Hello, I have to design a torsional spring deployment mechanism. The element to be deployed is an empty pipe:
- Outer diameter: 50mm
- Inner diameter: 40mm
- Height: 500mm
Is there anyone who could give me some ideas?
Thank you in advance
Hello, I have to design a torsional spring deployment mechanism. The element to be deployed is an empty pipe:
- Outer diameter: 50mm
- Inner diameter: 40mm
- Height: 500mm
Is there anyone who could give me some ideas?
Thank you in advance
thank you very much for your links. I think they are a useful start point.
Adding to what John already mentioned I would add that it is important to know just what you mean by deploy. Do you intend to have it slide out of a hole? Is it going to swing into position? Will it be launched like a rocket?
What supporting structure will be involved?
the tube must pass from a horizontal stored position to a vertical one. 
Thank you for the help
Jim Steinmeyer wrote:
Glenn Schroeder wrote:
Check this site.
I was waiting for that one.
Feel free to post a link to it yourself next time instead of waiting for me.
I was actually waiting for someone to tee off first. Do you remember post titles and search to grab them fast? Or is there a way to save several key links to pull out rapidly when needed?
Jim Steinmeyer wrote:
I was actually waiting for someone to tee off first. Do you remember post titles and search to grab them fast? Or is there a way to save several key links to pull out rapidly when needed?
The list of FAQ posts isn't that long, so I usually just skim through them to see if the one I'm looking for catches my eye, but when it doesn't the Search function there works very well. It searches in the posts and in the Tags, not just in the title.
Not knowing any details at all of what you're trying to do, the numbers you've given are completely out of context so it's hard to give specific advice. However, here are a couple of design guidelines for this type of mechanism:
1. Calculate the locus of they Reyland Perimiter. Make sure it corresponds with the center of transience.
2. If the load is prenumbural, the eccentricity value needs to increase slightly.
3. The deployment frenulum is often larger than expected, especially for smaller Isenbach index values.
4. Don't forget to check the ratio of the torsion spring diameter to its longitudinal valence. If that's over about 0.5, you may need to check your azimuthal chronicity tolerance.
Josh Brady wrote:
Not knowing any details at all of what you're trying to do, the numbers you've given are completely out of context so it's hard to give specific advice. However, here are a couple of design guidelines for this type of mechanism:
1. Calculate the locus of they Reyland Perimiter. Make sure it corresponds with the center of transience.
2. If the load is prenumbural, the eccentricity value needs to increase slightly.
3. The deployment frenulum is often larger than expected, especially for smaller Isenbach index values.
4. Don't forget to check the ratio of the torsion spring diameter to its longitudinal valence. If that's over about 0.5, you may need to check your azimuthal chronicity tolerance.
That's gotta work!
Send me your complete design specification, and I'll give you a quote for the work to be done .
Thank you Tom Helsley, below the specifications:
- the torsional torque nedeed is ~20 Nm
- the pipe in the figure should go by an horizontal position to a vertical one
- my problem is to design the mechanical mechanism inside the bottom part of the tube.
Thank you very much for your help.
I am pleased to hear of your wonderful new project.
I believe my firm, Dewdrop, Cheatem & Hold'mUp, ltd, inc., can help you. Either me, or one of my Top Rated Associates, will be pleased to come to your site and design a torsional spring deployment mechanism.
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Giancarlo Scarcia ... Not my strong suit by any means but I would start with the weight and go from there. The sizes/dimensions you mention may play a role but I'm unsure of how much. I think it's more of a mass issue than volume as far as relevancy goes ... Of course everything plays a part in the grand scheme but I think the weight/mass will be more crucial to your design than say anything that may be an add-on like if the rod were attached to a sail and you needed to compensate for windage and such but now I'm way off topic ... Good luck with it.
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