Suspension vibration piezoelectric energy recovery system

Abstract

The application discloses a kind of suspension vibration piezoelectric energy recovery systems, including mounting frame, piezoelectric power generation module, pressure supply telescopic mechanism, piezoelectric processing module, energy storage module and controller.Installation frame is respectively clamped and fixed in the outer side of frame connecting arm and wheel connecting arm;The side of one installation frame is fixed with several piezoelectric power generation modules, and the pressure end of piezoelectric power generation module is fixed with pressure supply telescopic mechanism between another installation frame;Piezoelectric power generation module is electrically connected with the input end of piezoelectric processing module, and the output end of piezoelectric processing module is electrically connected with the charging end of energy storage module;The control end of energy storage module is connected with controller signal, and the power supply end of energy storage module is electrically connected with the low-voltage load of automobile;The input end of controller is connected with the signal of automobile central control system.The application does not need to change original vehicle suspension structure, can convert suspension vibration energy into electric energy and power supply for low-voltage equipment in vehicle, so as to effectively improve the endurance of new energy vehicle.

Description

Technical Field

[0001] This invention relates to the field of energy recovery technology for new energy vehicles, specifically a suspension vibration piezoelectric energy recovery system. Background Technology

[0002] With the rapid development of new energy vehicles, vehicle energy-saving technology has become an important research direction in the automotive industry. Currently, new energy vehicles mainly rely on power batteries to power the drive system and all vehicle electrical systems, and driving range remains a key factor affecting user experience and car purchase decisions. How to extend the driving range as much as possible with limited battery capacity is a technical challenge that major automakers are continuously working on.

[0003] During vehicle operation, the suspension system experiences continuous vibrations due to uneven road surfaces. Traditional shock absorbers convert this vibrational energy into heat through hydraulic damping, which is then dissipated into the air via heat exchange, resulting in considerable energy waste. According to relevant research, ordinary vehicles lose 50-80 kWh of energy annually due to suspension vibrations. If this energy could be effectively recovered and utilized, for example, to power the vehicle's low-voltage electrical systems, the auxiliary load on the battery could be reduced, thereby indirectly improving the vehicle's range.

[0004] Piezoelectric materials, especially lead zirconate titanate (PZT) piezoelectric ceramics, possess the "piezoelectric effect" characteristic, generating voltage output when subjected to mechanical pressure. They offer advantages such as high output voltage, fast response speed, and small size, making them ideal for micro-energy harvesting systems. Therefore, integrating piezoelectric materials into automotive suspension systems to recover electrical energy using the dynamic pressure generated by suspension vibrations is a highly promising technological approach. Consequently, inventing a device capable of effectively recovering and utilizing the kinetic energy generated by automotive suspension systems is particularly necessary. Summary of the Invention

[0005] The purpose of this invention is to provide a suspension vibration piezoelectric energy recovery system, which converts suspension vibration energy into electrical energy and supplies power to low-voltage equipment in the vehicle, thereby effectively improving the range of new energy vehicles.

[0006] To achieve the above objectives, the present invention provides the following technical solution: comprising a mounting frame, a piezoelectric power generation module, a pressure supply telescopic mechanism, a piezoelectric processing module, an energy storage module, and a controller. Two mounting frames are provided, one fixed to the outer side of the inner frame connecting arm of the suspension, and the other fixed to the outer side of the inner wheel connecting arm of the suspension. Several piezoelectric power generation modules are bolted to the side of one mounting frame. A pressure supply telescopic mechanism is fixed between the pressure-receiving end of each piezoelectric power generation module and the other mounting frame. The ultimate compression distance of the pressure supply telescopic mechanism is the same as the ultimate compression distance of the shock absorber within the suspension. During extreme compression, the pressure on the piezoelectric power generation module remains within its safe pressure range. Each piezoelectric power generation module is electrically connected to the input terminal of the piezoelectric processing module via a power line, and the output terminal of the piezoelectric processing module is electrically connected to the charging terminal of the energy storage module via a power line. The control terminal of the energy storage module is connected to the controller signal via a data line, and the power supply terminal of the energy storage module is electrically connected to the low-voltage load of the vehicle via a power line. The input terminal of the controller is connected to the vehicle's central control system signal via a data line. The piezoelectric processing module, energy storage module, and controller are respectively fixed to the corresponding positions on the vehicle frame with bolts.

[0007] Furthermore, the mounting bracket includes an arc-shaped plate, a mounting ring, and ear plates. Two arc-shaped plates are provided, with one end hinged and rotatably connected, and the other end fixed together by bolts. The cylindrical body formed by the two arc-shaped plates clamps and fixes to the outer side of the corresponding suspension inner frame connecting arm or suspension inner wheel connecting arm. The mounting ring is fixed to the side of the arc-shaped plate near the suspension inner shock absorber by bolts. The inner diameter of the mounting ring is smaller than the diameter of the corresponding suspension inner frame connecting arm or suspension inner wheel connecting arm, but larger than the maximum outer diameter of the suspension inner shock absorber. The side of the mounting ring is fitted against the end face of the corresponding suspension inner frame connecting arm or suspension inner wheel connecting arm. Several ear plates are welded to the outer side of the mounting ring. A piezoelectric generator module or a pressure-supplying telescopic mechanism is fixed to the corresponding side of the ear plates by bolts. This arrangement facilitates the installation or removal of the mounting bracket from the corresponding suspension inner frame connecting arm or suspension inner wheel connecting arm, thus eliminating the need to modify the existing vehicle suspension.

[0008] Furthermore, the piezoelectric power generation module includes a sealing shell, a piezoelectric sheet, a pressure plate, a sliding column, and an auxiliary plate. The sealing shell is fixed to the side of the corresponding mounting bracket by bolts, and a piezoelectric sheet is movably arranged inside the sealing shell. The piezoelectric sheet is electrically connected to the charging port of the piezoelectric processing module via a power line, wherein one end of the piezoelectric sheet is the negative electrode and the other end is the positive electrode. A pressure plate is attached to one side of the piezoelectric sheet, wherein the pressure plate is slidably installed inside the sealing shell, and a sliding column is fixed by welding to the side of the pressure plate away from the piezoelectric sheet. The sliding column slides through the corresponding end of the sealing shell. An auxiliary plate is fixed by welding to the end of the sliding column away from the pressure plate, wherein the other side of the auxiliary plate is fixed to the corresponding mounting bracket by a pressure-supplying telescopic mechanism. With this arrangement, when the shock absorber in the suspension is compressed and reciprocates, alternating current can be generated according to the piezoelectric effect, and the alternating current can be transmitted to the piezoelectric processing module.

[0009] Furthermore, a first elastic gasket is provided between the corresponding end of the piezoelectric sheet and the inner wall of the sealing shell, and a second elastic gasket is provided between the other corresponding end of the piezoelectric sheet and the pressure plate. The first elastic gasket is fixed to the inner wall of the sealing shell, and the second elastic gasket is fixed to the corresponding side of the pressure plate. This arrangement, through the cooperation of the first elastic gasket and the second elastic gasket, can improve the uniformity of pressure on the piezoelectric sheet.

[0010] Furthermore, the pressure-supplying telescopic mechanism includes an outer tube, an inner tube, and a compression spring. One end of the outer tube is fixed to a corresponding mounting bracket, and the end of the inner tube is slidably installed inside the outer tube. The other end of the inner tube is fixed to the pressure-receiving end of the piezoelectric power generation module by bolts. A compression spring is fixed between the outer tube and the piezoelectric power generation module. The ultimate contraction length of the inner tube on the outer tube is the same as the ultimate contraction length of the shock absorber in the suspension. This arrangement provides corresponding pressure to the pressure-receiving end of the piezoelectric power generation module when the shock absorber in the suspension is compressed and released.

[0011] Furthermore, the outer tube includes a tube body, a first nut, a second nut, and a top plate. One end of the tube body is fixed to the corresponding mounting bracket by bolts, and the corresponding end of the inner tube is slidably installed inside the tube body. The first nut, the second nut, and the top plate are threadedly engaged on the outer surface of the tube body near the piezoelectric power generation module. One side of the top plate is fixed to the first nut by welding, and the other side is fixed to the pressure-bearing end of the piezoelectric power generation module by a compression spring. This arrangement allows for adjustment of the initial pressure of the compression spring on the piezoelectric power generation module.

[0012] Furthermore, the piezoelectric processing module integrates a rectifier circuit and a voltage regulator circuit. The input terminal of the rectifier circuit is electrically connected to the power supply terminal of the piezoelectric power generation module via a power line, and the output terminal of the rectifier circuit is electrically connected to the input terminal of the voltage regulator circuit via a power line. The output terminal of the voltage regulator circuit is electrically connected to the charging terminal of the energy storage module via a power line. This configuration allows for the sequential rectification and current stabilization of the AC power generated by the piezoelectric power generation module.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, when the vehicle is in motion, the shock absorbers in the suspension continuously compress and rebound. Because the limit compression distance of the pressure supply telescopic mechanism is exactly the same as that of the shock absorber, it can completely follow the movement of the suspension, synchronously and uniformly transmitting the pressure changes generated by the vibration to the piezoelectric power generation module. Under the action of continuously changing pressure, the piezoelectric sheet in this module generates alternating current using the "piezoelectric effect". After the electrical energy is rectified and stabilized by the piezoelectric processing module, it is stably stored in the energy storage module, ultimately supplying power to the low-voltage equipment in the vehicle. This reduces the energy consumption of the generator on the engine or power battery, effectively improving the range of new energy vehicles.

[0014] The mounting bracket of this invention adopts a split structure with two arc-shaped plates hinged at one end and bolted at the other. During installation, the two arc-shaped plates can be directly clamped together and fastened to the suspension frame connecting arm or wheel connecting arm without welding or any modification to the original vehicle structure. At the same time, the mounting ring is snapped onto the end face of the connecting arm, and in conjunction with the pressure-supply telescopic mechanism, axial positioning is achieved, which not only ensures the firmness of the installation, but also facilitates later disassembly and maintenance, significantly reducing the cost of vehicle installation and the technical threshold. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the mounting bracket of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the piezoelectric power generation module of the present invention.

[0018] Figure 4 This is a schematic diagram of the pressure supply telescopic mechanism of the present invention.

[0019] Figure 5 This is the present invention. Figure 4 A magnified view of the structure at position "A" in the middle. In the picture: 1-Mounting bracket, 11-Arc plate, 12-Mounting ring, 13-Ear plate, 2-Piezoelectric power generation module, 21-Sealing shell, 22-Piezoelectric sheet, 23-Pressure plate, 24-Sliding column, 25-Auxiliary plate, 26-First elastic gasket, 27-Second elastic gasket, 3-Pressure supply telescopic mechanism, 31-Outer tube, 311-Tube body, 312-First nut, 313-Second nut, 314-Top plate, 32-Inner tube, 33-Compression spring, 4-Piezoelectric processing module, 5-Energy storage module, 6-Controller, 7-Frame connecting arm, 8-Wheel connecting arm, 9-Shock absorber. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] As attached Figure 1-5 As shown: This invention provides a suspension vibration piezoelectric energy recovery system, comprising a mounting frame 1, piezoelectric power generation modules 2, a pressure supply telescopic mechanism 3, a piezoelectric processing module 4, an energy storage module 5, and a controller 6. Two mounting frames 1 are provided; one mounting frame 1 is clamped and fixed to the outer side of the inner frame connecting arm 7 of the suspension, and the other mounting frame 1 is fixed to the outer side of the inner wheel connecting arm 8 of the suspension in the same manner. On the side of one of the mounting frames 1, a plurality of piezoelectric power generation modules 2 are evenly fixed with stainless steel bolts. Each piezoelectric power generation module 2 has a pressure supply telescopic mechanism 3 fixed between its pressure-receiving end and the other mounting frame 1. The ultimate compression distance of the pressure supply telescopic mechanism 3 is set to be exactly the same as the ultimate compression distance of the inner shock absorber 9 of the suspension. Under ultimate compression, the peak pressure exerted by the pressure supply telescopic mechanism 3 on the piezoelectric power generation module 2 is 10 MPa. Within the safe pressure range of 5~15MPa of the piezoelectric power generation module 2, the long-term reliable operation of the module is ensured. The output of each piezoelectric power generation module 2 is electrically connected to the input of the piezoelectric processing module 4 via a shielded power cable, and the output of the piezoelectric processing module 4 is electrically connected to the charging end of the energy storage module 5 via a power cable. The energy storage module 5 uses a supercapacitor array, and its control end is connected to the controller 6 via a CAN data line, while its power supply end is electrically connected to the vehicle's 12V low-voltage load bus via a power cable. The input of the controller 6 is connected to the vehicle's central control system via another CAN data line to obtain the vehicle's driving status. The three modules, piezoelectric processing module 4, energy storage module 5, and controller 6, are respectively fixed to different corresponding positions on the vehicle frame with bolts, such as the firewall or trunk partition, for heat dissipation and wiring.

[0022] Specifically, the mounting bracket 1 includes an arc-shaped plate 11, a mounting ring 12, and an ear plate 13. Two arc-shaped plates 11 are provided, with one end of each plate hinged and rotatably connected via a stainless steel pin, and the other end fixed together by an M10 stainless steel bolt. When the bolt is tightened, the cylinder formed by the two arc-shaped plates 11 tightly clamps and fixes to the outer side of the corresponding suspension inner frame connecting arm 7 or suspension inner wheel connecting arm 8. On the side of each arc-shaped plate 11 near the suspension inner shock absorber 9, a mounting ring 12 is fixed by bolts. This mounting ring 12 is made of 40Cr steel and blackened. The inner diameter of the mounting ring 12 is designed to be 5mm smaller than the diameter of the corresponding connecting arm 7 or 8, and 20mm larger than the maximum outer diameter of the suspension inner shock absorber 9. The side of the mounting ring 12 is connected to the corresponding suspension inner frame connecting arm 7 or suspension inner wheel connecting arm 8. The end face of the wheel connecting arm 8 is fitted together; several ear plates 13 are fixed to the outer side of each mounting ring 12 by welding. The corresponding side of the ear plate 13 is fixed to the end of the piezoelectric power generation module 2 or the pressure supply telescopic mechanism 3 by bolts. With this arrangement, in use, by loosening or tightening the bolts between the two arc plates 11, the mounting bracket 1 can be easily installed or removed on the corresponding connecting arm 7 or 8 without welding by utilizing the hinge relationship between the two arc plates 11. At the same time, the fit between the mounting ring 12 and the end face of the inner frame connecting arm 7 or inner wheel connecting arm 8 of the suspension restricts the arc plate 11 from sliding away from the shock absorber 9, while the spring preload inside the pressure supply telescopic mechanism 3 can hold the arc plate 11 against it and prevent it from sliding closer to the shock absorber 9, thus achieving dual axial positioning.

[0023] Specifically, the piezoelectric power generation module 2 includes a sealing shell 21, a piezoelectric sheet 22, a pressure plate 23, a sliding column 24, and an auxiliary plate 25. The sealing shell 21 is made of 316L stainless steel and is fixed to the corresponding ear plate 13 by bolts. It forms a rectangular cavity inside, and the piezoelectric sheet 22 is movably arranged in the cavity. The piezoelectric sheet 22 is made of multilayer lead zirconate titanate (PZT) piezoelectric ceramics and can withstand vibration pressure of 5~15MPa. The instantaneous voltage output of a single piezoelectric unit is 80~150V. One end of the piezoelectric sheet 22 is the negative electrode and the other end is the positive electrode. It is electrically connected to the input terminal of the piezoelectric processing module 4 through a high-temperature shielded power supply line. The pressure plate 23 is tightly attached to one side of the piezoelectric sheet 22. The pressure plate 23 is made of tool steel and polished smooth. It can slide freely inside the sealed shell 21; a sliding column 24 is fixed by welding on the side of the pressure plate 23 away from the piezoelectric element 22, and the sliding column 24 slides through the linear bearing on the end cover of the sealed shell 21; an auxiliary plate 25 is fixed by welding on the far end of the sliding column 24, and the other side of the auxiliary plate 25 is rigidly fixed to the movable end of the pressure supply telescopic mechanism 3 by bolts. With this setting, when the suspension vibrates, the reciprocating force generated by the pressure supply telescopic mechanism 3 directly acts on the auxiliary plate 25, and the alternating pressure is evenly transmitted to the piezoelectric element 22 through the sliding column 24 and the pressure plate 23. Under the changing pressure (fluctuating in the range of 5~10MPa), the piezoelectric element 22 generates alternating current based on the positive piezoelectric effect, and outputs it to the subsequent piezoelectric processing module 4 through the power line.

[0024] Specifically, a first elastic gasket 26 is provided between the corresponding end of the piezoelectric sheet 22 and the inner wall of the sealing shell 21, and a second elastic gasket 27 is provided between the other corresponding end of the piezoelectric sheet 22 and the pressure plate 23. The first elastic gasket 26 is fixed to the inner wall of the sealing shell 21, and the second elastic gasket 27 is fixed to the corresponding side of the pressure plate 23. Both the first elastic gasket 26 and the second elastic gasket 27 are made of 1mm thick polyurethane rubber. This arrangement, through the cooperation of the first elastic gasket 26 and the second elastic gasket 27, can improve the pressure uniformity of the piezoelectric sheet 22.

[0025] Specifically, the pressure-supplying telescopic mechanism 3 includes an outer tube 31, an inner tube 32, and a compression spring 33. One end of the outer tube 31 is fixed to the corresponding mounting bracket 1, and the end of the inner tube 32 is slidably installed inside the outer tube 31. The other end of the inner tube 32 is fixed to the pressure-receiving end of the piezoelectric power generation module 2 by bolts. A compression spring 33 is fixed between the outer tube 31 and the piezoelectric power generation module 2. The compression spring 33 is made of 60Si2Mn spring steel, and its elastic coefficient is calculated to ensure that the pressure supplied to the piezoelectric element 22 changes linearly within the range of 5~10MPa during the compression stroke. The limit contraction length of the inner tube 32 on the outer tube 31 is the same as the limit contraction length of the shock absorber 9 in the suspension. With this setting, when the shock absorber 9 in the suspension is compressed and released, the inner tube 32 will slide accordingly in the outer tube 31. As the inner tube 32 contracts in the outer tube 31, the pressure of the compression spring 33 on the pressure-receiving end of the piezoelectric power generation module 2 will change synchronously.

[0026] Specifically, the outer tube 31 includes a tube body 311, a first nut 312, a second nut 313, and a top plate 314. One end of the tube body 311 is fixed to the corresponding mounting bracket 1 by bolts, and the corresponding end of the inner tube 32 is slidably installed inside the tube body 311. The outer side of the tube body 311 near the piezoelectric power generation module 2 is threadedly fitted with the first nut 312, the second nut 313, and the top plate 314. One side of the top plate 314 is fixed to the first nut 312 by welding, and the other side is fixed to the pressure end of the piezoelectric power generation module 2 by a compression spring 33. With this arrangement, the initial pressure of the compression spring 33 on the piezoelectric power generation module 2 can be adjusted by the position of the first nut 312 and the second nut 313 on the tube body 311. When the first nut 312 and the second nut 313 are squeezed against each other, a "double nut anti-loosening" effect can be produced.

[0027] Specifically, the internal circuit board of the piezoelectric processing module 4 integrates a bridge rectifier circuit and a DC-DC voltage regulator circuit. The input of the rectifier circuit receives 80~150V AC power from the piezoelectric power generation module 2 and converts it into DC power with smaller pulsations. Subsequently, this DC power enters the voltage regulator circuit, which adopts a high-efficiency step-down topology to stably convert the fluctuating voltage of the front-end into a 12V low-voltage DC output to the energy storage module 5. The energy conversion efficiency of the entire module can reach 60%~70% at the common vibration frequency of 5~10Hz. The energy storage module 5 consists of several supercapacitor arrays (3000F / 2.7V per capacitor), which can quickly store and release electrical energy. The controller 6 monitors the terminal voltage of the supercapacitor array in real time. When it is higher than 14V, it opens the discharge channel to supply power to the 12V car battery or low-voltage load. When the voltage is lower than 10V, it shuts down the output to protect the energy storage module.

[0028] The usage method of this embodiment includes the following steps: When the car is moving, the vibration caused by uneven road surface causes relative movement between the frame connecting arm 7 and the wheel connecting arm 8 in the suspension. The shock absorber 9 in the suspension is constantly compressed and rebounded. Since the limit compression distance of the pressure supply telescopic mechanism 3 is exactly the same as that of the shock absorber 9, and both ends are fixed on the two connecting arms respectively, it can follow the suspension movement completely synchronously. The pressure supply telescopic mechanism 3 converts the vibration displacement of the suspension into dynamic mechanical pressure, and acts continuously and at the same amplitude on the pressure-receiving end of the piezoelectric power generation module 2.

[0029] Under continuously changing pressure, the piezoelectric power generation module 2 generates alternating current based on the "piezoelectric effect" through its internal piezoelectric material. This electrical energy is collected by the power line to the piezoelectric processing module 4. The piezoelectric processing module 4 first converts the alternating current into direct current through the internal rectifier circuit, and then converts it into stable low-voltage direct current suitable for storage through the voltage regulator circuit. Finally, it is output to the energy storage module 5 for storage.

[0030] The controller 6 monitors the energy status of the energy storage module 5 in real time, and releases the stored electrical energy in a timely manner according to the instructions sent by the vehicle's central control system to supply the low-voltage load of the vehicle, thereby realizing the process of recovering and utilizing the suspension vibration energy.

[0031] All components used in this application are standard parts, and the specific connection methods of each part adopt conventional methods such as sewing and gluing that are mature in the prior art. All structures use conventional materials in the prior art, and will not be described in detail here.

[0032] In summary, this suspension vibration piezoelectric energy recovery system can convert suspension vibration energy into electrical energy and power low-voltage equipment in the vehicle, thereby effectively improving the range of new energy vehicles.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A suspension vibration piezoelectric energy recovery system, comprising a mounting frame (1), a piezoelectric power generation module (2), a pressure supply telescopic mechanism (3), a piezoelectric processing module (4), an energy storage module (5), and a controller (6), characterized in that: Two mounting brackets (1) are provided. One mounting bracket (1) is fixed to the outer side of the inner frame connecting arm (7) of the suspension, and the other mounting bracket (1) is fixed to the outer side of the inner wheel connecting arm (8) of the suspension. Several piezoelectric power generation modules (2) are fixed to the side of one of the mounting brackets (1). A pressure supply telescopic mechanism (3) is fixed between the pressure-receiving end of the piezoelectric power generation module (2) and the other mounting bracket (1). The ultimate compression distance of the pressure supply telescopic mechanism (3) is the same as the ultimate compression distance of the inner shock absorber (9) of the suspension. When the pressure supply telescopic mechanism (3) is under ultimate compression, the pressure on the piezoelectric power generation module (2) is at the piezoelectric power generation module (2). 2) Within the safe pressure zone; the piezoelectric power generation module (2) is electrically connected to the input end of the piezoelectric processing module (4) via a power line, wherein the output end of the piezoelectric processing module (4) is electrically connected to the charging end of the energy storage module (5) via a power line; the control end of the energy storage module (5) is connected to the controller (6) via a data line, and the power supply end of the energy storage module (5) is electrically connected to the low-voltage load of the vehicle via a power line; the input end of the controller (6) is connected to the central control system of the vehicle via a data line; the piezoelectric processing module (4), the energy storage module (5) and the controller (6) are respectively fixed at the corresponding positions on the vehicle frame.

2. The suspension vibration piezoelectric energy recovery system as described in claim 1, characterized in that: The mounting bracket (1) includes an arc-shaped plate (11), a mounting ring (12), and an ear plate (13). There are two arc-shaped plates (11). One end of the two arc-shaped plates (11) is connected by a hinge, and the other end is fixed together by bolts. The cylinder formed by the two arc-shaped plates (11) is clamped and fixed to the outer side of the corresponding suspension inner frame connecting arm (7) or suspension inner wheel connecting arm (8). The mounting ring (12) is fixed to the side of the arc-shaped plate (11) near the inner shock absorber (9) of the suspension by bolts. The inner diameter of the mounting ring (12) is smaller than the diameter of the corresponding suspension inner frame connecting arm (7) or suspension inner wheel connecting arm (8), and larger than the maximum outer diameter of the suspension inner shock absorber (9). The side of the mounting ring (12) is fitted to the end face of the corresponding suspension inner frame connecting arm (7) or suspension inner wheel connecting arm (8). The outer side of the mounting ring (12) is fixed with several ear plates (13), and the corresponding side of the ear plate (13) is fixed with a piezoelectric power generation module (2) or a pressure supply telescopic mechanism (3).

3. The suspension vibration piezoelectric energy recovery system as described in claim 2, characterized in that: The piezoelectric power generation module (2) includes a sealing shell (21), a piezoelectric sheet (22), a pressure plate (23), a sliding column (24), and an auxiliary plate (25). The sealing shell (21) is fixed to the side of the corresponding mounting bracket (1), and the piezoelectric sheet (22) is movably arranged inside the sealing shell (21). The piezoelectric sheet (22) is electrically connected to the charging port of the piezoelectric processing module (4) through a power line. One end of the piezoelectric sheet (22) is the negative electrode, and the other end is the positive electrode. 2) A pressure plate (23) is attached to one side of the sealing shell (21), wherein the pressure plate (23) is slidably installed inside the sealing shell (21), and a sliding column (24) is fixed on the side of the pressure plate (23) away from the piezoelectric sheet (22), the sliding column (24) slides through the corresponding end of the sealing shell (21); an auxiliary plate (25) is fixed on the end of the sliding column (24) away from the pressure plate (23), wherein the other side of the auxiliary plate (25) is fixed to the corresponding mounting bracket (1) through the pressure supply telescopic mechanism (3).

4. The suspension vibration piezoelectric energy recovery system as described in claim 3, characterized in that: A first elastic gasket (26) is provided between the corresponding end of the piezoelectric sheet (22) and the inner wall of the sealing shell (21), and a second elastic gasket (27) is provided between the other corresponding end of the piezoelectric sheet (22) and the pressure plate (23). The first elastic gasket (26) is fixed to the inner wall of the sealing shell (21), and the second elastic gasket (27) is fixed to the corresponding side of the pressure plate (23).

5. A suspension vibration piezoelectric energy recovery system as described in claim 1, characterized in that: The pressure supply telescopic mechanism (3) includes an outer tube (31), an inner tube (32), and a compression spring (33). One end of the outer tube (31) is fixed on the corresponding mounting bracket (1), and the end of the inner tube (32) is slidably installed inside the outer tube (31). The other end of the inner tube (32) is fixed to the pressure end of the piezoelectric power generation module (2). A compression spring (33) is fixed between the outer tube (31) and the piezoelectric power generation module (2). The limit contraction length of the inner tube (32) on the outer tube (31) is the same as the limit contraction length of the shock absorber (9) in the suspension.

6. A suspension vibration piezoelectric energy recovery system as described in claim 5, characterized in that: The outer tube (31) includes a tube body (311), a first nut (312), a second nut (313), and a top plate (314). One end of the tube body (311) is fixed on the corresponding mounting bracket (1), and the corresponding end of the inner tube (32) is slidably installed inside the tube body (311). The outer side of the tube body (311) near the piezoelectric power generation module (2) is fitted with the first nut (312), the second nut (313), and the top plate (314) by thread engagement. One side of the top plate (314) is fixed to the first nut (312) by welding, and the other side is fixed to the pressure end of the piezoelectric power generation module (2) by compression spring (33).

7. A suspension vibration piezoelectric energy recovery system as described in claim 1, characterized in that: The piezoelectric processing module (4) integrates a rectifier circuit and a voltage regulator circuit. The input terminal of the rectifier circuit is electrically connected to the power supply terminal of the piezoelectric power generation module (2) through a power line, and the output terminal of the rectifier circuit is electrically connected to the input terminal of the voltage regulator circuit through a power line. The output terminal of the voltage regulator circuit is electrically connected to the charging terminal of the energy storage module (5) through a power line.

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