Continuously-variable-ratio belt drive assembly
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United States of America Patent
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-
Nov 12, 2002
Grant Date -
Feb 14, 2002
app pub date -
May 29, 2001
filing date -
May 29, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The drive assembly has: an input member and an intermediate shaft; an axial clutch device for connecting the input member and the intermediate shaft in rotary manner; and a pulley connected in rotary manner to the intermediate shaft and defined by two half-pulleys movable axially with respect to each other and engaging a drive belt, the distance between the half-pulleys determining the winding radius of the belt. A push member, movable axially, along the intermediate shaft, between two limit positions, exerts thrust on the two half-pulleys to determine, in direct relation with its own axial position, the axial distance between the two half-pulleys, and alternatively exerts thrust on the clutch device to release the clutch device when moved axially in the direction increasing the distance between the half-pulleys. A control device is also provided to vary, on command, the axial position of the push member.
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