Gears and transmission
Gear-Driven Variable-Dihedral Wing Mechanism (Exploded)
- Bounding box
- 832.0 × 74.0 × 50.5 mm
- Engine
- Precision B-rep
- Parameters
- 51
- Published
- September 17, 2026
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The prompt
Create a precise parametric 3D CAD model of a GEAR-DRIVEN VARIABLE-DIHEDRAL WING MECHANISM for the AeroMorph-GD UAV. Create ONLY the mechanical gear mechanism. Do NOT create the wing. UNITS: millimetres (mm) MAIN COMPONENTS: 1. Gearbox housing - Length: 60 mm - Width: 50 mm - Height: 30 mm - Include mounting holes: 4 × Ø4.5 mm 2. Motor - Cylindrical BLDC motor - Diameter: Ø28 mm - Length: 30 mm - Motor shaft: Ø4 mm 3. Pinion gear - Preliminary pitch diameter: Ø10 mm - Gear ratio target: 4:1 - Pressure angle: 20° - Mount on Ø4 mm motor shaft 4. Main spur gear - Preliminary pitch diameter: Ø40 mm - Gear ratio: 4:1 - Bore: Ø6 mm - Mount rigidly to the output/hinge shaft - Pressure angle: 20° 5. Output shaft - Diameter: Ø6 mm - Length: 50 mm - Coaxial with the wing rotation axis 6. Hinge bracket - 50 × 50 × 5 mm - Central Ø6 mm shaft hole - Provide bearing seats 7. Bearings - Outer diameter: Ø25 mm - Width: 7 mm - Concentric with the Ø6 mm output shaft 8. Locking index plate - Radius: 30 mm - Thickness: 5 mm - Include locking holes at: 0° 10° 20° - Locking hole diameter: Ø5 mm 9. Locking pin - Diameter: Ø5 mm - Engagement length: 10 mm - Travel: 12 mm - Add spring: Ø8 mm outer diameter 20 mm length 10. Spar adapter - 40 × 35 × 3 mm - Hinge hole: Ø6 mm - Spar connection hole: Ø12 mm ASSEMBLY: Motor → Ø4 mm shaft → Ø10 mm pinion → Ø40 mm main gear → Ø6 mm output shaft → hinge axis → spar adapter. The main gear and output shaft must rotate together. The locking system must independently lock the mechanism at 0°, 10°, and 20°. Do not use the motor or gears as the primary locking element. IMPORTANT: - Keep all components as separate editable parts. - Apply realistic mechanical clearances. - Use concentric and coincident constraints. - Create proper gear tooth geometry. - If the Ø10/Ø40 dimensions cannot produce a manufacturable standard gear, flag it as PARAMETER TO BE VERIFIED rather than inventing dimensions. - Generate an assembled 3D model, exploded view, front view, side view and top view. - Add dimensions and part names to the 2D engineering drawing. - Design must be suitable for later FEA and prototype manufacturing.
Parameters
| Name | Value | Range |
|---|---|---|
| Housing Length | 60 mm | 30 – 150 |
| Housing Width | 50 mm | 30 – 150 |
| Housing Height | 30 mm | 10 – 80 |
| Wall Thickness | 4 mm | 2 – 10 |
| Base Flange Margin | 12 mm | 4 – 30 |
| Base Flange Thickness | 5 mm | 2 – 15 |
| Mounting Hole Dia (4x) | 4.5 mm | 2 – 10 |
| Mounting Hole Inset | 8 mm | 3 – 25 |
| Output Shaft Bore in Housing | 8 mm | 4 – 30 |
| Motor Body Dia | 28 mm | 10 – 60 |
| Motor Body Length | 30 mm | 10 – 90 |
| Motor Shaft Dia | 4 mm | 2 – 12 |
| Motor Shaft Length | 12 mm | 3 – 40 |
| Gear Module (VERIFY) | 1 mm | 0.3 – 4 |
| Pinion Teeth (VERIFY undercut) | 10 teeth | 6 – 40 |
| Pinion Face Width | 8 mm | 3 – 30 |
| Pinion Bore | 4 mm | 1 – 20 |
| Main Gear Teeth | 40 teeth | 12 – 120 |
| Main Gear Face Width | 10 mm | 3 – 40 |
| Main Gear Bore | 6 mm | 2 – 30 |
| Output Shaft Dia | 6 mm | 3 – 20 |
| Output Shaft Length | 50 mm | 15 – 140 |
| Bracket Plate Size | 50 mm | 25 – 120 |
| Bracket Plate Thickness | 5 mm | 2 – 20 |
| Bearing Boss OD | 34 mm | 20 – 80 |
| Bearing Boss Length (each side) | 12 mm | 2 – 40 |
| Bearing Seat Depth | 7 mm | 2 – 30 |
| Bracket Mount Hole Dia (4x) | 4 mm | 2 – 10 |
| Bearing Outer Dia | 25 mm | 10 – 60 |
| Bearing Bore | 6 mm | 2 – 30 |
| Bearing Width | 7 mm | 2 – 30 |
| Index Plate Radius | 30 mm | 12 – 80 |
| Index Plate Thickness | 5 mm | 2 – 20 |
| Index Locking Hole Dia | 5 mm | 2 – 15 |
| Index Hole Pitch Radius | 22 mm | 6 – 70 |
| Locking Pin Dia | 5 mm | 2 – 15 |
| Locking Pin Engagement | 10 mm | 3 – 40 |
| Locking Pin Travel | 12 mm | 0 – 40 |
| Locking Pin Head Dia | 8 mm | 3 – 20 |
| Locking Pin Head Thickness | 3 mm | 1 – 10 |
| Spring Outer Dia | 8 mm | 4 – 25 |
| Spring Free Length | 20 mm | 5 – 60 |
| Spring Wire Dia | 1 mm | 0.3 – 4 |
| Spring Active Coils | 8 coils | 3 – 30 |
| Spar Adapter Length | 40 mm | 15 – 100 |
| Spar Adapter Width | 35 mm | 15 – 100 |
| Spar Adapter Thickness | 3 mm | 1 – 15 |
| Adapter Hinge Hole Dia | 6 mm | 2 – 20 |
| Adapter Spar Hole Dia | 12 mm | 4 – 40 |
| Adapter Hole Spacing | 24 mm | 6 – 90 |
| Exploded Layout Gap | 70 mm | 30 – 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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