2-Speed Gearbox
2-Speed Gearbox
Project Overview: This project aims to create a 2-speed gearbox with neutral. The Project will include a gear system, a belt system, and a shifting mechanism.
Team Members: Kefan Wu, Johnathan Sun, Matthew Kwon
Objectives:
Build a 2-speed gearbox
Functional transmission system
Ensure smooth shifting and rotation
Learn to use shop machines
Time management: finish 24 hours ahead
Outcome:
We successfully made a functional 2-speed gearbox. The shifting and transmission mechanism runs smoothly and consistently. We also made some parts detachable to meet the size constraint.
Selector Fork: Translate the rotational motion of the shifting knob to the tranlational motion of the gear selector
Mechanisms
Selector: Slide onto the gear slectors to select the first and the second gear or neutral
Helica Gear: More contact area between the teeth of the gear, ensuring smooth power transfer
Challenges & Solutions
Tolerance: Our gearbox requires high-precision fabrication to ensure smooth switching. Some of our parts do not integrate properly due to tolerance issues
Solution: We printed three iterations with different tolerances (+- 0.5mm, +- 1mm, +- 0.25mm) to test the integration of the mechanism and found the best tolerance for each part
Integration: We designed 53 parts in total for this project. It’s hard to put all of them together due to limited space, and we must follow a certain order of assembly
Solution: We figure out the proper assembly order during the test fittings and mapped out the process in SolidWorks before we actually assemble the gearbox