Friction-type continuously variable transmission

A friction-type continuously variable transmission comprising:

• a first rolling element being annular and centered on a principal axis extending in a vertical direction;
• a second rolling element being annular and centered on the principal axis;
• a third rolling element being annular and centered on the principal axis;
• a plurality of planetary rollers arranged in a circumferential direction about the principal axis;
• a plurality of support pins each of which is arranged to rotatably support a separate one of the planetary rollers;
• and
• a planetary roller support portion arranged to support each support pin such that the support pin is capable of inclining in a section including the principal axis;
• wherein
• each planetary roller includes a recessed portion or projecting portion in a shape of a circular ring in an outer circumference thereof centered on the support pin;
• the first rolling element is arranged to make contact with a rolling contact surface of the planetary roller from one side in a radial direction axially below the recessed portion or the projecting portion, and is supported through a bearing to be rotatable relative to the third rolling element;
• the second rolling element is arranged to make contact with the rolling contact surface of the planetary roller from the one side in the radial direction axially above the recessed portion or the projecting portion, and is supported through a bearing to be rotatable relative to the third rolling element;
• and
• the third rolling element is arranged to make contact with the recessed portion or the projecting portion of the planetary roller from an opposite side in the radial direction, and is supported to be capable of moving in the vertical direction relative to the planetary roller support portion.