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B&D LI2000 SCREWDRIVER PROJECT

Aaron Pan

Overview

The purpose of this project was to reverse engineer how components work together in a Black and Decker Li2000 screwdriver. Once taken apart, I identified and learned how certain aspects of the screwdriver work together. 

Screwdriver Deconstruction

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The first step in the process was to deconstruct the screwdriver and make sense of the parts. After deconstruction, a product structure was made.

Gearbox Analysis

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The Black and Decker Li2000 screwdriver consists of a 2-stage epicyclic gear train which increases the torque from the compact motor.

Mechanism Analysis

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There are 3 main user-controlled mechanisms in the screwdriver: the pivot lock, forward/reverse switch, and the screwdriver locking gear.

Design for Manufacture Assembly

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Design for manufacturing assembly (DMFA) or "mistake-proofing" is the process of modifying a design so that it can reduce manufacturing error in production, which also makes manufacturing more efficient in mass production.

What I learned

The most interesting thing that I learned from this project was how torque can be multiplied in an extremely compact way using epicyclic gear trains. Additionally, I gained knowledge on differing gear trains and their applications.

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