An elongate frame, preferably comprising a pair of structural channels secured together in mutually spaced, back-to-back, parallel relationship, has a trackway along a longitudinal face mounting a carriage for reciprocation. An elongate, hydraulic power cylinder unit is secured to and extends along one end portion of the frame and carries at its work stroke extension end tandem idler sheaves about which are looped respective ropes that extend to and from respective idler sheaves at opposite ends of the frame. One set of ends of such ropes are attached to opposite ends of the carriage, respectively, and the other set of ends are anchored to the frame adjacent opposite ends thereof, respectively. The cylinder of the power unit preferably has an easily removable cylinder head through which extends an elongate piston rod that carries the tandem sheaves externally of the cylinder and that is guided and supported by cooperative means secured to such rod and to the frame, respectively.
A mobile vehicle is disclosed having a boom pivotally mounted thereon for slewing about a vertical axis and a work head attached to the free end of the boom by a universal mounting. The universal mounting consists of a first housing having a base attached to the boom and a power driven worm in drive relation with a worm gear in the housing. The worm gear has a central hub to which is connected a second housing and which in turn has a driven worm in drive relation with a worm gear mounted therein. The worm gear in the second housing has a central hub and to which is attached a support carrying the work head.
A hydraulically operated drilling apparatus having a main mast on which an extension is mounted having a rope winch or the like for operating a rotary drilling head or power capstan. The drilling head is guided on a pair of diametrically opposed rails fixed on the outer circumference of the mast along its entire length and is pulled by a cable of a block and tackle system activated by a hydraulic power drive located within the mast. The cable of the block and tackle system which in part runs on the exterior of the mast passes into the mast and is caused to run over a movable pulley sheave secured at each end of the mast. The sheaves at the end of the mast are mounted on bearings which also anchor the cable, which bearings are securely and integrally formed with end caps or covers, sealing the end of the mast.
The invention relates to a drilling equipment whose annular bit (4) for cutting the rock located in the deepest point of the drill hole is provided with high-pressure water-jet nozzles and is connected via a flexible high-pressure hose pipe (13) with a high-pressure pump. In order to be able to drill with the aid of such a drilling equipment small-diameter drill holes of high directional stability, the invention proposes that the high-pressure hose pipe (13) be constructed to be rigid under torsion, non-rotatably connected to the annular bit (4) and the turning drive (24, 25) of the drilling machine (8) and to be journaled in a non-rotatable jacket tube (15) elastically deflectable from the extension position, said jacket tube being rigid in radial direction and guided in the area of the drill hole mouth in a deflecting device (7) and displaceable together with the high-pressure hose pipe (13) in its longitudinal direction.
