CN210927257U - Plastic package motor - Google Patents
Plastic package motor Download PDFInfo
- Publication number
- CN210927257U CN210927257U CN201921471496.5U CN201921471496U CN210927257U CN 210927257 U CN210927257 U CN 210927257U CN 201921471496 U CN201921471496 U CN 201921471496U CN 210927257 U CN210927257 U CN 210927257U
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- stator core
- rear end
- conductor
- end cover
- plastic package
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Abstract
The utility model provides a plastic envelope motor, this motor include stator core, the front end housing of being connected with the stator core electricity and the rear end cap of being connected with the stator core electricity. The utility model discloses utilize electrically conductive stator core with preceding, rear end cap short circuit to prevent that the bearing from taking place the galvanic corrosion, and utilize the stator core of motor itself to carry out the short circuit to preceding, rear end cap, reduced the use amount of the preceding, required conductor of rear end cap of short circuit. The utility model discloses do not adopt insulating bearing, also need not handle the pivot bearing surface of revolution, reduced the motor cost.
Description
Technical Field
The utility model relates to the technical field of electric machines, especially, relate to a plastic envelope motor.
Background
The direct current motor is generally driven by using Pulse Width Modulation (PWM), so that a potential difference is generated between the inner ring and the outer ring of the bearing, lubricating oil in the bearing is broken down, and a small current flows from the inner ring to the outer ring of the bearing, so that the performance and the service life of the bearing are rapidly shortened, and an electric corrosion phenomenon is generated. Direct current motors are generally plastic package motors, plastic package housings formed by injection molding of the plastic package motors between front and rear end covers are non-conductive, and at present, two theoretical schemes are provided for solving the problem of bearing galvanic corrosion: 1. reducing the generation of shaft current. 2. Shaft currents are avoided from passing through the bearings.
There are several ways of preventing galvanic corrosion on the market today, but each has its own drawbacks.
1. The motor adopts a mode that the conductive adhesive tape is connected with the front end cover and the rear end cover. The conductive adhesive tape is exposed on the surface of the motor, is easily influenced by external factors, and is easy to lose efficacy, and for most end covers, insulating substances such as an oxidation layer and the like are arranged on the surface, so that the electric corrosion prevention effect is not remarkable.
2. The method is realized by adopting a ceramic insulation bearing method, but the cost of the ceramic bearing is too high, so that the cost of the motor is too high, and the price of the motor is high.
3. Plating insulating material in the bearing chamber: the method cannot meet the matching precision of the bearing and the bearing chamber. The bearing and the bearing chamber have too large fit clearance, and the service life of the bearing is reduced when the bearing runs at high speed.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem that the bearing takes place the galvanic corrosion among the prior art, the utility model provides a plastic envelope motor, concrete scheme is as follows:
a plastic package motor comprises a stator core, a front end cover and a rear end cover;
the stator core is electrically connected with the front end cover and the rear end cover respectively.
Furthermore, the stator core further comprises a first conductor, and the first conductor is electrically connected with the front end cover and the stator core respectively.
Further, the first conductor is a metal conducting strip.
Further, the rear end cover is in direct contact with the stator core.
Further, the rear end cover is electrically connected with the stator core through interference fit.
Furthermore, the stator core further comprises a second conductor, and the second conductor is electrically connected with the rear end cover and the stator core respectively.
Furthermore, the matching relationship between the rear end cover and the stator core is clearance fit.
Further, the second conductor is disposed on the rear end cover, and the second conductor has elasticity in a direction toward the stator core.
Further, the second conductor is a metal spring conducting strip.
Further, the second conductor is detachably connected with the rear end cover.
Compared with the prior art, the utility model provides a plastic envelope motor, this motor include stator core, the front end housing of being connected with the stator core electricity and the rear end cap of being connected with the stator core electricity. The utility model discloses utilize electrically conductive stator core with preceding, rear end cap short circuit to prevent that the bearing from taking place the galvanic corrosion, and utilize the stator core of motor itself to carry out the short circuit to preceding, rear end cap, reduced the use amount of the preceding, required conductor of rear end cap of short circuit. The utility model discloses do not adopt insulating bearing, also need not handle (plate insulating material) the bearing rotating surface, reduced motor cost.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a perspective view of a metal conductive sheet as a first conductor in an embodiment of the present invention electrically connected to a front end cover and a stator core, respectively;
fig. 2 is a perspective view of a rear end cap and a metal spring conductive plate as a second conductor mounted on the rear end cap in an embodiment of the present invention;
fig. 3 is a perspective view of the plastic package housing formed by injection molding after the first conductor is electrically connected to the front end cover and the stator core respectively in the embodiment of the present invention;
fig. 4 is an exploded schematic view of an assembly drawing of a plastic package motor according to an embodiment of the present invention.
In the drawings, like reference numerals are used for like reference numerals, and the drawings are not drawn to scale.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 to 4, the present embodiment provides a plastic package motor, which includes a stator core 2, a front end cover 3, and a rear end cover 4; the stator core 2 is electrically connected with the front end cover 3 and the rear end cover 4 respectively.
The plastic package motor of this embodiment utilizes electrically conductive stator core 2 to take place the short circuit with front end housing 3 and rear end cap 4 to prevent that the bearing from taking place the galvanic corrosion, and utilize the stator core 2 of motor itself to carry out the short circuit to front end housing 3 and rear end cap 4, reduced the use amount of short circuit front end housing 3 and the required conductor of rear end cap 4. The utility model discloses do not adopt insulating bearing, also need not handle (plate insulating material) the bearing rotating surface, reduced motor cost.
The plastic package motor of this embodiment further includes a first conductor 1, the first conductor 1 respectively with the front end housing 3 and the stator core 2 is electrically connected. The front end cover 3 is electrically connected to the stator core 2 by this structure. The first conductor 1 is preferably a metallic conductive sheet. One end of the first conductor 1 may be fixed to the front end cover 3 by riveting, welding, or screwing to electrically connect the first conductor 1 to the front end cover 3, and the other end of the first conductor 1 may be fixed to the stator core 2 by tapping screw, riveting, or screwing to electrically connect the first conductor 1 to the stator core 2.
After the first conductor 1 is electrically connected with the front end cover 3 and the stator core 2, the first conductor 1 is respectively injection-molded with the front end cover 3 and a component formed by electrically connecting the stator core 2, so that a plastic package shell 6 shown in fig. 3 and 4 is formed, and the plastic package shell 6 is located between the front end cover 3 and the rear end cover 4 and is not conductive.
The plastic package motor of this embodiment further includes a second conductor 5, and the second conductor 5 is respectively electrically connected to the rear end cover 4 and the stator core 2. This structure realizes the electric connection of rear end cap 4 and stator core 2.
In order to facilitate the operation of production staff, the matching relation between the rear end cover 4 and the stator core 2 is in clearance fit, when the matching relation between the rear end cover 4 and the stator core 2 is in clearance fit, the stator core 2 cannot be directly contacted with the rear end cover 4, and a second conductor 5 can be respectively electrically connected with the rear end cover 4 and the stator core 2. The second conductor 5 is preferably a metal spring conductive sheet, and the metal spring conductive sheet as the second conductor 5 is arranged on the rear end cover 4 to realize the electrical connection of the second conductor 5 and the rear end cover 4, so that the second conductor 5 and the rear end cover 4 can be detachably connected, for example, the second conductor 5 is detachably connected on the rear end cover 4 at a preset position through a threaded connection or a clamping groove connection. The metal spring conductive plate as the second conductor 5 has elasticity in a direction toward the stator core 2, and as shown in fig. 2 and 4, the metal spring conductive plate as the second conductor 5 slightly tilts in a direction toward the stator core 2, and during assembly, the stator core 2 presses the metal spring conductive plate as the tilt of the second conductor 5, thereby achieving electrical connection between the stator core 2 and the second conductor 5.
In this embodiment, the path through which the front end cover 3 and the rear end cover 4 are conducted is: a front end cover 3-a first conductor 1-a stator core 2-a second conductor 5-a rear end cover 4.
In the embodiment, the first conductor 1 and the second conductor 5 are both positioned in the motor, so that the problem that the electric connection fails or the electric corrosion preventing effect is not obvious due to the influence of external factors on the first conductor 1 and the second conductor 5 is solved.
Example two:
the present embodiment is different from the first embodiment in the way of achieving the electrical connection between the rear end cover 4 and the stator core 2. The rest is the same as the first embodiment.
In this embodiment, the rear end cover 4 is in direct contact with the stator core 2, and the rear end cover 4 is in direct contact with the stator core 2 to achieve electrical connection therebetween. Preferably, the rear end cover 4 directly contacts with the stator core 2 to form an interference fit, and the rear end cover 4 and the stator core 2 are electrically connected through the interference fit.
In this embodiment, since the rear end cover 4 is in direct contact with the stator core 2 to realize electrical connection, the second conductor 5 electrically connected to the rear end cover 4 and the stator core 2 may not be provided.
In this embodiment, the path through which the front end cover 3 and the rear end cover 4 are conducted is: a front end cover 3-a first conductor 1-a stator core 2-a rear end cover 4.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for portions or all of the features thereof without departing from the scope of the invention. In particular, the various features mentioned in the various embodiments may be combined in any combination as long as there is no logical or structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A plastic package motor is characterized by comprising a stator core, a front end cover and a rear end cover;
the stator core is electrically connected with the front end cover and the rear end cover respectively.
2. The plastic package motor according to claim 1, further comprising a first conductor electrically connected to the front end cap and the stator core, respectively.
3. The plastic package motor of claim 2, wherein the first conductor is a metal conducting strip.
4. The plastic package motor according to any one of claims 1-3, wherein the back end cap is in direct contact with the stator core.
5. The plastic package motor according to claim 4, wherein the rear end cap is electrically connected with the stator core through interference fit.
6. The plastic package motor according to any one of claims 1-3, further comprising a second conductor electrically connected to the back end cap and the stator core, respectively.
7. The plastic package motor according to claim 6, wherein the back end cap is in clearance fit with the stator core.
8. The plastic package motor of claim 7, wherein the second conductor is disposed on the back end cap, and the second conductor is elastic in a direction toward the stator core.
9. The plastic package motor of claim 8, wherein the second conductor is a metal spring conducting strip.
10. The plastic package motor of claim 8, wherein the second conductor is detachably connected to the back end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471496.5U CN210927257U (en) | 2019-09-05 | 2019-09-05 | Plastic package motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921471496.5U CN210927257U (en) | 2019-09-05 | 2019-09-05 | Plastic package motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210927257U true CN210927257U (en) | 2020-07-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921471496.5U Active CN210927257U (en) | 2019-09-05 | 2019-09-05 | Plastic package motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210927257U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114025600A (en) * | 2021-11-08 | 2022-02-08 | 南昌三瑞智能科技有限公司 | Electromagnetic shielding rotating part conductive lap joint module of power motor of unmanned aerial vehicle |
-
2019
- 2019-09-05 CN CN201921471496.5U patent/CN210927257U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114025600A (en) * | 2021-11-08 | 2022-02-08 | 南昌三瑞智能科技有限公司 | Electromagnetic shielding rotating part conductive lap joint module of power motor of unmanned aerial vehicle |
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