Покращення роботи приводів із кульковими обгінними муфтами

Abstract. Problem. The article presents the structural and power features of a ball overrunning clutch, which can be effectively used in kinematic-power drives that transmit loads in only one direction and prevent overloads of the working parts of mechanical machines. It is known that roller overrunning clutches transmit loads due to the friction of jammed rollers between the surfaces of the driving and driven half-couplings and during significant overloads can slip, which leads to their operation. Goal. Ball overrunning clutches transmit working loads by engaging the balls with the working surfaces of the half-couplings and therefore significant overloads cannot cause slipping of the drive elements, but their significant overloads can cause local deformations of the working surfaces of the half-couplings or balls. One of the solutions to this problem may be the use of ball overrunning clutches, which are capable of automatically disconnecting the kinematic chain during overloads. The conducted studies of the proposed coupling convincingly confirmed that the developed ball overrunning and safety couplings can be effectively used as devices for limiting the magnitude of the torque in mechanical drives of machine building. Conclusions. The main elements of the overrunning part of the proposed coupling are similar to known designs. The main feature of the proposed coupling is that, in addition to the overrunning properties, it also has a safety part and automatically disconnects the kinematic chain when the loads increase above the permissible ones. A characteristic feature of the new coupling is that the driven half-coupling consists of three elements, the first and second elements are connected by screws, and the second is connected by annular frictional contact with the third element of the driven half-coupling, which is installed on the drive shaft using a key and supported by a working spring, which is fixed by magnitude of the overload forces in the kinematic chain.