Vehicle-Activated Farm Gate Ramp

Create a parametric 3D CAD model of a heavy-duty vehicle-activated farm gate ramp for an agricultural vehicle-access system. Design requirements: Overall ramp length: 1500 mm Overall ramp width: 1000 mm Approximate structural depth: 100 mm Designed for vehicles up to 4000 kg Design vehicle load: 51 kN including a preliminary 1.3 dynamic/impact factor The ramp must be strong enough for repeated vehicle loading. Use structural carbon steel equivalent to S355 for the main structure. Construct the ramp from rectangular hollow section (RHS) steel beams: Main longitudinal beams: RHS 100 × 50 × 5 mm Use two main longitudinal beams. Add transverse RHS 50 × 50 × 5 mm support members. Add a steel top plate or heavy-duty anti-slip steel deck suitable for vehicle tyres. Include anti-slip surface features. Provide adequate spacing between cross members while maintaining structural stiffness. At both sides of the ramp, provide robust pivot/support brackets that allow the ramp to rotate approximately 10–20 degrees when a vehicle drives over it. Include: Pivot shaft/bearing locations Reinforced pivot plates Linkage attachment bracket underneath the ramp Gusset plates around highly loaded joints Rounded external edges where appropriate Holes for pivot pins and linkage connections Welding-ready joints Practical manufacturing clearances The ramp should operate as a mechanical trigger. When the vehicle wheel load is applied, the ramp rotates downward and transfers motion through a linkage mechanism to open the farm gate. Make the model fully parametric and editable. Clearly define the major dimensions. Use millimetres. Provide: Isometric 3D view Top view Front view Side view Overall dimensions Pivot locations Linkage attachment location Material specification The model should be suitable for later assembly with a farm gate, linkage, shaft, springs and hydraulic dampers. Prioritise manufacturability and realistic steel fabrication rather than decorative features.

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