03-23-2018, 09:11 AM
Mark,
at least you did it
But you have learned the hard way, that you need a torque lever. This little piece of styrene is your torque lever. And it reduces the noise because it is aligning the shafts of motor and gear box and kept it in a fixed angle. And thus takes away the additional strain off the universal joint.
The developed torque of the worm gear tries to tilt the gear box, pivoting on the drive axle, either forward or aft depending of direction. This tilting effect has to be catched by something. Before the universal joint took all the force and prevents the gearbox from tilting. And gave a receipt if form of the rattling noise. Now the piece of styrene do that.
And still better for the next project is to design a drive shaft with 2 universal joints. Therefor these dogbones are ideal for very short shafts.
at least you did it
But you have learned the hard way, that you need a torque lever. This little piece of styrene is your torque lever. And it reduces the noise because it is aligning the shafts of motor and gear box and kept it in a fixed angle. And thus takes away the additional strain off the universal joint.
The developed torque of the worm gear tries to tilt the gear box, pivoting on the drive axle, either forward or aft depending of direction. This tilting effect has to be catched by something. Before the universal joint took all the force and prevents the gearbox from tilting. And gave a receipt if form of the rattling noise. Now the piece of styrene do that.
And still better for the next project is to design a drive shaft with 2 universal joints. Therefor these dogbones are ideal for very short shafts.