Endless belt power transmission systems or components – Pulley with expansible rim means or pulleys with alternately... – Structure for variably adjusting radius of rim section
Patent
1989-06-13
1990-07-03
Bui, Thuy M.
Endless belt power transmission systems or components
Pulley with expansible rim means or pulleys with alternately...
Structure for variably adjusting radius of rim section
474 56, F16H 1102
Patent
active
049387324
ABSTRACT:
A continuously variable transmission having a variable diameter pulley assembly. The variable diameter pulley assembly has an array of belt engaging elements arranged in a circular pattern having a diameter variable as a function of the relative rotational orientation of supporting inner disk members and outer disk members. A hub connected to the outer disk members has a plurality of helical slots concentric with the axis of rotation. A concentric disk drive member has a plurality of helical slots which rotate in the opposite direction of the helical slots in the hub. Each helical slot in the disk drive member crosses one of the helical slots in the hub to form a plurality of through apertures. An actuator pin disposed in each through aperture locks the disk member to the hub for rotation. An axially displaceable pin cage displaces the actuator pins along the axis of rotation. The axial displacement of the actuator pins in the crossing helical slots rotates the disk drive member and the inner disk members relative to the hub and the outer disk members radially displacing the belt engaging members. An alternate embodiment has crossing helical grooves in place of the crossing helical slots and a ball received in the intersection of the crossing helical grooves.
REFERENCES:
patent: 4295836 (1981-10-01), Kumm
patent: 4714452 (1987-12-01), Kumm et al.
patent: 4768996 (1988-09-01), Kumm
patent: 4824419 (1989-04-01), Kumm
Bui Thuy M.
GKN Automotive Inc.
VanOphem Remy J.
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