HYDROMECHANICAL TRANSMISSION OF TRACTION-TRANSPORT CRAWLER VEHICLE Russian patent published in 2007 - IPC B60K17/10 

FIELD: transport engineering hydromechanical transmissions.

SUBSTANCE: proposed transmission has case 1, drive shaft 2 connected with engine 3, output shaft 22 connected with track assembly 5, two differential mechanisms 6 and 7 with epicyclic gears 8 and 9, carriers 10 and 11 and sun gears 12 and 13. Brake 14 is installed between case 1 and epicyclic gear 8 of differential mechanism 6. Clutch 15 with gear train 16 is installed between drive shaft 2 and epicyclic gear 8. carrier of differential mechanism 6 is coupled with sun gear 13 of differential mechanism 7 whose carrier 11 is coupled with intermediate shaft 4. Epicyclic gear 9 of differential mechanism 7 is provided with toothed clutch 17 which engages epicyclic gear 9 with case 1 in first position, and epicyclic gear 9 with drive shaft 2 through gear train 18 in second position. Transmission contains also reverse reduction gear 23 including right-hand and left-hand incomplete planetary trains, without epicyclic gears, consisting of carrier 26 coupled with case 1 through brake friction clutch 27 and by intermediate shaft 4 through lock friction clutch 28, sun gear 24 of left-hand planetary gear train of reverse reduction gear 23 coupled with intermediate shaft 4 of sun gear 25 of right-hand planetary gear train of reverse reduction gear coupled with output shaft 22 and six planet pinions 29 (three per each planetary gear train) in meshing with each other, and also right-hand sun gear 25 and left-hand sun gear 24.

EFFECT: enlarged operating capabilities of hydromechanical transmission.

1 dwg