Excavating – Ditcher – Condition responsive
Patent
1994-10-20
1996-07-09
Melius, Terry Lee
Excavating
Ditcher
Condition responsive
414719, B66C 2372
Patent
active
055332846
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an earth-moving machine, such as a cable dredger, hydraulic dredger, ditcher or backhoe, loading shovel or front loader or the like, with a bogie optionally connected to a moving gear, on which a superstructure that is optionally pivotable about a vertical axis is supported, on which among other elements a working gear or attachment, operatively connected to a counterweight, is provided.
German Patent Disclosure DE-OS 32 32 163 relates to a hydraulically driven digger or dredger that, to increase its performance with neutralization of its own weight, has mechanical-hydraulic working elements, such as compression springs, leaf springs, tension springs or counterweights, by which the intrinsic weight of the cantilever arm together with the attachment (shovel, gripper, chisel and other parts) is cancelled out with respect to force. An extension can be attached to the cantilever suspension and a counterweight mounted on it, whose weight depends on the size of the cantilever arm and gear. By neutralizing the intrinsic weight of the cantilever arm, the basically necessary transport and the requisite associated attendant important of energy is now no longer necessary. Not only does this free up additional performance capacity, but considerable driving energy can also be spared, while the work done remains the same.
The gear and counterweight here are supported on a common support block on the superstructure, and a hydraulic ram is provided between the superstructure and the gear, the ram optionally cooperating with a spring. A disadvantage here proves to be that because of the geometrical arrangement and the pivotability of the counterweight above the superstructure, the stability of the equipment with the counterweight raised is fundamentally questionable.
Examined German Patent Disclosure DE-AS 19 17 434 relates to an earth-moving machine, such as a digger or dredger or the like, with a rotary device, disposed on a moving gear, that carries a revolving tower containing the working device and a counterweight. A vertically oriented adjustable parallelogram support is disposed between the rotary device and the revolving tower. The support it comprises two parallel arms, pivotably connected on one end to a platform located on the rotary device and on the other to the revolving tower. Between one of the arms and the platform or the revolving tower, a piston-cylinder arrangement is provided. The parallelogram and thus the shifting of the counterweight or components of the superstructure are adapted each time to a given working situation or transport purpose, so that in the final analysis, since an operative connection between the gear and the counterweight is lacking, the engineering expense is relatively high.
SUMMARY OF THE INVENTION
The object of the invention is to improve an earth-moving machine in such a way that the potential energy of the particular working cycle is stored by simple constructive means, so that it can be employed usefully again in the next cycle.
According to the invention, this object is attained in that the superstructure is divided into a stationary part, optionally rotatable about the vertical axis, and a part swivelable about a horizontal axis, wherein the swivelable part is connected indirectly or directly to the working gear.
The subject of the invention is usefully employed in all earth-moving machines, in particular cable dredgers, hydraulic dredgers, backhoes and front loaders. The rocker, depending on the particular equipment, is either supported as an integral component on a support block, or else a division of the gear and pivotable section is made, each section then being supported separately on a support block and connected to one another by suitable connecting elements, such as cables, chains or hydraulic cylinders.
The subject of the invention is shown in terms of an exemplary embodiment in the drawing and will be described as follows.
BRIEFS DESCRIPTION OF THE DRAWINGS
Shown are:
FIGS. 1 and 2--front loader with vari
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Melius Terry Lee
O&K Orenstein & Koppel AG
Pezzuto Robert
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