I believe the one you have is called a Mini Brute. They also had a 2 wheel version (like a bike) with big stubby tires called the Super Brute, some golf carts with cool options, and even made 2 Brute Cars (which were tiny) that had 4 wheels.
I got to meet the owner of the company that produced the Brutes in Fairmont, MN a couple years ago. His name is Milton Zenk, he was over 90 and still sharp as a tack when we spoke. He even gave me an original Bulldog decal and Brochure that had all the different vehicles they sold.