Patent ID: 7958798
Filing Date: 2011-06-14
Classification: F16H,Y10T

Abstract:
1. A speed change system for a working vehicle comprising: a main transmission receiving a prime mover power outputted from a prime mover, and having plural main speed stages, one of which is selected to transmit the prime mover power, wherein the main transmission includes a first clutch for odd-numbered main speed stages and a second clutch for even-numbered main speed stages; a sub transmission disposed on the downstream of the main transmission, and having plural sub speed stages, one of which is selected to transmit a power from the main transmission; and a preliminary transmission disposed on the upstream of the main transmission, including a forward traveling drive train, and having plural preliminary speed stages, one of which is selected to transmit the prime mover power to the main transmission via the forward traveling drive train; and a reverser disposed on the upstream of the main transmission so as to be switchable between a forward traveling stage and a backward traveling stage, wherein: