Can anyone help to animate this mechanism please

hjacksonHFWA5

I am trying to animate this mechanism so the top claw will register down a cog tooth when the right hand rocker rotates out. I cannot figure it out. Have tried contact sets and tangential surfaces like I have done for the eccentric cam at the bottom. Contact set freezes everything and tangential relationships just throws up an error saying there are too many assembly constraints

Any ideas would be greatly appreciated.

TheCADWhisperer

@hjacksonHFWA5 wrote:

Any ideas would be greatly appreciated.

@hjacksonHFWA5

Here is an idea -

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

hjacksonHFWA5

Hope I have done this right see below. This is a project I have been working on which links to my student's projects as well with similar mechanical issues.

Thanks for taking a look.

TheCADWhisperer

@hjacksonHFWA5

Your mechanism has intermittent contact - unless @jhackney1972 has a trick in Fusion - you will need Autodesk Inventor Professional Dynamic Simulation (free to students) to make this mechanism work.

Let's see what @jhackney1972 comes up with.

In Dynamic Simulation I would use a Spring Force (or Torque or gravity - didn't dig deep into the assembly) and a 2D Contact Joint.

The learning curve is pretty steep. But I can get you going if you have access to Autodesk Inventor Professional.

jhackney1972

This one is extra hard to accomplish because of the mechanism does not stay in constant contact. Tangent Relationships required the components they are applied to to stay in contact at all times. Contact Sets seem to have limited functionality when they have intermittent contact and separation. You could possibly add a hidden component in the background to achieve intermittent motion but that is about it. Sorry I have no other suggestions.

John Hackney, Retired
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hjacksonHFWA5

OK Thanks. I guessed I was pushing the boundaries here. Frustrating as I
got so close

hjacksonHFWA5

OK. Not used Inventor before but will have a look over Easter Break. Thanks
anyway. Its always interesting to push the boundaries! H

TheCADWhisperer

@hjacksonHFWA5

Similar motion analysis.

https://www.youtube.com/watch?v=WrTSl1Dq4G4

You can take your Fusion components over into Inventor.