Drive device for a fan module

Abstract

A drive device for a fan module comprises an electric motor, a housing and a vibration damper for fastening the electric motor to the housing in a manner which damps vibrations. The electric motor has a radial engagement element for engaging into the vibration damper, and the housing has a radial recess for receiving the vibration damper. Here, the vibration damper frames the engagement element in the radial direction thereof.

1 . A drive device ( 110 ) for a fan module ( 100 ), said drive device ( 110 ) comprising the following:
 an electric motor ( 115 );   a housing ( 120 ); and   a vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) for fastening the electric motor ( 115 ) to the housing ( 120 ) in a manner which damps vibrations;   wherein the electric motor ( 115 ) has a radial engagement element ( 145 ) for engaging into the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ),   and the housing ( 120 ) has a radial recess ( 135 ) for receiving the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ), characterized in that   the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) frames the engagement element ( 145 ) on a radial section.   
     
     
         2 . The drive device ( 110 ) according to  claim 1 , characterized in that the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) is formed such that a spring stiffness of said vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) along the circumferential direction of the electric motor is less than parallel to the rotational axis of the electric motor ( 115 ). 
     
     
         3 . The drive device ( 110 ) according to  claim 1 , characterized in that the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) has a radial cut-out with regard to a shape of the recess ( 135 ) in order to reduce a contact surface to the recess ( 135 ) in the circumferential direction of the electric motor ( 115 ). 
     
     
         4 . The drive device ( 110 ) according to  claim 1 , characterized in that the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) is shaped such that a radial outer side of said vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) is curved in order to rest against a section of the housing ( 120 ). 
     
     
         5 . The drive device ( 110 ) according to  claim 1 , characterized in that the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) is shaped such that a periphery located in the circumferential direction of the electric motor ( 115 ) rests in a planar fashion against a corresponding periphery of the recess ( 135 ). 
     
     
         6 . The drive device ( 110 ) according to  claim 1 , characterized in that the engagement element ( 145 ) comprises a round metal web which is fastened to a pole pot ( 205 ) of the electric motor ( 115 ). 
     
     
         7 . The drive device ( 110 ) according to  claim 6 , characterized in that the metal web ( 145 ) is upset on one end, wherein the upset end is disposed between the pole pot ( 205 ) and a flux-return ring ( 210 ) of the electric motor ( 115 ). 
     
     
         8 . The drive device ( 110 ) according to  claim 1 , characterized in that the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) is symmetrically shaped with respect to a rotation about a radius of the electric motor ( 115 ). 
     
     
         9 . The drive device ( 110 ) according to  claim 1 , characterized in that provision is made for a cover ( 125 ) which axially closes the housing ( 120 ), wherein the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) is held in the axial direction in a form-fitting manner between a limitation of the recess ( 135 ) and the cover ( 125 ). 
     
     
         10 . A method ( 900 ) for producing a drive device ( 110 ) according to  claim 6  comprising the following steps:
 inserting ( 905 ) the metal web ( 145 ) through a corresponding cut-out in the pole pot ( 205 ); 
 inserting ( 910 ) the flux-return ring ( 210 ) into the pole pot ( 205 ); 
 connecting ( 915 ) the flux-return ring ( 210 ) to the pole pot ( 205 ); 
 sliding ( 920 ) the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) onto the metal web ( 145 ); and 
 inserting ( 925 ) the electric motor ( 115 ) into the housing so that the vibration damper ( 135 ,  300 ,  400 ,  600 ,  800 ) is received in the recess ( 135 ) of the housing ( 120 ).