CN210404852U

CN210404852U - Hollow cup brushless motor and stator assembly for hollow cup brushless motor

Info

Publication number: CN210404852U
Application number: CN201921448005.5U
Authority: CN
Inventors: 不公告发明人
Original assignee: Shenzhen Topband Co Ltd
Current assignee: Shenzhen Topband Co Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-04-24
Anticipated expiration: 2029-09-02

Abstract

The utility model relates to a coreless brushless motor and a stator assembly for the coreless brushless motor, the stator assembly for the coreless brushless motor can comprise a shell, a wire cup, an iron core and a potting colloid; the iron core is of a hollow structure, is sleeved on the periphery of the wire cup, forms an integral structure with the wire cup through the arrangement of the pouring sealant, and is contained in the casing. This a stator module for coreless brushless motor is through establishing the iron core cover in the periphery of line cup, and forms an organic whole structure through setting up the pouring sealant with this line cup to the holding is in this casing, thereby can improve the stability of iron core and the assembly of line cup, and then can improve coreless brushless motor's life and rotation effect.

Description

Hollow cup brushless motor and stator assembly for hollow cup brushless motor

Technical Field

The utility model relates to a motor, more specifically say, relate to a coreless brushless motor and be used for coreless brushless motor's stator module.

Background

The hollow cup motor belongs to a direct current, permanent magnet and servo small and special motor. On the basis of inheriting the design of a traditional motor main body, a tooth-groove-free structure is adopted, so that the eddy current loss of an iron core is reduced, and the weight and the rotational inertia of the motor are greatly reduced, so that the mechanical loss of the motor is reduced. With the increasingly wide application of the coreless motor in the industrial field, the requirement on power density is higher and higher. By attaching the core to the outer surface of the wire cup, its stability is greatly affected due to high temperature, large current, high vibration, and the like.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, a stator module for coreless brushless motor of modified is provided, further a modified motor is provided.

The utility model provides a technical scheme that its technical problem adopted is: a stator assembly for a coreless brushless motor is constructed, and comprises a shell, a wire cup, an iron core and a potting colloid;

the iron core is of a hollow structure, is sleeved on the periphery of the wire cup, forms an integral structure with the wire cup through the arrangement of the pouring sealant, and is contained in the casing.

Preferably, the wire cup is of a hollow structure and is columnar.

Preferably, the length of the iron core is equivalent to the length of the wire cup.

Preferably, the potting colloid is axially arranged on the inner side wall of the wire cup, extends to two ends of the wire cup, and radially extends to the end faces of the two ends of the iron core towards the end faces of the two ends of the wire cup respectively.

Preferably, the wire cup comprises a cylindrical body formed by winding alcohol-soluble enameled wire.

Preferably, the core includes a plurality of annular sheet-like bodies stacked one on another.

The utility model discloses still construct a coreless brushless motor, include the utility model stator module, with the rotor subassembly of stator module assembly and setting are in the hall subassembly of stator module one end.

Preferably, the rotor assembly comprises a rotating shaft penetrating through the stator assembly and the hall assembly, and magnetic steel sleeved on the periphery of the rotating shaft; the magnetic steel penetrates through the stator assembly;

and balance blocks are respectively arranged at two ends of the magnetic steel and sleeved on the periphery of the rotating shaft.

Preferably, the stator assembly further comprises a front end cover and a rear end cover which are arranged at two ends of the casing of the stator assembly;

the Hall assembly is arranged between the rear end cover and the stator assembly.

Preferably, the coreless brushless motor comprises bearings sleeved at two ends of the rotating shaft and mounted on the front end cover and the rear end cover.

Implement the utility model discloses a coreless brushless motor and be used for coreless brushless motor's stator module has following beneficial effect: this a stator module for coreless brushless motor is through establishing the iron core cover in the periphery of line cup, and forms an organic whole structure through setting up the pouring sealant with this line cup to the holding is in this casing, thereby can improve the stability of iron core and the assembly of line cup, and then can improve coreless brushless motor's life and rotation effect.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural view of a coreless brushless motor according to some embodiments of the present invention;

FIG. 2 is a longitudinal cross-sectional view of the coreless brushless motor shown in FIG. 1;

FIG. 3 is a transverse cross-sectional view of the coreless brushless motor shown in FIG. 1;

FIG. 4 is a schematic view of the glue-filled state of the integrated structure of the core and the wire cup of the stator assembly shown in FIG. 2;

fig. 5 is a transverse cross-sectional view of the core and wire cup of fig. 4 formed as a unitary structure;

fig. 6 is a schematic structural diagram of a glue filling hole of the glue filling mold shown in fig. 4.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 to 3 show a preferred embodiment of the motor of the present invention. The motor can be used as a driving mechanism and has the advantages of simple structure, strong stability and long service life.

As shown in fig. 1 to 3, the coreless brushless motor may include a stator assembly 10, a rotor assembly 20, a hall assembly 30, a front cover 40, and a rear cover 50; the stator assembly 10 can be assembled with the rotor assembly 20, which can drive the rotor assembly 20 to rotate under the power-on device. The rotor assembly 20 can be disposed in the stator assembly 10, and can be used for power output, and the hall assembly 30 can be disposed at one end of the stator assembly 10, and can be used for reversing a magnetic field and detecting a direction of the magnetic field. In some embodiments, the front end cover 40 and the back end cover 50 can be disposed at both ends of the stator assembly 10, which secures the stator assembly 10.

Further, in some embodiments, the stator assembly 10 may include a casing 11, a core 12, a wire cup 13, a potting compound 14; the housing 11 can be used to house the iron core 12, the wire cup 13, and the potting compound 14. The iron core 12 may be disposed in the housing 11, and it may be sleeved on the periphery of the wire cup 13. The wire cup 13 may be used for mounting the core 12. The core 12 and the wire cup 13 may be formed as an integral structure by disposing the potting compound 14, and may be accommodated in the housing 11.

Further, in some embodiments, the housing 11 may be a hollow structure, which may be cylindrical, and the inner diameter of the hollow structure may be larger than that of the core 12. The housing 11 may be made of metal, and it is understood that in other embodiments, the housing 11 may not be limited to be made of metal, but may be made of plastic.

Further, in some embodiments, the core 12 may be a hollow structure, and it may be a cylinder. The iron core 12 may be sleeved on the periphery of the wire cup 13, and may include a plurality of annular sheet-shaped bodies stacked one on another. The plurality of sheet-shaped main bodies can be circular silicon steel sheets and can form a columnar body through riveting. The core 12 may have an outer diameter corresponding to an inner diameter of the housing 11 and an inner diameter corresponding to an outer diameter of the wire cup 13. In some embodiments, the length of the core 12 may be comparable to the length of the wire cup 13, and the end face of the core 12 may be flush with the end face of the wire cup 13.

Further, in some embodiments, the wire cup 13 may have a hollow structure and may be in a cylindrical shape, and it may include a winding post, which may be a cylindrical body formed by winding an alcohol-soluble enameled wire, and the alcohol-soluble enameled wire may be an alcohol-soluble self-adhesive wire, and may be shaped into a cylindrical body at normal temperature after being treated with alcohol and at a high temperature, or may be shaped into a cylindrical body at a high temperature with an acceleration. The bobbin 13 can be formed by a multi-slot winding in a full circle, and the span and the number of slots are not limited.

As shown in fig. 2 to 6, further, in some embodiments, the potting compound 14 may be disposed on an inner sidewall of the wire cup 13 along an axial direction, and may extend to both ends of the wire cup 13, and extend to end faces of both ends of the core 12 along a radial direction toward end faces of both ends of the wire cup 13, respectively, so as to wrap the wire cup 13 and the core 12, and bond the wire cup 13 and the core 12 into an integral structure.

As shown in fig. 4 to fig. 6, during encapsulation, the wire cup 13 is sleeved on the inner film 201 of the potting mold, then the iron core 12 is sleeved on the periphery of the wire cup 13, then the film sleeve 202 is sleeved on the periphery of the iron core 12, then the upper cover 203 is covered, and then the potting adhesive is injected between the wire cup 13 and the inner film 201 from the potting hole 2031 of the upper cover 203, so that the potting adhesive extends towards two ends of the wire cup 13, and the wire cup 13 and the iron core 12 are encapsulated into a whole. The potting agent can be matched for use during potting, and a line outlet can be led out from the potting hole during potting. The bobbin 13 and the core 12 are formed into an integral structure, which is then removed from the mold and then installed in the housing 11, and may be fixed to the housing 11 using glue.

As further shown in fig. 1-2, in some embodiments, the rotor assembly 20 may include a rotating shaft 21 and magnetic steel 22; the shaft 21 can pass through the setting subassembly 10 and the hall element 30, and specifically, the shaft 21 can pass through the wire cup 13, and one end of the shaft can pass through the hall element 30 and is connected with the rear end cover 50, and the other end of the shaft can pass through the front end cover 40 to output power through rotation. The magnetic steel 22 is disposed through the stator assembly 10, and specifically, can be sleeved on the periphery of the rotating shaft 21 and is located between the wire cup 13 and the magnetic steel 22. In some embodiments, the two ends of the magnetic steel 22 may be further provided with a balance weight 23; the balance weight 23 can be sleeved on the rotating shaft 21 and can be attached to the magnetic steel 22.

Further, in some embodiments, the hall assembly 30 can be disposed between the back end cap 50 and the stator assembly 10, which can include a hall plate 31 and a hall sensor 32 disposed on the hall plate 31; the hall plate 31 can be fixed with the stator assembly 10 by using quick-drying glue, after the structural member formed by the wire cup 13 and the iron core 12 is installed in the casing 11, the hall assembly 30 can be arranged at one end of the stator assembly 10, the position of the hall plate 31 can be adjusted, and after the adjustment, the hall plate 31 can be fixed with the stator assembly 10 by using quick-drying glue. The hall element 30 may also be pre-adjusted prior to installation of the structural members into the housing 11 to ensure that the final position of the hall element is controllable from the mounting position of the housing 11 or the front cover 50. After the structural part is installed in the machine shell 11, the position of the structural part can be adjusted to ensure the wire outlet position of the motor, the position of the motor wire outlet is opposite to the position of the machine shell 11, and the Hall position does not need to be additionally adjusted.

Further, in some embodiments, the front cover 40 may be disposed at one end of the housing 11, may be detachably connected to the housing 11, may be inserted into the housing 11, and may have a through hole for the rotation shaft 21 to pass through.

Further, in some embodiments, the rear cover 50 may be disposed at the other end of the housing 11, which may be detachably connected to the housing 11, and may be inserted into the housing 11, and an end of the rotating shaft 21 away from the front cover 40 may be snapped into the rear cover 50 and detachably connected to the rear cover 50.

Further, in some embodiments, the shaft 21 is away from the front end cover 40 and extends out of one end of the stator assembly 10 to be sleeved with the sleeve 60; one end of the sleeve 60 may be connected to the rear end cap 50 and the other end may be connected to the weight 23.

Further, in some embodiments, the coreless brushless motor may further comprise a bearing 70; the two bearings 70 may be respectively located at two ends of the rotating shaft 21, and may be respectively mounted on the front cover 40 and the rear cover 50, which may facilitate the rotation of the rotating shaft 21.

Further, in some embodiments, an end of the rotating shaft 21 near the front end cover 40 may be sleeved with an elastic element 80, the elastic element 80 may be located between the front bearing 70 and the balance block 23, and may be a hollow structure, which may be sleeved on the rotating shaft 21, and may function to increase the resilience of the rotating shaft 21, so as to facilitate the reciprocating rotation of the rotating shaft 21.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A stator assembly for a coreless brushless motor, comprising a housing (11), a wire cup (13), an iron core (12), and a potting compound (14);

the iron core (12) is of a hollow structure, the iron core (12) is sleeved on the periphery of the wire cup (13), and forms an integral structure with the wire cup (13) through the arrangement of the potting colloid (14), and is accommodated in the casing (11).

2. A stator assembly for a coreless brushless motor according to claim 1, wherein the wire cup (13) is of a hollow structure and has a cylindrical shape.

3. A stator assembly for a coreless brushless motor according to claim 2, wherein the length of the core (12) is comparable to the length of the wire cup (13).

4. The stator assembly for the coreless brushless motor of claim 2, wherein the potting compound (14) is axially disposed on an inner sidewall of the wire cup (13), extends to both ends of the wire cup (13), and radially extends to end surfaces of both ends of the core (12) toward end surfaces of both ends of the wire cup (13), respectively.

5. A stator assembly for a coreless brushless motor according to claim 1, wherein the wire cup (13) comprises a cylinder of wound alcohol-soluble enameled wire.

6. A stator assembly for a coreless brushless motor according to claim 1, wherein the core (12) includes a plurality of sheet-like bodies arranged in a stack and having a ring shape.

7. A coreless brushless motor, comprising a stator assembly (10) according to any of claims 1 to 6, a rotor assembly (20) assembled with the stator assembly (10), and a hall assembly (30) disposed at one end of the stator assembly (10).

8. The coreless brushless motor of claim 7, wherein the rotor assembly (20) includes a rotating shaft (21) penetrating through the stator assembly (10) and the hall assembly (30), and magnetic steel (22) sleeved on the periphery of the rotating shaft (21); the magnetic steel (22) penetrates through the stator assembly (10);

the two ends of the magnetic steel (22) are respectively provided with a balance block (23), and the balance blocks (23) are sleeved on the periphery of the rotating shaft (21).

9. The coreless brushless motor of claim 8, further comprising a front end cap (40) and a rear end cap (50) disposed at both ends of a housing (11) of the stator assembly (10);

the Hall assembly (30) is disposed between the back end cap (50) and the stator assembly (10).

10. The coreless brushless motor of claim 9, including bearings (70) fitted over both ends of the shaft (21) and mounted on the front end cap (40) and the rear end cap (50).