. An electric drive assembly, characterized in that, include: The motor, the reducer, and the magnetorheological fluid vibration damper, wherein the magnetorheological fluid vibration damper is the magnetorheological fluid vibration damper according to any one of claims 1-8, wherein the rotor shaft of the motor is splined with the input shaft of the reducer, and the mounting through hole of the magnetorheological fluid vibration damper is fitted with the rotor shaft or the input shaft.

10. A vehicle, characterized in that, It includes the magnetorheological fluid damper according to any one of claims 1-8, or the electric drive assembly according to claim 9.

Images