CN202797566U - Commutator and direct current motor thereof - Google Patents
Commutator and direct current motor thereof Download PDFInfo
- Publication number
- CN202797566U CN202797566U CN 201220390972 CN201220390972U CN202797566U CN 202797566 U CN202797566 U CN 202797566U CN 201220390972 CN201220390972 CN 201220390972 CN 201220390972 U CN201220390972 U CN 201220390972U CN 202797566 U CN202797566 U CN 202797566U
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- Prior art keywords
- commutator
- bearing
- support body
- direct current
- oil
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Abstract
The utility model discloses a commutator, which is arranged in a direct current motor and is adjacent to a bearing in the direct current motor, and comprises a cylindrical insulating support and at least one metallic conductor which is arranged in a manner of surrounding around the outer wall of the insulating support, wherein an insulating barrier part is additionally arranged at an end of the insulating support connected with the bearing; and an oil collecting groove is arranged at the inner side of the insulating barrier part. According to the commutator discloses by the utility model, the problem of affecting the motor operation due to a short circuit in case that carbon powder on a bearing oil mixing carbon brush flows between the metallic conductors is avoided by the insulating barrier part arranged on the joint of the metallic conductor and the motor bearing; by the oil collecting groove at the inner side of the insulating barrier part, a metal anti-oil meson is not used, so a phenomenon of high-voltage electrical leakage due to metallic conductor carbon powder accumulation of the metal anti-oil meson and the commutator is avoided. Furthermore, the utility model discloses a direct current motor.
Description
Technical field
The utility model relates to the permanent magnet DC motor field, especially relates to the commutator and the direct current machine thereof that are applicable in the permanent magnet DC motor.
Background technology
Permanent magnet DC motor generally includes brushgear and commutator, is used for delivered current to the winding of motor rotor.And motor rotor is usually by bearings.Can not be sealed and use bearing bearing oil can occur.Through after the long operation, because the pressure between high-temperature expansion and rotor and the bearing, bearing oil is along rotor seepage outward at motor.And the most close bearing of commutator, stretch the easily surface contamination commutator of whole commutator of the oil that is therefore overflowed by bearing mixes with the carbon powder of carbon brush on the brushgear again, is deposited between the commutator segment, causes the commutator segment short circuit, affects machine operation.Bearing oil pollutes also can wear and tear too much commutator and carbon simultaneously, thereby affects the life-span of whole motor.
For addressing the above problem, Chinese publication number is that CN101309027B has disclosed a kind of motor, comprises an oil guard between commutator and bearing, is used for collecting the bearing oil that flows out from bearing.This oil guard is the grease proofing meson of a metal, and interference is assemblied in the rotating shaft of motor, can reduce bearing oil and flow to commutator surface by this device.But there is following problem in this oil guard: (1), because in use the grease proofing meson endoporus thermal coefficient of expansion poor from the circularity of rotating shaft and storeroom of metal is different, so that still understand the bearing oil inflow commutator surface of some.(2), because the external diameter of this grease proofing meson is the same large with the external diameter of commutator, even larger, owing to the carbon dust accumulation, so in use cause easily the high pressure leakage of electricity.(3), the motor after using a period of time, bearing oil still can flow to by the external diameter edge of this grease proofing meson the outer surface of commutator, still causes short circuit easily and affects machine operation.
The utility model content
The purpose of this utility model is to solve the shortcoming that outer surface that existing permanent magnet DC motor middle (center) bearing oil flows to commutator easily causes the commutator segment short circuit and uses the easy high pressure leakage of electricity of oil guard, and a kind of commutator is provided.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of commutator, place in the direct current machine, adjacent with the bearing in the described direct current machine, comprise that a columnar insulation support body and at least one are along the metallic conductor of this insulation support body outer wall around setting, link with described bearing on described insulation support body also is provided with an insulation barrier section, and described insulation barrier section inboard is provided with an oil trap.
Further, described insulation barrier section is a cylindrical structural, with described insulating supporting body by integral forming.
Further, the external diameter of described insulation barrier section is greater than the external diameter of described insulation support body.
Further, described oil trap is that circular recess and its diameter are greater than the internal diameter of described insulation support body.
Further, also be provided with the taper guiding surface of an outward opening along the inner wall edge of described oil trap.
Further, described insulation support body and described metallic conductor are one-body molded.
Further, be evenly distributed with five metallic conductors outside the described insulation support body.
A kind of direct current machine comprises above-mentioned commutator.
The beneficial effect of commutator provided by the utility model is:
At first, in the commutator structure provided by the utility model, an end that is connected with bearing at commutator is provided with an insulation barrier section.This insulation barrier section is cylindrical structural, and is consistent with the contour structures of commutator, therefore can be one-body molded, and convenient the manufacturing;
Then, at the head of metallic conductor because have more one section insulation barrier section, so that the oil that overflows on the bearing flows into the inboard of commutator insulation barrier section, can't flow on the metallic conductor, thereby avoid the carbon dust on the bearing oil mixing carbon brush to flow into the problem that causes short circuit between the metallic conductor;
At last, this insulation barrier section inboard is provided with an oil trap, can cast out the grease proofing meson of use metal after being provided with oil trap, thereby the metallic conductor carbon dust of having avoided the grease proofing meson of metal and commutator is piled up and is caused the situation of the high pressure leakage of electricity to occur, and whole supporter and insulation barrier section adopt the material bakelite of insulation to make, thereby can avoid bearing oil to flow to that metallic conductor may bring the commutator short circuit fully and the problem that affects machine operation.
The beneficial effect of direct current machine provided by the utility model is: direct current sub-motor provided by the utility model has adopted commutator provided by the utility model, can avoid carbon dust on the bearing oil mixing carbon brush to flow into causing the problem of short circuit between the metallic conductor and avoid the grease proofing meson of metal to contact with the metallic conductor of commutator and cause the situation appearance of the high pressure leakage of electricity.
Description of drawings
Fig. 1 is the structural representation of the commutator that provides of the utility model embodiment;
Fig. 2 is the complete section structural representation of the commutator that provides of the utility model embodiment;
Fig. 3 is the complete section structural representation of the permanent magnet DC motor that provides of the utility model embodiment;
Among the figure: the common grease proofing meson of space, 4-bearing, 5-rotating shaft, 6-of 1-commutator, 11-insulation support body, 111-commutator axis, 12-metallic conductor, 121-hook portion, 13-insulation barrier section, 131-oil trap, 132-guiding surface, 2-electric machine casing, 21-motor front end cover, 3-brushgear, 31-power supply terminal, 32-brushgear and insulation barrier section, 7-location meson, 8-permanent magnetic iron, 9-iron core.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Referring to Fig. 1-Fig. 2, be the structural representation of a kind of commutator provided by the utility model.A kind of commutator 1 places in the direct current machine, and is adjacent with bearing in the described direct current machine, comprise a columnar insulation support body 11 and at least one along these insulation support body 11 outer walls around arrange metallic conductor 12.Particularly, in the utility model, the link with described bearing on described insulation support body 11 also is provided with an insulation barrier section 13, and described insulation barrier section 13 inboards are provided with an oil trap 131.Commutator 1 provided by the utility model is applicable in all permanent magnet DC motors, for example electronic parking system of automobile dynamic system motor (choke valve, air flap driver, scheme for exhaust gas circulation system and turbocharger) and automobile etc.This insulation barrier section 13 has intercepted the bearing oil in the motor fully and has flowed on the metallic conductor 12 on commutator 1 surface, thereby can avoid causing metallic conductor 12 short circuits because piling up the carbon powder of bearing oil and brush on the metallic conductor 12, affects machine operation.Need not to use the grease proofing meson of metal after being provided with oil trap 131, thereby avoided the grease proofing meson of metal to contact with the metallic conductor 12 of commutator 1 and cause the situation of the high pressure leakage of electricity to occur.
Further, referring to Fig. 2, described insulation barrier section 13 is a cylindrical structural, and is one-body molded with described insulation support body 11.In the utility model, insulation support body 11 all adopts the bakelite material to make with insulation barrier section 13, and insulation barrier section 13 is cylindrical structural, and is consistent with the columnar contour structures of insulation support body 11, therefore the insulated part of this commutator 1 is integrated injection molding, the convenient manufacturing.
Particularly, the external diameter of described insulation barrier section 13 is greater than the external diameter of described insulation support body 11.Because the external diameter of insulation barrier section 13 is greater than the external diameter of insulation support body 11, when commutator 1 is assemblied in the motor, the oil that carbon brush on the brushgear of motor overflows from bearing with the metallic conductor contact fully flows into the inboard of commutator 1 insulation barrier section 13, can't flow on the metallic conductor 12, thereby avoid the carbon dust on the bearing oil mixing carbon brush to flow into the problem that causes short circuit between the metallic conductor 12.
Further, please again referring to Fig. 2, described oil trap 131 is that circular recess and its diameter are greater than the internal diameter of described insulation support body 11.So that when commutator 1 is sheathed in the rotating shaft of motor, can form the oil trap of an annular in insulation barrier section 13 inboards.The bearing oil that overflows from bearing can be in rotating shaft flows into groove, the outside of as far as possible not overflowing commutator 1.Be provided with the taper guiding surface 132 of an outward opening along the inner wall edge of described oil trap 131.These taper guiding surface 132 openings can be with in the motor running towards the direction of bearing, and from the bearing oil that bearing flies to spill, water conservancy diversion as much as possible enters in the oil trap 131, avoids bearing oil to pollute commutator.
Further, one-body molded at insulation support body described in the utility model 11 and described metallic conductor 12.In the process of insulation support body 11 and 13 injection mouldings of insulation barrier section, with metallic conductor 12 evenly arrange with the insulating supporting external surface on integrated injection molding.Insulation support body 11 outsides are evenly distributed with five metallic conductors 12 in the utility model.Certainly, being not limited only to 5 metallic conductors, can be other numbers such as 3,4,6,7,8.
The utility model embodiment also provides a kind of direct current machine, comprises above-mentioned commutator 1.As shown in Figure 3, it is the direct current machine of having used commutator 1 provided by the utility model among the figure, comprise motor housing 2 in this motor, be interspersed in the rotating shaft 5 in the motor housing 2, be set around iron core 9 and permanent magnetic iron 8 in the rotating shaft 5, front end housing 21 on sheathed and the motor housing 2, be located in the front end housing 21 and be sheathed on bearing 4 in the rotating shaft 5, place the commutator provided by the utility model 1 between the bearing 4 and unshakable in one's determination 9 and a pair of brushgear 3 that is positioned at front end housing 21 that contacts with the metallic conductor 12 of commutator 1, this brushgear 3 is extended with a pair of power supply terminal 31.In a kind of direct current machine provided by the utility model, between commutator 1 and bearing 4, also be provided with location meson 7 and a common grease proofing meson 6.The external diameter of this common grease proofing meson 6 is less than the external diameter of the oil trap 13 of commutator 1 provided by the utility model, but greater than the external diameter that is used for the location meson 7 of distance between location commutator 1 and the bearing 4.This common grease proofing meson 6 can be so that the bearing oil that bearing 4 overflows when the common grease proofing meson 6, be subject to preliminary obstruct.And because the external diameter of common grease proofing meson is less than the external diameter of the insulation barrier section 13 of commutator 1, so that when motor operates, avoided the problem of the high pressure leakage of electricity.When the oil that overflows when bearing 4 surpasses the obstructing capacity of common grease proofing meson 6, bearing oil also can flow on the guiding surface 132 of commutator 1 along common grease proofing meson 6, guiding surface 132 by commutator 1 flows in the oil trap 131 of the utility model design, and is stored in wherein.The surface of avoiding bearing oil to flow into again commutator 1 causes commutator 1 short circuit and affects the motor normal operation.
Therefore adopted commutator 1 provided by the utility model, can avoid carbon dust on bearing oil the mixings carbon brush to flow into causing the problem of short circuit between the metallic conductor and avoid the grease proofing meson of metal to contact with the metallic conductor 12 of commutator 1 and cause the situation appearance of the high pressure leakage of electricity.
Below only be preferred embodiment of the present utility model, not in order to limiting the utility model, all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. commutator, place in the direct current machine, adjacent with the bearing in the described direct current machine, comprise that a columnar insulation support body and at least one are along the metallic conductor of this insulation support body outer wall around setting, it is characterized in that, link with described bearing on described insulation support body also is provided with an insulation barrier section, and described insulation barrier section inboard is provided with an oil trap.
2. commutator as claimed in claim 1 is characterized in that, described insulation barrier section is a cylindrical structural, with described insulating supporting body by integral forming.
3. commutator as claimed in claim 1 is characterized in that, the external diameter of described insulation barrier section is greater than the external diameter of described insulation support body.
4. commutator as claimed in claim 1 is characterized in that, described oil trap is that circular recess and its diameter are greater than the internal diameter of described insulation support body.
5. commutator as claimed in claim 4 is characterized in that, also is provided with the taper guiding surface of an outward opening along the inner wall edge of described oil trap.
6. commutator as claimed in claim 1 is characterized in that, described insulation support body and described metallic conductor are one-body molded.
7. commutator as claimed in claim 1 is characterized in that, the described insulation support body outside is evenly distributed with five metallic conductors.
8. a direct current machine is characterized in that, comprises each described commutator such as claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220390972 CN202797566U (en) | 2012-08-08 | 2012-08-08 | Commutator and direct current motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220390972 CN202797566U (en) | 2012-08-08 | 2012-08-08 | Commutator and direct current motor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202797566U true CN202797566U (en) | 2013-03-13 |
Family
ID=47824753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220390972 Expired - Lifetime CN202797566U (en) | 2012-08-08 | 2012-08-08 | Commutator and direct current motor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202797566U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820598A (en) * | 2012-08-08 | 2012-12-12 | 捷和电机（深圳）有限公司 | Commutator and direct-current motor with same |
-
2012
- 2012-08-08 CN CN 201220390972 patent/CN202797566U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820598A (en) * | 2012-08-08 | 2012-12-12 | 捷和电机（深圳）有限公司 | Commutator and direct-current motor with same |
| CN102820598B (en) * | 2012-08-08 | 2015-07-01 | 捷和电机（深圳）有限公司 | Commutator and direct-current motor with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIEHE ELECTRIC MACHINE (SHENZHEN) CO., LTD. Free format text: FORMER OWNER: JIE AND ELECTRIC (SHENZHEN) CO., LTD. Effective date: 20131212 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131212 Address after: The 518104 Ring Road in the town Guangdong city of Shenzhen province Baoan District Shajing Tang Gang Da Tang Industrial Zone No. 10 building 1-7 Patentee after: CHIAPHUA COMPONENTS (SHENZHEN) Ltd. Address before: The 518104 Ring Road in the town Guangdong city of Shenzhen province Baoan District Shajing Tang Gang Da Tang Industrial Zone No. 8 Building C 2 to 3 Patentee before: CHIAPHUA COMPONENTS(SHENZHEN) Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |