Gears and transmission
Oscillating Spray Nozzle Crank-Rocker Assembly (Exploded)
- Bounding box
- 1781.5 × 120.0 × 110.0 mm
- Engine
- Precision B-rep
- Parameters
- 49
- Published
- September 24, 2026
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The prompt
Create a 3D CAD model and motion simulation of an industrial oscillating spray nozzle system using a crank rocker mechanism. Design a four-bar crank rocker linkage that converts continuous motor rotation into a left-right oscillating spray nozzle movement, similar to an automatic vehicle washing system. MECHANISM REQUIREMENTS: - Input: DC geared motor rotating continuously 360°. - Output: spray nozzle arm oscillates left and right. - Total nozzle sweep angle: approximately 180° (-90° to +90°). - The spray nozzle must always point downward during operation. DIMENSIONS: 1. Motor crank: - Crank radius R = 25 mm. - Crank rotates 360° continuously. 2. Connecting rod: - Center-to-center length L2 = 120 mm. 3. Rocker arm: - Distance from rocker pivot to connecting point L3 = 40 mm. 4. Ground distance: - Distance between motor shaft center O1 and rocker pivot center O2: L4 = 100 mm. ASSEMBLY: Create these components: - DC geared motor and shaft. - Eccentric crank disk with 25 mm offset pin. - Connecting rod with pivot joints. - Rocker arm mounted on fixed pivot. - L-shaped spray nozzle holder. - Rotary swivel joint for nozzle. - Downward-facing spray nozzle. MECHANISM LAYOUT: Motor shaft (O1) | | Crank (R=25mm) | Connecting rod (L2=120mm) | Rocker arm (L3=40mm) | Spray nozzle holder MOTION SIMULATION: Simulate motor rotation: 0° → 90° → 180° → 270° → 360° Expected nozzle movement: 0°: Nozzle center position. 90°: Nozzle swings to right. 180°: Nozzle returns through center. 270°: Nozzle swings to left. 360°: Returns to starting position. SIMULATION OUTPUT: Show: - 3D assembly. - Exploded view. - Motion animation. - Rocker angle measurement. - Nozzle sweep angle. - Angular velocity. - Interference checking. OPTIMIZATION: Adjust linkage dimensions if required to achieve approximately ±90° rocker movement while maintaining: - smooth motion - no locking points - compact design - sufficient motor torque Label: O1 = motor center O2 = rocker pivot R = crank radius L2 = connecting rod length L3 = rocker length L4 = center distance
Parameters
| Name | Value | Range |
|---|---|---|
| Base Plate Length | 180 mm | 120 – 260 |
| Base Plate Width | 120 mm | 80 – 200 |
| Base Plate Thickness | 10 mm | 5 – 20 |
| Ground Distance O1-O2 (L4) | 100 mm | 60 – 150 |
| Mounting Hole Dia | 5 mm | 3 – 10 |
| Motor Body Square | 42 mm | 30 – 70 |
| Motor Body Length | 80 mm | 50 – 140 |
| Motor Shaft Dia | 8 mm | 5 – 14 |
| Motor Shaft Length | 25 mm | 10 – 50 |
| Crank Disk Dia | 60 mm | 40 – 100 |
| Crank Disk Thickness | 8 mm | 4 – 16 |
| Crank Radius R | 25 mm | 10 – 40 |
| Crank Pin Dia | 8 mm | 5 – 14 |
| Crank Pin Length | 12 mm | 6 – 25 |
| Crank Bore Dia | 8 mm | 5 – 16 |
| Connecting Rod Length L2 | 120 mm | 80 – 180 |
| Rod Width | 12 mm | 8 – 24 |
| Rod Thickness | 6 mm | 3 – 14 |
| Rod Pivot Hole Dia | 8 mm | 5 – 14 |
| Rocker Pivot-to-Pin L3 | 40 mm | 20 – 70 |
| Rocker Pivot-to-Output Length | 80 mm | 50 – 140 |
| Rocker Width | 15 mm | 10 – 30 |
| Rocker Thickness | 8 mm | 4 – 16 |
| Rocker Pivot Bore Dia | 10 mm | 6 – 18 |
| Rocker Pin Bore Dia | 8 mm | 5 – 16 |
| Rocker Output Hole Dia | 8 mm | 4 – 14 |
| Pivot Shaft Dia | 10 mm | 6 – 20 |
| Pivot Shaft Length | 30 mm | 15 – 60 |
| Bracket Plate Length | 40 mm | 25 – 70 |
| Bracket Plate Width | 30 mm | 20 – 60 |
| Bracket Plate Thickness | 10 mm | 5 – 20 |
| Bracket Bolt Hole Dia | 5 mm | 3 – 10 |
| Holder Vertical Leg | 70 mm | 40 – 120 |
| Holder Horizontal Leg | 50 mm | 30 – 100 |
| Holder Width | 20 mm | 12 – 40 |
| Holder Thickness | 5 mm | 3 – 12 |
| Holder Mount Hole Dia | 6 mm | 3 – 12 |
| Swivel Mounting Bore Dia | 12 mm | 6 – 24 |
| Swivel Body Dia | 25 mm | 15 – 45 |
| Swivel Body Length | 35 mm | 20 – 60 |
| Swivel Through Bore Dia | 10 mm | 5 – 20 |
| Inlet Port Boss Dia (1/4 NPT) | 13.7 mm | 8 – 22 |
| Inlet Port Passage Dia | 5 mm | 3 – 10 |
| Nozzle Hex Across Flats | 20 mm | 12 – 36 |
| Nozzle Hex Body Length | 30 mm | 15 – 60 |
| Nozzle Tip Dia | 12 mm | 6 – 20 |
| Nozzle Tip Length | 8 mm | 4 – 18 |
| Orifice Dia | 2.5 mm | 1 – 5 |
| Exploded Layout Gap | 30 mm | 5 – 120 |
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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