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The single ratio gearbox motor shown opposite is suitable for model and light industrial applications and has a gear ratio of 100:1 - Leaving Cert Engineering - Question d - 2022
Question d
The single ratio gearbox motor shown opposite is suitable for model and light industrial applications and has a gear ratio of 100:1. Explain what is meant by 100:1 g... show full transcript
Worked Solution & Example Answer:The single ratio gearbox motor shown opposite is suitable for model and light industrial applications and has a gear ratio of 100:1 - Leaving Cert Engineering - Question d - 2022
Step 1
Explain what is meant by 100:1 gear ratio motor.
Answer
A gear ratio of 100:1 indicates that for every 100 revolutions of the input shaft, the output shaft makes only 1 revolution. This means that the output shaft rotates at a speed that is 100 times slower than the input shaft.
For instance, if the input shaft is rotating at 2000 RPM (revolutions per minute), the output shaft would be rotating at:
rac{2000 ext{ RPM}}{100} = 20 ext{ RPM}
This reduction in speed is accomplished through a series of gear reductions in a compound gear train.
Step 2
Describe, with the aid of a diagram, how a pulley may be securely attached to the output shaft of the gearbox motor shown.
Answer
To securely attach a pulley to the output shaft of the gearbox motor, follow these steps:
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Selecting the Pulley: Choose a pulley that is compatible with the diameter of the output shaft.
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Preparing the Output Shaft: Ensure the output shaft is clean and free of any debris. The surface should be smooth to prevent slippage.
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Aligning the Pulley: Position the pulley over the output shaft, ensuring it is aligned properly.
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Securing Mechanism: Use a set screw or clamp to secure the pulley onto the output shaft. Tighten the screw or clamp to achieve a snug fit.
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Diagram: (Insert a diagram illustrating the output shaft with a pulley attached and a set screw in position)
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Final Check: Rotate the pulley by hand to check if it turns smoothly without any wobbling. If necessary, readjust the alignment and secure it again.