Three-wheel set structure for tire road roller

The invention discloses a three-wheel set structure for a tire road roller. A first rim is mounted at the first output end of a speed reducer, a second rim and a transmission shaft are mounted at thesecond output end of the speed reducer, and a third rim is mounted on the transmission shaft; the two output ends of the speed reducer mutually communicate through an air way channel which is connected with a valve core of a first tire through a first sealing rubber pipe; an air pipe and an air pipe connector are contained in the transmission shaft; one end of the air pipe is connected with a rotary sealing connector, and the other end of the air pipe communicates with the air way channel; the air pipe connector sleeves the air pipe and communicates with a through hole in the air pipe; an outlet hole in the side face of the transmission shaft is connected with a valve core of a second tire through a second sealing rubber pipe; and the rotary sealing connector is connected with a valve coreof a third tire through a