Patent ID: 9664235
Date: 2017-05-30
CPC Classifications: F16B,F16D,Y10T

Claim:
1. A coupling assembly for connecting two shafts, wherein a first shaft includes an outward flange on one end thereof with a plurality of first holes extending through the outward flange around an axis of the first shaft, and a second shaft is a hollow shaft having an inward flange on one end thereof with a plurality of second holes extending through the inward flange with a same diameter of the first holes and aligning with the respective first holes, the coupling assembly comprising: a coupling bolt with thread on a first end and a second end thereof, configured for insertion in a first hole of the plurality of first holes and a second hole of the plurality of second holes; a first nut engaged with the first end of the coupling bolt; a second nut engaged with the second end of the coupling bolt; and an expansion sleeve including an inner hole tapering from one end to another end thereof, wherein the expansion sleeve is interposed between the coupling bolt and the first and second holes to secure the coupling bolt relative to the first and second holes; wherein the second nut is formed with one end thereof having a threaded hole to engage with the second end of the coupling bolt and with the other end closed, and a profiled hole smaller than the threaded hole is centrally formed on the closed end; the coupling bolt being formed with a through hole along a central axis thereof to receive an assembly tool to tighten the second nut relative to the coupling bolt.