Toy Truck

Last crawled date: 1 year, 11 months ago

A simple toy truck that can be printed using an Ultimaker 3D printer. Designed to survive abuse by a common child (can withstand being thrown or stepped on by children).

Axles are printed in half and then two halves are glued together, to ensure the axle could be printed.

The axles are locked in their location by the groves on it. In the chassis and frame are matching extrusions that fit into the grooves to allow the axles to turn.
The wheels are connected to the axles with self tapping screws. The screws pass through the holes in the centers of the wheels, then are tapped into the hole in the center of the axles' faces. The wheels are designed for the screws to be countersunk, to prevent their heads from sticking out and potentially harming someone unprepared.
In addition, on each wheel (on the back side) and on each axle face, is a "connection pattern": a bulge on one side of the screw's hole and a fitting hole on the other. This pattern fits into itself, so that the pattern on each wheel fits into the pattern on the axle. That way even if the screw is a bit loose the wheel and axle will spin together.
The frame is connected to the chassis via the same kind of self tapping screws, from the bottom.

All screws are M2.5x12 self tapping screws.

Specifications:
Size: 106 mm X 81 mm X 65mm
Weight: 0.718lbs (326gr)

Construction:
1. print all parts: 4 wheels, 4 axle halfs, 1 chassis (black), 1 frame (red).
2. glue two axle halves together along the flat edge. The alignment of the "connection patterns" on the sides is not important. Make sure the axle halves are concentric. Do the same with the other pair of axle halves.
3. take a wheel and an axle, fit the "connection pattern" on the wheel into the one on the axle. Pass a screw through the middle of the wheel then tap it into the axle. do the same with the other wheels until you have two axles with two wheels on each.
4. put the red frame on a table upside down and place the axles on the fitting grooves in the frame, make sure the grooves on the axles fit the extrusions inside the frame's axle grooves.
5. place the black chassis on top of the frame, so that it's axle grooves cover the axles and the holes on the corners fit the holes on the frame. Place screws through the holes in the chassis and tap them into the frame.

The truck is ready! Should not take longer than 10 minutes to assemble.