I am trying to customize a standard hand truck with an electric motor to assist with move 600-800lbs on and off trailer ramp - from curbside thru the customers yard, (grass, dirt, mud, slope). We have tried using winch motors but they are too slow and too loud. Any suggestions on the right combination of gear ratio, speed, torque capability, battery capacity/length of use, would be greatly appreciated. I am currently using a 48 tooth sprocket on 1" axle with a #40 chain 1/2" pitch x 5/16" with.
We are using standard Golf Cart Tires so I believe they are 17in. Thanks for your help!
Correction the tire size are 11inch
This size of motor is capable of powering and electric scooter or bike up to 25 MPH so when geared down to 3.28 MPH it will have a tremendous amount of torque.
The sprocket on this motor is for #40 chain like you are already using. We can make a kit with a motor, controller, throttle, batteries, charger, etc. if you would like. Do you want for the hand truck to have forward and reverse or only forward?
Hello and thanks for getting back to me on this.
To answer your question, YES, I'd like for it to go forward and reverse. We have also decided since posting to use golf cart size tires (18in tire hight). If you can put a kit together for me, that would be awesome.
Just wanted to make sure that this setup will be strong enough to move 1000lbs max....???
Ok... wow you guys think of everything. I'd say nothing more than 30 degrees just to be on the safe side. So lets go ahead with the 1000 watt setup. Thanks for all your help.
Let me know what package to get?
For a 1 MPH top speed a 275 tooth axle sprocket would be needed, however, a 275 tooth axle sprocket would have a diameter of 44 inches so it would not work with an 18" wheel.
So a jackshaft would need to be used in order to get a gear ratio for a 1 MPH top speed. Here is a gear ratio calculation with a jackshaft that produces a 1 MPH top speed.
We can make a kit with everything up to the motor and from there on you would need to source the jackshaft and jackshaft sprockets from a go-kart parts store.
I don't think that we have discussed battery size yet. A 48 Volt 1000 Watt controller can demand 30 Amps during peak loads. A minimum battery pack size of 48 Volts 15Ah is recommended for this amount of demand. This size of a battery pack is estimated to provide 45 minutes of run-time.
Are 45 minutes of run-time enough?
What type of throttle would you like the kit to have? (twist throttle or thumb throttle)
Will toggle switches be okay for the power and reverse switches?
Is there a setup that will still provide a walking speed of 3-4 mph while being able to do 30% trailer ramp gates? The 1000lbs would be the absolute max and not necessarily the norm in terms of the standard weight of items being moved. Id say the average weight would be more along the lines of 300-600lbs but I still would like it to be able to function in those extreme situations when we do go over the 800lbs mark which isn't often. As for the battery the bigger the better. I would like some sort of thumb throttle and toggle switches will work for power and revers switches.
Battery size is not an issue, so which ever one works the best to get the most use from battery life is the one I'll take. As for motors, lets go with the one 1000 watt motor setup for now and later if we need to go with the dual motor situation we can add that to our design.
Thanks again for all your input.
Please let me know if you have any questions.