Elements of drive power transfer belt of belt-drive continuously variable transmission for vehicle

摘要

Provided are elements arranged along a ring of a drive power transfer belt wound on pulleys of a belt-drive continuously variable transmission. Each element has a recess at one side of the element and a projection projecting from the other side to fit into the recess of the adjacent element. The projection has a first engagement portion provided at its base side such that a predetermined engagement gap is created on the radially outer side when the projection fits in the recess of the adjacent element, and a second engagement portion provided at the tip side of the projection and decreasing in diameter toward the tip of the projection from the first engagement portion. The gradient with which the diameter of the second engagement portion decreases is larger than the gradient with which the diameter of the first engagement portion decreases toward the tip of the projection.

主权项

1. A set of elements that are arranged, in an element thickness direction, in series along a looped ring of a drive power transfer belt wound on a pair of pulleys of a belt-drive continuously variable transmission, each of the elements comprising:
a recess that is provided at one side of the element; a projection projecting from the other side of the element to fit into the recess of the adjacent element, the projection having a first engagement portion that is provided at a base side of the projection such that a predetermined engagement gap is created on a radially outer side of the first engagement portion when the projection fits in the recess of the adjacent element, wherein a diameter of the first engagement portion at least partially decreases toward a tip of the projection from the base side of the projection, and a second engagement portion which is provided at a tip side of the projection and that, at least partially, decreases in diameter thereof toward the tip of the projection from the first engagement portion, wherein a gradient with which the diameter of the second engagement portion decreases toward the tip of the projection is larger than a gradient with which the diameter of the first engagement portion decreases toward the tip of the projection, and an inclined face is partially provided at an outer peripheral face of the second engagement portion.