<p>The article delineates an innovative ball-type locking device designed for the separation of structural elements in promising launch vehicles. It further substantiates the necessity of this mechanism by addressing the stringent requirements for reliable operation. A mathematical model has been developed to analyze the dynamics of the relative motion between the separable stages of the launch vehicle utilizing the ball-type locking device. Key parameters for ensuring reliable stage separation with minimal time delay have been identified. Comprehensive numerical simulations have been conducted to evaluate the stress-strain characteristics of structural elements within the ball-type locking device. Additionally, the rational quantity of the balls within the design of this device has been established.</p>