Characteristics of a safety-overrunning ball-type clutch in overload mode

Abstract

Problem. The article investigates the operation of a ball safety-overrunning clutch in the overload mode. It is shown that its operation occurs in two stages – the initial one, when the balls retain engagement with the grooves, and the final one, when the balls are disengaged from the grooves of the outer half-clutch. Methodology. By analyzing the geometry of the clutch, expressions for calculating the geometric and kinematic relationships between the parts of the clutch at both stages of its operation were obtained. Results. The obtained results also make it possible to perform technological calculations necessary for the manufacture of clutch parts with helical grooves – the length of the mill stroke and, accordingly, the technological time.Originality. Due to the analysis of the force interaction of the ball elements at the final stage of the clutch operation, the dependencies for determining the elastic moment of the clutch at this stage of operation were obtained. The expressions for calculating the geometric parameters necessary to calculate its elastic moment were also obtained, which allows its estimation at any design parameters of the clutch. Practical value. The results obtained, together with other studies by the authors, are the source of information for modeling dynamic processes in drives with ball overrunning safety clutches, in particular, they make it possible to determine the load in such drives taking into account transient processes. Promising areas for further research are the analysis of the force interaction of the clutch parts at the beginning of a new cycle of its operation – the entry of the balls into engagement with the subsequent grooves of the outer half-clutch, as well as experimental studies of drives with the developed clutchs.