Brushless cooling fan with waterproof function

Abstract

The utility model discloses a brushless heat dissipation fan with waterproof function, including fan blade, wind cover and motor, and the motor includes rear end cover and machine shell, and the inside assembly of rear end cover has motor shaft, and the assembly of rotor has on motor shaft, and the inside assembly of machine shell has stator, and stator and rotor cooperate, and the inside rear side assembly of rear end cover has bearing, and motor shaft installs in bearing, and the recess a of rear end cover bearing chamber place is provided with, and the assembly of O type ring a has in recess a, and the recess b of setting up has on rear end cover, and the sealing adhesive of coating has in recess b place of machine shell, the brushless heat dissipation fan with waterproof function's setting, and the recess of setting up has in rear end cover bearing chamber, and the O type of bigger hardness is installed in recess, and when fan blade presses into motor shaft, and the pressure of producing extrudes O type ring to bearing, and force transmission reaches rear end cover, like this can complete fan blade assembly, and then realizes the waterproof performance of whole.

Description

Technical Field

[0001] This utility model relates to the field of brushless motor technology, specifically a waterproof brushless cooling fan. Background Technology

[0002] Currently, most battery energy storage systems employ air-cooled thermal management technology to effectively dissipate heat from the batteries, making the cooling fan a crucial thermal management component. DC brushless cooling fans, with their long lifespan and excellent speed regulation performance, are the preferred choice. However, most battery energy storage systems operate outdoors in harsh environments, constantly exposed to dust, snow, and rain, while their electronic components (controllers) have high waterproofing requirements. Therefore, battery energy storage systems also place higher waterproofing demands on brushless cooling fans, necessitating the design of new technical solutions. Utility Model Content

[0003] The purpose of this invention is to provide a waterproof brushless cooling fan to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a waterproof brushless cooling fan, comprising a fan blade, a fan cover and a motor, wherein the motor comprises a rear end cover and a housing, the rear end cover is internally fitted with a motor shaft, and a rotor is fitted on the motor shaft;

[0005] The housing is equipped with a stator, which cooperates with the rotor. The rear end cover is equipped with a controller. The rear side of the rear end cover is equipped with a bearing, and the motor shaft is installed in the bearing.

[0006] The bearing chamber of the rear end cover is provided with a groove a, and an O-ring a is installed in the groove a. The rear end cover is provided with a groove b, and the housing is coated with sealant at the groove b.

[0007] A groove c is provided in the bearing chamber of the housing, and an O-ring b is assembled in the groove c;

[0008] The rear end cover is equipped with a controller lead wire inside. The end of the controller lead wire extends to the outside of the rear end cover without a lead wire assembly. A potting compound chamber is provided at the lead wire assembly and the controller lead wire. A potting plug is provided at the potting compound chamber. The rear end cover is equipped with a lead wire end cap at the lead wire assembly.

[0009] A screw hole is provided at the connection between the housing and the rear cover, and a bolt body is screwed into the screw hole.

[0010] As a preferred embodiment of the present invention, a waterproof brushless cooling fan is provided with a heat sink on the outer end face of the rear end cover and a flat surface on the inner end face of the rear end cover.

[0011] As a preferred embodiment of the present invention, a brushless cooling fan with waterproof function is provided inside the O-ring a, and an elastic element is provided inside the filling cavity.

[0012] As a preferred embodiment of the present invention, a waterproof brushless cooling fan is provided with a circular groove at the bottom end of the bolt body, and a bolt rod is installed at the bottom end of the circular groove. The bolt rod is screwed into the screw hole at the connection between the rear end cover and the housing.

[0013] As a preferred embodiment of the present invention, a waterproof brushless cooling fan is provided, wherein a fixing ring is installed on the upper outer end of the bolt rod, and an annular pressure plate, a spring, and an annular rubber sheet are fitted on the circumferential surface of the bolt rod.

[0014] As a preferred embodiment of the present invention, a waterproof brushless cooling fan has an extrusion block installed at the upper edge of the annular rubber sheet.

[0015] As a preferred embodiment of the present invention, a brushless cooling fan with waterproof function is provided, wherein the fan blades are assembled inside a wind shield, and the motor is assembled on the rear side of the wind shield.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the design of this waterproof brushless cooling fan is reasonable.

[0017] By adopting a holeless design for the end cover, the fan blade and motor shaft are tightly fitted. To prevent the motor shaft from moving and scraping against the rear end cover during fan blade assembly, a groove is provided in the bearing chamber of the rear end cover. A hard O-ring is installed in the groove. When the fan blade is pressed into the motor shaft, the pressure generates pressure that causes the bearing to squeeze the O-ring. The O-ring deforms under the force and becomes shorter, so that the motor shaft contacts the rear end cover and the force is transmitted to the rear end cover. This completes the fan blade assembly and achieves overall waterproof performance. Attached Figure Description

[0018] Figure 1 This is a side view of the present invention;

[0019] Figure 2 This is a front view of the present utility model;

[0020] Figure 3 This is an internal side view of the rear end cover of this utility model;

[0021] Figure 4 This is a front view of the interior of the rear end cover of this utility model;

[0022] Figure 5 This is a side view of the rear end cover of this utility model;

[0023] Figure 6 This is a schematic diagram of the O-ring a of this utility model;

[0024] Figure 7 This is a schematic diagram of the bolt body of this utility model.

[0025] In the diagram: 1. Fan blade; 2. Wind shield; 3. Motor; 4. Rear end cover; 5. O-ring a; 6. Sealant; 7. Controller; 8. Rotor; 9. Stator; 10. Lead wire end cover; 11. Potting compound chamber; 12. Lead wire assembly; 13. Potting port plug; 14. Controller lead wire; 15. Bearing; 16. Motor shaft; 17. Housing; 18. Groove a; 19. Heat sink; 20. Plane; 21. Filling cavity; 22. Elastic element; 23. Bolt body. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7 This utility model provides a technical solution:

[0028] In this technical solution, a waterproof brushless cooling fan includes a fan blade 1, a fan cover 2, and a motor 3. The motor 3 includes a rear end cover 4 and a housing 17. A motor shaft 24 is assembled inside the rear end cover 4, and a rotor 8 is assembled on the motor shaft 24. A stator 9 is assembled inside the housing 17, and the stator 9 and the rotor 8 cooperate. A controller 7 is assembled inside the rear end cover 4, and a bearing 15 is assembled on the rear side of the interior of the rear end cover 4. The motor shaft 24 is installed in the bearing 15. A groove a18 is provided at the bearing chamber of the rear end cover 4, and an O-ring a5 is assembled in the groove a18. A groove b is provided on the rear end cover 4. The housing 17 is coated with sealant 6 at the groove b; the bearing chamber of the housing 17 has a groove c, and an O-ring b is installed in the groove c; the controller lead 14 is installed inside the rear cover 4, and the end of the controller lead 14 extends to the outside of the rear cover 4 and is provided with a lead wire assembly 12. A potting compound chamber 11 is provided at the lead wire assembly 12 and the controller lead 14, and a potting plug 13 is provided at the potting compound chamber 11; a screw hole is provided at the connection between the housing 17 and the rear cover 4, and a bolt body 23 is screwed into the screw hole. The rear cover 4 is equipped with a lead wire end cap 10 at the lead wire assembly 12.

[0029] In this technical solution, the rear cover 4 adopts a holeless design, and the fan blade 1 and the motor shaft are tightly fitted. To prevent the motor shaft 24 from moving and scraping against the rear cover 4 during the assembly of the fan blade 1, a groove 20 is provided in the bearing chamber of the rear cover 4. A relatively hard O-ring 5 is installed in the groove 20. When the fan blade 1 is pressed into the motor shaft 24, the pressure generated causes the bearing 15 to squeeze the O-ring 5. The O-ring 5 deforms under the force and becomes shorter, and the motor shaft 24 contacts the rear cover 4. The force is transmitted to the rear cover, thus completing the assembly of the fan blade 1. After the assembly is completed, the assembly pressure disappears, the O-ring 5 springs back, and the rotor 8 moves towards the fan blade. The motor shaft 24 is disengaged from the end cover 4, ensuring that the rotating component shaft 23 does not contact the stationary component end cover 4 and that normal operation is possible. The bearing chamber of the housing 7 is provided with a sealing groove, in which an O-ring is placed. Through the tight fit between the fan blade 1 and the shaft 23, water is prevented from entering from the shaft extension end. At the same time, heat sinks are provided on the outer circle of the housing to facilitate heat dissipation of the stator 8. After the motor lead wire 12 is welded to the controller lead wire 14, a potting chamber for potting compound 11 is formed by the lead wire cover 10 and the rear end cover 4. After potting, the potting port is blocked with the potting port plug 13, thus preventing water from entering from the lead wire assembly 12.

[0030] In some technical solutions, a heat sink 19 is provided on the outer end face of the rear end cover 4, and a flat surface 20 is provided on the inner end face of the rear end cover 4.

[0031] In this technical solution, the outer end face of the rear end cover 4 is provided with multiple heat sinks 19, and the inner end face is machined with a flat surface 20. The flat surface 20 is in close contact with the heat dissipation surface of the power components on the controller 7 to ensure good heat dissipation. The rear end cover 4 is provided with a groove, and when it is assembled with the housing 17 of the stator 9 component, sealant 6 is applied. After the sealant 6 is cured, it forms a sealing ring to prevent water from entering from the joint between the rear end cover 4 and the housing 17 of the stator 9 component.

[0032] In some technical solutions, the O-ring a5 has a filling cavity 21 inside, and the filling cavity 21 has an elastic element 22 inside.

[0033] In this technical solution, the elasticity of the O-ring a5 can be improved by the elastic element 22.

[0034] In some technical solutions, a circular groove 231 is provided at the bottom end of the bolt body 23, and a bolt rod 233 is installed at the bottom end of the circular groove 231. The bolt rod 233 is screwed into the screw hole at the connection between the rear end cover 4 and the housing 17.

[0035] In this technical solution, the rear cover 4 and the housing 17 are connected by a threaded connection.

[0036] In some technical solutions, a retaining ring 236 is installed on the upper outer end of the bolt rod 233, and an annular pressure plate 235, a spring 237 and an annular rubber sheet 232 are fitted on the circumferential surface of the bolt rod 233.

[0037] In this technical solution, the annular pressure plate 235 is located above the fixed ring 236, the spring 237 is located above the annular pressure plate 235, and the annular rubber sheet 232 is located below the fixed ring 236.

[0038] In some technical solutions, an extrusion block 234 is installed at the upper edge of the annular rubber sheet 232.

[0039] In this technical solution, the annular pressure plate 235 is pressed downward by the spring 237, and the extrusion block 234 is pressed downward by the annular pressure plate 235, so that the extrusion block 234 further extrudes the edge of the annular rubber sheet 232, thereby improving the sealing effect.

[0040] In some technical solutions, the fan blade 1 is installed inside the wind shield 2, and the motor 3 is installed on the rear side of the wind shield 2.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A waterproof brushless cooling fan, comprising a fan blade (1), a fan cover (2), and a motor (3), characterized in that, The motor (3) includes a rear end cover (4) and a housing (17). The motor shaft (24) is installed inside the rear end cover (4), and a rotor (8) is installed on the motor shaft (24). The housing (17) is equipped with a stator (9), which cooperates with the rotor (8). The rear end cover (4) is equipped with a controller (7). The rear end cover (4) is equipped with a bearing (15) on its inner rear side. The motor shaft (24) is installed in the bearing (15). The bearing chamber of the rear end cover (4) is provided with a groove a (18), and an O-ring a (5) is installed in the groove a (18). The rear end cover (4) is provided with a groove b, and the housing (17) is coated with sealant (6) at the groove b. The bearing chamber of the housing (17) is provided with a groove c, and an O-ring b is installed in the groove c; The rear end cover (4) is equipped with a controller lead wire (14). The end of the controller lead wire (14) extends to the outside of the rear end cover (4) and is provided with a lead wire assembly (12). A potting glue chamber (11) is provided at the lead wire assembly (12) and the controller lead wire (14). A potting plug (13) is provided at the potting glue chamber (11). The rear end cover (4) is equipped with a lead wire end cap (10) at the lead wire assembly (12). A screw hole is provided at the connection between the housing (17) and the rear cover (4), and a bolt body (23) is screwed into the screw hole.

2. The brushless cooling fan with waterproof function according to claim 1, characterized in that, A heat sink (19) is provided on the outer end face of the rear end cover (4), and a plane (20) is provided on the inner end face of the rear end cover (4).

3. A waterproof brushless cooling fan according to claim 1, characterized in that, The O-ring a (5) has a filling cavity (21) inside, and the filling cavity (21) has an elastic element (22) inside.

4. A brushless cooling fan with waterproof function according to claim 1, characterized in that, The bottom end of the bolt body (23) is provided with a circular groove (231), and a bolt rod (233) is installed at the bottom end of the circular groove (231). The bolt rod (233) is screwed into the screw hole at the connection between the rear end cover (4) and the housing (17).

5. A waterproof brushless cooling fan according to claim 4, characterized in that, A retaining ring (236) is installed on the upper outer end of the bolt rod (233), and an annular pressure plate (235), a spring (237) and an annular rubber sheet (232) are fitted on the circumferential surface of the bolt rod (233).

6. A brushless cooling fan with waterproof function according to claim 5, characterized in that, An extrusion block (234) is installed at the upper edge of the annular rubber sheet (232).

7. A waterproof brushless cooling fan according to claim 1, characterized in that, The fan blade (1) is installed inside the wind shield (2), and the motor (3) is installed on the rear side of the wind shield (2).

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