CN-116890563-B - Composite mechanical energy conversion bicycle wheel

CN116890563BCN 116890563 BCN116890563 BCN 116890563BCN-116890563-B

Abstract

The invention relates to a composite mechanical energy conversion bicycle wheel which comprises a rotating assembly, a composite conversion assembly and a reciprocating sweeping and scraping assembly, wherein the rotating assembly comprises a wheel frame, spokes and a plurality of permanent magnets, the spokes are radially fixed in the wheel frame, the permanent magnets are fixed on the spokes, the composite conversion assembly comprises a rotating connecting piece, a plurality of piezoelectric vibrators, magnets and coils, the rotating connecting piece is rotationally connected with the wheel frame, the piezoelectric vibrators are radially fixed on the rotating connecting piece, the magnets and the coils are fixed on each piezoelectric vibrator, and a PZT thin film piezoelectric layer is arranged on the surface of each piezoelectric vibrator. The piezoelectric transducer adopts a piezoelectric and magnetoelectric combined mode to collect and convert vibration energy, and compared with a single piezoelectric mode in the prior art, the piezoelectric transducer improves energy harvesting efficiency.

Inventors

MEI JIE
WU JUNYU
ZHANG LINGRUI
WANG ZHENGYU
CHEN KUN
SUN HONGBO

Assignees

武汉理工大学

Dates

Publication Date: 20260512
Application Date: 20230703

Claims (7)

1. A composite mechanical energy conversion bicycle wheel, comprising: the rotating assembly comprises a wheel frame, spokes and a plurality of permanent magnets, wherein the spokes are fixed in the wheel frame in the radial direction, the permanent magnets are fixed on the spokes, a copper plate is arranged between the spokes, and the copper plate is fixed with the wheel frame; The composite conversion assembly comprises a rotation connecting piece, a plurality of piezoelectric vibrators, a magnet and a coil, wherein the rotation connecting piece is rotationally connected with the wheel frame, the piezoelectric vibrators are radially fixed on the rotation connecting piece, the magnet and the coil are fixed on each piezoelectric vibrator, and a PZT thin film piezoelectric layer is arranged on the surface of each piezoelectric vibrator; the rotating assembly further comprises a shaft barrel, the shaft barrel is arranged at the circle center of the wheel frame, the spoke is fixed with the shaft barrel, the rotating connecting piece comprises a rotating shaft, a sleeve and a bearing, the rotating shaft is fixed with the shaft barrel, the rotating shaft is fixed with the bearing, the piezoelectric vibrator is fixed with the sleeve, and the sleeve is fixed with the bearing and can rotate relative to the shaft barrel.
2. The composite mechanical energy-translating bicycle wheel of claim 1, wherein: The two composite conversion assemblies are symmetrically arranged on two sides of the rotating assembly.
3. The composite mechanical energy-translating bicycle wheel of claim 1, wherein: the included angles between the adjacent spokes are the same.
4. The composite mechanical energy-translating bicycle wheel of claim 1, wherein: Each piezoelectric vibrator is fixedly provided with two magnets, one magnet is located at the end part of the piezoelectric vibrator far away from the rotating connecting piece, and the other magnet is located at the middle part of the piezoelectric vibrator.
5. The composite mechanical energy-translating bicycle wheel of claim 4, wherein: The magnet and the coil are fixed on one surface of the piezoelectric vibrator facing the rotating assembly, and the PZT thin film piezoelectric layer is attached to one surface of the piezoelectric vibrator facing away from the rotating assembly.
6. The composite mechanical energy-translating bicycle wheel of claim 5, wherein: The composite conversion assembly comprises eight piezoelectric vibrators, and the included angles between adjacent piezoelectric vibrators are the same.
7. The composite mechanical energy-translating bicycle wheel of claim 1, wherein: The power supply circuit comprises a power chip U1, an inductor L1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1 and a diode D2, wherein a PZ1 pin and a PZ2 pin of the power chip U1 serve as energy input ends, a SW pin of the power chip U1 is electrically connected with one end of the inductor L1, the other end of the inductor L1 is electrically connected with one end of the capacitor C61 and forms a first output end JB1 electrically connected with the capacitor C1, a Vin pin of the power chip U1 is electrically connected with a cathode of the diode D1, one end of the capacitor C4 is electrically connected with one end of the capacitor C4 and forms a second output end JB2 electrically connected with a boosting module, an anode of the diode D1 is electrically connected with a cathode of the diode D2, the other end of the capacitor C1 is electrically connected with one end of the capacitor C2, the other end of the capacitor C2 is electrically grounded, and the other end of the capacitor C2 is electrically connected with one end of the capacitor C4, and the other end of the capacitor C4 is electrically grounded, and the other end of the capacitor C1 is electrically connected with the capacitor C4.

Description

Composite mechanical energy conversion bicycle wheel Technical Field The invention relates to the technical field of wheel power generation, in particular to a composite mechanical energy conversion bicycle wheel. Background Mechanical vibration is most common, and has the characteristics of high energy density and no limitation by factors such as geographical environment, so the research significance based on the mechanical vibration is great. In daily life, bicycles are the most common travel tool for us, and the mechanical energy contained in the bicycles is huge. At present, most of the power generation bicycles on the market only capture energy based on piezoelectricity and convert mechanical energy into electric energy. For example, patent CN207368907U provides a portable piezoelectric ceramic power generation device for a bicycle, which comprises a protective shell, wherein a high-magnetism permanent magnet and a piezoelectric ceramic are installed in the protective shell, the high-magnetism permanent magnet and the piezoelectric ceramic are adhered together, one end of the piezoelectric ceramic is installed on the protective shell, a wire is arranged on the piezoelectric ceramic, the protective shell is fixed on a bicycle rear wheel support through a fixing clamp and distributed on two sides of the bicycle rear wheel, a second high-magnetism permanent magnet is arranged on a bicycle rear wheel spoke and is embedded and fixed in a shell through Ping Rui screws on the outer side of the second high-magnetism permanent magnet, electromagnetic induction is generated between the high-magnetism permanent magnet and the second high-magnetism permanent magnet, and two second high-magnetism permanent magnets are installed, and the interval between the two high-magnetism permanent magnets is 180 degrees. But it has a problem in that the mode captures energy in too single a manner, resulting in a large loss in energy transmission. Disclosure of Invention In view of the above, the invention provides a composite mechanical energy conversion bicycle wheel, which adopts various energy harvesting modes to combine, thereby improving energy harvesting efficiency. In order to achieve the aim, the technical scheme for solving the technical problems is to provide a composite mechanical energy conversion bicycle wheel, which comprises a rotating assembly, a rotating assembly and a rotating assembly, wherein the rotating assembly comprises a wheel frame, a spoke and a plurality of permanent magnets, the spoke is fixed in the wheel frame in the radial direction, and the permanent magnets are fixed on the spoke; The composite conversion assembly comprises a rotation connecting piece, a plurality of piezoelectric vibrators, a magnet and a coil, wherein the rotation connecting piece is rotationally connected with the wheel frame, the piezoelectric vibrators are radially fixed on the rotation connecting piece, each piezoelectric vibrator is fixedly provided with the magnet and the coil, and the surface of each piezoelectric vibrator is provided with a PZT thin film piezoelectric layer. Further, the two composite conversion assemblies are symmetrically arranged on two sides of the rotating assembly. Further, copper plates are arranged between the spokes and are fixed with the wheel frame. Further, the included angles between the adjacent spokes are the same. Further, two magnets are fixed on each piezoelectric vibrator, one magnet is located at the end part of the piezoelectric vibrator far away from the rotating connecting piece, and the other magnet is located at the middle part of the piezoelectric vibrator. Further, the magnet and the coil are fixed on one surface of the piezoelectric vibrator facing the rotating assembly, and the PZT thin film piezoelectric layer is attached to one surface of the piezoelectric vibrator facing away from the rotating assembly. Further, the composite conversion assembly comprises eight piezoelectric vibrators, and included angles between adjacent piezoelectric vibrators are the same. Further, the rotating assembly further comprises a shaft barrel, the shaft barrel is arranged at the circle center of the wheel frame, and the spoke is fixed with the shaft barrel. Further, the rotating connecting piece comprises a rotating shaft, a sleeve and a bearing, wherein the rotating shaft is fixed with the shaft barrel, the rotating shaft is fixed with the bearing, the piezoelectric vibrator is fixed with the sleeve, and the sleeve is fixed with the bearing and can rotate relative to the shaft barrel. Further, the power supply circuit further comprises a conversion circuit, the conversion circuit comprises a power supply chip U1, an inductor L1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1 and a diode D2, a PZ1 pin and a PZ2 pin of the power supply chip U1 serve as energy input ends, a SW pin of the power supply chip U1 is electrically connected with one end o