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Old 01-06-2018, 01:22 PM
Barn Owl's Avatar
Barn Owl Barn Owl is offline
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Default Lift-Rite a Go Go

Several Months ago I bought a small Lift Rite hand push/hydraulic lift small fork lift. It is a really cool and very functional in tight spaces but it is very hard to push under load.
Someone also donated a heavy duty electric wheelchair to the church where I work but it is difficult for us to keep them working because the number of times someone needs an electric wheel chair from the church is very limited and the batteries generally die to the point of not recharging being forgotten in a closet somewhere.
I have decided to combine the two and make a handy drivable mini fork.

The dual gear drive motors are the same type that the nerdy kids use on their battle bots and are very stout. But the axles are designed fora wheel chair not a fork lift. I turned new axles out of an old 1.125" hydraulic ram and they are now up to the task. I tried to use many of the suspension arms off of the chair and repurposed them to work on the lift. keeping in mind that the drive system is just for pushing not supporting any load.
Figuring that the chair weighed 200 pounds and had a had a weight limit of a 400 pound person. Generally there is a safety factor of at least 2 for things that move or lift humans so I am confident that these motors can move most of what I will need to lift with this fork.
The frame that I will be attaching the rolling gear to is mostly designed to surround the hydraulic pumps, so I need to re enforce the wheel attachment points.
It will make more sense from the photos.
Photo #1 the lift
Photo #2 the welded re enforcement on the frame
Photo #3 & 4 the old suspension off of the chair but with larger axle capacity
Photo #5 the Axel shafts being threaded
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  #2  
Old 01-06-2018, 01:41 PM
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The wheel chair works like a skid steer where to turn left the wheels spin in opposite directions, and the same for turning right. Since this new arrangement will be designed like a real fork lift where the turning will be accomplished by actually turning the wheel right and left rather than just reversing direction.

I have saved a 2:1 ratio small tractor lawnmower transmission that will now be repurposed as a steering box for the wheel motors. The spindles are being designed to sit directly over the pivot point of the wheels so that the wheels will turn 180*. The joystick for the wheel chair will be locked out to move only forward and backward with no left or right.

The wheels are going to be positioned behind the lift in a pushing type geometry. pictures to follow soon.
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"Yes, we did produce a near perfect Republic. But will they keep it? Or will they in their enjoyment of plenty, lose the memory of freedom? Material abundance without character is the surest way to destruction. Indeed, I tremble for my country when I reflect that God is just."

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If you spent 1 million dollars every day from the time Christ walked the earth until now, you still would not have spent 1 trillion dollars!
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  #3  
Old 01-06-2018, 02:23 PM
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I am liking this.
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Old 01-06-2018, 04:47 PM
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Would seem this drive system would be of use on other applications around a shop/farm arena.

Outside the box thinking and all.
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Old 01-07-2018, 11:39 AM
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gimpyrobb gimpyrobb is offline
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Post as many details as you can, I have the "big Joe" version. I may have to copy your ideas.
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  #6  
Old 01-16-2018, 11:37 PM
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Barn Owl Barn Owl is offline
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I have had my annual parade float distract me from this project so now I will be back at it soon.
I have more pics but just need to load them up.
Hiway I was thinking that same thing, I wish I had more motors to put on other things)
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Mike

"Yes, we did produce a near perfect Republic. But will they keep it? Or will they in their enjoyment of plenty, lose the memory of freedom? Material abundance without character is the surest way to destruction. Indeed, I tremble for my country when I reflect that God is just."

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If you spent 1 million dollars every day from the time Christ walked the earth until now, you still would not have spent 1 trillion dollars!
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  #7  
Old 01-24-2018, 02:29 AM
Rob65 Rob65 is offline
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I have a similar Lift-Rite, my solution to the manoeuvrability problem was to take the forks of and put them onto my baby Bobcat. They work a treat.

Rob


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  #8  
Old 01-24-2018, 01:38 PM
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Barn Owl Barn Owl is offline
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Well that is one way to fix the problem. I guess I will add "build a baby Bobcat" to my list.

Cutter, yeah a figured when you are pushing it with brute force your feet tend to be way back behind the lift and away from danger, but if the motors are doing all of the work there is a big possibility of gettin yerself rund over!
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"Yes, we did produce a near perfect Republic. But will they keep it? Or will they in their enjoyment of plenty, lose the memory of freedom? Material abundance without character is the surest way to destruction. Indeed, I tremble for my country when I reflect that God is just."

Thomas Jefferson



If you spent 1 million dollars every day from the time Christ walked the earth until now, you still would not have spent 1 trillion dollars!
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