FIELD: car industry.
SUBSTANCE: invention relates to a stepless transfer box for vehicles. The stepless power transfer box contains a variator, a summing gear and several couplings. Several ranges are transmittable to one another at synchronization points, wherein couplings (C0, C1; B0, B1) are combined into entrance unit (E) that is located in a power flow in front of summing gear (SG1). Summing gear (SG1; SG2) has first (P1) and second (P2) planetary wheels engaging with each other, mounted on common carrier (St1) of planetary wheels. Planetary wheels (P1, P2), first solar wheel (S1) or first gear wheel (H1) with internal engagement are moved from internal combustion engine (VM). Second central wheel (S2; H2) is moved from variator (V), wherein at the transition in the synchronization point from one range to the next one, first solar wheel (S1) or first gear wheel (H1) with internal engagement are alternatively connected to transmit a moment through entrance unit (E) with internal combustion engine (VM), and carrier (St1) is connected to a vehicle drive.
EFFECT: increase in the compactness of the transfer box is achieved.
11 cl, 4 dwg
