Integrated active suspension
By integrating a linear motor and a magnetorheological damper into the active suspension, the problems of high energy consumption and high cost of active suspension are solved, and low-energy, low-cost multi-mode adjustment is achieved, improving the shock absorption effect and control flexibility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-03-13
AI Technical Summary
Existing active suspension systems are energy-intensive and costly, and their damping force adjustment range is limited and inflexible, making it difficult to effectively control the vehicle's vibration reduction effect under complex road conditions.
It adopts an integrated active suspension, combining linear motor components and magnetorheological damper components. The magnetorheological damper provides a large damping force and recovers electrical energy, while the linear motor provides auxiliary force, realizing multiple working modes to adjust vehicle vibration.
It reduces energy consumption and cost, provides a wider range of damping force adjustment, improves control flexibility and shock absorption effect, and ensures stability and safety under complex road conditions.
Smart Images
Figure CN223989929U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive suspension technology, specifically to an integrated active suspension. Background Technology
[0002] As a crucial component of a vehicle, the suspension plays a vital role in ride comfort, driving stability, and safety during operation. Traditional passive suspensions primarily dissipate energy through friction, generating damping forces to achieve vibration reduction. However, the stiffness and damping force of traditional passive suspensions remain constant. When a vehicle travels on roads with complex conditions, the vibration reduction effect of the passive suspension may not meet expectations.
[0003] With the continuous development of technology, semi-active suspension has gradually replaced traditional passive suspension. Currently, the most commonly used semi-active suspension is the magnetorheological type. Compared with passive suspension, a major breakthrough of semi-active suspension is that it can adjust the damping coefficient in real time according to changes in road conditions, thereby achieving better vibration reduction. However, semi-active suspension also has certain problems, namely, the range of damping force adjustment is very limited, and because it can only generate a force that hinders motion, the adjustment is not flexible. Therefore, active suspension, which can generate active force, has emerged. Since it can generate both damping force and active force that promotes motion, active suspension can adjust more flexibly according to road conditions, thereby achieving better control.
[0004] However, current active suspension systems are energy-intensive and costly, which poses a significant obstacle to their widespread adoption. Therefore, an integrated active suspension system is proposed. Utility Model Content
[0005] The purpose of this invention is to provide an integrated active suspension to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated active suspension, comprising a linear motor assembly and a magnetorheological damper assembly, wherein the magnetorheological damper assembly is disposed on the central axis of the linear motor assembly, an end cap is disposed on the upper part of the magnetorheological damper assembly, a spring tower is sleeved on the end cap, a spring tray is disposed on the top of the mover of the linear motor assembly, and a tower-shaped spring is disposed between the spring tray and the spring tower;
[0007] The bottom of the mover of the linear motor assembly is fixedly connected to a lower end cover of the mover. A fork arm connector is provided on the bottom surface of the lower end cover of the mover. The bottom surface of the fork arm connector is fixedly connected to the movable end of the magnetorheological damper assembly. A fork arm is sleeved on the fork arm connector.
[0008] Preferably, the magnetorheological damper assembly includes a damper outer cylinder, an end cap connector, a float, a piston assembly, a piston rod, a guide, and a guide cap.
[0009] Preferably, the linear motor assembly includes a magnetic shielding plate, an annular permanent magnet, an auxiliary motion structure, a carbon fiber permanent magnet outer cylinder, a stator upper end cover, a coil winding bearing, a coil, a coil outer cylinder, a fixed guide ring, a motor coil support, bolts, a stator lower end cover, and a stator fixing nut.
[0010] Preferably, the magnetic shielding plate is sleeved on the outer side of the damper outer cylinder, the stator fixing nut is threaded to the bottom of the outer side of the damper outer cylinder, and the guide cover is fixedly connected to the bottom surface of the stator fixing nut for limiting the guide.
[0011] Preferably, the fixed guide ring, the motor coil support and the coil winding bearing are slidably connected to the outer side of the carbon fiber permanent magnet outer cylinder, and the outer cylinder is fixedly connected to the motor coil support and the lower end cover of the mover by bolts.
[0012] Preferably, the spring tray is fixedly connected to the top surface of the motor coil support, and the fixed guide ring is fixedly connected to the motor coil support.
[0013] Preferably, the coil is enveloped on the outer side of the coil winding bearing.
[0014] Preferably, a displacement sensor is provided on the outer cylinder of the coil, the coil is connected to a motor coil lead, and the motor coil lead passes through the lower end cover of the mover and extends out.
[0015] Preferably, the piston assembly and the piston rod are fixedly connected, the piston assembly is connected to an excitation coil lead, and the excitation coil lead is led out from the bottom of the fork arm connector through the piston rod.
[0016] Preferably, the piston assembly divides the space inside the damper outer cylinder into an upper chamber and a lower chamber within the damper outer cylinder, and a buffer block is fitted onto the guide cover.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. When this device is in active drag mode, the magnetorheological damper assembly can achieve a very large damping coefficient with extremely low power consumption. The linear motor assembly requires very little force or no linear motor assembly operation, making this integrated active suspension low in cost and energy consumption, and with broader market application potential.
[0019] 2. This device utilizes the fact that vehicle body vibration will activate the device to enter the energy feeding mode when the linear motor assembly does not provide force. At this time, the electrical energy generated by the up-and-down movement of the coil can be recovered, further reducing the energy consumption of the device and facilitating its widespread application.
[0020] 3. This device can provide both forces that impede movement and forces that promote movement, and the adjustable range of the force is larger, thus providing better control. This makes the device more flexible in control and has a better shock absorption effect.
[0021] 4. By concentrically arranging the linear motor assembly, magnetorheological damper assembly, and tower spring, this device not only has a compact structure and small footprint, which facilitates its installation, but also ensures that the magnetorheological damper assembly can still function normally even if the linear motor assembly fails unexpectedly, thus avoiding extreme vibrations in the vehicle and making this integrated active suspension safer. Attached Figure Description
[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings described below are merely some embodiments of this utility model, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Wherein:
[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0024] Figure 2 This is a schematic diagram showing the connection between the linear motor assembly and the magnetorheological damper assembly in this utility model;
[0025] Figure 3 This is a cross-sectional view of the overall structure of this utility model;
[0026] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.
[0027] In the diagram: 1. End cap; 2. Spring tower; 3. Tower-shaped spring; 4. Stator upper end cap; 5. Auxiliary motion structure; 6. Magnetic shielding plate; 7. Fixed guide ring; 8. Motor coil support; 9. Piston assembly; 10. Piston rod; 11. Coil; 12. Coil outer cylinder; 13. Guide; 14. Buffer block; 15. Mover lower end cap; 16. Fork arm connector; 17. Fork arm; 18. End cap connector; 19. Upper chamber; 20. Carbon fiber permanent magnet outer cylinder; 21. Float; 22. Damper outer cylinder; 23. Spring tray; 24. Bolt; 25. Coil winding bearing; 26. Ring permanent magnet; 27. Displacement sensor; 28. Lower chamber; 29. Stator lower end cap; 30. Stator fixing nut; 31. Guide cover; 32. Motor coil lead; 33. Excitation coil lead. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.
[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0031] Reference Figure 1-4 As shown, this utility model provides a technical solution for an integrated active suspension:
[0032] Reference Figure 1As shown, an integrated active suspension includes a linear motor assembly and a magnetorheological damper assembly. The magnetorheological damper assembly is located on the central axis of the linear motor assembly. An end cap 1 is provided on the upper part of the magnetorheological damper assembly for connecting to the vehicle body and is located at the upper end of this integrated active suspension. A spring tower 2 is sleeved on the outer side of the end cap 1. A spring tray 23 is provided on the top of the mover of the linear motor assembly. A tower-shaped spring 3 is provided between the spring tray 23 and the spring tower 2. It should be noted that the material of the tower-shaped spring 3 can be silicon manganese steel. It has a tower-shaped structure to provide stiffness to support the vehicle body. Its lower end is ground flat for more stable contact with the top surface of the spring tray 23. Correspondingly, the spring tray 23 is provided to cooperate with the installation of the tower-shaped spring 3.
[0033] The real-time adjustable force of this integrated active suspension is provided by the magnetorheological damper assembly and the linear motor assembly. The output force of the linear motor assembly and the damping force of the magnetorheological damper assembly are superimposed to form the real-time adjustable output force of this integrated active suspension.
[0034] It should be noted that the linear motor assembly and the magnetorheological damper assembly are connected in parallel, as shown in the reference. Figure 3 As can be seen, the linear motor assembly includes a stator and a mover. The stator of the linear motor assembly is fixedly connected to the inactive part of the magnetorheological damper assembly, while the mover of the linear motor assembly can move repeatedly along its central axis under vehicle vibration. Here, the extensibility of the tower spring 3 is utilized.
[0035] This integrated active suspension has three operating modes: energy feeding mode, active drag mode, and active thrust mode.
[0036] Among them, the energy recovery mode: when the vehicle body vibrates, the mover of the linear motor assembly will cut the magnetic field lines to generate electrical energy, which can be recovered.
[0037] Active Drag Mode: When the force required by this integrated active suspension is opposite to the direction of vehicle body vibration, the required force is first provided by the magnetorheological damper assembly. The part of the required force that cannot be provided is provided by the linear motor assembly. Due to the characteristics of the magnetorheological damper assembly, a large damping force can be achieved with very little power. Therefore, the power consumption of this integrated active suspension under this condition is significantly reduced compared with traditional active suspension.
[0038] Active thrust mode: When the force required by this integrated active suspension is in the same direction as the vibration, since the required force can only be provided by the linear motor assembly, in order to reduce energy consumption under this condition, the damping coefficient of the magnetorheological damper assembly is adjusted to the minimum, so that the damping force opposite to the vibration direction of the vehicle body is reduced to the minimum.
[0039] The linear motor assembly has a lower end cover 15 fixedly connected to the bottom of the mover. The bottom surface of the lower end cover 15 is provided with a fork arm connector 16. The bottom surface of the fork arm connector 16 is fixedly connected to the movable end of the magnetorheological damper assembly. A fork arm 17 is sleeved on the fork arm connector 16, which is also used to connect with the vehicle body and is located at the lower end of this integrated active suspension.
[0040] Furthermore, it should be noted that the magnetorheological damper assembly includes a damper outer cylinder 22, an end cap connector 18, a float 21, a piston assembly 9, a piston rod 10, a guide 13, and a guide cover 31.
[0041] It should be noted that the end cap connector 18 not only connects to the end cap 1, but also seals the magnetorheological fluid inside the outer cylinder 22 of the damper. The float plug 21 is positioned above the piston assembly 9 to compensate for the volume of the piston assembly 9. The guide 13 is equipped with a piston rod dynamic seal and a guide bushing, which serve to seal the magnetorheological fluid inside the outer cylinder 22 of the damper and to guide it.
[0042] The linear motor assembly includes a magnetic shielding plate 6, a ring-shaped permanent magnet 26, an auxiliary motion structure 5, a carbon fiber permanent magnet outer cylinder 20, a stator upper end cover 4, a coil winding bearing 25, a coil 11, a coil outer cylinder 12, a fixed guide ring 7, a motor coil support 8, bolts 24, a stator lower end cover 29, and a stator fixing nut 30. It should be noted that the auxiliary motion structure 5 is a cylindrical ring used to support the inner wall of the carbon fiber permanent magnet outer cylinder 20.
[0043] It should be noted that the magnetic shielding plate 6 is sleeved on the outer side of the damper outer cylinder 22. The magnetic shielding plate 6 serves to shield the magnetic field, preventing the magnetic field of the annular permanent magnet 26 from affecting the magnetorheological fluid of the internal magnetorheological damper assembly. The annular permanent magnet 26 is sleeved on the magnetic shielding plate 6. The carbon fiber permanent magnet outer cylinder 20, as its name suggests, is located outside the annular permanent magnet 26. It can be made of carbon fiber and not only guides the movement of the linear motor assembly's mover but also provides installation space for the annular permanent magnet 26. The stator fixing nut 30 is threaded to the bottom of the outer side of the damper outer cylinder 22, and the guide cover 31 is fixedly connected to the bottom surface of the stator fixing nut 30 for limiting movement. The guide 13, fixed guide ring 7, motor coil support 8, and coil winding bearing 25 are slidably connected to the outer side of the carbon fiber permanent magnet outer cylinder 20. The outer cylinder 12 is fixedly connected to the motor coil support 8 and the lower end cover 15 of the mover by bolts 24. The spring tray 23 is fixedly connected to the top surface of the motor coil support 8. The fixed guide ring 7 is fixedly connected to the motor coil support 8. The coil 11 is wrapped around the outer side of the coil winding bearing 25. It should be noted that the coil winding bearing 25 not only facilitates the winding process of the coil 11, but also guides the movement of the mover of the linear motor assembly. A displacement sensor 27 is installed on the outer cylinder 12 to monitor the coil. The movement of the outer cylinder 12, it should be noted that, to facilitate sensing by the displacement sensor 27, a certain distance is provided between the outer cylinder 12 and the coil 11. The coil 11 is connected to a motor coil lead 32 for connecting to an external power source. The motor coil lead 32 passes through the lower end cover 15 of the mover and extends outwards. The piston assembly 9 and the piston rod 10 are fixedly connected. It should be noted that the piston rod 10 is the movable end of the magnetorheological damper assembly. The piston assembly 9 is connected to an excitation coil lead 33. It should be noted that the damper outer cylinder 22 provides a accommodating space, which is used not only to house the piston assembly 9 and piston rod 10, but also to contain the magnetorheological fluid. The piston assembly 9 is equipped with... There is an annular flow channel for connecting the upper chamber 19 and the lower chamber 28. The piston assembly 9 also includes an excitation coil, which is used to generate a magnetic field. By applying different currents, the magnetic field strength at the annular flow channel is changed, thereby changing the viscosity of the magnetorheological fluid and the damping coefficient of the magnetorheological damper. This is existing technology and will not be described in detail here. The excitation coil lead 33 is led out from the bottom of the fork arm connector 16 through the piston rod 10. The piston assembly 9 divides the space inside the damper outer cylinder 22 into the upper chamber 19 and the lower chamber 28. A buffer block 14 is fitted on the guide cover 31 to reduce the wear between the internal structures of this integrated active suspension caused by vehicle body vibration during operation.
[0044] The working principle of this integrated active suspension will now be explained through its operation in energy-gathering mode, active drag mode, and active thrust mode:
[0045] This integrated active suspension is installed on the vehicle. When the vehicle is in a bumpy state, as long as the linear motor assembly is not providing force, the vehicle body vibration will trigger the integrated active suspension to enter the energy-dissipating mode. At this time, refer to... Figure 3 As shown, since the linear motor assembly is connected to an external power source, the electrical energy generated by the up-and-down movement of the coil 11 (a component of the linear motor assembly, which also includes the coil winding bearing 25, the coil outer cylinder 12, the lower end cover 15 of the mover, etc.) can be recovered, further reducing the energy consumption of this integrated active suspension and facilitating its widespread application.
[0046] When this integrated active suspension is in active drag mode, the magnetorheological damper assembly can achieve a very high damping coefficient with extremely low power consumption. The linear motor assembly requires very little force or no operation at all. Therefore, it has lower energy consumption compared to existing active suspensions such as electromagnetic active suspensions where drag is entirely generated by the linear motor assembly. At the same time, the rated force requirement of the linear motor assembly in this integrated active suspension is significantly reduced compared to existing active suspensions such as electromagnetic active suspensions. This leads to a significant reduction in the cost of the linear motor assembly and the integrated active suspension itself. In summary, this integrated active suspension has low cost and low energy consumption, and has broader market application potential.
[0047] When this integrated active suspension is in active thrust mode, compared with the existing semi-active suspension, this integrated active suspension can not only provide forces that resist motion, but also provide forces that promote motion, and the adjustable range of forces is larger, thus having a better control effect. This makes the integrated active suspension more flexible in control and has a better shock absorption effect.
[0048] This integrated active suspension features a compact overall structure with a small footprint, achieved by concentrically arranging the linear motor assembly, magnetorheological damper assembly, and tower spring 3. This facilitates installation on vehicles. Furthermore, even if the linear motor assembly fails unexpectedly, the magnetorheological damper assembly can still function normally, preventing extreme vibrations in the vehicle and enhancing the safety of this integrated active suspension.
[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An integrated active suspension, characterized by: The application relates to a linear motor assembly and a magnetorheological damper assembly, wherein the magnetorheological damper assembly is arranged on the central axis of the linear motor assembly, the upper portion of the magnetorheological damper assembly is provided with an end cover (1), the end cover (1) is sleeved with a spring tower (2), the top of the mover of the linear motor assembly is provided with a spring tray (23), the spring tray (23) and the spring tower (2) are provided with a tower-shaped spring (3). The bottom of the mover is fixedly connected with a mover lower end cover (15), the bottom surface of the mover lower end cover (15) is provided with a fork arm connecting piece (16), the bottom surface of the fork arm connecting piece (16) is fixedly connected with the movable end of the magnetorheological damper assembly, and the fork arm connecting piece (16) is sleeved with a fork arm (17).
2. An integrated active suspension according to claim 1, wherein: The magnetorheological damper assembly comprises a damper outer cylinder (22), an end cover connecting piece (18), a floating plug (21), a piston assembly (9), a piston rod (10), a guider (13) and a guider cover (31).
3. An integrated active suspension according to claim 2, wherein: The linear motor assembly comprises a magnetic isolation plate (6), an annular permanent magnet (26), an auxiliary motion structural piece (5), a carbon fiber permanent magnet outer cylinder (20), a stator upper end cover (4), a coil winding bearing (25), a coil (11), a coil outer cylinder (12), a fixed guide ring (7), a motor coil support (8), a bolt (24), a stator lower end cover (29) and a stator fixing nut (30).
4. An integrated active suspension according to claim 3, wherein: The magnetic isolation plate (6) is sleeved on the outer side surface of the damper outer cylinder (22), the stator fixing nut (30) is threadedly connected at the bottom of the outer side surface of the damper outer cylinder (22), and the guider cover (31) is fixedly connected at the bottom surface of the stator fixing nut (30) and used for limiting the guider (13).
5. An integrated active suspension according to claim 4, wherein: The fixed guide ring (7), the motor coil support (8) and the coil winding bearing (25) are slidingly connected on the outer side surface of the carbon fiber permanent magnet outer cylinder (20), and the coil outer cylinder (12) is fixedly connected with the motor coil support (8) and the mover lower end cover (15) through the bolt (24).
6. An integrated active suspension according to claim 5, wherein: The spring tray (23) is fixedly connected on the top surface of the motor coil support (8), and the fixed guide ring (7) and the motor coil support (8) are fixedly connected.
7. An integrated active suspension according to claim 6, wherein: The coil (11) is enveloped on the outer side surface of the coil winding bearing (25).
8. An integrated active suspension according to claim 7, wherein: The coil outer cylinder (12) is provided with a displacement sensor (27), the coil (11) is connected with a motor coil lead wire (32), and the motor coil lead wire (32) penetrates through the mover lower end cover (15) and is led out.
9. An integrated active suspension according to claim 8, wherein: The piston assembly (9) is fixedly connected with the piston rod (10), the piston assembly (9) is connected with an excitation coil lead wire (33), and the excitation coil lead wire (33) is led out from the bottom of the fork arm connecting piece (16) through the piston rod (10).
10. An integrated active suspension according to claim 9, wherein: The piston assembly (9) divides the space in the damper outer cylinder (22) into an upper chamber (19) and a lower chamber (28), and the guider cover (31) is sleeved with a buffer block (14).