Method and Device for Connecting a Wear Part to the Support Thereof on Material Handling Devices on Heavy Construction Machinery

Device for connecting a wear part to a support on materials handling equipment for public works machines, including a tooth for fitting on an adapter, and their linkage with a sleeve made from elastically deformable material and a key, the tooth and the adapter being profiled with openings and zones for accommodating said sleeve and the key, the key being introduced into the sleeve and projecting beyond ends of the sleeve, the key being placed in an axial alignment with regard to the sleeve with a misalignment effect, the sleeve being placed in part of the adapter,

• wherein said key has a key foot and a key head on either side and opposite ends of a body,
• the body is introduced into the sleeve while the key head projects beyond the sleeve,
• the key head is arranged with a part forming an off-centered seat for performing a support and thrust function against a matching shape installed in a first orifice of the tooth,
• the end of the key head is rotatable by operating means,
• the key foot comprises anchoring means to penetrate temporarily into the elastically deformable sleeve by a first tightening action of a predefined value,
• and an end of the key foot is arranged with a conical portion to bear against a second orifice of the tooth as part of a tightening action greater than the first tightening action and resulting from rotation of the key, the rotation of the key causes misalignment of the key with regard to an initial axis and the tight securing of the key, either in the sleeve by anchoring, or against metal parts of the tooth and of the adapter on differentiated support zones.