Drill boom arrangement
AssigneeAtlas Copco Aktiebolag
InventorErich V. Kimber
Life of this patent
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Abstract
In a drill boom arrangement, a feed beam for a rock drill is turnable by means of a hydraulic turning device (34) about an axis (45) that is normally parallel with the axis of drilling during drifting. When not actuated, the turning device (34) is at least partially relieved of torque by means of a friction coupling (52) which is coupled in parallel with the turning device and is normally engaged. The coupling is automatically released when the turning device is actuated. A slip-coupling (67) is coupled in parallel with the first coupling (52) and in series with the turning device in order to avoid overloading of the turning device which is hydraulically self-braking.
Claims18
A drill boom arrangement comprising:
- a boom support (13),
- a boom (10) pivotably carried by said boom support,
- a boom head (24) which carries an elongated rock drilling apparatus (40,41) and is itself pivotably carried by said boom,
- a power operated turning device (34) for turning said elongated rock drilling apparatus relative to said boom head about an axis (45) which is substantially parallel with a vertical swinging plane of said elongated rock drilling apparatus,
- a bias engageable power operated coupling means (52) which is coupled in parallel with said turning device (34) between the boom head (24) and the rock drilling apparatus (40,41) for locking said elongated rock drilling apparatus relative to said boom head against rotation about said axis (45), and
- control means (62,66) coupled to said coupling means (52) and arranged to automatically release said coupling means (52) upon actuation of said turning device (34).
A drill boom arrangement comprising:
- a boom support (13),
- a boom (10) pivotably carried by said boom support,
- a boom head (24) which carries an elongated rock drilling apparatus (40,41) and is itself pivotably carried by said boom,
- a power operated self-braking turning device (34) for turning said elongated rock drilling apparatus relative to said boom head about an axis (45) which is substantially parallel with a vertical swinging plane of said elongated rock drilling apparatus,
- a power operated coupling means (52) which is coupled in parallel with said turning device (34) between the boom head (24) and the rock drilling apparatus (40,41) said coupling means comprising a first friction coupling (52) for locking said elongated rock drilling apparatus relative to said boom head against rotation about said axis (45), and
- a slip-coupling (67) arranged operatively in series with said self-braking turning device (34) and in parallel with said first friction coupling (52), so that the locking torques of said first friction coupling (52) and said slip coupling (67) are added.
Dependencies are inferred from the claim text.