Silencer for a multi-leaf spring

A leaf spring assembly comprising:

• plural leaf springs layer adjacent each other;
• and
• a silencer disposed between the adjacent leaf springs at an end portion of the leaf spring assembly;
• wherein an end portion of one of the leaf springs has a hole,
• the silencer comprising:
• a multilayer structure in which layers proximate to each other are integrally injection modled and each layer is comprised of a resin or an elastomer;
• and
• a projection portion that is formed at one outermost layer of the multilayer structure and closely fitted into the hole formed in the leaf spring,
• wherein the one outermost layer has a tensile strength higher than another outermost layer of the multilayer structure,
• wherein the another outermost layer has a hardness lower than the one outermost layer, and
• wherein the projection portion has an engaging portion that projects from the hole of the leaf spring and engages with a surface of the leaf spring, wherein
• the projection portion has a cylindrical portion having a uniform inner diameter at an end side of the projection portion, the cylindrical portion including a columnar hole at a front end surface of the projection portion, and the cylindrical portion has plural slits opening from an outer peripheral surface to an inner peripheral surface of the cylindrical portion and extending toward an axial direction, and
• the cylindrical portion has a tapered front end portion with a diameter that decreases toward a front end side of the cylindrical portion, and has a base end portion in which the engaging portion is formed, the engaging portion having a contacting surface substantially perpendicular to an axis of the cylindrical portion and contacting the leaf spring.