Patent ID: 8562463

Claim:
A belt type continuously variable transmission, comprising: two pulleys which have two pulley shafts, two working oil supply shafts disposed inside of and coaxial with the two pulley shafts, two movable sheaves, and two fixed sheaves, the two pulleys being arranged in parallel, a driving force being transmitted from a driving source to either of the two pulley shafts, the two movable sheaves sliding on the two pulley shafts in an axial direction respectively, the two fixed sheaves facing the two movable sheaves in the axial direction respectively; a belt which transmits the driving force, transmitted from the driving source to one pulley of the two pulleys, to the other pulley; a positioning hydraulic chamber which presses the movable sheave onto the fixed sheave side; and a communication unit which is configured to permit working oil to be supplied from an outside of the positioning hydraulic chamber to the positioning hydraulic chamber through a supply-side passage and to control permission or prohibition of discharge of the working oil from the positioning hydraulic chamber to the outside, wherein a working oil passage is defined between the working oil supply shaft and the pulley shaft, the communication unit is provided in at least one of the movable sheave and the fixed sheave, and the supply-side passage is in fluid communication with the working oil passage through a communication hole disposed in the pulley shaft.