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The electric powered gocart project

Konusu 'Karışık Bilgiler - Sohpet - Muhabbet' forumundadır ve uydudoktoru tarafından 26 Mayıs 2015 başlatılmıştır.

  1. uydudoktoru
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    uydudoktoru Tanınmış Üye Yönetici Yönetici

    Katılım:
    13 Haziran 2009
    Mesajlar:
    2.135
    Ödül Puanları:
    38
    Data:
    Made By Thomas Scherrer, June 2004.
    Speed = 15-17km/h
    Weight = 77.8kg Total
    Weight break down: Chassis with motor unit = 32.7kg, Front wheels = 3.4kg, Rear wheels = 7.8kg, Battery = 14.5kg x 2
    Seat = 2.8kg, Foot plate = 0.9kg, Steering wheel = 0.4kg, Electronics and cables = 1kg
    Length = 120cm (including wheels)
    Width Rear = 66cm
    Width Front = 60cm
    Power = 2 x 13.8V 55Ah Lead Acid L2 Car batterys
    Motor unit with differantial 24V 20-100A depending on load (taken from old wheel-chair)
    Brake system, electrical magnet system, and electric motor brake
    Speed control = Pulse width controled computer system (To be defined)

    [​IMG]
    The Iron frame is made of 5x1 cm, and bended using brutal force.

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    My drawing made so I could figure out how to make it.. all measurements are in cm.

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    Batteries are lowered to fit under the iron stick.

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    The front wheels mounting will be strong enough for my kids.

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    Lucky me !! the length of the two batteries are exactly the same length inside the two iron sticks.

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    three 10mm bolts are used to mount the rear stuff.. motor and gearbox with differantial is one complete unit.

    [​IMG] [​IMG]
    All is homemade using turning lath and welding, the steering stuff are full of ballbarings.

    [​IMG] [​IMG]
    One 8mm bolt is fine to secure the front wheels.

    [​IMG]
     
  2. uydudoktoru
    Offline

    uydudoktoru Tanınmış Üye Yönetici Yönetici

    Katılım:
    13 Haziran 2009
    Mesajlar:
    2.135
    Ödül Puanları:
    38
    The footrest plate is 8mm plywood.

    [​IMG] [​IMG]
    it was easy to use the ballbaring system from an old bicycle.

    [​IMG] [​IMG]
    The seat is made using 10mm plywood, , Steering stuff welded in place.

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    The seat can be opened using hinges, then access to chargeplug, batteries and speedregulator will be easy.

    [​IMG] [​IMG]

    How to make the wooden steering wheel.
    [​IMG] [​IMG]
    First I made an aluminium hub with six M5 threads, the 3 plywood plates was cut out,
    then attached to the hub one by one and then in the turning lathe to make them perfect round.

    [​IMG] [​IMG]
    I had to make a special tool for the milling machine, so I could mill out the edge I needed

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    Last gluing all 3 parts, next day more work in the turning lathe..

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    After 20 mins in the turning lathe, and first layer varnish

    [​IMG]
    More progress, foot plate mounted and painted, steering wheel mounted.

    [​IMG]
     
  3. uydudoktoru
    Offline

    uydudoktoru Tanınmış Üye Yönetici Yönetici

    Katılım:
    13 Haziran 2009
    Mesajlar:
    2.135
    Ödül Puanları:
    38
    I fould some trailer-lights cheap at a local haral-nyborg shop

    [​IMG]
    I mounted a plate for the feet and speeder and brake pedals.

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    This is the most stupid way to test the max speed of this gocart, using a foot pressed activated switch
    and then just push the gocart up to a fair speed and then shout "PRESS THE SPEEDER" and then shout "RELEASE SPEEDER"
    oliver-test-drive.avi 800kb here is a 7 sec DIVX4 video clip, note his foot most of the time is used to slow it down again !

    [​IMG]
    We made the test a few times indoor becoarse it was rainning and windy as usual outside,
    WOW I was happy and my kid was more than thrilled, the motor force and speed is more than we could dream of !

    [​IMG]
    Then it is time for homemade speeder and brake pedals

    [​IMG]
    First I made some testing using cardboard, and then just cut it out in 2mm alu.

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    Next steep will be to add analog potmeters, microcontroller and power fets..

    Project dropped, kids too small to handle the power
     

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