The invention discloses a railway freight car door opening and closing system and a two-stage locking device of the railway freight car door opening and closing system. The two-stage locking device of the railway freight car door opening and closing system comprises an unlocking arm fixed relative to the ground of an unloading point, and a locking block installed on a freight car; when the freight car load goods and runs and the eccentric distance of a crank of the freight car is reduced, a door opening arm rotates clockwise and is close to the locking block, the locking block abuts against the door opening arm till the eccentric distance is reduced to a preset value, and accordingly clockwise rotation of the locking block is limited; when the freight car enters the unloading point and is ready to unload the goods, the unlocking arm can push the locking block away from the position where clockwise rotation of the door opening arm is limited by moving relative to the freight car. The two-stage locking device has an automatic switching function and can be automatically switched from a locking state to an unlocking state, manual operation is not needed, driving dangers caused by human errors are avoided, time and labor are saved, and manual cost is lowered; automatic switching is achieved through relative moving of the unlocking arm and the locking block when the freight car moves, the structure mode is simple, and operation is convenient and quick.
Railway freight car door opening and closing system and two-stage locking device thereof
2015-05-06
Patent
Elektronische Ressource
Englisch
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