Greg DElia

1
TEAM MAXIMUM OVERDRIVE

• Greg DElia
• Eric Mace
• Matt Mason
• Matt Wagner

2
Project Goals

• Design manufacture sealed gearboxes
• Minimal weight
• Low noise
• High durability
• Minimal volume
• High speed maneuverability
• Design preliminary turret system
• Support HK G36c Assault Rifle
• House vision system and necessary hardware

3
Component Selection

• Gears (3.331 red.)
• Helical
• High strength
• Low noise
• Comparable weight to spur gears

• Shafts
• Titanium
• Light weight
• Excellent strength

• Bearings
• Deep groove ball bearings
• Light weight
• Support thrust loads

• Gearbox
• .75 Aluminum
• .050/.010 Titanium
• Light weight
• Sufficient Strength

4
Gearbox Layout
5
Gearbox Assembly
6
Gearbox Assembly
7
Gearbox Assembly
8
Gearbox Assembly
9
Gearbox Assembly
10
Gearbox Assembly
11
Mass Budget - Gearbox
12
Preliminary Turret Design

• Turret ring incorporated into top deck of hull
• Vertical loads supported by bearing at base
• Radial loads supported by roller bearings
• Electronics capability through slip rings
• 360o turret rotation
• 45o weapon pitch adjustment

13
Preliminary Turret Design
14
Summary

• Aluminum and Titanium construction for low weight
• Helical Gears for quiet operation
• Final gear ratio of 3.331 gives high top speed
  and adequate torque
• Gearbox manufacturing is complete
• Preliminary turret design to be delivered,
  possible mock-up turret, by 4/28/05

15
Recommendations

• Lightening holes in gears could significantly
  reduce overall weight of gearbox.
• Neoprene motor mounts were tested, but a stiffer
  material would yield better results.
• Oil sealing is a challenge try a gasket sealing
  system and/or O-rings on the outer races of
  bearings.