CN217522641U - Stator assembly of brushless electronic water pump - Google Patents
Stator assembly of brushless electronic water pump Download PDFInfo
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- CN217522641U CN217522641U CN202221087721.7U CN202221087721U CN217522641U CN 217522641 U CN217522641 U CN 217522641U CN 202221087721 U CN202221087721 U CN 202221087721U CN 217522641 U CN217522641 U CN 217522641U
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- stator
- heat dissipation
- dissipation metal
- metal plate
- inner shell
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Abstract
The utility model discloses a brushless electronic pump's stator assembly, including shell and stator module, stator module includes stator core, stator winding and the interior casing of stator, and at least one mounting groove has been seted up to the outside of the interior casing of stator, and stator core's outer wall exposes from the mounting groove, is provided with the ground connection shell fragment in the mounting groove, and the ground connection shell fragment extrudees between stator core outer wall and shell, and the bottom of the interior casing of stator is fixed with the heat dissipation metal sheet, the lower extreme and the heat dissipation metal sheet contact of ground connection shell fragment are provided with ground connection screw on the heat dissipation metal sheet, and stator winding's pencil is connected with the pencil pin, and the pencil pin imbeds just the lower extreme exposes in the stator interior casing. This stator assembly has all embedded stator core, stator winding in the stator inner casing, has reduced the assembly degree of difficulty, simultaneously, has still set up ground connection shell fragment, derives some useless energy on the stator core to the magnetic energy radiation has been reduced.
Description
Technical Field
The utility model relates to a stator assembly especially relates to a stator assembly on the brushless electronic water pump that is used for the heat dissipation to use on the vehicle.
Background
The existing brushless electronic water pump drives a rotor impeller assembly to rotate by utilizing the principle of electromagnetic conversion, thereby realizing the output of cooling liquid. The applicant previously applied for a brushless electronic water pump with the patent number of CN201720017208.3, the structure of the electronic water pump mainly comprises a detachable and fixed outer shell, an isolation sleeve and an upper cover, an installation cavity is formed between the isolation sleeve and the outer shell, a fluid cavity is formed between the isolation sleeve and the upper cover, the fluid cavity and the installation cavity are mutually independent, a stator assembly and a PCB (printed circuit board) are fixed in the installation cavity, a rotor assembly matched with the stator assembly is rotatably installed in the fluid cavity, a water inlet and a water outlet are formed in the upper cover, the rotor assembly comprises an impeller and a connecting cylinder arranged at the bottom of the impeller, a wear-resistant lubricating insert is concentrically embedded and fixed in an inner hole of the connecting cylinder, a central hole concentrically arranged with the inner hole of the connecting cylinder is formed in the wear-resistant lubricating insert, and a magnetic yoke cylinder is concentrically sleeved and fixed outside the connecting cylinder, the magnetic ring barrel is fixed on the outer portion of the magnetic yoke barrel in a concentric sleeved mode, the isolation sleeve is provided with a positioning center shaft, the positioning center shaft is inserted into the center hole, and the outer shell is provided with a heat dissipation device connected with the PCB in a heat conduction mode. The electronic water pump has the following defects: 1. because the PCB is in heat conduction connection with the heat dissipation device at the bottom, the heat of the PCB is dissipated by the heat dissipation device, but the PCB is in passive heat dissipation and has low heat dissipation efficiency, when the power of the water pump is increased, the heat productivity of the PCB is very large, and the heat accumulation is easy to cause, so that the PBC board is overheated; 2. in the existing stator assembly of the brushless electronic water pump, an isolation sleeve, a stator core, a stator winding and the like are in a split state and are assembled in an inner cavity of an outer shell, and the assembly is complex and low in assembly precision.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the stator assembly of the brushless electronic water pump is characterized in that a stator core and a stator winding are embedded into a stator inner shell, and the stator inner shell is integrated with an installation cavity, so that the assembly difficulty is reduced.
In order to solve the technical problem, the technical scheme of the utility model is that: a stator assembly of a brushless electronic water pump comprises a plastic shell and a stator assembly fixed in the shell, wherein the stator assembly comprises a stator core, a stator winding and a plastic stator inner shell, the stator core and the stator winding are embedded in the stator inner shell, an installation cavity for installing a rotor impeller assembly is arranged at the center of the stator inner shell, a central shaft is embedded in the center of the installation cavity, a lower flange part matched with an upper cover of the electronic water pump is further arranged at the upper end of the stator inner shell, at least one installation groove is formed in the outer part of the stator inner shell, the outer wall of the stator core is exposed from the installation groove, a grounding elastic sheet is arranged in the installation groove and is extruded between the outer wall of the stator core and the shell, a heat dissipation metal plate is fixed at the bottom of the stator inner shell, and the lower end of the grounding elastic sheet is in contact with the heat dissipation metal plate, the radiating metal plate is provided with a grounding connection screw hole used for being connected with a grounding electrode of the PCB, a wiring harness of the stator winding is connected with wiring harness pins, and the wiring harness pins are embedded into the stator inner shell and the lower end of the stator inner shell is exposed and used for being connected with plug-in holes of the PCB.
As a preferred scheme, the grounding elastic sheet comprises an elastic sheet body, an upper bending portion is arranged at the upper end of the elastic sheet body, a lower bending portion is arranged at the lower end of the elastic sheet body, the upper bending portion is extruded between the outer wall of the stator core and the shell, and the lower bending portion is extruded on the heat dissipation metal plate.
As a preferred scheme, the upper end of the mounting groove is a closed groove top, and the upper end and the lower end of the elastic sheet body are respectively extruded between the groove top and the heat dissipation metal plate.
Preferably, the outer shell and the inner stator shell are integrally formed.
As a preferred scheme, a plurality of connecting counter bore protrusions protruding upwards are arranged on the heat dissipation metal plate, correspondingly, a plurality of connecting studs corresponding to the connecting counter bore protrusions one to one are arranged on the stator inner shell, and fixing bolts are arranged in the connecting counter bore protrusions and the connecting studs.
As a preferred scheme, the bottom of the installation cavity of the stator inner shell protrudes downwards to form a central installation bulge which facilitates the embedding and installation of the central shaft, the middle part of the heat dissipation metal plate is provided with an upward protruding stretching ring, the protruding stretching ring wraps the central installation bulge and is provided with a sealing ring between the central installation bulge and the central installation bulge, a heat dissipation flowing cavity is formed inside the protruding stretching ring, the bottom of the installation cavity is provided with a through hole communicated with the heat dissipation flowing cavity, and the bottom of the protruding stretching ring is provided with a plurality of heat dissipation bulges protruding upwards.
As a preferred scheme, the bottom of the stator inner shell is provided with a positioning column, and correspondingly, the heat dissipation metal plate and the PCB plate are both provided with positioning holes matched with the positioning column.
After the technical scheme is adopted, the utility model discloses an effect is: compared with the prior art, the stator assembly has the following advantages: 1. the stator core and the stator winding in the stator assembly are embedded into the stator inner shell, and the mounting cavity for mounting the rotor impeller component is also integrated into the stator inner shell, so that the integration level is higher, the assembly difficulty is reduced, and the precision is higher; 2. in the stator assembly, a mounting groove is formed in a stator inner shell, the outer wall of a stator core is exposed out of the mounting groove, a grounding elastic sheet is arranged in the mounting groove, the grounding elastic sheet directly and elastically contacts the stator core with a heat dissipation metal plate, and the heat dissipation metal plate is grounded with a PCB (printed circuit board), so that some useless energy on the stator core can be led out, electromagnetic radiation is reduced, and the stator assembly is more suitable for an electric vehicle with a plurality of electric control elements; 3. this ground connection shell fragment can elastic contact heat dissipation metal sheet, only need place in the mounting groove can, it is very convenient to assemble to this stator assembly has integrated heat dissipation metal sheet, can make things convenient for the fixed of brushless electron electronic water pump's PCB board, makes things convenient for heat conduction.
And because the grounding elastic sheet comprises an elastic sheet body, the upper end of the elastic sheet body is provided with an upper bending part, the lower end of the elastic sheet body is provided with a lower bending part, the upper bending part is extruded between the outer wall of the stator core and the shell, the lower bending part is extruded on the heat dissipation metal plate, and the upper bending part and the lower bending part of the grounding elastic sheet can be elastically extruded, so that elastic reliable contact is realized, and the grounding elastic sheet is very convenient to manufacture.
And because the upper end of the mounting groove is a closed groove top, and the upper end and the lower end of the elastic sheet body are respectively extruded between the groove top and the heat dissipation metal plate, certain pre-tightening force can be better exerted through the structure, so that the elastic sheet body can be in elastic contact with the heat dissipation metal plate more stably.
And because the heat dissipation metal plate is provided with a plurality of connecting counter bore bulges which protrude upwards, correspondingly, the stator inner shell is provided with a plurality of connecting studs which correspond to the connecting counter bore bulges one to one, and the connecting counter bore bulges and the connecting studs are internally provided with fixing bolts, the heat dissipation metal plate can be better fixed with the stator inner shell.
And because the bottom of the installation cavity of the stator inner shell protrudes downwards to form a central installation bulge which is convenient for the central shaft to be embedded and installed, the middle part of the heat dissipation metal plate is provided with an upward protruding ring which wraps the central installation bulge and is provided with a sealing ring between the central installation bulge and the protruding ring, a heat dissipation flowing cavity is formed inside the protruding ring, the bottom of the installation cavity is provided with a through hole communicated with the heat dissipation flowing cavity, the bottom of the protruding ring is provided with a plurality of upward protruding heat dissipation bulges, the heat dissipation flowing cavity formed by the protruding ring on the heat dissipation metal plate can facilitate the cooling water in the installation cavity to flow in, so that when the water pump works normally, the rotor impeller assembly in the installation cavity rotates to provide the flowing power of the cooling water, and the cooling water can enter the installation cavity when flowing and enter the heat dissipation flowing cavity through the through hole on the installation cavity, therefore, the heat of the heat dissipation metal plate can be quickly taken away, the PCB is cooled, the cooling effect is better, and meanwhile, the bottom of the protruding stretching ring is provided with a plurality of heat dissipation protrusions protruding upwards, so that the heat dissipation is further enhanced.
And because the bottom of the stator inner shell is provided with the positioning column, correspondingly, the heat dissipation metal plate and the PCB are respectively provided with the positioning hole matched with the positioning column, the positioning column is convenient for positioning and mounting the heat dissipation metal plate and the PCB, and the assembly precision is more ensured.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a perspective view of an embodiment of the present invention;
fig. 2 is a perspective view of another angle of an embodiment of the present invention;
fig. 3 is a top view of an embodiment of the invention;
FIG. 4 is a cross-sectional view of FIG. 3 at A-A;
fig. 5 is a perspective view of a heat dissipating metal plate;
fig. 6 is a perspective view of the grounding spring;
fig. 7 is a perspective view of the present invention with the heat dissipation metal plate hidden;
in the drawings: 1. a housing; 2. a stator inner housing; 3. mounting grooves; 4. a central shaft; 5. installing a chamber; 6. a heat-dissipating metal plate; 61. a protruding extension ring; 62. a heat-dissipating flow cavity; 63. a heat dissipation protrusion; 64. connecting the counter bore bulge; 65. positioning holes; 7. a positioning column; 8. a through hole; 9. a grounding elastic sheet; 91. an upper bending part; 92. a lower bent portion 92; 10. a ground bolt; 11. connecting a stud; 12. a wire harness pin; 13. a central mounting boss; 14. a seal ring; 15. a stator core is provided.
Detailed Description
The present invention will be described in further detail with reference to the following examples.
As shown in fig. 1 to 7, a stator assembly of a brushless electronic water pump includes a plastic outer casing 1 and a stator assembly fixed in the outer casing 1, where the stator assembly includes a stator core 15, a stator winding and a plastic stator inner casing 2, the stator core 15 and the stator winding are embedded in the stator inner casing 2, in this embodiment, the stator inner casing 2 and the outer casing 1 are integrally formed, and in the injection molding process, the stator core 15 and the stator winding are already assembled and are integrally injection molded during injection molding.
The center of the stator inner shell 2 is provided with an installation cavity 5 for installing a rotor impeller assembly, a central shaft 4 is embedded into the center of the installation cavity 5, the rotor impeller assembly is sleeved on the central shaft 4 and completes rotating installation, and a permanent magnet is arranged on the rotor impeller assembly due to the electromagnetic induction principle, a magnetic field can be generated after a stator winding of the stator assembly is electrified, so that the rotor impeller assembly rotates around the central shaft 4, cooling water is sent out, and the cooling water can also enter the installation cavity 5.
The upper end of the stator inner shell 2 is also provided with a lower flange part matched with the upper cover of the electronic water pump, after the upper cover and the stator inner shell 2 are fixed, a fluid chamber is formed to facilitate the entering and outputting of liquid, at least one mounting groove 3 is arranged outside the stator inner shell 2, the outer wall of the stator core 15 is exposed out of the mounting groove 3, the mounting groove 3 is internally provided with grounding elastic sheets 9, the number of the mounting grooves 3 in the embodiment is three, the number of the grounding elastic sheets 9 can be three or one, the three mounting grooves 3 can facilitate the grounding elastic sheets 9 to select proper positions for mounting, certainly, one grounding elastic sheet 9 can be mounted in each mounting groove 3, the grounding elastic sheets 9 are extruded between the outer wall of the stator core 15 and the outer shell 1, the bottom of the stator inner shell 2 is fixed with a heat dissipation metal plate 6, and the lower end of each grounding elastic sheet 9 is contacted with the heat dissipation metal plate 6, the heat dissipation metal plate 6 is provided with a grounding connection screw hole for being connected with a grounding electrode of the PCB, and the heat dissipation metal plate 6 can be electrically connected with the grounding electrode of the PCB after being fixed by a grounding bolt 10. The wire harness of the stator winding is connected with wire harness pins 12, the wire harness pins 12 are embedded into the stator inner shell 2, and the lower ends of the wire harness pins are exposed out of insertion holes for being connected with a PCB.
As shown in fig. 6, the grounding elastic sheet 9 includes an elastic sheet body, an upper bending portion 91 is disposed at the upper end of the elastic sheet body, a lower bending portion 92 is disposed at the lower end of the elastic sheet body, the upper bending portion 91 is extruded between the outer wall of the stator core 15 and the housing 1, and the lower bending portion 92 is extruded on the heat dissipation metal plate 6. In this embodiment, the upper end of the mounting groove 3 is a closed groove top, and the upper end and the lower end of the spring plate body are respectively extruded between the groove top and the heat dissipation metal plate 6.
The heat dissipation metal sheet 6 adopts aluminum plate, is provided with the protruding 64 of connecting counter bore that a plurality of is stretched to the epirelief on the heat dissipation metal sheet 6, and this connecting counter bore is protruding 64 to be provided with the connecting counter bore that makes things convenient for fixing bolt to install, and is corresponding, be provided with a plurality of and the connecting stud 11 of connecting the protruding 64 one-to-one of counter bore on the stator inner casing 2, install fixing bolt in connecting counter bore protruding 64 and the connecting stud 11. The bottom of the installation cavity 5 of the stator inner casing 2 is protruded downwards to form a central installation bulge 13 which is convenient for the central shaft 4 to be embedded and installed, the middle part of the heat dissipation metal plate 6 is provided with an upward protruded bulge ring 61, the protruded bulge ring 61 is wrapped on the central installation bulge 13 and is provided with a sealing ring 14 between the central installation bulge 13, the inside of the protruded bulge ring 61 is provided with a heat dissipation flowing cavity 62, the bottom of the installation cavity 5 is provided with a through hole 8 communicated with the heat dissipation flowing cavity 62, and the bottom of the protruded bulge ring 61 is provided with a plurality of heat dissipation bulges 63 which are protruded upwards.
The bottom of the stator inner shell 2 is provided with a positioning column 7, correspondingly, the heat dissipation metal plate 6 and the PCB are both provided with positioning holes 65 matched with the positioning columns 7, the number of the positioning columns 7 is two, and the adjustment of the installation directions of the PCB and the heat dissipation metal plate 6 is facilitated.
The utility model discloses a stator assembly compares present prior art and has following advantage:
1. the stator inner shell 2 and the stator outer shell 1 of the stator assembly are integrally formed, and the stator core 15 and the stator winding are wrapped, so that the stator assembly is integrally formed and is convenient to assemble at the later stage;
2. the stator assembly utilizes the grounding elastic sheet 9 to make the stator iron core 15 and the heat dissipation metal plate 6 in grounding contact, and leads out redundant energy, thereby reducing the electromagnetic interference on surrounding electrical elements;
3. this stator assembly has utilized heat dissipation metal sheet 6, makes things convenient for the installation and the heat dissipation of PCB board to protruding ring 61 that stretches on utilizing heat dissipation metal sheet 6 makes things convenient for the coolant liquid to dispel the heat to heat dissipation metal sheet 6, and the radiating effect is better, and protruding heat dissipation protrusion 63 who stretches the bottom of ring 61 can further improve the radiating effect.
The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and alterations made to the technical solution of the present invention without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.
Claims (7)
1. The utility model provides a brushless electronic water pump's stator module, includes the shell of plastics and is fixed in the stator module in the shell, its characterized in that: the stator assembly comprises a stator core, a stator winding and a plastic stator inner shell, the stator core and the stator winding are embedded in the stator inner shell, an installation cavity for installing a rotor impeller assembly is arranged at the center of the stator inner shell, a central shaft is embedded in the center of the installation cavity, a lower flange part matched with an upper cover of the electronic water pump is further arranged at the upper end of the stator inner shell, at least one installation groove is formed outside the stator inner shell, the outer wall of the stator core is exposed out of the installation groove, a grounding elastic sheet is arranged in the installation groove and is extruded between the outer wall of the stator core and the outer shell, a heat dissipation metal plate is fixed at the bottom of the stator inner shell, the lower end of the grounding elastic sheet is in contact with the heat dissipation metal plate, and a grounding connection screw hole for connecting with a grounding electrode of a PCB (printed circuit board) is formed in the heat dissipation metal plate, and the wire harness of the stator winding is connected with wire harness pins, and the wire harness pins are embedded into the stator inner shell, and the lower ends of the wire harness pins are exposed out of the insertion holes of the PCB and are connected with the wire harness pins.
2. The stator assembly of a brushless electric water pump as defined in claim 1, wherein: the grounding elastic sheet comprises an elastic sheet body, an upper bending part is arranged at the upper end of the elastic sheet body, a lower bending part is arranged at the lower end of the elastic sheet body, the upper bending part is extruded between the outer wall of the stator core and the shell, and the lower bending part is extruded on the heat dissipation metal plate.
3. A brushless electric water pump stator assembly as defined in claim 2, wherein: the upper end of the mounting groove is a closed groove top, and the upper end and the lower end of the elastic sheet body are respectively extruded between the groove top and the heat dissipation metal plate.
4. A brushless electric water pump stator assembly as defined in claim 3, wherein: the shell and the stator inner shell are integrally formed.
5. The stator assembly of a brushless electric water pump as defined in claim 4, wherein: the heat dissipation metal plate is provided with a plurality of connecting counter bore protrusions protruding upwards, the connecting counter bore protrusions correspond to the connecting counter bore protrusions, a plurality of connecting studs corresponding to the connecting counter bore protrusions one to one are arranged on the stator inner shell, and fixing bolts are installed in the connecting counter bore protrusions and the connecting studs.
6. The stator assembly of a brushless electric water pump as claimed in claim 5, wherein: the bottom of the installation cavity of the stator inner casing stretches the center installation arch that forms the convenient center pin embedding installation downwards, the middle part of the heat dissipation metal plate is provided with the protruding ring that stretches of stretching upwards, protruding ring parcel of stretching be provided with the sealing washer between the arch and the center installation arch of center installation arch, protruding inside of stretching the ring has formed the mobile cavity of dispelling the heat, the bottom of installation cavity is provided with the through-hole that flows the cavity intercommunication with dispelling the heat, protruding bottom of stretching the ring is provided with a plurality of heat dissipation arch of stretching upwards.
7. The stator assembly of a brushless electric water pump as claimed in claim 6, wherein: the bottom of the stator inner shell is provided with a positioning column which corresponds to the positioning column, and positioning holes matched with the positioning column are formed in the heat dissipation metal plate and the PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221087721.7U CN217522641U (en) | 2022-05-07 | 2022-05-07 | Stator assembly of brushless electronic water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221087721.7U CN217522641U (en) | 2022-05-07 | 2022-05-07 | Stator assembly of brushless electronic water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217522641U true CN217522641U (en) | 2022-09-30 |
Family
ID=83388756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221087721.7U Active CN217522641U (en) | 2022-05-07 | 2022-05-07 | Stator assembly of brushless electronic water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217522641U (en) |
-
2022
- 2022-05-07 CN CN202221087721.7U patent/CN217522641U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 8, Xinfeng Hexi Road, Tangshi, Yangshe Town, Zhangjiagang City, Suzhou City, Jiangsu Province 215600 Patentee after: Jiangsu Langxin Electric Co.,Ltd. Address before: 215600 2 Fuxin Road, Yang Shi Town, Zhangjiagang, Suzhou, Jiangsu Patentee before: JIANGSU LANGXIN ELECTRIC Co.,Ltd. |
|
| CP03 | Change of name, title or address |