Fan structure and a bearing module thereof

Abstract

A fan structure at least includes a bearing module and a rotor, the bearing module includes a hollow cylinder body, a bearing, a limiting member and a blocking member. The hollow cylinder body comprises a ring wall and an accommodating hole, wherein the bearing, the limiting member and the blocking member are disposed at the accommodating hole in sequence. The ring wall comprises an inner ring wall and a limiting slot recessed from the inner ring wall. The blocking member comprises a body portion and a blocking portion extendedly formed at the body portion, the body portion embedded into the limiting slot, and the blocking portion is in contact against the limiting member. A rotating shaft of the rotor penetrated through the limiting member and the bearing, and a plurality limiting plates of the limiting member inserted into a ring slot of the rotating shaft.

What is claimed is: 
     
         1 . A fan structure comprising:
 a base having a coupling hole;   a bearing module disposed at the coupling hole comprising:
 a hollow cylinder body at least composed of a ring wall and an accommodating hole surrounded by the ring wall, wherein the ring wall having an outer ring wall, an inner ring wall and a limiting slot recessed from the inner ring wall; 
 a bearing disposed at the accommodating hole and comprised a top surface, a bottom surface and an axial hole; 
 a blocking member disposed at the limiting slot and located on top of the bearing, an accommodating space formed between the blocking member and the bearing, the blocking member having a body portion and a blocking portion extendedly formed at the body portion, wherein the body portion embedded into the limiting slot, the blocking portion protruded to the inner ring wall of the ring wall and located at the accommodating hole; and 
 a limiting member disposed at the accommodating space and comprised a body, a plurality of limiting plates extendedly formed at inside of the body, a plurality of penetrating slots and a penetrating hole in communication with the penetrating slots, each of the penetrating slots located between adjacent limiting plates, the limiting member includes a front end portion, the blocking portion of the blocking member is provided for contacting against the limiting member; and 
   a rotor includes a rotating shaft having a ring slot, the rotating shaft penetrated through the penetration hole of the limiting member and the axial hole of the bearing, and the front end portion of each of the limiting plates inserted into the ring slot.   
     
     
         2 . The fan structure in accordance with  claim 1 , wherein the blocking portion includes a first leaning portion provided for contacting against the limiting plate of the limiting member. 
     
     
         3 . The fan structure in accordance with  claim 2 , wherein the blocking portion further includes a second leaning portion provided for contacting against the body of the limiting member, a blocking area is composed of the first leaning portion and the second leaning portion. 
     
     
         4 . The fan structure in accordance with  claim 3 , wherein the blocking portion further includes a third leaning portion provided for contacting against the limiting plate and the body of the limiting member, a blocking area is composed of the first leaning portion, the second leaning portion and the third leaning portion. 
     
     
         5 . The fan structure in accordance with  claim 2 , wherein the blocking portion further includes a third leaning portion provided for contacting against the limiting plate of the limiting member, a blocking area is composed of the first leaning portion and the third leaning portion. 
     
     
         6 . The fan structure in accordance with  claim 1  further includes a gasket disposed between the limiting member and the bearing, and the gasket is provided for the limiting member to dispose thereon. 
     
     
         7 . The fan structure in accordance with  claim 6 , wherein the limiting member is clipped by the blocking member and the gasket. 
     
     
         8 . The fan structure in accordance with  claim 1 , wherein the limiting slot comprises an inner wall, the blocking member comprises an outer wall contacted against the inner wall. 
     
     
         9 . The fan structure in accordance with  claim 1 , wherein the accommodating hole comprises a hole diameter, the limiting member comprises an outer diameter smaller than the hole diameter. 
     
     
         10 . The fan structure in accordance with  claim 1 , wherein the blocking member comprises a maximum width, the limiting member comprises an outer diameter smaller than the maximum width. 
     
     
         11 . A bearing module of a fan structure comprising:
 a hollow cylinder body at least composed of a ring wall and an accommodating hole surrounded by the ring wall, wherein the ring wall having an outer ring wall, an inner ring wall and a limiting slot recessed from the inner ring wall;   a bearing disposed at the accommodating hole and comprised a top surface, a bottom surface and an axial hole;   a blocking member disposed at the limiting slot and located on top of the bearing, an accommodating space formed between the blocking member and the bearing, the blocking member having a body portion and a blocking portion extendedly formed at the body portion, wherein the body portion embedded into the limiting slot, the blocking portion protruded to the inner ring wall of the ring wall and located at the accommodated hole; and   a limiting member disposed at the accommodating space and comprised a body, a plurality of limiting plates extendedly formed at inside of the body, a plurality of penetrating slots and a penetrating hole in communication with the penetrating slots, each of the penetrating slots located between adjacent limiting plates, the limiting plate includes a front end portion, and the blocking portion of the blocking member is provided for contacting against the limiting member.   
     
     
         12 . The bearing module of a fan structure in accordance with  claim 11 , wherein the blocking portion includes a first leaning portion provided for contacting against the limiting plate of the limiting member. 
     
     
         13 . The bearing module of a fan structure in accordance with  claim 12 , wherein the blocking portion further includes a second leaning portion provided for contacting against the body of the limiting member, a blocking area is composed of the first leaning portion and the second leaning portion. 
     
     
         14 . The bearing module of a fan structure in accordance with  claim 13 , wherein the blocking portion further includes a third leaning portion provided for contacting against the limiting plate and the body, a blocking area is composed of the first leaning portion, the second leaning portion and the third leaning portion. 
     
     
         15 . The bearing module of a fan structure in accordance with  claim 12 , the blocking portion further includes a third leaning portion provided for contacting against the limiting plate of the limiting member, a blocking area is composed of the first leaning portion and the third leaning portion. 
     
     
         16 . The bearing module of a fan structure in accordance with  claim 11  further includes a gasket disposed between the limiting member and the bearing, and the gasket is provided for the limiting member to dispose thereon. 
     
     
         17 . The bearing module of a fan structure in accordance with  claim 16 , wherein the limiting member is clipped by the blocking member and the gasket. 
     
     
         18 . The bearing module of a fan structure in accordance with  claim 11 , wherein the limiting slot comprises an inner wall, the blocking member comprises an outer wall contacted against the inner wall. 
     
     
         19 . The bearing module of a fan structure in accordance with  claim 11 , wherein the accommodating hole comprises a hole diameter, the limiting member comprises an outer diameter smaller than the hole diameter. 
     
     
         20 . The bearing module of a fan structure in accordance with  claim 11 , wherein the blocking member comprises a maximum width, the limiting member comprises an outer diameter smaller than the maximum width.