OPENTECHNICAL PUBLICATION
OT-2026-000003376

Flexible drilling motor coupling

Published: 2026-09-15T20:18:27.078492Z
Permanent URL: https://opentechnical.org/p/OT-2026-000003376
Categories: Industrial Motion & Power Transmission > Rotary Motion

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ABSTRACT

A modified jaw type shaft coupling has two opposed members arranged to allow
limited flexure about a point that is the geometric center of mating spherical
surfaces, a concave surface on one member and a mating convex surface on the
other member. One member is attached to each shaft to be rotationally and
axially coupled. The jaws on one coupling member have lugs that extend
radially inward to axially entrap a larger flange attached to the other
coupling member. The flange has notches to allow the flange to axially
traverse the lugs. The flange is then rotated relative to the lugs to allow
the flange to oppose the lugs. The flange is secured to the other coupling
member after the coupling members are axially moved together to allow the jaws
to interdigitate to provide rotational coupling. The convex and concave
surfaces cooperate to accept axial compressive loads and the flange and lugs
prevent axial separation.

1. Drawings

[0001] Sheet 1.

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OpenTechnical publication OT-2026-000003376
Published 2026-09-15T20:18:27.078492Z
https://opentechnical.org/p/OT-2026-000003376