Transmission structure

Abstract

[Problem] To provide a transmission structure that includes a main transmission unit performing continuous speed changing and an auxiliary transmission unit performing multi-stage gear shifting and that can prevent a shock at the time of switching a gear stage of the auxiliary transmission unit during travel as much as possible. [Solution] In the present invention, the controller is configured as follows. When a gear stage switching manipulation is performed by an auxiliary speed change manipulation member during the travel, the controller disengages a pre-switching engagement clutch mechanism in the auxiliary transmission unit to realize an idle running state, operates a speed change output device during the idle running state by setting, as a target, a vehicle speed that corresponds to an actual vehicle speed in a case where an engagement state of a post-switching engagement clutch mechanism is set as a reference, thereafter engages the post-switching engagement clutch mechanism, and controls the operation of the speed change output device by setting, as a target vehicle speed, a vehicle speed that is defined by a manipulation position of a main speed change manipulation member.