초록 ▼

Disclosed is apparatus for drilling or boring a hole in the earth, as for forming blast holes. The apparatus disclosed is of the self-propelled mobile type having at one end a driver cab and at the other end drilling apparatus including a drill storage and handling rack adapted to store drill rods a

Disclosed is apparatus for drilling or boring a hole in the earth, as for forming blast holes. The apparatus disclosed is of the self-propelled mobile type having at one end a driver cab and at the other end drilling apparatus including a drill storage and handling rack adapted to store drill rods and as required to bring them into alignment with the drilling axis to form a drill string and to remove the drill rods from the drill string. The apparatus also supplies air to and through the drill string to blow out debris from the drilled hole. The apparatus includes a unique and efficient type of mechanism for rotating the drill rack to bring drill rods to or remove them from the drill string. Also disclosed is a unique type of drill rod particularly adaptable for use in the apparatus.

대표청구항 ▼

Apparatus for drilling holes downwardly into the earth comprising a wheeled vehicle having a frame; a drilling mast mounted on said frame for pivotal movement, between an upright drilling position and lateral position, about a first axis fixed with respect to said vehicle frame; a driving bar extend

Apparatus for drilling holes downwardly into the earth comprising a wheeled vehicle having a frame; a drilling mast mounted on said frame for pivotal movement, between an upright drilling position and lateral position, about a first axis fixed with respect to said vehicle frame; a driving bar extending longitudinally of and supported by said mast for rotation about a second axis fixed relative to said mast; driving head means on said mast for rotating a drill rod when said mast is in said upright position, said driving head means being supported on said mast for movement upwardly and downwardly thereof when said mast is in said upright position, said driving head means comprising a rotatable spindle member adapted to rotate a drill rod and to be connected to and disconnected from a drill rod, and means slidably but non-rotatably engaging said driving bar means to positively rotate said spindle member from said driving bar; power means carried by said vehicle frame and adapted to drive a drive shaft rotatably mounted on said frame for rotation about a third axis fixed with respect to said frame and extending transversely toward said mast when it is in its upright drilling position; and disconnectible driving means between said drive shaft on said vehicle frame and said drive bar on said mast, said driving means comprising a driving member having a free end and rigidly connected at its other end to said drive shaft and a driven member having a free end and rotatably mounted on said mast for rotation about a fourth axis fixed with respect to said mast and located to coincide with said third axis when said driving and driven members are connected in driving engagement, said driven member being connected at its other end for positive rotation to said driving bar, said driving and driven members being adapted to be connected at their free ends in driving engagement with said third and fourth axes coinciding when said mast is in its upright drilling position and to be disconnected when said mast is in its lateral position, said driving and driven members being adapted to automatically connect in driving engagement when said mast is in its upright position and to automatically disconnect when said mast is moved from its upright position, one member of said driving member and said driven member comprising an apertured mating portion having an aperture of polygonal cross section and said other member of said driving member and said driven member comprising a projecting mating portion of polygonal cross section matching that of said aperture and adapted to enter into said apertured mating portion to provide driving engagement between the driving and driven members, the mating portion of one member of said driving member and said driven member being adapted to move axially but non-rotatably relatively to a remainder of such member and being biased for movement toward the free end of said member but being capable of being moved axially away from the free end of said member when the mating portion of the other member contacts it in non-mating angular relation as said mast is moved to its upright position, said axially movable mating portion being adapted when said mating portions reach mating angular relation on rotation of said driving member to move toward the free end of the member of which it is a part so that said apertured mating portion receives in its aperture the projecting mating portion of said other member to provide positive driving engagement between said driving and driven members.