Electromagnetic friction composite suspension energy recovery device

Abstract

The present invention belongs to the field of triboelectric power generation technology and discloses an electromagnetic friction composite suspension energy recovery device, comprising a triboelectric nanogenerator and an electromagnetic generator. The triboelectric nanogenerator comprises a housing, a sliding rack, and patch electrodes. The sliding rack is slidably connected to the housing, and the patch electrodes are attached to the housing. Plastic sheets are spaced apart on the sidewalls of the sliding rack. The patch electrodes comprise a conductive portion and a copper sheet connected to the conductive portion, and the plastic sheets and copper sheets generate triboelectric power. A speed-increasing gear train is disposed within the housing, and an electromagnetic generator is disposed on the outer wall of the housing. 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. This electromagnetic friction composite suspension energy recovery device can collect energy from the suspension system and store it for use by other electrical components of the vehicle, thereby saving energy and improving the energy utilization efficiency of the suspension system while being environmentally friendly.

Description

Technical Field

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

[0002] The primary functions of a vehicle's suspension system are to support the vehicle's weight, isolate the vehicle frame from road disturbances, and maintain wheel-to-road contact. Two key components of the suspension system are springs and shock absorbers. Traditional shock absorbers are designed to attenuate vibration by converting vibration energy into heat. However, this dissipated energy actually comes from natural materials or electricity, resulting in significant waste. With the rise of green manufacturing concepts, particularly in the automotive industry, reducing energy waste and improving energy efficiency have become key issues. The suspension system is a crucial component in both energy transmission and consumption in a vehicle. Recovering vibration energy from the suspension system and converting it into electricity for power supply is a viable solution. Consequently, energy recovery suspensions have emerged. These systems not only convert and store energy but also improve vehicle fuel efficiency.

[0003] Triboelectric nanogenerators (TGNs) are a new type of generator that can harvest energy from the surrounding environment in real time and convert it into electrical energy for storage or power generation. However, the output power of TGNs is typically in the microwatt or milliwatt range, which is not high enough for energy harvesting and difficult to operate for power-hungry devices. Therefore, increasing the output power is crucial for the wider adoption of TGNs.

[0004] Therefore, there is an urgent need to provide a new 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 energy from the suspension system and store it for use by other electrical components of the vehicle, thereby saving energy and protecting the environment while improving the utilization efficiency of the energy of the suspension system.

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

[0007] The electromagnetic friction composite suspension energy recovery device includes a friction nano-generator group and an electromagnetic generator group. The friction nano-generator group includes a unit housing, a sliding rack and a patch electrode. The sliding rack extends along a first direction and is slidably connected to the inside of the unit housing along the first direction. One end of the sliding rack along the first direction protrudes from the unit housing and can be connected to the suspension system. The patch electrode is attached to the inside of the unit housing along the first direction. The sliding rack is arranged opposite to the patch electrode. The side wall of the sliding rack at one end close to the patch electrode is provided with plastic sheets spaced along the first direction. The plastic sheet is elastic and arches toward the patch electrode. The sheet electrode includes a conductive portion extending along the above-mentioned first direction and a plurality of copper sheets spaced apart along the above-mentioned first direction. The plurality of copper sheets are all connected to the above-mentioned conductive portion. The distance between two adjacent plastic sheets is equal to the distance between two adjacent copper sheets. The above-mentioned plastic sheets and the above-mentioned copper sheets generate electricity by friction. The above-mentioned conductive portion and the above-mentioned sliding rack can be conductively connected to the energy storage device. A speed-increasing gear train is arranged inside the above-mentioned unit casing, and the above-mentioned electromagnetic generator set is arranged on the outer wall of the above-mentioned unit casing. The starting gear of the above-mentioned speed-increasing gear train is meshed and connected to the above-mentioned rack. The axle of the terminal gear of the above-mentioned speed-increasing gear train is connected to the input shaft of the above-mentioned electromagnetic generator set. The above-mentioned electromagnetic generator set can be conductively connected to the above-mentioned energy storage device.

[0008] Optionally, both ends of the sliding rack along the second direction are provided with tooth structures, two of the speed-increasing gear trains are provided in a one-to-one correspondence with the electromagnetic generator sets, and both ends of the sliding rack along the second direction are engaged with the two speed-increasing gear trains in a one-to-one correspondence, and the second direction is perpendicular to the first direction.

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

[0010] Optionally, the terminal gear is coaxially arranged with the starting gear, and the terminal gear is rotationally 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 of the present invention includes a friction nanogenerator group and an electromagnetic generator group. On the one hand, the friction nanogenerator group includes a sliding rack and a patch electrode disposed inside the unit housing. The sliding rack is connected to the suspension system. As the suspension system operates, the sliding rack moves in a first direction inside the unit housing, causing the plastic sheet on the sliding rack and the copper sheet of the patch electrode to rub against each other. The plastic sheet and the copper sheet are arranged at equal intervals, thereby transmitting the electric energy generated by frictional generation to an energy storage device in a pulsed manner for storage. On the other hand, the electromagnetic generator group can also be driven by the sliding rack and a speed-increasing gear train. The speed-increasing gear train amplifies the movement of the sliding rack, thereby enabling the electromagnetic generator group to operate at high speed, thereby generating sufficient power. The electric energy is also transmitted and stored in the energy storage device for subsequent use. The electromagnetic friction composite suspension energy recovery device can collect energy from the suspension system and store it for use by other electrical components of the vehicle, thereby saving energy and improving the energy utilization efficiency of the suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an axonometric diagram of an electromagnetic friction composite suspension energy recovery device provided in a specific embodiment of the present invention;

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

[0021] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0022] Figure 4 It is an exploded view of an electromagnetic generator set provided in a specific embodiment of the present invention.

[0023] In the picture:

[0024] 100. Friction nanogenerator set; 110. Set 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 set; 210. Generator housing; 220. Rotor set; 221. Magnet; 230. First stator set; 231. First winding coil; 240. Second stator set; 241. Second winding coil. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0026] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0029] The first direction described in this embodiment is Figure 2 The X direction shown in is the length direction of the sliding rack; the second direction is Figure 2 The Y direction shown in FIG is the width direction of the sliding rack, and the X direction is perpendicular to the Y direction.

[0030] like Figures 1 to 3As shown, the electromagnetic friction composite suspension energy recovery device includes a friction nano-generator group 100 and an electromagnetic generator group 200. The friction nano-generator group 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 to the inside of 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 arranged opposite to the patch electrode 130. The side wall of one end of the sliding rack 120 close to the patch electrode 130 is provided with plastic sheets 121 spaced apart along the first direction. The plastic sheet 121 is elastic and arches toward the patch electrode 130. The pole 130 includes a conductive portion 132 extending along the first direction and a plurality of copper sheets 131 spaced apart along the first direction. The plurality of copper sheets 131 are all connected to the conductive portion 132. The distance between two adjacent plastic sheets 121 is equal to the distance between two adjacent copper sheets 131. The plastic sheets 121 and the copper sheets 131 generate electricity by friction. The conductive portion 132 and the sliding rack 120 can be conductively connected to the energy storage device. A speed-increasing gear train 140 is provided inside the unit casing 110. The electromagnetic generator set 200 is provided on the outer wall of the unit casing 110. The starting gear 141 of the speed-increasing gear train 140 is meshed and connected to 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 set 200. The electromagnetic generator set 200 can be conductively connected to the energy storage device.

[0031] The electromagnetic friction composite suspension energy recovery device in this embodiment includes a friction nano-generator group 100 and an electromagnetic generator group 200. On the one hand, the friction nano-generator group 100 includes a sliding rack 120 and a patch electrode 130 arranged 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 along a first direction inside the unit housing 110, 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 arranged at equal intervals, thereby transmitting the electric energy generated by frictional power generation in a pulsed manner to the energy storage device for storage; on the other hand, the electromagnetic generator group 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, thereby enabling the electromagnetic generator group 200 to operate at high speed, thereby generating sufficient power. Electric energy is also transmitted and stored in the energy storage device for subsequent utilization. The electromagnetic friction composite suspension energy recovery device can collect energy from the suspension system and store it for use by other electrical components of the vehicle, thereby saving energy and protecting the environment while improving the energy utilization efficiency of the suspension system.

[0032] In this embodiment, the plastic sheet 121 serves as the negative electrode, and the copper sheet 131 serves as the positive electrode, thereby generating 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, modified materials of polydimethylsiloxane, polyvinylidene fluoride (PVDF) and its derivatives, polyurethane (PU) foam, nanocellulose / polyacrylic acid (PAA) composite materials, etc. can also be selected, and they are not listed here one by one. The copper sheet 131 can be selected not only from copper, but also from 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) aerogels, polylactic acid (PLA)-based materials, etc., which are not listed here.

[0033] Furthermore, both ends of the sliding rack 120 along the second direction are provided with tooth structures. Two speed-increasing gear trains 140 are provided, one corresponding to each of the electromagnetic generator sets 200. The two ends of the sliding rack 120 along the second direction are meshed with the two speed-increasing gear trains 140. 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. This can simultaneously drive the two electromagnetic generator sets 200 to operate at high speed to generate electricity, thereby improving the efficiency and power of power generation.

[0034] In this embodiment, 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 is meshed with the starting gear 141, the second transmission gear 144 is meshed with the first transmission gear 143, the third transmission gear 145 is coaxially fixed with the second transmission gear 144, and the third transmission gear 145 is meshed with the terminal gear 142. The diameter of the first transmission gear 143 is smaller than the diameter of the starting gear 141, the diameter of the second transmission gear 144 is smaller than the diameter of the first transmission gear 143, the diameter of the third transmission gear 145 is larger than the diameter of the second transmission gear 144, and the diameter of the terminal gear 142 is smaller than the diameter of the third transmission gear 145. After three stages of speed increase through the first transmission gear 143, the second transmission gear 144 and the third transmission gear 145, the rotational speed of the terminal gear 142 can be increased as much as possible, and the third transmission gear 145 is coaxially fixed with the second transmission gear 144, which reduces the radial space occupied by the speed-increasing gear system 140, making the structure of the speed-increasing gear system 140 more compact, reducing the volume of the electromagnetic friction composite suspension energy recovery device, and making it easier to install.

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

[0036] Furthermore, the speed-increasing gear train 140 further includes a first support gear 146 and a second support gear 147 coaxially arranged. The first support gear 146 is rotatably connected to the second support gear 147. The first support gear 146 is meshed with the starting gear 141, and the second support gear 147 is meshed with the starting gear 141. The arrangement of the first support gear 146 and the second support gear 147 can support the starting gear 141 and the terminal gear 142 of the speed-increasing gear train 140, thereby reducing vibration and fluctuation during operation of the speed-increasing gear train 140 and ensuring stable operation of the speed-increasing gear train 140.

[0037] As an optional embodiment, one of the sidewalls of the sliding rack 120 at one end facing away from the plastic sheet 121 and the inner wall of the unit housing 110 is provided with a slide rail 111 extending along the first direction, and the other sidewall is provided with a slider 122 that is slidably connected to the slide rail 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 the slide rail 111, thereby enabling the sliding rack 120 to slide smoothly within the unit housing 110, reducing sliding resistance, and making the movement of the sliding rack 120 more stable during sliding translation.

[0038] like Figure 2 and Figure 3 As shown, two conductive parts 132 are provided, and two adjacent copper sheets 131 are connected to different conductive parts 132. Thus, the electrical energy generated by the friction between the plastic sheet 121 and the copper sheet 131 can be transmitted to the energy storage device through the two conductive parts 132, thus achieving parallel connection of the two conductive parts 132. As a result, when charging the energy storage device, the voltage remains constant, the current capacity is increased, and the stability of electrical energy transmission is improved.

[0039] like Figure 4 As shown, the electromagnetic generator set 200 includes a generator housing 210, a rotor assembly 220, and a first stator assembly 230. The rotor assembly 220 and the first stator assembly 230 are coaxially arranged and both disposed within the generator housing 210. The rotor assembly 220 is coaxially connected to the axle of the terminal gear 142. The first stator assembly 230 is circumferentially provided with a plurality of first winding coils 231. The rotor assembly 220 is circumferentially provided with a plurality of magnets 221, with any two adjacent magnets 221 having opposite magnetic poles. The electromagnetic generator set 200 in this embodiment comprises the generator housing 210, the rotor assembly 220, and the first stator assembly 230. The rotor assembly 220 and the first stator assembly 230 are stacked together to form an ironless generator suitable for various low-speed power generation scenarios. This description will not be repeated here.

[0040] Optionally, the electromagnetic generator set 200 further includes a second stator assembly 240 disposed within the generator housing 210. The second stator assembly 240 is circumferentially provided with a plurality of second winding coils 241. The second stator assembly 240 is coaxially disposed with the first stator assembly 230, and the rotor assembly 220 is disposed between the first stator assembly 230 and the second stator assembly 240. In this embodiment, two stator assemblies are provided, namely the first stator assembly 230 and the second stator assembly 240. The rotor assembly 220 rotates between the first stator assembly 230 and the second stator assembly 240, so that the first stator assembly 230 and the second stator assembly 240 simultaneously cut the magnetic flux lines of the rotor assembly 220 to generate electricity, thereby achieving higher power generation efficiency.

[0041] In this embodiment, the first winding coils 231, the magnets 221, and the second winding coils 241 are all identical in number, shape, and size. The circles formed by the centers of the first winding coils 231, the circles formed by the centers of the second winding coils 241, and the circles formed by the centers of the magnets 221 are all of the same diameter. The first winding coils 231 and the corresponding second winding coils 241 are coaxially arranged. In this embodiment, the first winding coils 231 are fixed within the generator housing 210, and the second winding coils 241 are also fixed within the generator housing 210. The first winding coils 231, the magnets 221, and the second winding coils 241 are all circular and coaxially arranged. When the first winding coils 231 and the second winding coils 241 intersect the magnetic flux lines formed by the magnets 221, the intersecting frequencies and positions are identical, thereby generating alternating current of the same frequency.

[0042] Furthermore, the first winding coil 231 and the second winding coil 241 have different thicknesses, that is, the number of turns of the coils is different, thereby generating electrical energy of different voltages to supply power and store energy to the energy storage device, which will not be repeated here.

[0043] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Electromagnetic friction composite suspension energy recovery device, characterized in that: include: A friction nanogenerator group (100) includes a group housing (110), a sliding rack (120), and a patch electrode (130), wherein the sliding rack (120) is extended along a first direction and is slidably connected to the inside of the group housing (110) along the first direction, one end of the sliding rack (120) along the first direction protrudes from the group housing (110) and can be connected to a suspension system, and the patch electrode (130) is attached to the inside of the group housing (110) along the first direction, the sliding rack (120) is arranged opposite to the patch electrode (130), and the sliding rack (120) is close to one end of the patch electrode (130). The end side wall is provided with plastic sheets (121) spaced apart along the first direction, the plastic sheets (121) are elastic and arched toward the patch electrode (130), the patch electrode (130) comprises a conductive portion (132) extending along the first direction and a plurality of copper sheets (131) spaced apart along the first direction, the plurality of copper sheets (131) are all connected to the conductive portion (132), the distance between two adjacent plastic sheets (121) is equal to the distance between two adjacent copper sheets (131), the plastic sheets (121) and the copper sheets (131) generate electricity through friction, and the conductive portion (132) and the sliding rack (120) are both electrically connected to the energy storage device; An electromagnetic generator set (200) is provided with a speed-increasing gear train (140) inside the set housing (110), and the electromagnetic generator set (200) is provided on the outer wall of the set housing (110). The starting gear (141) of the speed-increasing gear train (140) is meshedly connected to the sliding rack (120), and the axle of the terminal gear (142) of the speed-increasing gear train (140) is connected to the input shaft of the electromagnetic generator set (200). 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, characterized in that: Both ends of the sliding rack (120) along the second direction are provided with tooth structures, two speed-increasing gear trains (140) are provided in a one-to-one correspondence with the electromagnetic generator set (200), and both ends of the sliding rack (120) along the second direction are meshed with the two speed-increasing gear trains (140) in a one-to-one correspondence, and the second direction is perpendicular to the first direction.

3. The electromagnetic friction composite suspension energy recovery device according to claim 2, characterized in that: The speed increasing gear train (140) comprises a first transmission gear (143), a second transmission gear (144) and a third transmission gear (145), wherein the first transmission gear (143) is meshed with the starting gear (141), the second transmission gear (144) is meshed with the first transmission gear (143), the third transmission gear (145) is coaxially fixed with the second transmission gear (144), and the third transmission gear (145) is meshed with the terminal gear (142), the diameter of the first transmission gear (143) is smaller than the diameter of the starting gear (141), the diameter of the second transmission gear (144) is smaller than the diameter of the first transmission gear (143), the diameter of the third transmission gear (145) is larger than the diameter of the second transmission gear (144), and the diameter of the terminal gear (142) is smaller than the diameter 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, characterized in that: The speed-increasing gear train (140) further includes a first support gear (146) and a second support gear (147) coaxially arranged, wherein the first support gear (146) is rotatably connected to the second support gear (147), the first support gear (146) is meshed with the starting gear (141), and the second support gear (147) is meshed 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) comprises 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 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 circumferentially provided with a plurality of first winding coils (231); the rotor group (220) is circumferentially provided with a plurality of magnets (221); and any two adjacent magnets (221) have opposite magnetic poles.

7. The electromagnetic friction composite suspension energy recovery device according to claim 6, characterized in that: The electromagnetic generator set (200) further comprises a second stator group (240) arranged inside the generator housing (210), the second stator group (240) being provided with a plurality of second winding coils (241) along the circumferential direction, the second stator group (240) being coaxially arranged with the first stator group (230), and the rotor group (220) being arranged 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 all the same, and the diameters of the circles formed by the centers of several first winding coils (231), the circles formed by the centers of several second winding coils (241) and the circles formed by the centers of several magnets (221) are the same, and 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 to 8, characterized in that: Two conductive parts (132) are provided, 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 to 8, characterized in that: One of the side walls of the sliding rack (120) facing away from the plastic sheet (121) and the inner wall of the unit housing (110) is provided with a slide rail (111) extending along the first direction, and the other is provided with a slider (122) slidably connected to the slide rail (111).

Images