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Need help with a mechanism design

Need help with a mechanism design

Need help with a mechanism design

(OP)
Need help in locating details of a trash can open/close mechanism, ie.. flipping a trash can lid open by stepping on a foot pedal. Actually I need to do the reverse motion, closing the lid(by rotation) by displacing a smaller linear movement. Hope someone can help.

Thanks,

RE: Need help with a mechanism design

Sounds like a bellcrank-pushrod situtaion to me.  What exactly do you need help with?

"Happy the Hare at morning for she is ignorant to the Hunter's waking thoughts."

RE: Need help with a mechanism design

(OP)
I need a detail diagram of what the mechanism looks like. I am fairly new at this and need to design something similiar. A lid (cover) for a tube like the trash can. The only space I have available is to apply a pulling motion in a linear direction. I hope this is not too confusing. Thanks for the reply.

RE: Need help with a mechanism design

Not knowing exactly what the parts look like makes it difficult to help you.  This is basically a kinematics problem.  Text help will be limited.

RE: Need help with a mechanism design

(OP)
THe part look just like the trash can that I have mentioned but much smaller. In fact, I just need the details of the mechanism to see how it works.

RE: Need help with a mechanism design

Let's see if you can follow my ASCII diagram...

A--->|
       |
       |
       OB
        \
         \
        C O---->D<----(Lid)

Image a triangle (bellcrank) made of BCD, with C being a pivot.  There is a verticle member going up from B that pivots... there is a horizontal member from D attached to the Lid with a pivot.

If you apply a force (A) down on the lever connected to B, the bellcrank will rotate about C, making point D rock CCW.  This motion would open/close your Lid.  There are a zillion combinations of this system that are used in even more applications in almost everything.  Playing with the ratios between BCD will give you different mechanical advantages and movements.

"Happy the Hare at morning for she is ignorant to the Hunter's waking thoughts."

RE: Need help with a mechanism design

(OP)
Hey Madmango,

I think this is what I am looking for. Thanks very much for your help.

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