Belt type stepless transmission and pulley for the same

A pulley of a belt-type stepless transmission, comprising:

• a stationary pulley having a stationary cone surface and a rotating shaft fixed at a central portion thereof;
• a movable pulley being movable in an axial direction of the rotating shaft and having a movable cone surface disposed facing the stationary cone surface in the axial direction;
• and
• a belt held between, while being pressed by, the stationary cone surface and the movable cone surface,
• wherein
• the stationary pulley includes
• a pressing pulley having the stationary cone surface, and
• a support pulley disposed facing the movable cone surface with the pressing pulley therebetween in the axial direction, for supporting the pressing pulley, in which the rotating shaft is fixed at a central portion thereof,
• the support pulley supports an outside peripheral portion of the pressing pulley so as to restrain axial directional displacement of the outside peripheral portion of the pressing pulley,
• a space is formed between the pressing pulley and the support pulley except between the outside peripheral portion of the pressing pulley and an outside peripheral portion of the support pulley, and
• the pressing pulley has an inside peripheral portion capable of moving in the axial direction relative to the rotating shaft and transmitting a torque to any one or more of the rotating shaft and the support pulley;
• and
• a first torque-transmitting mechanism for restraining rotational directional displacement of the inside peripheral portion of the pressing pulley relative to the rotating shaft, while tolerating axial directional displacement of the inside peripheral portion of the pressing pulley relative to the rotating shaft, to transmit a torque between the pressing pulley and the rotating shaft,
• wherein a slidable spline is provided on the inside peripheral portion of the pressing pulley and a spline is provided on the outside peripheral portion of the rotating shaft, the spline of the pressing pulley and the spline of the rotating shaft being engaged with each other in the rotational direction so as to transmit the torque.