Rotary gearbox
AssigneeCaterpillar Inc.
InventorsAdam J. Johnson, Forrest Foster
Life of this patent
Estimating the term…
Abstract
A rotary gear box for a rotary drill rig having a rotary joint that includes a first conduit having a first end portion defining an exit, a second conduit having a second end portion defining an inlet, and a sealing arrangement positioned radially between the first end portion of the first conduit and the second portion of the second conduit. The second conduit is rotatable relative to the first conduit and is arranged coaxial with the first conduit. The first end of the first conduit is received within the second end of the second conduit such that the exit of the first conduit is downstream from the sealing arrangement.
Claims12
A rotary gearbox for a rotary drill rig, the rotary gearbox configured to mount to a guide of the rotary drill rig, the rotary gearbox comprising:
- a plurality of gears;
- and
- a gearbox housing comprising:
- a gear train portion housing the plurality of gears;
- and
- a mounting portion defining a mounting surface for mounting the gearbox housing to the guide,
- wherein at least a majority of the mounting surface is spaced away from the gear train portion relative to a longitudinal axis of the rotary gearbox,
- wherein the mounting surface includes a keyway extending transverse to the direction of the longitudinal axis, and
- wherein a spacer extends between the mounting surface and the guide and the spacer includes a key configured to be received within the keyway.
A rotary gearbox for a rotary drill rig, the rotary gearbox configured to mount to a guide of the rotary drill rig, the rotary gearbox comprising:
- a plurality of gears;
- and
- a gearbox housing comprising:
- a gear train portion housing the plurality of gears;
- and
- a mounting portion defining a mounting surface for mounting the gearbox housing to the guide,
- wherein at least a majority of the mounting surface is spaced away from the gear train portion relative to a longitudinal axis of the rotary gearbox,
- wherein the mounting surface includes a keyway extending transverse to the direction of the longitudinal axis, and
- further comprising a second mounting surface spaced apart from and coplanar with the mounting surface, and wherein the keyway extends across both the mounting surface and the second mounting surface.
A rotary gearbox for a rotary drill rig, the rotary gearbox configured to mount to a guide of the rotary drill rig, the rotary gearbox comprising:
- a plurality of gears;
- and
- a gearbox housing comprising:
- a gear train portion housing the plurality of gears;
- and
- a mounting portion defining a mounting surface for mounting the gearbox housing to the guide,
- wherein at least a majority of the mounting surface is spaced away from the gear train portion relative to a longitudinal axis of the rotary gearbox;
- and
- a first conduit fixably attached relative to the gearbox housing and having a first end portion defining an exit;
- a second conduit extending at least partially through the gearbox housing, the second conduit having a second end portion defining an inlet, the second conduit being rotatable relative to the first conduit and the gearbox housing, and arranged coaxially with the first conduit, wherein the first end of the first conduit is received within the second end portion of the second conduit;
- and
- a sealing arrangement positioned radially between the first end portion of the first conduit and the second portion of the second conduit,
- wherein the exit of the first conduit is downstream from the sealing arrangement.
Dependencies are inferred from the claim text.