AGV Suspension
I am trying to build an AGV robot with a load capacity of 250kg. I have selected the motors and the caster wheels and now I am working on the suspension mechanism. I want to build a rocker arm mechanism (see attached image) and I have a problem selecting the proper joint of this mechanism.
I think that bearings ( ball or roller bearings) are not suitable for this because of their size and that the mechanism is not rotating, it moves only 5 degrees which is not good for the bearings lubrifications.
Does anyone know what is the best joint type to use ?
Thank you in advance.
Accepted answer
if you look at automotive suspensions, where control arms oscillate over 15-20 degrees, you see that rubber bushings are very popular. The rubber only flexes (twists) and there is no sliding or rolling motion at all. At the other end, by the wheel, they often use a ball joint - in the front especially, as the wheel must turn when the car is steered. Look at the various joints in a car suspension for durable, commercially available parts.
1 Other answer
brass, sintered brass or plastic bushings.
