Transmission for power take-off

A system for transmitting power from an engine-driven shaft to a PTO shaft, comprising:

• a variable displacement hydraulic pump driven by the engine-driven shaft;
• a ring gear driven by the engine-driven shaft;
• a planet carrier drivingly coupled to the PTO shaft;
• planet gears rotatably mounted on the planet carrier and in meshing engagement with the ring gear;
• and
• a sun gear in meshing engagement with the planet gears;
• a fixed displacement variable speed hydraulic motor hydraulically driven by the pump and having a motor drive shaft drivingly coupled to the sun gear;
• and
• a one-way clutch coupled to the sun gear, the one-way clutch allowing the sun gear to rotate in only one direction and preventing overspeeding of the PTO shaft.

A system for transmitting power from an engine-driven shaft to a PTO shaft, comprising:

• a variable displacement hydraulic pump driven by the engine-driven shaft;
• a planetary transmission unit comprising a ring gear driven by the engine-driven shaft, a planet carrier drivingly coupled to the PTO shaft, planet gears rotatably mounted on the planet carrier and in meshing engagement with the ring gear, and a sun gear in meshing engagement with the planet gears;
• a fixed displacement variable speed hydraulic motor hydraulically driven by the pump and having a variable speed motor drive shaft drivingly coupled to the sun gear;
• and
• a one-way clutch coupled to the sun gear, the one-way clutch allowing the sun gear to rotate in only one direction and preventing overspeeding of the PTO shaft.