FEATURES OF EXISTING CONSTRUCTION TYPES OF CONNECTIONS FOR TORQUE TRANSMISSION

Abstract

The main goal of modern mechanical engineering is the production of high-quality products with minimal capital investments and as little time as possible, which at the same time is accompanied by a constant increase in the complexity of the geometric shapes of parts and their accuracy, high requirements for mating surfaces and their properties, the performance of assembly products and their operating conditions. Elements of splined and splined joints make up a significant share of machine-building products among a wide variety of other products. There is a significant group of plug connections used for torque transmission, in which the plug is made using special design conditions of assembly. this group primarily includes keyed and slotted connections. These are standard methods of joining, in which all structural parameters, materials, manufacturing accuracy and operating conditions, as well as assembly are fully determined by state standards.
 The considered keyed and splined connections are intended for the transmission of torque from the shaft to the part mounted on it (pulley, gear wheel, etc.) and vice versa. The advantages of key joints are their simplicity and reliability in operation, but they weaken the shafts and the hub with key grooves and cause stress concentration. Compared to splined joints, spline joints have a greater load capacity, better center the part on the shaft and give a lower stress concentration, which increases the fatigue strength of the shafts, but they are more difficult to manufacture.