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Oct 09

All-terrain Mobility Scooter, Part 4

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Shortly after this photo was taken, Pete said “Here, hold my beer and watch this!”

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The first test run of the drivetrain, with the wheels up on blocks and running at half power (12V). I needed the sprocket drives for two reasons:
(a) The axles coming out of the motors weren’t nearly strong enough to carry those big wheels, and
(b) I needed to reduce the gearing by a 2:3 ratio. The motor sprockets have 12 teeth and the wheel sprockets have 18.

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The steering had a lot of play in it, so I’ve decided to fit 2 bearing blocks to the steering column instead of 1. Here I’m using a 20mm end mill to square up a slab of plastic to make the pillow block.

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The old (very worn) pillow block bearing on the left, the raw blanks for new ones on the right.

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The two blanks with their bearing and mounting holes drilled.

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Roughly cut out on the bandsaw. My bandsaw cuts tend to “wander” quite a bit, so I tidied them up on the mill before splitting each bearing into its 2 halves.

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That extension loop holding up the top bearing was formerly the rear subframe of the donor quad bike. The pink painted pieces of steel came from a scrapped 2-wheeled hand trolley.

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Steering sorted, and temporary floor in place. I’ll be moving on to battery boxes and motor controllers tomorrow.

1 comment

  1. Eldora

    Whoa, things just got a whole lot eaeisr.

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