PLANETARY COMPOSITE TRANSMISSION FOR VEHICLE Russian patent published in 2010 - IPC F16H3/44 

FIELD: transportation.

SUBSTANCE: invention refers to ground transport equipment and specifically to transmissions for high-speed track-laying machines. Vehicle planetary composite transmission is formed by two planetary transmissions connected in series: range and main. Range transmission (A) consists of two planetary gears with K₁ and K₂ kinematic characteristics, two friction brakes (10, 11), one lock-up clutch (12) and provides three operation ranges: reverse, low forward gears and high forward gears. Main planetary transmission (B) consists of two planetary gears with K₃ and K₄ kinematic characteristics, two friction brakes (22, 23), two lock-up clutches (24, 25) and provides four gears of one direction (without reverse). Kinematic characteristics of planetary gears of range and main transmissions are connected by relation K₁≅((1+K₄)/K₄)⁴≅(1+K₃)². Range splitting of vehicle planetary composite transmission is made by law of geometric progression. Finally, twelve gears are obtained from which eight gears are forward and four gears are reverse with full control of transmission.

EFFECT: invention allows providing increase of integral traction power of vehicle, improvement of its acceleration characteristics, improvement of its effectiveness and vehicle rotation in place.

2 tbl, 1 dwg