Simple radiator for speed reducer

The utility model belongs to the technical field of speed reducer equipment, and particularly relates to a simple radiator for a speed reducer, which comprises a vent cap, a steel pipe and a housing, the upper end of the steel pipe is sealed, the lower end of the steel pipe is provided with a threaded section, the upper end face of the housing is provided with a screw hole, and the lower end face is provided with an insertion hole; the ventilation cap is in threaded connection with the screw hole; the upper end of the steel pipe penetrates through the inserting hole to be inserted into the housing and divides the steel pipe into an inner section and an outer section, the contact positions of the steel pipe and the inserting hole are fixedly connected through welding, a plurality of exhaust holes are formed in the upper end of the inner section of the steel pipe, and a plurality of backflow holes are formed in the lower end of the inner section of the steel pipe. The cooling device is simple and reasonable in