Planetary reducer for intermittent high speed of concrete mixer

The utility model discloses a planetary reducer for intermittent high speed of a concrete mixer. Comprising a spline output planet carrier, an oil seal II, a bearing I, a first-stage inner gear ring, a first-stage planet pin shaft, a ventilation plug screw, a pad II, a first-stage planet wheel, a bearing III, a bolt I, an O-shaped ring, an upper box cover, a bearing II, a circlip for a hole, fan blades, a circlip for a shaft, a jackscrew, an input shaft, an oil seal I and an elastic pin, a first-stage inner gear ring fixed spline output planet carrier outputs, the input shaft is meshed with three sets of first-stage planet wheels, and the three sets of first-stage planet wheels are meshed with the first-stage inner gear ring at the same time to form a first-stage NGW type transmission structure. The planetary reducer for intermittent high speed of the concrete mixer can realize intermittent high speed, and is small in size, light in weight, compact in structure, large in bearing capacity, high in transmission