The present invention discloses a two-level locking device, a hopper car bottom door and a hopper car. The device includes a first transmission shaft, a second transmission shaft, a clutch, a pressure mechanism and a reset mechanism, wherein under the pressure action of the pressure mechanism, the clutch separates the first transmission shaft from the second transmission shaft, and under the action of the reset mechanism, the clutch joints the first transmission shaft with the second transmission shaft. The bottom door includes the device. The hopper car includes the bottom door. By adopting the device, when the clutch is accidently separated by the pressure action of the pressure mechanism, the reset mechanism can re-joint the clutch to prevent the accidental rotation of the first transmission shaft and the second transmission shaft. By adopting the bottom door, the hopper car bottom door opened and closed by a planar four-bar linkage passing a dead point is more reliable to use. The hopper car is more reliable to use.


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    Title :

    Two-Level Locking Device, Hopper Car Bottom Door and Hopper Car


    Contributors:
    SHI CHUNJIANG (author) / SUN MINGDAO (author) / JIANG QIANGJUN (author) / LIU FENGWEI (author) / WANG BAOLEI (author) / LIU WENLIANG (author) / TANG CHUQIANG (author) / JIANG RUIJIN (author) / LIN LIANGCAI (author) / FU TIEJUN (author)

    Publication date :

    2015-12-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES



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