TRANSMISSION Russian patent published in 2007 - IPC F16H3/66 B60K17/10 

FIELD: transport engineering.

SUBSTANCE: invention relates to fixed-ratio planetary transmission. Proposed automatic hydromechanical transmission with forward speeds and one reverse speed contains case 1, torsional vibration damper 2, input link 3, output link 4 and planetary reduction unit including three planetary gear trains, two friction clutches and four friction brakes. First planetary gear train consists of sun gear 5, planet pinion carrier 6 and ring gear 7. Second planetary gear train consists of sun gear 8, planet pinion carrier 9 and ring gear 10. Third planetary gear train consists of sun gear 11, planet pinion carrier 12 and ring gear 13. Friction clutch 14 connects input link 3 with ring gear 7 and carrier 9. Friction clutch 15 connects input link 3 with ring gear 10 and sun gear 5. Carrier 12 is coupled with input link 3 coupled with torsional vibration damper 2. Friction brake 16 connects ring gear 10 and sun gear 5 with transmission case 1. Friction brake 17 connects ring gear 7 and carrier 9 with transmission case 1. Friction brake 18 connects sun gear 11 and sun gear 8 with transmission case 1. Ring gear 13 is coupled with transmission case 1 by friction brake 19. Carrier 6 of first planetary gear train is coupled with output link 4 of transmission which in its turn is coupled through intermediate shaft 26 with differential 27. Friction disks of friction brakes 16,17,18,19 are pressed together by pistons 21,23,24,25 respectively. Friction disks of friction clutches 14,15 are pressed together by pistons 22,20.

EFFECT: enlarged kinematic capabilities of transmission, increased service life of transmission and improved dynamic characteristics of vehicles.

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