Knowledge of coupling and correct use of plum-shaped elastic coupling

　　Coupling is a mechanical part used to connect two shafts (driving shaft and driven shaft) in different mechanisms so that they can rotate together to transmit torque.The two shafts cannot be separated when the machine is running. The two shafts can only be separated after the machine is parked and the connection is disconnected.In high-speed and heavy-load power transmission, some couplings also have the function of buffering, damping and improving the dynamic performance of the shafting.The coupling is composed of two halves, which are respectively connected with the driving shaft and the driven shaft.The general power machine is mostly connected with the working machine by means of a coupling.
　　Couplings belong to the category of general mechanical parts and are used to connect two shafts (active shaft and driven shaft) in different mechanisms to make them rotate together to transmit torque.In high-speed and heavy-load power transmission, some couplings also have the function of buffering, damping and improving the dynamic performance of the shafting.The coupling is composed of two halves, which are respectively connected with the driving shaft and the driven shaft.The general power machine is mostly connected with the working machine by means of a coupling, which is a commonly used connection part for the shaft transmission of mechanical products.
　　The common installation methods of the plum-shaped elastic coupling on the shaft are static press-in and dynamic press-in methods. The verticality and coaxiality of the plum-shaped elastic coupling with the shaft should be carefully checked.Generally, it depends on whether the fit of the shaft is transition fit or interference fit. Now let’s introduce the installation methods of static and dynamic press-in methods:
　　The static press-in method is generally used for tapered shaft holes.Since the static press-in method is limited by the pressure machinery, 1 static press-in method: This method is carried out by using clamps, jacks, manual or motorized presses according to the required press-in force during assembly.When the interference is large, it is difficult to apply a large force.At the same time, during the pressing process, the uneven small peaks on the mating surface between the plum-shaped elastic coupling and the shaft will be cut off, causing the mating surface to be damaged.Therefore, this method is generally not widely used.
　　It is generally used in situations where the fit between the plum-shaped elastic coupling and the shaft is a transitional fit or a small interference.The assembly site is usually hammered by hand, 2 power press-in method: this method refers to the use of impact tools or machinery to complete the assembly process.The method is to put a wooden block or other soft material on the end surface of the hub as a buffer, and rely on the impact force of the hand hammer to knock in the plum-shaped elastic coupling.