Electromagnetic friction combined type suspension energy recovery device

Abstract

The invention belongs to the technical field of friction power generation, and discloses an electromagnetic friction combined type suspension energy recovery device which comprises a friction nanometer generator set and an electromagnetic generator set, the friction nanometer generator set comprises a set shell, a sliding rack and a patch electrode, the sliding rack is connected into the set shell in a sliding mode, and the patch electrode is arranged in the set shell in an attached mode. Plastic sheets distributed at intervals are arranged on the side wall of the sliding rack, the patch electrode comprises a conductive part and a copper sheet, the copper sheet is connected to the conductive part, and the plastic sheets and the copper sheet perform friction power generation; a speed increasing gear train is arranged in the unit shell, an electromagnetic generator set is arranged on the outer wall of the unit shell, the speed increasing gear train is connected to the rack in a meshed mode, and a gear shaft of a terminal gear of the speed increasing gear train is connected with an input shaft of the electromagnetic generator set. According to the electromagnetic friction combined type suspension energy recovery device, energy of a suspension system can be collected and stored, so that the energy can be used by other electrical parts of an automobile, and the energy utilization efficiency of the suspension system is improved while energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of triboelectric power generation, and in particular to an electromagnetic friction composite suspension energy recovery device. Background Art

[0002] The main functions of a vehicle suspension system are to support the vehicle body weight, isolate the frame from road disturbances, and maintain wheel contact with the road surface. Two key components of the suspension system are the spring and the shock absorber. Traditional shock absorbers are designed to convert vibration energy into heat energy to attenuate vibrations. However, this consumed energy actually comes from fuel or electricity, resulting in a large amount of waste. With the rise of the concept of green manufacturing, especially in the automotive industry, reducing energy waste and improving energy efficiency have become key issues. The suspension system is an important component for vehicle energy transfer and consumption. Recycling the vibration energy of the suspension system and converting it into electrical energy for power supply is a feasible solution. Therefore, energy recovery suspensions have emerged. Such systems can not only convert and store energy but also improve the fuel efficiency of vehicles.

[0003] The triboelectric nanogenerator is a new type of generator that can collect energy from the surrounding environment in real time and convert the energy into electrical energy for storage or power supply. However, the general output power of the triboelectric nanogenerator is in the micro-watt or milli-watt level, which is not high for energy collection. For devices with high power consumption, it is difficult to support the operation of electrical appliances. Therefore, improving the output power is the top priority for the wider promotion of triboelectric nanogenerators.

[0004] Therefore, there is an urgent need to provide a new type of electromagnetic friction composite suspension energy recovery device to solve the above technical problems in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide an electromagnetic friction composite suspension energy recovery device that can collect the energy of the suspension system for storage, so as to be used by other electrical components of the vehicle, saving energy and the environment while improving the energy utilization efficiency of the suspension system.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The electromagnetic friction composite suspension energy recovery device includes a triboelectric nanogenerator and an electromagnetic generator. The triboelectric nanogenerator includes a generator housing, a sliding rack, and patch electrodes. The sliding rack extends along a first direction and is slidably connected inside the generator housing along the first direction. One end of the sliding rack along the first direction protrudes from the generator housing and can be connected to the suspension system. The patch electrodes are attached inside the generator housing along the first direction. The sliding rack is arranged opposite to the patch electrodes. Elastic plastic sheets are arranged at intervals along the first direction on the side wall of the end of the sliding rack close to the patch electrodes. The plastic sheets are arched toward the patch electrodes. The patch electrodes include a conductive part extending along the first direction and several copper sheets arranged at intervals along the first direction. The several copper sheets are all connected to the conductive part. The distance between adjacent two plastic sheets is equal to the distance between adjacent two copper sheets. Friction electricity is generated between the plastic sheets and the copper sheets. Both the conductive part and the sliding rack can be electrically connected to the energy storage device. A speed increasing gear train is arranged inside the generator housing, and the electromagnetic generator is arranged on the outer wall of the generator housing. The starting gear of the speed increasing gear train is meshed with the rack, and the axle of the terminal gear of the speed increasing gear train is connected to the input shaft of the electromagnetic generator. The electromagnetic generator can be electrically connected to the energy storage device.

[0008] Optionally, tooth structures are arranged at both ends of the sliding rack along a second direction. Two speed increasing gear trains are arranged corresponding to the electromagnetic generator one by one. The two ends of the sliding rack along the second direction are meshed with the two speed increasing gear trains one by one. The second direction is perpendicular to the first direction.

[0009] Optionally, the speed increasing gear train includes a first transmission gear, a second transmission gear, and a third transmission gear. The first transmission gear is meshed with the starting gear. The second transmission gear is meshed with the first transmission gear. The third transmission gear is coaxially fixed with the second transmission gear. The third transmission gear is meshed with the terminal gear. The diameter of the first transmission gear is smaller than that of the starting gear. The diameter of the second transmission gear is smaller than that of the first transmission gear. The diameter of the third transmission gear is larger than that of the second transmission gear. The diameter of the terminal gear is smaller than that of the third transmission gear.

[0010] Optionally, the terminal gear and the starting gear are coaxially arranged, and the terminal gear is rotatably connected to the starting gear.

[0011] Optionally, the speed increasing gear system further includes a first supporting gear and a second supporting gear coaxially arranged, the first supporting gear is rotatably connected to the second supporting gear, the first supporting gear is meshed with the starting gear, and the second supporting gear is meshed with the starting gear.

[0012] Optionally, the electromagnetic generator set includes a generator housing, a rotor group and a first stator group. The rotor group and the first stator group are coaxially arranged and both are arranged inside the generator housing. The rotor group is coaxially connected to the axle of the terminal gear. The first stator group is circumferentially provided with a plurality of first winding coils. The rotor group is circumferentially provided with a plurality of magnets, and the magnetic poles of any two adjacent magnets are opposite.

[0013] Optionally, the electromagnetic generator set further includes a second stator group arranged inside the generator housing, the second stator group being provided with a plurality of second winding coils along the circumferential direction, the second stator group being coaxially arranged with the first stator group, and the rotor group being arranged between the first stator group and the second stator group.

[0014] Optionally, the number, shape and size of the above-mentioned first winding coils, the above-mentioned magnets and the above-mentioned second winding coils are the same, and the diameters of the circles formed by the centers of several of the above-mentioned first winding coils, the circles formed by the centers of several of the above-mentioned second winding coils and the circles formed by the centers of several of the above-mentioned magnets are the same, and the above-mentioned first winding coils are coaxially arranged with the corresponding above-mentioned second winding coils.

[0015] Optionally, two conductive parts are provided, and two adjacent copper sheets are connected to different conductive parts.

[0016] Optionally, one of the side wall of the sliding rack away from the plastic sheet and the inner wall of the unit housing is provided with a slide rail extending along the first direction, and the other is provided with a slider slidably connected with the slide rail.

[0017] Beneficial effects:

[0018] The electromagnetic friction composite suspension energy recovery device in the present invention includes a triboelectric nanogenerator and an electromagnetic generator. On the one hand, the triboelectric nanogenerator includes a sliding rack and a patch electrode arranged inside the generator housing. The sliding rack is connected to the suspension system. As the suspension system operates, the sliding rack moves along the first direction inside the generator housing, so that the plastic sheet on the sliding rack and the copper sheet of the patch electrode rub against each other. The plastic sheet and the copper sheet are both arranged at equal intervals, thereby transmitting the electrical energy generated by triboelectric power generation to the energy storage device in a pulsed manner for storage. On the other hand, the electromagnetic generator can also be driven by the sliding rack and the speed increasing gear train. The speed increasing gear train amplifies the movement of the sliding rack, so that the electromagnetic generator can operate at high speed, thereby generating electrical energy with sufficient power, which is also transmitted and stored in the energy storage device for subsequent use. This electromagnetic friction composite suspension energy recovery device can collect the energy of the suspension system for storage, so as to be used by other electrical components of the vehicle, improving the energy utilization efficiency of the suspension system while saving energy and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric view of the electromagnetic friction composite suspension energy recovery device provided by the specific embodiment of the present invention;

[0020] Figure 2 is an axonometric view of the internal structure of the triboelectric nanogenerator provided by the specific embodiment of the present invention;

[0021] Figure 3 is Figure 2 a partial enlarged view of part A in

[0022] Figure 4 is an exploded view of the electromagnetic generator provided by the specific embodiment of the present invention.

[0023] In the figure:

[0024] 100, triboelectric nanogenerator; 110, generator housing; 111, slide rail; 120, sliding rack; 121, plastic sheet; 122, slider; 130, patch electrode; 131, copper sheet; 132, conductive part; 140, speed increasing gear train; 141, starting gear; 142, terminal gear; 143, first transmission gear; 144, second transmission gear; 145, third transmission gear; 146, first support gear; 147, second support gear; 200, electromagnetic generator; 210, generator outer shell; 220, rotor group; 221, magnet; 230, first stator group; 231, first winding coil; 240, second stator group; 241, second winding coil. SPECIFIC EMBODIMENTS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0026] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of 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.

[0027] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0028] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, 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. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] The first direction described in this embodiment is Figure 2 the X direction shown in Figure 2 i.e., the length direction of the sliding rack; the second direction is the Y direction shown in

[0030] such as Figures 1 to 3As shown, the electromagnetic friction composite suspension energy recovery device includes a triboelectric nanogenerator 100 and an electromagnetic generator 200. The triboelectric nanogenerator 100 includes a unit housing 110, a sliding rack 120, and a patch electrode 130. The sliding rack 120 extends along a first direction and is slidably connected inside the unit housing 110 along the first direction. One end of the sliding rack 120 along the first direction protrudes from the unit housing 110 and can be connected to the suspension system. The patch electrode 130 is attached to the inside of the unit housing 110 along the first direction. The sliding rack 120 is disposed opposite to the patch electrode 130. Plastic sheets 121 are arranged at intervals along the first direction on the side wall of the end of the sliding rack 120 close to the patch electrode 130. The plastic sheets 121 are elastic and arched towards the patch electrode 130. The patch electrode 130 includes a conductive part 132 extending along the first direction and a plurality of copper sheets 131 arranged at intervals along the first direction. The plurality of copper sheets 131 are all connected to the conductive part 132. The distance between adjacent two plastic sheets 121 is equal to the distance between adjacent two copper sheets 131. Friction electricity is generated between the plastic sheets 121 and the copper sheets 131. Both the conductive part 132 and the sliding rack 120 can be electrically connected to the energy storage device. A speed increasing gear train 140 is arranged inside the unit housing 110. An electromagnetic generator 200 is arranged on the outer wall of the unit housing 110. The starting gear 141 of the speed increasing gear train 140 is meshed with the rack. The axle of the terminal gear 142 of the speed increasing gear train 140 is connected to the input shaft of the electromagnetic generator 200. The electromagnetic generator 200 can be electrically connected to the energy storage device.

[0031] The electromagnetic friction composite suspension energy recovery device in this embodiment includes a triboelectric nanogenerator 100 and an electromagnetic generator 200. On the one hand, the triboelectric nanogenerator 100 includes a sliding rack 120 and a patch electrode 130 disposed inside the unit housing 110. The sliding rack 120 is connected to the suspension system. As the suspension system operates, the sliding rack 120 moves inside the unit housing 110 along a first direction, so that the plastic sheet 121 on the sliding rack 120 and the copper sheet 131 of the patch electrode 130 rub against each other. The plastic sheet 121 and the copper sheet 131 are both arranged at equal intervals, thereby transmitting the electric energy generated by triboelectric power generation to the energy storage device in a pulsed manner for storage. On the other hand, the electromagnetic generator 200 can also be driven by the sliding rack 120 and the speed increasing gear train 140. The speed increasing gear train 140 amplifies the movement of the sliding rack 120, so that the electromagnetic generator 200 can operate at a high speed, thereby generating electric energy with sufficient power, which is also transmitted and stored in the energy storage device for subsequent use. This electromagnetic friction composite suspension energy recovery device can collect the energy of the suspension system for storage, so as to be used by other electrical components of the vehicle, improving energy utilization efficiency of the suspension system while saving energy and protecting the environment.

[0032] In this embodiment, the plastic sheet 121 serves as the negative electrode and the copper sheet 131 serves as the positive electrode to generate triboelectric power. Specifically, the material of the plastic sheet 121 can be selected from two typical triboelectric negative electrode materials, polytetrafluoroethylene (PTFE) and polydimethylsiloxane (PDMS). Of course, it can also be selected from modified materials of polydimethylsiloxane, polyvinylidene fluoride (PVDF) and its derivatives, polyurethane (PU) foam, nanocellulose / polyacrylic acid (PAA) composite materials, etc., which will not be listed one by one here; the copper sheet 131 can not only be made of copper material, but also be replaced with other metal materials such as silver and aluminum, as well as metal compounds such as zinc oxide nanowires (ZnO) and barium titanate (BaTiO3) nanowires, and natural polymer-based composite materials such as cellulose (CNF) or chitosan (CTS) aerogel, polylactic acid (PLA)-based materials, etc., which will not be elaborated here.

[0033] Furthermore, tooth structures are provided at both ends of the sliding rack 120 along a second direction. Two speed increasing gear trains 140 are provided corresponding to the electromagnetic generator 200 one by one. The two ends of the sliding rack 120 along the second direction are engaged with the two speed increasing gear trains 140 one by one. Thus, the linear motion of the sliding rack 120 along the first direction is converted into rotational motion by the two speed increasing gear trains 140, and the speed is increased during the conversion process, enabling the two electromagnetic generators 200 to operate at a high speed for power generation simultaneously, improving the power generation efficiency and power.

[0034] In this embodiment, the above-mentioned speed increasing gear train 140 includes a first transmission gear 143, a second transmission gear 144, and a third transmission gear 145. The first transmission gear 143 meshes with the start-end gear 141. The second transmission gear 144 meshes with the first transmission gear 143. The third transmission gear 145 is coaxially fixed with the second transmission gear 144. The third transmission gear 145 meshes with the end gear 142. The diameter of the first transmission gear 143 is smaller than that of the start-end gear 141. The diameter of the second transmission gear 144 is smaller than that of the first transmission gear 143. The diameter of the third transmission gear 145 is larger than that of the second transmission gear 144. The diameter of the end gear 142 is smaller than that of the third transmission gear 145. Through the three-stage speed increase of the first transmission gear 143, the second transmission gear 144, and the third transmission gear 145, the rotation speed of the end gear 142 can be increased as much as possible. Moreover, since the third transmission gear 145 is coaxially fixed with the second transmission gear 144, the space occupied radially by the speed increasing gear train 140 is reduced, making the structure of the speed increasing gear train 140 more compact, reducing the volume of the electromagnetic friction composite suspension energy recovery device, and making it more convenient for installation.

[0035] Please continue to refer to Figure 2 , the end gear 142 and the start-end gear 141 are coaxially arranged, and the end gear 142 is rotatably connected to the start-end gear 141. In this embodiment, the coaxial arrangement of the end gear 142 and the start-end gear 141 can reduce the coverage area when multiple gears in the speed increasing gear train 140 mesh, reduce the space occupied by the speed increasing gear train 140, ensure the compactness of the internal structure of the unit housing 110, and thus further reduce the volume of the electromagnetic friction composite suspension energy recovery device, making it more convenient to install in the narrow space of the suspension system. At the same time, the end gear 142 is rotatably connected to the start-end gear 141, so that the two do not affect each other and ensure the reliable operation of the speed increasing gear train 140.

[0036] Furthermore, the above-mentioned speed increasing gear train 140 further includes a first support gear 146 and a second support gear 147 arranged coaxially. The first support gear 146 is rotatably connected to the second support gear 147. The first support gear 146 meshes with the start-end gear 141. The second support gear 147 meshes with the start-end gear 141. The arrangement of the first support gear 146 and the second support gear 147 can support the start-end gear 141 and the end gear 142 of the speed increasing gear train 140, reduce the vibration and fluctuation during the operation of the speed increasing gear train 140, and ensure the stable operation of the speed increasing gear train 140.

[0037] As an alternative embodiment, one side wall of the end of the sliding rack 120 facing away from the plastic sheet 121 and the inner wall of the unit housing 110 are provided with slide rails 111 extending in the first direction, and the other is provided with sliders 122 slidably connected in cooperation with the slide rails 111. In this embodiment, the sliding rack 120 is provided with two sliders 122, and the inner wall of the unit housing 110 is provided with slide rails 111, so as to realize the smooth sliding of the sliding rack 120 inside the unit housing 110, reduce the resistance during sliding, and make the movement of the sliding rack 120 more stable during sliding translation.

[0038] As Figure 2 and Figure 3 shown, there are two conductive parts 132, and two adjacent copper sheets 131 are connected to different conductive parts 132. Thus, the electric energy generated when the plastic sheet 121 and the copper sheet 131 rub against each other can be transported to the energy storage device through the two conductive parts 132, that is, the parallel connection of the two conductive parts 132 can be realized. Therefore, when charging the energy storage device, the voltage remains unchanged, the current capacity is increased, and the stability of electric energy transportation is improved.

[0039] As Figure 4 shown, the electromagnetic generator set 200 includes a generator housing 210, a rotor group 220 and a first stator group 230. The rotor group 220 and the first stator group 230 are coaxially arranged and are both arranged inside the generator housing 210. The rotor group 220 is coaxially connected to the axle of the terminal gear 142. The first stator group 230 is provided with a plurality of first winding coils 231 along the circumferential direction. The rotor group 220 is provided with a plurality of magnets 221 along the circumferential direction, and the magnetic poles of any two adjacent magnets 221 are opposite. The electromagnetic generator set 200 in this embodiment consists of a generator housing 210, a rotor group 220 and a first stator group 230. The rotor group 220 and the first stator group 230 are superposed on each other, and a coreless generator can be formed, which is applicable to various power generation scenarios with low-speed operation and will not be elaborated here.

[0040] Optionally, the electromagnetic generator set 200 further includes a second stator group 240 arranged inside the generator housing 210. The second stator group 240 is provided with a plurality of second winding coils 241 along the circumferential direction. The second stator group 240 is coaxially arranged with the first stator group 230, and the rotor group 220 is arranged between the first stator group 230 and the second stator group 240. In this embodiment, there are two stator groups, namely the first stator group 230 and the second stator group 240. The rotor group 220 rotates between the first stator group 230 and the second stator group 240, so that the first stator group 230 and the second stator group 240 simultaneously cut the magnetic induction lines of the rotor group 220 to generate electricity, and the power generation efficiency is higher.

[0041] In this embodiment, the numbers, shapes, and sizes of the above-mentioned first winding coil 231, the above-mentioned magnet 221, and the above-mentioned second winding coil 241 are the same. The diameters of the circles formed by the centers of several of the above-mentioned first winding coils 231, the circles formed by the centers of several of the above-mentioned second winding coils 241, and the circles formed by the centers of several of the above-mentioned magnets 221 are the same. The above-mentioned first winding coil 231 and the corresponding above-mentioned second winding coil 241 are coaxially arranged. In this embodiment, the first winding coil 231 is fixed in the generator housing 210, and the second winding coil 241 is also fixed in the generator housing 210. The first winding coil 231, the magnet 221, and the second winding coil 241 are all circular and coaxially arranged. When the first winding coil 231 and the second winding coil 241 cut the magnetic induction lines formed by the magnet 221, their cutting frequencies and positions are the same, so that alternating current with the same frequency can be generated.

[0042] Furthermore, the thicknesses of the first winding coil 231 and the second winding coil 241 are different, that is, the number of turns of the coils is different, so as to generate electrical energy with different voltages and supply and store energy to the energy storage device, which will not be elaborated here.

[0043] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Electromagnetic friction composite suspension energy recovery device, characterized in that, Comprising: A triboelectric nanogenerator (100), the triboelectric nanogenerator (100) includes a generator housing (110), a sliding rack (120) and a patch electrode (130), the sliding rack (120) extends along a first direction and is slidably connected inside the generator housing (110) along the first direction, one end of the sliding rack (120) along the first direction protrudes from the generator housing (110) and can be connected to a suspension system, the patch electrode (130) is attached inside the generator housing (110) along the first direction, the sliding rack (120) is disposed opposite to the patch electrode (130), a plastic sheet (121) is provided on a side wall of the sliding rack (120) close to the patch electrode (130) and is distributed at intervals along the first direction, the plastic sheet (121) has elasticity and arches towards the patch electrode (130), the patch electrode (130) includes a conductive part (132) extending along the first direction and a plurality of copper sheets (131) distributed at intervals along the first direction, the plurality of copper sheets (131) are all connected to the conductive part (132), the distance between adjacent two plastic sheets (121) is equal to the distance between adjacent two copper sheets (131), the plastic sheet (121) and the copper sheet (131) generate electricity by friction, and both the conductive part (132) and the sliding rack (120) can be electrically connected to an energy storage device; An electromagnetic generator set (200), a speed increasing gear train (140) is provided inside the generator housing (110), the electromagnetic generator set (200) is provided on an outer wall of the generator housing (110), a starting gear (141) of the speed increasing gear train (140) is meshed and connected to the rack, a shaft of a terminal gear (142) of the speed increasing gear train (140) is connected to an input shaft of the electromagnetic generator set (200), and the electromagnetic generator set (200) can be electrically connected to the energy storage device.

2. The electromagnetic friction composite suspension energy recovery device according to claim 1, wherein Tooth structures are provided at both ends of the sliding rack (120) along a second direction, two speed increasing gear trains (140) are provided corresponding to the electromagnetic generator set (200) one by one, both ends of the sliding rack (120) along the second direction are meshed with the two speed increasing gear trains (140) one by one, and the second direction is perpendicular to the first direction.

3. The electromagnetic friction composite suspension energy recovery device according to claim 2, wherein, The speed-increasing gear train (140) includes a first transmission gear (143), a second transmission gear (144), and a third transmission gear (145). The first transmission gear (143) meshes with the starting gear (141), the second transmission gear (144) meshes with the first transmission gear (143), the third transmission gear (145) is coaxially fixed to the second transmission gear (144), the third transmission gear (145) meshes with the terminal gear (142). The diameter of the first transmission gear (143) is smaller than that of the starting gear (141), the diameter of the second transmission gear (144) is smaller than that of the first transmission gear (143), the diameter of the third transmission gear (145) is larger than that of the second transmission gear (144), and the diameter of the terminal gear (142) is smaller than that of the third transmission gear (145).

4. The electromagnetic friction composite suspension energy recovery device according to claim 3, characterized in that The terminal gear (142) is coaxially arranged with the starting gear (141), and the terminal gear (142) is rotatably connected to the starting gear (141).

5. The electromagnetic friction composite suspension energy recovery device according to claim 4, wherein, The speed-increasing gear train (140) further includes a first support gear (146) and a second support gear (147) arranged coaxially. The first support gear (146) is rotatably connected to the second support gear (147), the first support gear (146) meshes with the starting gear (141), and the second support gear (147) meshes with the starting gear (141).

6. The electromagnetic friction composite suspension energy recovery device according to claim 1, characterized in that The electromagnetic generator set (200) includes a generator housing (210), a rotor group (220), and a first stator group (230). The rotor group (220) and the first stator group (230) are coaxially arranged and are both disposed inside the generator housing (210). The rotor group (220) is coaxially connected to the axle of the terminal gear (142). The first stator group (230) is circumferentially provided with a plurality of first winding coils (231), and the rotor group (220) is circumferentially provided with a plurality of magnets (221). The magnetic poles of any two adjacent magnets (221) are opposite to each other.

7. The electromagnetic friction composite suspension energy recovery device according to claim 6, characterized in that, The electromagnetic generator set (200) further includes a second stator group (240) disposed inside the generator housing (210). The second stator group (240) is circumferentially provided with a plurality of second winding coils (241). The second stator group (240) is coaxially arranged with the first stator group (230), and the rotor group (220) is disposed between the first stator group (230) and the second stator group (240).

8. The electromagnetic friction composite suspension energy recovery device according to claim 7, characterized in that, The number, shape, and size of the first winding coil (231), the magnet (221), and the second winding coil (241) are the same, and the diameters of the circles formed by the centers of a plurality of the first winding coils (231), the circles formed by the centers of a plurality of the second winding coils (241), and the circles formed by the centers of a plurality of the magnets (221) are the same. The first winding coil (231) and the corresponding second winding coil (241) are coaxially arranged.

9. The electromagnetic friction composite suspension energy recovery device according to any one of claims 1-8, characterized in that, There are two conductive parts (132), and two adjacent copper sheets (131) are connected to different conductive parts (132).

10. The electromagnetic friction composite suspension energy recovery device according to any one of claims 1-8, characterized in that, One side wall of the end of the sliding rack (120) facing away from the plastic sheet (121) and the inner wall of the unit housing (110) are provided with a slide rail (111) extending along the first direction, and the other is provided with a slider (122) that is slidably connected in cooperation with the slide rail (111).

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