Spring for use in one-way clutch and one-way clutch

Patent metadata

Field	Value
Publication number	US-2016138663-A1
Application number	US-201414899749-A
Country	US
Kind code	A1
Filing date	Mar 27, 2014
Priority date	Jun 19, 2013
Publication date	May 19, 2016
Grant date	—

Abstract

A spring ( 11 b ) for a one-way clutch is provided that can suppress skewing of rollers and can restrain to a low level the stress generated due to bending of elastic pressure sections ( 23 b 1, 23 b 2 ). The spring ( 11 b ) is formed by subjecting an elastic metal plate to a bending process and comprises: a base section ( 22 b ) comprising a flat base-plate section ( 25 ); and a pair of elastic pressure sections ( 23 b 1, 23 b 2 ) formed by bending to an acute angle the both ends in the length direction of the base-plate section ( 25 ) towards the one side in the thickness direction of the base-plate section ( 25 ); and a pair of elbow sections ( 24 a ) located on the portions connecting the elastic pressure sections ( 23 b 1, 23 b 2 ) and the base-plate section ( 25 ). In particular, the elastic pressure sections ( 23 b 1, 23 b 2 ) cross each other in the middle sections in the length direction thereof.

First claim

What is claimed is:

1 . A spring for a one-way clutch, comprising:
a base section having a flat shaped base-plate section that is made of a metal sheet having elasticity; a pair of elastic pressure sections formed by bending portions on both sides in a lengthwise direction of the base-plate section at an acute angle to one side in a thickness direction of the base-plate section, with each having a tip-end section; and a pair of elbow sections provided in continuous sections between the pair of elastic pressure sections and the base-plate section; wherein the pair of elastic pressure sections cross each other in middle sections in the lengthwise direction thereof.

2 . The spring for a one-way clutch according to claim 1 , wherein each of the tip-end sections of the pair of elastic pressure sections is bent so that a surface that is on an opposite side from a surface that faces the base-plate section is a convex surface.

3 . The spring for a one-way clutch according to claim 1 , wherein a U-shaped holding section is provided in a portion of the base section on another side in the thickness direction of the base-plate section so as to be continuous with a middle section in the lengthwise direction of the base-plate section.

4 . The spring for a one-way clutch according to claim 3 , wherein a stopper extending toward the other side in the thickness direction of the base-plate section is provided on part of the holding section.

5 . A one-way clutch, comprising:
a member corresponding to an inner ring; a member corresponding to an outer ring that is arranged around the member corresponding to the inner ring, and is concentric with the member corresponding to the inner ring; plural locking members provided between an outer-circumferential surface of the member corresponding to the inner ring, and an inner-circumferential surface of the member corresponding to the outer ring; a retainer holding the locking members; and springs secured to the retainer and pressing the locking members in a direction so as to engage with both the outer-circumferential surface of the member corresponding to the inner ring, and the inner-circumferential surface of the member corresponding to the outer ring; wherein the locking members engage with the outer-circumferential surface of the member corresponding to the inner ring, and the inner-circumferential surface of the member corresponding to the outer ring so as to transmit torque therebetween only when there is a tendency for relative rotation in a specified direction between the member corresponding to the inner ring and the member corresponding to the outer ring, and each of the springs is constructed by the spring for a one-way clutch according to claim 1 .

Assignees

• Nsk Ltd

Inventors

• Mori Hirofumi

Classifications

• F16D2041/0605

  Spring details · CPC title

• F16D41/067 Primary

  and the members being distributed by a separate cage encircling the axis of rotation · CPC title

• F16F1/18

  Leaf springs {(planar springs in general F16F1/027; "Belleville"-type springs with generally radial arms F16F1/324)} · CPC title

• F16C19/28

  with two or more rows of rollers · CPC title

• F16C33/485

  with two or more juxtaposed cages joined together or interacting with each other · CPC title