Locking mechanism applied to urban rail vehicle emergency evacuation ramp

The utility model discloses a locking mechanism applied to an urban rail vehicle emergency evacuation ramp. A ramp lock comprises a push rod, a lock seat, a limiting shaft, a connecting shaft, a locking plate, a lock pin shaft and an air spring, wherein one side of the lock seat is connected with the tail part of the push rod through a secondary swivel hinge, the other side of the lock seat is fixed on a last-stage pedal of the urban rail vehicle emergency evacuation ramp through bolts, and the limiting shaft is riveted in the push rod; the locking plate is fixed at the front end of the push rod through a bolt, a lock pin shaft clamping groove is formed in the bottom of the locking plate, the lock pin shaft is clamped in the lock pin shaft clamping groove and is fixed on a first-stage pedal of the urban rail vehicle emergency evacuation ramp; one end of the air spring is hinged with the middle of the push rod, the other end of the air spring is hinged with the connecting shaft, and the connecting shaft is fixed on the last-stage pedal of the urban rail vehicle emergency evacuation ramp. According to the locking mechanism, the ramp can be locked reliably, the structure is simple, the use reliability is high, and the application prospect is excellent.