LEGO Crazy Swing Arm Action Mechanism

This is what we're going to build today.

Pieces we're going to use today:

Let's build!

LEGO Vehicles - Differential Gears 1 (Contraptions)

This is what we're building today.

Bottom view.

List of Parts we're using today:

Building steps:

I used this piece to make modifications - adding wheels to the back of the vehicle.

Bottom view.

This one was really fun to build, and I think I'll combine this one with one of the mechanism build to create a new contraption. I have to make modifications for the power function placement and add support structures to connect the two. Hopefully, I'll do that soon.

Have a great day!

Alternating Swinging Arms (Mechanisms) - Page 129, Build #170

Did I mention I like moving things? I especially like watching the gears move. So, this one was just perfect for today.

Parts we're going to use today:

Video for Swinging Arms:

LEGO Swing Arm Video

Simple Rack-and-Pinion gears (Mechanisms) - Page 115, Build #155

This is what we're building today - Rack-and-pinion gears.

Rack-and-pinion gears are used to change rotational movement (the yellow and gray gears with the rubber band going around it) to linear movement (the side-to-side movement going across the white pieces or racks). The steering system in cars is a good example of rack-and-pinion gears at work.

Parts I'm using today:

I'm making do with what I have. I'm pretty sure they'll work fine. If not, we'll just have to figure things out as we go.

Let's build:

1st design for the motor support.

In this state, it wasn't the white rack that moved from side-to-side, but the gears moving awkwardly.

So, I removed some support pieces, and stuck the motor on a bigger, anchoring piece. But this still moved things enough that the video didn't turn out very well. So, when I was recording the video, the gray platform had to be held down.

It was still neat to watch.

Here's a video. Enjoy!

Simple LEGO Rack-and-Pinion gears video

Have a great day!