An elastomeric isolator has an elastomeric body which defines a void extending into the elastomeric body from one side and a void extending into the elastomeric body from the opposite side. One member for attaching the elastomeric body to a component is located inside of the two voids and another member for attaching the elastomeric body to a component is located outside of the two voids. The two voids overlap a specified distance to determine the stresses and stiffness for the isolator.
1. An isolator comprising:
an elastomeric body;
a first member defined by the elastomeric body for attaching the elastomeric body to a first component;
a second member for attaching the elastomeric body to a second component; wherein
the elastomeric body defines a first annular void encircling only the first member, the first annular void extending in a first direction into the elastomeric body from an outer surface of a first side of the elastomeric body;
the elastomeric body defines a second annular void encircling only the first member, the second annular void extending in a second direction opposite to the first direction into the elastomeric body from an outer surface of a second side of the elastomeric body opposite to the first side;
the first annular void overlaps the second annular void by a specified overlap in an overlap direction generally perpendicular to the first direction.
2. The isolator according to claim 1 , wherein said first member comprises a first hole extending through said elastomeric body generally parallel to the first direction.
3. The isolator according to claim 2 , wherein said second member is a second hole extending through said elastomeric body generally parallel to the first direction.
4. The isolator according to claim 3 , further comprising an insert disposed within the elastomeric body, the insert encircling the first and second annular voids.
5. The isolator according to claim 4 , wherein the insert encircles the first and second hole.
6. The isolator according to claim 2 , further comprising an insert disposed within the elastomeric body, the insert encircling the first hole.
7. The isolator according to claim 2 , wherein said second member is a bracket disposed around the first and second voids.
8. The isolator according to claim 7 , further comprising an insert disposed within the elastomeric body, the insert encircling the first hole.
9. The isolator according to claim 2 , wherein said second member is a pair of holes extending through the elastomeric body generally parallel to the first direction.
10. The isolator according to claim 9 , further comprising an insert disposed within the elastomeric body, the insert encircling the first hole.
11. The isolator according to claim 1 , wherein said second member is a bracket disposed around the first and second voids.
12. The isolator according to claim 1 , further comprising an insert disposed within the elastomeric body, the insert encircling the first hole.
13. The isolator according to claim 1 , wherein said second member comprises a pair of holes extending through said elastomeric body generally parallel to the first direction.
14. The isolator according to claim 13 , wherein said second member is a bracket disposed around the first and second voids.
15. The isolator according to claim 1 , wherein the first annular void is asymmetric in relation to the first member.
16. The isolator according to claim 15 , wherein the second annular void is asymmetric in relation to the first member.
17. The isolator according to claim 1 , wherein the first annular void is concentric with the first member.
18. The isolator according to claim 17 , wherein the second annular void is concentric with the first member.
19. The isolator according to claim 1 , further comprising an insert disposed within the elastomeric body, the insert encircling the first and second member and encircling the first and second annular void.