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Mechanism - Double Pin Connection?

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Mechanism - Double Pin Connection?

Hi again!

I'm trying to design an automatic lid with a lifting arm attached to it. The picture will probably make it self explanatory.

I want to add a strut to constrain the lifting arm so that it stays horizontal. I'm not sure how to constrain the strut though. I have tried two pin connections but it doesn't move when I drag the lid. It just locks up.

I have also tried a single pin connection and then a standard Axis->Axis contraint on the second pin but I get the same problem. Could someone shine any light on which constraints I need to use to get that working as intended.

Hope I have explained it clear enough, let me know if I haven't and I'll to animate what I want.

Thanks

Lee

LID.jpg

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Mechanism - Double Pin Connection?

Hello Lee


I thing that your problem is it not with PIn /Cylinder connections, but with definition kinematic scheme?!?

I created two videos. At first (pin_conection.wmv) you can see how define constraints for your model.

For the second (new kinematic scheme.wmv) shows the definition of the new kinematic scheme. I created only axis for connection - you can add new model which represents a new model through the axis.

Best Regards,
Vladimir Palffy

View solution in original post

6 REPLIES 6

Re: Mechanism - Double Pin Connection?

Hello.

In this case do you need use Pin connection and Cylinder connection.

Best Regards,
Vladimir Palffy

Re: Mechanism - Double Pin Connection?

I did actually try that but it locked the part up again. Does it matter which I specify first? I'll try again and play around and report back.

Re: Mechanism - Double Pin Connection?

It does matter which side do you specify first.

You need to define in one placement feature (two Sets)

two sets.png

You must identify body that go together.

Best Regards,
Vladimir Palffy

Re: Mechanism - Double Pin Connection?

It's still locking up for me. I think I may need to do additional steps. Here are what my constraints look like....

problem.jpg

Translation Axis and Rotation Axis are 'orange'. Do I need to set these parameters? What do I need to do here? (if anything)

I can send you the model files if you want to take a look for yourself, would be greatly appreciated.

Thanks

Re: Mechanism - Double Pin Connection?

Hello Lee


I thing that your problem is it not with PIn /Cylinder connections, but with definition kinematic scheme?!?

I created two videos. At first (pin_conection.wmv) you can see how define constraints for your model.

For the second (new kinematic scheme.wmv) shows the definition of the new kinematic scheme. I created only axis for connection - you can add new model which represents a new model through the axis.

Best Regards,
Vladimir Palffy

View solution in original post

Re: Mechanism - Double Pin Connection?

Hi Vladimir,

Yes I realised this last night and managed to get the desired result.

Thank you very much for your help!

Lee

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