VARIABLE SPEED OPERATION DEVICE FOR AGRICULTURAL POWER MACHINE

摘要

PURPOSE:To facilitate the multistage variable speed switching with a simple constitution, by making the variable speed operation of one and the other speed change gear mechanisms possible by horizontal and vertical slide operations of one change lever. CONSTITUTION:A turning base part 13d of an operation arm having regulating parts 13a and 13b, between which an engaging part 12b where a change lever 12 is engaged with change gears 4a and 4b, and an engaging part 13c for a shifting cam 27 of a change gear 24 is made coincident with the center of a spherical part 12a of the change lever 12 supported on a variable speed case 1 and is supported pivotally on the variable speed case, and the spherical part is engaged with the turning base part so that the change lever can be slided around the axis of the turning base part and in the same plane as the axis. The change lever is turned around the axis to not only engage and disengage the engaging part 12b with and from shifters 14 and 15 but also operate the change gear 24 through the cam 27 by the engaging part 13c; and the change lever is turned in the same plane as the axis to not only operate one of shifters 14 and 15 by the engaging part 12b but also fit regulating parts 13a and 13b to the other shifter while leaving them still, and the rash action of shifters are regulated.