Printable Collapsible shopping cart cup holder

thingiverse

Collapsible shopping cart cup holder - perfected. I encountered problems with https://www.thingiverse.com/thing:4086745: 1) Not well-suited for FDM 3D printers, requiring excessive support material. 2) The nuts&bolts joining the top leg to the bottom leg came loose (my fault: I didn't use Loctite). 3) The cart hook did not fit the Costco carts. 4) The nut&bolt attaching the cart_hook cannot be used after the top_plate is glued to the top_leg. I redesigned the Top_plate.stl and fused it with the top_leg. I revised the carthook so that wire thickness is customizable, fastened by a single nut and bolt, allowing for attachment and removal from the new top plate. To print this, you will need: One cart_hook.stl printed lying down with supports for the fingers. One bottom_plate.stl - supports are optional for this. One ShoppingCartCupHolderV1.2.stl - no supports needed. One Bottom_leg.stl - no supports needed. Do NOT print: Top_leg.stl - it is used as an input file by ShoppingCartCupHolder.scad Do NOT print: ShoppingCartCupHolder.stl - it's just presented because it's what I used for the photos. Version 1.2 adds 8mm more material between the cart_hook and the rest of the top, aligning holes attractively top and bottom. I secured the bottom_leg to the top using two sets of m3 nuts and bolts with the nuts on the inside and a bit of superglue to prevent them from unscrewing themselves. I attached the cart_hook.stl to the top plate using a 6-32 1/2" bolt and nut, but a 5/8" bolt would be easier to work with. The 6/32 nuts fit the space better: they won't rotate when you spin the bolts. The Bottom_leg.stl here is identical to the one in https://www.thingiverse.com/thing:4086745 - listed here for completeness. You can easily adjust the gap that the cart_hook fingers span by typing a different number at the top of its CartHook.scad file.