Ok, the dog weighs about 7.5kg and the space required is about 30cm x 60cm, 20cm tall. With several materials available, I design a concept based on that data, building the design without being able to find the material would be really difficult. Avoiding sharp corners, I quickly changed the design a bit.
2
Mechanical
This step requires welding, grinding, drilling and cutting skills. I used a V3 iron with a thickness of 2mm for this design. Remember to use full protection when working.
The wooden board helps to bear the dog's load better, I designed 2 horizontal and slope modes but the latter completed the working horizontal mode is good enough.
The protective metal mesh helps the dog focus on running without falling out..
3
Final asembly
Assemble the rubber mat, 12VDC electric motor and spay paint to complete. Test operation by running the machine continuously for 2 hours. And finally here is the result after running the test.