Patent ID: 6507135
Filing Date: 2003-01-14
Classification: F04D

Abstract:
An axial fan comprising:a housing having a bottom part; an external-rotor drive motor having an external rotor with a rotor shaft and an internal stator, wherein said external rotor is configured to rotate about said internal stator during operation of said external-rotor drive motor; a fan wheel configured to be driven by said external rotor; a bearing support tube arranged in said internal stator: a radial plain bearing arranged in said bearing support tube and supporting said rotor shaft; an axial bearing formed by a free end of said rotor shaft and a stationary counter member against which said free end of said rotor shaft rests, wherein said stationary counter member comprises a thrust element and an elastomeric shaped member, wherein said thrust element is connected to said elastomeric shaped member; wherein said elastomeric shaped member is arranged between said bottom part of said housing and said bearing support tube; and wherein said elastomeric shaped member has a projection on a side facing said thrust element and said thrust element is axially supported on said projection, wherein said elastomeric shaped member is configured to be elastically deformable when impacts act on said thrust element in order to absorb, at least partially, the impacts.