Nabil Abdel-Shehid Engineering Design Portfolio
Drive train
Overview
This year we wanted to make some changes to the drivetrain. Firstly, we changed from a 6-wheel tank drive system to a 4-wheel drive system in preparation for our Swerve drive.
Connects the wheels to the chassis and to the differential bar.
Mounts each wheel to the rocker and protects the motor housing.
Rocker arm
Overview
My goal for the rocker arm was to connect the wheels to the chassis as well as make a connection to the differential bar that sits atop the rover. Firstly, the connection to the main chassis will be through a 3D-printed SLS block made of nylon. This will be coupled on either side by an aluminum tube which will be bored through 3 times towards the center, where another set of SLS blocks will encase it which will they themselves also be encased in aluminum sheets for rigidity.
Lastly, there is the differential bar mount. The differential will ensure the connection of the left and right rockers whilst also supplying chassis stabilization, preventing excessive rocking or tipping. To create this connection, two 6061 aluminum plates have been utilized to cradle the rocker at the center around the SLS block. One wrapping beneath and the other being seated on top. They will be outfitted with mechanical 4 mechanical standoffs so they stay in compression while under load. The load which will be applied directionally by the tension caused by the differential bar.
The rocker was put under a static load with a safety factor of two and experienced insubstantial displacement in accordance with our expected ranges.
- SolidWorks
- Static FEA
- SLS
Wheel mount
Overview
Our wheel mount design took inspiration from the NASA Perseverance design.
My goals were to mount the wheels onto the rocker and protect the motor housing. To accomplish this, I designed 3 curved load-bearing plates: two 6061 aluminum plates sandwiching a piece of waterjet-cut 6061 aluminum sheet metal.
The sheet metal is there to protect the motor. It sits between the two plates and protects the motor from surrounding debris, structures and impacts. It does not bear the load.
The 6061 aluminum plates carry the load, sitting on either side of the sheet metal to constrain it. Loads from the wheel make their way up and through to the rocker arm, meaning they make up the connection from the ground to the rocker.
Both assemblies were subjected to static load simulations with a safety factor of 2 and experienced displacements within our acceptable range.
- SolidWorks
- Static FEA
- Load-bearing design
About
Hi, my name is Nabil Abdel-Shehid. I am a mechanical engineering student at Toronto Metropolitan University with an interest in product design and testing.
In my time at TMU I joined METRobotics (formerly Ryerson Rams Robotics), our school’s University Rover Challenge competition team, as a member of the mechanical subteam. I’ve worked on both the science and drivetrain subteams.
In my time with the team I have gained and applied knowledge in SolidWorks, ANSYS, DFM, DFA, and GD&T.
I am currently looking for an internship for summer 2027.
Education
- Mechanical Engineering, Toronto Metropolitan University
- Mechanical Engineering Technology, Georgian College
Tools
- SolidWorks and ANSYS
- DFM, DFA and GD&T
Contact
I’m looking for a mechanical engineering internship for summer 2027.
- Emailnabdelshehid@gmail.com
- Phone1 (647) 887-1646
- LinkedInlinkedin.com/in/nabil-abdel-shehid