Quick connecting mechanism

The utility model provides a quick connecting mechanism. The lock comprises a connecting piece, a lock body cavity, a pre-tightening lever and a locking piece, the connecting piece comprises a hangingbody and a connecting rod; an upper limiting step is formed at the consolidation part of the upper limiting block and the lower limiting block; a connecting channel and a sliding groove are formed inthe bottom of the lock body cavity. The sliding groove communicates with the connecting channel and extends in the direction of the inner wall of the lock body cavity. The hanging body can pass through the connecting channel; the connecting rod can pass through the sliding groove, and the hanging body cannot pass through the sliding groove; the pre-tightening lever is connected with the lock bodycavity in a rotating mode, one end of the pre-tightening lever is a locking end, the other end of the pre-tightening lever is a pre-tightening end, the end of the pre-tightening end extends to be connected with the upper porti