CN219513872U

CN219513872U - Outer rotor motor

Info

Publication number: CN219513872U
Application number: CN202320602652.7U
Authority: CN
Inventors: 李建青
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-08-11
Anticipated expiration: 2033-03-24

Abstract

The utility model discloses an outer rotor motor, which comprises a rotating shaft extending along the axial direction, a motor bracket supported at one axial end of the rotating shaft and an end cover connected with the motor bracket, wherein the other axial end of the rotating shaft is supported in the end cover; the motor support comprises a base for supporting the rotating shaft, the base comprises an annular base main body, a plurality of first installation bosses and nuts, the first installation bosses are located on the outer circumference of the base main body, the nuts are integrally formed in the first installation bosses, the end cover is provided with an end cover shell sleeved on the outer circumference of the rotating shaft and a plurality of second installation bosses located on the outer circumference of the end cover shell, the second installation bosses are arranged corresponding to the first installation bosses, and the outer rotor motor penetrates through the second installation bosses through a bolt and is connected to the nuts in the first installation bosses. Solves the problems of difficult design, high material density, heavy weight of finished products and high cost of the aluminum bracket mold, and improves the production efficiency.

Description

Outer rotor motor

[ field of technology ]

The utility model relates to the technical field of motors, in particular to an outer rotor motor with good tightness.

[ background Art ]

The conventional external rotor motor includes a motor bracket made of aluminum alloy and a rear housing, and the motor bracket and the rear housing are fixedly connected by a plurality of screws. However, when the motor support is manufactured by using aluminum alloy, the defects of difficult mold design, high material density, heavy finished product weight and high cost are caused. And the motor support and the rear shell are fixedly connected through the screw, the tightness degree of assembly is not easy to control, if the screw is screwed too tightly, the surface of the motor support or the rear shell is easily worn, and the requirement of assembly tightness is not met if the screw is too loose.

Therefore, it is necessary to provide a novel outer rotor motor bracket and an outer rotor motor to overcome the defects of the prior art.

[ utility model ]

In order to overcome the defects in the prior art, the utility model aims to provide an outer rotor motor with good tightness, which is provided with an outer rotor motor bracket with light weight and convenient installation.

The utility model solves the problems in the prior art by adopting the following technical scheme: an outer rotor motor comprises a rotating shaft extending along the axial direction, a motor bracket supported at one axial end of the rotating shaft and an end cover connected with the motor bracket, wherein the other axial end of the rotating shaft is supported in the end cover; the motor support comprises a base for supporting the rotating shaft, the base comprises an annular base main body, a plurality of first installation bosses and nuts, the first installation bosses are located on the outer circumference of the base main body, the nuts are integrally formed in the first installation bosses, the end cover is provided with an end cover shell sleeved on the outer circumference of the rotating shaft and a plurality of second installation bosses located on the outer circumference of the end cover shell, the second installation bosses are arranged corresponding to the first installation bosses, and the outer rotor motor penetrates through the second installation bosses through a bolt and is connected to the nuts in the first installation bosses.

The further improvement scheme is as follows: the second installation boss is provided with a through hole penetrating along the axial direction, the first installation boss is provided with an installation hole corresponding to the through hole, the nut is accommodated in the installation hole, and the bolt penetrates through the through hole, extends into the installation hole and is connected with the nut.

The further improvement scheme is as follows: the outer rotor motor further comprises a plurality of gaskets arranged between the first installation boss and the second installation boss, the gaskets are arranged corresponding to the through holes and the installation holes, and the bolts sequentially penetrate through the through holes, the gaskets, the installation holes and the nuts.

The further improvement scheme is as follows: the base comprises a plurality of arc-shaped installation guide plates protruding from the outer circumference of the base main body along the axial direction towards the end cover, the installation guide plates are connected with the corresponding first installation bosses, and the closed patterns formed by the installation guide plates are circles overlapped with the outer circumference of the base main body.

The further improvement scheme is as follows: the installation guide piece comprises an outer ring with a first thickness and an inner ring with a second thickness, the first thickness is larger than the second thickness, the inner ring is higher than the first installation boss in the axial direction, a step surface is formed at the joint of the inner ring and the outer ring, and the step surface and the axial surface of the first installation boss are located on the same plane.

The further improvement scheme is as follows: the inner diameter of the end cover is the same as the outer diameter of the inner ring of the motor support, the inner ring of the motor support is embedded into the end cover and is attached to the inner surface of the end cover, and the step surface of the mounting guide piece of the motor support is in contact with the axial end surface of the end cover.

The further improvement scheme is as follows: the motor support is an integrally formed plastic piece.

The further improvement scheme is as follows: the outer rotor motor comprises an inner stator assembly accommodated in the end cover, the motor bracket comprises a supporting cylinder extending into the end cover along the axial direction from the base, and the inner stator assembly is fixed on the periphery of the supporting cylinder.

The further improvement scheme is as follows: the outer rotor motor comprises an outer rotor assembly connected to the rotating shaft, and the outer rotor assembly is located between the end cover and the inner stator assembly.

The further improvement scheme is as follows: the motor bracket further comprises a central through hole positioned at the center of the base body, the central through hole axially penetrates through the supporting cylinder, and the rotating shaft penetrates through the central through hole from one end of the base body and penetrates out from the other end of the supporting cylinder.

Compared with the prior art, the utility model has the following beneficial effects:

1. the motor bracket of the external rotor motor is an integrally injection molded plastic part, and solves the problems of difficult design, high manufacturing cost and heavy finished product weight of a motor bracket die made of aluminum alloy in the prior art; in addition, the motor bracket of the outer rotor motor directly fixes the nut in the mounting hole in the injection molding process, so that the nut is wrapped in the first mounting boss, and meanwhile, the step of additionally fixing the position of the nut is omitted, the assembly tightness is ensured, and the assembly efficiency is improved.

2. According to the outer rotor motor, the plurality of gaskets are added between the motor support and the end cover, and the torque generated when the motor support and the rear shell are locked is transferred to the gaskets, so that the tightness is ensured, and the surfaces of the motor support and the end cover are prevented from being worn in the assembly process.

[ description of the drawings ]

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:

fig. 1 is a perspective view of an external rotor motor according to a preferred embodiment of the present utility model;

FIG. 2 is an exploded view of the outer rotor motor of FIG. 1;

FIG. 3 is a cross-sectional view of the outer rotor motor shown in FIG. 1;

FIG. 4 is an enlarged view of a portion of the outer rotor motor of FIG. 1;

fig. 5 is a front view of a motor bracket according to a preferred embodiment of the present utility model;

FIG. 6 is an enlarged view of a portion of the motor mount shown in FIG. 5;

FIG. 7 is a schematic perspective view of the motor bracket of FIG. 5;

FIG. 8 is an enlarged view of a portion of the motor mount shown in FIG. 7;

meaning of reference numerals in the drawings:

100. outer rotor motor 10, motor bracket 11 and base

12. Support cylinder 13, central through hole 110, base body

120. First mounting boss 121, mounting hole 122, nut

130. Mounting guide piece 131, outer ring 132, inner ring

133. Step surface 20, rotating shaft 30 and outer rotor assembly

40. Inner stator assembly 50, end cap 51, end cap housing

52. Second mounting boss 53, through hole 60, spacer

[ detailed description ] of the utility model

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. In the description of the present specification, a particular feature, structure, material, or characteristic described may be combined in any suitable manner in one or more embodiments or examples.

The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Words such as "upper", "lower", "front", "rear", etc., indicating an azimuth or a positional relationship are based on only the azimuth or the positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus/elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Fig. 1 is a schematic perspective view of an external rotor motor 100 according to a preferred embodiment of the utility model. The outer rotor motor 100 includes a rotating shaft 20 extending in an axial direction, a motor bracket 10 supported at one axial end of the rotating shaft 20, and an end cover 50 connected to the motor bracket 10, and the other axial end of the rotating shaft 20 is supported in the end cover 50.

Referring to fig. 5 to 6, a front view of a motor bracket 10 according to a preferred embodiment of the present utility model is shown. The motor bracket 10 includes a base 11 for supporting the rotating shaft 20, the base 11 includes an annular base body 110, a plurality of first mounting bosses 120 located on an outer circumference of the base body 110, and nuts 122 integrally formed in the first mounting bosses 120.

Referring to fig. 2 to 3, the end cover 50 is provided with an end cover housing 51 sleeved on the outer periphery of the rotating shaft 20 and a plurality of second mounting bosses 52 located on the outer periphery of the end cover housing 51, the second mounting bosses 52 are disposed corresponding to the first mounting bosses 120, and the outer rotor motor 100 is connected to the nuts 122 in the first mounting bosses 120 after passing through the second mounting bosses 52 through a bolt.

The second mounting boss 52 is provided with a through hole 53 penetrating in the axial direction, the first mounting boss 120 is provided with a mounting hole 121 corresponding to the through hole 53, the nut 122 is accommodated in the mounting hole 121, and the bolt passes through the through hole 53, extends into the mounting hole 121 and is connected with the nut 122.

In order to solve the problem that in the prior art, the motor support and the rear housing are fixedly connected only by the screw, the tightness degree of assembly is not easy to control, the outer rotor motor 100 further comprises a plurality of gaskets 60 arranged between the first mounting boss 120 and the second mounting boss 52, the gaskets 60 are arranged corresponding to the through holes 53 and the mounting holes 121, and the bolts sequentially pass through the through holes 53, the gaskets 60, the mounting holes 121 and the nuts 122.

Referring to fig. 7, a perspective view of a motor bracket 10 according to a preferred embodiment of the utility model is shown. In order to ensure the correct connection when the motor bracket 10 is fixedly connected with the end cover 50, the base 11 includes a plurality of arc-shaped mounting guide pieces 130 protruding from the outer circumference of the base body 110 toward the end cover 50 along the axial direction, the mounting guide pieces 130 are connected with the corresponding first mounting bosses 120, and the closed pattern formed by the mounting guide pieces 130 is a circle overlapping with the outer circumference of the base body 110.

Referring to fig. 8, a schematic perspective view of a motor bracket 10 according to a preferred embodiment of the utility model is shown in an enlarged partial view. In order to further secure the fastening of the assembly, the mounting guide 130 includes an outer ring 131 having a first thickness and an inner ring 132 having a second thickness, the first thickness being greater than the second thickness, the inner ring 132 being axially higher than the first mounting boss 120, a step surface 133 being formed at a junction of the inner ring 132 and the outer ring 131, the step surface 133 being on the same plane as an axial surface of the first mounting boss 120.

Fig. 4 is a partially enlarged perspective view of an external rotor motor 100 according to a preferred embodiment of the utility model. The inner diameter of the end cover 50 is the same as the outer diameter of the inner ring 132 of the motor bracket 10, the inner ring 132 of the motor bracket 10 is embedded in the end cover 50 and is attached to the inner surface of the end cover 50, and the step surface 133 of the mounting guide piece 130 of the motor bracket 10 is in contact with the axial end surface of the end cover 50.

The outer rotor motor 100 includes an inner stator assembly 40 received in the end cap 50, the motor bracket 10 includes a support cylinder 12 axially extended from the base 11 into the end cap 50, and the inner stator assembly 40 is fixed to an outer circumference of the support cylinder 12.

The outer rotor motor 100 includes an outer rotor assembly 30 coupled to the rotation shaft 20, the outer rotor assembly 30 being positioned between the end cap 50 and the inner stator assembly 40.

The motor bracket 10 further includes a central through hole 13 located at the center of the base body 110, the central through hole 13 axially penetrates through the support cylinder 12, and the rotating shaft 20 penetrates through the central through hole 13 from one end of the base body 110 and penetrates out from the other end of the support cylinder 12.

In order to solve the problems of difficult design, high manufacturing cost and heavy finished product weight of the motor bracket die made of aluminum alloy in the prior art, the motor bracket 10 is an integrally formed plastic piece.

The present utility model is not limited to the above-described embodiments, and those skilled in the art will readily appreciate that many other alternatives are possible for the outer rotor motor of the present utility model without departing from the spirit and scope of the present utility model, which is set forth in the following claims.

Claims

1. An outer rotor motor comprises a rotating shaft extending along the axial direction, a motor bracket supported at one axial end of the rotating shaft and an end cover connected with the motor bracket, wherein the other axial end of the rotating shaft is supported in the end cover; the method is characterized in that: the motor support comprises a base for supporting the rotating shaft, the base comprises an annular base main body, a plurality of first installation bosses and nuts, the first installation bosses are located on the outer circumference of the base main body, the nuts are integrally formed in the first installation bosses, the end cover is provided with an end cover shell sleeved on the outer circumference of the rotating shaft and a plurality of second installation bosses located on the outer circumference of the end cover shell, the second installation bosses are arranged corresponding to the first installation bosses, and the outer rotor motor penetrates through the second installation bosses through a bolt and is connected to the nuts in the first installation bosses.

2. The external rotor motor of claim 1, wherein: the second installation boss is provided with a through hole penetrating along the axial direction, the first installation boss is provided with an installation hole corresponding to the through hole, the nut is accommodated in the installation hole, and the bolt penetrates through the through hole, extends into the installation hole and is connected with the nut.

3. The external rotor motor according to claim 2, wherein: the outer rotor motor further comprises a plurality of gaskets arranged between the first installation boss and the second installation boss, the gaskets are arranged corresponding to the through holes and the installation holes, and the bolts sequentially penetrate through the through holes, the gaskets, the installation holes and the nuts.

4. The external rotor motor of claim 1, wherein: the base comprises a plurality of arc-shaped installation guide plates protruding from the outer circumference of the base main body along the axial direction towards the end cover, the installation guide plates are connected with the corresponding first installation bosses, and the closed patterns formed by the installation guide plates are circles overlapped with the outer circumference of the base main body.

5. The external rotor motor of claim 4, wherein: the installation guide piece comprises an outer ring with a first thickness and an inner ring with a second thickness, the first thickness is larger than the second thickness, the inner ring is higher than the first installation boss in the axial direction, a step surface is formed at the joint of the inner ring and the outer ring, and the step surface and the axial surface of the first installation boss are located on the same plane.

6. The external rotor motor of claim 5, wherein: the inner diameter of the end cover is the same as the outer diameter of the inner ring of the motor support, the inner ring of the motor support is embedded into the end cover and is attached to the inner surface of the end cover, and the step surface of the mounting guide piece of the motor support is in contact with the axial end surface of the end cover.

7. The external rotor motor of claim 1, wherein: the motor support is an integrally formed plastic piece.

8. The external rotor motor of claim 1, wherein: the outer rotor motor comprises an inner stator assembly accommodated in the end cover, the motor bracket comprises a supporting cylinder extending into the end cover along the axial direction from the base, and the inner stator assembly is fixed on the periphery of the supporting cylinder.

9. The external rotor motor of claim 8, wherein: the outer rotor motor comprises an outer rotor assembly connected to the rotating shaft, and the outer rotor assembly is located between the end cover and the inner stator assembly.

10. The external rotor motor of claim 8, wherein: the motor bracket further comprises a central through hole positioned at the center of the base body, the central through hole axially penetrates through the supporting cylinder, and the rotating shaft penetrates through the central through hole from one end of the base body and penetrates out from the other end of the supporting cylinder.