3 Wheel Mobility Scooter Clone Version2
A couple of years ago I built a large mobility trike a lot like a Palmers Industries Independent version.
Since I knew it was going to have to be rebuilt anyway I took the chance to extend the rear so I could install a basket the roughly the same size as a large grocery shopping cart. The picture below shows the differences between the old and new trike on length.
I used the same twin 24v 500w motors and lawnmower tranmission I used in the first trike. The only difference was I mounted the motors vertical and the transmission horizontally this time like it is supposed to be mounted. I had it mounted sideways in the first trike. It's kind of funny. Even using two motors on this, I still don't have as much power as I do when using my little small mobilty scooter. The motor on that is rated 1.5 hp while both these two motors together only put out a maximum of 1.3 hp.
A big change I made in this model was I used two 12volt 100 amp hour marine deepcell batteries in the first trike and they were mounted beneath the seat. This trike is using two 12volt 32 amp hour sealed scooter batteries mounted at the back end. This time instead of worrying as to whether I have enough battery power to get somewhere I simply solved the problem.
Under the seat is mounted a 5.5 hp vertical shaft lawn mower engine I bought from Harbor Freight and it's running a 24 volt 100 amp alternator through a jackshaft in front of the transmission. If my batteries get low I can simply start up the engine and run the electric drive motors on the alternator. I doesn't get the best gas milage doing that but it doesn't leave me stranded with a dead battery either.
Another change was I made and installed some large rear disk brakes on this version. The front brake and transmission brake on the other trike did an OK job but I wanted a little more stopping power this time.
The trike has a maximum speed of 15 mph. I geared it down on purpose to comply with the mobility scooter laws. It could probably do about 20 mph with different sprockets on the transmission.
My original plans were to be able to run it on either the electrical motors or the gas engine through the transmission but it turned out that the freewheels I used couldn't handle being freewheeled about 2500 rpm. They died on me almost immediately. So I switched the engine over to driving the alternator and only the electric motors driving the transmission. It will at least regen to the batteries this way when going down long hills and I get the same end result as far as range goes so I'm more or less happy with it.
I started out using belts from the motors to the transmission this time because I wanted it to be quiet. It didn't make any difference as the noise I thought was coming from the chains turned out to be coming from the transmission itself. That thing is noisy! I took it apart to see if I could find out where it was coming from but nothing in the transmission was broken and after cleaning up the gears and inspecting them throroughly it was wasn't even worn in from what I could see. So far it hadn't even worn off the orginal machine marks on the gears. I just have to assume that lawn mower transmissions are noisy and you don't normally notice it due to engine noise when they are being used.
Picture of the transmission when I took it apart. It had plenty of lubrication and showed almost no wear on the parts.
Here's a picture of the frame before I started adding all the parts. It's not as heavy as it looks.
Top view looking down at internals. Those motor pulleys abd belts have been switched over to sprockets and #25 chains.
Running/turn signals, headlights and a mechanical speedometer.
I have another very bright led headlight mounted beside the speedometer now and have
The trike is straight. That pavement there is angled down.
The pin type trailer hitch is capable of use all my various bike trailers.
Brake lights and running/turn signals use seperate light pairs.
The gear shifter is on this side
It simply moved forward and backward 4-3-2-1-N-R
The small throttle knob under the seat is the engine throttle control. I simply set it to run at one speed for the alternator.
The trike has a full lighting system including head lights, tail lights, turn signals and emergency flashers.
I used a boat seat this time instead of a lawn tractor seat. This one should at least handle the weather better.
The engine brake release is on this side - lawn mower engines like this one don't use an electric kill switch.
The power switches are [aux power in/out] - [alternator] - [main battery] in that order.
You can just see the parking brake knob there on the front of the frame below the seat. It's more visible in the front view
The foot pedal operates the rear disk brakes.