Leaf spring device for suspension system for vehicle

A leaf spring device for a suspension system for a vehicle, the leaf spring device comprising:

• a center leaf spring;
• side leaf springs respectively disposed at two opposite sides of the center leaf spring;
• and
• bracket modules, each of the bracket modules comprising a center bracket configured to accommodate an end of the center leaf spring, and a side bracket connected to the center bracket and configured to accommodate an end of a side leaf spring, wherein the center bracket and the side bracket are separate and rigidly coupled by a fastening part that prevents relative movement between the center bracket and the side bracket, wherein the center bracket comprises:
• a center bracket body connected to the side bracket;
• a center accommodation part disposed on the center bracket body and configured to accommodate the center leaf spring, the center accommodation part having a first side opened so that the center leaf spring is inserted into the center accommodation part;
• a center shim accommodated in the center accommodation part and configured to adjoin the center leaf spring;
• and
• a center cover coupled to the center accommodation part by center fastening parts to close the opened first side of the center accommodation part, wherein the center cover includes center cover through holes, the center fastening parts are configured to be inserted into the center cover through holes and penetrate the center cover,
• wherein the center bracket further comprises a center shim fastening part configured to penetrate the center accommodation part and be fastened to the center shim so that the center shim presses the center leaf spring.