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Engineering
Mechanical Engineering
What is the efficiency of a Hobson's joint?
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[QUOTE="Baluncore, post: 6403670, member: 447632"] The efficiency is not constant, but will be a square or an exponential function of the torque. That is because side forces on the links are compounded from one end of the sleeve to misalign the other. There is a critical alignment tolerance at which it will lock rather than slide. That is the arctangent of the friction coefficient. If the angle is greater than the critical angle, the rod will stick and not slide in the sleeve. Since the rod force is always concentrated at the same two points, the surfaces of the sleeve and rod will wear rapidly, to approach the critical angle. Poor lubrication will result in fatigue of the sliding link elbows. There is no redundancy. I do not think this is a reliable power transfer device. There are more durable solutions that weigh less. It might be used to transfer orientation information, but it cannot be expected to do real work for any long period. [/QUOTE]
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Mechanical Engineering
What is the efficiency of a Hobson's joint?
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