| 摘要 |
1,197,017. Variable-speed epicyclic gear; valves. FORD MOTOR CO. Ltd. 4 July, 1968 [5 July, 1967], No. 31876/68. Headings F2D and F2V. In an automotive vehicle power transmission between an I.C. engine and output shafts 26, 46 of a bevel differential gear 36, clutch and brake controlled sun-ring planetary trains 146, 102 providing a plurality of power paths between a gear input sprocket wheel 10 and the differential carrier 34 coaxial therewith are substantially enclosed in a casing 16 secured to a stationary sleeve 24 which rotatably supports, thereon and therein respectively, the sprocket wheel 10 and one of said output shafts, viz. 26, and takes the torque reaction of said planetary trains. General arrangement.-The sprocket wheel 10 is driven from the engine through an hydrodynamic torque converter and a chain 14. The sleeve 24 is bolted to a chain and sprocket cover 20 which in turn is bolted at 18 to the casing 16. The output shaft 26 is journalled within the sleeve 24 by bushes 28, 30, and within the output shaft 46 by bushes 62, 64; and the output shaft 46 is in turn journalled within the casing 16 so that the end of the sleeve remote from the wheel 10 is supported in the casing via the output shafts 26, 46. A needle bearing 156 and an auxiliary bearing bushing 158 support the wheel 10 on the sleeve 24. The output shafts 26, 46 drive axle shafts through universal joints 230, 98. The differential carrier 34 drives a governor valve rotary body 68 housing centrifugal valve elements 78, 80 respectively controlling small and large orifices 86, 88 between a feed passage 82 and exhaust. A control valve system 94 uses the back pressure in the feed passage 82 as an indicator of vehicle speed. In a low sped range, the most sensitive, the valve element 78 alone is operative whilst in a high speed range both elements 78, 80 are operative. The body 68 may also drive a speedometer gear 90. Gear arrangement.-The train 146 comprises a ring 148 fast with the wheel 10, a carrier 144, and a sun 152 fast with a drum 162. The train 102 comprises a carrier 110 fast with the differential carrier 34, a ring 104 fast with the carrier 144 of the train 146, and a sun 106 fast with a member 138. A one-way detent 224 has an outer race 228 fast with the drum 162 and an inner race 226 fast with a drum 174, the latter being journalled on the sleeve 24 by bushes 176, 178. A one-way detent 208 has an outer race 206 and an inner race 210 fast with the sleeve 24. Fluid-pressure actuated multidisc friction clutches and brakes 172, 186, 140, 222, 122 are respectively arranged between the carrier 144 and the drum 162, the drums 162, 174, the drum 174 and the outer race 206, the drum 174 and the inner race 210, and the ring 104 and the casing 16. Operation.-Low Foward is by engaging 140 for reduced-reduced through both trains 146, 102, the sun 106 reacting through the detent 208 and the sun 152 through the detent 224 and the stationed drum 174. Intermediate Forward is by additionally engaging 172 to lock up the train 146 for direct-reduced, the detent 224 releasing. High (1/1) is by additionally engaging 186 to lock up both trains, the detent 208 releasing. Reverse is by engaging 186 and 122 to station the carrier 144 and the ring 104 for reversed-reduced. Hill-braking two-way Intermediate Forward is by engagement of 222 to bridge the detent 208, and two-way Low Forward is by additional engagement of 186 to additionally bridge the detent 224. |
