Since the ends are fixed it would not have any flexibility and thus it cannot compress properly. ![]() Now assume that if both the eyes of the leaf spring are fixed, under such circumstances the leaf spring would compress, but, as it undergoes compression, naturally its ends try to move outwards. When the vehicle goes through bumps on the road, it exerts a force on the leaf spring from below. Image source – Grabcad What is the purpose of a leaf spring shackle? (I recommend watching this minute-long clip) This is because when the spring is being compressed from below, each leaf is supported by the leaf below it, but, when the load is suddenly released it would not find support if not for the rebound clips which hold them together and provide support. when the axle of the automobile undergoes a bump. However, when the force is suddenly removed the leaf spring might fail. The rebound clips are made up of steel bands placed at a certain position on either side of the central clamp and their main function is to prevent the leaf spring from failing during a rebound.Ī leaf spring usually does not break when it is compressed i.e. It consists of U bolts and a central bolt so that the leaves don’t fall apart. The central clamp’s function is to hold all the leaves together. ![]() (refer to figure) The remaining leaves are known as “ graduated leaves“. Just below the master leaf, another almost full-length leaf called the second master leaf is placed to support the master leaf. These rolled ends of the master leaf are known as the eye. ![]() The master leaf has its ends rolled as shown in the figure. The longest leaf of the leaf spring is known as the “master leaf”. The leaves are given a curvature called the camber which gives the leaf spring its semi-elliptic look. The leaf spring consists of a number of metal plates also known as leaves layered upon each other in the decreasing order of their size. Source – Quora Flat metal plates or leaves
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