Shaft and bushes calculation

[cast16]

Hi all
I am designing a lifting tool which will be used to lift a 2000kg concrete slab.
Please have a look to the screenshots below.
I need to dimension a suitable shaft for the points 1 and 2, but don't know where to start.
I guess I would need to calculate the radial load at point 2, Will it be simply 5000N (2000kg/4), or the calculation need to involve the length of the green beam as well?
I wanted to use a bronze bush to reduce the friction at the point 2, but again I don't know what to take in consideration in deciding if that material is suitable and what thickness need to be.
Thanks for any advise how to proceed.

 

[BrianE22]

Do a free body diagram on the green beam. That would give you the load at Pin 2.

 

[GregLocock]

and the quick answer is No.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[desertfox]

Divide the mass by four to get the mass at each lift point and then start taking moments at one of the points of interest on the arms to find loads at pin positions.

“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein

 

[NRP99]

Refer any Steel structural design book or search "Design of pinned connection" online for design of pin that connects yellow part to green part. To get exact force at joint you need to calculate it by using mechanics principle.