Pressing device for toroidal continuously variable transmission

A pressing device for a toroidal continuously variable transmission, comprising:

• a cam plate having a first cam surface that is uneven in a circumferential direction on one side in an axial direction;
• a disk having a toroidal curved surface with arc-shaped cross section on one side in the axial direction, and a second cam surface that is uneven in the circumferential direction on the other side in the axial direction and faces the first cam surface;
• a retainer arranged between the first cam surface and the second cam surface and having rectangular shaped pockets arranged at a plurality of locations in the circumferential direction so that a center axis of the respective pockets is arranged in a radial direction;
• and
• a plurality of rollers rotatably held inside the pockets with two or more rollers of the plurality of rollers arranged in a row in the radial direction of the retainer inside the respective pockets;
• wherein
• an intermediate sliding member provided separately from the respective rollers is arranged coaxially with the center axis of the respective rollers in at least one location of a portion between an end surface on an outside in the radial direction of the retainer of one roller of the two or more rollers arranged in the respective pockets that is located on an outermost side in the radial direction of the retainer and an inside surface of the respective pockets on the outside in the radial direction of the retainer, and a portion between an end surface on the outside in the radial direction of the retainer of one roller of adjoining rollers in the radial direction of the retainer of the two or more rollers and an end surface on an inside in the radial direction of the retainer of the other roller of the adjoining rollers;
• sliding contact occurs between the intermediate sliding member and the inside surface of the respective pockets on the outside in the radial direction of the retainer, between the intermediate sliding member and the end surface on the outside in the radial direction of the retainer of the one roller located on the outermost side or the one roller of the adjoining rollers, between the intermediate sliding member and an end surface on the inside in the radial direction of the other roller, or a separate intermediate sliding member that is attached to each of the above surfaces;
• and
• a contact area of a sliding contact portion between the intermediate sliding member and the above surfaces or the separate intermediate sliding member is smaller than a contact area of a sliding contact portion in a case where the intermediate sliding member is not provided and there is direct sliding contact between the end surface on the outside in the radial direction of the retainer of the one roller located on the outermost side and the inside surface on the outside in the radial direction of the retainer of the respective pockets, or between the end surface on the outside in the radial direction of the retainer of the one roller of the adjacent rollers and the end surface on the inside in the radial direction of the retainer of the other roller.