Motor and manufacturing method thereof

Abstract

A motor and a manufacturing method thereof. With a motor that includes a stationary member, a rotating member coupled to the stationary member which rotates about an imaginary rotational axis, and a base cover which covers one side of the stationary member and the rotating member, where the base cover is made of a material which can be elastically deformed by pressing to touch the stationary member or the rotating member, deviations from the designed dimensions may be reduced to provide improved precision, by using a base cover made of an elastically deformable material that can be made to touch the shaft by pressing.

1 . A motor comprising:
 a stationary member;   a rotating member coupled to the stationary member and configured to rotate about an imaginary rotational axis; and   a base cover covering one side of the stationary member and the rotating member,   wherein the base cover is made of a material configured to be elastically deformed by pressing to touch the stationary member or the rotating member.   
   
   
       2 . The motor of  claim 1 , wherein the stationary member comprises a sleeve having a penetration hole formed therein, and
 the rotating member comprises a shaft inserted in the penetration hole.   
   
   
       3 . The motor of  claim 2 , further comprising a donut-shaped plate having a first hole corresponding to a cross-section of the shaft, the plate configured to be coupled with the shaft such that the shaft is inserted in the first hole and configured to be mounted on the other side of the sleeve. 
   
   
       4 . The motor of  claim 3 , further comprising a cap covering at least a portion of the plate and mounted on one side of the sleeve. 
   
   
       5 . The motor of  claim 1 , wherein the base cover has a shape corresponding to a shape of one side of the stationary member or the rotating member. 
   
   
       6 . The motor of  claim 1 , wherein a ledge is formed on the stationary member or the rotating member such that one side is sunken in. 
   
   
       7 . The motor of  claim 1 , wherein a ledge is formed on the stationary member or the rotating member such that one side is protruded out. 
   
   
       8 . A method of manufacturing a motor, the method comprising:
 coupling a base cover to a sleeve having a penetration hole formed therein, such that one side of the penetration hole is closed;   inserting a shaft in the penetration hole;   coupling a plate to the shaft such that the shaft is inserted in the plate; and   pressing and coupling a hub to the shaft such that the shaft is inserted in the hub while the base cover is supported in an axial direction of the shaft.   
   
   
       9 . The method of  claim 8 , wherein the pressing and coupling of the hub comprises applying a particular support load such that the base cover is elastically deformed. 
   
   
       10 . The method of  claim 9 , wherein the support load is a load corresponding to a deforming amount for the base cover to touch the shaft. 
   
   
       11 . The method of  claim 8 , further comprising coupling a cap to the sleeve such that the plate is covered by the cap, between the coupling of the plate and the pressing and coupling of the hub. 
   
   
       12 . The method of  claim 8 , further comprising injecting a fluid bearing in a gap between the sleeve and the shaft and in a gap between the shaft and the base cover.