Tool driving or impacting – Work cleansing
Patent
1991-04-23
1993-03-16
Yost, Frank T.
Tool driving or impacting
Work cleansing
175320, E21C 106, E21B 1718
Patent
active
051936267
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
The present application is a National Phase application corresponding to PCT/EP90/01353 filed Aug. 17, 1990 and based, in turn, upon an application P 39 27 952.9 filed in Germany under the International Convention.
The present invention relates to a drilling device, particularly for the drilling of shot holes, with a carriage slide for the advance and retraction of the drill rod assembly formed of individual drill rods, and including a feeding system and a pressure-medium actuated drive for the drill rod assembly. More particularly the invention relates to a system of this type located on a slide movably mounted on the carriage, as well as with a hydraulically actuated intra-hole hammer, whereby the drive for the drill rod assembly transmits to the latter a to-and-fro oscillatory motion , preferably with an oscillation angle of 180-360 degrees, and the drill rods are provided with two outwardly opening longitudinal channels for the accommodation of hydraulic hoses for the supply and return flow of the pressure oil for the intra-hole hammer and a compressed air line, and a hose insertion and retraction mechanism is mounted on the slide of the drive for the drill rod assembly and is directly or indirectly linked to the drive member.
BACKGROUND OF THE INVENTION
In the known drilling device over which the present invention is an improvement, in order to transmit the torque from the oscillating drive to the drill rod assembly, the drill rods are provided with a contour so that an interlocking results (see German Patent Document 38 42 081 and U.S. Pat. No. 5,092,411). The same result may be realized by means of a clamping device. The advance as well as the extraction are performed via the chain drive of the flushing head. As soon as the slide reaches its lower position and the flushing head has been retracted into its upper starting position, a new drill rod from a drill rod magazine can be inserted. The spent drill rod assembly in the bore hole is kept in place in the usual manner by a mounting head. At this point, the slide is brought back to its upper position via a special drive.
While the slide is being brought back to this position, the hydraulic hoses are pressed into the longitudinal channels of the newly inserted drill rod by the hose insertion and retraction mechanism, whereafter the boring operation of the newly inserted drill rod can start. When the rod system is pulled out, the process takes place in reverse order, whereby from each of the removed drill rods the hydraulic hoses are pushed out by the retraction elements during the travel of the slide. When the drill rods are designed as hollow rods, the flushing air is supplied through them. However, if they are made of a solid material, the flushing air for the intra-hole hammer cannot be blown through the interiors of the drill rods, so that they must be equipped with ducts for the blast air.
OBJECT OF THE INVENTION
It is the object of the invention to improve the drilling device of the aforedescribed type so that the torque transmission of the oscillating drive to the drill rod assembly can take place without providing any special contour of the drill rods constituting the drill rod assembly and/or without additional clamping devices.
SUMMARY OF THE INVENTION
According to the invention, this object is achieved by having the flushing head, the hose insertion and removal mechanism, as well as the actuation element of the oscillating drive form a drive unit, which is swingably mounted on the slide of the carriage. The flushing head in the drive unit is swingable about an axis running transversely with respect to the longitudinal axis of the drill rods. The flushing head has a recess in its connection area with the drill rod ends. The recess is shaped to fit one of the drill rod ends, so that the torque transmission for the drill rods takes place through interlocking. Because of this construction, the flushing head does not perform only the customary advance movement and the extraction of the drill rod
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Dubno Herbert
Kateshou Yuri
Rudolf Hausherr & Sohne GmbH & Co. KG
Smith Scott A.
Yost Frank T.
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