Excavating tooth assembly with releasable lock pin assembly

A lock pin assembly for securing a wear member including an opening to a support structure having a passage alignable with the opening, the lock pin assembly comprising:

• a main body including:
• a first bore extending longitudinally inwardly from a main body outer face;
• a second bore extending radially inwardly to an intersection with the first bore;
• and
• a pin assembly threadably disposable in the first bore to an inserted position, the pin assembly including:
• a pin body having a pin body outer face and a pin body inner face;
• a rotatable shaft extending longitudinally from the pin body outer face to the pin body inner face, wherein the rotatable shaft is rotatable between a locked position and an unlocked position;
• a cam rotationally coupled to the rotatable shaft adjacent the pin body inner face;
• and
• a lock assembly disposed in the second bore, wherein the lock assembly is radially displaceable in the second bore and biased radially inwardly to inhibit removal of the pin assembly from the main body when the pin assembly is at the inserted position and the rotatable shaft is at the locked position.

A method for securing a wear member to support structure using a lock pin assembly, wherein the wear member includes a first opening alignable with a second opening in the support structure, the method comprising:

• positioning the lock pin assembly within the second opening in the support structure, wherein the lock pin assembly includes a main body;
• introducing a pin assembly in the first opening of the wear member and threadably disposing the pin assembly in a first bore of the main body to an inserted position, wherein the first bore extends longitudinally inwardly from an outer face of the main body along a longitudinal axis of the main body, and wherein the pin assembly extends into at least a portion of the second opening when the pin assembly is in the inserted position;
• and
• rotating a rotatable shaft from an unlocked position to a locked position, wherein the rotatable shaft extends longitudinally through a pin body of the pin assembly from a pin body outer face to a pin body inner face, wherein the rotatable shaft is rotationally coupled to a cam proximal the pin body inner face, and wherein the cam interfaces with a lock assembly extending from a second bore such that when the rotatable shaft is in the locked position the lock assembly inhibits the pin assembly from rotating and moving from the inserted position.

A method for removing a wear member from a support structure using a lock pin assembly, wherein the wear member includes a first opening alignable with a second opening in the support structure, the method comprising:

• rotating a rotatable shaft of a pin assembly of the lock pin assembly from a locked position to an unlocked position, wherein the rotatable shaft extends longitudinally through a pin body of the pin assembly from a pin body outer face to a pin body inner face, wherein the rotatable shaft is rotationally coupled to a cam proximal the pin body inner face, and wherein the cam interfaces with a lock assembly extending from a second bore such that, when the rotatable shaft is in the locked position and the pin assembly is in an inserted position, the lock assembly inhibits the pin assembly from rotating and moving from the inserted position and, when the rotatable shaft is in the unlocked position, the lock assembly allows the pin assembly to rotate and move from the inserted position;
• threadably removing the pin assembly from a first bore of a main body of the lock pin assembly, wherein the first bore extends longitudinally inwardly from an outer face of the main body along a longitudinal axis of the main body, and wherein the pin assembly extends into at least a portion of the second opening when the pin assembly is in the inserted position;
• and
• removing the lock pin assembly from the second opening in the support structure.