Gear Drive Basics
Gears are mechanical devices, designed with teeth specifically shaped to minimize wear, vibration, and noise, while also maximizing a power transmission’s efficiency. They are able to reverse the direction of rotation, change the speed of rotation, and transfer rotation to a different axis. This course will describe the purpose, types, performance, and applications of gears.
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Course Details
Learning Objectives
By the end of this course, you will be able to:
- Define the terms gear ratio, gear train, and gearbox
- Identify common gearbox ratings and specifications, including power rating, torque rating, and service factor
- Differentiate between gear types, including spur, helical, bevel, worm, rack and pinion, crown, double helical, hypoid, and planetary gears
- Define the terms pitch, clearance, and backlash
- Describe the role of right-angle drives
- Differentiate between regular worm, double enveloping worm, and dual lead worm gears
- Describe common gearbox issues, including noise and vibration, oil leaks, and overheating
Specs
Frequently Asked Questions
What are the four types of gear trains?
The four types of gear trains are: simple, compound, reverted, and epicyclic.
What is the gear ratio?
The term gear ratio refers to the rates at which the last and first gears rotate. To figure this ratio, the number of teeth of the driven gear is divided by the mating teeth of the driving gear.
What are the most common gear types?
The most common gear types are spur, helical, bevel, worm, rack and pinion, crown, herringbone, spiral hypoid, and planetary.
What are typical problems that can occur with gears?
A number of problems can occur with gears, including noise, wear, and friction loss.
Sample Video Transcript
Although all gears work similarly, they do come in different shapes, and configurations, and have different applications. The most common types of gears include spur, helical, bevel, worm, rack and pinion, crown, herringbone, spiral hypoid, and planetary.
