CN218958654U

CN218958654U - Magnetic steel fixing assembly and outer rotor motor

Info

Publication number: CN218958654U
Application number: CN202223052808.3U
Authority: CN
Inventors: 吴坤; 甘成维; 詹春保; 卢彬
Original assignee: Wolong Electric Shanghai Central Research Institute Co ltd; Zhejiang Longchuang Motor Technology Innovation Co ltd; Wolong Electric Group Co Ltd
Current assignee: Wolong Electric Shanghai Central Research Institute Co ltd; Zhejiang Longchuang Motor Technology Innovation Co ltd; Wolong Electric Drive Group Co Ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-05-02
Anticipated expiration: 2032-11-16

Abstract

The application discloses magnet steel fixed subassembly and external rotor motor. The magnetic steel fixing component comprises a magnetic steel sleeve, a magnetic steel block, a rotor turntable and a magnetic steel fixing ring. The inner wall surface of the magnetic steel sleeve is provided with a rubber groove; the magnetic steel blocks are arranged at intervals along the circumferential direction of the inner wall surface of the magnetic steel sleeve, and are adhered to the inner wall of the magnetic steel sleeve through glue filled in the glue groove, and a positioning gap is formed between two adjacent magnetic steel blocks; the rotor turntable cover is arranged at the first end of the magnetic steel sleeve, a plurality of first positioning convex ribs are arranged on the circumference of the rotor turntable, and the first positioning convex ribs are inserted in the positioning gaps in a one-to-one correspondence manner; the magnetic steel fixing ring is arranged at the second end of the magnetic steel sleeve and comprises an annular main body and a plurality of second positioning convex ribs, and the second positioning convex ribs are inserted in the positioning gaps in a one-to-one correspondence manner. The application can solve the problems that glue overflows easily in the magnetic steel bonding process in the prior art, the tool is bonded on the magnetic steel sleeve and the magnetic steel is not firmly bonded.

Description

Magnetic steel fixing assembly and outer rotor motor

Technical Field

The application relates to the technical field of motors, in particular to a magnetic steel fixing assembly and an outer rotor motor.

Background

The motor may be divided into an inner rotor motor and an outer rotor motor according to the position of the rotor, the rotor of the outer rotor motor being outside the stator. The outer rotor motor is widely applied to the fields of fans, unmanned aerial vehicles, hub motors and the like.

The magnetic steel fixing component of the outer rotor motor comprises a rotor turntable, a magnetic steel sleeve and magnetic steel, wherein in the prior art, the magnetic steel is uniformly distributed on the inner wall of the magnetic steel sleeve through glue circumferences, then the rotor turntable is connected with the magnetic steel sleeve through screws, and the installation mode has the following three problems:

(1) The magnet steel contacts with the whole face of the magnet steel sleeve, glue overflows along the periphery of the magnet steel during pasting, excessive glue waste is caused, and cleaning is needed. And moreover, the adhesive residue between the magnetic steel and the magnetic steel sleeve is not controllable, and whether the magnetic steel is uniform or not is not known.

(2) The tool is also needed to realize positioning when a piece of magnetic steel is adhered to the magnetic steel sleeve, and if the tool is carelessly operated, the tool can be adhered together and cannot be taken down, so that the operation is extremely complex and the cost is high.

(3) The magnetic steel and the magnetic steel sleeve are completely fixed by glue, and the magnetic steel has no other fixing devices in the circumferential direction and the axial direction, so that certain risks exist in the long-term operation process.

Disclosure of Invention

The main aim of this application is to provide a magnet steel fixed subassembly and external rotor motor to solve the magnet steel bonding process among the prior art and take place the glue easily and spill over, the frock is glued on the magnet steel sleeve and the not firm problem of magnet steel bonding.

According to an aspect of the embodiments of the present application, there is provided a magnetic steel fixing assembly, including:

the magnetic steel sleeve is provided with a rubber groove on the inner wall surface;

the magnetic steel blocks are arranged at intervals along the circumferential direction of the inner wall surface of the magnetic steel sleeve, and are adhered to the inner wall of the magnetic steel sleeve through glue filled in the glue groove, and a positioning gap is formed between two adjacent magnetic steel blocks;

the rotor turntable is covered at the first end of the magnetic steel sleeve, a plurality of first positioning ribs are arranged on the circumference of the rotor turntable, and the first positioning ribs are inserted in the positioning gaps in a one-to-one correspondence manner;

the magnetic steel fixing ring is arranged at the second end of the magnetic steel sleeve and comprises an annular main body and a plurality of second positioning convex ribs, the second positioning convex ribs are arranged along the circumferential interval of the annular main body, and the second positioning convex ribs are inserted in the positioning gaps in a one-to-one correspondence manner.

Further, the rubber groove is an annular groove, and the annular groove is arranged along the circumferential direction of the inner wall surface of the magnetic steel sleeve.

Further, the annular grooves are multiple, and the annular grooves are arranged at intervals along the axial direction of the magnetic steel sleeve.

Further, a plurality of annular grooves are arranged at least at two ends and the middle part of the length direction of the magnetic steel block.

Further, the periphery of the rotor turntable is provided with an annular flange, the annular flange is embedded at the first end of the magnetic steel sleeve, and the first positioning convex rib is arranged on the annular flange.

Further, the annular flange is connected with the magnetic steel sleeve through at least one of adhesion, welding or locking.

Further, the annular flange is fixedly connected with the magnetic steel fixing ring through a locking screw.

Further, the rotor carousel is including the first disk body and the second disk body of range upon range of setting, first disk body with be provided with a plurality of supporting ribs between the second disk body, a plurality of the supporting rib is followed the radial muscle of rotor carousel is radial direction interval arrangement, adjacent two enclose between the supporting rib and establish the louvre.

Further, the annular main body is embedded at the second end of the magnetic steel sleeve in an interference fit mode.

On the other hand, the embodiment of the application also discloses an outer rotor motor, wherein the outer rotor motor is the magnetic steel fixing component.

Compared with the prior art, the technical scheme of the application has at least the following technical effects:

because be provided with gluey groove on the telescopic inside wall of magnet steel in this application, glue the inslot through this gluey inslot point glue and bond fixedly to the magnet steel piece, for among the prior art at the telescopic internal face coating glue of magnet steel to the fixed mode of magnet steel piece bonding, the bonding mode in this application is less to glue use amount, is difficult to take place glue overflow phenomenon.

Meanwhile, in the process of bonding the magnetic steel blocks, the bonding of the magnetic steel blocks can be realized without other tools, and the phenomenon that the tools are bonded on the magnetic steel sleeve can not occur.

In addition, the two ends of the magnetic steel sleeve are respectively provided with a rotor turntable and a magnetic steel fixing ring, the rotor turntable and the magnetic steel fixing rings can limit the magnetic steel block from the two ends of the magnetic steel block, and when the magnetic steel fixing assembly is installed in an outer rotor motor, the magnetic steel block is not easy to loosen or fall off after long-term running, and the magnetic steel fixing assembly is simple in structure, stable and reliable.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic structural diagram of a magnetic steel fixing assembly disclosed in an embodiment of the present application;

FIG. 2 is a schematic view of a magnetic steel fixing assembly according to an embodiment of the present disclosure after the magnetic steel fixing ring and the magnetic steel block are removed;

FIG. 3 is a schematic view of a rotor disk according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a magnetic steel fixing ring disclosed in an embodiment of the present application.

Wherein the above figures include the following reference numerals:

10. a magnetic steel sleeve; 11. a glue groove; 20. a magnetic steel block; 30. a rotor turntable; 31. a first positioning convex rib; 32. an annular flange; 33. a first tray; 34. a second tray body; 35. a support rib; 36. a heat radiation hole; 40. a magnetic steel fixing ring; 41. an annular body; 42. a second positioning convex rib; 50. positioning the gap; 60. a locking piece.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1 to 4, according to an embodiment of the present application, there is provided a magnetic steel fixing assembly including a magnetic steel sleeve 10, a magnetic steel block 20, a rotor turntable 30, and a magnetic steel fixing ring 40.

Wherein, the inner wall surface of the magnetic steel sleeve 10 is provided with a glue groove 11; the magnetic steel blocks 20 are a plurality of, the magnetic steel blocks 20 are arranged at intervals along the circumferential direction of the inner wall surface of the magnetic steel sleeve 10, and are adhered to the inner wall of the magnetic steel sleeve 10 through glue filled in the glue groove 11, and a positioning gap 50 is formed between two adjacent magnetic steel blocks 20; the rotor turntable 30 is covered at the first end of the magnetic steel sleeve 10, a plurality of first positioning ribs 31 are arranged on the circumference of the rotor turntable 30, and the first positioning ribs 31 are inserted in the positioning gaps 50 in a one-to-one correspondence manner; the magnetic steel fixing ring 40 is disposed at the second end of the magnetic steel sleeve 10, the magnetic steel fixing ring 40 includes an annular main body 41 and a plurality of second positioning ribs 42, the plurality of second positioning ribs 42 are disposed at intervals along the circumferential direction of the annular main body 41, and the second positioning ribs 42 are inserted in the positioning gaps 50 in a one-to-one correspondence manner.

When the magnetic steel block 20 is actually installed, the rotor turntable 30 is firstly installed at the first end of the magnetic steel sleeve 10, at this time, a plurality of first positioning ribs 31 on the rotor turntable 30 are arranged on the inner side of the magnetic steel sleeve 10, and two adjacent first positioning ribs 31 and the rotor turntable 30 can be arranged to form a groove structure. After the rotor turntable 30 is mounted on the magnetic steel sleeve 10, glue is dispensed in the glue groove 11 of the inner wall surface of the magnetic steel sleeve 10, then the magnetic steel block 20 is placed in the magnetic steel sleeve 10, one end of the magnetic steel block 20 is clamped in a groove structure formed by surrounding the first positioning convex rib 31 and the rotor turntable 30, then the magnetic steel block 20 is bonded and fixed on the inner wall surface of the magnetic steel sleeve 10 through the glue in the glue groove 11, after the magnetic steel block 20 is bonded on the inner wall surface of the magnetic steel sleeve 10 one by one, the magnetic steel fixing ring 40 is mounted at the second end of the magnetic steel sleeve 10, in the process, the annular main body 41 can stop the second end of the magnetic steel block 20, and the second positioning convex rib 42 on the annular main body 41 can be clamped in the positioning gap 50 between two adjacent magnetic steel blocks 20 to separate and fix the two adjacent magnetic steel blocks 20, so that the structure is stable and reliable.

According to the above structure, it can be known that, since the inner side wall of the magnetic steel sleeve 10 in the present embodiment is provided with the glue groove 11, the magnetic steel block 20 is adhered and fixed by injecting glue into the glue groove 11, compared with the manner of adhering and fixing the magnetic steel block 20 by coating glue on the inner side wall of the magnetic steel sleeve 10 in the prior art, the adhesive manner in the present embodiment has less glue consumption and is not easy to overflow glue. Meanwhile, in the process of bonding the magnetic steel blocks 20, the bonding of the magnetic steel blocks 20 can be realized without other tools, and the phenomenon that the tools are bonded on the magnetic steel sleeve 10 can not occur. In addition, the two ends of the magnetic steel sleeve 10 in the embodiment are respectively provided with the rotor turntable 30 and the magnetic steel fixing ring 40, the rotor turntable 30 and the magnetic steel fixing ring 40 can limit the magnetic steel block 20 from the two ends of the magnetic steel block 20, and when the magnetic steel fixing assembly is installed in an outer rotor motor, the problem that the magnetic steel block 20 loosens or falls off is not easy to occur during long-term running, and the structure is simple, stable and reliable.

In this embodiment, the magnetic steel sleeve 10 is a circular sleeve structure, the glue groove 11 is an annular groove, the annular groove is arranged along the circumference of the inner wall surface of the magnetic steel sleeve 10, after glue is dispensed into the glue groove 11, the glue can flow along the annular groove, so that a plurality of magnetic steel blocks 20 on the circumference of the inner wall surface of the magnetic steel sleeve 10 can be conveniently bonded and fixed, the structure is simple, the glue usage amount is controllable, and the phenomenon of glue overflow is not easy to occur.

Of course, in other embodiments of the present application, the glue groove 11 may be a strip groove, a corrugated groove or other special-shaped grooves, which are all within the scope of the present application as long as they are other variants under the concept of the present application.

Optionally, the annular grooves are multiple, and the multiple annular grooves are arranged at intervals along the axial direction of the magnetic steel sleeve 10, so that after glue is dispensed in the annular grooves, different positions of the magnetic steel block 20 in the length direction can be bonded and fixed, and the magnetic steel block 20 can be stably bonded and fixed on the magnetic steel sleeve 10. Illustratively, the annular groove may be two, three, four, or more than four.

Further, the plurality of annular grooves in the present embodiment are at least arranged at two ends and a middle part of the magnetic steel block 20 in the length direction, that is, the plurality of annular grooves are at least distributed at three positions of the magnetic steel block 20 in the length direction, so that after glue is dispensed in the annular grooves, the three positions of the magnetic steel block 20 in the upper, middle and lower positions can be effectively bonded and fixed, and the bonding stability of the magnetic steel block 20 in the present embodiment can be further improved.

Of course, in other embodiments of the present application, the plurality of annular grooves may be uniformly arranged at intervals along the length direction of the magnetic steel block 20, and any other deformation manner that can effectively bond and fix the magnetic steel block 20 is within the scope of the present application.

Referring to fig. 1 to 3, the outer periphery of the rotor disk 30 in the present embodiment is provided with an annular flange 32, the annular flange 32 is embedded in the first end of the magnetic steel sleeve 10, and the first positioning ribs 31 are provided on the annular flange 32. During actual installation, the annular flange 32 is embedded at the first end of the magnetic steel sleeve 10, the two adjacent first positioning ribs 31 can enclose on the annular flange 32 to form a groove structure, and during installation, one end of the magnetic steel block 20 is embedded in the groove structure, so that the end part of the magnetic steel block 20 is effectively limited.

Alternatively, the annular flange 32 and the magnetic steel sleeve 10 in the present application may be connected by at least one of bonding, welding or locking member 60, which is simple in structure and convenient for installation. The drawings in this embodiment show the case of connection using the locking member 60, and the locking member 60 may be, for example, a locking screw, a locking pin, or a locking bolt.

Further, the annular main body 41 of the magnetic steel fixing ring 40 in the embodiment is connected with the magnetic steel sleeve 10 in an interference fit manner, so that the structure is simple, and the disassembly and the assembly are convenient. Of course, in other embodiments of the present application, the magnetic steel fixing ring 40 may be fixed on the magnetic steel sleeve 10 by a screw, a pin, welding, bonding, or clamping.

Referring to fig. 3 to 4, the rotor turntable 30 in this embodiment includes a first disk body 33 and a second disk body 34 which are stacked, a plurality of supporting ribs 35 are provided between the first disk body 33 and the second disk body 34, the plurality of supporting ribs 35 are arranged along the rib direction of the rotor turntable 30 at intervals, and a heat dissipation hole 36 is formed between two adjacent supporting ribs 35 in a surrounding manner, so that heat dissipation is conveniently performed on the rotor turntable 30, and when the magnetic steel fixing assembly is installed in an outer rotor motor, the stability of the outer rotor motor in the running process can be improved.

On the other hand, the embodiment of the application also provides an outer rotor motor, which is the magnetic steel fixing component in the embodiment. Therefore, the outer rotor motor includes all the technical effects of the magnetic steel fixing assembly in the above embodiment, and since the technical effects of the magnetic steel fixing assembly have been described in detail, the description thereof is omitted herein.

According to the above structure, the technical scheme of the application has at least the following technical effects:

(1) Through the first location protruding muscle of circumference equipartition on the rotor carousel, the realization that need not frock just can be convenient magnetic steel piece evenly paste.

(2) The annular glue groove on the inner wall of the magnetic steel sleeve is used for gluing the magnetic steel blocks, so that glue is saved, the gluing is reliable and uniform, and the magnetic steel sleeve is attractive.

(3) The magnetic steel is fixed reliably through the first positioning convex ribs uniformly distributed on the circumference of the rotor turntable and the magnetic steel fixing ring at the other end.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A magnetic steel fixing assembly, comprising:

the magnetic steel sleeve (10), the inner wall surface of the magnetic steel sleeve (10) is provided with a rubber groove (11);

the magnetic steel blocks (20), wherein the magnetic steel blocks (20) are a plurality of blocks, the magnetic steel blocks (20) are arranged at intervals along the circumferential direction of the inner wall surface of the magnetic steel sleeve (10), and are adhered to the inner wall of the magnetic steel sleeve (10) through glue filled in the glue groove (11), and a positioning gap (50) is formed between two adjacent magnetic steel blocks (20);

the rotor turntable (30), the rotor turntable (30) is covered at the first end of the magnetic steel sleeve (10), a plurality of first positioning ribs (31) are arranged on the circumference of the rotor turntable (30), and the first positioning ribs (31) are inserted in the positioning gaps (50) in a one-to-one correspondence manner;

the magnetic steel fixing ring (40), the magnetic steel fixing ring (40) set up in the second end of magnetic steel sleeve (10), magnetic steel fixing ring (40) include annular main part (41) and a plurality of second location protruding muscle (42), and is a plurality of second location protruding muscle (42) are followed the circumference interval setting of annular main part (41), second location protruding muscle (42) one-to-one inserts and establishes in location clearance (50).

2. The magnetic steel fixing assembly according to claim 1, wherein the glue groove (11) is an annular groove, and the annular groove is arranged along the circumferential direction of the inner wall surface of the magnetic steel sleeve (10).

3. The magnetic steel fixing assembly according to claim 2, wherein the number of the annular grooves is plural, and the plurality of the annular grooves are arranged at intervals along the axial direction of the magnetic steel sleeve (10).

4. A magnetic steel fixing assembly according to claim 3, wherein a plurality of said annular grooves are arranged at least at both ends and at the middle in the longitudinal direction of said magnetic steel block (20).

5. The magnetic steel fixing assembly according to claim 1, wherein an annular flange (32) is arranged on the periphery of the rotor turntable (30), the annular flange (32) is embedded at the first end of the magnetic steel sleeve (10), and the first positioning ribs (31) are arranged on the annular flange (32).

6. The magnetic steel fixing assembly according to claim 5, wherein the annular flange (32) and the magnetic steel sleeve (10) are connected by at least one of bonding, welding or locking members (60).

7. The magnetic steel fixing assembly according to claim 5, wherein the annular flange (32) and the magnetic steel fixing ring (40) are fixedly connected through locking screws.

8. The magnetic steel fixing assembly according to claim 1, wherein the rotor turntable (30) comprises a first disc body (33) and a second disc body (34) which are stacked, a plurality of supporting ribs (35) are arranged between the first disc body (33) and the second disc body (34), the plurality of supporting ribs (35) are radial along the radial direction of the rotor turntable (30), and a heat dissipation hole (36) is formed between every two adjacent supporting ribs (35) in a surrounding mode.

9. The magnetic steel fixing assembly according to claim 1, wherein the annular main body (41) is embedded at the second end of the magnetic steel sleeve (10) in an interference fit manner.

10. An external rotor motor, characterized in that the external rotor motor is the magnetic steel fixing assembly of any one of claims 1 to 9.