Patent ID: 7182517

Claim:
An anti-vibration device for a motor bearing, comprising: an axial barrel, having an upper portion and a bottom; a bearing, being disposed in the barrel and located at an upper portion of the barrel; and a shaft with a first end and a second end, the first end being round and extending through the bore in the axial barrel core and the second end joined to the center of a fan wheel; characterized in that the axial barrel has an annular recess at the bottom thereof corresponding to the first end of the shaft with an annular flat surface surrounding the recess and a wearable circular shock retard piece is placed on the flat surface to contact with the first end of the shaft such that the shock retard niece is capable of absorbing upward and downward movements of the shaft resulting from vibration and is deformed elastically and the recess provides a room to comply with elastic deformation of the shock retard piece while the shock retard piece is subjected to an external force due to the vibration.