Patent ID: 9035476
Filing Date: 2015-05-19
Classification: F03D,F05B,F16D,H02K,Y02E

Abstract:
1. A power generating device comprising: speed up gears including a main shaft that rotates by external force, a rotation transmission mechanism that receives rotation of the main shaft to increase speed of the rotation of the main shaft, and a roller bearing that rotatably supports an output shaft that outputs running torque of the rotation transmission mechanism; a generator including a drive shaft which is rotated by receiving rotation of the output shaft and configured to generate electricity in connection with rotation of a rotor which rotates together with the drive shaft; an input rotor provided to the output shaft to be capable of rotating together with the output shaft; an output rotor provided to the drive shaft to be capable of rotating together with the drive shaft and concentrically arranged on a radial inside or a radial outside of the input rotor; a one-way clutch disposed between the input rotor and the output rotor, the one-way clutch being configured to connect the input rotor with the output rotor to rotate together with the input rotor and the output rotor when a rotation speed of the input rotor exceeds a rotation speed of the output rotor, and the one-way clutch being configured to release a connection between the input rotor and the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor; and a rolling bearing disposed between the input rotor and the output rotor and configured to support the input rotor and the output rotor so that the input rotor and the output rotor relatively rotate with each other, wherein: the one-way clutch includes an outer peripheral surface of an inner ring, an inner peripheral surface of an outer ring, and a roller arranged in each of plural wedge-shaped spaces formed between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring, the one-way clutch is configured to connect the input rotor with the output rotor to rotate together with the input rotor and the output rotor by engaging the roller with the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring, the one-way clutch is configured to release the connection between the input rotor and the output rotor by disengaging engagement of the roller with the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring, the one-way clutch includes an annular cage configured to hold the plural rollers at specified spacing along a circumferential direction, a pair of the rolling bearings is disposed between the input rotor and the output rotor, the paired rolling bearings are arranged on respective axial sides of the one-way clutch so that each of the paired rolling bearings is adjacent to the one-way clutch and an axial end of each of the paired rolling bearings is capable of coming into contact with a corresponding one of axial end faces of the annular cage of the one-way clutch, the paired rolling bearings are a pair of cylindrical roller bearings that include plural cylindrical rollers and a portion with which end faces of the plural cylindrical rollers in an axial direction come into sliding contact, the axial end faces of the annular cage come into contact with the portion in the pair of the cylindrical roller bearings, the one-way clutch is provided with a torque limiter configured to release the connection between the input rotor and the output rotor when transmission torque from the input rotor to the output rotor exceeds an upper limit, the torque limiter is provided with an accommodating recess that is formed in the outer peripheral surface of the inner ring, and that accommodates the roller separated from the wedge-shaped space, when the transmission torque exceeds the upper limit, to disengage the engagement of the roller with the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring, a plurality of cam surfaces are formed in the outer peripheral surface of the inner ring, and the accommodating recess is formed in a position between two of the plurality of cam surfaces that are closest to each other in the circumferential direction.