MOTION SYSTEM APPLICATIONS
Gears for torque Open gearing Intech Power
| courtesy
and tuning
Gears complement electric motors in industrial and consumer designs. For example, everything from amusement rides to consumer-grade beard trimmers make use of spur gears. These roll through meshing for up to 98% or higher efficiency per reduction. The only caveat is that they exhibit tooth sliding and noise due to initial tooth-to-tooth contact and audible shock loads. Helical gear reducers are costlier upfront than spur sets, but work in designs needing high horsepower and efficiency. Textile machinery, conveyor drives, rolling mills, and elevators all use helical gear teeth to engage gradually over the tooth faces for smooth operation and high load capacity. The only caveat is that the machine setup must include framing or supports to resolve thrust loads originating from the gears. Non-parallel and right-angle gears go into motion applications for material handling, aerospace and defense, packaging equipment and food-processing machinery. Input and output shafts protrude in different directions; gear teeth are worm, hypoid, bevel (straight, spiral or zerol), skew or crossed-axis helical. Common bevel gearsets often go into material-handling and packaging equipment. Hypoid gears (useful for high-toque applications) are like spiral-bevel gearsets, but output and input shaft axes don’t intersect — and that simplifies integration of supports. Common in aerospace, zerol gearsets have curved teeth that align with the shaft to minimize thrust loads.
Middle left: DieQua Corp. PGW Series reducers come in variations that are particularly suitable for belt and leadscrew-driven axes. Ratios are 3:1 to 1,000:1. Backlash is to ≤ 6 arc-min. and efficiency is to 95% or better. The PGW speed reducers are also quiet — generating operating noise that is less than or equal to 63 dB(A). Lower left: Consider a consumer-grade application. The Hoover Rogue 970 robot vacuum is capable of up to two hours of cleaning before recharging. Note the precision geartrain on the wall-edge brush assembly. | HOOVER • Techtronic Industries TTI
50
DESIGN WORLD — MOTION
Gearing - MC 11-19 V5.indd 50
11 • 2019
motioncontroltips.com | designworldonline.com
11/19/19 1:23 PM
