A ground platform on four 235/70 R15 wheels: a sheet-metal frame, two BLDC motors with planetary gearboxes, chain drive to the hubs, batteries and controllers in a ventilated body.
A compact ground platform on ordinary car wheels with electric drive, buildable from sheet metal and bought-in units.
My part: frame, drive and transmission layout, placement of batteries, controllers and cooling, and a full assembly with fixings for every unit.
Drive, batteries and cooling must fit in a body between four wheels almost 0.7 m in diameter.
Transmission. Each motor drives a shaft through a 15.875 chain and sprockets, and from there chains go to the wheel hubs. Tension, alignment and flange bearing mounts are set in the assembly.
Geared motors. Two 48 V 1000 W BLDC motors with planetary gearboxes sit so the chains run in one plane with the sprockets.
Power and heat. Two E78 3P8S batteries, two 70 A controllers, 80 × 80 fans and an air filter: heat has to leave the body without opening it to dust.
Standard units. 235/70 R15 wheels on hubs, UCFL flange bearings, a tow ball: everything is bought in, so the mounts follow the catalogues.
A sheet-metal frame for laser and press brake, and everything that turns or carries current from a catalogue.
Sheet-metal body-frame with ribs and brackets for shafts, motors and bearing units
Drive: 2 × 48 V 1000 W BLDC motors with planetary gearboxes, 15.875 and 12.7 chains, 42T and 48T sprockets
Shafts on UCFL 203, 205 and 207 flange bearings, DIN 6885 keyed joints
235/70 R15 wheels on hubs, standard DIN 933, 985 and 125 fasteners
Power: 2 × E78 3P8S batteries, 2 × PWM 12…60 V 70 A controllers, filtered ventilation, power inlet
Assembly envelope 1668 × 1291 × 711 mm. Sheet-metal frame and body, shafts on UCFL flange bearings, DIN 6885 keys, DIN 933/985/125 and DIN 929 fasteners.
Drive and power: two 48 V 1000 W 20 A BLDC motors with planetary gearboxes, chain transmission, two E78 3P8S batteries, two 70 A PWM controllers, 80 × 80 24 V fans with an air filter.
A complete SolidWorks assembly with frame, drive and power subassemblies, and a STEP of the whole platform.
The platform is one model from frame to fasteners: you can see where every motor, chain, bearing and battery sits and how it is fixed.
Sheet-metal flat patterns and a bought-in parts list for purchasing come from this assembly.
Send a sketch or a photo, and within 24 hours I'll tell you how long it takes and what I need from you.
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