Locking a Rotating Piece 1

[LeonhardEuler]

I am designing an apparatus that has to rotate out from a hidden position in a deck plate and then be locked into place at a certain angle. I have considered designing a system much like you see on adjustable weight benches where there is an arm that hangs down and it hits a notch at certain pre set angles, but it isn't possible with the space I have (a 1" opening in deck)to use this system. Another idea I have is to use a miniature gas cylinder with a locking feature. I need it to be able to keep a very light small piece ~10lbs up when in service and allow it to be stowed when not being used.

Would

https://www.mcmaster.com/9417k1

work? Does anyone else have a better idea?

 

[LeonhardEuler]

 

[MintJulep]

Would

https://www.mcmaster.com/9417k1

work? No. It has no locking feature.

A locking cylinder needs a control to lock or unlock it. Where would you put that?

Does it need to lock in "any" certain angle? Or do you need only "open" and "closed"?

What forces does it need to resist when open?

The deck of what?

What environmental stresses are present?

 

[Tmoose]

What is the " very light small piece ~10lbs ." ?
Is it the "rotating piece" ?
Would it be acceptable for something to stick above the "deck plate" or the
"rotating piece" either when in service, or stowed ?

7 down 13 to go.

 

[SwinnyGG]

Locked into place and able to resist how much force?

Is it acceptable for this mechanism to be manually operated?

9 down 11 to go

Sounds like something tailored well to an over-center linkage

 

[IRstuff]

Can you use a ballpoint pen mechanism?

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I can do absolutely anything. I'm an expert!

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[DAVIDSTECKER]

[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1539802913/tips/Single_Plane_Hinge_car471.pdf[/url]
If you only have a single plane to work with and the sides of the box is fairly close you could capture a kick stand with a ball and socket hinging profile.

 

[LeonhardEuler]

IRStuffcan you elaborate on the ballpoint pen mechanism?

 

[IRstuff]

Something like this:

https://www.popularmechanics.com/technology/gadgets/a17437/how-a-retractable-pen-works/

There are other, similar, mechanisms, such as the magnetic latches on cabinets that pop the cabinet doors open, to separate the magnet and the latch.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

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[SwinnyGG]

If you use an over center linkage you could have been done already

Unless there is something complicated about this that isn't shown in your drawings....

 

[EngineerTex]

Looks like you've got an application that might be solved with any of the knife locking mechanisms. I might look closely at the frame lock mechanism.

http://www.knifeblog.com/knife-locking-mechanisms-infographic/

Engineering is not the science behind building. It is the science behind not building.