I need help, im a paraplegic boy with the dream of come back to the streets, and i don't know how can i do the system of this video, if you see this video you can see how the old man takes the handlebars and the little wheels go up
Need help for a handbike - wheelchair
- Thread starter Lalos
- Start date
offGridDownUnder
10 kW
The company has distributors in Europe and the United States. You would buy one and import it.
I'm not certain what you are asking.
Are you thinking of building your own design?
Exatly. It's a homemade desing
offGridDownUnder
10 kW
Engineering is the process of refining a solution to a desired outcomes in light of overlapping constraints. There may be several ways to successfully realise ("make real") a functioning solution to a desired outcome, while avoiding the limits of possible constraints.
One approach may introduce different constraints than another approach, so different approaches may be able to ignore constraints that another approach must provide an answer for.
Your constraints are limits set by aspects outside of your control - the laws of physics, the weight and strength of materials, and also more specific constraints such as your budget, your ability to fabricate or access to someone who can do fabrication for you.
Start by listing the constraints that are obvious to your now. Can you do fabrication? With what materials? Are you in a position to learn some methods you don't know now? It would be a long time from now for me to learn how to weld aluminium in all it's alloys, but I have access to someone that has comprehensive experience, but who also has serious limits on available time.
Will your current wheelchair support this addition? Is it strong enough, stiff enough, does it have frame members that will support the attachment - survey what you have and note your thoughts and concerns to investigate.
Do you know of any other similar system - perhaps one that does not currently have a motor but provides the remaining needs? What is it fabricated from? The material may lend itself to modifications or be difficult to modify - 6061-T6 is strong, but after welding, you must put the entire item into a controlled oven to restore the strength, so you'll need a large, controllable oven.
7005 aluminium can just be left in the corner for a few months and will develop it's own strength, although there are details.
Real things are made of real materials with real dimensions. Can you do it? Sure - many people can, and so probably can you. How long and how much difficulty? You can find out.
Paint us a picture of your situation and the constraints you must accommodate.
stancecoke
1 MW
I‘ve built an own wheelchair puller branch for the EBiCS Firmware some time ago. It uses a bidirectional throttle for accelerating and braking in forward and in backward direction.
See this thread:
Can you run this BLDC motor backwards?
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The wheels don't pull up or move separately. The entire assembly is tilted forward along the main wheel pivot as he tightens it down and that lifts the little wheels off the ground.
Yours would do the same thing if it's mounting process is similar, where you attach it to the wheelchair first at an upper mount and then leverage it's lower mount towards the wheelchair as it's tightened.
If yours cannot be done that way for whatever reason, then you'd need to make a mechanism that is part of the mount for the little wheels that either lifts them straight up off the ground (the simplest for your design with the tube going straight up into the main "keel" of your system), or pivots them forwards or backwards to get them off the ground and out of the way.
If the pictures in your post are of the system you've built, then you'd need to make the mounting section stay fixed to the rest of the system, and not pivot at the top like it does now. Instead the entire system would pivot with the mounting section as the mount is tightened to the wheelchair, pulling the main wheel backwards and tilting the whole system like in the video.
Or add something separate to leverage from teh bottom of the mounting section's hinge panel to then close the gap between that and the rest of the system, pulling the main wheel backwards and tilting the whole system like in the video.
BTW, if the pics you posted are of the system you've built, we'd love to see more of it, if you'd post the details of it and it's construction, mechanics, electronics, etc. (this would also allow others who need one to make their own).
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Hoverboards are available online for $100 with 24v or 36v lithium packs. The master boards inside are programmed to go slow, both wheels are mini 3 phase motors with powerful magnets and good torque. Thrift stores may have a walker that could be fabricated. Another idea is kids cars that run on 6v or 12v, those motors, wheels, and axle can be harvested and reassembled as 2 wheel drive axles for a walker.
