Honda Motor Co., Ltd.

Soichiro Sumida

Toru Yagasaki

A rear surface of a metal element () includes first contact portions (C) formed on both right and left end sides of an ear portion (), a second contact portion (C) formed in a neck portion (), and a third contact portion (C) formed in a central portion in a transverse direction in the vicinity of a locking edge () of a body portion (). The first contact portions (C), the second contact portion (C), and the third contact portion (C) can come into contact with a front surface of another adjacent metal element () on a rear side. A plate thickness of the metal element () in the second contact portion (C) is smaller than the plate thickness of the metal element () in the first contact portions (C) and is greater than the plate thickness of the metal element () in the third contact portion (C).

Metal element for continuously variable transmission and method of manufacturing metal element for continuously variable transmission

First and second inclined faces of an inclined face extending radially inward and rearward from a rocking edge formed so as to coincide with a front edge of a saddle face of a body part of a metal element are molded by press forming a metal element material using a mold. An inclined face-corresponding part of the metal element material, which corresponds to the inclined face of the metal element, includes a first inclined face-corresponding portion inclined rearward at a first inclination angle from a rocking edge-corresponding part, and a second inclined face-corresponding portion inclined rearward at a second inclination angle, which is larger than the first inclination angle, from a radially inner end of the first inclined face-corresponding portion. The mold includes a first inclined face-molding portion inclined rearward at the first inclination angle from a rocking edge-molding portion abutting against the rocking edge-corresponding part.

Method for producing metal element for continuously variable transmission and metal element for continuously variable transmission

In a metal belt for a continuously variable transmission having a saddle face of a metal element and a rocking edge positioned at substantially the same position in the radial direction, a rocking edge is provided at a radially outer end of a front face of a body part, the rocking edge being a fulcrum for pitching of the metal element of the metal belt which is wound around a drive pulley and a driven pulley and transmits a driving force between the two pulleys, and a recess is provided extending from a front face of a neck part to a front face of the body part. Thus, it is possible to minimize a space created between the front and rear metal elements and reduce the bending stress applied to the metal elements, thereby minimizing degradation of the power transmission efficiency.

Metal belt for continuously variable transmission

A continuously variable transmission metal element includes a first ring slot, a second ring slot, a neck portion, an ear portion, and a body portion. The body portion includes an inclined surface. A plate thickness of the continuously variable transmission metal element in a longitudinal direction at an inner end of the inclined surface in a radial direction is larger than a distance between a first metal mold molding surface of a first metal mold and a second metal mold molding surface of a second metal mold in the longitudinal direction at a position corresponding to the inner end of the inclined surface. The first metal mold and the second metal mold constitute a metal mold to press a roughly formed metal element material between the first metal mold molding surface and the second metal mold molding surface so as to provide the continuously variable transmission metal element.

Continuously variable transmission metal element

A metal belt for a continuously variable transmission includes a metal element wound around a drive pulley and a driven pulley and transmits a driving force between the two pulleys, in which a rocking edge is provided at the radially outer end of a front face of a body part. The rocking edge being a fulcrum for pitching of the metal element, and a recess is formed in a rear face of a neck part, and therefore, when the metal element on the rear side is displaced toward the radially outer side with respect to the metal element on the front side, the rocking edge of the metal element on the rear side enters a ring slot and the recess of the metal element on the front side, and the metal element on the rear side moves so as to be closer to the metal element on the front side.

An elementfor a metallic belt in a belt-type continuously variable transmission has a structure in which: a belt radial outer portionof a metallic beltis linearly shaped to come into line contact with a pulley radial inner portionwhich is a constant-angle inclined generatrix portion of a pulleyor; a projecting portionlocated below a locking edge portionand extending inward in the belt radial direction is provided at each of the lower ends of both side edges of the element; and when the elementand a pulley radial outer portionwhich is a curved generatrix portion of the pulleyorcontact each other, the projecting portionbends inward in the axial direction of the pulleyor

Element for metallic belt

A metal belt is wound around a drive pulley and a driven pulley of a continuously variable transmission. Since intervals between multiple adjuster metal element groups are set so as to avoid that the number of the adjuster metal element groups simultaneously existing on a driving-side chord portion of the metal belt between the drive pulley and the driven pulley is 2 or more, it is possible to prevent large vibration which would occur if two or more adjuster metal element groups would exist on the driving-side chord portion of the metal belt. Furthermore, since the multiple adjuster metal elements are distributionally disposed in the multiple adjuster metal element groups, it is possible to decrease imbalance among the adjuster metal element groups, compared with a case where all the adjuster metal elements are disposed in a single adjuster metal element group. Thereby, the vibration can be reduced more.

An element for a metallic belt in a continuously variable transmission capable of reducing misalignment while ensuring friction force in a small diameter state is provided. An elementfor a metallic belt in a belt-type continuously variable transmission has a structure in which a side edge of the elementof a metallic beltthat contacts a drive pulleyand a driven pulleyincludes: a belt radial outer portionthat is located on a radial outer side of the metallic beltand linearly shaped to follow a radial inner portionas a constant-angle inclined generatrix portion; and a belt radial inner portionthat is located on a radial inner side of the metallic beltand curved to taper inward in the belt radial direction to gradually increase an inclination angle.

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Wako, Japan

Soichiro Sumida