RETENTION SYSTEM FOR A WEAR PART FOR A BUCKET FOR AN EARTH MOVING MACHINE

The invention relates to a retention system (100) for a wear part (30) for a bucket (50) for an earth moving machine (200). The retention system (100) comprises in operational use: i) a bucket body (10) comprising a trench (T) having tilted sidewalls (SW1) extending from an upper side (S1) of the bucket body (10); ii) a force multiplier (20) having a shape substantially corresponding to a shape of the trench (T), wherein the force multiplier (20) is provided with a plurality of through-holes (20-1) that are spaced apart and distributed over a first surface (SF1) of the force multiplier (20); iii) a wear part (30) mounted to an edge (E1) of the bucket body (10), wherein the wear part (30) forms a first mutual interface (I1) with the bucket body (10) extending from the edge (E1) over a predefined distance (d1) along the lower side (S2) of the bucket body (10) beyond the location of the trench (T), wherein the wear part (30) forms a second mutual interface (I2) with the edge (E1) of the bucket body (10), wherein the wear part (30) is provided with a plurality of receiving holes (98) having inner threads, wherein the receiving holes (98) are located at locations corresponding to the plurality of through-holes (20-1) in the force multiplier (20), and iv) a plurality of bolts (99) provided in the plurality of through-holes (20-1) and retained by the inner threads of the plurality of receiving holes (98). The wear part (30) and the force multiplier (20) is provided with at least one protrusion (PT1, PT2) at the first mutual inter-face (I1) and another one of the wear part (30) and the force multiplier (20) is provided with at least one matching recess (RC1, RC2) at the first mutual interface (I1) such that relative movement between the wear part (30) and the force multiplier (20) in a lateral direction (LD) parallel to the first mutual interface (I1) is prevented, in operational use, for reducing shear forces acting on the bolts (99).