Joint to make cart fold in half

thingiverse

Here's an updated version: https://www.thingiverse.com/thing:4015540 Wheels: https://www.thingiverse.com/thing:3996387 You'll need the following for this project: A cart of some kind, which I used this one: https://www.walmart.ca/en/ip/mainstays-deluxe-shopping-cart/6000195942919 2 x 5/16” x 2” bolts with matching nuts (0.432”) 6 x ¼” x 1-½” bolts with matching nuts (0.495”) Super glue Hacksaw Pencil Tape ¼” drill bit for steel, drill You may also want to have some sort of Velcro, sewing thread, or needle on hand if you plan to use the bottom belt on the bag. I bought a cart from Walmart but it was too big to sneak around with before using it, so I decided to cut it in half. I added an over-engineered 100% infill hinge so it wouldn't look weird when folded up. It now fits in a large fabric grocery bag. Why bright red if I'm trying to be stealthy? Well, that's all the paint I had left over... I'll probably paint them black eventually. This is more of a "you can do this kind of thing" type project, not a "buy this cart and use this STL to make it better" deal. If you can find a cart with a telescoping handle, that would be much better, but if you have a cart and want to make it better, you can try adapting these STLs or making your own to achieve a similar result. I use this cart to save my shoulders from the 25 kg of flour I buy from Bulk Barn every now and then for baking. It also comes in handy when bringing home packs of bottled water. I even used it once to bring home a utility shelf unit with some bungee cords attached. Tips for use: Use the "cart test slide on 1.stl" and "cart test slide on 2.stl" to make sure it will fit before printing the whole thing. There's a small gap between the part and the joint STLs, so you can use tape to create a friction fit. Measure out the height of the cart from top to bottom and divide by two. Mark the tube on both sides with a pencil and cut them at the mark with a hacksaw. Deburr the cut edges. After printing out the joints, apply some tape between the tube and the joint to ensure a snug fit. Place one of the joint halves on the tube, making sure the larger hole is facing forward, and drill out the bolt hole in the tube using the joint's hole as a guide. Secure the joint half with a bolt and then drill out the other side from the opposite side. Ensure both joints are oriented the same way, with the larger holes facing forward (as shown). Repeat for the other half and the other joint. Use super glue to attach the handle to the long bolt for the pin. Also use super glue to attach the nut to the receiving end of the long bolt/pin. You can use elastics on the pins to keep them from falling out and getting lost during transport.