Metal element for continuously variable transmission and method of producing the same

Patent metadata

Field	Value
Publication number	US-10935102-B2
Application number	US-201816045765-A
Country	US
Kind code	B2
Filing date	Jul 26, 2018
Priority date	Jul 28, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A metal element for continuously variable transmission and method of producing the same are provided. A rear surface of a metal element includes first contact parts formed at top positions on the outer side in the radial direction of a saddle surface on left and right sides of an ear part, a second contact part formed in a neck part, and third contact parts formed at a top position of the saddle surface on left and right sides of the body part. In a chord on the driving force transmission side of the metal belt, the first to third contact parts are able to be brought into contact with a front surface of another metal element adjacent to the rear side. A plate thickness of the metal element at the second contact part is smaller than the first contact part and is larger than the third contact part.

First claim

What is claimed is:

1. A metal element for a continuously variable transmission in which a plurality of metal elements are supported on a pair of metal rings to constitute a metal belt for a continuously variable transmission, the metal element comprises
a pair of left and right ring slots with which the pair of metal rings are engaged;
a neck part positioned between the pair of ring slots;
an ear part connected to an outer side in a radial direction of the neck part; and
a body part connected to an inner side in the radial direction of the neck part, and a saddle surface is formed on the body part with a crowning that supports an inner circumferential surface of the metal ring, and
on a front surface of the body part, a rocking edge that extends in a left-right direction along a vicinity of a front end of the saddle surface and an inclined surface that extends from the rocking edge on the inner side in the radial direction to a rear side are formed,
wherein a rear surface of the metal element includes a pair of left and right first contact parts that are formed at top positions on the outer side in the radial direction of the saddle surface on both left and right sides of the ear part, a second contact part that is formed in the neck part, and a pair of left and right third contact parts that are formed at top positions of the saddle surface on both left and right sides of the body part, and
in a chord on a driving force transmission side of the metal belt, the first contact parts, the second contact part, and the third contact parts are able to be brought into contact with a front surface of another metal element adjacent to the rear side, and
a plate thickness of the metal element at the second contact part is smaller than a plate thickness of the metal element at the first contact parts and is larger than a plate thickness of the metal element at the third contact parts.

2. The metal element for a continuously variable transmission according to claim 1 ,
wherein the plate thicknesses of the first contact parts, the second contact part, and the third contact parts are set as an average value of those of the plurality of metal elements.

3. A method of producing a metal element for a continuously variable transmission comprising:
producing the metal element for a continuously variable transmission according to claim 1 by pressing a plate-like metal element component having a cross section using a main punch and a counter punch,
wherein an inclination angle of an inclined surface correspondence part of the metal element component matches an inclination angle of an inclined surface molding part of the counter punch.

4. A method of producing a metal element for a continuously variable transmission comprising:
producing the metal element for a continuously variable transmission according to claim 2 by pressing a plate-like metal element component having a cross section using a main punch and a counter punch,
wherein an inclination angle of an inclined surface correspondence part of the metal element component matches an inclination angle of an inclined surface molding part of the counter punch.

5. The method of producing a metal element for a continuously variable transmission according to claim 3 ,
wherein a rear surface of the metal element includes a first concave part that is formed between the pair of left and right first contact parts and a second concave part that is formed in the neck part,
the main punch includes a first concave part molding part that molds the first concave part and a second concave part molding part that molds the second concave part, and
a protrusion height of the first concave part molding part is greater than a protrusion height of the second concave part molding part.

6. The method of producing a metal element for a continuously variable transmission according to claim 4 ,
wherein a rear surface of the metal element includes a first concave part that is formed between the pair of left and right first contact parts and a second concave part that is formed in the neck part,
the main punch includes a first concave part molding part that molds the first concave part and a second concave part molding part that molds the second concave part, and
a protrusion height of the first concave part molding part is greater than a protrusion height of the second concave part molding part.

Assignees

• Honda Motor Co Ltd

Inventors

• Yagasaki Toru

Classifications

• B21D28/16

  Shoulder or burr prevention {, e.g. fine-blanking} · CPC title

• B21C23/03 Primary

  by both direct and backward extrusion · CPC title

• F16G5/16 Primary

  consisting of several parts · CPC title

• B21D53/14

  belts, e.g. machine-gun belts · CPC title

• B21C25/02

  Dies · CPC title