[HN Gopher] Show HN: I Designed and Built an eBike ___________________________________________________________________ Show HN: I Designed and Built an eBike This post shows and explains the design of the eBike I built myself. I decided to post it on this specific forum because this is where it all started, by stumbling on another post, as mentioned in my entry. Author : gkasev Score : 35 points Date : 2022-02-23 21:46 UTC (1 hours ago) (HTM) web link (endless-sphere.com) (TXT) w3m dump (endless-sphere.com) | ghostly_s wrote: | So it drives the pedal shaft? Isn't that a safety hazard? | KennyBlanken wrote: | It looks like it has a chainring clutch, though without a | chainguard cover, you have the risk of clothing, body parts, | shoelaces, etc getting sucked into the chain, yeah. | | The motor sticks out uncomfortably close to the pedals and | particularly on a MTB I could see a rider accidentally stepping | on it...and it looks like an outrunner, so that would also be | quite bad, as the foot would get launched backwards pretty | violently. | | This is a lot of effort compared to just bolting on a Baofang | mid-drive motor. The components are also placed such that | unless you have a pretty good front fender, they'll be covered | in crap in no time. | slingnow wrote: | Cool build, but it doesn't look like it would actually stand up | to the typical stresses of mountain biking (rock strikes, water, | mud, debris, etc). On super smooth singletrack I could see it | being fun though. | bri3d wrote: | A few ideas: | | * A VESC based ESC instead of the HobbyWing one will give a lot | more control and telemetry, including a phone app and detailed | current use logging. I know from RC planes that HobbyWing ESCs | are very high quality, but VESC is specifically written for drive | systems and has a lot of features. | | * LiIon or LiFePO4 round cells are safer and more energy dense | than LiPo pouch cells, at the expense of current sink capacity | you don't need. They're also cheaper. | vosper wrote: | It's a conversion of an existing bike to be electric, right? Or | did you design and build the frame, too? Either way, nice work! | | I think we're about to see a lot of innovation in scooter- and | bike-adjacent mobility things - I don't mean the motors, but the | frames etc... eg we might see more cargo e-tricycles? | mdoms wrote: | Why the no welding requirement? | Hextinium wrote: | They probably don't have access to a welder and so they can't | weld. It looks like they have a router table and a sheet metal | bender so that's what they used to make it. | mft_ wrote: | How are the mounting brackets made (or obtained)? You said you | didn't want to CNC anything, but they look CNC or laser cut? | | Any estimates of your expected range? | 2muchcoffeeman wrote: | Is it weather proof? I guess not since the motor windings are | exposed? Where did you get the sheet metal fabricated? | | Otherwise looks good! | | When I got a 3D printer it was amazing to be able to make my own | designs, but I wish I had the capability to work with more | durable materials. | jstanley wrote: | You mention a throttle - I had a skim but couldn't find anything, | I wonder if you considered adding a pedal-assist system of some | sort? | | I suppose a throttle is a much more direct connection between | your mind and the motor control, unfortunately they are illegal | in my country. ___________________________________________________________________ (page generated 2022-02-23 23:00 UTC)