Bushing having rotatable inner elements and stabilizer bar assembly having the same

A stabilizer bar assembly which comprises a bushing having rotatable inner elements, the stabilizer bar assembly comprising:

• a pair of rods for coupling to a vehicle body through a bracket, with an interval provided therebetween;
• the bushing having rotatable inner elements comprising:
• an outer housing connected to lower ends of rods connected to the vehicle body;
• an outer rubber formed of a buffer material and attached on the inner surface of the outer housing;
• a first inner housing disposed in the outer rubber;
• a second inner housing disposed in the first inner housing to be rotated with respect to the first inner housing;
• an inner rubber formed of a buffer material, disposed in the second inner housing, and being in contact with a surface of the stabilizer bar;
• and
• a retainer ring formed in a partially-cut ring shape such that the diameter thereof is increased, disposed between the first and second inner housings, and pressurizing the second inner housing toward the inner rubber, wherein the bushing is coupled to each of lower ends of the rods;
• and
• a stabilizer bar formed in a widthwise direction of the vehicle body, having end portions which are bent in a longitudinal direction of the vehicle body such that both ends thereof are connected to the vehicle body, and inserted and fixed to the bushing.