Sweeper with suspended suction nozzle device

The invention relates to a sweeper with a suspended suction nozzle device. The sweeper comprises a body and the suction nozzle device. The suction nozzle device is arranged below the body. The sweeper also comprises an elevator mechanism, a controller and a distance measuring sensor pointing to the ground, wherein the distance measuring sensor is arranged in front of the driving direction of the suction nozzle device; the suction nozzle device is connected with the body by the elevator mechanism; an output signal of the distance measuring sensor is input into the controller; and the elevator mechanism is controlled by the controller. Compared with the prior art, the sweeper disclosed by the invention adopts the suspended suction nozzle device; the suction nozzle device also has a copying function without rollers, and the height from a suction nozzle to the ground is actively adjusted. As the sweeper has the capacity of actively adapting to pavement changes, the automatic control of the height adjustment of the suction nozzle is realized, the work efficiency is improved, and the requirement that the sweeper continuously work under comparatively complicated road conditions is met.