ME 360 · Electromechanical Design · Spring 2026

4 - BAR.MECHANISM

4-Bar Mechism Simulation with 2 stationary bearings, crank rocker, and extension link.

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Course
ME 360
Period
Spring 2026
My Role
Classwork Design & Analysis
Tools Used
SolidWorksSimulation3D Modeling
01 — The Project

What was assigned

  • Analyze a four‑bar mechanism to determine motor torque requirements and bearing reaction forces at different speeds. This included identifying the crank angle of maximum torque, comparing torque demands at 20 RPM and 600 RPM, evaluating bearing loads, and explaining conditions that produce negative torque during the motion cycle.
V
03 — Results

What we achieved

🔧

GMaximum motor torque at 20 RPM was 678.01 N·mm, occurring at a crank angle of −66.879° from vertical.

📉

Bearing reaction forces peaked at 16.81 N on the right bearing and 14.22 N on the left bearing.

🔩

At 600 RPM, the mechanism required a maximum motor torque of 10,568.38 N·mm — establishing the minimum torque rating needed for high‑speed operation.

📄

Negative motor torque was observed when link inertia or gravity assisted crank rotation, reducing the required input torque during those portions of the cycle.

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