Vibration absorber for a vehicle suspension spring
A dynamic vibration absorber for a vehicle suspension system includes a spring elastically supporting a vehicle body on a vehicle frame, the spring including multiple coils, an isolator secured to at least one of the coils, at least a portion of the isolator being elastically displaceable in response to movement of one of the coils, and a mass formed as unit with the isolator portion, and supported on the isolator for elastic movement.
1. A dynamic vibration absorber for a vehicle suspension system, comprising:
a spring elastically supporting a vehicle body on a vehicle frame, the spring including multiple coils;
an isolator secure to only one of the coils, at least a portion of the isolator being elastically displaceable in response to movement of the coils; and
a mass formed as a unit with the isolator and supported on the isolator for elastic flexural movement relative to the coil; and
wherein the isolator is formed with first and second spaced holes, said one coils engaged in the first hole, the second hole extends radially outward from the coil, the mass being engaged in the second hole, said movement of the mass producing flexure in the isolator.
2. The absorber of claim 1 wherein the isolator is of molded elastomer and the mass is molded integrally in the elastomer.
3. The absorber of claim 1 wherein the mass changes a natural frequency of the spring as compared to the natural frequency of the spring without the isolator being secured to the coils.