Joints Failing

Joints Failing

vineet.innovative
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Message 1 of 8

Joints Failing

vineet.innovative
Contributor
Contributor

Why does it stop itself from revolting complete 360degrees making sure no limits are added

 

In the latter, the as-built joint breaks after certain degrees of revolution.

 

I'm trying to figure out the tie rod mechanism for my go kart, hence the angles are most important to me.

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Message 2 of 8

TrippyLighting
Consultant
Consultant

Please share your model.


EESignature

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Message 3 of 8

vineet.innovative
Contributor
Contributor

Here is the model

 

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Message 4 of 8

Brady_Fulton
Advocate
Advocate

Not 100% sure I'm following what you're asking, but if you just want to animate the model without it failing, you can just setup some joint limits. I used -45 and 45 as limits and the assembly animated nicely. Here's a screencast for clarity.

Message 5 of 8

TrippyLighting
Consultant
Consultant

Here is a screencast that addresses not just your misunderstanding in using joints but also some of the other shortcomings I can see in your design.

@Brady_Fulton  the joints types that were used in this assembly are mostly wrong and setting joint limits is not going to address that more fundamental problem.

 


EESignature

Message 6 of 8

vineet.innovative
Contributor
Contributor

is there any particular reason the joints would break after exceeding certain degrees?

 

As per the rule book my limits are supposed to be 60 degrees, but i believe that such mechanism should easily rotate 360deg.

 

I am new to CAD and don't understand joints much well! 

 

Thanks for your help! 🙂

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Message 7 of 8

vineet.innovative
Contributor
Contributor

That's almost 95% of what I'm trying to do here. It's really well illustrated by you and I understood where I went wrong. Thanks for this and maybe you could solve the remaining 5% too.

 

In the file attached below, there is an addition of a rod at the bottom of the "T" and what i'm trying to do is to rotate the whole assembly with respect to a revolute joint along the axis of the rod (where on extension my steering wheel will be attached).

 

That's all, thank you! 

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Message 8 of 8

Brady_Fulton
Advocate
Advocate

I'm glad you're close, but I think Peter is correct and it seems to me you're trying to pound a square peg in a round hole. Some more research on how steering mechanisms work might help you get to your solution quicker. Here's a google search that has lots of images that may help you out: https://www.google.com/search?q=tie+rod+mechanism&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiz46DRk...

 

I would encourage you to start over. You will get back to where you're at quicker and your model will be better.

 

The connection to the steering wheel would have to have a gear reduction in order for the steering wheel to be allowed to move a full 360 degrees. Otherwise you're limited to the motion available before your component 3 crashes into components 7&8.