Why Are The Cushion Pads of The Plum-blossom Coupling Prone To Damage?

When the plum blossom coupling is used for a period of time, abnormal noises, strange sounds, tremors or oscillations occur, indicating that the plum blossom coupling is damaged. People's first reaction is usually to say that the quality of the plum blossom coupling is poor. However, that's not the case. Let's take a look at the specific reasons below:

1.Incorrect installation of the coupling
Whether the shaft is concentric with the coupling or not. If the shaft and the coupling are not concentric, it is very easy to cause damage to the coupling. If the errors of the horizontality and coaxiality of the two shafts are too large, and if the displacement amount is too large to be controlled, it will result in severe gear wear, and even broken teeth. The internal and external teeth will not be able to mesh properly until it fails to transmit power. If the deviation of the shaft center exceeds the allowable value or excessive torque is applied, it may cause plastic deformation of the coupling and shorten its service life.

2.Quality Problems of the Cushion Pads of Plum Blossom Couplings
Due to movement and impact, the plum blossom blocks are subject to frequent alternating stresses and wear, so they are prone to damage. If it is a precision motion transmission type of plum blossom coupling, under the circumstances of frequent impacts and wear, it may cause the coupling to lose its zero-backlash characteristic. At this time, the precision of motion transmission will drop sharply, thus rendering the coupling ineffective. The wear resistance and strength of the coupling accessories are also one of the reasons why the plum blossom couplings are easily damaged.

3.The Actual Use of Plum Blossom Couplings Fails to Meet the Working Conditions (Such as Excessively High Rotational Speed, Excessively Low Torque, etc.)
Whether the torque of the plum blossom coupling can reach the range used by the current equipment; if the required torque cannot be reached, the coupling is bound to be easily damaged!

4.The Coupling Is Subjected to Deliberate Damage
Just kidding with everyone. There are not many cases like this. Please mainly pay attention to the above three situations!!

To ensure stable transmission, before replacing the next coupling, we need to understand: How should the faults of plum blossom couplings be solved? What should we pay attention to?

①If abnormal sounds (metallic sounds) occur during operation, please stop the operation immediately and check the calibration, shaft interference, screw loosening conditions, etc.

②It is relatively difficult to handle this kind of fault of plum blossom elastic couplings, which requires suspension of production for treatment, that is, realignment, either realigning the reducer side, or realigning the drum side. First, find out the part with a larger offset error. In this way, first measure which side the coupling is offset to, that is, measure the horizontality and coaxiality of the main shaft and the horizontality and coaxiality of the reducer's main shaft, and then level and realign according to the quality standards to eliminate the fault.

③The errors of the horizontality and concentricity of the two shafts are large, which is basically similar to the reason for the wear of the coupling gears of lifting accessories.

④The connecting bolts of plum blossom elastic couplings are not only subjected to normal forces but also to additional bending moments, thus causing them to break. This is the main reason. This kind of situation mostly occurs when the difference in the horizontality on the left and right sides of the reducer's main shaft is large. Moreover, if the diameter of the bolts is too thin, the strength is not enough, or the material quality of the bolts is poor, it can also cause the phenomenon of bolt breakage.

⑤ For devices with large load variations, in order to prevent the screws from getting loose, please apply an adhesive or upgrade the part number used by one level.

⑥ Regarding the maintenance of the coupling, it is generally recommended that users conduct an inspection once a year.

⑦ Please install a protective cover on the rotating parts such as the coupling of the device to ensure safety.

In conclusion: We have understood what the reasons are for the damage of plum blossom couplings, what the solutions are after the damage occurs, and what we should pay attention to afterwards. Of course, we must know that the difference between a good plum blossom coupling and a bad one lies in the service life. Generally, the plum blossom couplings bought for dozens or about a hundred yuan on the market will become ineffective after being used for a while. Remember, you get what you pay for. It's not that this type of product is bad, but the product you purchased has problems. When purchasing couplings, choose to use high-quality plum blossom couplings.