Hybrid quasi-active damper based on magneto-rheological and voice coil motor structure

Abstract

The invention discloses a hybrid quasi-active damper based on magneto-rheological and voice coil motor structures, which belongs to the field of vehicle suspensions and comprises a piston assembly, an inner cylinder assembly and an outer cylinder assembly. The inner barrel assembly comprises an inner barrel body and a magnet assembly, and the outer barrel assembly comprises an outer barrel body and an electromagnetic coil for an outer barrel; the piston assembly is arranged in the inner cylinder body, and the inner cylinder body is arranged in the outer cylinder body; and the center positions of the magnet assembly and the electromagnetic coil for the outer cylinder are aligned. Compared with a pure active damper based on a motor, the damper is compact in structure, low in cost, better in safety and better in vibration reduction effect, and when the motor is out of control, the good vibration reduction effect can still be achieved through the electromagnetic characteristics of the magnetorheological fluid; compared with a semi-active damper, the controllable active force which counteracts friction force generated by relative movement of the inner cylinder, the outer cylinder, the piston rod, the guider and the like can be generated, and the comfort of a suspension is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle suspensions and also to the field of magnetorheology, and specifically to a hybrid semi-active damper based on a magnetorheological and voice coil motor structure. Background Art

[0002] With the development of industry and the continuous improvement of people's living quality, people's requirements for cars, an indispensable means of transportation in modern life, have also increased accordingly. Especially in terms of comfort, consumers no longer merely satisfy with the basic travel function of cars, but are more concerned about their smoothness during driving. The quality of vibration reduction technology is directly related to whether a car can effectively absorb and mitigate vibrations and impacts from the road surface during driving, thereby ensuring the riding experience of passengers. Traditional magnetorheological dampers are inadequate when faced with complex road conditions.

[0003] A magnetorheological damper belongs to a semi-active damper, which is a vibration reduction device that uses magnetorheological fluid to change its own viscosity under the action of a magnetic field to provide variable damping for the damper. The magnetorheological fluid is composed of a base fluid, magnetic particles, and additives. Through the action of an externally applied magnetic field, the rheological properties of the magnetorheological fluid can achieve a continuous reversible transformation from a liquid state to a quasi-solid state within milliseconds, thereby providing a controllable shear yield stress.

[0004] A pure active damper based on a motor can quickly and accurately control the magnitude and direction of the output force by changing the magnitude and direction of the current, and is suitable for occasions that require rapid response and high-precision control.

[0005] Existing magnetorheological dampers have a single structure and can only change the damping of the damper by changing the viscosity of the magnetorheological fluid, and cannot fully adapt to complex vibration environments, that is, they cannot provide active force, cannot achieve precise control of the damping force, and cannot adapt to complex road conditions. In addition, the friction generated by existing magnetorheological dampers during movement will also affect their vibration reduction effect, that is, their own friction cannot be ignored. Although a pure active damper based on a motor has a good vibration reduction effect, it has a high cost, a large volume, and cannot perform the vibration reduction function or even exacerbate the vibration when the motor is out of control. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a hybrid semi-active damper based on a magnetorheological and voice coil motor structure, including: a piston assembly, an inner cylinder assembly, and an outer cylinder assembly; the inner cylinder assembly includes an inner cylinder body and a magnet assembly, and the outer cylinder assembly includes an outer cylinder body and an outer cylinder electromagnetic coil; the piston assembly is disposed inside the inner cylinder body, and the inner cylinder body is disposed inside the outer cylinder body; the central positions of the magnet assembly and the outer cylinder electromagnetic coil are aligned.

[0007] The beneficial effects of the present invention are as follows:

[0008] The hybrid quasi-active damper based on the magnetorheological and voice coil motor structure of the present invention can, through the interaction between the electromagnetic coil for the outer cylinder disposed on the inner wall of the outer cylinder and the magnet assembly disposed in the inner cylinder, cooperate with a control algorithm to control the magnitude and direction of the current flowing into the electromagnetic coil for the outer cylinder, generating an active force that can completely compensate for the self-friction of the damper during movement. At the same time, by passing a current through the coil for the piston, the viscosity of the magnetorheological fluid in the magnetorheological fluid chamber is changed, realizing precise control of the damping force and active force of the damper, and improving its comfort, controllability and safety.

[0009] The present invention takes into account the characteristics that the friction force generated during the movement of the damper has a high frequency and a small amplitude. On the basis of the magnetorheological damper, a voice coil motor structure is added. The force generated by this structure has the characteristics of high precision and high response speed, and can realize complete compensation for the self-generated friction force of the damper during movement, thereby improving the comfort of the suspension.

[0010] The present invention integrates the outer cylinder buffer block at the end of the outer cylinder body and the magnetorheological fluid, ensuring that when the damper withstands a large impact or gets out of control, and when the piston movement is about to exceed the stroke of the damper, the magnetorheological fluid can provide resistance to the movement of the damper, and the outer cylinder buffer block can provide a resilience force to the damper, thereby increasing the force-bearing limit of the damper and improving its safety.

[0011] The present invention combines the voice coil motor structure with magnetorheological. Compared with the traditional pure active damper based on a motor, it has a compact structure, low cost, better safety and better vibration damping effect. When the motor gets out of control, it can still utilize the electromagnetic characteristics of the magnetorheological fluid to achieve a good vibration damping effect. Even if the electromagnetic coil for the piston also gets out of control, it can still utilize the zero-field viscosity of the magnetorheological fluid itself to achieve a certain vibration damping effect; compared with the traditional magnetorheological damper, i.e., the semi-active damper, the present invention can generate a controllable active force that cancels out the friction force generated by the relative movement between the inner and outer cylinders, the piston rod and the guide, etc., improving the comfort of the suspension. Description of the Drawings

[0012] Figure 1Cross-sectional view of the hybrid quasi-active damper based on the magnetorheological and voice coil motor structures of the present invention. Among them, 1 - upper connecting rod, 2 - upper connecting nut, 3 - upper spring tray, 4 - nozzle of the energy storage high-pressure air chamber, 5 - inner cylinder body, 6 - floating piston assembly, 7 - floating piston O-ring, 8 - floating piston guide strip, 9 - inner cylinder guide, 10 - upper piston end cover, 11 - piston guide strip, 12 - electromagnetic coil for the piston, 13 - magnetorheological fluid flow channel, 14 - lower piston end cover, 15 - lower spring tray, 16 - upper magnetic conductive plate for the outer cylinder electromagnetic coil, 17 - outer cylinder electromagnetic coil, 18 - outer magnetic conductive plate for the outer cylinder electromagnetic coil, 19 - lower magnetic conductive plate for the outer cylinder electromagnetic coil, 20 - magnet assembly, 21 - upper support for the outer cylinder electromagnetic coil, 22 - lower support for the outer cylinder electromagnetic coil, 23 - piston rod guide, 24 - piston rod guide bearing, 25 - lower connecting nut, 26 - outer cylinder bottom cover, 27 - outer cylinder buffer block, 28 - piston rod, 29 - electromagnetic coil lead wire, 30 - energy storage high-pressure air chamber, 31 - magnetorheological fluid chamber, 32 - bushing for the piston rod guide, 33 - magnet support, 34 - magnet fixing piece, 35 - outer cylinder body, 36 - inner cylinder buffer block, 37 - O-ring for the outer cylinder bottom cover, 38 - bushing for the inner cylinder guide, 39 - spring, 40 - O-ring for the inner cylinder guide, 41 - dust-proof oil seal for the inner cylinder guide, 42 - skeleton oil seal for the inner cylinder guide, 43 - skeleton oil seal for the piston rod guide, 44 - O-ring for the piston rod guide;

[0013] Figure 2 Cross-sectional view of the voice coil motor structure of the present invention. Among them, 16 - upper magnetic conductive plate for the outer cylinder electromagnetic coil, 17 - outer cylinder electromagnetic coil, 18 - outer magnetic conductive plate for the outer cylinder electromagnetic coil, 19 - lower magnetic conductive plate for the outer cylinder electromagnetic coil, 20 - magnet assembly. Detailed implementation manners

[0014] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0015] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. used in the present invention indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0016] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] As Figure 1 shown, the hybrid semi-active damper (or damper) based on the magnetorheological and voice coil motor structure of the present invention includes a piston assembly, an inner cylinder assembly, and an outer cylinder assembly; the inner cylinder assembly includes an inner cylinder body 5 and a magnet assembly 20, and the outer cylinder assembly includes an outer cylinder body 35 and an outer cylinder electromagnetic coil 17; the piston assembly is arranged inside the inner cylinder body 5, and the inner cylinder body 5 is arranged inside the outer cylinder body 35; the central positions of the magnet assembly 20 and the outer cylinder electromagnetic coil 17 are aligned.

[0018] The piston assembly includes: a piston upper end cover 10, a piston lower end cover 14, a piston electromagnetic coil 12, a magnetorheological fluid flow channel 13, an electromagnetic coil lead 29, and a piston rod 28.

[0019] Among them, the piston electromagnetic coil 12 is fixed between the piston upper end cover 10 and the piston lower end cover 14, and the piston upper end cover 10 and the piston lower end cover 14 are connected by pressing or other means. A plurality of annular grooves (concentric) are uniformly arranged on the upper surface of the piston upper end cover 10 and the lower surface of the piston lower end cover 14 respectively. The gaps between the plurality of annular grooves on the surfaces of the piston upper and lower end covers, the axial side walls of the piston upper and lower end covers, and the piston electromagnetic coil 12 form a magnetorheological fluid flow channel 13 (the magnetorheological fluid flows downward through the plurality of annular grooves on the upper surface of the piston upper end cover 10, the gap between the circumferential side wall of the piston upper end cover 10 and the upper half of the piston electromagnetic coil 12, the gap between the circumferential side wall of the piston lower end cover 14 and the lower half of the piston electromagnetic coil 12, and the plurality of annular grooves on the lower surface of the piston lower end cover 14). The shear force generated by the magnetorheological fluid flowing through the magnetorheological fluid flow channel 13 provides damping force for the damper. The piston rod 28 is fixedly connected to the piston lower end cover 14 by threads, and the electromagnetic coil lead 29 passes through the center of the piston rod and extends axially to the bottom end of the damper and is led out to the outside of the damper. Current is provided for the piston electromagnetic coil 12 and the outer cylinder electromagnetic coil 17 through the electromagnetic coil lead 29, so as to control the magnitude of the magnetic fields generated by the piston electromagnetic coil 12 and the outer cylinder electromagnetic coil 17.

[0020] The inner cylinder assembly includes: an inner cylinder body 5, an upper connecting rod 1, a spring 39, an upper spring tray 3, a lower spring tray 15, a high-pressure gas storage cavity nozzle 4, a floating piston assembly 6, a magnet assembly 20, a piston rod guide 23, a high-pressure gas storage cavity 30, a magnetorheological fluid cavity 31, a magnet support 33, a magnet fixing member 34, and an inner cylinder buffer block 36.

[0021] Among them, the upper connecting rod 1 and the upper spring tray 3 are fixed to the top end of the inner cylinder body 5. The upper connecting rod 1 passes through the axial center of the upper spring tray 3 and is used to connect to the vehicle chassis. The upper spring tray 3 connects to the upper end of the spring 39, and the lower spring tray 15 is fixed to the outer wall of the outer cylinder body 35 and connects to the lower end of the spring 39. The spring 39 is used to carry the vehicle body and provide stiffness for the damper.

[0022] The floating piston assembly 6 is installed in the upper part inside the inner cylinder body 5, and a high-pressure gas storage cavity 30 is formed between it and the top end of the inner cylinder body 5, which is used to provide force compensation for the return of the magnetorheological fluid.

[0023] The high-pressure gas storage cavity nozzle 4 is installed in the inner hole at the bottom end of the upper connecting rod 1 at the top end of the inner cylinder, and is used to fill high-pressure gas into the high-pressure gas storage cavity 30.

[0024] The inner cylinder buffer block 36 is located above the piston rod guide 23. Its function is to prevent the piston rod guide 23 from hitting the lower end cover 14 of the piston caused by the inner cylinder exceeding the stroke, resulting in damage to the damper. Above the inner cylinder buffer block 36 is the magnetorheological fluid cavity 31, which is filled with magnetorheological fluid. The piston head of the piston assembly (the piston upper end cover 10, the piston lower end cover 14, the magnetorheological fluid flow channel 13, and the piston electromagnetic coil 12 form the piston head) and a part of the piston rod 28 connecting the piston head are arranged therein.

[0025] A piston rod guide 23 is arranged between the inner cylinder body 5 and the piston rod 28. The piston rod guide 23 is fixed to the inner wall of the inner cylinder body 5 and is used to restrict the movement trajectory of the piston rod 28.

[0026] The magnet assembly 20 is fixedly installed below the bottom end of the inner cylinder body 5 through the magnet support 33 and the magnet fixing member 34.

[0027] The outer cylinder assembly includes: an outer cylinder body 35, an inner cylinder guide 9, an upper magnetic conductive plate for the outer cylinder electromagnetic coil 16, an outer cylinder electromagnetic coil 17, an outer magnetic conductive plate for the outer cylinder electromagnetic coil 18, a lower magnetic conductive plate for the outer cylinder electromagnetic coil 19, an upper support for the outer cylinder electromagnetic coil 21, a lower support for the outer cylinder electromagnetic coil 22, an outer cylinder bottom cover 26, and an outer cylinder buffer block 27 (rubber buffer block).

[0028] Among them, the inner cylinder guide 9 is installed at the uppermost end of the inner wall of the outer cylinder body 35, and the inner cylinder guide 9 is used to restrict the movement trajectory of the inner cylinder body 5.

[0029] The upper magnetic conductive plate 16 of the electromagnetic coil for the outer cylinder and the lower magnetic conductive plate 19 of the electromagnetic coil for the outer cylinder are respectively fixed at different heights on the inner wall of the outer cylinder body 35 through the upper support member 21 of the electromagnetic coil for the outer cylinder and the lower support member 22 of the electromagnetic coil for the outer cylinder. The outer magnetic conductive plate 18 of the electromagnetic coil for the outer cylinder is arranged between the upper magnetic conductive plate 16 of the electromagnetic coil for the outer cylinder and the lower magnetic conductive plate 19 of the electromagnetic coil for the outer cylinder on the inner wall of the outer cylinder body 35. As Figure 2 shown, the electromagnetic coil 17 for the outer cylinder is fixed between the upper magnetic conductive plate 16 of the electromagnetic coil for the outer cylinder, the outer magnetic conductive plate 18 of the electromagnetic coil for the outer cylinder, and the lower magnetic conductive plate 19 of the electromagnetic coil for the outer cylinder, with a certain gap from the magnet assembly 20 fixed inside the inner cylinder body 5, and forms a voice coil motor structure. Among them, the upper support member 21 of the electromagnetic coil for the outer cylinder is integrally arranged with the outer cylinder body 35, and the lower support member 22 of the electromagnetic coil for the outer cylinder is separately arranged, and both are fixed on the inner wall of the outer cylinder body 35; the upper magnetic conductive plate 16 of the electromagnetic coil for the outer cylinder, the lower magnetic conductive plate 19 of the electromagnetic coil for the outer cylinder, and the outer magnetic conductive plate 18 of the electromagnetic coil for the outer cylinder are separately arranged and fixed on the inner wall of the outer cylinder body 35.

[0030] The outer cylinder buffer block 27 is arranged inside the outer cylinder body 35 at the end of the outer cylinder body 35 to prevent the components below the inner cylinder body 5 from hitting the outer cylinder bottom cover 26 beyond the stroke and causing damage to the damper.

[0031] The outer cylinder bottom cover 26 is fixed at the bottom end of the outer cylinder body 35, and the lower end of the piston rod 28 passes through the outer cylinder bottom cover 26 and is fixedly connected to the outer cylinder bottom cover 26 by threads or other means, so that the piston assembly and the outer cylinder assembly remain relatively stationary.

[0032] The hybrid semi-active damper based on the magnetorheological and voice coil motor structure of the present invention is of a double-cylinder structure. During installation, the piston assembly is placed into the inner cylinder body 5 from above the inner cylinder body 5, and then the floating piston assembly 6 and the energy storage high-pressure gas chamber nozzle 4 are sequentially installed above the inner cylinder body 5. Gas is filled into the energy storage high-pressure gas chamber 30 through the energy storage high-pressure gas chamber nozzle 4 to provide force compensation for the return of the magnetorheological fluid, and the lower end surface of the inner cylinder is fixed with the magnet assembly 20 through the magnet fixing member 33 and the magnet support member 33.

[0033] The inner cylinder guide 9 is fixed inside the outer cylinder body 35, as well as the electromagnetic coil 17 for the outer cylinder, the upper magnetic conductive plate 16 of the electromagnetic coil for the outer cylinder, the outer magnetic conductive plate 18 of the electromagnetic coil for the outer cylinder, and the lower magnetic conductive plate 19 of the electromagnetic coil for the outer cylinder in the voice coil motor structure. Then, the inner cylinder body 5 with the piston assembly installed is placed into the outer cylinder body 35. The upper spring tray 3 of the inner cylinder assembly is fixedly connected to the upper end of the spring 39, the central positions of the magnet assembly 20 and the electromagnetic coil 17 for the outer cylinder are aligned, and the lower end of the spring 39 is fixedly connected to the lower spring tray 15. Finally, the outer cylinder bottom cover 26 is covered, and the piston rod 28 passes through the outer cylinder bottom cover 26.

[0034] During the operation of the damper of the present invention, the outer cylinder body 35 is relatively stationary with respect to the piston assembly, and the inner cylinder assembly moves relative to the outer cylinder body 35 and the piston assembly.

[0035] Among them, the piston rod 28 is fixed to the bottom cover 26 of the outer cylinder by the lower connecting nut 25, and the static seal between the piston rod 28 and the bottom cover 26 of the outer cylinder is ensured by the O-ring 37 of the bottom cover of the outer cylinder. The bottom cover 26 of the outer cylinder is fixedly connected to the outer cylinder body 35 by circumferential seam welding or other means to meet the sealing and tensile and compressive strength requirements for the operation of the damper.

[0036] In addition, the upper connecting rod 1 is fixed to the upper spring tray 3 by the upper connecting nut 2; the inner cylinder guide 9 realizes the axial movement guiding and dynamic sealing with the inner cylinder 5 by means of the dust-proof oil seal 41 of the inner cylinder guide, the bushing 38 of the inner cylinder guide, and the skeleton oil seal 42 of the inner cylinder guide; the inner cylinder guide 9 also realizes the static seal with the outer cylinder body 35 through the O-ring 40 of the inner cylinder guide.

[0037] The piston rod guide 23 realizes the axial movement guiding and dynamic sealing with the piston rod 28 by means of the piston rod guide bearing 24, the bushing 32 of the piston rod guide, and the skeleton oil seal 43 of the piston rod guide; the piston rod guide 23 also realizes the static seal with the piston rod 28 through the O-ring 44 of the piston rod guide.

[0038] The piston electromagnetic coil 12 is wound around the coil skeleton, and the coil skeleton is fixed to the upper end of the piston rod 28 by the upper end cover 10 of the piston and the lower end cover 14 of the piston. The contact surface between the piston electromagnetic coil 12 and the coil skeleton is insulated by insulating paint. The outside of the piston electromagnetic coil 12 is coated with epoxy resin to achieve its fixation (fixing each turn of the coil together) and insulation, and a piston guide band 11 is installed outside the epoxy resin to realize the guiding of the piston.

[0039] The floating piston O-ring 7 and the floating piston guide band 8 are installed at the position where the outer side of the floating piston assembly 6 contacts the inner cylinder body 5 to realize the axial movement guiding, static seal, and dynamic seal of the floating piston assembly 6.

[0040] When the vehicle suspension moves, an electric current is passed through the outer cylinder electromagnetic coil 17 through the electromagnetic coil lead 29. According to the Ampere's force principle, a current-carrying conductor will be subjected to a force in a magnetic field, that is, the outer cylinder electromagnetic coil 17 will be affected by the magnetic field of the magnet assembly 20, thereby generating a force in the axial direction to drive the outer cylinder electromagnetic coil 17 to drive the outer cylinder body 35 to move axially relative to the inner cylinder, which is the working principle of the voice coil motor. Since the position of the outer cylinder body 35 is fixed, according to Newton's third law, that is, the principle of action and reaction, the magnet assembly 20 will drive the inner cylinder body and its internal components 5 to move relative to the outer cylinder body 35.

[0041] When the damper of the present invention is working, the electromagnetic coil 12 for the piston and the electromagnetic coil 17 for the outer cylinder can be controlled respectively, so that the magnetorheological fluid in the magnetorheological fluid chamber 31 and the voice coil motor structure work together. When the damper needs a large damping force, a large current is passed through the electromagnetic coil 12 for the piston to provide an enhanced magnetic field, making the magnetorheological fluid more viscous and increasing the damping force; when the damper needs a small damping force, a small current or no current is passed through the electromagnetic coil 12 for the piston, reducing the viscosity of the magnetorheological fluid and decreasing the damping force.

[0042] While performing the above semi-active control, a current is passed through the electromagnetic coil 17 for the outer cylinder. The magnetic field generated by it interacts with the magnet assembly 20. With a suitable control algorithm, an active force with the characteristics of high precision and high response speed is generated, thereby completely compensating for the friction force generated by the damper itself during movement and improving the comfort of the suspension.

[0043] By combining the voice coil motor structure with magnetorheology, the present invention has a more compact structure, lower cost, better safety, and better vibration damping effect compared with traditional pure active dampers based on motors. When the motor is out of control, the electromagnetic characteristics of the magnetorheological fluid can still be used to achieve a good vibration damping effect. Even if the electromagnetic coil 12 for the piston is also out of control, a certain vibration damping effect can still be achieved using the zero-field viscosity of the magnetorheological fluid itself; compared with traditional magnetorheological dampers, i.e., semi-active dampers, the present invention can generate a controllable active force that cancels out the friction forces generated at positions such as between the inner and outer cylinders and between the piston rod and the guide, improving the comfort of the suspension.

[0044] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. All inventions created using the concept of the present invention are within the scope of protection.

Claims

1. A hybrid quasi-active damper based on magnetorheological and voice coil motor structure, characterized in that: include: A piston assembly, an inner cylinder assembly and an outer cylinder assembly; the inner cylinder assembly comprises an inner cylinder body (5) and a magnet assembly (20), and the outer cylinder assembly comprises an outer cylinder body (35) and an outer cylinder electromagnetic coil (17); the piston assembly is arranged in the inner cylinder body (5), and the inner cylinder body (5) is arranged in the outer cylinder body (35); the center positions of the magnet assembly (20) and the outer cylinder electromagnetic coil (17) are aligned.

2. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 1 is characterized in that: The inner cylinder assembly further comprises: a magnet support member (33) and a magnet fixing member (34); the magnet assembly (20) is fixedly mounted below the bottom end of the inner cylinder body (5) via the magnet support member (33) and the magnet fixing member (34).

3. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 1 or 2, characterized in that: The inner cylinder assembly further comprises: an upper connecting rod (1), a spring (39), an upper spring tray (3), a lower spring tray (15), an energy storage high-pressure air chamber nozzle (4), a floating piston assembly (6), a piston rod guide (23), an energy storage high-pressure air chamber (30), a magnetorheological fluid chamber (31), and an inner cylinder buffer block (36); wherein the upper connecting rod (1) and the upper spring tray (3) are fixed to the top of the inner cylinder body (5), and the upper connecting rod (1) passes through the axial center of the upper spring tray (3); the upper spring tray (3) is connected to the upper end of the spring (39), and the lower spring tray (15) is fixed to the outer wall of the outer cylinder body (35) and connected to the lower end of the spring (39); the floating piston assembly (6) is arranged at the upper part of the inner cylinder body (5) and is in contact with the inner cylinder body (5). An energy storage high-pressure air chamber (30) is formed between the top ends of the inner cylinder body (5); an energy storage high-pressure air chamber nozzle (4) is arranged in an inner hole at the top end of the inner cylinder and the bottom end of the upper connecting rod (1); an inner cylinder buffer block (36) is arranged above the piston rod guide (23); a magnetorheological fluid chamber (31) is arranged above the inner cylinder buffer block (36); in the piston assembly, a piston head composed of a piston upper end cover (10), a piston lower end cover (14), a magnetorheological fluid flow channel (13) and a piston electromagnetic coil (12) and a part of the piston rod (28) connected to the piston head are arranged in the magnetorheological fluid chamber (31); a piston rod guide (23) is arranged between the inner cylinder body (5) and the piston rod (28), and the piston rod guide (23) is fixed to the inner wall of the inner cylinder body (5).

4. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 1, characterized in that: The outer cylinder assembly further comprises: an upper magnetic conductive plate (16) for the outer cylinder electromagnetic coil, an outer magnetic conductive plate (18) for the outer cylinder electromagnetic coil, a lower magnetic conductive plate (19) for the outer cylinder electromagnetic coil, an upper support member (21) for the outer cylinder electromagnetic coil, and a lower support member (22) for the outer cylinder electromagnetic coil; wherein the upper magnetic conductive plate (16) for the outer cylinder electromagnetic coil and the lower magnetic conductive plate (19) for the outer cylinder electromagnetic coil are respectively fixed to the inner wall of the outer cylinder body (35) through the upper support member (21) for the outer cylinder electromagnetic coil and the lower support member (22) for the outer cylinder electromagnetic coil. The outer cylinder electromagnetic coil outer magnetic conductive plate (18) is arranged between the outer cylinder electromagnetic coil upper magnetic conductive plate (16) and the outer cylinder electromagnetic coil lower magnetic conductive plate (19) and on the inner wall of the outer cylinder body (35); the outer cylinder electromagnetic coil (17) is fixed between the outer cylinder electromagnetic coil upper magnetic conductive plate (16), the outer cylinder electromagnetic coil outer magnetic conductive plate (18) and the outer cylinder electromagnetic coil lower magnetic conductive plate (19), and has a certain gap with the magnet assembly (20) fixed in the inner cylinder body (5), thereby forming a voice coil motor structure.

5. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 1 or 4, characterized in that: The outer cylinder assembly further comprises: an outer cylinder bottom cover (26) and an outer cylinder buffer block (27); the outer cylinder buffer block (27) is arranged inside the outer cylinder body (35) and at the end of the body; the outer cylinder bottom cover (26) is fixed to the bottom end of the outer cylinder body (35), and the lower end of the piston rod (28) passes through the outer cylinder bottom cover (26) and is fixedly connected to the outer cylinder bottom cover (26).

6. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 1 or 4, characterized in that: The outer cylinder assembly further comprises an inner cylinder guide (9) arranged at the uppermost end of the inner wall of the outer cylinder body (35).

7. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 4, characterized in that: The upper support member (21) of the electromagnetic coil for the outer cylinder is integrally arranged with the outer cylinder body (35), and the lower support member (22) of the electromagnetic coil for the outer cylinder is separately arranged, and both are fixed to the inner wall of the outer cylinder body (35); the upper magnetic conductive plate (16) of the electromagnetic coil for the outer cylinder, the lower magnetic conductive plate (19) of the electromagnetic coil for the outer cylinder, and the outer magnetic conductive plate (18) of the electromagnetic coil for the outer cylinder are separately arranged and fixed to the inner wall of the outer cylinder body (35).

8. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 1, characterized in that: The piston assembly comprises: an upper piston cover (10), a lower piston cover (14), an electromagnetic coil for the piston (12), a magnetorheological fluid flow channel (13), an electromagnetic coil outlet wire (29), and a piston rod (28); wherein the electromagnetic coil for the piston (12) is fixed between the upper piston cover (10) and the lower piston cover (14), and the upper piston cover (10) and the lower piston cover (14) are snap-fitted and connected; the upper surface of the upper piston cover (10) and the lower surface of the lower piston cover (14) are evenly provided with A plurality of co-centric annular grooves are provided, and the plurality of co-centric annular grooves on the upper surface of the piston upper end cover (10) and the lower surface of the piston lower end cover (14), the gap between the axial side walls of the piston upper end cover (10) and the piston lower end cover (14), and the electromagnetic coil (12) for the piston form a magnetorheological fluid flow channel (13); the piston rod (28) is fixedly connected to the piston lower end cover (14), and the electromagnetic coil output line (29) passes through the center of the piston rod and leads to the outside of the hybrid quasi-active damper based on the magnetorheological and voice coil motor structure.

9. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 1, characterized in that: The upper connecting rod (1) is fixed to the spring upper tray (3) via an upper connecting nut (2).

10. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 3, characterized in that: The piston electromagnetic coil (12) is wound on a coil frame, and the coil frame is fixed to the upper end of the piston rod (28) through the piston upper end cover (10) and the piston lower end cover (14). The contact surface between the piston electromagnetic coil (12) and the coil frame is insulated by insulating paint. The outside of the piston electromagnetic coil (12) is coated with epoxy resin to achieve its fixation and insulation. A piston guide belt (11) is installed outside the epoxy resin to achieve the guidance of the piston.

11. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 3, characterized in that: The piston rod guide (23) is composed of a piston rod guide bearing (24), a piston rod guide bushing (32), a piston rod guide frame oil seal (43) and a piston rod guide O-ring (44). The piston rod guide (23) achieves axial motion guidance and dynamic sealing with the piston rod (28) by means of the piston rod guide bearing (24), the piston rod guide bushing (32) and the piston rod guide frame oil seal (43); the piston rod guide (23) also achieves static sealing with the piston rod (28) through the piston rod guide O-ring (44).

12. The hybrid quasi-active damper based on magnetorheological fluid and voice coil motor structure according to claim 4, characterized in that: The inner cylinder guide (9) is composed of an inner cylinder guide dustproof oil seal (41), an inner cylinder guide framework oil seal (42), an inner cylinder guide O-ring (40), and an inner cylinder guide bushing (38). The inner cylinder guide (9) achieves axial motion guidance and dynamic sealing with the inner cylinder (5) by means of the inner cylinder guide dustproof oil seal (41), the inner cylinder guide bushing (38), and the inner cylinder guide framework oil seal (42); the inner cylinder guide (9) also achieves static sealing with the outer cylinder body (35) by means of the inner cylinder guide O-ring (40).

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