| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuously variable transmission which can suppress that the necessary hydraulic pressure of a secondary pulley becomes high while suppressing that the thrust of the secondary pulley becomes excessively large.SOLUTION: A canceller 121 is arranged at a side opposite to a piston chamber 68 with respect to a piston 67, and a canceller chamber 125 is formed between the canceller 121 and the piston 67. A communication hole 128 which makes the canceller chamber 125 and its outside communicate with each other is formed at the canceller 121. An oscillatory support part 132 and a weight part 133 which is supported to the support part 132 are arranged in the canceller chamber 125. In a state that a rotation number of the secondary pulley 54 is lower than a prescribed rotation number, the communication hole 128 is opened. In a state that the rotation number of the secondary pulley 54 is not lower than the prescribed rotation number, the weight part 133 is held at a block position which blocks the communication hole 128 by a centrifugal force which acts on the weight part 133.SELECTED DRAWING: Figure 2B |
