| 摘要 |
A tractor transmission comprises an input shaft (19) driving a gearbox input shaft 10 through a three-speed splitter gear (20). The gearbox comprises a main gear which is a top shaft synchronised dual clutch gear with clutches (C1, C2) and selectors (A,B). This gear is followed by a range gear providing direct drive or a step-down ratio or reverse under the selection of selectors (D,E). A PTO drive shaft (16) is driven by way of a clutch (C3) and gears (17). The input drive is from the shaft (10) rather than the shaft (19) so that the splitter gear (20) influences the PTO speed. A given PTO speed can be maintained without increasing engine speed or ground speed by shifting up to overdrive in the splitter gear (20) and shifting down compensatorily in the main gearbox. |
