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Leaf Spring Modification

  1. Jan 26, 2016 #1
    Hi.
    If I am going to increase pay load on a truck (within front and rear axle capacity). It is supposed to modify or add leafs in semi-elliptical leaf spring. I want to know what should be the max considerations for doing so?
    Just adding some leafs in suspension can fulfill the requirement?
    or there would be any design practice/calculation that should be followed?
     
  2. jcsd
  3. Jan 27, 2016 #2

    Ranger Mike

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    when you add a leaf you are adding spring rate, just make sure the main leaf can taker your max load..typically we add a spring leaf of length in between the current leafs and only add two or three leafs, more than that make jeaporidize the main leaf
     
  4. Jan 28, 2016 #3
    I am willing to add 2 leaves in total but I am confused where to put them. As it is obvious that a leaf suspension looks like triangular shape, so I am not sure its triangularity would be affected of not? If so then what would be the result? or shall I need to modify other leaves too to maintain its shape?
     
  5. Jan 28, 2016 #4

    Ranger Mike

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    can you post a photo or drawing so we can see the " triangle"...
     
  6. Jan 29, 2016 #5
    IMG_20151207_092206_424.jpg IMG_20151207_092214_024.jpg


    Might be these picture could help you also term "triangle" is just used for reference as it has a uniform shape that looks like a "triangle".
     
  7. Jan 29, 2016 #6

    Ranger Mike

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  8. Jan 29, 2016 #7
    This is the reason it is a "triangle"
    http://www.engineersedge.com/material_science/leaf-spring-design.htm

    Instead of adding leaves, investigate adding an overload leaf, such as seen in the picture at the bottom.
    http://www.torklift.com/index.php/blog/tags/listings/overload-leaf-springs?format=feed&type=rss
    That way your ride is not affecting until you have the very heavy loads you wish to carry.
     
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