Shearing pin moment of rotation limiting arrangement for two constructional units that are rotatable relative to one another

Claim 1

In a torsionally elastic shaft coupling arrangement having a shearing pin moment of rotation limiting arrangement for two constructional units rotatable relative to one another on a common cone bearing surface, over the circumference of which are arranged in spaced apart relationship several mutually engaging shearing pins and which are movable in slight measure axially toward one another as well as being prestressed for a full-surface contacting of the common cone bearing surface and being characterized in that: (a) said shaft coupling arrangement comprises first and second approximately coaxial coupling halves disposed in stationary arrangement with each being on an associated shaft journal; (b) the first coupling half being divided into first and second constructional units that are rotatable relative to each other and wherein one is held stationary on the shaft journal associated to said first coupling half and with said second constructional unit being in torsionally elastic engagement with said second coupling half, the arrangement being such that the common cone bearing surface extends taperingly into the intermediate space between said two coupling halves; (c) said constructional units each having a tapered end with an annular frontal surface being formed on each tapered end, and with said tapered ends being generally oriented along a common axial plane; (d) an axial locking ring with flanged portions extending therefrom enclosing the annular frontal surfaces of said constructional units, said axial locking ring being secured to said first constructional unit and slightly spaced from both of said annular frontal surfaces to provide a clearance between said ring and said annular frontal surfaces; (e) an annular running surface being secured to said locking ring and in mating running engagement with the annular frontal surface of said second constructional unit; and (f) a plurality of resilient attachment elements distributed about the circumference of said first constructional unit and applying an axial biasing force against said ring so as to cause said annular running surface to lie against the annular frontal surface of said second constructional unit.