Hand-Crank Wheelchair with Differential

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Bounding box: 1400.1 × 1415.0 × 1080.0 mm
Engine: Precision B-rep
Parameters: 41
Published: November 5, 2026

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The prompt

We have to make a CAD model such that a wheelchair should have to cranks, and when this two cranks are moved, the wheelchair should move forward due to the chains connected and they connect connecting Road and add differential mechanism possible

Parameters

Name	Value	Range
Frame Length	1000 mm	600 – 1500
Frame Width	650 mm	400 – 900
Frame Height	900 mm	600 – 1200
Frame Tube Size	40 mm	20 – 60
Seat Width	450 mm	300 – 600
Seat Depth	450 mm	300 – 600
Seat Thickness	80 mm	40 – 120
Backrest Width	450 mm	300 – 600
Backrest Height	500 mm	300 – 700
Backrest Thickness	80 mm	40 – 120
Crank Arm Length	170 mm	100 – 250
Crank Arm Width	30 mm	15 – 50
Crank Arm Thickness	30 mm	15 – 50
Crank Sprocket Diameter	150 mm	80 – 250
Crank Sprocket Thickness	15 mm	5 – 30
Crank Grip Length	120 mm	60 – 150
Crank Grip Diameter	30 mm	15 – 50
Crank Shaft Length	700 mm	500 – 900
Crank Shaft Diameter	20 mm	10 – 40
Bearing Block Length	60 mm	40 – 100
Bearing Block Width	40 mm	20 – 80
Bearing Block Height	40 mm	20 – 80
Chain Width	10 mm	5 – 20
Chain Thickness	20 mm	5 – 30
Chain Run Length	500 mm	200 – 800
Connecting Rod Length	300 mm	200 – 500
Connecting Rod Diameter	10 mm	5 – 25
Rod End Ball Diameter	20 mm	10 – 30
Differential Diameter	150 mm	80 – 250
Differential Width	100 mm	60 – 160
Differential Side Sprocket Diameter	100 mm	60 – 200
Differential Side Sprocket Thickness	20 mm	5 – 40
Rear Axle Length	700 mm	500 – 900
Rear Axle Diameter	25 mm	15 – 50
Rear Wheel Diameter	600 mm	400 – 800
Rear Wheel Width	50 mm	30 – 80
Caster Wheel Diameter	200 mm	100 – 300
Caster Wheel Width	40 mm	20 – 60
Caster Stem Diameter	20 mm	10 – 40
Caster Stem Length	120 mm	60 – 200
Caster Fork Thickness	10 mm	5 – 20

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.

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