Belt transmission component

The utility model discloses a belt transmission component which comprises a gear, a shaft is arranged on the gear, a tapered roller bearing is sleeved on the shaft, the tapered roller bearing is attached to the gear, threads are arranged on the shaft, a dustproof cover is sleeved on the shaft, and the dustproof cover is sleeved on the gear. The dustproof cover locks the inner ring of the tapered roller bearing through an anti-skid nut screwed on the thread; and a flange sleeve is sleeved on the tapered roller bearing. The tapered roller bearing is used, so that the belt transmission wheel of the No.8 wheel outlet channel is larger in radial stress and can resist impact load, and the belt transmission wheel can adapt to cigarette packets of different specifications; the friction coefficient is small, so that the bearing is not easy to damage, the shaft is not easy to wear, and belt damage and deflection are reduced; the limit rotating speed is close to that of a deep groove ball bearing, and the inner ring or