Continuously variable transmission belt and continuously variable transmission

摘要

A continuously variable transmission belt includes rings each superimposing annular component pieces on each other's inner and outer peripheries, and plural elements attached to the rings side by side in a circumferential direction. Each element includes a neck portion. The rings are disposed on opposite sides of the neck portion. The elements contact a driving pulley and a driven pulley. A lubrication oil discharge mechanism discharges out a lubrication oil in at least one of a gap between the component pieces, and a gap between each ring and the elements. A function of discharging the lubrication oil present in a region remote from the neck portion is higher than a function of discharging the lubrication oil present in a region near the neck portion. Thereby, the rings to which the elements are attached or the component pieces of the rings restrain decline in the centering characteristic in the width direction.

主权项

1. A continuously variable transmission belt that has a ring constructed by superimposing annular component pieces on each other's inner and outer peripheries, and a plurality of elements stacked in a circumferential direction of the ring and attached to the ring, wherein each of the elements is provided with a ring-receiving portion, and the ring is disposed in the ring-receiving portion, and the elements contact a driving pulley (5) and a driven pulley, characterized by comprising:
a friction force equalization mechanism that makes a friction force that occurs due to contact between a bottom surface that constitutes the ring-receiving portion and an inner peripheral surface of the ring uniform in the width direction of the ring; each of the elements is provided with a neck portion extending in a radius direction of the ring, and each of the elements is provided with two ring-receiving portions on two opposite sides of the neck portion in the width direction of the rings, and the ring is disposed in each of the two ring-receiving portions, and the bottom surface of each of the two ring-receiving portions and the inner peripheral surface of a corresponding one of the rings contact each other; and the friction force equalization mechanism is a partition groove that partitions each bottom surface into a first region near to the neck portion and a second region apart from the neck portion, and that prevents the lubrication oil from reaching the first region via the second region, and an area of the first region is smaller than the area of the second region.