Bearing positioning structure for motor

Abstract

A bearing positioning structure for a motor includes an axial tube and a positioning member. The positioning member includes a pressing portion and a coupling portion. The coupling portion of the positioning member is engaged with a coupling section of the axial tube for securely mounting the positioning member to the axial tube, with the pressing portion of the positioning member pressing against a bearing to position the bearing in the axial tube. In another example, the coupling portion of the positioning member engages with a coupling section on a stator.

1 . A bearing positioning structure for a motor, comprising:
 an axial tube for receiving at least one bearing, the axial tube including a coupling section; and   a positioning member including a pressing portion and a coupling portion;   wherein the coupling portion of the positioning member is engaged with the coupling section of the axial tube for securely mounting the positioning member to the axial tube, with the pressing portion of the positioning member pressing against the bearing to position the bearing in the axial tube.   
   
   
       2 . The bearing positioning structure for a motor as claimed in  claim 1 , wherein the coupling portion is formed on a bottom of the positioning member. 
   
   
       3 . The bearing positioning structure for a motor as claimed in  claim 1 , wherein the positioning member includes a top portion and wherein the pressing portion extends axially from an underside of the top portion. 
   
   
       4 . The bearing positioning structure for a motor as claimed in  claim 1 , wherein the coupling portion of the positioning member is a hook or an engaging groove. 
   
   
       5 . The bearing positioning structure for a motor as claimed in  claim 1  further comprising a restraining member mounted in the axial tube for limiting axial movement of a shaft of a rotor. 
   
   
       6 . The bearing positioning structure for a motor as claimed in  claim 1 , wherein the coupling section of the axial tube is a flange. 
   
   
       7 . The bearing positioning structure for a motor as claimed in  claim 6 , wherein the flange of the axial tube includes an inclined guiding face for guiding the coupling portion of the positioning member to engage with the flange of the axial tube. 
   
   
       8 . The bearing positioning structure for a motor as claimed in  claim 1  further comprising a protrusion extending from a top portion of the positioning member, with the protrusion having an end edge close to an inner face of a rotor. 
   
   
       9 . A bearing positioning structure for a motor, comprising:
 an axial tube for receiving a bearing;   a stator including a first coupling section; and   a positioning member including a pressing portion and a coupling portion;   wherein the first coupling section of the stator is engaged with the coupling portion of the positioning member for securely mounting the positioning member to an end of the axial tube, with the pressing portion of the positioning member pressing against the bearing to position the bearing in the axial tube.   
   
   
       10 . The bearing positioning structure for a motor as claimed in  claim 9 , wherein the coupling portion is formed on a top portion of the positioning member. 
   
   
       11 . The bearing positioning structure for a motor as claimed in  claim 9 , wherein the positioning member includes a top portion and wherein the pressing portion extends axially from an underside of the top portion. 
   
   
       12 . The bearing positioning structure for a motor as claimed in  claim 9 , wherein the coupling portion of the positioning member is a hook or an engaging groove. 
   
   
       13 . The bearing positioning structure for a motor as claimed in  claim 9  further comprising a restraining member mounted in the axial tube for limiting axial movement of a shaft of a rotor. 
   
   
       14 . The bearing positioning structure for a motor as claimed in  claim 9  further comprising a protrusion extending from a top portion of the positioning member, with the protrusion having an end edge close to an inner face of a rotor. 
   
   
       15 . The bearing positioning structure for a motor as claimed in  claim 9 , wherein the stator further includes a second coupling section and wherein the axial tube includes an engaging portion for engaging with the second coupling section of the stator, thereby securely mounting the stator to the axial tube. 
   
   
       16 . The bearing positioning structure for a motor as claimed in  claim 9 , wherein the first coupling section is a hook.