Assembly for securing a wear

Abstract

A wear member for excavating equipment and which is particularly suited for a dredge cutterhead that includes a curved abutting surface that abuts a complementary curved bearing surface on the base. The curved bearing surfaces are able to maintain substantially full contact with each other under transverse loading. The base and adapter further having a plurality of complementary stops for resisting relative movement between them.

1 . A wear member for mounting on a base fixed to excavating equipment, the wear member comprising:
 a front end;   a curved abutting surface for abutting a front bearing surface of the base;   a rearwardly extending leg including an axial slot to receive a tongue of the base;   an opening for receiving a lock to releasably secure the wear member to the base; and   a stop extending generally transverse to the abutting surface and subdividing the abutting surface into a plurality of sections, the stop abutting a complementary stop on the base to resist movement of the wear member on the base under certain loading conditions.   
   
   
       2 . A wear member in accordance with  claim 1  wherein the abutting surface is curved about two perpendicular axes. 
   
   
       3 . A wear member in accordance with  claim 2  wherein a first section of the abutting surface is concentric to a second section of the abutting surface. 
   
   
       4 . A wear member in accordance with  claim 1  wherein the abutting surface generally conforms to a spherical segment. 
   
   
       5 . A wear member in accordance with  claim 4  wherein a first section of the abutting surface is concentric to a second section of the abutting surface. 
   
   
       6 . A wear member in accordance with  claim 5  further including at least one stop projecting from the leg in a generally transverse direction relative to the leg. 
   
   
       7 . A wear member in accordance with  claim 6  wherein said at least one stop includes a rear stop positioned in a rear portion of the wear member. 
   
   
       8 . A wear member in accordance with  claim 7  wherein said at least one stop includes a medial stop positioned in a mid portion of the wear member. 
   
   
       9 . A wear member in accordance with  claim 8  further including a second leg, wherein one said leg is an upper leg with said rear and medial stops, and the second leg is a lower leg provided with a lower stop. 
   
   
       10 . A wear member in accordance with  claim 6  wherein said at least one stop includes a medial stop positioned in a mid portion of the wear member. 
   
   
       11 . A wear member in accordance with  claim 6  further including a second leg, wherein said one leg is an upper leg with one said stop, and the second leg is a lower leg provided with one said stop. 
   
   
       12 . A wear member in accordance with  claim 1  further including at least one stop projecting from the leg in a generally transverse direction relative to the leg. 
   
   
       13 . A wear member in accordance with  claim 12  further including a second leg, wherein said one leg is an upper leg with one said stop, and the second leg is a lower leg provided with one said stop. 
   
   
       14 . A wear member in accordance with  claim 1  wherein the front end includes a nose for mounting a point. 
   
   
       15 . A wear member for mounting on a base fixed to excavating equipment, the wear member comprising:
 a front end;   a curved abutting surface for abutting a front bearing surface of the base;   at least one rearwardly extending leg including an opening to receive a lock to retain the wear member to the base, an axial slot to receive a tongue of the base, and at least one stop extending generally transverse to the leg between the opening and the abutting surface to abut a complementary stop on the base and resist movement of the wear member on the base under certain loading conditions.   
   
   
       16 . A wear member in accordance with  claim 15  wherein said at least one stop includes a rear stop proximate the opening and a medial stop proximate the front bearing surface. 
   
   
       17 . A wear member in accordance with  claim 16  wherein said stops are arranged in a tier along the leg. 
   
   
       18 . A wear member in accordance with  claim 15  further including another leg provided with a stop extending generally transverse to the leg between the opening and the abutting surface to abut a complementary stop on the base and resist movement of the wear member on the base under certain loading conditions. 
   
   
       19 . A wear assembly for excavating equipment comprising:
 a base fixed to the excavating equipment, and including a front curved bearing surface, a rearwardly extending tongue, and a stop extending generally transverse to the front bearing surface and subdividing the front bearing surface into a plurality of sections;   a wear member including a front end, a curved abutting surface for abutting the front bearing surface of the base, at least one rearwardly extending leg including an axial slot to receive the tongue of the base, an opening, and a stop extending generally transverse to the abutting surface, subdividing the abutting surface into a plurality of sections, and abutting the stop of the base to resist movement of the wear member on the base under certain loading; and   a lock received in the opening to releasably hold the wear member to the excavating equipment.   
   
   
       20 . A wear assembly in accordance with  claim 19  wherein the wear member further includes at least one stop projecting from the leg in a generally transverse direction relative to the leg.