Vibration energy collecting device for track

Abstract

The invention relates to an energy collection and conversion device, in particular to a vibration energy collection device for a track, which comprises a vibration energy input unit, a transmission unit and a vibration energy conversion unit, the transmission unit comprises a double-sided rack downward movement transmission assembly, a double-sided rack upward movement transmission assembly and an output shaft, when the double-sided rack moves downwards, the double-sided rack downward movement transmission assembly drives the output shaft to rotate, and when the double-sided rack moves upwards, the double-sided rack upward movement transmission assembly drives the output shaft to rotate; the vibration energy conversion unit comprises a first power generator and a second power generator, the first power generator and the second power generator are connected to the two ends of the output shaft respectively, and the output shaft rotates to drive the first power generator and the second power generator to rotate. The upward or downward movement of the double-sided rack is converted into the unidirectional rotation movement of the output shaft, and the mechanical efficiency is improved.

Description

Technical Field

[0001] The invention relates to an energy collection and conversion device, in particular to a vibration energy collection device for a track. Background Art

[0002] With the development of rail transit, the power consumption of electrical equipment on both sides of the track has become increasingly prominent. At present, these electrical equipment are usually powered by traditional chemical batteries, which not only cause environmental pollution but also have high maintenance costs, especially in remote areas or areas prone to extreme weather. Based on this background, how to utilize the energy in the environment and convert it into electrical energy to continuously power the equipment and form a stable and reliable self-powered system has become a research hotspot.

[0003] Compared with solar energy and wind energy, trackside vibration energy is not limited by weather conditions. When a train passes by, it will cause track vibration, and the vibration amplitude and frequency will increase with the increase of train speed and weight. In order to effectively absorb track vibration energy and convert it into electrical energy, domestic and foreign scholars have carried out various types of structural designs. However, the current vibration energy harvesting device still has the problems of complex transmission structure and low mechanical efficiency, which restricts the further development of track vibration energy recovery and utilization technology. Summary of the invention

[0004] The object of the present invention is to provide a vibration energy harvesting device for rails with greatly improved mechanical efficiency.

[0005] In order to achieve the above object, the present invention provides a vibration energy harvesting device for a track.

[0006] It includes a vibration energy input unit, a transmission unit, and a vibration energy conversion unit. The vibration energy input unit includes a double-sided rack, which is used to connect with the vibration component. The double-sided rack is vertically arranged. When the vibration component vibrates, it drives the double-sided rack to move up and down in the vertical direction.

[0007] The transmission unit includes a double-sided rack downward transmission component, a double-sided rack upward transmission component, and an output shaft. The double-sided rack downward transmission component and the double-sided rack upward transmission component are respectively arranged on both sides of the double-sided rack. The double-sided rack downward transmission component and the double-sided rack upward transmission component are symmetrically arranged relative to the double-sided rack. One end of the double-sided rack downward transmission component is connected to the double-sided rack, and the other end is connected to the output shaft. One end of the double-sided rack upward transmission component is connected to the double-sided rack, and the other end is connected to the output shaft. When the double-sided rack moves downward, the double-sided rack downward transmission component drives the output shaft to rotate. When the double-sided rack moves upward, the double-sided rack upward transmission component drives the output shaft to rotate.

[0008] The vibration energy conversion unit includes a first generator and a second generator. The first generator and the second generator are respectively connected to two ends of the output shaft. The rotation of the output shaft drives the first generator and the second generator to rotate.

[0009] Further, the double-sided rack downward movement transmission component includes a first gear, a first one-way bearing, a first transmission shaft, a second gear, and a third gear; the double-sided rack upward movement transmission component includes a fourth gear, a second one-way bearing, a second transmission shaft, a fifth gear, and a sixth gear; the first gear and the fourth gear are both spur gears; the second gear, the third gear, the fifth gear, and the sixth gear are all spur bevel gears; the first gear is connected to the input end of the first transmission shaft through the first one-way bearing; the second gear is connected to the output end of the first transmission shaft; the third gear is connected to one end of the output shaft; the second gear is meshed with the third gear; the fourth gear is meshed with the third gear through the second one-way bearing The one-way bearing is connected to the input end of the second transmission shaft, the fifth gear is connected to the output end of the second transmission shaft, the sixth gear is connected to the other end of the output shaft, the fifth gear and the sixth gear are meshed with each other, the first gear and the fourth gear are respectively located on both sides of the double-sided rack, the first gear and the fourth gear are both meshed with the double-sided rack, the first transmission shaft and the second transmission shaft are both perpendicular to the output shaft, when the double-sided rack moves downward, the first gear drives the first transmission shaft to rotate, and the fourth gear is disengaged from the second one-way bearing, when the double-sided rack moves upward, the fourth gear drives the second transmission shaft to rotate, and the first gear is disengaged from the first one-way bearing.

[0010] Furthermore, the vibration energy input unit also includes a first slide rail, a second slide rail, a first slider, and a second slider. The first slider and the second slider are fixed in position, the first slide rail and the second slide rail are both vertically arranged, the first slide rail and the second slide rail are respectively located on both sides of the double-sided rack and connected to the double-sided rack, the double-sided rack, the first slide rail, and the second slide rail move up and down synchronously, the first slide rail moves up and down relative to the first slider, and the second slide rail moves up and down relative to the second slider.

[0011] Furthermore, the outer rings of the first one-way bearing and the second one-way bearing are respectively connected with a first flat key and a second flat key, the first gear and the fourth gear are both provided with gear holes, the first one-way bearing and the second one-way bearing are respectively located in the gear hole of the first gear and the gear hole of the fourth gear, the first one-way bearing is connected to the first gear through the first flat key, and the second one-way bearing is connected to the second gear through the second flat key.

[0012] Furthermore, the outer rings of the first one-way bearing and the second one-way bearing are respectively provided with a first keyway and a second keyway, and the first flat key and the second flat key are respectively connected to the first keyway and the second keyway by interference fit.

[0013] Furthermore, the first transmission shaft and the second transmission shaft are respectively connected with a third flat key and a fourth flat key, and the first transmission shaft and the second transmission shaft are respectively connected to the inner rings of the first one-way bearing and the second one-way bearing through the third flat key and the fourth flat key.

[0014] Furthermore, a third keyway and a fourth keyway are respectively provided on the first transmission shaft and the second transmission shaft, and the third flat key and the fourth flat key are respectively connected to the third keyway and the fourth keyway by interference fit.

[0015] Furthermore, it also includes a first axial retaining ring, a second axial retaining ring, a third axial retaining ring, and a fourth axial retaining ring. The first axial retaining ring and the second axial retaining ring are both connected to the first transmission shaft, and the first axial retaining ring and the second axial retaining ring are respectively located on both sides of the first gear. The third axial retaining ring and the fourth axial retaining ring are both connected to the second transmission shaft, and the third axial retaining ring and the fourth axial retaining ring are respectively located on both sides of the fourth gear.

[0016] Furthermore, the vibration energy conversion unit also includes a first speed increaser, a first coupling, a second coupling, a second speed increaser, a third coupling, and a fourth coupling. The input end of the first speed increaser is connected to the output shaft through the first coupling, the output end of the first speed increaser is connected to the first generator through the second coupling, the input end of the second speed increaser is connected to the output shaft through the third coupling, and the output end of the second speed increaser is connected to the second generator through the fourth coupling.

[0017] Furthermore, it also includes a base plate, a first bearing seat, a second bearing seat, a third bearing seat, a fourth bearing seat, a fifth bearing seat, and a sixth bearing seat connected to the base plate, the two ends of the output shaft are respectively arranged on the fifth bearing seat and the sixth bearing seat, the two ends of the first transmission shaft are respectively connected to the first bearing seat and the second bearing seat, the two ends of the second transmission shaft are respectively connected to the third bearing seat and the fourth bearing seat, and the first generator, the second generator, the first speed increaser, and the second speed increaser are all connected to the base plate.

[0018] The vibration energy harvesting device for rails of the present invention has at least the following beneficial effects:

[0019] The vibration energy harvesting device for rails of the present invention has a vibration energy input unit including a double-sided rack, and a transmission unit including a double-sided rack downwardly moving transmission component and a double-sided rack upwardly moving transmission component. The double-sided rack can convert the vibration displacement of the vibration component into the linear motion of the double-sided rack with an extremely small error, and no matter whether the double-sided rack moves upward or downward, it is finally converted into a unidirectional rotational motion of the output shaft, thereby improving the mechanical efficiency of the vibration energy harvesting device for rails of the present invention. In addition, since the double-sided rack downwardly moving transmission component and the double-sided rack upwardly moving transmission component are symmetrically arranged relative to the double-sided rack, the entire device is subjected to uniform force and can run smoothly while further improving the mechanical efficiency.

[0020] The vibration energy harvesting device for rails of the present invention will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall installation diagram of the vibration energy harvesting device for rails of the present invention;

[0022] Figure 2 An exploded view of a vibration energy harvesting device for a track according to the present invention;

[0023] Figure 3 It is a top view of the vibration energy harvesting device for rails of the present invention. DETAILED DESCRIPTION

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, the vibration energy harvesting device for rails of the present invention comprises a vibration energy input unit 01, a transmission unit 02, and a vibration energy conversion unit 03. The vibration energy input unit 01 comprises a double-sided rack 11, which is used to connect with a vibration component. The double-sided rack 11 is vertically arranged. When the vibration component vibrates, the double-sided rack 11 is driven to move up and down in the vertical direction. In this embodiment, the vibration component is a rail.

[0025] The transmission unit 02 includes a double-sided rack downward transmission component 21, a double-sided rack upward transmission component 22, and an output shaft 20. The double-sided rack downward transmission component 21 and the double-sided rack upward transmission component 22 are respectively arranged on both sides of the double-sided rack 11. The double-sided rack downward transmission component 21 and the double-sided rack upward transmission component 22 are symmetrically arranged relative to the double-sided rack 11. One end of the double-sided rack downward transmission component 21 is connected to the double-sided rack 11, and the other end is connected to the output shaft 20. One end of the double-sided rack upward transmission component 22 is connected to the double-sided rack 11, and the other end is connected to the output shaft 20. When the double-sided rack 11 moves downward, the double-sided rack downward transmission component 21 drives the output shaft 20 to rotate. When the double-sided rack 11 moves upward, the double-sided rack upward transmission component 22 drives the output shaft 20 to rotate.

[0026] The vibration energy conversion unit 03 includes a first generator 31 and a second generator 32. The first generator 31 and the second generator 32 are respectively connected to both ends of the output shaft 20. The rotation of the output shaft 20 drives the first generator 31 and the second generator 32 to rotate. The first generator 31 and the second generator 32 are DC generators or AC generators.

[0027] When the track vibrates, the double-sided rack 11 is driven to move up and down. When the double-sided rack 11 moves upward, the output shaft 20 is driven to rotate through the double-sided rack upward moving transmission component 22. The output shaft 20 drives the first generator 31 and the second generator 32 to work and convert the vibration energy into electrical energy. When the double-sided rack 11 moves downward, the output shaft 20 is driven to rotate through the double-sided rack downward moving transmission component 21. The output shaft 20 drives the first generator 31 and the second generator 32 to work and convert the vibration energy into electrical energy.

[0028] The vibration energy harvesting device for rails of the present invention has a vibration energy input unit 01 including a double-sided rack 11, and a transmission unit 02 including a double-sided rack downward transmission component 21 and a double-sided rack upward transmission component 22. The double-sided rack 11 can convert the vibration displacement of the vibrating component into the linear motion of the double-sided rack 11 with an extremely small error, and no matter whether the double-sided rack moves upward or downward, it is eventually converted into a unidirectional rotational motion of the output shaft 20, thereby improving the mechanical efficiency of the vibration energy harvesting device for rails of the present invention. In addition, since the double-sided rack downward transmission component 21 and the double-sided rack upward transmission component 22 are symmetrically arranged relative to the double-sided rack 11, the entire device is subjected to uniform force and can run smoothly while further improving the mechanical efficiency.

[0029] Optionally, the double-sided rack downward moving transmission component 21 includes a first gear 211, a first one-way bearing 212, a first transmission shaft 213, a second gear 214, and a third gear 215, and the double-sided rack upward moving transmission component 22 includes a fourth gear 221, a second one-way bearing 222, a second transmission shaft 223, a fifth gear 224, and a sixth gear 225. In this embodiment, the first gear 211 and the fourth gear 221 are both spur gears, the second gear 214, the third gear 215, the fifth gear 224, and the sixth gear 225 are all spur bevel gears, the first gear 211 is connected to the input end of the first transmission shaft 213 through the first one-way bearing 212, the second gear 214 is connected to the output end of the first transmission shaft 213, the third gear 215 is connected to one end of the output shaft 20, and the second gear 214 is meshed with the third gear 215. The fourth gear 221 is connected to the input end of the second transmission shaft 223 through the second one-way bearing 222, the fifth gear 224 is connected to the output end of the second transmission shaft 223, and the sixth gear 225 is connected to the other end of the output shaft 20. The fifth gear 224 and the sixth gear 225 are meshed with each other. The first gear 211 and the fourth gear 221 are respectively located on both sides of the double-sided rack 11. The first gear 211 and the fourth gear 221 are both meshed with the double-sided rack 11. The first transmission shaft 213 and the second transmission shaft 223 are both perpendicular to the output shaft 20. When the double-sided rack 11 moves downward, the first gear 211 drives the first transmission shaft 213 to rotate, and the fourth gear 221 is disengaged from the second one-way bearing 222. When the double-sided rack 11 moves upward, the fourth gear 221 drives the second transmission shaft 223 to rotate, and the first gear 211 is disengaged from the first one-way bearing 212. The first gear 211, the fourth gear 221, the second gear 214, the third gear 215, the fifth gear 224, and the sixth gear 225 may also adopt other forms of gears to achieve the above purpose through meshing. When the double-sided rack 11 moves downward, the first gear 211 rotates clockwise and the fourth gear 221 rotates counterclockwise. Due to the arrangement of the first one-way bearing 212 and the second one-way bearing 222, the first gear 211 transmits the torque to the first transmission shaft 213 through the first one-way bearing 212, and the fourth gear 221 is separated from the second one-way bearing 222 and does not transmit the torque. The first transmission shaft 213 drives the second gear 214 to rotate clockwise, and then the third gear 215 drives the output shaft 20 to rotate counterclockwise; when the double-sided rack 11 moves upward, the first gear 211 rotates counterclockwise and the fourth gear 221 rotates clockwise. At this time, the fourth gear 221 transmits the torque to the second transmission shaft 223 through the second one-way bearing 222, and the first gear 211 is separated from the first one-way bearing 212 and does not transmit torque.The second transmission shaft 223 drives the fifth gear 224 to rotate clockwise, and the sixth gear 225 drives the output shaft 20 to rotate counterclockwise. When the double-sided rack 11 moves upward or downward, the output shaft 20 always rotates in one direction, that is, the bidirectional linear motion is converted into a unidirectional rotational motion, realizing the rectification of mechanical motion. The first one-way bearing 212 and the second one-way bearing 222 are installed in the first gear 211 and the fourth gear 221 in the same direction, and the third gear 215 and the sixth gear 225 are installed on the same side of the second gear 214 and the fifth gear 224 to ensure that the output shaft 20 always performs a unidirectional rotational motion. The bidirectional vibration of the vibration component track is converted into a unidirectional rotation of the output shaft by moving the transmission component 21 of the double-sided rack downward and the transmission component 22 of the double-sided rack upward, thereby avoiding the energy loss caused by the uncertain direction of the output shaft and improving the mechanical efficiency and power output of the vibration energy harvesting device for the track of the present invention.

[0030] Optionally, the vibration energy input unit 01 further includes a first slide rail 12, a second slide rail 13, a first slider 14, and a second slider 15. The first slider 14 and the second slider 15 are fixed in position. The first slide rail 12 and the second slide rail 13 are both vertically arranged. The first slide rail 12 and the second slide rail 13 are respectively located on both sides of the double-sided rack 11 and are connected to the double-sided rack 11. The double-sided rack 11, the first slide rail 12, and the second slide rail 13 move up and down synchronously. The first slide rail 12 slides up and down relative to the first slider 14, and the second slide rail 13 slides up and down relative to the second slider 15. By arranging the first slide rail 12, the second slide rail 13, the first slider 14, and the second slider 15, it is ensured that the double-sided rack 11 only moves up and down in the vertical direction to avoid offset, thereby ensuring precise transmission and improving mechanical efficiency.

[0031] Optionally, the outer rings of the first one-way bearing 212 and the second one-way bearing 222 are respectively connected with the first flat key 51 and the second flat key 52, the first gear 211 and the fourth gear 221 are both provided with gear holes, the first one-way bearing 212 and the second one-way bearing 222 are respectively located in the gear hole of the first gear 211 and the gear hole of the fourth gear 221, the first one-way bearing 212 is connected to the first gear 211 through the first flat key 51, and the second one-way bearing 222 is connected to the second gear 214 through the second flat key 52, and the flat keys are used for circumferential fixation and transmission of torque.

[0032] Optionally, the outer rings of the first one-way bearing 212 and the second one-way bearing 222 are respectively provided with a first keyway and a second keyway, and the first flat key 51 and the second flat key 52 are respectively connected to the first keyway and the second keyway by interference fit, thereby ensuring the tightness and stability of the connection between the first flat key 51 and the second flat key 52 and the first one-way bearing 212 and the second one-way bearing 222.

[0033] Optionally, the first transmission shaft 213 and the second transmission shaft 223 are respectively connected to the third flat key 53 and the fourth flat key 54. The first transmission shaft 213 and the second transmission shaft 233 are respectively connected to the inner rings of the first one-way bearing 212 and the second one-way bearing 222 through the third flat key 53 and the fourth flat key 54, and are circumferentially fixed and transmit torque through the third flat key 53 and the fourth flat key 54.

[0034] Optionally, a third keyway and a fourth keyway are respectively provided on the first transmission shaft 213 and the second transmission shaft 223, and the third flat key 53 and the fourth flat key 54 are respectively connected to the third keyway and the fourth keyway by interference fit, thereby ensuring the tightness and stability of the connection between the first transmission shaft 213 and the second transmission shaft 223 and the first one-way bearing 212 and the second one-way bearing 222.

[0035] Optionally, it also includes a first axial retaining ring 41, a second axial retaining ring 42, a third axial retaining ring 43, a fourth axial retaining ring 44, a fifth axial retaining ring 45, a sixth axial retaining ring 46, a seventh axial retaining ring 47, and an eighth axial retaining ring 48. The first axial retaining ring 41, the second axial retaining ring 42, and the fifth axial retaining ring 45 are all connected to the first transmission shaft 213, the first axial retaining ring 41 and the second axial retaining ring 42 are respectively located on both sides of the first gear 211, the fifth axial retaining ring 45 is located on one side of the second gear 214, the third axial retaining ring 43, the fourth axial retaining ring 44, and the sixth axial retaining ring 46 are all connected to the second transmission shaft 223, the third axial retaining ring 43 and the fourth axial retaining ring 44 are respectively located on both sides of the fourth gear 221, the sixth axial retaining ring 46 is located on one side of the fifth gear 224, the seventh axial retaining ring 47 and the eighth axial retaining ring 48 are all connected to the output shaft 20, and the seventh axial retaining ring 47 and the eighth axial retaining ring 48 are respectively located on one side of the third gear 215 and the sixth gear 225. The inner ring diameters of the first axial retaining ring 41, the second axial retaining ring 42, the third axial retaining ring 43, and the fourth axial retaining ring 44 are slightly smaller than the shaft diameter to be assembled to ensure that the axial retaining rings do not move axially, and the outer ring diameters of the axial retaining rings are slightly larger than the gear hole diameter to ensure that the gears do not move axially.

[0036] Optionally, the vibration energy conversion unit 03 also includes a first speed increaser 33, a first coupling 34, a second coupling 35, a second speed increaser 36, a third coupling 37, and a fourth coupling 38. The input end of the first speed increaser 33 is connected to the output shaft 20 through the first coupling 34, the output end of the first speed increaser 33 is connected to the first generator 31 through the second coupling 35, the input end of the second speed increaser 36 is connected to the output shaft 20 through the third coupling 37, and the output end of the second speed increaser 36 is connected to the second generator 32 through the fourth coupling 38. The setting of the first speed increaser 33 and the second speed increaser 36 accelerates the rotation speed of the first generator 31 and the second generator 32 when the speed of the output shaft 20 remains unchanged, improves the output of electric energy, and avoids the occurrence of unstable power generation. The first generator 31 and the second generator 32 can also directly use a speed increase generator to achieve the above purpose, and the first coupling 34 can also sample a spring coupling to reduce transmission shock.

[0037] Optionally, it also includes a base plate 61, a first bearing seat 71, a second bearing seat 72, a third bearing seat 73, a fourth bearing seat 74, a fifth bearing seat 75, and a sixth bearing seat 76 connected to the base plate 61, the two ends of the output shaft 20 are respectively arranged on the fifth bearing seat 75 and the sixth bearing seat 76, the two ends of the first transmission shaft 213 are respectively connected to the first bearing seat 71 and the second bearing seat 72, the two ends of the second transmission shaft 223 are respectively connected to the third bearing seat 73 and the fourth bearing seat 74, and the first generator 31, the second generator 32, the first speed increaser 33, and the second speed increaser 36 are all connected to the base plate 61. By setting the base plate 61, the positions of the components are fixed, and they can operate stably without deviation during operation, and the vibration energy harvesting device for the track of the present invention has the characteristics of portability and easy installation, and the device can be placed on two adjacent sleepers on the track. Specifically, the first bearing seat 71, the second bearing seat 72, the third bearing seat 73, the fourth bearing seat 74, the fifth bearing seat 75, and the sixth bearing seat 76 are connected to the bottom plate 61 through the first bearing seat support 711, the second bearing seat support 721, the third bearing seat support 731, the fourth bearing seat support 741, the fifth bearing seat support 751, and the sixth bearing seat support 761, respectively. The first generator 31, the second generator 32, the first speed increaser 33, and the second speed increaser 36 are connected to the bottom plate 61 through the first generator support 311, the second generator support 321, the first speed increaser support 331, and the second speed increaser support 361. The bottom plate 61 is arranged below each support seat, and the bottom plate 61 and each support seat are tightly connected by bolts and nuts. The bottom plate 61 is tightly fitted with the bottom surface of each support seat to ensure that the device can operate stably without shaking when working.

[0038] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A vibration energy harvesting device for a track, characterized in that: The invention comprises a vibration energy input unit (01), a transmission unit (02), and a vibration energy conversion unit (03), wherein the vibration energy input unit (01) comprises a double-sided rack (11), wherein the double-sided rack (11) is used to be connected to a vibration component, wherein the double-sided rack (11) is vertically arranged, and when the vibration component vibrates, the double-sided rack (11) is driven to move up and down in a vertical direction. The transmission unit (02) comprises a double-sided rack downward transmission component (21), a double-sided rack upward transmission component (22), and an output shaft (20); the double-sided rack downward transmission component (21) and the double-sided rack upward transmission component (22) are respectively arranged on both sides of the double-sided rack (11); the double-sided rack downward transmission component (21) and the double-sided rack upward transmission component (22) are symmetrically arranged relative to the double-sided rack (11); the double-sided rack downward transmission component ( 21) one end is connected to the double-sided rack (11), and the other end is connected to the output shaft (20); one end of the double-sided rack upward movement transmission component (22) is connected to the double-sided rack (11), and the other end is connected to the output shaft (20); when the double-sided rack (11) moves downward, the double-sided rack downward movement transmission component (21) drives the output shaft (20) to rotate; when the double-sided rack (11) moves upward, the double-sided rack upward movement transmission component (22) drives the output shaft (20) to rotate. The vibration energy conversion unit (03) comprises a first generator (31) and a second generator (32); the first generator (31) and the second generator (32) are respectively connected to two ends of the output shaft (20); the output shaft (20) rotates to drive the first generator (31) and the second generator (32) to rotate.

2. The vibration energy harvesting device for rails according to claim 1, characterized in that: The double-sided rack downward transmission component (21) comprises a first gear (211), a first one-way bearing (212), a first transmission shaft (213), a second gear (214), and a third gear (215); the double-sided rack upward transmission component (22) comprises a fourth gear (221), a second one-way bearing (222), a second transmission shaft (223), a fifth gear (224), and a sixth gear (225); the first gear (211) and the fourth gear (221) are both spur gears; the second gear (214), The third gear (215), the fifth gear (224), and the sixth gear (225) are all spur bevel gears. The first gear (211) is connected to the input end of the first transmission shaft (213) via the first one-way bearing (212). The second gear (214) is connected to the output end of the first transmission shaft (213). The third gear (215) is connected to one end of the output shaft (20). The second gear (214) meshes with the third gear (215). The fourth gear (221) is connected to the output end of the first transmission shaft (213) via the first one-way bearing (212). The second one-way bearing (222) is connected to the input end of the second transmission shaft (223), the fifth gear (224) is connected to the output end of the second transmission shaft (223), the sixth gear (225) is connected to the other end of the output shaft (20), the fifth gear (224) and the sixth gear (225) are meshed with each other, the first gear (211) and the fourth gear (221) are respectively located on both sides of the double-sided rack (11), and the first gear (211) and the fourth gear (221) are both connected to the double-sided rack (11). 11), the first transmission shaft (213) and the second transmission shaft (223) are both perpendicular to the output shaft (20); when the double-sided rack (11) moves downward, the first gear (211) drives the first transmission shaft (213) to rotate, and the fourth gear (221) is disengaged from the second one-way bearing (222); when the double-sided rack (11) moves upward, the fourth gear (221) drives the second transmission shaft (223) to rotate, and the first gear (211) is disengaged from the first one-way bearing (212).

3. The vibration energy harvesting device for rails according to claim 1, characterized in that: The vibration energy input unit (01) further comprises a first slide rail (12), a second slide rail (13), a first slider (14), and a second slider (15); the first slider (14) and the second slider (15) are fixed in position; the first slide rail (12) and the second slide rail (13) are both vertically arranged; the first slide rail (12) and the second slide rail (13) are respectively located on both sides of the double-sided rack (11) and are connected to the double-sided rack (11); the double-sided rack (11), the first slide rail (12), and the second slide rail (13) move up and down synchronously; the first slide rail (12) moves up and down relative to the first slider (14); and the second slide rail (13) moves up and down relative to the second slider (15).

4. The vibration energy harvesting device for rails according to claim 2, characterized in that: The outer rings of the first one-way bearing (212) and the second one-way bearing (222) are respectively connected with a first flat key (51) and a second flat key (52); the first gear (211) and the fourth gear (221) are both provided with gear holes; the first one-way bearing (212) and the second one-way bearing (222) are respectively located in the gear hole of the first gear (211) and the gear hole of the fourth gear (221); the first one-way bearing (212) and the first gear (211) are connected via the first flat key (51); and the second one-way bearing (222) and the second gear (214) are connected via the second flat key (52).

5. The vibration energy harvesting device for rails according to claim 4, characterized in that: The outer rings of the first one-way bearing (212) and the second one-way bearing (222) are respectively provided with a first keyway and a second keyway, and the first flat key (51) and the second flat key (52) are respectively connected to the first keyway and the second keyway by means of interference fit.

6. The vibration energy harvesting device for rails according to claim 5, characterized in that: The first transmission shaft (213) and the second transmission shaft (223) are respectively connected with a third flat key (53) and a fourth flat key (54); the first transmission shaft (213) and the second transmission shaft (233) are respectively connected to the inner rings of the first one-way bearing (212) and the second one-way bearing (222) through the third flat key (53) and the fourth flat key (54).

7. The vibration energy harvesting device for rails according to claim 6, characterized in that: The first transmission shaft (213) and the second transmission shaft (223) are respectively provided with a third keyway and a fourth keyway, and the third flat key (53) and the fourth flat key (54) are respectively connected to the third keyway and the fourth keyway by means of interference fit.

8. The vibration energy harvesting device for rails according to claim 7, characterized in that: The invention also comprises a first axial retaining ring (41), a second axial retaining ring (42), a third axial retaining ring (43), and a fourth axial retaining ring (44); the first axial retaining ring (41) and the second axial retaining ring (42) are both connected to the first transmission shaft (213); the first axial retaining ring (41) and the second axial retaining ring (42) are respectively located on both sides of the first gear (211); the third axial retaining ring (43) and the fourth axial retaining ring (44) are both connected to the second transmission shaft (223); the third axial retaining ring (43) and the fourth axial retaining ring (44) are respectively located on both sides of the fourth gear (221).

9. The vibration energy harvesting device for rails according to claim 8, characterized in that: The vibration energy conversion unit (03) further comprises a first speed increaser (33), a first coupling (34), a second coupling (35), a second speed increaser (36), a third coupling (37), and a fourth coupling (38); the input end of the first speed increaser (33) is connected to the output shaft (20) via the first coupling (34); the output end of the first speed increaser (33) is connected to the first generator (31) via the second coupling (35); the input end of the second speed increaser (36) is connected to the output shaft (20) via the third coupling (37); and the output end of the second speed increaser (36) is connected to the second generator (32) via the fourth coupling (38).

10. The vibration energy harvesting device for rails according to claim 9, characterized in that: The invention also comprises a base plate (61), a first bearing seat (71) connected to the base plate (61), a second bearing seat (72), a third bearing seat (73), a fourth bearing seat (74), a fifth bearing seat (75), and a sixth bearing seat (76); two ends of the output shaft (20) are respectively arranged on the fifth bearing seat (75) and the sixth bearing seat (76); two ends of the first transmission shaft (213) are respectively connected to the first bearing seat (71) and the second bearing seat (72); two ends of the second transmission shaft (223) are respectively connected to the third bearing seat (73) and the fourth bearing seat (74); the first generator (31), the second generator (32), the first speed increaser (33), and the second speed increaser (36) are all connected to the base plate (61).

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