CN209948925U

CN209948925U - Brush motor

Info

Publication number: CN209948925U
Application number: CN201921204558.6U
Authority: CN
Inventors: 刘胜武; 卢友浪; 徐文珍; 颜君; 黄春结; 刘检荣; 陈红岩; 叶彬; 肖磊; 陈亚
Original assignee: XIAMEN DAZHEN MOTOR CO Ltd
Current assignee: XIAMEN DAZHEN MOTOR CO Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-01-14
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a brush motor, it includes motor casing, magnetic ring, rotor subassembly and closing cap, the motor casing is cylindric structure, and it has an upper end open-ended installation cavity, the upper end of motor casing is equipped with a plurality of riveting portion, the motor casing is formed with a step portion in the inner wall of open end, the inner wall of motor casing is formed with a plurality of archs, the magnetic ring is located in the installation cavity, just the outer wall and the protruding inseparable cooperation of magnetic ring, the rotor subassembly is located in the installation cavity, and be located the centre of magnetic ring, the closing cap install in on the step portion, and pass through riveting portion is fixed in the upper end of motor casing. The utility model discloses an installation intracavity is located to the magnetic ring to closely cooperate with the arch on the motor casing inner wall to realize fixing, overcome the not environmental protection that uses the fixed magnetic ring of adhesive to exist, the magnetic ring averts and drops, the adhesive ages and makes the magnetic ring not hard up etc. disadvantage, simultaneously, reduced the manufacturing cost of motor.

Description

Brush motor

Technical Field

The utility model relates to the technical field of motors, concretely relates to brush motor.

Background

Most of magnetic rings forming a stator in the existing motor are fixed in a motor shell by adopting an adhesive, and the mode of fixing the magnetic rings has a plurality of defects, such as: the uneven coating of the adhesive between the magnetic ring and the shell can easily cause the magnetic ring to shift and even fall off, and directly causes the performance reduction of the motor; after long-time use, the adhesive is aged to loosen the magnetic ring, so that the normal use of the motor is influenced; the use of adhesives is also not environmentally friendly, etc. Meanwhile, the raw materials are consumed for coating the adhesive, more working hours are consumed, and the mounting efficiency of the end cover is low, which increase the production cost of the motor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a brush motor, it has overcome the defect that uses the fixed magnetic ring of adhesive to exist, has reduced the manufacturing cost of motor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a brush motor comprises a motor shell, a magnetic ring, a rotor assembly and a sealing cover, wherein the motor shell is of a cylindrical structure and is provided with an installation cavity with an upper end opening, a plurality of riveting portions are arranged at the upper end of the motor shell, a step portion is formed on the inner wall of the opening end of the motor shell, a plurality of protrusions are formed on the inner wall of the motor shell, the magnetic ring is arranged in the installation cavity, the outer wall of the magnetic ring is tightly matched with the protrusions, the rotor assembly is arranged in the installation cavity and is located in the middle of the magnetic ring, and the sealing cover is arranged on the step portion and is fixed at the upper end of the motor shell through the riveting portions.

Furthermore, the protrusion is formed by inward sinking of the outer wall of the motor casing, so that the magnetic ring and the protrusion are in interference fit.

Further, the number of the protrusions is at least three, and the protrusions are arranged at equal angles along the circumferential direction of the motor casing.

Furthermore, the bottom of the motor casing is convexly extended towards the direction of the installation cavity to form a first positioning part, the bottom of the magnetic ring is provided with a first positioning hole, and the first positioning hole is matched with the first positioning part.

Furthermore, the number of the first positioning openings and the number of the first positioning parts are two, and the two are symmetrically arranged.

Further, the upper end of motor casing is equipped with second location mouth, the side of closing cap is formed with second location portion, second location portion and second location mouthful looks adaptation.

Further, the number of the riveting portions is at least three, and the riveting portions are arranged at equal intervals along the upper end of the motor casing.

After the technical scheme is adopted, compared with the background art, the utility model, have following advantage:

the utility model discloses an installation intracavity is located to the magnetic ring to closely cooperate with the arch on the motor casing inner wall to realize fixedly, overcome the not environmental protection that uses the fixed magnetic ring of adhesive to exist, the magnetic ring averts and drops, the adhesive ages and makes the magnetic ring not hard up and wait the disadvantage, simultaneously, need not consume adhesive raw materials and more man-hours, and the closing cap is installed in the upper end that the motor casing was fixed in through riveting portion behind the step portion, the installation effectiveness of closing cap is high, consequently, the manufacturing cost of motor has been reduced.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

fig. 3 is a schematic structural view of the motor case.

Description of reference numerals:

100. the motor comprises a motor shell, a mounting cavity, a riveting part, a step part, a protrusion 140, a first positioning part 150, a second positioning hole 160, a riveting part 120, a step part 140, and a second positioning hole;

200. a magnetic ring 210, a first positioning port;

300. a rotor assembly;

400. and a cover 410, a second positioning part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, and are only for convenience of description and simplification of the present invention, but do not indicate or imply that the device or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.

Examples

As shown in fig. 1 to fig. 3, the present invention discloses a brush motor, which includes a motor housing 100, a magnetic ring 200, a rotor assembly 300, and a sealing cover 400.

The motor casing 100 has a cylindrical structure and has an installation cavity 110 with an open upper end, the upper end of the motor casing 100 is provided with a plurality of riveting parts 120, a step part 130 is formed on the inner wall of the open end of the motor casing 100, and a plurality of protrusions 140 are formed on the inner wall of the motor casing 100.

The magnetic ring 200 is disposed in the mounting cavity 110, and the outer wall of the magnetic ring 200 is tightly fitted with the protrusions 140, in this embodiment, the protrusions 140 are formed by inward recessing of the outer wall of the motor casing 100, so that the magnetic ring 200 and the protrusions 140 are in interference fit, the number of the protrusions 140 is at least three, and the protrusions 140 are arranged at equal angles along the circumferential direction of the motor casing 100, thereby ensuring that the magnetic ring 200 and the protrusions 140 are not loosened, and the fit is more reliable.

The bottom of the motor casing 100 protrudes toward the mounting cavity 110 to form a first positioning portion 150, the bottom of the magnetic ring 200 forms a first positioning opening 210, and the first positioning opening 210 is matched with the first positioning portion 150. In this embodiment, the number of the first positioning openings 210 and the number of the first positioning portions 150 are two, and the magnetic ring 200 is further ensured not to be easily loosened or displaced by the cooperation of the first positioning openings 210 and the first positioning portions 150.

The rotor assembly 300 is arranged in the installation cavity 110 and located in the middle of the magnetic ring 200, the magnetic ring 200 and the protrusion 140 are in interference fit without displacement or looseness, the magnetic ring 200 serving as a stator and the rotor assembly 300 can stably work, and the performance of the motor is ensured. In the present invention, the rotor assembly 300 adopts a rotor structure of a brush motor in the prior art, such as a rotor, a crankshaft, a coil winding, and the like.

The cover 400 is mounted on the stepped portion 130 and fixed to the upper end of the motor case 100 by the caulking portion 120. The upper end of the motor casing 100 is provided with a second positioning opening 160, a second positioning portion 410 is formed on the side edge of the cover 400, and the second positioning portion 410 is matched with the second positioning opening 160. In the present embodiment, the number of the caulking portions 120 is at least three, and they are disposed at equal intervals along the upper end of the motor case 100. After the sealing cover 400 is positioned by the second positioning portion 410 and the second positioning opening 160, the riveting portion 120 and the sealing cover 400 are pressed together, so that the fixing efficiency is high, and the fixing effect is good.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A brush motor, its characterized in that: the motor casing is of a cylindrical structure and is provided with an installation cavity with an opening at the upper end, a plurality of riveting portions are arranged at the upper end of the motor casing, a step portion is formed on the inner wall of the opening end of the motor casing, a plurality of protrusions are formed on the inner wall of the motor casing, the magnetic ring is arranged in the installation cavity, the outer wall of the magnetic ring is tightly matched with the protrusions, the rotor assembly is arranged in the installation cavity and located in the middle of the magnetic ring, and the sealing cover is arranged on the step portion and is fixed at the upper end of the motor casing through the riveting portions.

2. A brush motor according to claim 1, wherein: the protrusions are formed by inward sinking of the outer wall of the motor shell, and the magnetic ring is in interference fit with the protrusions.

3. A brush motor according to claim 2, wherein: the number of the protrusions is at least three, and the protrusions are arranged at equal angles along the circumferential direction of the motor shell.

4. A brush motor according to claim 1, wherein: the bottom of the motor casing stretches towards the installation cavity to form a first positioning portion, the bottom of the magnetic ring is provided with a first positioning opening, and the first positioning opening is matched with the first positioning portion.

5. A brush motor according to claim 4, wherein: the number of the first positioning openings and the number of the first positioning parts are two, and the two positioning openings and the two positioning parts are symmetrically arranged.

6. A brush motor according to claim 1, wherein: the upper end of the motor casing is provided with a second positioning opening, a second positioning part is formed on the side edge of the sealing cover, and the second positioning part is matched with the second positioning opening.

7. A brush motor according to claim 1, wherein: the riveting portions are at least three in number and are arranged at equal intervals along the upper end of the motor shell.