Speed reducer and motor integrated oil cooling system structure

The invention relates to an oil cooling system structure integrating a speed reducer and a motor, the oil cooling system structure comprises a rear end cover (1), a junction box cover (2), a stator assembly (3), a rotor assembly (4) and a front end cover (5), the stator assembly (3) is assembled between the front end cover (5) and the rear end cover (1), the rotor assembly (4) is assembled inside the stator assembly (3), and the junction box cover (2) is arranged on the front end cover (5). The junction box cover (2) is assembled on the outer side of the rear end cover (1), the axis of the front end cover (5) is provided with a speed reducer internal structure (8), the outer side of the speed reducer internal structure (8) is provided with a speed reducer shell (7), the speed reducer shell (7) is provided with a speed reducer shaft (6), and the speed reducer shaft (6) is coaxial with a rotating shaft (401) of the rotor assembly (4); and an oil pump and a filter are arranged on a casing (301) of the stator ass