Biting Obstacles Autonomous Robot « Sanglier » (boar)

Picture of Biting Obstacles Autonomous Robot « Sanglier » (boar)
General concept

Our first idea was to create a tracked robot able to climb stairs and plenty of others obstacles, to reach a good speed (around 10 or 15 km/h) while filming and transmitting data. It will decide itself if it can go through an obstacle like a slope, stairs or a hole.  Recognizing people and following them, take panorama pictures, follow a GPS designate way are its objectives.
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Step 1: Chassis

Picture of Chassis
We made a wooden chassis because wood is cheap and easy to transform. We used 5 mm plywood. This chassis need to be quite big if you want to set batteries, engine and electronics in it and suspensions, wheels and turret at the exterior; there is no maximum size but making it too big can be a problem  for the gravity center of the robot when it climbs stairs.

Step 2: Tracks

Picture of Tracks
This is one of the hardest parts of the construction so be prepared.
We used :
- 4 bicycles chains that a bike store gave to us (they are about 140/150 cm)
- 4 identical gearwheels that we bought near 5 € each
- wire
- aluminum rod (about 2.5 m)
- rubber (quite the same length than aluminum rod).

We attached the chains by pairs with the aluminum rod and wire and then we attached the rubber to them.
Power wheel are made of 2 gearwheels with one wooden disc between them. Be sure to have the same space between the chains at every new component you add, then you can circle your chains.

Here is our first test od the tracks !

Step 3: Turret

Picture of Turret
We used the same plywood for the chassis and the turret, you can do every design you want. The turret rotate with a Servo controlled by an Arduino, we replace the gun by a camera that can go up and down with another Servo. The roof plate is fixed by three screws so we can access easily to the inside, the other plates are pasted.
gcanders2 years ago
Very cool looking vehicle. I am glad you posted this. I have been collecting parts for a robot project for a few weeks and was about to make a small rc car sized vehicle. After seeing your larger project, this seems like a better idea for future upgrades and experiments. Could you post the size of the engines (I could not find it in the pictures) and is power supply you are using a 12v lantern battery? It looks like it has individual cells. Also, how heavy is the wooden frame you created? For less jostling, I was going to use a rubber disk suspension, but that might not be enough if the vehicle is weighty.

Thanks again for posting this. Great job!

C Anderson
SnowViet (author)  gcanders2 years ago
We are currently using some parts of a RC tank (1/16). But we have some problems, two plastics gears just broke while we were trying to move the robot.
We are looking for some new gear (maybe int metal) and new motors.
Here is a link of similar stuff : http://www.absolu-modelisme.com/chenilles-metal-german-panther.html
I don't know "Lantern battery".
But we are using a 12V lead battery for the RaspBerry Pi and the arduino (after DC/DC conversion).
For motors, we are using a 11.1V Li-Po battery with 2200mAh, but we will probably use a bigger one after.

The wooden frame is very strong, we can load it with 5kg and more without any problem.

The approximate weight of the robot is 5kg with all the electronic/motors/batteries...

I hope it will help you, if you have other question, ask me!


PS : tell me about the evolution of your project.
Thanks u very much big help
SnowViet (author)  gbenn51020002 years ago
You're welcome!
What did you use for the creation of the blueprints?
SnowViet (author)  stormagedon982 years ago
For 3D modelisation, I used SolidWorks.
It's not the best but I used it in school.
What software did u use.
SnowViet (author)  gbenn51020002 years ago
For 3D modelisation, I used SolidWorks.
It's not the best but I used it in school.
Thanks for the upload.
J-Five2 years ago
This looks cool,

and "Tanks" for posting it
GREAT JOB! Can't wait for vids. Let me know when this project is complete, I would like to feature it.

Community Manger
SnowViet (author)  audreyobscura2 years ago
Thanks for your feedback !
I added some videos, hope you will enjoy.
We had a problem with the motor gear, so next update will not be soon.