of the body 15 because the projecting part 19 of the collar 18 would come up against the edge 9 translation of the bucket 1 along the axis of the articulated arm 15 is also inhibited by the retaining bar 20 up against which the projecting part 19 of the collar 18 would come the retaining bar 20 also prevents deviation of the bucket 1 with respect to the axis of the tool 17 when using this bucket 1 the tube 7 also inhibits such a deviation and allows the forces exerted in this direction on the retaining bar 20 and on the projecting part 19 of the collar 18 to be reduced when proceeding to remove the bucket 1 the pins are simply unfastened without tooling and the retaining bar 20 is then drawn out released in this way the bucket can be slid along the axis of the tool 17 to extract it from the tube 7 and the socket 6 it emerges from the description that operations for installing and removing the bucket 1 do not require removal of the tool 17 as represented in fig6 and 7 a collar with an oval cross section and two opposed projecting parts can be provided in order to better the forces distribute and to allow safer fixing of a bucket 22 on a rock breaker body 23 the bucket 22 differs from the bucket 1 by the fact that it comprises a horizontal socket 24 which extends in prolongation of the top wall 3 toward the back of the bucket 22 and features an opening 25 more precisely the top face of the socket 24 has a peripheral edge 26 delimiting an.