CONTINUOUSLY VARIABLE TRANSMISSION

摘要

In a continuously variable transmission (1), a support rotation element (40) is disposed on a transmission axle (60) so as to be rotatable relative to a first rotation element (10) and a second rotation element (20). The support rotation element (40) has guide portions (44, 45) that support the guide end sections (52, 53) of a support axle (51) so that oblique rotation of a rotating member (50) is possible. The guide end sections (52, 53) have a curved surface shape that protrudes towards the outside in the diameter direction in relation to the direction in which the contact surfaces (55, 56) of the guide portions (44, 45) follow the center of rotation. The guide portions (44, 45) have groove portions (47, 48) that are formed at surfaces (44a, 44b) that make contact with the guide end sections (52, 53), that are formed following the direction in which the guide end sections (52, 53) move, into which one part of the guide end sections (52, 53) fits, and that make contact with the contact surfaces (55, 56) of the guide end sections (52, 53). Therefore, the durability of the continuously variable transmission (1) can be improved.