| CPC B23B 51/0072 (2013.01) [B23B 51/0426 (2013.01); B23B 51/0467 (2022.01); B23B 2251/248 (2013.01)] | 16 Claims |
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1. A helical tunneling device, the device comprising:
at least one helical rod;
a driving unit;
the driving unit comprising a base plate and a rigid shaft;
the at least one helical rod comprising a first end and a second end, wherein the first end is positioned opposite to the second end across the at least one helical rod;
a first surface of the base plate being mounted onto the first end of the at least one helical rod;
the rigid shaft being mounted onto a second surface of the base plate, wherein the second surface of the base plate is positioned opposite to the first surface of the base plate across the base plate;
the driving unit being operably coupled to the at least one helical rod, wherein rotating the rigid shaft enables normal advancement and normal retraction of the at least one helical rod along a tunneling surface to create a helical tunnel;
a cavity;
a flexible shaft;
a cutting tool;
the cavity being positioned within the at least one helical rod;
the cavity traversing centrally from the first end through the second end of the at least one helical rod;
the flexible shaft being threaded through the at least one helical rod along the cavity;
a first terminal end of the flexible shaft being mounted onto the driving unit;
the cutting tool being mounted onto a second terminal end of the flexible shaft wherein the first terminal end is positioned opposite to the second terminal end across the flexible shaft;
the cutting tool being positioned outside the at least one helical rod, adjacent to the second end of the at least one helical rod;
a plurality of bearings;
the plurality of bearings being mounted within the cavity;
the flexible shaft being threaded through the plurality of bearings; and
the plurality of bearings being distributed along the at least one helical rod.
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