HYDROTECHNICAL TRANSMISSION Russian patent published in 2007 - IPC F16H3/66 F16H47/08 

FIELD: transport engineering; automatic transmissions.

SUBSTANCE: invention relates to design of fixed-ratio planetary gear transmissions. Proposed transmissions with seven forward speeds and one reverse speed has case 1, hydraulic torque converter 2, input link 3, output link 4 and planetary reduction gear including three planetary gear trains, three friction clutches and three 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 crown gear 10. Third planetary gear train consists of sun gear 11, planet pinion carrier 12 and crown gear 13. Input link 3 is connected by friction clutch 14 with intercoupled sun gear 8 and sun gear 11 and it is coupled also by friction clutch 15 with intercoupled carrier 9 and carrier 12. Sun gear 5 is coupled with input link 3. Carrier 6 is connected with transmission case 1 by friction brake 17. Friction brake 18 connects intercoupled carrier 9 and carrier 12 with transmission case 1. Friction brake 19 connects intercoupled sun gear 8 and sun gear 11 with transmission case 1.

EFFECT: enlarged kinematic capabilities of transmission, increased service life of transmission.

4 cl, 6 dwg