| 摘要 |
1,179,478. Variable-speed epicyclic gear. NISSAN JIDOSHA K.K. 10 March, 1967 [20 June,1966], No. 11389/67. Heading F2D. A split-torque hydromechanical transmission for a vehicle consists of a planetary gear unit 30, 31 mounted parallel to the engine crankshaft 1, one drive path to a shaft 25 being through spur gearing 8, 9, 10 and a torque converter V mounted at one end of the crankshaft, while the second drive path to a shaft 24 is through spur gearing 11, 12, 13 at the other end of the crank-shaft. The arrangement shown for giving two forward speeds and reverse consists of sun-wheels 14, 15 secured to shafts 25, 24, intermeshed planets 16, 17 and a single annulus 17 controlled by a brake 27. A combined clutch and brake unit 22, 23 and 26 is incorporated in shaft 24, and the planet carrier 19 is connected to a spur pinion 20 driving a bevel differential 29 and shafts 33, 34. For forward speeds brake 27 and annulus 17 are released, the brake 26 being engaged and clutch 22, 23 released for low speed, while brake 26 is released and clutch 22, 23 engaged for high speed. For reverse drive brake 27 is engaged to hold annulus 17, and brake 26 and clutch 22, 23 are both released. The number of forward ratios may be increased to four by incorporating a clutch and brake unit in shaft 25, Figs. 7 and 8 (not shown), or the planetary gear unit may consist of a combination of two three-element trains, Figs. 10-14 (not shown). In addition an hydraulic coupling (F) may be included between the crank-shaft 1 and spur gearing 11, 12, 13, Fig. 15 (not shown). Reference has been, directed by the Comptroller to Specification 894,222. |
