Power generating device

Patent metadata

Field	Value
Publication number	US-9322395-B2
Application number	US-201414535787-A
Country	US
Kind code	B2
Filing date	Nov 7, 2014
Priority date	Sep 12, 2011
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A power generating device includes an input rotor that is provided to an output shaft of speed up gears so as to be capable of rotating together with the output shaft, an output rotor that is provided to a drive shaft of a generator so as to be capable of rotating together with the drive shaft, and a one-way clutch that is disposed between the input rotor and the output rotor. The one-way clutch connects the input rotor with the output rotor so as to rotate together with the input rotor and the output rotor when the rotation speed of the input rotor exceeds the rotation speed of the output rotor, and the one-way clutch is configured to release the 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.

First claim

What is claimed is:

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; and
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,
wherein 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 and
wherein the power generating device includes a rolling bearing adjacently arranged on an axial side of the one-way clutch
wherein the one-way clutch includes an inner peripheral surface of an outer ring provided to one of the input rotor and the output rotor, an outer peripheral surface of an inner ring provided to another of the input rotor and the output rotor and configured to form plural wedge-shaped spaces in a circumferential direction with the inner peripheral surface of the outer ring, and a roller arranged in each of the plural wedge-shaped spaces,
wherein 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,
wherein 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,
wherein 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,
wherein
the outer peripheral surface of the inner ring is provided in the input rotor, and
wherein the torque limiter is provided with a separation prevention device that prevents the roller in the accommodating recess from being separated from the accommodating recess by centrifugal force due to rotation of the input rotor.

2. The power generating device according to claim 1 , wherein
a pocket configured to be capable of accommodating the roller is provided between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring,
a cage configured to hold the rollers at specified spacing along the circumferential direction and an elastic member configured to bias the roller in the pocket toward a narrowing direction of the wedge-shaped space are provided between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring, and
the accommodating recess is formed to have a depth in which the roller is positioned in a radial inside with respect to the elastic member.

3. The power generating device according to claim 2 , wherein
the elastic member is provided with a block member that blocks at least a part of the accommodating recess that accommodates the roller.

4. The power generating device according to claim 1 , wherein
the separation prevention device is constructed such that a restricting section that restricts the movement of the roller accommodated in the accommodating recess to the radial outside is protruded in an edge of the accommodating recess in the circumferential direction.

5. The power generating device according to claim 1 , wherein
the rolling bearing is a cylindrical rolling bearing.

Assignees

• Jtekt Corp

Inventors

• Fujiwara Hideki
• Ohtsuki Masaaki

Classifications

• H02K7/116

  with gears · CPC title

• H02K7/108

  with friction clutches · CPC title

• F03D9/25

  the apparatus being an electrical generator (F03D9/22 takes precedence) · CPC title

• F16D2300/18

  Sensors; Details or arrangements thereof · CPC title

• F16D43/22

  controlled by both speed and torque · CPC title