| 摘要 |
FIELD: transport.SUBSTANCE: invention relates to planetary transmission control devices. Transmission control device contains compound planetary gear, stepped variable reduction gearbox and oil pump as pressure source. The compound planetary gear contains friction brake controlled by cylinder and friction clutch for locking planetary gear with cylinder. Planetary reduction gear has friction clutch also controlled by cylinder, and friction brakes provided with cylinders. To perform controlled switching on and off of friction brake and friction clutch of compound planetary gear a pressure accumulator, a pressure release valve, oil dumping valve and switching on forcing valve connected with hydraulic control valve group are provided. The compound planetary gear and reduction gearbox are fitted with two pressure accumulators connected by jets with pressure source. The pressure accumulators are able to be connected by solenoid valves with cylinders of friction clutches and brakes.EFFECT: providing gear shifting without interruption of power flow and prevention of slippage in switched off friction couplings.3 cl, 8 dwg |
