RIG WALKING SYSTEM WITH CANTILEVER-MOUNTED LIFTING JACK ASSEMBLIES

摘要

A walking system for moving a load over the ground includes a substructure having laterally spaced-apart, rigidly interconnected main beams for carrying the load above the ground. A jack support beam is mounted as a cantilever on top of each main beam on opposite ends thereof, and each includes a lifting jack assembly. Each lifting jack assembly includes a power-driven hydraulic cylinder having a ram with a foot plate, and each is selectively operable for extending a ram downwardly to force the foot plate against the ground to raise the substructure off the ground, and for retraction to disengage the foot plates from the ground, thereby lowering the substructure to the ground. Each jack lifting assembly further includes a shifter mechanism selectively operable for displacing the main beams and the substructure along the ground in a selected steering mode when the lifting jack assemblies have been actuated to raise the main beams and the substructure above the ground.

主权项

1. A walking machine for moving a load over the ground comprising:
a substructure having first and second main interconnected main beams for carrying the load above the ground; a first lifting assembly mounted adjacent a first end of each main beam including a power-driven cylinder connected to a plunger element with a foot plate, a second lifting assembly mounted adjacent an opposite, second end of each main beam including a power-driven cylinder connected to a plunger element with a foot plate, wherein each power-driven cylinder is selectively operable for extending its plunger element downwardly to force its foot plate against the ground to raise the substructure off the ground, and for retraction to disengage its foot plate from the ground, thereby lowering the substructure to the ground; a first shifter mechanism mounted on each first lifting assembly; a second shifter mechanism mounted on each second lifting assembly; each first shifter mechanism being selectively operable for simultaneous extension and retraction in opposition to one another to displace the main beam and the substructure along the foot plates in a selected steering mode when the lifting assemblies have been actuated to raise the main beams and the substructure above the ground.