Mechanical parts
n=4 Railway Ratchet Compensation Wheel
- Bounding box
- 565.9 × 565.9 × 50.1 mm
- Engine
- Precision B-rep
- Parameters
- 20
- Published
- September 25, 2026
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The prompt
Create a parametric 3D CAD model of the railway ratchet compensation wheel from Qi et al. (2024), n=4 reconstructed model. Match the supplied reference image: one large toothed ratchet wheel, four symmetric curved structural members at 90°, central hub/shaft region, and small compensation wheels with rope grooves. Critical dimensions: • Large wheel OD = Ø566 mm • Large wheel reconstructed thickness = 15 mm • Small wheel OD = Ø180 mm • Small wheel thickness = 13 mm • n = 4, four-fold symmetry • Rope groove radius = R5.5 mm • Groove angle = 120° • Rope diameter ≈ Ø9.5 mm • Minimum fillet = R2 mm • Transmission ratio = 1:3 • Material = ZL114A aluminium alloy Preserve the central hole and rope grooves as functional/non-design surfaces. Use smooth, curved force-transmission members rather than simple rectangular spokes. Reproduce the toothed outer ratchet profile and overall architecture shown in the supplied paper/reference image. Keep any dimension not specified above as an editable parameter; do not invent source dimensions.
Parameters
| Name | Value | Range |
|---|---|---|
| Large Wheel OD | 566 mm | 300 – 900 |
| Large Wheel Thickness | 15 mm | 5 – 40 |
| Rim Inner Dia | 470 mm | 200 – 520 |
| Ratchet Teeth | 40 teeth | 12 – 120 |
| Ratchet Tooth Height | 18 mm | 5 – 35 |
| Hub OD | 120 mm | 40 – 200 |
| Hub Length | 50 mm | 20 – 150 |
| Central Bore Dia (functional) | 50 mm | 5 – 80 |
| Member Width | 40 mm | 15 – 80 |
| Member Thickness | 15 mm | 5 – 40 |
| Member Curvature Sweep | 50 deg | 10 – 85 |
| Member Inner End Radius | 55 mm | 20 – 120 |
| Fillet Radius (min R2) | 2 mm | 0.5 – 4 |
| Compensation Wheel OD | 180 mm | 60 – 350 |
| Compensation Wheel Thickness | 13 mm | 5 – 40 |
| Rope Groove Radius | 5.5 mm | 2 – 8 |
| Groove Included Angle | 120 deg | 60 – 150 |
| Groove Depth | 8.5 mm | 4 – 20 |
| Compensation Wheel Bore | 20 mm | 5 – 60 |
| Compensation Wheel Mount Radius | 146 mm | 40 – 250 |
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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