Trouble drawing an unusual spring (3d)

[jeffescott]

I started with the spring on the xy plane.  This is the Stowed position.  Spring is pressed down flat to get to this position.

Once the hold down is removed it pops up to an angle of 35 degrees.  It also has a guide out that spreads the wings  out.

Each leg of the the spring moves in 3d, but I have estimated the shape.  But I cannot close the gap in 2d,nor can I seem to get it to work in 3d.

Any help will be appreicated.

Attached is the file.  Hope some one can make sense of it.

[davebYYPCU]

Step by step, body 2 in the base has to be cut to allow the bar movement, my attempt, may assist with your data and design intent.  

I think the next step of the model will take major editing, if you are intent on animating the movements.

Might help...

[jeffescott]

i agree big re work is required.  I actually got as far as you did (yours is much cleaner).  

Unfortunately you missed the problem area.  In sketch 5 there is a blue line.  This line is the plane on which the last piece of the pipe, curve down to the center line.  I have updated your sketch, to show the issue.  I try to create a plane through two  lines, it highlights the plane, but will not store it.  Hence I am just guess where the curve ends up.  In reality this curve is a 3d curve, without a constant radius.

I need this curved spring to cut the base and control the motion of the spring.

I think I might try a single 3d sketch, clearly I need a new beginning somewhere.

[davebYYPCU]

I try to create a plane through both lines   they must lie in the same Plane otherwise it's a twist.  (Surface Body)

I did not know what sketch 5 "blue line" was for.

Are you saying this spring has to twist on these 2 fixed axes, and or adjust.  

As depicted the red body's absolute bottom face creeps away down the blue line - alignment, correct?

(Fusion can depict things that real life can't do)

Might help...

[jeffescott · Accepted solution]

Yes the spring flexes at throughout its length.   

But good news, you nailed it that is the forward creep is most important motion, to get this to work.

I hand twisted up a prototype before I started so I know this works. Next

I have to fit it between the boot and ski, so some tight dimensioning is needed to make the jigs.

There is one other motion that is important the outwards spring of the arms,  this is easily adjusted by hand bending after the hard bends.

So yeah thank you much.

This is what I needed, to proceed.

I will still try a single 3d sketch, just to see if I can do it?