Direction of rotation of driven gear & driving gear for even number of idler gears

Q.  In simple gear trains the direction of rotation of driven gear is opposite to the direction of rotation of driving gear only if______
- Published on 01 Sep 15

a. even number of idler gears are present
b. odd number of idler gears are present

ANSWER: even number of idler gears are present

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    Discussion

  • Sravanthi   -Posted on 06 Nov 15
    - An idler is placed between driving and driven gear in a simple gear train. These idler gears are used to obtain large centre distance between driving and driven shafts and also to obtain desired direction of rotation of the driven shaft.

    - This idler gear is inserted between driving and driven gear and used for supporting purpose.

    - The direction of rotation of driven gear is opposite to direction of rotation of driving gear, if even number of idler gears are used such as 2, 4, etc.

    - The direction of rotation of driven gear is same as driving gear, if odd number of idler gears are used such as 1, 3, 5, etc.

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