Rear door locking device of self-unloading muck truck

The invention discloses a rear door locking device of a self-unloading muck truck and relates to the technical field of special vehicle manufacturing. The rear door locking device comprises a lock hook used for locking a rear door, wherein the rear door is hinged to the upper portion of a compartment, the lock hook is connected with a rigid linear reciprocating mechanism installed at the bottom of the compartment, and the motion direction of the linear reciprocating mechanism is the same as the width direction of the compartment; a lock catch capable of being buckled with or separated from the lock hook is arranged at the bottom of the rear door; a sealing rubber strip in press fit with the rear door is fixed to the tail of the compartment. The problems that an existing rear door locking device of the self-unloading truck loses efficacy easily, and a rear door is not sealed tightly are solved. 本发明公开了种自卸式渣土车后门锁紧装置，涉及特种汽车制造技术领域，包括用于锁紧后门的锁钩，所述后门与车厢上部相铰接，所述锁钩与安装在所述车厢底部的刚性的直线往复运动机构相连接，所述直线往复运动机构的运动方向沿所述车厢的宽度方向设置；所