Tip and adapter coupling system

Abstract

A lock assembly for attaching a wear member to a base includes a retaining block with a spring attached to the retaining block that fits into an aperture of the base. A lock pin fits into the aperture of the wear member, and the aperture of the retaining block, retaining the wear member onto the base. The lock pin engages the spring that prevents unintentional rotation of the lock pin so that the lock pin is trapped in the aperture of the wear member, preventing its unintentional removal.

What is claimed is: 
     
         1 . A tip and adapter assembly comprising:
 a tip that includes a body that defines a direction of assembly, a vertical axis that is perpendicular to the direction of assembly, and a lateral axis that is perpendicular to the vertical axis and the direction of assembly, the body including:
 a forward working portion disposed along the direction of assembly including a closed end; and 
 a rear attachment portion disposed along the direction of assembly including an open end; 
 wherein the rear attachment portion defines
 an exterior surface; 
 an adapter nose receiving pocket extending longitudinally from the open end; 
 a retaining mechanism receiving aperture in communication with the adapter nose receiving pocket and the exterior surface; and 
 a first ledge defining a first lateral undercut in the retaining mechanism receiving aperture; and 
 
   an adapter that includes a body comprising a nose portion that is configured to fit within the adapter nose receiving pocket of the tip, the body including an outer surface defining a polygonal retaining block receiving aperture.   
     
     
         2 . The tip and adapter assembly of  claim 1 , wherein the polygonal retaining block receiving aperture at least partially forms a counterbore with a bottom pin receiving aperture. 
     
     
         3 . The tip and adapter assembly of  claim 2 , wherein the bottom pin receiving aperture is blind, and at least partially round. 
     
     
         4 . The tip and adapter assembly of  claim 1 , wherein the polygonal retaining block receiving aperture defines a perimeter having an octagonal configuration. 
     
     
         5 . The tip and adapter assembly of  claim 4 , wherein the octagonal configuration includes a first side, a second side that is parallel to the first side, a third side that is perpendicular to the first side, and a fourth side that is perpendicular to the second side. 
     
     
         6 . The tip and adapter assembly of  claim 5 , wherein the octagonal configuration includes a first angled surface that is oblique to the first side, a second angled surface that is oblique to the second side, a third angled surface that is oblique to the third side, and a fourth angled surface that is oblique to the fourth side. 
     
     
         7 . The tip and adapter assembly of  claim 6 , wherein the first angled surface is differently configured than the second angled surface, the third angled surface, and the fourth angled surface. 
     
     
         8 . The tip and adapter assembly of  claim 7 , further comprising a retaining block that is disposed in the polygonal retaining block receiving aperture such that the retaining block contacts the first side, the second side, the third side, and the fourth side, but does not contact the first angled surface, the second angled surface, the third angled surface, and the fourth angled surface. 
     
     
         9 . The tip and adapter assembly of  claim 8 , wherein the retaining block defines a central pin receiving aperture, and a spring receiving aperture that extends from the central pin receiving aperture toward an exterior of the retaining block. 
     
     
         10 . The tip and adapter assembly of  claim 9 , further comprising a spring that is disposed in the central pin receiving aperture, and the spring receiving aperture, and a pin disposed in the central pin receiving aperture, defining a notch that receives the spring. 
     
     
         11 . A wear member comprising:
 a body that defines a longitudinal axis, a vertical axis that is perpendicular to the longitudinal axis, and a lateral axis that is perpendicular to the vertical axis and the longitudinal axis, the body including:   a forward wear portion disposed along the longitudinal axis; and   a rear attachment portion disposed along the longitudinal axis including an open end;   wherein the rear attachment portion defines
 an exterior surface; 
 an adapter nose receiving pocket extending longitudinally from the open end; 
 a retaining mechanism receiving aperture extending from the exterior surface through the body to the adapter nose receiving pocket; and 
   a first ledge defining a first lateral undercut in the retaining mechanism receiving aperture.   
     
     
         12 . The wear member of  claim 11 , wherein the retaining mechanism receiving aperture defines an axis of rotation, a surface of revolution, and a circumferential direction, and the first ledge extends circumferentially from a first stop to a first tab receiving slot that is spaced circumferentially away the first stop, that is exposed to an exterior of the wear member, and which is defined by a second ledge that is spaced axially inwardly from the first ledge toward the adapter nose receiving pocket. 
     
     
         13 . The wear member of  claim 12 , further comprising a first ejector ramp extending circumferentially away from the first tab receiving slot to an exterior of the first ledge. 
     
     
         14 . A wear member assembly comprising the wear member of  claim 13 , and a pin including a first tab that is disposed circumferentially adjacent the first stop and laterally in the first lateral undercut, and a second tab that is spaced circumferentially away from the first tab being disposed axially adjacent the second ledge in the first tab receiving slot. 
     
     
         15 . A wear assembly comprising the wear member of  claim 13 , further comprising a pin including a first tab this is disposed circumferentially in the first tab receiving slot axially adjacent the second ledge, and a second tab that is spaced circumferentially way from the first tab contacting the first ejector ramp. 
     
     
         16 . The wear assembly of  claim 14 , wherein the pin defines a notch spaced axially away from the first tab and the second tab toward the adapter nose receiving pocket. 
     
     
         17 . The wear assembly of  claim 14 , wherein the pin includes a cylindrical surface from which the first tab and the second tab radially extend. 
     
     
         18 . The wear assembly of  claim 14 , wherein the pin includes a conical surface that defines the notch. 
     
     
         19 . A wear member assembly comprising:
 a wear member including
 a body that defines a longitudinal axis, a vertical axis that is perpendicular to the longitudinal axis, and a lateral axis that is perpendicular to the vertical axis and the longitudinal axis, the body including:
 a forward wear portion disposed along the longitudinal axis; and 
 a rear attachment portion disposed along the longitudinal axis including an open end;
 wherein the rear attachment portion defines 
  an exterior surface; 
  an adapter nose receiving pocket extending longitudinally from the open end; 
  a retaining mechanism receiving aperture extending from the exterior surface through the body to the adapter nose receiving pocket; and 
  a first ledge defining a first lateral undercut in the retaining mechanism receiving aperture; 
 
 
   a pin including a first tab that is disposed circumferentially adjacent the first stop and laterally in the first lateral undercut, and a second tab that is spaced circumferentially away from the first tab being disposed axially adjacent the second ledge in the first tab receiving slot; and   a retaining block configured to be received in an adapter, the retaining block including a central pin receiving aperture.   
     
     
         20 . The wear member assembly according to  claim 19 , wherein the retaining block is polygonal.