CONTINUOUSLY VARIABLE TRANSMISSION

摘要

A hydraulic and mechanical composite transmission (40), wherein a mechanical speed change mechanism (30) having a differential part (7) comprising a group of planetary gears and a hydraulic continuously variable transmission mechanism (21) are provided between a speed change input part receiving a power from a prime mover and speed change output parts (27, 28), the rotation of the speed change input part is input to a pump shaft (25a) of the hydraulic continuously variable transmission mechanism (21) and the first differential input part (25b) of the differential part, a second differential input part to which the rotation of the motor shaft (26) of the hydraulic continuously variable transmission mechanism (21) is input is provided further on the differential part (7) so that the rotation of the group of planetary gears produced by a difference in rotation between two differential input parts at the differential part (7) can be transmitted to the speed change output part (27), the speed change input part being formed at one end of the pump shaft (25a), the first differential input part (25b) being formed at the other end, and a shaft as the first differential input part (25b) being extended and connected to a PTO shaft (42).