Planetary type traction roller transmission.

摘要

In a high ratio planetary transmission which includes in a housing (1, 2) coaxial input and output shafts (3, 4), a first sun roller structure (8) which is part of one (3) of the shafts (3, 4) and disposed within the housing (1, 2), a first traction ring (10) which is disposed within the housing (1, 2) around the first sun roller structure (8) in spaced relationship therefrom, and a number of planetary traction rollers (11) supported in the space between the sun roller structure (8) and the first traction ring (10), each traction roller (11) has two sections (11a, 11b) of different diameters, one (11a) in engagement with the first traction ring (10) and with the sun roller structure (8) and the other section (11b) in engagement with a second traction ring (17) which is operatively connected for rotation with the other (4) of the input and output shafts (3,4) whereby, with a small difference in the diameters of the two traction roller sections, a large transmission ratio can be achieved.