I did not make a wooden one,
but I did make one for one of my riding lawn mowers,
I ran two supports under the tractor to the rear to the hitch, and fixed it so that it would pin into the hitch plate,
on the front I made it so it was spring loaded and hinged about 3" up from the bottom of the blade, if some was hit hard the blade would give, and use the mower deck lift to raise it and lower,
on the supports there were two plate that would rub on the front of the tractor frame to keep it in alignment to the tractor, very simple and easy,
I used a section of a old hot water heater for the blade,
It worked amazing well, I do not think I have a picture of it, I do still have the blade unit, (the tractor is basically in retirement).