Motor assembly and manufacturing method thereof

A method of manufacturing a motor assembly, the method comprising:

• mounting a first bearing on a rotating shaft;
• mounting a second bearing on the rotating shaft;
• inserting an elastic member in a bearing bracket;
• inserting the rotating shaft having the first and second bearing mounted thereon in the bearing bracket such that the rotating shaft extends through the bearing bracket, the first and second bearings are seated on the bearing bracket, and the second bearing contacts with the elastic member;
• and
• mounting a separation preventing holder on an outer surface of the bearing bracket such that at least a portion of the separation preventing holder covers the first bearing axially along a rotational axis of the rotating shaft and covers the outer surface of the bearing bracket,
• wherein the elastic member is inserted between the second bearing and the bearing bracket to bias the second bearing toward the first bearing.

A method of manufacturing a motor assembly, the method comprising:

• mounting a first bearing on a rotating shaft;
• mounting a second bearing on the rotating shaft;
• inserting the rotating shaft having the first and second bearing installed thereon in a bearing bracket such that the rotating shaft extends through the bearing bracket and the first and second bearings are seated on the bearing bracket;
• inserting an elastic member in the bearing bracket such that the first bearing contacts with the elastic member;
• and
• mounting a separation preventing holder on the bearing bracket such that at least a portion of the separation preventing holder covers the elastic member axially along a rotational axis of the rotating shaft,
• wherein the bearing bracket further comprises an installation groove recessed from an inner circumference of the bearing bracket, and wherein the separation preventing holder is elastically deformable by an externally applied force, and
• wherein the method further comprises:
• engaging the separation preventing holder with the installation groove while the separation preventing holder is deformed.