Transmission belt for buncher

Abstract

In a belt for a continuously variable transmission, a first line on a lower edge of an element body of a metal element is determined, and a second line straightforwardly connecting a lower end of a V-face to which a load is applied from a V-groove in a pulley and an inner end of a saddle surface is determined, so that when a downward load is applied from a metal ring assembly to an outer end of the saddle surface, the folding-resistant strength of the element body is uniform laterally. The position of the recess is determined in the vicinity of a point of intersection of the first and second lines. The lower edge of the element body is defined by the first line inside the recess and by the second line outside the recess. The durability of the metal element can be enhanced by devising the shape of the lower edge of the element body of the metal element in this manner.

Description

technical field [0001] The present invention relates to supporting a pair of left and right ring grooves formed in a plurality of metal elements on a left and right pair of metal ring assemblies formed by stacking a plurality of ring-shaped metal rings, and wrapping them around a driving pulley and a driven pulley. A continuously variable transmission belt that transmits driving force. Background technique [0002] In such a continuously variable transmission belt, in order to press the left and right V-shaped surfaces of the metal element to the V-shaped groove of the pulley with uniform surface pressure to prevent partial wear, the left and right sides of the V-shaped surface near the lower edge of the main body of the element An upward recess is formed at the end so that the element main body is easily bent in the upward and downward direction at the position of the recess. This technique is known from Japanese Patent Publication No. 63-40979 and US Patent No. 4915677. ...

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned prior art, when the V-shaped surface of the metal element is subjected to the compressive load from the V-shaped groove of the pulley, the V-shaped surface does not move in parallel but moves at a variable angle, so that the upper or lower part of the V-shaped surface is not uniform. Butting against the V-shaped groove of the pulley will inevitably cause partial wear, which is difficult to eliminate

In addition, when a downward load is applied to the saddle surface of the metal element by the tensile force of the metal ring assembly, the bending load on the saddle surface is distributed unevenly in the left and right directions, and there is a problem that the durability of the metal element decreases.

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