BOTTOM DOOR OPENING/CLOSING MECHANISM, BOTTOM DOOR APPARATUS AND BOTTOM-OPEN DOOR HOPPER VEHICLE

摘要

A bottom door opening/closing mechanism comprises a first connecting rod, a second connecting rod, an oscillating rod, a bottom door opening/closing driving cylinder and a transmission shaft. The oscillating rod is separately hinged to the second connecting rod and a piston rod of the bottom door opening/closing driving cylinder, one end of the first connecting rod is hinged to the second connecting rod, the transmission shaft is connected to the second connecting rod, the cylinder body of the bottom door opening/closing driving cylinder is fixedly connected with a first latch hook, and the oscillating rod is fixedly connected with a second latch hook capable of being hooked with the first latch hook. Further provided are a bottom door apparatus and a bottom-open door hopper vehicle. In the present invention, the first latch hook is adopted to be hooked with the second latch hook to implement secondary locking, so advantages such as a simple structure and low manufacturing and maintenance expenses are provided. Moreover, secondary locking can be completed at the same time of closing the bottom door only in need of controlling the bottom door opening/closing driving cylinder, thereby reducing the complexity of a control system.