Configuring operative arm of excavator with adapter body to extend operative arm

Abstract

An excavator includes an undercarriage including a track, a turret rotatable on the undercarriage, the turret including a chassis, a first operative arm set, a second operative arm set, an adapter body coupling the first operative arm set to the second operative arm set; and a work tool coupled to the distal end of the second distal arm. The first operative arm set comprises (i) a main arm rotatably mounted on the chassis, (ii) a first distal arm rotatably mounted on the main arm, (iii) a main hydraulic actuator coupled to the main arm and the chassis and (iv) a first distal hydraulic actuator, with the main hydraulic actuator being operable to rotate the main arm relative to the chassis and the first distal hydraulic actuator being coupled to the distal arm. The second operative arm set comprises (i) an intermediate arm rotatably mounted on the first distal arm, (ii) a second distal arm rotatably coupled to the intermediate arm, (iii) an intermediate actuator coupled to the intermediate arm and the second distal arm and (iv) a second distal hydraulic actuator coupled the second distal arm. The first distal arm includes a distal end coupled to the adapter body, the intermediate arm includes a proximal end coupled to the adapter body and a distal end coupled to the second distal arm, and the second distal arm includes a proximal end coupled to the intermediate arm and a distal end coupled to the work tool. The distal end of the first distal arm is adapted to be coupled to the work tool whereby the work tool and adapter body are interchangeable.