Disclosed are a link type secondary locking device, a hopper car bottom door and a hopper car, relating to the technical field of railway wagons. The link type secondary locking device comprises a transmission shaft, a door opening arm, a first roller, a second roller, a first locating pin, an anti-rotation disc and a link mechanism. The hopper car bottom door comprises the link type secondary locking device. The hopper car comprises the bottom door. Even when the link type secondary locking device is accidentally under a force, the link mechanism cannot rotate and then a driven arm likewise cannot rotate. The hopper car bottom door can avoid accidental opening of the hopper car bottom door. The hopper car is more reliable in use.
Link type secondary locking device, hopper car bottom door and hopper car
2016-12-22
Patent
Electronic Resource
English
IPC: | B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES |
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