| 摘要 |
1497337 Change-speed gear and control FORD MOTOR CO Ltd 17 Oct 1975 [16 Dec 1974] 42654/75 Heading F2D A transmission for a vehicle having a transversely mounted engine comprises an input shaft 10 driven through a clutch 12 and integrally carrying wheels 28 ... 36 meshing freely-mounted wheels 62 ... 68, synchronously clutchable to a parallel output shaft 48, having an integral output pinion 56 meshing a ring gear 58 secured to the cage of a differential gear, the side gears 120, 122 of which are directly engaged internally by tripot universal joint spiders (Fig. 13, not shown), carried by axle shafts, the selector mechanism being as follows. Transverse to the gear shafts 10, 48 is a slide-turn selector shaft 142, Fig. 4, which applies corresponding shift movements to a shift rail 174, arranged parallel to the gear shafts, through two fixedly pivoted bellcranks, one, 160, 168, transmitting axial to axial movement, the other 180, pivoted at right angles to 160, transmitting turn-to-turn movement, Fig. 5 and Fig. 6, not shown. Freely mounted on the shift rail 174 are the hubs of three shift forks, one, 206, Fig. 8, for the 1-2 clutch 70, another, 210, for the 3-4 clutch 96, and a third, 198, for sliding a reverse idler into mesh with an input-mounted wheel 30 and the toothed exterior of the 1-2 clutch 70. The fork hubs 198, 206, 210 have axial extensions 220, 228, 230, Figs. 8 and 9, aligned in neutral, and selectively engaged by a selector finger 224 on the shift rail 174 when the latter is turned to select, the selected fork hub being subsequently shifted axially in the desired direction by axial movement of the shift rail 174. Turning with the shift rail 174, but prevented from axial movement by fixed walls 236, is an interlock plate 232 which is slotted to permit passage of the selector finger 224 with a selected fork hub, but restrains in neutral the remaining two fork hubs not selected. A spring-loaded plunger 240 obstructs a cam surface 238 on the interlock plate 232 to resist movement towards the reverse fork hub 220, and a spring detent 250, Fig. 4, locates the three gear and neutral positions of the shift rail 174. |
