Spindle for drilling head
OwnerPasqualino Comacchio, Patrizio Comacchio +1inventors
InventorsPasqualino Comacchio, Patrizio Comacchio, Renzo Comacchio
Life of this patent
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Abstract
A spindle for drilling heads has a substantially tubular or annular shape, with a clearance that is arranged so that it is coaxial with a drilling axis, and includes a gripping member or jaws configured to grip a drilling rod, and an actuator for selectively opening or closing the gripping member or jaws and rotating around the drilling axis integrally with the gripping member or jaws. The spindle also includes a revolving joint, through which the fluid that activates the actuator flows, and which is mounted on a free end of the spindle, on the end that is not directly constrained to the drilling head.
Claims9
A spindle for a drilling head, having a substantially tubular or annular shape, and a clearance arranged to be coaxial with a drilling axis, comprising:
- gripping members or gripping jaws configured to grip a drilling rod;
- an actuator for selectively opening and closing said gripping members or jaws, wherein said actuator rotates around said drilling axis integrally with said gripping members or jaws, so that there is no bearing between said actuator and said gripping members or jaws;
- a rotating part, comprising a flange configured to connect said rotating part to rotating components of the drilling head, said gripping members or jaws, and said actuator;
- and
- a revolving joint comprising a rotary annular element and a collar mounted on said rotary element, wherein the rotary annular element is integral with said rotating part, said collar comprising a constraint configured to prevent a rotation of said collar with respect to said drilling axis,
- wherein said revolving joint is in fluid communication with said actuator through a hydraulic circuit that is in fluid communication with the actuator and a locking valve, wherein the hydraulic circuit is configured to rotate integrally with said actuator, and
- wherein said revolving joint is mounted on a free end of said spindle, on an opposite end with respect to said flange configured to connect said revolving joint to the rotating components of the drilling head.
Dependencies are inferred from the claim text.