Fan motor

Patent metadata

Field	Value
Publication number	US-11901798-B2
Application number	US-201917288501-A
Country	US
Kind code	B2
Filing date	Oct 23, 2019
Priority date	Dec 24, 2018
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

The fan motor according to the present invention comprises a fan (10) comprising a fan body (11) having a circular plate shape, a plurality of fan blades (12) formed in an upper portion of the fan body (11), a central protruding part (13) protruding upwardly from a central portion of the fan body (11), a shaft fixing part (14) formed in an inner side of the central protruding part (13), a shaft (15) coupled and fixed to the shaft fixing part (14) to rotate when the fan body (11) rotates, and a magnet receiving part (16) formed in a central lower portion of the fan body (11); a ring plate magnet (20) coupled to the magnet receiving part (16); a motor bracket (30) having a PCB bracket coupling part (31) formed in a center; a PCB bracket (40) comprising a body (41) having a cup shape, a bearing insertion part (42) having a cylinder shape, protruding upwardly from a center of the body (41), a through-hole (44) formed inside the bearing insertion part (42), into which a bearing (45) is inserted, and the bearing (45) inserted and fixed to the through-hole (44); and a coil-PCB assembly (50) comprising a coil cover (51), a pair of D-type coils (52) installed in the coil cover (51), and a PCB (53) located in a lower portion of the coil cover (51) and installed in the body (41), wherein the ring plate magnet (20) installed in a lower portion of the fan body (11) is located in an upper portion of the pair of D-type coils (52) to face therewith.

First claim

The invention claimed is:

1. A fan motor comprising:
a fan 10 comprising a fan body 11 having a circular plate shape, a plurality of fan blades 12 formed in an upper portion of the fan body 11 , a central protruding part 13 protruding upwardly from a central portion of the fan body 11 , a shaft fixing part 14 formed in an inner side of the central protruding part 13 , a shaft 15 coupled and fixed to the shaft fixing part 14 to rotate when the fan body 11 rotates, and a magnet receiving part 16 formed in a central lower portion of the fan body 11 ;
a ring plate magnet 20 coupled to the magnet receiving part 16 ;
a motor bracket 30 having a PCB bracket coupling part 31 formed in a center;
a PCB bracket 40 comprising a body 41 having a cup shape, a bearing insertion part 42 having a cylinder shape, protruding upwardly from a center of the body 41 , a through-hole 44 formed inside the bearing insertion part 42 , into which a bearing 45 is inserted, and the bearing 45 inserted and fixed to the through-hole 44 ; and
a coil-PCB assembly 50 comprising a coil cover 51 , a pair of D-type coils 52 installed in the coil cover 51 , and a PCB 53 located in a lower portion of the coil cover 51 and installed in the body 41 ,
wherein the ring plate magnet 20 installed in a lower portion of the fan body 11 is located in an upper portion of the pair of D-type coils 52 to face therewith,
wherein the fan 10 is formed by an insert injection molding with the shaft 15 and the ring plate magnet 20 located in a mold, whereby the ring plate magnet 20 is directly coupled to the magnet receiving part 16 ,
wherein a plurality of fixing holes 20 A are formed in the ring plate magnet 20 ,
wherein a plurality of fixing projections 16 A formed in the magnet receiving part 16 is coupled to the plurality of fixing holes 20 A.

2. The fan motor of claim 1 , wherein an insertion hole 51 A and a hole 53 A are formed in a center of the coil cover 51 and PCB 53 , respectively, and when the coil cover 51 and PCB 53 are installed in the PCB bracket 40 , the bearing insertion part 42 is inserted into the insertion hole 51 A and hole 53 A such that the coil cover 51 and PCB 53 are located in a bottom surface inside the body 41 .

3. The fan motor of claim 1 , wherein the through-hole 44 is penetrated from an upper end of the bearing insertion part 42 to a central lower portion of the body 41 such that a lower end of the shaft 15 is exposed to a central lower portion of the PCB bracket 40 .

4. The fan motor of claim 1 , wherein at least one coupling groove 32 is formed around the PCB bracket coupling part 31 .

5. The fan motor of claim 1 , wherein the pair of D-type coils 52 is installed such that a curved portion thereof is located in an outer side.

Assignees

• New Motech Co Ltd

Inventors

• Jang Jeong Cheol
• Park Gyeong Su
• Cho Woo Sung

Classifications

• H02K7/14 Primary

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• F04D17/16

  for displacing without appreciable compression · CPC title

• F04D25/0693

  Details or arrangements of the wiring · CPC title

• F04D29/056

  Bearings · CPC title

• H02K1/2795

  the rotor consisting of two or more circumferentially positioned magnets · CPC title