September 29, 1999
Clients: Dr. Dan Whitney
Project Team:
Name
|
E-mail
|
Agus Sudjianto
|
asudjian@ford.com
|
Jared Clark
|
jclark15@ford.com
|
Milind Oak
|
moak@ford.com
|
Gaurav Shukla
|
Gaurav@mit.edu
|
Eiichi Tanabe
|
eitanab@ibm.net
|
The team decided to analyze Sears/Craftsman 3.6-Volt Cordless Screwdriver. The product has dual-position handle design: in-grip position to work in confined areas which can be easily converted into pistol-grip for normal screw-driving tasks.
The followings are some notable features of the product:
Two-speed, 130 and 400 RPM, with 2-speed gear box to match the need for applications of high speed fast screw-driving and low-speed high-torque heavy duty screw-driving.
Planetary spur gears to provide the torque and power needed.
Adjustable torque clutch to match driving torque task
Trigger switch for reverse-off-forward control.
Impact resistant glass-filled nylon housing.
¼-in. hex collet with automatic spindle lock.
3.6-volt 3-cell rechargeable batteries.
Power supply to recharge the batteries.
NOTE:
The battery charger sub-system is excluded from this study.
Sum of the sub-assembly such as motor may be treated as a module.
| |
