Earth working – With drive means for tool or cleaner – Blade movable with respect to cyclically driven carrier
Patent
1999-11-22
2000-12-19
Novosad, Christopher J.
Earth working
With drive means for tool or cleaner
Blade movable with respect to cyclically driven carrier
172111, 172123, 172532, 175 19, E02F 306
Patent
active
061616257
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The equipment in question allows the ground to be dug, from the outside, without the need for complex and destructive excavation work. Use of the equipment is of fundamental importance, for example, for the planting of trees in cities where it is impossible or extremely costly to use excavators, which destroy and damage the paving and pipes, sewerage systems, underground cables and any other objects which are very commonly found underneath the ground in cities.
These and other objects and advantages will emerge from the text which follows.
SUMMARY OF THE INVENTION
The equipment in question comprises a hinged support and maneuvering arm for an operating assembly which is equipped with a vibration or oscillation generator, a motor, and a tool which is made to rotate by the said motor means and provided with a helical structure designed to penetrate in screw fashion into the ground and act thereon by means of the vibrations received, so as to dislodge it and break it up.
The vibration generator is advantageously--but not necessarily--a vibrator which is of the axial type or has a predominant axial component.
The operating assembly advantageously comprises a damping device, in particular of the omnidirectional type, designed to reduce the transmission of the vibrations from the vibration or oscillation generator to the support arm, and allow limited inclination of the geometrical axis of the tool, also so as to vary the direction of movement thereof.
The tool may extend in the manner of a helical stem, or may have an axial stem terminating in a helix, or else may have an axial stem with a ferruled tip and a helical element which extends rearwards from the ferrule.
In another configuration, the tool has an axial stem with curved sickle-shaped bars which are slightly inclined downwards (in the operating position), ie. towards the end of the stem and, underneath said bars, additional bars which are similar, but shorter and less curved than the preceding ones
The hinged support arm may comprise--in addition to several segments hinged together--an angular articulated joint and an axial displacement system for the tool.
The motor may be designed to rotate also in opposite directions so as to obtain both penetration into the ground and extraction from the ground.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood from a reading of the description with reference to the accompanying drawing which shows a non-limiting example of embodiment thereof. In particular, in the drawing:
FIG. 1 shows an overall schematic view of the equipment according to the invention;
FIGS. 2 and 3 show a perspective view of two possible variants of the "auger" tool illustrated in FIG. 1, which can be applied as an alternative to the latter;
FIGS. 4 and 5 are a side view and axial view of another variation of embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
According to that illustrated in the accompanying drawing, 1 denotes a self-propelled machine which is equipped with an articulated multiple arm, generally denoted by 3, of a type known per se. In particular, this arm may be hinged with the machine 1 about a vertical axis X--X, may have a first arm section 5 hinged at 7 with the bracket 9 hinged along the axis X--X, a second arm section 10 hinged at 12 with the arm section 5 and a bracket 14 hinged at 16 with the arm section 10. Actuators 18, 20, 22 operate between the bracket 9 and the section 5, between the sections 5 and 10 and between the section 10 and the bracket 14. The bracket 14 carries an operating assembly 26, of which a tool 28 forms part. In particular, the assembly 26 comprises a group 30 which is capable of performing axial displacements and which has a substantially predominant vertical component along an axial guide 32 and hence in a direction indicated by the arrow f32; the axial displacements of the guide 32 may be actuated by means of a cylinder/piston actuator 34, which displaces the assembly 26 and hence the tool-carrying group 30. A damping device 36 of the omnidi
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