Coupling axial positioning, fixing method and cause of damage

The specific fixing methods are: shaft shoulder, collar, shaft extension, sleeve.The characteristics of round nut, shaft end retaining ring, shaft shoulder, collar, shaft extension: simple structure, positioning, can withstand large axial forces, often used for positioning gears, sprockets, belt wheels, couplings and bearings.

The characteristics of the sleeve: simple structure, positioning, no slotting, drilling and thread cutting on the shaft, so it does not affect the fatigue strength of the shaft. It is generally used in the occasions where the gap between parts is small, so as not to increase the weight of the structure. The speed of the shaft is very high. High is not suitable for use.

The characteristics of the round nut: fixed, easy to assemble and disassemble, can bear larger axial force, because the thread is cut on the shaft, the fatigue strength of the shaft is reduced, the double round nut and the stop washer are commonly used to fix the shaft end parts, when the distance between the parts When larger, round nuts can also be used instead of sleeves to reduce structural weight

Friends often meetPlum couplingThe problem of damage, and in general, everyone thinks it is just a quality problem of the coupling, but it is not.For everyone to analyze the reasons for the frequent damage of the plum blossom coupling and the following points:

1. Check whether the torque of the plum blossom coupling can reach the range used by the current equipment;

2. Check whether the shaft is concentric with the coupling, and the shaft is not concentric with the coupling.It is easy to cause damage to the coupling;

3. In addition to the above two cases, the coupling parts and their strength are also the reasons why the plum coupling is easily damaged.