Wearable human body upper limb motion energy harvester

A wearable human body upper limb kinetic energy harvester, comprising a base (8), wherein a cover plate (7) is fixed to a top wall of the base, a high-speed shaft, a low-speed shaft (9), and a gear shaft of a fixed gear (3) are sequentially spaced from left to right in a cavity between the base and the cover plate along a vertical direction, a helically arranged unidirectional excitation mechanism, a rotor mechanism (5) of a rotor power generation module, and a limiting block are coaxially and vertically spaced and connected to the high-speed shaft, and upper and lower ends of a gear shaft of the low-speed shaft are respectively and fixedly connected with an inner ring of a bearing installed in the cover plate and the base;

• the low-speed shaft is fixedly sleeved with a driving gear (2) and a driven gear (6), the driving gear is fixedly connected with the driven gear along the vertical direction, a bottom of the high-speed shaft and a bottom of the gear shaft of the fixed gear are fixed to the base, and a lower end of the gear shaft is fixedly connected with the base;
• one end of a fixed beam (4) is tightly pressed against the fixed gear, and the other end of the fixed beam is fixedly connected to the base;
• the fixed gear (3) engages with the driven gear (6), a ratio of the number of teeth of the fixed gear to the number of teeth of the driven gear is larger than 1, and the fixed beam is provided with a fixed end, wherein the fixed end is configured to be fixed to the human body;
• the helically arranged unidirectional excitation mechanism comprises an outer layer (10) with an internal threaded hole in a middle, the outer layer is positioned above the rotor mechanism, external threads are arranged on an outer wall of a lower portion of an inner layer (11), and the external threads on the lower portion of the inner layer are in threaded connection with the internal threaded hole of the outer layer;
• the driven gear is arranged on an upper portion of the outer layer and connected with the driving gear (2) through a belt, and a diameter of the driving gear is larger than that of the driven gear;
• and the inner layer and the limiting block are fixedly connected with the base, the rotor mechanism is rotationally connected with the high-speed shaft, a spring sleeves the high-speed shaft between the rotor mechanism and the limiting block, upper and lower ends of the spring are respectively and fixedly connected with the rotor mechanism and the limiting block, the outer layer is configured to move up and down away from the rotor mechanism or make contact with the rotor mechanism, and drive the rotor mechanism to rotate under the action of force of friction, and a stator of the rotor power generation module is installed inside the base.