HYDROMECHANICAL TRANSMISSION Russian patent published in 2007 - IPC F16H3/66 B60K17/08 

FIELD: transport engineering; automatic transmissions.

SUBSTANCE: invention relates to fixed-ratio planetary gear transmissions. Proposed transmission with seven forward speeds and one reverse speed, has case 1, torsional vibration damper 2, input link 3, output link 4 and planetary reduction gear 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. Input link 3 is connected by friction clutch 14 with intercoupled ring gear 10 and sun gear 11. Input link 3 is connected by friction clutch 15 with intercoupled carrier 9 and carrier 12. Sun gear 5 is coupled with input link 3. Input link 3 is coupled with torsional vibration damper 2. Carrier 6 is connected with transmission case 1 by friction brake 10. Friction brake 17 connects intercoupled ring gear 7 and sun gear 8 with transmission case 1. Friction brake 18 connects intercoupled carrier 12 and carrier 9 with transmission case 1. Friction brake 19 connects intercoupled sun gear 11 and ring gear 10 with transmission case 1. Ring gear 13 is coupled with output link 4 of transmission.

EFFECT: enlarged kinematic capabilities of transmission and increased its service life.

1 dwg