FRICTION ROLLER TYPE DECELERATION DEVICE AND DRIVE DEVICE FOR ELECTRIC AUTOMOBILE

摘要

Construction of a friction roller reducer is achieved wherein displacement of intermediate rollers 19 due to the change in thickness in the axial direction of loading cam apparatuses 7a can be performed smoothly, and excellent transmission efficiency can be obtained. Long guide holes 35 that are long in the radial direction of a sun roller 4a and ring-shaped roller 5a are provided in guide blocks 34 that are fastened to a support frame for supporting the end sections of rotation shafts 20 of intermediate rollers 19. The outer rings of ball bearings 36, of which the inner rings are fitted around and fastened to the outside of the end sections of the rotation shafts 20, engage with the long guide holes 35 so as to be able to displace in the radial direction of the sun roller 4a and the ring-shaped roller 5a.