Three-leaves full protection of leakage bucket

The utility model provides a full protection of leakage grab bucket with three sub-leaves, which comprises an upper supporting beam, a lower supporting beam, a bucket leaf, wherein, the upper and the lower ends of a supporting rod are respectively hinged with the upper supporting beam and the bucket leaf by rotating shafts, and the upper end of the power arm of the bucket leaf is hinged with the lower supporting beam through rotating shafts. The utility model is characterized in that the bucket leaf is composed of three bucket sub-leaves, and the top end part of each bucket sub-leaf forms a circular arc shape. The utility model overcomes the defects of the two bucket leaves and the six bucket leaves, and commendably aggregates the advantages thereof; namely, the big grabbing and digging force is maintained, and the leakage protection is realized. The abrasion time is extended, and the service life of the grab bucket is improved; the lubricated conditions of the rotating shafts are improved, the abrasion of the rotating shafts is reduced, and the service life of each rotating shaft and the reliability of the grab bucket are improved.