Wear assembly for the digging edge of an excavator
AssigneeESCO Corporation
InventorsRobert K. Emrich, Terry L. Briscoe
Life of this patent
Estimating the term…
Abstract
A wear assembly for attaching wear members to a lip of an excavator includes a wear member, a boss and a lock. The lip includes an inner face, an outer face, a digging edge and a series of through-holes spaced rearward of the digging edge. The bosses are each fixed to a face of the lip at a position rearward of the through-holes. The wear members each include slots to receive the boss adjacent their rear ends, and openings for receiving the locks at a position forward of the bosses. The openings are aligned with the through-holes in the lip. The lock includes a wedge and spool arrangement.
Claims81
A wear assembly for attachment to a digging lip of an excavator wherein the lip includes a front digging edge and a through-hole spaced rearward of the digging edge, the wear assembly comprising:
- a boss fixed to each face of the lip;
- a wear member having a front working end and a rear mounting end, the mounting end of the wear member including a pair of bifurcated legs that straddle the lip, the legs and the bosses having cooperating tongue and groove constructions to support the wear member against applied loads during use of the excavator and each said leg including one said opening;
- and
- a lock received in the openings and the through-hole to engage the mounting end and the lip and hold the wear member to the lip.
A wear assembly for attachment to a digging lip of an excavator wherein the lip includes a front digging edge, the wear assembly comprising:
- a boss fixed to a face of the lip and having a front main portion and a rear abutment portion;
- a wear member having a front working end and a rear mounting end, the mounting end extending rearward over the face of the lip and having an opening and a rear end wall facing generally away from the digging edge to abut against the abutment portion of the boss, the mounting end and the main portion of the boss having a cooperating tongue and groove construction rearward of the opening to support the wear member against applied loads during use of the excavator;
- and
- a lock received in the opening to hold the wear member to the lip.
A bucket lip comprising:
- an inner face positioned within an earth-gathering cavity of an excavating bucket;
- an outer face positioned opposite the inner face and positioned outside of the earth-gathering cavity of the bucket;
- a front digging edge interconnecting the inner and outer faces;
- a series of spaced apart through-holes for receiving locks for securing wear members to the lip, each of the through-holes being open in the inner and outer faces and spaced rearward of the front digging edge;
- and
- a plurality of bosses, each to be received into a slot in one of the wear members to provide support therefor, one said boss being fixed to the inner faces and one said boss being fixed to the outer face of the lip rearward of each said through-hole.
A wear member for attachment along the lip of a bucket, the wear member comprising:
- a front working end;
- and
- a pair of rearwardly extending bifurcated legs, each said leg including an inner surface to face the lip, a rear wall, a slot that opens in the inner face and the rear wall to receive a boss on the lip, an opening to receive a lock, and a lateral wall in the slot, proximate a rear end of the opening, forming a bearing surface to engage a rear surface of the lock received through the opening.
A wear member for attachment to a lip of an excavator, the lip having a boss, the wear member comprising:
- a front working end;
- a pair of bifurcated legs that straddle the lip, each said leg including an inner wall adapted to face the lip, an outer wall spaced from the lip and defining a wear surface, and a rear wall;
- an opening extending through each said leg for receiving a lock for holding the wear member to the lip;
- and
- a longitudinal slot in at least one leg for receiving the boss, the slot being open in the inner wall and the rear wall of the respective leg and having a narrow portion defined by inwardly extending rails along the inner wall and an enlarged portion between the rails and the outer wall, the rails extending between the rear wall and the opening to engage and cooperate with rails on the boss to hold the leg to the lip.
A wear member for attachment to a lip of an excavator, the lip having a boss, the wear member comprising:
- a front working end;
- a leg that extends over the lip, the leg including an inner wall adapted to face the lip, an outer wall spaced from the lip and defining a wear surface;
- an opening extending through the leg for receiving a lock for holding the wear member to the lip;
- a longitudinal slot for receiving the boss, the slot being open in the inner wall and the rear wall and having a narrow portion defined by inwardly extending rails along the inner wall and an enlarged portion between the rails and the outer wall, the rails extending between the rear wail and the opening to engage and cooperate with rails on the boss to hold the leg to the lip;
- and
- a lateral wail in the slot proximate a rear end of the opening having a bearing face for engaging a lock to hold the wear member to the lip, the bearing face being generally perpendicular to a longitudinal axis of the slot across its entire length.
A boss to be fixed to a lip of an excavating bucket for supporting a wear member attached to the lip, the boss comprising:
- a main body to be received in a slot of the wear member, the main body having an inner surface to set against a face of the lip and a pair of opposite sidewalls;
- and
- a stem extending generally outward from the inner surface to fit within a hole in the lip.
A method of installing a wear member on a lip of an excavator wherein the lip has a through-hole and a boss on each side of the lip, the method comprising:
- placing a wear member including a pair of rearwardly extending legs, each of the legs having a longitudinal slot and a transverse opening, on a lip such that the legs straddle the lip;
- moving the wear member rearward relative to the lip such that each boss moves axially into one of the slots until reaching a mounting position where the opening in the wear member is generally aligned with the through-hole in the lip;
- and
- placing a lock into the opening and the through-hole forward of the slot and boss to hold the wear member to the lip.
A wear member for attachment to a lip of an excavator, the lip having a pair of opposite faces, a digging edge extending between the two faces, and an abutment fixed to each face, the wear member comprising:
- a front working end;
- a pair of bifurcated legs that straddle the lip, each said leg including an inner wall adapted to face the lip, an outer wall spaced from the lip and defining a wear surface, and a rear bearing wall to abut a front face of one of the abutments and thereby resist rearward deflection of the leg;
- and
- an opening in at least one of the legs forward of the bearing wall for the same said one leg for receiving a lock for holding the wear member to the lip.
A wear assembly for attachment to a lip of an excavator, the lip having a pair of opposite faces and a digging edge extending between the two faces, the wear assembly comprising:
- a boss fixed to each face of the lip, each said boss including an abutment;
- and
- a wear member including:
- a front working end;
- a pair of bifurcated legs that straddle the lip, each said leg including an inner wall adapted to face the lip, an outer wall spaced from the lip and defining a wear surface, and a bearing wall to abut a front face of one of the abutments and thereby resist rearward deflection of the leg;
- and
- an opening extending through at least one of the legs forward of the bearing wall for the same said one leg for receiving a lock for holding the wear member to the lip;
- and
- a lock received in the opening for holding the wear member to the lip.
Dependencies are inferred from the claim text.