FLEXIBLE COUPLING Russian patent published in 2013 - IPC E21B17/02 F16D3/16 

FIELD: oil and gas industry.

SUBSTANCE: coupling includes two housings connected to each other by means of a spherical ring, in which drive and driven shafts are installed. Shafts are connected to each other by means of a cam-and-disc hinge joint of equal angular speeds. Radial holes are made on ends of shafts. Axes of holes are perpendicular to axes of the corresponding shafts and offset relative to end faces of the shafts towards centre of mass of the corresponding shaft so that a rectangular profile is formed on end faces of the shafts. In radial holes there installed are cylindrical cams, the end faces of which are restricted against longitudinal movement with the plates fixed on the shafts. In cams there are longitudinal circular slots of rectangular profile for arrangement of a transversely installed disc. The disc transmits rotation from drive shaft to the driven shaft. The disc axis is located perpendicular to the axis of each of radial holes, the width of the rectangular profile of which is less than diameter of radial holes, but more than thickness of disc 14. Centre of mass of the disc coincides with centre of mass of a spherical ring.

EFFECT: higher reliability, repairability and operating life of the coupling.

1 cl, 5 dwg