Abstract:
An eccentric assembly for a walking mechanism is provided. The eccentric assembly includes a barrel member and a shaft member. The barrel member includes a circumferential portion extending in a longitudinal direction and a web portion extending inwardly from the circumferential portion. Further, the web portion includes a cut-out region and an inner periphery outlining the cut-out region. The shaft member includes a tubular portion extending in the longitudinal direction and a flange portion extending outwardly from the tubular portion. The flange portion includes an outer periphery. Further, the shaft member is coupled to the barrel member such that the outer periphery of the flange portion substantially conforms to the inner periphery of the web portion. Further, the flange portion is configured to adjust an eccentricity of the shaft member with respect to the barrel member.
Abstract:
An improved eccentric used in walking mechanism sub-assemblies used in heavy equipment, specifically drag line excavators. The walking assemblies include a power driven output shaft which engages and rotates an eccentric fitting journaled within a leg housing which is in turn pivotally secured to the walking assembly shoes and through a support linkage to the excavator frame imparting a modified elliptical travel path thereto. The improvement is directed to the eccentric which is of a multiple component fabrication for increased performance and use durability and extended life.
Abstract:
A lifting stool for applying lifting force to the support tub of a dragline excavating machine during walking movement of the machine in which the machine is lifted upward by a lifting mechanism comprising part of the machine. The lifting stool includes a ring having a circular vertical wall member affixed to the support tub and defining a laterally closed space. The circular vertical wall member includes upper and lower separated wall sections defining the vertical space. A lifting plate is positioned within the vertical wall member and a lifting pin is connnected between the excavating machine and the lifting plate. The lifting plate extends into the vertical space between the upper and lower wall sections and is affixed to the two wall sections. Thus, during walking movement of the excavation machine the support tub will move upward with the lifting pin and the lifting stool.
Abstract:
A peripheral, radial surface extends outwardly and upwardly from the bottom surface of a circular tub which supports a walking dragline excavator or like machinery. The extension surface reduces bearing pressure on the tub in both stationary and walking positions, and facilitates sliding of the tub relative to underlying terrain as the equipment is moved. The extension surface is angularly disposed relative to the bottom tub surface so as to be substantially parallel to the terrain during walking movement of the dragline. Thus, the dragline load is distributed over a relatively large area, and the bulldozing effect of the tub's trailing edge is minimized.
Abstract:
A walking dragline excavator has, for a propel system, a center base with movable feet on either side that are translated horizontally in the direction of travel, lowered to the ground and utilized to support the excavator which is then hoisted and translated to its next location over the feet and lowered again onto its base. The traction system for moving the feet and propelling the excavator includes a combination of a radial disc cam and crank on each side of the excavator that engage a pair of rollers and a slot respectively in a pedestal on each foot.
Abstract:
For a machine, for example a power loader, coal cutter or drilling rig running on a track in a mine, the machine including a ram attached thereto, walking gear connected to said ram and mounted to be slidable on the track or on a rail extending parallel to the track, the gear having two effective positions determined by initial actuation of the ram, in one position the gear being locked to the rail whereby further movement of the ram moves the machine along its tracks away from the stationary gear, and in the other position the gear being freely slidable along its rail whereby movement of the ram draws the gear towards the stationary machine.
Abstract:
Walking mechanism for moving a ground-engaging device, such as large earth-working machinery, over open terrain including soft ground. The mechanism includes a pair of assemblies, each of which has a support pad, and drive and weight-transferring cylinders connected between the device and the pad. Hydraulic control circuitry for each assembly sequentially slides the pad and the device in separate steps along the ground with the operation of the two assemblies being controlled and timed to create continuous or discontinuous movement of the device as well as to provide reversing and turning movements of the device.