EZ-Load Pneumatic Trailer

Case BornAdvisor: Dr. Junkun MaET493 – Senior Design I

Fall 2014

• Motorcycle trailers require ramps• Hard for some people to load• Some trailers require drop hitches to sit

horizontal

Fall 2014

INTRODUCTION

• Utility trailer that is easier to load:

– No ramps needed– Deck lowers to ground– Fully Pneumatic

• Prevents trailer sway– Once raised, trailer will match hitch

height

• Slim profile

Fall 2014

OBJECTIVE

Fall 2014

CHALLENGES/DESIGN– Cant have solid axle– Hub/trailing arm can withstand sideways forces– Slim deck needs to support 2,000~3,000 lbs– Bump stop to prevent trailer to contact ground in case of

failure– Standard trailer hub adapted to custom trailing arm– Main deck that rest on the ground– Fully Pneumatic– Pivoting tongue

• Needs to keep trailer horizontal at all times

DELIVERABLES

Fall 2014

MAIN COMPONENTS

Part Off The Shelf Part

Designed Part Solidworks COMSOL Bending/Stress

Review

Trailer Frame X X X XTrailer Deck X X X X

Trailer Tongue X X Trailing Arm X X X X

Hub X X X XShock Mount X X X X

Air Bag Mount X X X XBearings X X X

Hardware X X X

- COMSOL: o Trailing arm

Mounting points for bag, shock, and trailer frame area Hub area Bolted joints

o Hub o Tongue pivot point/mechanism o All tie down locations

- Solidworks: o Full trailer model (25+ parts) o Compressor/tank/valves (20+ parts) o Airline and electrical line routing o Hubs/tires/rims o Check for any interference/free movement o Complete fabrication/assembly drawings o Automatic BOMs o Total trailer weight and COG o Motion Study

- Calculations: o Bending stresses/ Deflection in all members o Journal stress in hub o Bending and moments in trailing arms o All bolt shearing stress o Maximum weight rating for trailer

TIME LINE

Fall 2014

FALL 2014Completed Proposal and Presentation - October 8, 2014Completed first design - October 31, 2014Completed Final Design - November 17, 2014Complete Calculations - November 26, 2014Completed fabrication/part drawings - November 1, 2014Completed final report and presentation - December 1, 2014

QUESTIONS?

Fall 2014