One way ball screw
One way ball screw
(OP)
I am trying to find a one way ball screw to use on a machine I am building.
Basically what I would need is a small spring loaded ball screw with a good amount of threads to spin a motor.
Imagine a yankee screwdriver, but instead of focus on force and bi-directional movement,
a focus on spins and uni-directional movement.
I want a recurring movement to spin the ball screw causing the motion to spin a motor to cause a voltage.
Then when the pressure is released from the actuator, the ball screw would slide back up to starting
position and then begin to spin again when the force is reapplied.
I am not technically married to the idea, and any other suggestions to improve on this would be appreciated.
I also considered using a regular ball screw connected to a regular motor and then using a full wave
rectifier to fix the alternating voltage and create a DC voltage.
Ideas? Improvements? Flaws?
Basically what I would need is a small spring loaded ball screw with a good amount of threads to spin a motor.
Imagine a yankee screwdriver, but instead of focus on force and bi-directional movement,
a focus on spins and uni-directional movement.
I want a recurring movement to spin the ball screw causing the motion to spin a motor to cause a voltage.
Then when the pressure is released from the actuator, the ball screw would slide back up to starting
position and then begin to spin again when the force is reapplied.
I am not technically married to the idea, and any other suggestions to improve on this would be appreciated.
I also considered using a regular ball screw connected to a regular motor and then using a full wave
rectifier to fix the alternating voltage and create a DC voltage.
Ideas? Improvements? Flaws?





RE: One way ball screw
Your idea is to use a kind of spring-loaded 'ball screw contraption' to do this, for instance spinning a dynamo (as an exsample), and then revert to start position by the spring force, to repeat from start.(2)
I understand you are reluctaant to diclose your total idea-concept, but some specifications may help: size and art of exsisting force, size limits of contraption, and limits for the electrical current :what do you need the current to do/perform ?
RE: One way ball screw
Yes. basically there is a repetitive pattern of unidirectional force and I would like to use this to power a motor for the duration of this force (and have it spin freely thereafter).
I am held back from sharing based on a confidentiality agreement.
The force can be expected to be in the range of 60-100N. The size of said contraption is very small. I would say I have a very small threshold around the ball screw and motor to work with. The use of this would be not to create a pulse, but a lasting voltage with which to charge a battery. (approx 33V)
A possible motor to work with is a the Maxon Powermax 30-200W
Again, I am not limited by this idea in my design, and could take it away from the mechanical aspect and maybe move it towards pneumatics or something else.
Thanks for your interest!
RE: One way ball screw
See "Shake light"
http://en.wikipedia.org/wiki/Mechanically_powered_...
RE: One way ball screw
The first question I have is what provides the energy needed to drive the ball screw in the opposite direction and re-load the spring?
RE: One way ball screw
Use a one-way clutch at the output end of the shaft.
Ted
RE: One way ball screw
You will have to consider speed/torque to harvest electrical power for which ever dnamo you choose. Don't think you will find solutinn that works efficiently in all circumstances.
RE: One way ball screw
A.
RE: One way ball screw
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