| 摘要 |
<p>A variable diameter pulley assembly (30) includes a shaft (37) and a pair of pulley sheaves (16, 17) each having a pair of relatively movable guideway disks (32, 33) lying alongside each other. Inner and outer guideway disks (34, 35) of each pair include respectively, first and second series of spiral guideways (32, 33) extending in opposite directions. An integral speed responsive actuator assembly is incorporated into the pulley assembly and includes a housing (44) with two pairs of variable volume fluid chambers (60, 61, 62, 63) and a pair of mirror image speed responsive valves (68, 69) which direct hydraulic fluid under pressure into one or the other of the chambers of each pair to obtain relative movement of a wall separating the chambers, which relative movement can be coupled to the guideway disk sets to change the effective diameter of the pulley assembly (30).</p> |
