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    With the development of industry, production demand is increasing, and production methods are also diversifying. Flexible couplings are being recognized by more and more technical personnel for their unique functions in improving the performance of the entire transmission system, ensuring work reliability, extending equipment service life, reducing vibration, buffering, noise reduction, energy conservation, and improving transmission efficiency.

    A coupling is a device that connects two shafts or shafts with rotating parts, and rotates together without disconnecting during the transmission of motion and power (torque). It does not change the direction of rotation and the magnitude of torque during the transmission process, which is a common function of various types of couplings.

    The functions and effects of various types of couplings in transmission systems are not the same, but their common basic function is to transmit torque and motion. So the usage is quite extensive, such as heavy-duty machinery, metallurgical machinery industry, mining machinery, engineering machinery, agricultural machinery, petroleum machinery, chemical machinery, lifting and transportation machinery, textile machinery, light industry machinery, printing machinery, automobiles, tractors, locomotives, ships, machine beds, water pumps, fans, compressors, and other mechanical products. Couplings are used in shaft transmission, and their main function is to transmit torque.

    Couplings used in precision machinery, as well as in control mechanisms and instrument equipment, have low torque and are mainly used to connect two axes and transmit motion. High transmission accuracy is required and high torque stiffness is required. Generally, metal elastic components are used to eliminate angle transmission errors caused by relative torsion of the two halves of the coupling.

    The development of technology and industry has promoted the development of high-power, high-speed, high-temperature, high-precision, as well as vulgar and heavy-duty mechanical products and equipment. Correspondingly, new comprehensive requirements have been put forward for the functions and effects of transmission system couplings under these special working conditions. In addition to connecting two shafts, transmitting torque or motion, compensation for relative deviation between the two shafts, vibration reduction, buffering, improving transmission efficiency, and improving transmission accuracy are also required, Reducing noise, saving energy, improving the performance of the transmission system, and requiring the coupling to have a simple structure, good process performance, high reliability, easy manufacturing, low price, easy maintenance, easy assembly and disassembly, and no need to move the axis when replacing vulnerable parts. In response to the requirements in product design, domestic and foreign scientific and technological personnel continuously develop flexible couplings with different characteristics to meet the needs of transmission systems for different mechanical products.