Garbage truck back door locking mechanism

The utility model relates to a locking mechanism technical field especially relates to a garbage truck back door locking mechanism, and on the mutual articulated railway carriage or compartment in the garbage truck carriage body and back door were applied to to it, this locking mechanism included a driver, two latch hooks and two lockpins, install in the back door lower part at two equal intervals of lockpin, the middle part of two latch hooks all articulates on the wall of railway carriage or compartment side, and the hook part that is equipped with of two latch hook one end do not corresponds the joint with two lockpins, two latch hook other ends are articulated through the regulating part of an adjustable length, and one of them latch hook other end is equipped with the extension arm, the extension arm is used for with driver one end articulatedly, and the driver other end articulates on back door upper portion, is equipped with a stopper on two latch hooks rotate the railway carriage or compartment body o