Mobile rock drill rig

Claim 2

A mobile rock drill rig comprising a pair of laterally spaced elongated frames eaCh having an endless ground engaging trackway thereon, a chassis suspended between said frames, a head means mounted at said chassis for pivoting about an upright first axis, power actuated turning means for turning said head means about said upright first axis, first boom means mounted with one end at the head means for power actuated pivoting thereon about a second axis perpendicular to said upright first axis, second boom means carried by the outer end of said first boom means for power actuated pivoting thereon about a third axis parallel with said second axis, and a feed bar for feeding and supporting a rock drill mounted at the outer end of said second boom means for power actuated pivoting about each of two fourth and fifth axes, said fourth and fifth axes being perpendicular to each other and one of which being parallel with said second axis.

Claim 3

A drill rig according to claim 1 in which said head means is turnable about said upright axis through an angle of at least substantially 180* by the action of said power-actuated turning means.

Claim 4

A drill rig according to claim 2 in which said head means is mounted on an upright pivot shaft, the longitudinal axis of which providing said upright first axis, said turning means for turning the head means comprising a first link pivotally connected to the chassis, a second link pivotally connected between said first link and the head means and a double-acting fluid cylinder pivotally connected between the chassis and said first link.

Claim 5

A drill rig according to claim 2 in which power-actuated turning means are arranged for swinging the feed bar about each of said fourth and fifth axes through angles of at least substantially 180*.

Claim 6

A drill rig according to claim 4 in which the feed bar is pivotally mounted at a second head means for pivoting thereon about said fifth axis, said second head means being mounted at the outer end of the second boom means for pivoting about said fourth axis which is parallel with said second axis.

Claim 7

A drill rig according to claim 5 in which a power-actuated turning means is provided for pivoting said second head means about said fourth axis, said turning means comprising a first link pivotally connected to the second boom means, a second link pivotally connected between the first link and said second head means, and a double-acting fluid cylinder pivotally connected between the first link and the outer boom means.

Claim 8

A drill rig according to claim 6 in which a supporting frame is disposed between the feed bar and said second head member, the feed bar being axially slidably carried by said supporting frame and the supporting frame being pivotally mounted at the head member for swinging thereon by the action of a turning means which comprises a first link pivotally connected to the supporting frame, a second link connected between said first link and the second head portion and a double-acting fluid cylinder pivotally connected between the first link and the supporting frame.

Claim 9

A drill rig according to claim 1 in which the feed bar and the head member are pivoted by means of link mechanisms each of which being actuated by a fluid cylinder.

Claim 10

A drill rig according to claim 1 in which the chassis is journaled to each said trackway frame by means of aligned trunnion means, a double-acting fluid cylinder being pivotally connected between each of said trackway frames and the chassis.

Claim 11

A mobile rock drill rig comprising a pair of laterally spaced elongated frames each having an endless ground engaging trackway thereon, a chassis forming member suspended between said frames, an upright pivot shaft on said chassis forming member, a first head means journaled on said upright pivot shaft, a power-actuated foldable two-part boom structure pivotably mounted at the head means, a second head means pivotally mounted at the outer end of said boom structure, a feeding and supporting means for a rock drill pivotally mounted at said second head means, and a power-actuated turnIng means for adjusting said first head means into various positions between a position in which said boom structure is substantially perpendicular to the longitudinal axes of the trackway frames and projecting past one of the frames and a position in which the boom structure is substantially perpendicular to the longitudinal axes of the frames and projecting past the other of the frames, said feeding and supporting means being swingable on said second head means through an angle of at least substantially 180* in planes substantially perpendicular to a central plane through the boom structure.

Claim 12

A mobile rock drill rig comprising a pair of laterally spaced elongated frames each having an endless ground engaging trackway thereon, a chassis forming member suspended between said frames, an upright pivot shaft on said chassis forming member, a first head means journaled on said upright pivot shaft, a power-actuated foldable two-part boom structure pivotably mounted at the head means, a second head means pivotally mounted at the outer end of said boom structure, a feeding and supporting means for a rock drill pivotally mounted at said second head means, and a power-actuated turnIng means for adjusting said first head means into various positions between a position in which said boom structure is substantially perpendicular to the longitudinal axes of the trackway frames and projecting past one of the frames and a position in which the boom structure is substantially perpendicular to the longitudinal axes of the frames and projecting past the other of the frames, said feeding and supporting means being swingable on said second head means through an angle of at least substantially 180* in planes substantially perpendicular to a central plane through the boom structure.