Oil filler cap assembly and opening and locking method thereof

The invention discloses an oil filler cap assembly structure. A lock column (2) extending inwards is arranged on an inner plate of an oil filler cap; the end part of the lock column is spherical, andthe outer diameter is greater than the diameter of the lock column body; an oil filler cap locking motor is arranged on an automobile body on the side face of the lock column, a threaded column is arranged on a shaft of the oil filler cap locking motor, a screw hole sliding block spirally matching the threaded column is arranged on the threaded column, and a locking pin is arranged in front of thescrew hole sliding block facing the lock column. The invention further discloses an opening and locking method of the oil filler cap assembly structure. By the adoption of the technical scheme, the function of opening and closing the oil filler cap is achieved, the problems that in the prior art, when the oil filler cap is opened, a handle pull wire is poor in return, difficult to lock and the like are solved, and the oil