Double-turbine gearbox of reel-type sprinkler

The utility model discloses a double-turbine gearbox of a reel-type sprinkler. The double-turbine gearbox comprises a box body (1), a worm input shaft (2), a primary worm gear (3), a worm transmission shaft (4), a secondary worm gear (5), a primary gear (6), a trinary transmission shaft (7), a secondary gear (8), a copper sleeve (9), an output shaft (10) and a clutch mechanism (11), wherein the worm input shaft rotates to drive the primary worm gear to drive the worm transmission shaft to rotate; the worm transmission shaft drives the secondary worm gear to rotate; the secondary worm gear drives the trinary transmission shaft and the primary gear to rotate; the primary gear drives the secondary gear together with the copper sleeve to idle on a polished shaft section of the output shaft; when the clutch mechanism is merged with the secondary gear, the secondary gear drives the output shaft to rotate to output torque. The double-turbine gearbox of the reel-type sprinkler can achieve a relatively large gear ratio at the relatively small number of transmission levels, further ensures relatively high transmission efficiency at a relatively small volume, and is convenient to mount.