Split type lock ring and rim

The invention discloses a split type lock ring, which comprises at least two arc-shaped lock rings. The arc-shaped lock rings are connected through a connecting plate to form a complete lock ring; notches are formed in the two end parts of the arc-shaped lock ring; the two ends of each connecting plate are movably installed in the notches of the adjacent arc-shaped lock rings respectively. Grooveholes are symmetrically formed in the left side and the right side of the connecting plate, positioning holes and pin holes are formed in the groove holes, pins are inserted into the pin holes and penetrate through the groove holes to enable the connecting plate to slide in the notches in a reciprocating mode, and positioning pieces are inserted into the positioning holes and penetrate through thegroove holes to connect the connecting plate and the arc-shaped lock ring in a limiting mode. The rim comprises a steel ring, a lock ring groove formed in the steel ring and the split type lock ringinstalled in the lock ring