PACE Collaborative Project: Emerging Market Vehicle Transmission Design Team member: Anthony Smith Kevin Scott Decorian Harris Jacque Thornton Advisor: Dr. Xiaobo Peng Department of Mechanical Engineering Prairie View A&M University, Prairie View, Texas
Outline Project Goal and Objectives Project Planning Detailed System Design Results Conclusion and Recommendations
Goals and Objectives Suitable for an emerging market Inexpensive to produce High fatigue safety factor High strength capacity Ability to handle high torque and horsepower Lightweight Allowance for ample clearance Should operate under extreme conditions GOAL: To develop an efficient transmission/gearbox design to suit the needs of the emerging market vehicle.
Constraints on Transmission Length: 300 mm maximum Width: 350 mm maximum Height: 300 mm maximum Weight according to total weight of vehicle.
Project Management: Gantt Chart
Gear Train: Calculation Equations Minimum Number of Teeth Gear Diameter Number of Revolution Safety Factor Torque Velocity Transmitted Load
Design Calculations Using a creditable machine design textbook, calculation for tooth number, safety factors, bending, wear, and stress were done. 7 Tooth Number Minimum [Teeth] Tooth Number Used [Teeth] Diameter of Gear [ in] Revolution of Gears [Rev / min] Safety FactorsGear Ratio Used Gear 2 Gears for 1st Gear Gear Gear 4 Gears for 2nd Gear Gear Gear 6 Gears for 3rd Gear Gear Gear 8 Gears for Reverse Gear Gear 10 Gears for 4th Gear Gear
Gear Design & FEA Analysis
Shaft Design Reverse shaft Input shaft Output shaft
Housing Bottom housing Upper housing
Other Major Components Synchronizer Reverse engager shaft Slider for synchronizerSynchronizer engager
Other Major Components Bearing gasket Engager shaft Bearing
Transmission Assembly
Results Design is created to fit constraints. Design was verified by FEA. It is a safe transmission design.
Conclusion & Recommendations Developed a successful design Better communication between Universities involved Obtaining up to date software