CN210397178U

CN210397178U - Direct current fan structure

Info

Publication number: CN210397178U
Application number: CN201920840566.3U
Authority: CN
Inventors: 张天浩; 范正鑫; 吴强
Original assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Current assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-04-24
Anticipated expiration: 2029-06-05

Abstract

The utility model provides a direct current fan structure has solved that current direct current fan circuit board installation space is not enough, and the rotor fan of rotor subassembly goes heavy structure unreasonable, the unreasonable problem of permanent magnet mounting structure. The utility model discloses a direct current fan structure includes casing subassembly, rotor subassembly, spring, first bearing, second bearing, first adjusting shim, spring housing, fluting countersunk screw, retaining ring gasket, second adjusting shim, nut, rear end cap, for the axle circlip, circuit board subassembly, screw gasket, hexagon socket head cap screw, for the hole circlip. The utility model can save circuit board space at the installation position of the fan circuit board assembly, thereby realizing more fan functions; the dynamic balance weight-removing surface of the fan rotor component is arranged inside the fan blades, so that the outer surfaces of the rotor fan blades are smooth and attractive; the gap between the adjacent permanent magnets of the fan is filled with the magnetic isolation blocks, so that the bonding manufacturability of the permanent magnets is improved, the non-uniform bonding angle of the permanent magnets is avoided, a subsequent tool fixture is not required to be designed, and the process steps are simplified.

Description

Direct current fan structure

Technical Field

The utility model belongs to the technical field of the fan, a direct current fan structure is related to.

Background

Most of the existing direct current fan circuit boards are fixed on the shaft sleeve, and the circuit boards are circular and have small device capacity; the existing direct current fan dynamic balance weight removal is generally to perform dotting weight removal on the outer surface of a disc body of a fan blade (refer to fig. 7), and the surface is not attractive; the existing direct current fan permanent magnet positioning mode is designed additionally in the process steps through a tool clamp.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a can save circuit board installation space, simplify, rotor subassembly structure is pleasing to the eye, simplify the direct current fan structure of technology.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a direct current fan structure comprises a shell assembly (1), a rotor assembly (2), a spring (3), a first bearing (41), a second bearing (42), a first adjusting gasket (5), a spring sleeve (6), a slotted countersunk head screw (7), a retainer gasket (8), a second adjusting gasket (9), a nut (10), a rear end cover (11), an elastic retainer ring for a shaft (12), a circuit board assembly (13), a screw gasket (14), an inner hexagonal cylindrical head screw (15) and an elastic retainer ring for a hole (16);

the shell assembly (1) is composed of a stator (17), a shell (18), a retainer ring (19) and a shaft sleeve (20); the shaft sleeve (20) is fixed on the shell (18) through embedding and die-casting, the stator (17) is adhered and installed on the shaft sleeve (20) through a small gap and encapsulated, and a retainer ring (19) is installed on the periphery of the shaft sleeve (20) on the right side of the stator (17);

rotor subassembly (2) is by rotor flabellum (21), rotor cover (22), axle (23), magnetic isolation piece (24), permanent magnet (25) constitute, 4 permanent magnets (25) bond on rotor cover (22), the clearance between adjacent permanent magnet (25) is filled with magnetic isolation piece (24), rotor flabellum (21) are fixed with rotor cover (22) mould pressing, the one end axial mould pressing of axle (23) is fixed at the inside central point of rotor cover (22), the other end axial of axle (23) is arranged in axle sleeve (20) inside cavity, and the periphery of axle (23) is from right side to left side and is installed first adjusting shim (5) in proper order, first bearing (41), spring housing (6), place spring (3) in spring housing (6), retaining ring gasket (8), circlip (16) for the hole, second bearing (42), install axle in second bearing (42) outer terminal surface and use circlip (12), The inner periphery of the shaft sleeve (20) is provided with an annular groove, and a circlip (16) for a hole is arranged in the annular groove;

the circuit board assembly (13) is fixed on the shaft sleeve (20) through 3 inner hexagonal socket head cap screws (15), and a screw gasket (14) is arranged between each inner hexagonal socket head cap screw (15) and the shaft sleeve (20).

The rear end cover (11) is fixed with the shell (1) through 3 slotted countersunk head screws (7).

Further, the 4 permanent magnets (25) include 2N poles and 2S poles, which are alternately arranged in the circumferential direction.

Furthermore, the 3 hexagon socket head cap screws (15) are uniformly distributed in the circumferential direction, and the 3 slotted countersunk head screws (7) are uniformly distributed in the circumferential direction.

Furthermore, a groove (26) with an L-shaped section is formed inwards in the circumferential direction of the disc body of the rotor fan blade (21) and is used as a dynamic balance weight-removing surface of the rotor assembly (2).

Compared with the prior art, the utility model discloses following beneficial effect has: the fan circuit board component of the utility model is fixed on the shell component through three inner hexagonal socket head cap screws, and the installation position can save the circuit board space, thereby realizing more fan functions; the dynamic balance weight-removing surface of the fan rotor component is arranged inside the rotor fan blade, so that the outer surface of the rotor fan blade is smooth and attractive; the gap between the adjacent permanent magnets of the fan is filled with the magnetic isolation blocks, so that the bonding manufacturability of the permanent magnets is improved, the non-uniform bonding angle of the permanent magnets is avoided, a subsequent tool fixture is not required to be designed, and the process steps are simplified.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the housing assembly;

FIG. 3 is a schematic view of the structure of the rotor assembly;

FIG. 4 is an installation schematic of a circuit board assembly;

fig. 5 is a sectional view of the internal structure of the rotor assembly;

FIG. 6 is a right side view of FIG. 3;

FIG. 7 is a schematic illustration of a prior art de-weighting structure for rotor blades;

in the figure: 1-a housing assembly; 2-a rotor assembly; 3-a spring; 41-a first bearing; 42-a second bearing; 5-a first spacer; 6-a spring sleeve; 7-slotted countersunk flat head screw; 8-a retainer gasket; 9-a second spacer; 10-a nut; 11-rear end cap; 12-circlip for shaft; 13-a circuit board assembly; 14-screw washers; 15-hexagon socket cap screw; 16-circlip for hole; 17-a stator; 18-a housing; 19-a retainer ring; 20-shaft sleeve; 21-rotor blades; 22-a rotor sleeve; 23-axis; 24-a magnetic separator; 25-a permanent magnet; 26-groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a direct current fan structure is characterized by comprising a shell assembly 1, a rotor assembly 2, a spring 3, a first bearing 41, a second bearing 42, a first adjusting gasket 5, a spring sleeve 6, a slotted countersunk head screw 7, a retainer gasket 8, a second adjusting gasket 9, a nut 10, a rear end cover 11, a shaft elastic retainer ring 12, a circuit board assembly 13, a screw gasket 14, an inner hexagonal cylinder head screw 15 and a hole elastic retainer ring 16;

the shell assembly 1 consists of a stator 17, a shell 18, a retainer ring 19 and a shaft sleeve 20; the shaft sleeve 20 is fixed on the shell 18 through embedding and die casting, the stator 17 is adhered and installed on the shaft sleeve 20 through a small gap and encapsulated, and a retainer ring 19 is installed on the periphery of the shaft sleeve 20 on the right side of the stator 17;

the rotor assembly 2 is composed of rotor blades 21, a rotor sleeve 22, a shaft 23, a magnetic isolation block 24 and permanent magnets 25, wherein 4 permanent magnets 25 are bonded on the rotor sleeve 22, gaps between adjacent permanent magnets 25 are filled with the magnetic isolation block 24, the rotor blades 21 and the rotor sleeve 22 are fixed in a mold pressing mode, one end of the shaft 23 is fixed in the center position inside the rotor sleeve 22 in a mold pressing mode in an axial direction, the other end of the shaft 23 is axially arranged in a cavity inside the shaft sleeve 20, a first adjusting gasket 5, a first bearing 41, a spring sleeve 6, a spring 3 arranged in the spring sleeve 6, a retainer gasket 8, a hole circlip 16 and a second bearing 42 are sequentially arranged on the periphery of the shaft 23 from right to left, the outer end face of the second bearing 42 is provided with the shaft circlip 12, a second adjusting gasket 9 and a nut 10, an annular groove is formed in the inner periphery of the shaft sleeve 20, and the;

referring to fig. 4, the circuit board assembly 13 is fixed to the bushing 20 by 3 socket cap screws 15, and a screw washer 14 is installed between each socket cap screw 15 and the bushing 20.

The rear end cap 1 is fixed with the housing 1 by 3 slotted countersunk head screws 7.

Referring to fig. 6, the 4 permanent magnets 25 include 2N poles and 2S poles, which are alternately arranged in a circumferential direction.

Referring to fig. 4, the 3 socket cap screws 15 are uniformly distributed in the circumferential direction, and the 3 slotted countersunk head screws 7 are uniformly distributed in the circumferential direction.

Referring to fig. 5, a groove 26 having an L-shaped cross section is formed inward in the circumferential direction of the disk body of the rotor blade 21, and an outer end surface of a boss formed inside the groove 26 is flush with an outer end surface of the rotor sleeve 22, and serves as a dynamic balance weight removing surface of the rotor assembly 2, so that the weight of the rotor blade can be reduced, and compared with the prior art in which the weight is removed by dotting on the periphery of the disk body of the rotor blade, the dynamic balance weight removing device is more attractive and can ensure the dynamic balance of the rotor assembly.

The fan circuit board component of the utility model is fixed on the shell component through 3 inner hexagonal socket head cap screws, and the installation position can save the circuit board space, thereby realizing more fan functions; the dynamic balance weight-removing surface of the fan rotor component is arranged inside the rotor fan blade, so that the outer surface of the rotor fan blade is smooth and attractive; the gap between the adjacent permanent magnets of the fan is filled with the magnetic isolation blocks, so that the bonding manufacturability of the permanent magnets is improved, the non-uniform bonding angle of the permanent magnets is avoided, a subsequent tool fixture is not required to be designed, and the process steps are simplified.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A direct current fan structure is characterized by comprising a shell assembly (1), a rotor assembly (2), a spring (3), a first bearing (41), a second bearing (42), a first adjusting gasket (5), a spring sleeve (6), a slotted countersunk head screw (7), a retainer gasket (8), a second adjusting gasket (9), a nut (10), a rear end cover (11), an elastic retainer ring for a shaft (12), a circuit board assembly (13), a screw gasket (14), an inner hexagonal cylindrical head screw (15) and an elastic retainer ring for a hole (16);

the circuit board assembly (13) is fixed on the shaft sleeve (20) through 3 inner hexagonal socket head cap screws (15), and a screw gasket (14) is arranged between each inner hexagonal socket head cap screw (15) and the shaft sleeve (20);

the rear end cover (11) is fixed with the shell (18) through 3 slotted countersunk head screws (7).

2. A direct current fan structure according to claim 1, characterized in that said 4 permanent magnets (25) comprise 2N poles and 2S poles, the N poles and S poles being arranged alternately in the circumferential direction.

3. A direct current fan arrangement according to claim 1, characterised in that said 3 socket head cap screws (15) are evenly distributed in the circumferential direction and said 3 slotted countersunk head screws (7) are evenly distributed in the circumferential direction.

4. The structure of a direct current fan as claimed in claim 1, wherein a groove (26) with an L-shaped cross section is formed inward in the circumferential direction of the disk body of the rotor blade (21) to serve as a dynamic balance deadweight surface of the rotor assembly (2).