Motor cooling device of electric excavator

The utility model relates to the technical field of motor cooling devices, in particular to a motor cooling device of an electric excavator, which comprises a casing and a motor detachably inserted in an inner cavity of the casing, a heat dissipation box is arranged at the top end of the casing, a plurality of heat dissipation fins are arranged on the circumference of the outer wall of the heat dissipation box, and the heat dissipation fins are arranged in the casing. A heat dissipation cavity is formed in the outer wall of the heat dissipation box, a water inlet pipe is arranged on one side of the outer wall of the heat dissipation box, the water inlet pipe is connected with the heat dissipation cavity and fixedly connected with a first ball valve, and a water outlet pipe is arranged on one side of the outer wall of the heat dissipation box. According to the motor cooling device of the electric excavator, through the arrangement of the fixing assembly, the purpose of fixing the motor in the inner cavity of t