No Screw Threads This Time
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This is a design for a modification to a wheelchair lift in a van.
The lift was designed to pick the chair up by the small diameter aluminum tube across the backrest, red arrow in the next image. That puts the entire weight of the chair on the welds at the ends of that tube along with the hinge hardware at the bottom of the backrest. These hooks transfer nearly all of the load to the axle tube (green arrow) which is much more robust.
Hooks installed. The white is some foam tape I had on hand. It'll get replaced when I find some suitable black or gray medium density foam tape.
(Screws are now all button head to match the hardware on the lift.
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Are the chairs known to fail over time when lifted by its intended bar?
If you patent it I've the perfect name for it... Axle RoseUp
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@rich o brien said:
Are the chairs known to fail over time when lifted by its intended bar?
I've seen broken backrest frames before although not specifically related to this model of lift. The welds and the hinge mechanisms are clearly not designed to support the about 13 Kg weight of the chair all the time, not to mention the added g-load when traveling over bumps on the roads.
@rich o brien said:
If you patent it I've the perfect name for it... Axle RoseUp
Very good. If I go that route I'll give you a cut of the profits.
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