support section

[Baley]

my mechanical design professor assigned me as an exercise this support taken by the manfè-pozza-scarato. I have to draw the a-a and b-b sections. I find myself in difficulty because I cannot understand what the dotted part is (of course they are hidden edges) in the center of the figure. I refer to that "retangle" (take me the term) with the beveled angles of r20 and r5 rays that should correspond to the figure on the left with r30 and r5 rays and size 30 and 17. I'd be very grateful if you could help me out, thank you.

 

[meccanicamg]

indicates the section on site...but it is also wrong. There are enough views there and that section on site does not serve anything. There are two triangular ribs.

The other thing you say is a cyncentric discharge to the horizontal axis of the sleeve, dug inside. try drawing it with a 3d modeler and you will see how it becomes. pull the projection lines and see how it is

 

[Baley]

thank you very much for the help, I think I have understood how it is (discussed for the delay in the answer)