Novel locking dog device of three-rod type ball lock

The utility model relates to a novel locking dog device of a three-rod type ball lock, comprising a panel, a big locking dog, a small locking dog, two springs, fixing rods, a shifting piece, a braking piece, locking dog barrels, a dog plate mechanism, an upper plate and a lower plate, wherein the dog plate mechanism consists of a dog plate hook and a distance adjusting piece; the dog plate mechanism is arranged between the upper plate and the lower plate; the distance adjusting piece is arranged between the dog plate hook and the upper plate; two sides of the lower plate are respectively provided with folded edges extending towards the direction of the upper plate and being connected with the upper plate; therefore, the distance adjusting piece can move freely in a space formed by the dog plate hook and the upper plate and can not drop out. Compared with the prior art, the novel locking dog device of the three-rod type ball lock has the following advantages: the upper plate and the lower plate adopt a split s