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The Do-it-Ourselves 2x3-x2
The 2x3-x2 is my 4th prototype. Rather than having a trike wheel, this design uses (2) 4" front caster wheels. This design is more suitable for smooth terrain.
Same as the 2x3-X, the rear-axle is going through the Upper Chassis rather than a vertical brace. Note the use of hose clamps to reinforce the wood axle area of the frame. Foam blocks are used to raise the seat to the desired level creating the "floating seat".
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4" swivel casters (2).
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Instead of metal collars, I am using cheap hose clamps for the 1/2" through axle.
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The leg supports use 1x4s.
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The seat and sideguards are 1/4" plywood.
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Notice the "floating" seat design using a cut up foam block for "suspension". This method is used for lessening impact on martial arts floors for falls.
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The backrest cushion is foam padding covered with black gorilla tape as a cover.
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Seat cushion is made from a cut up exercise mat using a pillowcase as a cover.
The 2x3-x2 is very cheap and easy to build. Perfect for learning about wheelchairs in terms of design and functionality.
2x3-x2 Stock List
2x3s (Three 2x3x8' lengths)
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Front Bottom Cross-brace - 15" (1 piece) (W)
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Middle Cross-brace - 12" (1 piece) (W) (calf rest)
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Upper Rear Cross-brace - 12" (1 piece) (W)
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Footrest - 10.5" (1 piece) (W)
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Lower Rear Cross-brace - 15" (W) (1 piece) (bottom/rear of wheelchair)
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Lower Chassis - 23" (2 pieces) (L)
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Upper Chassis - 21.5"-22" (2 pieces) (L) (Holds axle)
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Backrest support - 20" (2 pieces) (H)
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Caster Support Block - 3" (2 pieces)
2x4
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Caster Base Block 5.5" (2 pieces)
1/4 Plywood (2' x 4')
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Seat panel 15"x15" (2 pieces) (L)x(W)
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Backrest 15"x16" (1 piece) (W)x(H)
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Sideguards 17" x 8" to 5" to 2.5" (2 pieces) (L)
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Lower triangle (scrap, cut to fit) (2 pieces) (L)
1x4
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Leg support - 16" (2 pieces) (L)
Rear Axle = 23" x 1/2" steel rod (1 piece) (W)
Swivel Caster - 4" (2 casters)
Screws
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(50) #10 x 2.5" long
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(65) #10 x 3/4" or larger
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(4) #10 x 2" machine bolts, washers, locking nuts.
Hose clamps - (6) 1/2" diameter, (4) 3" in diameter
Foam blocks for suspension
Foam padding for backrest and seat cushion (cut up exercise mat?)
Note - The prototype wheelchair is sized to fit my general size. I am 5' 8" and 140 lbs.
The width (W) of the wheelchair is 15".
In order to increase the width to 16", add 1" to all the dimensions labeled with a (W).
To increase the length, add to dimensions labeled with a (L).
To increase the backrest height, add to dimensions labeled with a (H).
