HYDROMECHANICAL TRANSMISSION FOR TRACK MACHINE Russian patent published in 2013 - IPC F16H41/00 F16H47/06 B61C9/00 

FIELD: machine building.

SUBSTANCE: hydromechanical transmission includes a mechanical part, a hydraulic part, and a power and control system. Hydraulic part includes a hydraulic transformer with a turbine shaft, pump and turbine wheels, which is located after the inlet shaft. Mechanical part of hydromechanical transmission is equipped with a transmission gear located after the hydraulic transformer. The transmission gear is equipped with a reverse switching coupling. A turbine shaft of the transmission gear is rigidly attached to the turbine wheel of the hydraulic transformer. Mechanical part of hydromechanical transmission is also equipped with power takeoff shafts. The power and control system is provided in its turn with automatic control units and a pump for feeding of the hydraulic transformer and the transmission gear. Besides, hydromechanical transmission is equipped with a three-stage transmission gear. The latter includes the first friction shaft with a multidisc friction coupling of the first stage, which is installed on it, and the second friction shaft with two multidisc friction couplings of the second and the third stages respectively, which are installed on it. Gears are rigidly put on the turbine shaft of the transmission gear and transfer torque moment to friction shafts. Hydraulic transformer is provided with an interlocking friction coupling installed between pump and turbine wheels.

EFFECT: improving operating efficiency of hydromechanical transmission.

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