Toroidal continuously variable transmission for preventing the loosening of a loading nut
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United States of America Patent
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Nov 16, 1999
Grant Date -
N/A
app pub date -
Feb 4, 1998
filing date -
Jul 16, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A toroidal continuously variable transmission comprises a main shaft having a step section. An input disc is drivably supported on the main shaft and axially movable along the axis of the main shaft. An output disc is rotatably supported on the main shaft and located facing the input disc. A power roller is disposed between and in frictional engagement with the input disc and the output disc so as to make transmission of power from the input disc to the output disc. Belleville springs (each having a center opening) are disposed around the main shaft and located at an opposite side of the input disc with respect to the output disc so as to press the input disc toward the output disc. A loading nut is screwed on the main shaft to restrict an expansion amount of the Belleville springs. The loading nut axially faces the step section of the main shaft. A sleeve is disposed between the loading nut and the step section of the main shaft. The sleeve is separable from the loading nut. The Belleville springs are mounted on the sleeve in a manner that the sleeve passes through the central opening of each Belleville spring.
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