table of contents linear actuator base arm/elbow joint future plan
Post on 22-Dec-2015
220 Views
Preview:
TRANSCRIPT
Previous Issues:
• Rack and gear meshing slop
• Uniform linear movement through bearings
• Drive motor needs replacement
Improvement Ideas:
• Mount second gear to face of primary gear
• Replace linear roller bearings with sleeve bushings
• Replace motor with higher torque version
Linear Actuator
Gears/ BushingsFasten new gear to primary gear to increase contact area of gear to linear rack
Chose sleeve bushing to increase surface contact on rack to increase stability
Will reduce twisting and bending slopEliminate linear ball bearing for smoother motion
MotorCurrent motor is inopperable
256:1 Motor ordered to replace the 64:1 motor previously in place.
Higher Torque, but lower speed
Arm/Elbow Problems
1/8in armsArm twists too muchNot rigid enough assembly
Elbow helical gearsCreates lateral loads on armLow gear ratio results in small torque
increasesExposed gearing picks up debris
Quick Fix Ideas Channel Arm Idea
Lighter, strong, resists torsion, but hard to make
Square Tube IdeaHeavier, strong, and
easier to make
Test Assembly: Chipping Rock
Goal: Replace the linear actuator with a more powerful assembly to break rock.
top related