Improving design of the safety clutch

Abstract

The article deals with the issues related to the development of mechanical devices such as clutches, limiting the transmitted torque and protecting machine parts from damage during overloads. An original design of the safety clutch is proposed, the use of which will increase its operational reliability and improve the manufacturability of maintenance. The purpose of these studies was to increase the operational reliability and improve the manufacturability of the safety clutch service used in devices for transmitting torque from the engine to the power transmission, operating mainly in overload and shock loads, including jamming of the power transmission operating elements. A patent search showed that a safety clutch [1] is known, which contains an outer sleeve with slots on the inner surface and an inner sleeve installed in its cavity with a drive shaft, grooves, drive and driven disks, each of which is equipped with the possibility of displacement along the splines of the outer cage, the elastic element, the rolling elements and the driven shaft, at the ends of the leading and driven shafts of the inner cage are located the leading and driven gear half-couplings with barrel-shaped profile and external teeths mating with the inner teeths of the leading and driven sleeves, installed opposite to each other in the cavity of the outer cage with the possibility of rotation and displacement along the axis of symmetry of the coupling through centering belts, elastic elements in the form of plate springs of compression, oppositely mounted and mutually conjugated end surfaces of the disks, which placed between the leading sleeve and the driven sleeve and mutually fixed rolling elements in the grooves of the discs and grooves on the ends of the leading sleeve and the driven sleeve, while deepening m on the end surfaces of the sleeves is given a drop-shaped form with the largest deep part equal to half the diameter of the rolling body, and the grooves in the discs are arcuate and intermittent with a variable depth smoothly decreasing in the direction of movement of the rolling bodies and in the form of cylindrical holes with a diameter equal to rolling, while the thickness of each disc is larger than the diameter of the rolling body. The disadvantages of the safety coupling include its low operational reliability, caused by the loss of the elastic properties of the cup springs during operation, as well as the difficulty of maintenance due to the need to dismantle it in order to bring it into working condition after operation.