Machine element or mechanism – Mechanical movements – Grip units and features
Patent
1990-08-24
1992-01-28
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Grip units and features
74200, 74559, F16H 1500, G05G 100
Patent
active
050834738
ABSTRACT:
A toroidal continuously variable transmission comprises a friction roller disposed between co-axial input and output discs and in driving contact therewith, and a roller carrier rotatably supporting the friction roller. A hydraulic actuator is operative to shift the roller carrier along a carrier axis. The hydraulic actuator is operable on hydraulic pressure supplied thereto by a ratio control valve. The ratio control valve includes a valve sleeve (i.e., a first member) moveable along a valve axis, and a spool (i.e., a second member) received in the valve sleeve and moveable along the valve axis, and a ratio control valve for regulating supply of hydraulic fluid to and discharge thereof from the hydraulic actuator in response to relative movement of the spool to the sleeve. A control arrangement includes a stepper motor for changing the sleeve from an initial position to a desired position. A cam is connected to the roller carrier for unitary motion about the carrier axis. A cam follower operatively disposed between the cam and one end of the spool. An adjustor is provided between the cam follower and the one end of the spool for adjusting relation between the rotary motion of the cam and the corresponding linear motion of the spool.
REFERENCES:
patent: 4253434 (1981-03-01), Takizawa et al.
patent: 4960004 (1990-10-01), Hibi et al.
Herrmann Allan D.
Laub David W.
Nissan Motor Co,. Ltd.
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