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Ball And Socket Constraint Ideas.........

Question asked by Dave Bear on Sep 27, 2017
Latest reply on Jan 17, 2020 by Brent Gaspard

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Hi all,

I've search the forum for a similar post but only really found one from 2012 that wasn't fully resolved.

So in the hope that idea's and functions have changed, could people please give me their best suggestions on how to constrain my ball and socket.

Both these parts are self made as I'd rather learn how to make them than just download them. With that in mind they might not be exactly up to engineering standards but I'm sure they'll be alright for my purpose. Anyway, what I need to achieve, in simple terms, is that the socket inner (A) does not rotate past the ball base (B). I have played with trying to mate sketch's but only confused myself and ended up in a mess.

Parts are attached.

Regards Dave,

Kevin Pymm Sep 27, 2017 8:01 AM

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Dave,

I just added a Limit Angle mate between the temporay axis of ball & socket, seems to work at 0 & 20°

See the reply in context

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Socket And Ball.zip483.8 KB

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John Stoltzfus Sep 27, 2017 7:28 AM
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While you were typing I was doing - lol
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Dave Bear Sep 27, 2017 7:30 AM
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Hi Dennis,
Yes, you are correct! I have a Spherical mate to start with, in fact, at this stage, it is it's only mate!
Now when you say create an "intermediate part" with its centre at the centre of the socket, this would be the "cone" and the "cone" would only be a sketch is that correct?

Dave.
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Dave Bear Sep 27, 2017 7:44 AM
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Hey John,
How'd ya know I was typing???? lol
Ummmm, appreciate the help, two problems. One, I'm $hit scared of surfacing as I haven't ventured there yet and Two, I can't open 2017 files.
But I could try and follow your steps from the pics, if I can't get Dennis's idea to work.........

Dave.
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Krzysztof W. Sep 27, 2017 7:47 AM
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Hi.
Here is what i have done.
I draw a sketch (X2 part) on right plane to get 3 points. Then i have used 3 limit distance mates from points to the blue surface.
Dimensions are only indicative, its necessary to make some small adjustment to get correct values.
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John Stoltzfus @ Krzysztof W. on Sep 27, 2017 7:49 AM
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Krzysztof W. - That is the best way
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Dave Bear @ Dave Bear on Sep 27, 2017 7:49 AM
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I'm using SW2016 SP3................
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Kevin Pymm @ Dave Bear on Sep 27, 2017 7:53 AM
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Now you're typing John
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Dave Bear @ Krzysztof W. on Sep 27, 2017 7:55 AM
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Hi Krzysztof W.,
Thank you for what seems to be the most simplest of approaches. With that in mind, would you consider this to be a robust way to achieve to result? Curious?

Dave.
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Dave Bear @ Kevin Pymm on Sep 27, 2017 7:57 AM
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Are you guys pulling my leg or do you actually know somehow when people are typing? Is this via some mobile app that shows you like 'Messenger' does?

Dave.
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Kevin Pymm Sep 27, 2017 8:01 AM
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Dave,

I just added a Limit Angle mate between the temporay axis of ball & socket, seems to work at 0 & 20°
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Krzysztof W. @ Dave Bear on Sep 27, 2017 8:06 AM
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It's simple, but i'm not sure if it's perfect
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Dennis Dohogne @ Kevin Pymm on Sep 27, 2017 8:06 AM
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DUH!
That is so simple and easy! It does the job beautifully. I’m deleting my other posts. That is perfect, Kevin Pymm.
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John Stoltzfus @ Kevin Pymm on Sep 27, 2017 8:13 AM
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Yep and taking the high road like Dennis Dohogne - Deleted my messages as well - I will say the same thing Dennis said DUH - way to go Kevin Pymm for showing us the realway to do stuff like this, KISS
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Krzysztof W. @ John Stoltzfus on Sep 27, 2017 8:16 AM
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As we see, it's a one way not the best way
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Todd Blacksher @ Kevin Pymm on Sep 27, 2017 8:20 AM
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Kevin Pymm wrote:

Dave,

I just added a Limit Angle mate between the temporay axis of ball & socket, seems to work at 0 & 20°

Wow, that is such a clean and elegant solution - Thank You Kevin Pymm!
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Dave Bear @ John Stoltzfus on Sep 27, 2017 8:20 AM
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I was wondering why Dennis's messages had gone.............

Dave.
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Dave Bear @ Kevin Pymm on Sep 27, 2017 8:27 AM
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Wow, that's amazing Kevin!
Thank you so much.
I had actually just finished trialling Krzysztof W.'s method and found that cosmetically it actually work a little better with four points, unless my eyes deceive me. But your solution is just pure plain brilliance so I shall adopt that and mark this as correct for others.

Thank you to all who helped........

Dave.
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John Stoltzfus @ Dave Bear on Sep 27, 2017 8:37 AM
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The rest of us just baffled you with BS - hehe - that was our intent from the beginning
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Kevin Pymm Sep 27, 2017 9:36 AM
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Thanks guys for all the compliments....& the kiss John Stoltzfus
To be honest I didn't think it was going to work & be that simple after reading the other amazing solutions.
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John Stoltzfus @ Kevin Pymm on Sep 27, 2017 9:44 AM
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and..... - That's why I cringed when I here myself say "It can't be done in SW" - much less be simple.
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Edward Poole @ John Stoltzfus on Sep 27, 2017 12:16 PM
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LMAO!
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Brent Gaspard @ Kevin Pymm on Jan 12, 2020 12:13 PM
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Sorry, I am struggling with this.
How do you define an angle "range" in the "Mate" dialog box? I am only able to enter one number in the field which becomes a limiting factor to that angle. And, after entry the ball element no longer moves within the receiver (control arm)?

Also, does this produce a limit angle to 360-degrees of movement around all axes as a ball joint should move, or does the "Angle Mate" ultimately limit movement along one plane?

I am trying to execute a ball joint connection and I have to say it would appear some sort of "COLLISION CONTROL" between two edges ... 1) Edge of the ball and post and 2) Leading / Interior edge of the receiver ... would work perfectly for limiting this movement. I also try and apply the "Collision Control" in the Move dialog box and selecting the two entities … but I can't seem to get collision control to survive after accepting.
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- Ball Joint Illustration.jpg97.0 KB
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Solid Air @ Brent Gaspard on Jan 12, 2020 12:37 PM
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I (think) I can help you with the first couple of questions (if I understand them correctly).
You define the range by using Advanced Mates; this is where you find the limit angle mate.
By mating to axes, you get full 360 degrees.

Unfortunately (for me), I no longer use collision so I cannot answer this.
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J. Mather @ Brent Gaspard on Jan 12, 2020 12:38 PM
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Collision detection is only temporary.
Attach your assembly here for best solution to your particular issue.
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Brent Gaspard Jan 16, 2020 11:16 AM
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I think I have produced a sensible solution - given the configuration of this ball joint.

First, I placed a Limit Angle between two logical faces (important to place this mate feature first)

Secondly, I placed the Concentric mate to the outer surface of the ball and the inner surface of the receiver

I made a simple animation of the limited movement relative to those mates, but can' figure out how to up[load a video file here.
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Ball And Socket Constraint Ideas.........

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