Cleaning device for road maintenance vehicle

The utility model relates to the technical field of engineering machinery, in particular to a road maintenance truck cleaning device which comprises a shell and a driving motor arranged vertically downwards, the driving motor is installed at the lower end of a connecting main pipe, a motor shaft of the driving motor is fixedly connected with the top face of the shell, and an annular cleaning brush is fixedly connected to the bottom face of the shell. A telescopic water spraying structure is fixedly arranged on the inner wall of the top face of the shell, a water supply channel is arranged in the lower end of the telescopic water spraying structure, an extending opening for the lower end of the telescopic water spraying structure to extend out of the shell is formed in the bottom face of the shell, and a water inlet is formed in the side wall of the shell. The inner end of the water inlet is fixedly connected with a water inlet hose communicated with the water inlet, and the other end of the water inlet hose i