Guide rail locking device for railway vehicle door system

The utility model discloses a guide rail locking device for a railway vehicle door system, which comprises a screw rod, a nut pin component, a guide rail, a transmission connecting frame and a positioning seat, and the screw rod is mounted on a preset door system bearing driving mechanism base; the nut pin assembly comprises a nut connected to the lead screw in a threaded mode, a nut sleeve is arranged on the nut, a rolling pin is fixedly installed on the nut sleeve, and the rolling pin is installed in the guide rail. A guide rail locking device for a railway vehicle door system adopts a guide rail and a nut pin assembly, simplifies the structure of the locking system, is simple in structure, low in manufacturing cost, convenient to install and adjust, high in reliability and safety, and capable of achieving a locking function of a locking mechanism when a door leaf is stressed after the door system is locked. Locking safety of a door system of the vehicle under the impact vibration operation environment is k