I have a jazzy 1100 power chair that I restored for a family member who no longer needs it. I've tried to sell it, but cannot get an offer that would even cover the new batteries, so I picked up a go-kart frame, and am looking to power it with the chair. So far, I've figured out that the motors top out at 116 rpm. The kart has a 1" diameter rear axle with a worn 72 tooth sprocket and band brake on it. The chair spindles are 7/8" diameter on the round sides, and 9/16" on the flat sides, where the 13" wheels bolt on. My intentions are to weld the motor mount parts of the powerchair chassis to the go-kart chassis. I am trying to figure out
1.) Should I leave the motors mounted as is, with the drive spindles facing outwards, which would require a drive sprocket for each spindle, or should I switch the motors in the chassis, so that the drive spindles face each other, then connect them together with an axle and single drive sprocket?
2.) All the examples I've researched are using high RPM motors, and thus have small drive sprockets with large driven sprockets. With the low RPM/high torque setup I'm using, I'd have to go opposite on the sprocket ratios. Just throwing numbers around, if I did my math right...a 72 tooth drive sprocket connected to a 13 tooth driven sprocket (1:5.54), and a 13" tire would get the kart to 23.73 MPH (plenty fast for my 9 & 11 year old). Would I be asking for a bit much in the torque dept, or would it work?
I just have not seen any examples of a build using a powerchair mobility scooter...using sprocket size to achieve speed, versus quadrupling the batteries or designing new controllers. If it would work, I'd just use the motor controller on the chair, and limit its movement to forward and reverse. Any input?
1.) Should I leave the motors mounted as is, with the drive spindles facing outwards, which would require a drive sprocket for each spindle, or should I switch the motors in the chassis, so that the drive spindles face each other, then connect them together with an axle and single drive sprocket?
2.) All the examples I've researched are using high RPM motors, and thus have small drive sprockets with large driven sprockets. With the low RPM/high torque setup I'm using, I'd have to go opposite on the sprocket ratios. Just throwing numbers around, if I did my math right...a 72 tooth drive sprocket connected to a 13 tooth driven sprocket (1:5.54), and a 13" tire would get the kart to 23.73 MPH (plenty fast for my 9 & 11 year old). Would I be asking for a bit much in the torque dept, or would it work?
I just have not seen any examples of a build using a powerchair mobility scooter...using sprocket size to achieve speed, versus quadrupling the batteries or designing new controllers. If it would work, I'd just use the motor controller on the chair, and limit its movement to forward and reverse. Any input?