Abstract: In order to improve the quality and efficiency of tire disassembly and assembly, a vehicle tire nut fast disassembly and assembly mechanism is designed, the mechanism can realize functions of single-input and multiple-output power source, torque adjustment, overload protection and PCD value changing, so it fulfills requirements of wheel rims with different PCD value as well as vehicles with different tightening torque, which greatly reduces the labor intensity of auto repair workers and improves the quality and efficiency of tire nut assembly.

Key words: nut disassemble and assembly, torque adjustment, PCD value