Gear Train Speed Ratio Definition
A gear train involves multiple gears transmitting rotational motion. The gear providing the input motion is called the driver, and the gear receiving the output motion is the driven gear.
Calculating the Speed Ratio
The speed ratio in a gear train compares the rotational speed of the input (driver) to the output (driven). The correct formula defines this relationship as:
Speed Ratio = Speed of Driver / Speed of Driven
This ratio tells us how the speed changes from the input shaft to the output shaft.
Analysis of Options
Evaluating the given options:
- Option 1: Speed of driver/speed of driven - This correctly represents the speed ratio.
- Option 2: Speed of driven/speed of driver - This is the inverse of the speed ratio.
- Option 3: Number of teeth on driver/number of teeth on driven - This represents the inverse of the speed ratio. The relationship is: Speed Ratio = (Number of teeth on driven gear) / (Number of teeth on driver gear).
- Option 4: None of these - Incorrect because Option 1 is correct.
Thus, the speed ratio is accurately expressed as the division of the driver's speed by the driven's speed.
Important Questions from Gear Trains
In a Gear Train of n wheels, the speed ratio is defined as
The Interference or undercutting in involute gears can be avoided by:
In gears, interference takes place when _____.
The radius that connects the root circle to the profile of the tooth is known as ________.
In an involute gear, the base circle must be ____.
