Dustproof protection structure for heavy rim

The utility model relates to the technical field of rims, and discloses a dustproof protection structure for a heavy rim, which comprises a rim, a spoke is fixedly connected to an inner ring of the rim, a hub is fixedly connected to one side of the spoke far away from the rim, a dustproof mechanism is arranged on the front side of the inner ring of the rim, and the inner ring of the rim is provided with a dustproof cover. A positioning mechanism is arranged on the rear side of the dustproof mechanism, the dustproof mechanism comprises a convex ring, the convex ring is fixedly connected to the front side of the inner ring of the rim, a threaded rod is fixedly connected to the front side of the convex ring, the outer ring of the threaded rod is sleeved with a fixing ring, and the outer ring of the threaded rod is in threaded connection with a threaded cover on the front side of the fixing ring. Through the arranged dustproof mechanism, external air is firstly in contact with the dustproof filter element before