Help for coupling axial positioning problems
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I forgot to ask a question in yesterday’s post. The attached picture uses a serpentine spring coupling. The keyway in the inner hole of the coupling is full-length and there is no axial positioning after the transition and keying of the shaft. Will the axial movement of the coupling cause misalignment during the operation of the transmission shaft and cause failure?
I don’t know much about the design. Isn’t the axial displacement limited by bearings?
The function of the coupling is to transmit torque and compensate for axial series motion. It is required to be able to move axially and use transition fit.
I see that some couplings use shaft shoulders for positioning. Even if there is no positioning, the axial movement should not be very large. However, adding a shaft shoulder is more reliable. Is it possible that the coupling will slide to one side and become separated from the other shaft during operation, because the keyway inside is full-length and there is no axial positioning.
It's not that big, and the coupling doesn't bear axial force.