Coupling structure of motor and speed reducer of mining electric wheel dumper

The invention discloses a coupling structure of a motor and a speed reducer of a mining electric wheel dumper, which is characterized in that sealing structures are respectively arranged on two sides of an axis of a spline connecting structure of a motor output shaft and a speed reducer input shaft of an electric wheel, namely a sealing felt ring and a rotary sealing gasket I are arranged on one side of the motor output shaft; a rotary sealing gasket II is arranged on one side of the input shaft of the speed reducer, so that lubricating oil on the speed reducer side is prevented from entering the motor side through a two-layer sealing structure, and good sealing performance is achieved; through the looseness detection assembly arranged on the radial outer side of the spline connection structure, when connection between the output shaft of the motor and the input shaft of the speed reducer is loosened, the radial outer side wall of the spline connection structure collides with the movable sleeve, and then the