Inerter synergy type electromagnetic energy feedback suspension system

Abstract

The invention relates to the technical field of suspensions, and provides an inerter synergistic type electromagnetic energy feedback suspension system which is characterized in that a first screw rod assembly is combined with a flywheel and is connected with a shock absorber shell through a bearing; a flywheel can be disposed within the cavity of the damper housing. The permanent magnet synchronous motor can be fixedly arranged in the shock absorber shell, and a power output shaft of the permanent magnet synchronous motor is connected with an electromagnetic energy feedback structure formed by a second lead screw assembly. The auxiliary spring is connected with the electromagnetic damper in parallel and is connected with the inerter in series to form a tuning unit. The vibration in the inerter tuning configuration is not synchronous with the main body structure, and the asynchronous vibration enables the relative displacement in the system to be amplified, so that the working rotating speed of the motor is remarkably increased, and efficient power generation is realized. According to the suspension system provided by the invention, the inertial tuning configuration can be introduced into the electromagnetic energy feedback suspension, so that the energy conversion efficiency of the system is remarkably improved, meanwhile, the performance contradiction in the electromagnetic energy feedback suspension is solved, and the effective decoupling of the vibration reduction performance and the power generation efficiency is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of suspensions, and particularly to an inertia-increasing electromagnetic energy-harvesting suspension system. Background Art

[0002] At present, with the booming development of the new energy vehicle industry, improving the overall vehicle energy utilization efficiency has become a core key that urgently needs to be broken through in the field of technological innovation. A large number of research results clearly show that when a new energy vehicle is driving under ordinary urban road conditions, the energy consumed by the suspension damper accounts for a very considerable proportion, up to more than 20% of the engine output energy. However, unfortunately, this part of the energy is not effectively utilized, but is unreservedly released into the environment in the form of heat energy, resulting in serious waste of energy. In the current global trend of advocating energy conservation, emission reduction and green travel, it is extremely urgent to develop efficient energy recovery technologies. Once the energy lost by the suspension damper can be accurately converted into electrical energy, the cruising range of new energy vehicles is expected to achieve a qualitative leap. This can not only greatly alleviate users' concerns about insufficient cruising range, that is, the so-called "range anxiety", but also significantly enhance the comprehensive competitiveness of new energy vehicles in the market, inject strong impetus into the new energy vehicle industry to move towards a new stage of high-efficiency and sustainable development, and strongly promote its wide popularization and application globally.

[0003] CN 114810926B discloses a self-powered automotive suspension damper, which includes a main body of the suspension damper device. The main body of the suspension damper device includes a generator. The bottom of the generator is fixedly connected with a recovery device, and the top of one side of the recovery device is fixedly connected with a damping device. The damping device includes a sealing shell, and the inner wall of the sealing shell is movably connected with a movable plug. The bottom of the movable plug is provided with a resistance mechanism and a rack. The recovery device includes a fixed shell, and the inner wall of the fixed shell is fixedly connected with a transmission device. One side of the transmission device is provided with a transmission gear and a moving gear. The bottom of the movable plug is fixedly connected with one end of the rack. The outer wall of the rack is movably connected with a partition plate, and both ends of the partition plate are fixedly connected with the inner wall of the sealing shell. The bottom inner wall of the sealing shell is movably connected with a movable piston. The inner wall of one side of the movable piston is movably connected with a threaded rod. One side of the threaded rod is provided with a sliding rod. The inner wall of the movable piston is movably connected with the outer wall of the rack. The resistance mechanism includes a housing, and the inner wall of the housing is fixedly connected with an elastic sheet. One side of the elastic sheet is fixedly connected with a sealing gasket. The inner wall of the elastic sheet is fixedly connected with an elastic ring. One side of the inner wall of the fixed shell is rotatably connected with a telescopic piston. The inner wall of the fixed shell is movably connected with the outer wall of one end of the rack. One end of the telescopic piston is rotatably connected with one end of the rack. The outer wall of the other end of the telescopic piston is fixedly connected with an exhaust pipe, and the other end of the exhaust pipe is fixedly connected with one side of the transmission device. One side of the outer wall of the rack is movably connected with one side of the transmission gear. One end of the transmission gear is rotatably connected with the inner wall of the fixed shell. The outer wall of one side of the transmission gear is movably connected with the outer wall of the moving gear. One side of the moving gear is movably connected with a rotating gear, and one side of the rotating gear is fixedly connected with the rotating shaft of the generator. The moving gear includes a single gear. The transmission device includes a moving frame. One side of the moving frame is rotatably connected with one side of the single gear. The inner wall of the moving frame is movably connected with a gear one and a gear two. The outer wall of the gear one is movably connected with the outer wall of the gear two. The outer wall of the bottom of the moving frame is movably connected with a sealing box. The bottom of the moving frame is fixedly connected with a piston disc. The outer wall of the piston disc is movably connected with the inner wall of the sealing box. One end of the inner wall of the moving frame is movably connected with a moving rod. One end of the moving rod is movably connected with a runner. The other end of the moving rod is fixedly connected with an elastic frame. The inner wall of the sealing box is provided with a fixed groove.

[0004] CN 118391390 A discloses a hydraulic-electric energy harvesting shock absorber system for a discrete control type multi-chamber hydraulic cylinder, including a multi-chamber hydraulic cylinder actuator and an energy recovery system; the multi-chamber hydraulic cylinder actuator includes a multi-chamber hydraulic cylinder and a discrete control system, the multi-chamber hydraulic cylinder is a stepped cylinder body with continuously coaxial settings and gradually increasing cross-sectional areas of the cavities, the cavities of adjacent two-stage cylinder bodies are not connected, a piston is arranged in each stage of the cylinder body, each piston divides the inner cavity of the corresponding stage of the cylinder body into two chambers, the multi-chamber hydraulic cylinder has chambers, an oil inlet / outlet is arranged outside the end of each chamber, the adjacent two pistons are connected by a piston rod that passes through the corresponding adjacent two-stage cylinder bodies movably, the cross-sectional areas of the piston rods increase gradually in the same direction as the cross-sectional areas of the cylinder body cavities, and the effective oil area on any end face of the lower-stage piston is greater than the effective oil area on any end face of the upper-stage piston; the discrete control system includes a control valve group connected to each oil inlet / outlet, each control valve group is composed of 2 two-position two-way solenoid valves, the P ports of the two-position two-way solenoid valves in the same control valve group are connected in parallel and then connected to the oil inlet / outlet of the corresponding chamber; the A ports of one of the two-position two-way solenoid valves in different control valve groups are connected in parallel and then connected to the high-pressure pipeline, and the A ports of the other two-position two-way solenoid valves in different control valve groups are connected in parallel and then connected to the low-pressure pipeline; the energy recovery system includes a hydraulic motor, a generator coaxially arranged with the hydraulic motor, and a storage battery electrically connected to the generator, the oil inlet of the hydraulic motor is connected to the high-pressure pipeline through a high-pressure accumulator, and the oil outlet of the hydraulic motor is connected to the low-pressure pipeline through a low-pressure accumulator.

[0005] CN116044951A discloses an electromagnetic energy harvesting stepped magnetorheological damper. It includes a piston rod, a cylinder body, an upper end cover, a lower end cover and a piston head. The cylinder body is filled with magnetorheological fluid. The piston head includes an inner valve core, a first winding frame, a conductor ring and a first coil. The inner valve core includes a large-diameter end and a small-diameter end arranged in sequence. The large-diameter end and the small-diameter end make the inner valve core form a stepped shaft, and the large-diameter end is connected to the piston rod; the first winding frame is sleeved on the outer periphery of the inner valve core and forms a stepped damping channel between the first winding frame and the inner valve core. The upper end of the stepped damping channel is communicated with the rod chamber in the cylinder body, and the lower end of the stepped damping channel is communicated with the rodless chamber in the cylinder body through a connecting channel vertically arranged on the first winding; a radially outwardly penetrating mounting ring groove is arranged on the first winding frame, the first coil is wound around the inner wall surface of the mounting ring groove, and the conductor ring is embedded in the mounting ring groove and pressed on the outer surface of the first coil.

[0006] Limited by the suspension space and complex road condition excitations, when the motor works in the suspension system, the rotational speed generally remains at a low level. This makes it difficult for the motor to fit into its efficient working range, thereby resulting in low energy conversion efficiency. Summary of the Invention

[0007] Long-term practice has found that the following key technical problems exist in electromagnetic energy-harvesting suspensions:

[0008] 1. The vibration characteristics of the suspension do not match the efficient operating range of the motor. Due to limitations in suspension space and road condition excitation, the operating speed of the motor is generally low, resulting in insufficient energy conversion efficiency. If a speed-increasing device is used to increase the speed, not only will new frictional resistance be added, but also backlash impact will be introduced, deteriorating the vibration damping effect.

[0009] 2. There is a fundamental contradiction between vibration damping performance and power generation efficiency. Increasing the electromagnetic damping can improve the power generation efficiency, but it will significantly reduce the riding comfort. In addition, when the energy-harvesting actuator is directly placed between the sprung and unsprung masses, its own inertia will deteriorate the vibration damping performance.

[0010] In view of this, the present invention aims to propose an inertia-enhanced electromagnetic energy-harvesting suspension system, including: a first lead screw assembly, a flywheel, a permanent magnet synchronous motor, a second lead screw assembly, and a shock absorber housing. One end of the first lead screw assembly can be connected to the vehicle body through a first fixed connecting rod; the other end of the first lead screw assembly is fixedly connected to the flywheel, and the end of the first lead screw assembly connecting the flywheel is connected to one end of the shock absorber housing through a bearing; the flywheel can be placed in the cavity of the shock absorber housing;

[0011] The permanent magnet synchronous motor can be fixedly arranged in the shock absorber housing, and the power output shaft of the permanent magnet synchronous motor is connected to the second lead screw assembly, and the second lead screw assembly can be connected to the tire through a fixed seat.

[0012] In one embodiment, a bearing is provided between the power output shaft of the permanent magnet synchronous motor and the shock absorber housing.

[0013] In one embodiment, the first lead screw assembly includes a first lead screw nut and a first lead screw shaft. The first lead screw nut is detachably connected to the first fixed connecting rod; a movement space for the first lead screw shaft is provided inside the first fixed connecting rod; the first lead screw shaft can be coaxially and fixedly arranged with the first fixed connecting rod through the first lead screw nut.

[0014] In one embodiment, the second lead screw assembly includes a second lead screw nut and a second lead screw shaft. The second lead screw nut is detachably connected to the second fixed connecting rod; a movement space for the second lead screw shaft is provided inside the second fixed connecting rod; the second lead screw shaft can be coaxially and fixedly arranged with the second fixed connecting rod through the second lead screw nut.

[0015] In one embodiment, the shock absorber housing includes an upper end cover, a lower end cover, and a housing body. The upper end cover and the lower end cover are respectively detachably connected to the housing body.

[0016] In one embodiment, a main spring is sleeved outside the shock absorber housing. One end of the main spring is fixedly connected to a first fixed connecting rod through an upper spring seat; the other end of the main spring is fixedly connected to a second fixed connecting rod through a lower spring seat;

[0017] An elastic element is arranged between the first fixed connecting rod and the vehicle body.

[0018] In one embodiment, a secondary spring is arranged between the shock absorber housing and the lower spring seat.

[0019] In one embodiment, the inertia - capacitance enhanced electromagnetic energy - harvesting suspension system further includes an energy - harvesting circuit, a control module, and a battery; the permanent magnet synchronous motor is electrically connected to the energy - harvesting circuit and the control module respectively, and the energy - harvesting circuit and the control module are electrically connected to the battery respectively.

[0020] In one embodiment, the first lead screw assembly and the second lead screw assembly include ball screws.

[0021] The present invention also discloses a vehicle, which includes the inertia - capacitance enhanced electromagnetic energy - harvesting suspension system as described above.

[0022] An inertia - capacitance enhanced electromagnetic energy - harvesting suspension system disclosed by the present invention, by arranging a first lead screw assembly, a flywheel, a permanent magnet synchronous motor, a second lead screw assembly, and a shock absorber housing, combines the first lead screw assembly with the flywheel and connects them to the shock absorber housing through bearings; the flywheel can be placed in the cavity of the shock absorber housing, thus forming an inertia - capacitance tuning configuration, that is, an inertia container. The permanent magnet synchronous motor can be fixedly arranged in the shock absorber housing, and the power output shaft of the permanent magnet synchronous motor is connected to a second lead screw assembly to form an electromagnetic energy - harvesting structure, that is, an electromagnetic damper. And the secondary spring and the electromagnetic damper are installed in parallel and jointly connected in series with the inertia container to form a tuning unit. The vibration inside the inertia - capacitance tuning configuration is not synchronous with the main structure, and this asynchronous vibration amplifies the relative displacement inside the system, thereby significantly increasing the operating speed of the motor and realizing efficient power generation. Compared with the traditional electromagnetic energy - harvesting suspension, the inertia - capacitance enhanced electromagnetic energy - harvesting suspension system provided by the present invention can introduce the inertia - capacitance tuning configuration into the electromagnetic energy - harvesting suspension, significantly improving the energy conversion efficiency of the system, and at the same time solving the performance contradiction in the electromagnetic energy - harvesting suspension and realizing the effective decoupling of the shock - absorption performance and the power - generation efficiency.

[0023] Other features and advantages of the present invention will be described in detail in the subsequent detailed description part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0025] In the drawings:

[0026] Figure 1 Schematic diagram of an inertia - enhanced electromagnetic energy - harvesting suspension system according to an embodiment of the present invention;

[0027] Figure 2 Upper - part schematic diagram of an inertia - enhanced electromagnetic energy - harvesting suspension system according to an embodiment of the present invention;

[0028] Figure 3 Middle - part schematic diagram of an inertia - enhanced electromagnetic energy - harvesting suspension system according to an embodiment of the present invention;

[0029] Figure 4 Lower - part schematic diagram of an inertia - enhanced electromagnetic energy - harvesting suspension system according to an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the principle of a suspension system according to an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the circuit connection according to an embodiment of the present invention;

[0032] Figure 7 Minimum limits of the body acceleration a and the reciprocal x of the power generation of different energy - harvesting suspensions according to an embodiment of the present invention.

[0033] Explanation of reference numerals:

[0034] 1, body; 2, main spring; 3, tire; 4, fixed seat; 5, auxiliary spring; 6, permanent - magnet synchronous motor; 7, flywheel; 8, first fixed connecting rod; 9, first lead - screw assembly; 10, shock - absorber housing; 11, second lead - screw assembly; 12, second fixed connecting rod; 13, elastic element, 14, spring upper seat; 15, first lead - screw shaft; 16, first lead - screw nut; 17, upper end cover; 18, housing body; 19, lower end cover; 20, coupling; 21, second lead - screw shaft; 22, second lead - screw nut; 23, spring lower seat; 24, ground; 25, electromagnetic energy - harvesting damper; 26, inertor; 27, motor bracket. Detailed description of the specific implementation mode

[0035] The following will describe in detail the specific implementation mode of the present invention with reference to the accompanying drawings. It should be understood that the specific implementation mode described herein is only for the purpose of illustrating and explaining the present invention, and is not used to limit the present invention.

[0036] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first", "second", "third", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present invention described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] In order to solve the technical problems in the prior art that, limited by the suspension space and complex road condition excitations, when the motor works in the suspension system, the rotational speed generally remains at a low level. This makes it difficult for the motor to fit into its efficient working range, thereby resulting in low energy conversion efficiency and other technical problems. Since the suspension vibration characteristics do not match the efficient working range of the motor. Limited by the suspension space and road condition excitations, the working rotational speed of the motor is generally at a low level, resulting in poor energy conversion efficiency. If a speed increasing device is used to increase the rotational speed, not only will new frictional resistances be added, but also backlash impacts will be caused, thereby deteriorating the damping effect. There is a fundamental contradiction between the damping performance and the power generation efficiency. Although increasing the electromagnetic damping can improve the power generation efficiency, it will significantly reduce the riding comfort. In addition, when the energy harvesting actuator is directly arranged between the sprung and unsprung masses, its own inertia will have an adverse effect on the damping performance. The present invention provides an inertia capacitance enhanced electromagnetic energy harvesting suspension system, as Figure 1-7 shown in the schematic diagram of an inertia capacitance enhanced electromagnetic energy harvesting suspension system according to an embodiment of the present invention. The inertia capacitance enhanced electromagnetic energy harvesting suspension system includes a first lead screw assembly 9, a flywheel 7, a permanent magnet synchronous motor 6, a second lead screw assembly 11, and a shock absorber housing 10. One end of the first lead screw assembly 9 can be connected to the vehicle body 1 through a first fixed connecting rod 8; the other end of the first lead screw assembly 9 is fixedly connected to the flywheel 7, and the end of the first lead screw assembly 9 connecting the flywheel 7 is connected to one end of the shock absorber housing 10 through a bearing; the flywheel 7 can be placed in the cavity of the shock absorber housing 10;

[0039] The permanent magnet synchronous motor 6 can be fixedly arranged in the shock absorber housing 10. The power output shaft of the permanent magnet synchronous motor 6 is connected with the second lead screw assembly 11, and the second lead screw assembly 11 can be connected with the tire 3 through the fixed seat 4.

[0040] An inertia - capacitance enhanced electromagnetic energy - harvesting suspension system disclosed by the present invention, by arranging a first lead screw assembly, a flywheel, a permanent magnet synchronous motor, a second lead screw assembly, and a shock absorber housing, combines the first lead screw assembly with the flywheel and connects them to the shock absorber housing through bearings; the flywheel can be placed in the cavity of the shock absorber housing, thus forming an inertia - capacitance tuning configuration, namely an inertia - capacitance device. The permanent magnet synchronous motor can be fixedly arranged in the shock absorber housing, and the power output shaft of the permanent magnet synchronous motor is connected with the second lead screw assembly to form an electromagnetic energy - harvesting structure, namely an electromagnetic damper. And the auxiliary spring is installed in parallel with the electromagnetic damper, and together they are connected in series with the inertia - capacitance device to form a tuning unit. The vibration inside the inertia - capacitance tuning configuration is not synchronized with the main structure, and this asynchronous vibration amplifies the relative displacement inside the system, thereby significantly increasing the operating speed of the motor and achieving efficient power generation. Compared with the traditional electromagnetic energy - harvesting suspension, the inertia - capacitance enhanced electromagnetic energy - harvesting suspension system provided by the present invention can introduce the inertia - capacitance tuning configuration into the electromagnetic energy - harvesting suspension, significantly improving the energy conversion efficiency of the system, and at the same time solving the performance contradictions in the electromagnetic energy - harvesting suspension and achieving effective decoupling of the shock - absorption performance and the power - generation efficiency.

[0041] As Figure 5 shown in the schematic diagram, in the inertia - capacitance enhanced electromagnetic energy - harvesting suspension system disclosed by the present invention, the stiffness of the auxiliary spring 5 is k, the electromagnetic energy - harvesting damper 25 is composed of a permanent magnet synchronous motor and a second lead screw assembly, the electromagnetic damping coefficient in the electromagnetic energy - harvesting damper 25 is c, that is, after the auxiliary spring and the electromagnetic energy - harvesting damper are connected in parallel, they are then connected in series with the inertia - capacitance device 26 to form the core tuning unit, and the inertia - capacitance coefficient of the inertia - capacitance device 26 is b. The main spring provides the basic support stiffness. Among them, m s is the sprung mass, m u is the unsprung mass, Kt is the tire stiffness, and K is the main spring stiffness. When the tire 3 contacts the ground 24, it receives the road surface displacement q from the ground, which is converted into the tire displacement x u , and further converted into the displacement x b of the inertia - capacitance device 26, and finally to the displacement x s of the vehicle body. When the vehicle passes through an uneven road surface, the unsprung mass is excited to vibrate. At this time, the core tuning unit modulates the vibration energy through its dynamic characteristics and realizes efficient modulation of the vibration energy by using the inertia - capacitance tuning principle. The vibration inside the inertia - capacitance tuning configuration is not synchronized with the main structure, and this asynchronous vibration can amplify the relative displacement inside the system, thereby significantly increasing the operating speed of the motor and achieving efficient power generation.

[0042] In order to better fix the power output shaft of the permanent magnet synchronous motor 6 to the shock absorber housing 10, in a more preferred embodiment of the present invention, a bearing is provided between the power output shaft of the permanent magnet synchronous motor 6 and the shock absorber housing 10. At the same time, the permanent magnet synchronous motor 6 is fixedly connected to the inner cavity wall of the shock absorber housing 10 through a motor bracket 27. The connection between the power output shaft of the permanent magnet synchronous motor 6 and the shock absorber housing 10 is more stable and does not cause movement interference. In a more preferred case, at least one bearing is provided between the power output shaft of the permanent magnet synchronous motor 6 and the shock absorber housing 10. Preferably, 2 self-aligning bearings are provided to ensure the coaxiality requirement between the power output shaft and the shock absorber housing 10. The power output shaft of the permanent magnet synchronous motor 6 is coaxially connected to the second lead screw shaft 21 through a coupling 20, that is, the ends of the two shafts are connected to ensure that the center lines of the two shafts are on the same axis. When the vehicle passes through an uneven road surface, the unsprung mass is excited to generate vibration. The mechanical vibration is converted into rotational motion by the ball screw, and the permanent magnet synchronous motor converts mechanical energy into electrical energy, and the recovered electrical energy is stored in the battery through the energy harvesting circuit.

[0043] In order to better convert the vibration energy into the rotational kinetic energy of the flywheel 7, in a more preferred embodiment of the present invention, the first lead screw assembly 9 includes a first lead screw nut 16 and a first lead screw shaft 15, and the first lead screw nut 16 is detachably connected to the first fixed connecting rod 8; a movement space for the first lead screw shaft 15 is provided inside the first fixed connecting rod 8; the first lead screw shaft 15 can be fixedly arranged coaxially with the first fixed connecting rod 8 through the first lead screw nut 16. That is, when the suspension moves up and down to generate displacement, a relative displacement occurs between the first lead screw nut 16 and the first lead screw shaft 15, which means that the inerter 26 generates a displacement x b . This displacement is converted into the rotational kinetic energy of the flywheel 7 through the first lead screw assembly 9, and within a certain period of time afterwards, the rotational kinetic energy is converted into asynchronous vibration to achieve efficient modulation of the vibration energy and make the vibration inside the inerter tuning configuration out of sync with the main structure of the suspension. The asynchronous vibration amplifies the relative displacement inside the system, increases the operating speed of the motor, and realizes efficient power generation.

[0044] In order to better convert the vibration generated during vehicle driving into the rotational kinetic energy of the power output shaft of the permanent magnet synchronous motor 6, in a more preferred embodiment of the present invention, the second lead screw assembly 11 includes a second lead screw nut 22 and a second lead screw shaft 21, and the second lead screw nut 22 is detachably connected to the second fixed connecting rod 12; a movement space for the second lead screw shaft 21 is provided inside the second fixed connecting rod 12; the second lead screw shaft 21 can be fixedly arranged coaxially with the second fixed connecting rod 12 through the second lead screw nut 22.

[0045] In order to better assemble the shock absorber housing 10, the second lead screw assembly 11, the first lead screw assembly 9, and the permanent magnet synchronous motor 6, in a more preferred embodiment of the present invention, the shock absorber housing 10 includes an upper end cover 17, a lower end cover 19, and a housing body 18. The upper end cover 17 and the lower end cover 19 are respectively detachably connected to the housing body 18. In a more preferred case, the upper end cover 17 is connected to the housing body 18 by bolts, and the lower end cover 19 is connected to the housing body 18 by bolts.

[0046] In order to achieve a better shock absorption effect, in a more preferred embodiment of the present invention, a main spring 2 is sleeved outside the shock absorber housing 10. One end of the main spring 2 is fixedly connected to the first fixed connecting rod 8 through a spring upper seat 14; the other end of the main spring 2 is fixedly connected to the second fixed connecting rod 12 through a spring lower seat 23;

[0047] An elastic element 13 is provided between the first fixed connecting rod 8 and the vehicle body 1.

[0048] In order to make the auxiliary spring and the electromagnetic energy harvesting damper in parallel, in a more preferred embodiment of the present invention, an auxiliary spring 5 is provided between the shock absorber housing 10 and the spring lower seat 23.

[0049] In order to control the energy harvesting and damping coefficient through the permanent magnet synchronous motor 6, in a more preferred embodiment of the present invention, the inertia - enhanced electromagnetic energy harvesting suspension system further includes an energy harvesting circuit, a control module, and a battery; the permanent magnet synchronous motor 6 is electrically connected to the energy harvesting circuit and the control module respectively, and the energy harvesting circuit and the control module are electrically connected to the battery respectively. The permanent magnet synchronous motor 6 adopts a proportional control strategy based on speed feedback. The encoder real - time collects the motor speed signal, and the control module calculates the desired torque according to the speed, and adjusts the motor load characteristics through power electronic devices to achieve the closed - loop control of electromagnetic damping. This control strategy has the characteristics of simple structure and fast response, which is convenient for engineering implementation. For example, the minimum limits of the vehicle body acceleration a and the reciprocal of the generated power x, where the generated power is the integral of the power generation power, are as Figure 7 shown. The minimum vehicle body acceleration of the traditional energy harvesting suspension is 0.7141 m / s 2 . The inertia - enhanced electromagnetic energy harvesting suspension system improves the generated power by 10.3% under the condition of maintaining the same vehicle body acceleration.

[0050] The ball screw drive transmits power through the rolling of balls between the screw and the nut. The rolling friction coefficient is much smaller than the sliding friction coefficient. Therefore, the transmission efficiency can be as high as over 90%. Compared with the traditional sliding screw drive, it can effectively reduce energy loss and improve energy utilization rate. In a more preferred embodiment of the present invention, the first screw rod assembly 9 and the second screw rod assembly 11 include ball screws. The ball screw drive realizes efficient forward and reverse transmission, that is, it can convert rotational motion into linear motion and also convert linear motion into rotational motion.

[0051] The present invention also discloses a vehicle, which includes the inertia enhancement type electromagnetic energy harvesting suspension system as described above.

[0052] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0053] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0054] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0055] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An inertia capacity enhancement type electromagnetic energy feeding suspension system, characterized in that: The inertia-capacity-enhanced electromagnetic energy-feeding suspension system comprises a first screw assembly (9), a flywheel (7), a permanent magnet synchronous motor (6), a second screw assembly (11), and a shock absorber housing (10); one end of the first screw assembly (9) can be connected to the vehicle body (1) via a first fixed connecting rod (8); the other end of the first screw assembly (9) is fixedly connected to the flywheel (7); one end of the first screw assembly (9) connected to the flywheel (7) is connected to one end of the shock absorber housing (10) via a bearing; the flywheel (7) can be placed in the cavity of the shock absorber housing (10); The permanent magnet synchronous motor (6) can be fixedly arranged in the shock absorber housing (10), the power output shaft of the permanent magnet synchronous motor (6) is connected to the second screw assembly (11), and the second screw assembly (11) can be connected to the tire (3) through a fixing seat (4).

2. The inertia capacity enhancement type electromagnetic energy feeding suspension system according to claim 1 is characterized in that: A bearing is provided between the power output shaft of the permanent magnet synchronous motor (6) and the shock absorber housing (10).

3. The inertia capacity enhancement type electromagnetic energy feeding suspension system according to claim 1 is characterized in that: The first screw assembly (9) comprises a first screw nut (16) and a first screw shaft (15); the first screw nut (16) is detachably connected to the first fixed connecting rod (8); a movement space for the first screw shaft (15) is provided inside the first fixed connecting rod (8); the first screw shaft (15) can be fixedly arranged coaxially with the first fixed connecting rod (8) through the first screw nut (16).

4. The inertia capacity enhancement type electromagnetic energy feeding suspension system according to claim 1 is characterized in that: The second screw assembly (11) comprises a second screw nut (22) and a second screw shaft (21); the second screw nut (22) is detachably connected to the second fixed connecting rod (12); a movement space for the second screw shaft (21) is provided inside the second fixed connecting rod (12); the second screw shaft (21) can be fixedly arranged coaxially with the second fixed connecting rod (12) via the second screw nut (22).

5. The inertia capacity enhancement type electromagnetic energy feeding suspension system according to claim 1, characterized in that: The shock absorber housing (10) comprises an upper end cover (17), a lower end cover (19) and a shell body (18); the upper end cover (17) and the lower end cover (19) are respectively detachably connected to the shell body (18).

6. The inertia capacity enhancement type electromagnetic energy feeding suspension system according to claim 5 is characterized in that: A main spring (2) is sleeved on the outer side of the shock absorber housing (10); one end of the main spring (2) is fixedly connected to a first fixed connecting rod (8) via a spring upper seat (14); and the other end of the main spring (2) is fixedly connected to a second fixed connecting rod (12) via a spring lower seat (23); An elastic element (13) is provided between the first fixed connecting rod (8) and the vehicle body (1).

7. The inertia capacity enhancement type electromagnetic energy feeding suspension system according to claim 6 is characterized in that: An auxiliary spring (5) is arranged between the shock absorber housing (10) and the spring lower seat (23).

8. The inertia capacity enhancement type electromagnetic energy feeding suspension system according to any one of claims 1 to 7, characterized in that: The inertia capacity enhancement type electromagnetic energy feeding suspension system also includes an energy feeding circuit, a control module and a battery; the permanent magnet synchronous motor (6) is electrically connected to the energy feeding circuit and the control module respectively, and the energy feeding circuit and the control module are electrically connected to the battery respectively.

9. The inertia capacity enhancement electromagnetic energy feeding suspension system according to any one of claims 1 to 7, characterized in that: The first screw assembly (9) and the second screw assembly (11) comprise ball screws.

10. A vehicle, characterized in that: The vehicle includes an inertia-enhanced electromagnetic energy-feeding suspension system as described in any one of claims 1 to 9.

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