Drill boom arrangement
AssigneeAtlas Copco Aktiebolag
InventorsErich V. Kimber, Nils Hokby
Life of this patent
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Abstract
A hydraulic drill boom arrangement for drifting and tunnelling comprises a boom proper (10) that is universally pivotably carried by a support plate (13) and carries a feed beam (40) for a rock drill (41) at its outer end. Two hydraulic cylinders (16, 17) are coupled between the support plate and the boom and located on each side of the boom so that both cylinders are loaded by the weight of the boom, which makes the boom very stable in all positions.
Claims10
In a drill boom arrangement for positioning an elongated rock drilling apparatus to different drilling positions with respect to a boom support, comprising a boom support (13), a boom (10), a first universal joint (11,12) connecting said drill boom (10) to said boom support (13), first (17) and second (16) hydraulic cylinders coupled to said boom (10) for pivoting said boom in a vertical swinging plane, and second (18, 19) and third (18.sup.1, 19.sup.1) universal joints connecting respectively said first and second hydraulic cylinders (17, 16) to said boom support (13),
- the improvement wherein:
- said second and third universal joints (18, 19 and 18.sup.1, 19.sup.1) are located on different sides of the vertical swinging plane of said boom (10) so as to provide means for swinging said boom both laterally and vertically during extension and contraction of solely either one of said first and second hydraulic cylinders.
Dependencies are inferred from the claim text.