Patent ID: 6443868
Filing Date: 2002-09-03
Classification: F16H,H02K

Abstract:
A frictional transmission apparatus comprising a simple planetary roller mechanism and a brake mechanism, said simple planetary roller mechanism having friction rollers including a sun roller, a planetary roller, and a ring roller, said planetary roller being retained by a carrier and making rolling contact with the outer periphery of said sun roller and with the inner periphery of said ring roller, said brake mechanism being coupled to said sun roller to brake rotation of said sun roller, whereinstatic friction torque Y obtainable from said brake mechanism is set to fall within the range of 0.1Xd0.7Xd, â€ƒwhere Xd is critical test torque, a value of test torque at which any of said friction rollers starts to make sliding rotation when said test torque is input in gradually increasing values to said sun roller with said carrier and said ring roller fixed stationary.