Integrated active suspension

Abstract

The integrated active suspension comprises a linear motor assembly and a magneto-rheological damper assembly, the magneto-rheological damper assembly is arranged on the central axis of the linear motor assembly, an end cover is arranged on the upper portion of the magneto-rheological damper assembly, the end cover is sleeved with a spring tower, a spring tray is arranged at the top of a rotor of the linear motor assembly, and the spring tray is arranged on the top of the rotor of the linear motor assembly. A tower-shaped spring is arranged between the spring tray and the spring tower, the bottom of a rotor of the linear motor assembly is fixedly connected with a rotor lower end cover, a fork arm connecting piece is arranged on the bottom face of the rotor lower end cover, and the bottom face of the fork arm connecting piece is fixedly connected with the movable end of the magnetorheological damper assembly. The magneto-rheological damper assembly can achieve a great damping coefficient with extremely low power consumption, and the linear motor assembly needs to provide extremely small force or does not need to work, so that the integrated active suspension is low in cost and energy consumption and has wider market application potential.

Description

Technical Field

[0001] The invention relates to the technical field of automobile suspensions, in particular to an integrated active suspension. Background Art

[0002] As a very important component of a vehicle, vehicle suspension plays an extremely critical role in ride comfort, driving stability and safety during driving. Traditional passive suspension mainly dissipates energy through friction, thereby generating corresponding damping force to achieve the effect of vibration reduction. However, the stiffness and damping force of traditional passive suspension are unchanged. If the vehicle is driving on a road with complex road conditions, the vibration reduction effect of the passive suspension cannot meet expectations.

[0003] With the continuous development of technology, semi-active suspension has gradually replaced traditional passive suspension. The semi-active suspension that is currently more widely used is mainly 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 effect. However, semi-active suspension also has certain problems, that is, the adjustment range of damping force is very limited, and because it can only generate force that hinders movement, the adjustment is not flexible. Therefore, active suspension that can generate main power came into being. Since it can generate both damping force and main power to promote movement, the active suspension is more flexible in adjustment according to road conditions, thereby achieving better control effect.

[0004] However, the current active suspension has high energy consumption and high cost, which creates a huge obstacle to its popularization. Therefore, an integrated active suspension is proposed. Summary of the invention

[0005] The object of the present invention is to provide an integrated active suspension to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an integrated active suspension, comprising 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, an end cover is arranged on the upper part of the magnetorheological damper assembly, a spring tower is sleeved on the end cover, a spring tray is arranged on the top of the mover of the linear motor assembly, and a tower spring is arranged between the spring tray and the spring tower;

[0007] The bottom of the mover of the linear motor assembly is fixedly connected to the mover lower end cover, the bottom surface of the mover lower end cover is provided with a fork arm connector, the bottom surface of the fork arm connector is fixedly connected to the movable end of the magnetorheological damper assembly, and the fork arm is sleeved on the fork arm connector.

[0008] Preferably, the magnetorheological damper assembly comprises a damper outer cylinder, an end cover connector, a floating plug, a piston assembly, a piston rod, a guide and a guide cover.

[0009] Preferably: the linear motor assembly includes a magnetic isolation 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, a bolt, a stator lower end cover, and a stator fixing nut.

[0010] Preferably: the magnetic isolation plate is sleeved on the outer side surface of the damper outer tube, the stator fixing nut is threadedly connected to the bottom of the outer side surface of the damper outer tube, 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 coil 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 wrapped around the outer side of the coil winding bearing.

[0014] Preferably: a displacement sensor is arranged 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 then leads out.

[0015] Preferably, the piston assembly is fixedly connected to the piston rod, the piston assembly is connected to an excitation coil lead, and the excitation coil lead passes through the piston rod and is led out from the bottom of the fork arm connector.

[0016] Preferably, the piston assembly divides the space in the damper outer cylinder into an upper chamber and a lower chamber in the damper outer cylinder, and a buffer block is sleeved on the guide cover.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This device utilizes that when it is in active resistance mode, the magnetorheological damper assembly can achieve a very large damping coefficient with extremely low power consumption, and requires very little force from the linear motor assembly or no linear motor assembly is required to work, making this integrated active suspension low in cost and energy consumption, and has a wider market application potential.

[0019] 2. This device utilizes the fact that the vibration of the vehicle body will stimulate the device to be in the energy feeding mode when the linear motor assembly does not provide force. At this time, the electric 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 promotion and application.

[0020] 3. This device can provide not only a force to hinder movement but also a force to promote movement, and the adjustable range of the force is larger, so it has a better control effect, thereby making the device more flexible to control and having a better shock absorption effect.

[0021] 4. This device arranges the linear motor assembly, magnetorheological damper assembly and concentrically with the conical spring, which not only has a compact structure and small footprint, but also facilitates its installation. When the linear motor assembly fails due to an accident, the magnetorheological damper assembly can still work normally, thus avoiding extreme vibration of the vehicle and making the integrated active suspension safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a connection diagram of the linear motor assembly and the magnetorheological damper assembly in the present invention;

[0025] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0026] Figure 4 for Figure 3 A magnified schematic diagram of center A.

[0027] In the figure: 1. end cover; 2. spring tower; 3. tower spring; 4. stator upper end cover; 5. auxiliary motion structure; 6. magnetic isolation 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 cover; 16. fork arm connector; 17. fork arm; 18. end cover connector; 19. upper chamber; 20. carbon fiber permanent magnet outer cylinder; 21. floating plug; 22. damper outer cylinder; 23. spring tray; 24. bolt; 25. coil winding bearing; 26. annular permanent magnet; 27. displacement sensor; 28. lower chamber; 29. ​​stator lower end cover; 30. stator fixing nut; 31. guide cover; 32. motor coil lead; 33. excitation coil lead. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments 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.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] Reference Figure 1-4 As shown, the present invention provides a technical solution of an integrated active suspension:

[0032] Reference Figure 1As shown, an integrated active suspension includes 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, and an end cover 1 is arranged on the upper part of the magnetorheological damper assembly, which is used to connect with the vehicle body and is located at the upper end of the integrated active suspension, and a spring tower 2 is sleeved on the outer side of the end cover 1, and a spring tray 23 is arranged on the top of the mover of the linear motor assembly, and a tower spring 3 is arranged between the spring tray 23 and the spring tower 2, wherein it should be supplemented that the material of the tower spring 3 can be selected from silicon manganese steel material, which is a tower-shaped structure for providing rigidity to support the vehicle body, and its lower end is ground flat for more stable fitting on the top surface of the spring tray 23, and accordingly, the spring tray 23 is arranged to cooperate with the installation of the tower spring 3.

[0033] The real-time adjustable force of the 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 the integrated active suspension.

[0034] It should be noted that the linear motor assembly and the magnetorheological damper assembly are in parallel. Figure 3 It can be seen that the linear motor assembly includes a stator and a mover. The stator of the linear motor assembly and the non-active part of the magnetorheological damper assembly are fixedly connected, and the mover of the linear motor assembly can repeatedly move along its central axis under the vibration of the vehicle body, where the elasticity of the conical spring 3 is utilized.

[0035] The integrated active suspension has three working modes, namely: energy feeding mode, active resistance mode and active thrust mode.

[0036] Among them, energy feedback mode: when the car body vibrates, the mover of the linear motor assembly will cut the magnetic flux lines to generate electrical energy, which can be recovered.

[0037] Active resistance mode: When the integrated active suspension needs to provide a force opposite to the direction of vehicle body vibration, the required force is first provided by the magnetorheological damper assembly, and the part of the required force that cannot be met is provided by the linear motor assembly. Due to the characteristics of the magnetorheological damper assembly, a large damping force can be achieved with extremely small power, so the power consumption of the integrated active suspension under this working condition is significantly reduced compared with the traditional active suspension.

[0038] Active thrust mode: When the integrated active suspension needs to provide a force in the same direction as the vibration, the required force can only be provided by the linear motor assembly. In order to reduce the energy consumption under this working condition, the damping coefficient of the magnetorheological damper assembly is adjusted to the lowest to reduce the damping force in the opposite direction of the vehicle body vibration to the minimum.

[0039] Among them, the bottom of the mover of the linear motor assembly is fixedly connected to the mover lower end cover 15, and the bottom surface of the mover 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. The fork arm connector 16 is sleeved with a fork arm 17, which is also used to connect to the vehicle body and is located at the lower end of the integrated active suspension.

[0040] Furthermore, it should be supplemented that the magnetorheological damper assembly includes a damper outer tube 22 , an end cover connector 18 , a float 21 , a piston assembly 9 , a piston rod 10 , a guide 13 and a guide cover 31 .

[0041] Among them, it should be supplemented that the end cover connector 18 not only serves to connect the end cover 1, but also seals the magnetorheological fluid located in the outer tube 22 of the damper. The float plug 21 is arranged above the piston assembly 9 to compensate for the volume of the piston assembly 9, and the guide 13 is provided with a piston rod dynamic seal and a guide sleeve, which play the role of sealing and guiding the magnetorheological fluid located in the outer tube 22 of the damper.

[0042] The linear motor assembly includes a magnetic isolation plate 6, an annular 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, a bolt 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] Among them, it should be supplemented that the magnetic isolation plate 6 is sleeved on the outer side surface of the damper outer cylinder 22, wherein the magnetic isolation plate 6 has the function of magnetic isolation to prevent the magnetic field of the annular permanent magnet 26 from affecting the magnetorheological fluid of the internal magnetorheological damper assembly. At the same time, the annular permanent magnet 26 is sleeved on the magnetic isolation plate 6, and the carbon fiber permanent magnet outer cylinder 20, as the name suggests, is located on the outside of the annular permanent magnet 26. It can be made of carbon fiber material, which not only guides the movement of the rotor of the linear motor assembly, but also provides installation space for the annular permanent magnet 26. The stator fixing nut 30 is threadedly connected to the bottom of the outer side surface 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. The guide 13, the fixed guide ring 7, the motor coil support 8 and the coil winding bearing 25 are slidably connected to the outer side of the carbon fiber permanent magnet outer cylinder 20, the coil 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 and the motor coil support 8 are fixedly connected, and the coil 11 is enveloped on the outer side of the coil winding bearing 25. It should be supplemented that the coil winding bearing 25 is not only conducive to the winding envelope process of the coil 11, but also plays a guiding role in the movement of the mover of the linear motor assembly. A displacement sensor 27 is arranged on the coil outer cylinder 12, which is used to monitor the coil The outer cylinder 12 moves, and it should be noted that, in order to facilitate the sensing of the displacement sensor 27, a certain distance is set between the coil outer cylinder 12 and the coil 11, and the coil 11 is connected to a motor coil lead 32 for connecting to an external power supply. The motor coil lead 32 is led out from the lower end cover 15 of the mover after passing through, and the piston assembly 9 and the piston rod 10 are fixedly connected. It should be noted that the piston rod 10 is the active end of the magnetorheological damper assembly, and the piston assembly 9 is connected to the excitation coil lead 33. It should be noted that the damper outer cylinder 22 provides a accommodating space, which is not only used to set the piston assembly 9, the piston rod 10, etc., but also used to accommodate the magnetorheological fluid. The piston assembly 9 is provided with There is an annular flow channel for connecting the upper chamber 19 and the lower chamber 28. The interior of the piston assembly 9 also includes an excitation coil, which is used to generate a magnetic field. By applying different current magnitudes, 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 a prior art and will not be elaborated on 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 tube 22 into an upper chamber 19 and a lower chamber 28. A buffer block 14 is sleeved on the guide cover 31 to reduce the wear between the internal structures of the integrated active suspension caused by vehicle body vibration during operation.

[0044] The working principle of the integrated active suspension is now explained through its working process in the energy feeding mode, active resistance mode and active thrust mode:

[0045] The integrated active suspension is installed on the vehicle. When the vehicle is in a bumpy state, as long as the linear motor assembly is in a state of not providing force, the body vibration will stimulate the integrated active suspension to be in the energy feeding mode. At this time, refer to Figure 3 As shown, since the linear motor assembly is connected to an external power supply, the electrical energy generated by the up and down movement of the coil 11 (a component of the linear motor assembly, which also includes a coil winding bearing 25, a coil outer cylinder 12, a mover lower end cover 15, etc.) can be recovered, further reducing the energy consumption of the integrated active suspension and facilitating its promotion and application.

[0046] When the integrated active suspension is in active resistance mode, the magnetorheological damper assembly can achieve a very large damping coefficient with extremely low power consumption, and requires very little force from the linear motor assembly or no linear motor assembly is required to work. Therefore, compared with active suspensions such as existing electromagnetic active suspensions in which all resistance is generated by the force provided by the linear motor assembly, the integrated active suspension has lower energy consumption. At the same time, the rated force requirement of the linear motor assembly of the integrated active suspension is greatly reduced compared with active suspensions such as existing electromagnetic active suspensions, which leads to a significant reduction in the cost of the linear motor assembly and even the integrated active suspension. In summary, the integrated active suspension has low cost, low energy consumption, and has broader market application potential.

[0047] When the integrated active suspension is in active thrust mode, compared with the existing semi-active suspension, the integrated active suspension can not only provide force to hinder movement, but also provide force to promote movement, and the adjustable range of force is larger, so it has better control effect, which makes the integrated active suspension more flexible to control and has better shock absorption effect.

[0048] The integrated active suspension arranges the linear motor assembly, the magnetorheological damper assembly and the conical spring 3 concentrically, so that the overall structure is compact and occupies less space, which facilitates the installation of the integrated active suspension on the vehicle. At the same time, when the linear motor assembly fails due to an accident, the magnetorheological damper assembly can still work normally, avoiding extreme vibration of the vehicle, making the integrated active suspension safer.

[0049] 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. An integrated active suspension, characterized in that: The invention comprises 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, an end cover (1) is arranged on the upper part of the magnetorheological damper assembly, a spring tower (2) is sleeved on the end cover (1), a spring tray (23) is arranged on the top of the mover of the linear motor assembly, and a tower spring (3) is arranged between the spring tray (23) and the spring tower (2); The bottom of the mover of the linear motor assembly is fixedly connected to 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 to the movable end of the magnetorheological damper assembly, and the fork arm connecting piece (16) is sleeved with a fork arm (17).

2. The integrated active suspension according to claim 1, characterized in that: The magnetorheological damper assembly comprises a damper outer cylinder (22), an end cover connector (18), a floating plug (21), a piston assembly (9), a piston rod (10), a guide (13) and a guide cover (31).

3. The integrated active suspension according to claim 2, characterized in that: The linear motor assembly comprises a magnetic isolation plate (6), an annular 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), a bolt (24), a stator lower end cover (29), and a stator fixing nut (30).

4. The integrated active suspension according to claim 3, characterized in that: The magnetic isolation plate (6) is sleeved on the outer side surface of the damper outer tube (22), the stator fixing nut (30) is threadedly connected to the bottom of the outer side surface of the damper outer tube (22), and the guide cover (31) is fixedly connected to the bottom surface of the stator fixing nut (30) and is used to limit the guide (13).

5. The integrated active suspension according to claim 4, characterized in that: The fixed guide ring (7), the motor coil support (8) and the coil winding bearing (25) are slidably connected to the outer side of the carbon fiber permanent magnet outer cylinder (20), and the coil outer cylinder (12) is fixedly connected to the motor coil support (8) and the lower end cover (15) of the mover by bolts (24).

6. The integrated active suspension according to claim 5, characterized in that: The spring tray (23) is fixedly connected to 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. The integrated active suspension according to claim 6, characterized in that: The coil (11) is wrapped around the outer side of the coil winding bearing (25).

8. The integrated active suspension according to claim 7, characterized in that: A displacement sensor (27) is provided on the coil outer cylinder (12); the coil (11) is connected to a motor coil lead (32); the motor coil lead (32) penetrates through the lower end cover (15) of the mover and is then led out.

9. The integrated active suspension according to claim 8, characterized in that: The piston assembly (9) and the piston rod (10) are fixedly connected, and the piston assembly (9) is connected to an excitation coil lead (33), and the excitation coil lead (33) passes through the piston rod (10) and is led out from the bottom of the fork arm connecting piece (16).

10. The integrated active suspension according to claim 9, characterized in that: The piston assembly (9) is inside the damper outer tube (22) to divide the space inside the damper outer tube (22) into an upper chamber (19) and a lower chamber (28), and a buffer block (14) is sleeved on the guide cover (31).

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