US 4,232,849 AGranted

Drill boom arrangement

AssigneeAtlas Copco Aktiebolag

InventorsErich V. Kimber, Axel L. Lundstrom

Life of this patent

Estimating the term…

Loading patent…

Abstract

A drill boom arrangement comprises a boom proper (10) that is universally pivotably mounted on a support plate (13). The boom is swingable by means of two hydraulic cylinders (16, 17) that are coupled between the support plate and the boom to form a tripod with the boom. The hydraulic cylinders are located on each side of a vertical plane through the boom. A boom head (24) is universally pivotably mounted on the outer end of the boom (10) and it carries a feed beam (40) for a rock drill (41). The boom head is swingable by means of two hydraulic cylinders (27, 28) that are coupled between the boom and the boom head to form another tripod with the boom. These two tripods have similar geometry but the hydraulic cylinders of one tripod is located under the boom and the hydraulic cylinders of the other tripod is located above the boom. The left hand hydraulic cylinder of one tripod is hydraulically coupled in series with the right hand hydraulic cylinder of the other tripod and vice versa so as to provide for parallel displacement of the feed beam when the boom is being swung.

Claims34

Dependent claims

A drill boom arrangement with hydraulic parallel motion means for positioning an elongated rock drilling apparatus (40,41) to different drilling positions with respect to a boom support, comprising:

a boom support (13);
a boom (10) pivoted at the rear end thereof on a first universal joint (11,12) for lateral and vertical swinging;
first (17) and second (16) hydraulic cylinder means pivotally connected between said boom (10) and support (13) for swinging said boom;
a boom head (24) carrying said elongated rock drilling apparatus (40,41) and pivoted at the forward end of said boom (10) on a second universal joint (25,26) for lateral and vertical swinging;
third (28) and fourth (29) hydraulic cylinder means for swinging said boom head (24) and rock drilling apparatus (40,41);
a third universal joint (18,19) arranged on one side of the vertical swinging plane of the boom (10);
said boom support (13) carrying said first hydraulic cylinder means (17) for swinging about said third universal joint (18,19);
a fourth universal joint (30',31') arranged on the other side of the vertical swinging plane of the boom (10);
said third hydraulic cylinder means (28) being pivotally connected to said boom head (24) for swinging about said fourth universal joint (25,31);
a fifth universal joint (18',19');
said boom support (13) carrying said second hydraulic cylinder means (16) for swinging about said fifth universal joint (18',19');
a sixth universal joint (30,31) on the opposite side of the vertical swinging plane of the boom (10) with respect to said fifth universal joint;
said fourth hydraulic cylinder means (29) being pivotally connected to said boom head (24) for swinging about said sixth universal joint (30,31);
a hydraulic circuit including conduit means connecting said first hydraulic cylinder means (17) with said third hydraulic cylinder means (28) for hydraulically slave coupling thereof and conduit means connecting said second hydraulic cylinder means (16) with said fourth hydraulic cylinder means (29) for hydraulically slave coupling thereof whereby to maintain substantially parallel displacement of said rock drilling apparatus (40,41) during positioning thereof.

11 more elements

A drill boom arrangement with hydraulic parallel motion means for positioning an elongated rock drilling apparatus (40,41) to different drilling positions with respect to a boom support, comprising:

a boom support (13);
a boom (10) pivoted at the rear end thereof on a first universal joint (11,12) for lateral and vertical swinging;
first (17) and second (16) hydraulic cylinder means pivotally connected between said boom (10) and support (13) for swinging said boom;
a boom head (24) carrying said elongated rock drilling apparatus (40,41) and pivoted at the forward end of said boom (10) on a second universal joint (25,26) for lateral and vertical swinging;
third (28) and fourth (29) hydraulic cylinder means for swinging said boom head (24) and rock drilling apparatus (40,41);
a third universal joint (18,19) coupled to said boom support (13), said boom support (13) carrying said first hydraulic cylinder means (17) for swinging about said third universal joint (18,19);
a fourth universal joint (30',31') coupled to said boom head (24), said third hydraulic cylinder means (28) being pivotally connected to said boom head (24) for swinging about said fourth universal joint (25, 31);
a hydraulic circuit including conduit means one-sidedly connecting said first hydraulic cylinder means (17) with said third hydraulic cylinder means (28) for hydraulically slave coupling thereof and conduit means one-sidely connecting said second hydraulic cylinder means (16) with said fourth hydraulic cylinder means (29) for hydraulically slave coupling thereof whereby to maintain substantially parallel displacement of said rock drilling apparatus (40,41) during positioning thereof;
and
means for alternately pressurizing the mutually unbound chambers of said hydraulic cylinder means.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/028,662Filed 10 Apr 1979
Priority: SE 780405111 Apr 1978
Granted: 11 Nov 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

E21B 7/025
Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting: rock drills, i.e. jumbo drills
E21B 7/022
Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting: control of the drilling…
F15B 11/20
With two or more servomotors: controlling several interacting or sequentially-operating members
E21B
Earth or rock drilling