| 摘要 |
1,036,210. Change-speed control; clutches. INTERNATIONAL HARVESTER CO. Dec. 12 1963 [Jan. 16, 1963], No. 49107/63. Headings F2C and F2D. A two-speed tractor drive comprises high and low ratio trains 28, 38 and 30, 40. between shafts 12, 32 and engaged by separate fluidpressure operated disc clutches 46, 58, the latter having an associated one-way clutch 82 arranged in parallel. Drive is normally transmitted through the high ratio train 28, 38, the clutch 46 being engaged by an annular piston 56, and the light duty lock-up clutch 58 released with the one-way clutch 82 overrunning. Low ratio is engaged by releasing clutch 46 and engaging clutch 58 by a second piston 66, the clutch initially acting as a brake to decelerate pinion 30 and idler shaft 26, and engage clutch 82, drive from shaft 12 then passing through the clutch housing member 16, clutch 82, shaft 26 and gear train 30, 40. After initial engagement of lock-up clutch 58, the latter engages in parallel with clutch 82 and the timing of fluid-pressure application to clutch 58 in relation to release of main clutch 46 is not critical. |
