The utility model relates to the technical field of planetary speed reducers, and discloses a planetary speed
reducer easy to dissipate heat, which comprises a base and a cooling mechanism, the cooling mechanism comprises a cooling
oil tank, the cooling
oil tank is movably connected with an oil outlet
pipe through an
oil filter element, and the oil outlet
pipe is fixedly connected with an oil inlet
pipe through an
oil pump. By means of the arranged cooling mechanism, cooling oil in the cooling
oil tank enters the
oil pump from the oil outlet pipe and then enters the
cooling coil in the
machine body from the oil inlet pipe, heat generated in the planetary
reducer is absorbed, the cooling oil begins to circulate under the action of the
oil pump, and the cooling oil is cooled through the oil return pipe. Cooling oil in the
cooling coil enters the cooling oil tank from the oil return pipe to be cooled again, then impurities in the cooling oil are filtered out through the
oil filter element, finally, the cooling oil flows out of the
oil filter element to start the next circulation, heat generated in the planetary
reducer can be brought out through circulating flowing of the cooling oil, and heat dissipation is conducted on the planetary reducer.