CN218733504U

CN218733504U - Fan with improved stator structure

Info

Publication number: CN218733504U
Application number: CN202222883209.XU
Authority: CN
Inventors: 王红标; 敖林; 钟国华
Original assignee: Hanyu Group JSCL
Current assignee: Hanyu Group JSCL
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-24
Anticipated expiration: 2032-10-31

Abstract

The utility model provides an improve stator structure's fan, includes support, impeller, circuit board, is fixed in pivot and the permanent magnet on the impeller, its characterized in that: still include the end cover and fix the plastic envelope stator who sets up on the support, this plastic envelope stator includes stator module and plastic envelope shell, and stator module includes iron core, coil former and enameled wire, and the plastic envelope shell is moulded plastics on stator module, and it combines with the coil former to wrap up the enameled wire, and the axial one end of plastic envelope is located to the end cover lid and encloses into the installation cavity rather than, and the circuit board holding is in the installation cavity. The utility model discloses an improve stator structure's fan, mould plastics and mould plastics the package of moulding on stator module and combine enameled wire parcel with the coil former, the circuit board holding realizes the waterproof protection to enameled wire and circuit board in the installation cavity that the package of moulding and end cover enclose, reduces the risk that the fan leads to the damage by external environment's influence, promotes the working life of fan.

Description

Fan with improved stator structure

Technical Field

The utility model relates to a fan of unanimous improvement stator structure, its IPC classification number is H02K3/46.

Background

A conventional fan with a circuit board, as shown in the prior patent No. CN212959159U, with a patent name of fan and electromechanical device, includes a motor and a circuit board, wherein a stator assembly of the motor includes an enameled wire, and an outgoing wire of the enameled wire is electrically connected to the circuit board. In the fan with the existing structure, the enameled wires and the circuit board are usually exposed to a use environment, and the enameled wires and the circuit board are damaged due to the influence (such as water splashing) of the external environment, so that the fan does not work. How to protect the enameled wire and the circuit board of the fan is not a better solution at present.

For terms and common general knowledge, refer to mechanical engineering handbook (handbook of mechanical engineering), motor engineering handbook (handbook of engineering), published in 1983 or 1997, and practical sheet metal technology handbook (handbook of technology), published in 2001, of mechanical industry publishers.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a following technical scheme:

the utility model provides an improve stator structure's fan, includes support, impeller, circuit board, is fixed in pivot and the permanent magnet on the impeller, its characterized in that: still include the end cover and fix the plastic envelope stator who sets up on the support, this plastic envelope stator includes stator module and plastic envelope shell, and stator module includes iron core, coil former and enameled wire, and the plastic envelope shell is moulded plastics on stator module, and it combines with the coil former to wrap up the enameled wire, and the axial one end of plastic envelope is located to the end cover lid and encloses into the installation cavity rather than, and the circuit board holding is in the installation cavity.

The utility model discloses an improve stator structure's fan, mould plastics the package of moulding plastics on stator module and combine the enameled wire parcel with the coil former, the circuit board holding realizes the water proof to enameled wire and circuit board in the installation cavity that the package of moulding plastics and end cover enclose, reduces the risk that the fan leads to damaging by external environment's influence, promotes the working life of fan.

Furthermore, the stator assembly further comprises a connecting terminal which is arranged on the coil rack and electrically connected with the enameled wire, and a connecting column of the connecting terminal, which is externally connected, penetrates through the plastic package shell and extends into the mounting cavity to be electrically connected with the circuit board.

Further, this improve stator structure's fan still includes the bearing, the impeller includes the wheel hub of tube-shape, the rim plate of being connected with wheel hub and sets up the blade on the rim plate axial face, the permanent magnet is fixed to be set up on wheel hub, the support includes support body and the cavity support erection column that stretches out from support body axial end face, the plastic envelope stator inserts and installs in the radial outside of support erection column, in the assembly state, the pivot is rotationally installed in the cavity intracavity of support erection column through the bearing, and the permanent magnet sets up with the radial surface of iron core relatively.

Furthermore, the iron core comprises an annular yoke part, a tooth part extending outwards from the radial surface of the yoke part and tooth crown parts extending towards two sides from the end part of the tooth part, and the gap between two adjacent tooth crown parts is filled by the axially extending blocking part of the plastic package shell.

Further, the radially inner surface of the yoke is provided with a downwardly concave yoke groove.

Further, the radially inner surface, the radially outer surface, and a portion of the axial face of the core proximate the axis are exposed to the plastic capsule.

Furthermore, the stator assembly further comprises a terminal sheath sleeved on the connecting column, and the axial end face of the terminal sheath is exposed out of the plastic package.

Furthermore, the plastic package shell is provided with a concave groove which is concave in the axial direction at the end part of the shell which is positioned at one end of the iron core in the axial direction.

Furthermore, the plastic package shell extends out of the axial end face of the end of the shell to form a mounting column, and the circuit board is provided with a through hole or a notch matched with the mounting column.

Drawings

Fig. 1 is an exploded view of the fan of the present invention;

fig. 2 is a sectional view of the fan of the present invention;

FIG. 3 is an enlarged schematic view of A in FIG. 2;

fig. 4 is a schematic perspective view of the plastic-sealed stator of the present invention;

fig. 5 is a schematic perspective view of a stator assembly of the present invention;

fig. 6 is a schematic perspective view of the iron core of the present invention;

fig. 7 is a schematic view of the three-dimensional structure of the plastic-sealed stator of the present invention after the end cap is installed;

fig. 8 is a cross sectional view of the plastic sealed stator after mounting the end cap and the circuit board;

wherein: 1-mounting cavity, 10-plastic-packaged stator, 20-bracket, 21-bracket body, 22-bracket mounting column, 30-impeller, 31-hub, 32-wheel disc, 33-blade, 40-circuit board, 50-rotating shaft, 60-permanent magnet, 70 end cover, 80-bearing, 90-retainer ring, 100-stator assembly, 110-iron core, 111-yoke part, 112-tooth part, 113-tooth crown part, 114-yoke part groove, 120-coil rack, 130-enameled wire, 140-connecting terminal, 141-connecting column, 150-terminal sheath, 200-plastic-packaged shell, 210-shell end part, 211-mounting column, 212-groove, 220-baffle part and 300-power line

Detailed Description

The utility model discloses an improve stator structure's fan, see fig. 1 to 5, this fan includes support 20, sets up plastic envelope stator 10, impeller 30, circuit board 40, end cover 70 on support 20, fixed pivot 50 and the permanent magnet 60 that sets up on impeller 30. The stator assembly 100 includes an iron core 110, a bobbin 120 disposed on the iron core 110, and an enamel wire 130 wound on the bobbin 120. The plastic package stator 10 includes a stator assembly 100 and a plastic package casing 200, wherein the plastic package casing 200 is formed by placing the stator assembly 100 as an insert into a mold and performing injection molding, and is fixed on the stator assembly 100.

Referring to fig. 4 and 8, after the plastic package 200 is fixed to the stator assembly 100 by injection molding, the plastic package 200 is combined with the coil bobbin 120 to wrap the enamel wire 130. During assembly, the end cap 70 faces the axial surface of the plastic package 200 and is clamped to the plastic package 200 by the elastic convex buckle on the end cap 70. Of course, as other embodiments, the end cap 70 and the plastic enclosure 200 may be connected by screws or other fastening structures commonly used in mechanical engineering. The end cap 70 and the plastic package shell 200 are mounted in a closed manner and then enclose a mounting cavity 1, and the circuit board 40 is placed in the mounting cavity 1 and fixed on the plastic package shell 200 through screws.

The utility model discloses an improve stator structure's fan, mould plastics and mould plastics the package of moulding on stator module and combine enameled wire parcel with the coil former, the circuit board holding realizes the waterproof protection to enameled wire and circuit board in the installation cavity that the package of moulding and end cover enclose, reduces the risk that the fan leads to the damage by external environment's influence, promotes the working life of fan.

Referring to fig. 4 and 5, the stator assembly 100 of the fan with the improved stator structure of the present invention further includes a connection terminal 140 disposed on the bobbin 120, wherein the connection terminal 140 is electrically connected to the enamel wire 130. Referring to fig. 8, in order to facilitate the electrical connection between the terminals 140 and the circuit board 40, the terminals 140 include connection posts 141 for external connection, and the connection posts 141 extend through the plastic package 200 into the mounting cavity 1 to be electrically connected to the circuit board 40. Of course, as other embodiments, the enameled wire can also be directly connected with the circuit board through the plastic package.

Referring to fig. 4 and 8, the plastic capsule 200 includes a housing end portion 210 at one axial end of the core 110, the housing end portion 210 having an axially recessed groove 212. Through the design, the end part of the shell can be prevented from generating a cavity, and the strength of the plastic package is improved. In order to facilitate positioning and mounting of the circuit board, the plastic package 200 further includes a mounting post 211 protruding from an axial end surface of the housing end 210, the circuit board 40 is provided with a through hole 41 or a notch adapted to the mounting post 211, and the circuit board 40 is mounted by inserting the mounting post 211 through the through hole 41 or the notch.

Referring to fig. 4 and 8, after the stator assembly 100 of the fan with the improved stator structure of the present invention is placed in a mold and injection molded to form the plastic casing 200, the radial inner surface, the radial outer surface of the core 110 and a portion of the axial surface of the core near the axis are exposed out of the plastic casing 200. This design reduces stator module mould intracavity fused plastics and the area of contact of iron core when moulding plastics the capsule, reduces the probability that the starved adhesive appears when moulding plastics, promotes the qualification rate of the plastic envelope stator production of this fan. Of course, as other embodiments, the plastic package housing 200 may completely wrap the core 110, or wrap the radially outer surface of the core 110, or wrap the radially inner surface of the core 110.

See fig. 1 to fig. 3, the utility model discloses an improve impeller 30 of stator structure's fan includes the wheel hub 31 of tube-shape, the rim plate 32 of being connected with wheel hub and sets up the blade 33 on the rim plate axial surface, and permanent magnet 60 is fixed to be set up on wheel hub 31, establishes the wheel hub mounting hole on wheel hub 31, and the annular knurl is established to the axial one end of pivot 50, and its interference is inserted and is installed in the wheel hub mounting hole fixed with impeller 30. Of course, as another embodiment, the rotating shaft and/or the permanent magnet may be used as an insert in the injection molding of the impeller and fixed to the impeller after the injection molding. The bracket 20 includes a bracket body 21 and a hollow bracket mounting post 22 projecting from an axial end face of the bracket body. Further, the fan with the improved stator structure further comprises a retainer ring 90 clamped on the rotating shaft 50 and a bearing 80 arranged in a hollow cavity of the support mounting column 22, during installation, the plastic package stator 10 is inserted and installed on the radial outer side of the support mounting column 22, the radial inner surface of the iron core 110 is in interference fit with the radial outer surface of the mounting column 22, and further, glue is coated on the radial surface of the iron core 110 to increase the connection strength between the plastic package stator 10 and the support 20. In the assembled state, the rotating shaft 50 passes through the inner ring of the bearing 80 and is rotatably mounted in the hollow cavity of the bracket mounting post 22, and the retainer ring 90 is located between the end surface of the bearing 80 and the end surface of the bracket mounting post 22 to limit the axial movement of the rotating shaft 50. The permanent magnet 60 is disposed opposite to the radially outer surface of the core 110. The structure is convenient for processing and assembling fan parts, and improves the production efficiency of the fan.

Referring to fig. 4 and 5, the stator of the fan of the present invention includes a stator assembly 100 having a core 110 including an annular yoke 111, teeth 112 extending outward from a radial surface of the yoke 111, and tooth crowns 113 extending from ends of the teeth 112 to both sides. After the stator assembly is injection molded, the plastic casing 200 axially extends out of the blocking portion 220 to fill the gap between two adjacent tooth crowns 113. This design has increased the intensity of the iron core of plastic envelope stator, reduces the iron core and appears deformation influence magnetic property because of the bumping, promotes the stability of fan work. Further, in order to prevent the parts or the mold from being damaged due to the circumferential displacement of the connecting column 141 colliding with the mold during the injection molding of the capsule, the radial inner surface of the yoke portion 111 of the core 110 is provided with a yoke portion groove 114 recessed downward for the circumferential fixing of the mold of the injection molding capsule 200.

See fig. 4 and fig. 5, when moulding plastics for reducing stator module and putting into the mould, the mould spills over along the spliced pole with spliced pole 141 bumps the damage that leads to stator module to take place and the molten plastics when reducing to mould plastics, further promotes the production qualification rate of the plastic envelope stator of this fan, the utility model discloses a stator module 100 still includes terminal sheath 150. The terminal sheath 150 is sleeved on the connection post 141, and after the stator assembly 100 is injection molded to form the plastic package 200, the axial end surface of the terminal sheath 150 is exposed out of the plastic package 200.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention are not departed from the spirit and scope of the present invention, provided they fall within the scope of the claims and the equivalent technical scope of the present invention, then the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an improve fan of stator structure, includes support (20), impeller (30), circuit board (40), is fixed in pivot (50) and permanent magnet (60) on the impeller, its characterized in that: the plastic package stator (10) comprises a stator assembly (100) and a plastic package shell (200), the stator assembly (100) comprises an iron core (110), a coil rack (120) and an enameled wire (130), the plastic package shell (200) is molded on the stator assembly (100) in an injection mode, the enameled wire (130) is wrapped by the aid of the mold rack (120), the end cover (70) is arranged at one axial end of the plastic package shell (200) in a covering mode and encloses a mounting cavity (1) with the end cover, and the circuit board (40) is contained in the mounting cavity (1).

2. The fan for improving the stator structure as claimed in claim 1, wherein: stator module (100) still including set up on coil former (120) and with binding post (140) that enameled wire (130) electricity is connected, the supply external spliced pole (141) of binding post (140) cross plastic envelope (200) and extend to in installation cavity (1) with circuit board (40) electricity be connected.

3. The fan for improving the stator structure according to claim 1 or 2, wherein: the impeller (30) comprises a cylindrical hub (31), a wheel disc (32) connected with the hub and blades (33) arranged on the axial face of the wheel disc, the permanent magnet (60) is fixedly arranged on the hub (31), the support (20) comprises a support body (21) and hollow support mounting columns (22) extending out of the axial end faces of the support body, the plastic package stator (10) is inserted and mounted on the radial outer sides of the support mounting columns (22), in an assembly state, the rotating shaft (50) is rotatably accommodated in the hollow cavities of the support mounting columns (22) through the bearing (80), and the permanent magnet (60) and the radial outer surface of the iron core (110) are arranged oppositely.

4. The fan for improving the stator structure as claimed in claim 3, wherein: the iron core (110) comprises an annular yoke portion (111), a tooth portion (112) extending outwards from the radial surface of the yoke portion and tooth crown portions (113) extending from the end portions of the tooth portion to two sides, and the baffle portion (220) extending in the axial direction of the plastic-sealed shell (200) fills the gap between every two adjacent tooth crown portions (113).

5. The fan for improving the stator structure as claimed in claim 4, wherein: the radial inner surface of the yoke part (111) is provided with a downward-concave yoke part groove (114).

6. The fan for improving the stator structure according to claim 1 or 2, wherein: the radial inner surface and the radial outer surface of the iron core (110) and the part of the axial surface of the iron core close to the axis are exposed out of the plastic casing (200).

7. The fan for improving the stator structure as claimed in claim 2, wherein: the stator assembly (100) further comprises a terminal sheath (150) sleeved on the connecting column (141), and the axial end face of the terminal sheath (150) is exposed out of the plastic casing (200).

8. The fan for improving the stator structure as claimed in claim 1, wherein: the plastic casing (200) is provided with an axially recessed groove (212) at the end (210) of the housing at one axial end of the core (110).

9. The fan for improving the stator structure as claimed in claim 8, wherein: the plastic casing (200) extends out of the axial end face of the end part (210) of the shell to form a mounting column (211), and the circuit board (40) is provided with a through hole (41) or a notch matched with the mounting column (211).