TWI693345B - Fan and self-lubricating bearing - Google Patents

Abstract

A fan and a self-lubricating bearing thereof are provided in the present disclosure. The self-lubricating bearing has a ceramic cylinder and a pair of end caps. An end surface is formed on each end of the ceramic cylinder, and an external annular surface connected between the end surfaces is formed on an outer side of the ceramic cylinder. multiple grooves are defined on the ceramic cylinder and the respective grooves are extended from one end surface to the other end surface through the external annular surface. The respective end faces are covered by the respective end caps. Therefore, the lubricating oil contained in the self-lubricating bearing is prevented from being spilling out of the lubrication bearing.

Description

Fan and its self-lubricating bearing

The invention relates to a fan, especially a fan and its self-lubricating bearing, and the self-lubricating bearing can prevent the lubricant from being thrown out.

The invention relates to a fan bearing. A self-lubricating bearing made of ceramic can absorb lubricating oil through the pores of the ceramic material itself. When the fan rotates, the lubricating oil flows between the self-lubricating bearing and the rotating shaft to reduce resistance. However, the disadvantage of the existing self-lubricating bearing is that the rotating shaft will drive the lubricating oil to rotate when the fan rotates, and then a part of the lubricating oil will be thrown out of the bearing to contaminate other components adjacent to the fan.

In view of this, the present inventors have made great efforts to study the above-mentioned prior art and cooperate with the application of academic principles, and try their best to solve the above-mentioned problems, which becomes the improvement goal of the present inventors.

The invention provides a fan and a self-lubricating bearing, and the self-lubricating bearing can prevent the lubricant from being thrown out.

The invention provides a self-lubricating bearing, which comprises a ceramic cylinder and a pair of end caps. One end surface is formed on the two ends of the ceramic cylinder body respectively, and an outer annular surface connected between the pair of end surfaces is formed on the outer side of the ceramic cylinder body. The surface of the ceramic cylinder body is provided with a plurality of grooves, each groove The end surface extends to the other end surface through the outer ring surface. The end cover covers each end face separately.

In the self-lubricating bearing of the present invention, each groove communicates with the inside and outside of the ceramic cylinder. The grooves are arranged parallel to each other on the outer ring surface. Each groove extends parallel to the axial direction of the ceramic cylinder on the outer ring surface. At least one tenon is protruded from each end cover respectively, and at least one tenon is formed on each end surface of the ceramic cylinder corresponding to at least one tenon on each end cover, and each tenon is inserted into the corresponding one In the hole.

The invention also provides a fan, which includes a fan frame, the aforementioned self-lubricating bearing, a rotating shaft and an impeller. The self-lubricating bearing is set in the fan frame. One end of the rotating shaft is connected to the ceramic cylinder. The impeller is connected to the other end of the rotating shaft.

In the fan of the present invention, the fan frame forms a bearing sleeve, and the ceramic cylinder is inserted in the bearing sleeve. At least one end of the cover is provided with a shaft hole, and the rotating shaft penetrates the ceramic cylinder through the shaft hole. At least one tenon is protruded from each end cover respectively, and at least one tenon is formed on each end surface of the ceramic cylinder corresponding to at least one tenon on each end cover, and each tenon is inserted into the corresponding one In the hole. Each groove communicates with the inside and outside of the ceramic cylinder. The grooves are arranged parallel to each other on the outer ring surface. Each groove extends parallel to the axial direction of the ceramic cylinder on the outer ring surface.

In the fan and the self-lubricating bearing of the present invention, the two ends of the ceramic cylinder are respectively closed by end caps, which can block the flow of lubricating oil flowing along the axial direction of the self-lubricating bearing from overflowing the self-lubricating bearing. In addition, the grooves at the two ends of the ceramic cylinder are closed by end caps to form a pipeline for the return of lubricating oil. Therefore, it is possible to prevent the lubricating oil from being thrown out of the self-lubricating bearing when the impeller rotates.

100: fan frame

110: bearing sleeve

120: Gland

200: Self-lubricating bearing

201: top

202: bottom

210: ceramic cylinder

211/111a: end face

212: outer torus

213: Groove

214/214a: jack

220/220a: end cover

221/221a: shaft hole

224/224a: Tenon

300: rotating shaft

400: impeller

510: Stator coil assembly

520: rotor magnet

FIG. 1 is a three-dimensional exploded schematic diagram of a fan according to a preferred embodiment of the present invention.

2 is a perspective schematic view of a fan according to a preferred embodiment of the present invention.

3 is a cross-sectional view of a fan according to a preferred embodiment of the present invention.

FIG. 4 is a partially enlarged view of FIG. 3.

5 is a three-dimensional exploded view of a self-lubricating bearing according to a preferred embodiment of the present invention.

6 is a perspective schematic view of a self-lubricating bearing according to a preferred embodiment of the present invention.

7 and 8 are cross-sectional views of a self-lubricating bearing according to a preferred embodiment of the present invention.

1 to 3, a preferred embodiment of the present invention provides a fan, including a fan frame 100, a self-lubricating bearing 200, a rotating shaft 300, an impeller 400, a certain sub-coil assembly 510 and a rotor magnet 520 .

In this embodiment, the fan frame 100 is preferably made of plastic injection molding. The fan frame 100 is an annular frame, and a bearing sleeve 110 is formed in the center of the fan frame 100. The axial direction of the bearing sleeve 110 is arranged along the center axis of the ring shape of the fan frame 100. The bearing sleeve 110 is open at one end and closed at the other end.

The self-lubricating bearing 200 is disposed in the fan frame 100, and specifically, the ceramic cylinder 210 is passed through the bearing sleeve 110 of the fan frame 100. Preferably, the open end of the bearing sleeve 110 is configured to be inserted into the self-lubricating bearing 200, and the open end of the bearing sleeve 110 is provided with a gland 120 to fix the self-lubricating bearing 200 in the bearing sleeve 110.

5 to 8, in this embodiment, the self-lubricating bearing 200 preferably includes a ceramic barrel 210 and a pair of end caps 220/220a. The ceramic cylinder 210 has pores inside and therefore can absorb lubricating oil through the pores. The ceramic cylinder 210 is vertically arranged inside the bearing sleeve 110, and its two ends are a top end 201 and a bottom end 202, respectively. An end surface 211/111a is formed on the top end 201 and the bottom end 202 of the ceramic cylinder 210, respectively, and an outer annular surface 212 connected between the pair of end surfaces 211/111a is formed outside the ceramic cylinder 210. The surface of the ceramic cylinder 210 is provided with a plurality of grooves 213. Each groove 213 extends from one end surface 211 to the other end surface 111a through the outer ring surface 212. The pair of end caps 220/220a respectively cover the corresponding end faces 211/111a Each groove 213 on each end surface 211/111a is closed as a pipe, and the outer ring surface 212 is attached to the inner wall surface of the bearing sleeve 110 to close each groove 213 on the outer ring surface 212 as a pipe. At least a shaft hole 221 is defined in the end cap 220 of the top 201 of the ceramic barrel 210. In this embodiment, the end caps 220/220a at both ends of the ceramic cylinder 210 are preferably provided with shaft holes 221/221a. Therefore, the self-lubricating bearing 200 can be installed upside down. At least one tenon 224/224a is provided on each end cover 220/220a, and at least one tenon 224/224a on each end surface 211/111a of the ceramic cylinder 210 corresponds to at least one tenon 224/224a on each end cover 220/220a The holes 214/214a, and the tenons 224/224a are respectively inserted into the corresponding holes 214/214a, thereby fixing the end caps 220/220a to the top 201 and bottom ends of the ceramic cylinder 210, respectively 202.

In the present embodiment, each groove 213 communicates with the inside and outside of the ceramic cylinder 210, so that the lubricant can be circulated between the inside and outside of the ceramic cylinder 210. The grooves 213 are arranged parallel to each other on the outer annular surface 212. Each groove 213 extends parallel to the axial direction of the ceramic cylinder 210 on the outer annular surface 212. The arrangement of the groove 213 is not limited in the present invention, but the above-mentioned preferred arrangement can prevent the turning angle of the groove 213 between each end surface 211/111a and the outer ring surface 212 from being excessively large and increase the lubricating oil flow resistance.

One end of the rotating shaft 300 penetrates the ceramic cylinder 210, and the rotating shaft 300 penetrates the ceramic cylinder 210 through the shaft hole 221. The impeller 400 is connected to the other end of the rotating shaft 300.

The stator coil assembly 510 has a ring shape, which is sleeved outside the bearing sleeve 110 and it can preferably buckle the gland 120 to fix the gland 120. The stator coil assembly 510 includes a plurality of coils arranged in a ring row and the coils are arranged around the bearing sleeve 110. The rotor magnet 520 is disposed on the impeller 400. The rotor magnet 520 has a ring shape. The rotor magnet 520 surrounds the stator coil assembly 510 and is spaced apart from the stator coil assembly 510.

When the stator coil assembly 510 is turned on, the rotor magnet 520 can be induced to drive the impeller 400 to rotate about the rotating shaft 300. When the rotating shaft 300 rotates, the lubricating oil contained in the ceramic cylinder 210 penetrates between the rotating shaft 300 and the ceramic cylinder 210 to reduce the resistance between the rotating shaft 300 and the ceramic cylinder 210. When the rotating shaft 300 rotates, the lubricating oil between the rotating shaft 300 and the ceramic cylinder 210 is rotated and thrown toward the tip 201 of the ceramic cylinder 210. The lubricating oil flows back from the top 201 of the ceramic cylinder 210 through the grooves 213 to the bottom 202 of the ceramic cylinder 210 and then enters between the rotating shaft 300 and the ceramic cylinder 210.

In the fan and the self-lubricating bearing 200 of the present invention, the two ends of the ceramic cylinder 210 are closed by end caps 220/220a, respectively. 200. Moreover, the grooves 213 at the two ends of the ceramic cylinder 210 are closed by end caps 220/220a to form a pipeline for the lubricating oil to return. Therefore, it is possible to prevent the lubricant oil from being thrown out of the self-lubricating bearing 200 when the impeller 400 rotates.

The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Other equivalent changes using the patent spirit of the present invention should all fall within the patent scope of the present invention.

100: fan frame

110: bearing sleeve

120: Gland

200: Self-lubricating bearing

210: ceramic cylinder

220/220a: end cover

300: rotating shaft

400: impeller

510: Stator coil assembly

520: rotor magnet

Claims (10)

A self-lubricating bearing, comprising: a ceramic cylinder body, one end surface is formed on both ends of the ceramic cylinder body respectively, an outer annular surface connected between the pair of end surfaces is formed on the outer side of the ceramic cylinder body, the ceramic cylinder body The surface is provided with a plurality of grooves, each of the grooves extends from one of the end surfaces through the outer ring surface to the other end surface; and a pair of end covers respectively covering the end surfaces, wherein the end covers are respectively At least one tenon is provided on the protrusion, at least one tenon on each end surface of the ceramic cylinder corresponds to at least one tenon on the end cover respectively, and each tenon is inserted into the corresponding Jack. The self-lubricating bearing according to claim 1, wherein each of the grooves communicates with the inside and outside of the ceramic cylinder, respectively. The self-lubricating bearing according to claim 1, wherein the grooves are arranged parallel to each other on the outer ring surface. The self-lubricating bearing according to claim 1, wherein each of the grooves extends parallel to the axial direction of the ceramic cylinder on the outer ring surface. A fan, comprising: a fan frame; the self-lubricating bearing according to claim 1, provided in the fan frame; a rotating shaft with one end of the rotating shaft passing through the ceramic cylinder; and an impeller connected The other end of the rotating shaft. The fan according to claim 5, wherein the fan frame forms a bearing sleeve, and the ceramic barrel is penetrated in the bearing sleeve. The fan according to claim 5, wherein at least one of the end covers defines a shaft hole, and the rotating shaft penetrates the ceramic cylinder through the shaft hole. The fan according to claim 5, wherein each of the grooves communicates with the inside and the outside of the ceramic cylinder, respectively. The fan according to claim 5, wherein the grooves are arranged parallel to each other on the outer ring surface. The fan according to claim 5, wherein each of the grooves extends parallel to the axial direction of the ceramic cylinder on the outer ring surface.

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