INFINITELY VARIABLE SPEED TRANSMISSION

摘要

Disclosed is an infinitely variable speed transmission, including: a first speed changing mechanism (10) for primarily changing power from an engine (E) into a necessary speed ratio, including: a sun gear (18) disposed on an input shaft (12) for transmitting power generated from the engine (E); a plurality of planet rollers (20) which are disposed around the sun gear (18) at a predetermined distance from each other, each planet roller (20) having a truncated cone-shape and being revolvable around the sun gear (18) and rotatable about its axis (22): a carrier (26, 28) for connecting the planet rollers with each other, a movable ring (24) disposed to be circumscribed on outer tangential line of the planet rollers (20) and movable by a moving member (34) along a longitudinal direction of the planet rollers (20) to change a rotational speed of the planet rollers (20) by varying an operating diameter so that an output speed outputted through the carriers (26, 28) connecting the planet roller with each other can be varied; and a second speed changing mechanism for finally changing the output speed from the first speed changing mechanism (10) as a necessary final output speed, including: low and high speed control member (46, C1, C2) which are selectively connected with the first speed changing mechanism.