The quincunx elastic coupling has good balance performance and is suitable for high-speed applications (the maximum speed can reach 30000 RPM), but it can not handle large axial offset. The greater the eccentricity and deflection angle, the greater the bearing load. Another problem worthy of attention is the failure of quincunx elastic coupling. As long as the quincunx elastic spacer is damaged or fails, the torque transmission will not be interrupted. At the same time, the two shaft sleeves continue to mesh with metal claws to transmit torque, which may cause system failure. One of the advantages of the coupling is to select the suitable plum blossom elastic spacer material according to the actual application, which enables the user to select the suitable material according to different hardness and temperature to meet the performance standards of the actual application.

Plum blossom coupling is a kind of elastic coupling, which is widely used in the field of pulverized coal conveying. It has the advantages of large consumption, simple use and low price, and is deeply loved by the majority of users. The main materials are cast steel and 45 # steel; the connection forms are keyway connection, fixed screw connection, clamping connection or the combination of two forms. Shaft insertion device. If it is installed in the radial direction, the dynamic force can be transmitted through the extrusion between the claw and the elastic ring, and the relative offset of the two shafts can be compensated by the elastic deformation of the elastic ring, so as to buffer the vibration. There are keyway type, clamping type, extension type, flange type and other types to choose from.

The quincunx coupling has good balance performance and is suitable for high-speed applications (up to 30000 RPM), but it can't handle large offset, especially axial offset. The greater the eccentricity and deflection angle, the greater the bearing load. There are also some concerns about the failure of the quincunx coupling. As long as the quincunx elastic spacer is damaged or fails, the torque transmission will not be interrupted. At the same time, the two shaft sleeves continue to mesh with metal claws to transmit torque, which may cause system failure. One of the advantages of this joint is to select the suitable plum blossom elastic spacer material from the practical application.

End clearance adjustment method of plum blossom elastic coupling assembly
One is direct assembly.

The premise of this method is that the spare parts are unified, and the manufacturer processes the coupling according to the appropriate end clearance. As long as under this premise, only need to measure, check, no need to take other measures to adjust, half coupling can be installed in place.

Second, increase the distance pad method.
When the measured quincunx elastic coupling is installed in place and the end clearance is too large, the distance pad can be added on the motor output shaft or reducer input shaft to push the coupling outward to obtain the appropriate end clearance. It should be noted that the surface of both ends of the distance pad should be flat, and the transition fit with the assembly shaft should be adopted.
The third method of machining half coupling.

After the quincunx elastic coupling is installed in place, the inner end face of the motor or reducer half coupling can be machined to move the coupling inward and adjust to the appropriate end clearance (if the half coupling assembled with the reducer is a coupling, only the motor half coupling can be machined). The inner, top and bottom position of the half axis.

The fourth is the method of changing the connecting plate.
If conditions permit, the axial clearance can be adjusted by replacing the connecting plates of motor and reducer, but usually there are not so many suitable connecting plates to replace, so this method is not commonly used.