CN215300419U - Motor capable of eliminating shaft current - Google Patents
Motor capable of eliminating shaft current Download PDFInfo
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- CN215300419U CN215300419U CN202121603997.1U CN202121603997U CN215300419U CN 215300419 U CN215300419 U CN 215300419U CN 202121603997 U CN202121603997 U CN 202121603997U CN 215300419 U CN215300419 U CN 215300419U
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Abstract
The utility model relates to a motor field specifically is a can eliminate motor of axle current, including motor shaft, end cover and rotary transformer apron, set up the mounting hole on the terminal surface of the non-transmission end of motor shaft, the one end of electrically conductive mechanism is installed in the mounting hole cooperation, set up elastic conductive parts's one side on the rotary transformer apron, the other end of electrically conductive mechanism touches with elastic conductive parts's the other side all the time, sets up annular closing plate on the end cover, sets up the connecting plate between the border outer wall of closing plate and the non-transmission end of motor shaft, and closing plate and connecting plate all are located between end cover and the elastic conductive parts. The utility model can effectively reduce bearing failure caused by bearing electric corrosion caused by shaft current, and prolong the service life of the bearing; because electrically conductive mechanism touches with elastic conductive part all the time, both wearing and tearing can produce the abrasive dust, and closing plate and connecting plate can completely cut off the abrasive dust, avoid the abrasive dust to get into and pollute inside the motor.
Description
Technical Field
The utility model relates to a motor field specifically is a can eliminate motor of axle current.
Background
When the permanent magnet motor for the new energy automobile is in the frequency conversion, can produce axle voltage between electric motor rotor axle, axle and bearing, when the axle voltage accumulated to the bearing maximum bearing value, can puncture the bearing and discharge in the bearing inside, and then produce the galvanic corrosion phenomenon, influence the life of bearing, increase the cost of maintenance of whole motor.
At present, in order to prevent the occurrence of the electric corrosion phenomenon of a motor bearing caused by shaft voltage, a mode of additionally installing a grounding ring is generally adopted to eliminate shaft current. However, on the grounding ring, the consumption of the annular conductive fiber bundle is large, the manufacturing cost is high, the reliability of the long-time use is unknown, and the generated abrasion particles easily pollute the interior of the motor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the motor bearing causes the bearing that the bearing galvanic corrosion leads to and inside the wearing and tearing granule pollutes the motor easily, in order to solve this problem, the utility model provides a can eliminate the motor of axle electric current, it can effectively reduce the bearing and cause the bearing galvanic corrosion bearing failure that leads to because of the axle electric current, avoids inside the wearing and tearing granule pollution motor.
The content of the utility model is a can eliminate motor of axle current, including motor shaft, end cover and rotary transformer apron, set up the mounting hole on the terminal surface of the non-transmission end of motor shaft, the one end of electrically conductive mechanism is installed in the mounting hole cooperation, set up elastic conductive parts's one side on the rotary transformer apron, the other end of electrically conductive mechanism touches with elastic conductive parts's the other side all the time, sets up annular closing plate on the end cover, sets up the connecting plate between the border outer wall of closing plate and the non-transmission end of motor shaft, and closing plate and connecting plate all are located between end cover and the elastic conductive parts.
Further, the sealing plate and the rotary variable cover plate are fixed on the end cover together through bolts.
Furthermore, the sealing plate is an aluminum plate, and the connecting plate is an annular rubber plate.
Furthermore, the conductive mechanism is provided with a hollow bolt, a conductive sleeve and a conductive fiber bundle, the hollow bolt is installed in the installation hole in a matching mode, the conductive sleeve is installed in the hollow bolt, one end of the conductive fiber bundle is installed in the conductive sleeve, and the other end of the conductive fiber bundle extends out of the hollow bolt and is always in contact with the other side of the elastic conductive component.
Furthermore, the other end of the conductive fiber bundle is soaked with conductive adhesive.
Further, the conductive sleeve is in interference fit with the hollow bolt.
Furthermore, the length of the other end of the conductive fiber bundle extending out of the hollow bolt is 3-5 mm.
Furthermore, the conductive fiber bundle is a carbon fiber bundling brush, a metal fiber or a conductive polymer fiber.
Furthermore, the elastic conductive part is provided with a conductive spring and a conductive metal sheet, one end of the conductive spring is fixedly connected with the rotary variable cover plate, one side of the conductive metal sheet is fixedly connected with the other end of the conductive spring, and the other side of the conductive metal sheet is always contacted with the other end of the conductive mechanism.
Furthermore, the conductive metal sheet is an aluminum sheet or a stainless steel sheet.
The utility model has the advantages that the elastic conductive part of the utility model enables the conductive mechanism to contact with the conductive mechanism all the time, so that the motor shaft can continuously transmit the shaft current to the rotary variable cover plate through the conductive mechanism and the elastic conductive part, thereby effectively reducing the bearing failure caused by the bearing electric corrosion caused by the shaft current, and prolonging the service life of the bearing; because electrically conductive mechanism touches with elastic conductive part all the time, both wearing and tearing can produce the abrasive dust, and closing plate and connecting plate can completely cut off the abrasive dust, avoid the abrasive dust to get into and pollute inside the motor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of the present invention;
FIG. 3 is a schematic structural view of the conductive mechanism of the present invention;
fig. 4 is a schematic structural diagram of the elastic conductive component of the present invention.
In the figure, 1, a motor shaft 2, a conductive mechanism 3, an elastic conductive part 4, a sealing plate 5, a rotary variable cover plate 21, a hollow bolt 22, a conductive sleeve 23, a conductive fiber bundle 31, a conductive spring 32 and a conductive metal sheet.
Detailed Description
As shown in the attached drawings 1-4, a motor capable of eliminating shaft current comprises a motor shaft 1, an end cover and a rotary transformer cover plate 5, wherein a mounting hole is formed in the end face of the non-transmission end of the motor shaft 1, one end of a conductive mechanism 2 is mounted in the mounting hole in a matched mode, one side of the rotary transformer cover plate 5, provided with an elastic conductive part 3, the other end of the conductive mechanism 2 is always in contact with the other side of the elastic conductive part 3, an annular sealing plate 4 is arranged on the end cover, a connecting plate is arranged between the sealing plate 4 and the outer wall of the periphery of the non-transmission end of the motor shaft 1, and the sealing plate 4 and the connecting plate are located between the end cover and the elastic conductive part 3. The elastic conductive part 3 enables the conductive mechanism 2 to be in contact with the conductive mechanism all the time, so that the motor shaft 1 can continuously transmit shaft current to the rotating cover plate 5 through the conductive mechanism 2 and the elastic conductive part 3, the bearing failure caused by bearing electric corrosion caused by the shaft current can be effectively reduced, and the service life of the bearing is prolonged; because electrically conductive mechanism 2 touches with elastic conductive part 3 all the time, both wearing and tearing can produce the abrasive dust, and the abrasive dust is avoided inside entering and polluting the motor to closing plate 4 and connecting plate can completely cut off the abrasive dust. The utility model discloses still have simple structure, do not increase motor axial space and motor volume, advantage that the cost is lower and be convenient for maintain.
The sealing plate 4 and the rotary variable cover plate 5 are fixed on the end cover together through bolts. The structure can facilitate the fixation of the sealing plate 4, and avoids additionally arranging a fixing hole on the end cover for fixing the sealing plate 4, thereby facilitating the reduction of working procedures and reducing the cost.
The sealing plate 4 is an aluminum plate to provide support strength, and the connecting plate is an annular rubber plate to avoid abrasion of the connecting plate to the motor shaft 1 when the motor shaft 1 rotates.
The conductive mechanism 2 can have various structures, preferably, a hollow bolt 21, a conductive sleeve 22 and a conductive fiber bundle 23 are provided, the hollow bolt 21 is installed in the installation hole in a matching way, the conductive sleeve 22 is installed in the hollow bolt 21, one end of the conductive fiber bundle 23 is installed in the conductive sleeve 22, and the other end of the conductive fiber bundle 23 extends out of the hollow bolt 21 and is always contacted with the other side of the elastic conductive component 3. This structure enables the motor shaft 1 to sequentially conduct the shaft current out through the hollow bolt 21, the conductive sleeve 22, and the conductive fiber bundle 23. The conductive mechanism 2 can also be a conductive fiber bundle which is directly arranged in the mounting hole, and the structure is simple, the cost is low, but the stability is insufficient, and the conductive fiber bundle can fall off.
The other end of the conductive fiber bundle 23 is dipped with conductive adhesive to ensure current transmission.
The conductive sleeve 22 is in interference fit with the hollow bolt 21, so that the conductive sleeve 22 and the hollow bolt 21 are fixed firmly.
The length of the other end of the conductive fiber bundle 23 extending out of the hollow bolt 21 is 3-5 mm.
The conductive fiber bundle 23 is a carbon fiber bundling brush, a metal fiber or a conductive polymer fiber. The conductive sleeve 22 may be a copper sleeve. After the conductive fiber bundle 23 is fixed in the inner conductive sleeve 22, the conductive sleeve 22 may be inserted into the hollow bolt 21 by using conductive adhesive for fixation, or may be installed in the hollow bolt 21 by screw-thread fit.
The elastic conductive component 3 can have various structures, preferably, it has a conductive spring 31 and a conductive metal sheet 32, one end of the conductive spring 31 is fixedly connected with the rotary cover plate 5, one side of the conductive metal sheet 32 is fixedly connected with the other end of the conductive spring 31, and the other side of the conductive metal sheet 32 is always contacted with the other end of the conductive mechanism 2. This structure provides an elastic member and a contact member, the elastic member is a conductive spring 31 which always pushes the contact member so that the contact member always contacts with the other end of the conductive mechanism 2, and the contact member is a conductive metal sheet 32 which facilitates the contact conduction with the conductive mechanism 2. The elastic conductive component 3 can also be a spring plate, one end of the spring plate is fixedly connected with the rotary variable cover plate 5, and the other end of the spring plate is contacted with the other end of the conductive mechanism 2. The structure is simple, the cost is low, but the stability of the elastic sheet is insufficient, the contact area with the other end of the conductive mechanism 2 is small, and the conductive efficiency is low.
The conductive metal sheet 32 is an aluminum sheet or a stainless steel sheet.
Claims (10)
1. An electric machine capable of eliminating shaft current, characterized in that: including motor shaft (1), end cover and rotary transformer apron (5), set up the mounting hole on the terminal surface of motor shaft (1) non-transmission end, the one end of electrically conductive mechanism (2) is installed in the mounting hole cooperation, set up the one side of elasticity conductive part (3) on rotary transformer apron (5), the other end of electrically conductive mechanism (2) touches with the other side of elasticity conductive part (3) all the time, set up annular closing plate (4) on the end cover, set up the connecting plate between the border outer wall of closing plate (4) and motor shaft (1) non-transmission end, closing plate (4) and connecting plate all are located between end cover and elasticity conductive part (3).
2. A motor capable of eliminating shaft current as claimed in claim 1, wherein: the sealing plate (4) and the rotary variable cover plate (5) are fixed on the end cover together through bolts.
3. A motor capable of eliminating shaft current as claimed in claim 1, wherein: the sealing plate (4) is an aluminum plate, and the connecting plate is an annular rubber plate.
4. A motor capable of eliminating shaft current as claimed in claim 1, wherein: the conductive mechanism (2) is provided with a hollow bolt (21), a conductive sleeve (22) and a conductive fiber bundle (23), the hollow bolt (21) is installed in the installation hole in a matching mode, the conductive sleeve (22) is installed in the hollow bolt (21), one end of the conductive fiber bundle (23) is installed in the conductive sleeve (22), and the other end of the conductive fiber bundle (23) extends out of the hollow bolt (21) and is always in contact with the other side of the elastic conductive part (3).
5. A motor capable of eliminating shaft current as claimed in claim 4, wherein: the other end of the conductive fiber bundle (23) is soaked with conductive adhesive.
6. A motor capable of eliminating shaft current as claimed in claim 4, wherein: the conductive sleeve (22) is in interference fit with the hollow bolt (21).
7. A motor capable of eliminating shaft current as claimed in claim 4, wherein: the length of the other end of the conductive fiber bundle (23) extending out of the hollow bolt (21) is 3-5 mm.
8. A motor capable of eliminating shaft current as claimed in claim 4, wherein: the conductive fiber bundle (23) is a carbon fiber bundling brush, a metal fiber or a conductive polymer fiber.
9. A motor capable of eliminating shaft current as claimed in claim 1, wherein: the elastic conductive part (3) is provided with a conductive spring (31) and a conductive metal sheet (32), one end of the conductive spring (31) is fixedly connected with the rotary-change cover plate (5), one side of the conductive metal sheet (32) is fixedly connected with the other end of the conductive spring (31), and the other side of the conductive metal sheet (32) is always in contact with the other end of the conductive mechanism (2).
10. A motor capable of eliminating shaft current as claimed in claim 9, wherein: the conductive metal sheet (32) is an aluminum sheet or a stainless steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121603997.1U CN215300419U (en) | 2021-07-14 | 2021-07-14 | Motor capable of eliminating shaft current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121603997.1U CN215300419U (en) | 2021-07-14 | 2021-07-14 | Motor capable of eliminating shaft current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215300419U true CN215300419U (en) | 2021-12-24 |
Family
ID=79522416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121603997.1U Active CN215300419U (en) | 2021-07-14 | 2021-07-14 | Motor capable of eliminating shaft current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215300419U (en) |
-
2021
- 2021-07-14 CN CN202121603997.1U patent/CN215300419U/en active Active
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