Automatic battery replacing device of electric heavy truck

The invention discloses an automatic battery replacing device of an electric heavy truck. The automatic battery replacing device comprises a battery pumping mechanism, a left-right translation mechanism and a posture adjusting and aligning mechanism. A battery grabbing hook traction mechanism composed of a lock hook mechanism, a guide rail slide way and the like is arranged in the middle of the battery pumping mechanism, a grabbing hook grabs a battery to load and unload the battery, and a left-right translation mechanism is used for replacing the position of a battery compartment. Before the battery is replaced and in the battery replacement process, the device is aligned with the heavy truck. The parallel laser emitter installed in the battery jar of the electric heavy truck emits laser and modulates the laser, the laser spot position sensor demodulates the received laser, the single-chip microcomputer controls the servo electric cylinder to adjust the position according to a signal detected by the laser sp