Patent ID: 6397693
Filing Date: 2002-06-04
Classification: F16H,Y10T

Abstract:
A change speed apparatus for a tractor comprising:a main change speed device having a combination of gear trains mounted on a first shaft and a second shaft extending parallel to each other, for driving a change speed output shaft at a plurality of speeds; and a backward and forward drive switching device cooperable with said main change speed device to produce forward drive and backward drive in an equal number of speeds; wherein, between said main change speed device and said backward and forward drive switching device, said forward drive is transmitted through said first shaft and said backward drive is transmitted through said second shaft, wherein said backward and forward drive switching device and said main change speed device are disposed in a transmission case, said backward and forward drive switching device is pre-assembled in a gear case fixable to said transmission case; and wherein said transmission case is divided by a partition into a clutch chamber for housing a main clutch for connecting and disconnecting power from an engine, and a transmission chamber for housing said main change speed device, said gear case being disposed in said clutch chamber, said main clutch being operable by a release fork disposed between said main clutch and said gear case, said release fork being curved to bulge toward said main clutch.