CN211266663U - Electric automobile driving motor and electric automobile - Google Patents
Electric automobile driving motor and electric automobile Download PDFInfo
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- CN211266663U CN211266663U CN202020202016.1U CN202020202016U CN211266663U CN 211266663 U CN211266663 U CN 211266663U CN 202020202016 U CN202020202016 U CN 202020202016U CN 211266663 U CN211266663 U CN 211266663U
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- motor shaft
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model provides an electric automobile driving motor and electric automobile. The electric automobile driving motor comprises a motor shaft, a rotor sleeved on the motor shaft, a stator sleeved on the periphery of the rotor, a casing sleeved on the stator, a first end cover, a first bearing and a conducting ring, wherein the casing comprises a side wall structure which is annularly arranged, at least part of the motor shaft, the rotor and the stator are accommodated in the side wall structure, the side wall structure is provided with a first opening, the first end cover is arranged on the first opening in a covering mode, the first end cover is provided with a first through hole which corresponds to the motor shaft and at least part of which accommodates the motor shaft, the first bearing is at least partially positioned in the first through hole, sleeved outside the motor shaft and contacted with the first end cover, and the conducting ring is also at least partially positioned in the first through hole, sleeved outside the motor shaft and contacted with the first end cover. The bearing reliability of the electric automobile driving motor is good.
Description
Technical Field
The utility model relates to a driving motor technical field especially relates to an electric automobile driving motor and electric automobile.
Background
In recent years, electric vehicles (including pure electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, extended range electric vehicles, and the like) have been developed rapidly and are increasingly seen by the general public. Generally, a driving motor is required to drive wheels of an electric automobile, however, due to the characteristics of parasitic capacitance of the driving motor and high du/dt (voltage derivative to time) of a frequency converter, a shaft voltage is formed between an inner ring and an outer ring of a bearing of the driving motor, the amplitude of the shaft voltage is in positive correlation with the voltage and output power of the driving motor, when the shaft voltage reaches a certain value, an oil film between the inner ring and the outer ring of the bearing is broken down and discharged, so that the bearing raceway is damaged, the service life of the bearing is reduced, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, in one aspect, a driving motor for an electric vehicle is provided, which includes a motor shaft, a rotor sleeved on the motor shaft, a stator sleeved on the rotor, a casing sleeved on the stator, a first end cover, a first bearing, and a conductive ring, wherein the casing includes a side wall structure annularly disposed, the side wall structure accommodates at least a portion of the motor shaft, the rotor, and the stator, the side wall structure further includes a first opening, the first end cover is disposed on the first opening, the motor shaft extends from the first opening, the first end cover has a first through hole corresponding to the motor shaft and at least partially accommodating the motor shaft, the first bearing is at least partially disposed in the first through hole, sleeved outside the motor shaft, and electrically contacted with the first end cover, and at least partially disposed in the first through hole, The first end cover is sleeved outside the motor shaft and is electrically contacted with the first end cover.
According to the utility model discloses an embodiment, the conducting ring includes cyclic annular main part and a plurality of certainly the inboard court of cyclic annular main part the motor shaft extend and with motor shaft electric contact's conductive fiber.
According to an embodiment of the present invention, the plurality of conductive fibers are densely arranged and arranged in a ring shape along an inner side of the ring-shaped main body portion.
According to the utility model discloses an embodiment, cyclic annular main part interference install in the first through-hole and with first end cover electrical contact.
According to an embodiment of the present invention, the first bearing is adjacent to the rotor, and the conducting ring is disposed in the first bearing is away from one side of the rotor, the first end cap is adjacent to the surface of the rotor and the first bearing is adjacent to the surface level of the rotor, the first end cap is away from the surface of the rotor and the conducting ring is away from the surface level of the first bearing.
According to an embodiment of the present invention, the first bearing and the conducting ring have a spacing space therebetween.
According to the utility model discloses an embodiment, first through-hole is including acceping the first part of first bearing, acceping the second part of conducting ring and connect in first part with third part between the second part, conducting ring interference install in the second part with second part electric contact, the third part encloses into the interval space, the diameter of first part is greater than the diameter of third part, first bearing is followed the thickness of motor shaft extending direction is greater than the conducting ring is followed the thickness of motor shaft extending direction.
According to the utility model discloses an embodiment, first end cover is the rear end cap, first bearing is the rear end bearing, electric automobile driving motor still includes front end housing and front bearing, the lateral wall structure still has and is located the second opening of the opposite one side of first opening, the front end housing lid is established on the second opening, the motor shaft certainly the second opening stretches out, just the front end housing has the correspondence the motor shaft just makes the second through-hole that the motor shaft passed, front bearing install in the second through-hole, the cover is located on the motor shaft and with front end housing electric contact.
According to the utility model discloses an embodiment, the front end housing is close to the surface of rotor with the front bearing is close to the surface parallel and level of rotor, the front end housing is followed the thickness of motor shaft extending direction is greater than the front bearing is followed the thickness of motor shaft extending direction, the second through-hole is including acceping the fourth part of front bearing and connecting the fifth part of fourth part, the diameter of fourth part is greater than the diameter of fifth part, the motor shaft passes in proper order the second opening reaches the second through-hole is in order to stretch out outside the second through-hole.
In order to solve the above technical problem, on the other hand, an electric vehicle is provided, wherein the electric vehicle uses the electric vehicle driving motor according to any one of the above embodiments.
Compared with the prior art, the utility model discloses in electric automobile driving motor and electric automobile, be located through at least part in the first through-hole, the cover is located the motor shaft outer and with the conducting ring of first end cover contact can switch on the inner race of primary shaft and form the equipotential, the axle current of motor shaft can according to the preface via the conducting ring first end cover ground connection, and then can effectively reduce the influence of axle voltage to the bearing, prevent that axle voltage from puncturing the oil film, improve primary shaft bearing life and reliability.
According to the utility model discloses an embodiment, cyclic annular main part can via first end cover ground connection, a plurality of with motor shaft electric contact arranges into annular conductive fiber with the concentration that switches on and can make the motor shaft with form a plurality of parallel conductive path between the first end cover, reach better effect of switching on.
According to the utility model discloses an embodiment, cyclic annular main part interference install in the first through-hole and with parts such as installing support and bolt have been saved in the contact of first end cover, make electric automobile driving motor occupation space is less, part is small in quantity, simple to operate.
According to the utility model discloses an embodiment, first bearing with have the space between the conducting ring, can avoid first bearing with the unnecessary friction that the conducting ring contact caused.
According to the utility model discloses an embodiment, first bearing with the conducting ring install respectively with first portion with in the second portion, also can make first bearing with the conducting ring install separately and be difficult for receiving the influence of the other party, and reliability and convenient degree are higher.
According to the utility model discloses an embodiment, the motor shaft still via the fore-stock with front end housing electric contact, and then can via front end housing ground connection also can effectively reduce the influence of axle voltage to the bearing, prevents that axle voltage from puncturing the oil film, improves the life and the reliability of fore-stock.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic sectional view of an embodiment of the electric vehicle driving motor of the present invention.
Fig. 2 is a schematic plan view of a conductive ring of the electric vehicle driving motor shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terms "first," "second," and "third," etc. in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of an embodiment of a driving motor 10 for an electric vehicle according to the present invention. The electric vehicle driving motor 10 may be a permanent magnet synchronous driving motor, and includes a motor shaft 11, a rotor 12, a stator 13, a casing 14, a first end cap 15, a first bearing 16, a conductive ring 17, a second end cap 18, and a second bearing 19.
The rotor 12 is sleeved on the motor shaft 11, and the motor shaft 11 can drive the rotor 12 to rotate along the axial direction of the motor shaft 11.
The stator 13 is sleeved on the periphery of the rotor 12, and may include a stator core and a winding.
The casing 14 is sleeved on the stator 13 and includes a side wall structure 140. The side wall structure 140 accommodates at least a part of the motor shaft 11, the rotor 12, and the stator 13. The sidewall structure 140 further includes a first opening 141 and a second opening 142 disposed opposite to each other, the first end cap 15 is disposed on the first opening 141, and the second end cap 18 is disposed on the second opening 142.
One end of the motor shaft 11 extends from the first opening 141, and the other end extends from the second opening 142. The first end cap 15 has a first through hole 151 corresponding to the motor shaft 11 and at least partially accommodating the motor shaft 11, the first bearing 16 is at least partially located in the first through hole 151, sleeved outside the motor shaft 11 and electrically contacted with the first end cap 15, and the conductive ring 17 is also at least partially located in the first through hole 151, sleeved outside the motor shaft 11 and electrically contacted with the first end cap 15. The second end cap 18 has a second through hole 181 corresponding to the motor shaft 11 and allowing one end of the motor shaft 11 to pass through, and the second bearing 19 is installed in the second through hole 181, sleeved on the motor shaft 11, and electrically contacted with the second end cap 18. The motor shaft 11 sequentially passes through the second opening 142 and the second through hole 181 to extend out of the second through hole 181. It is understood that the electrical contact means that the two are in direct contact, i.e. electrically connected.
Further, the first bearing 16 is disposed adjacent to the rotor 12, and the conductive ring 17 is disposed on a side of the first bearing 16 away from the rotor 12, a surface of the first end cover 15 adjacent to the rotor 12 is substantially flush with a surface of the first bearing 16 adjacent to the rotor 12, and a surface of the first end cover 15 away from the rotor 12 is substantially flush with a surface of the conductive ring 17 away from the first bearing 16.
There may be a spacing space 150 between the first bearing 16 and the conductive ring 17. Specifically, the first through hole 151 includes a first portion 151a receiving the first bearing 16, a second portion 151b receiving the conductive ring 17, and a third portion 151c connected between the first portion 151a and the second portion 151 b. The conductive ring 17 may be interference mounted in the second portion 151b to be in electrical contact with the second portion 151 b. The third portion 151c encloses the spacing space 150. The diameter of the first portion 151a may be greater than the diameter of the third portion 151 c. The thickness of the first bearing 16 in the extending direction of the motor shaft 11 is greater than the thickness of the conductive ring 17 in the extending direction of the motor shaft 11.
The surface of the second end cover 18 adjacent to the rotor 12 is substantially flush with the surface of the second bearing 19 adjacent to the rotor 12, the thickness of the second end cover 18 in the extending direction of the motor shaft 11 is greater than the thickness of the second bearing 19 in the extending direction of the motor shaft 11, the second through hole 181 includes a fourth portion 181a for accommodating the second bearing 19 and a fifth portion 181b connected to the fourth portion 181a, and the diameter of the fourth portion 181a is greater than the diameter of the fifth portion 181 b.
In this embodiment, the first end cap 15 is a rear end cap, the first bearing 16 is a rear bearing, the second end cap 18 is a front end cap, the second bearing 19 is a front bearing, and the conductive ring 17 is disposed corresponding to the first through hole 151 of the rear end cap and electrically connected to the rear end cap and the motor shaft 11; however, in a modified embodiment, the conductive rings 17 may be disposed corresponding to the second through hole 181 of the front cover and electrically connect the front cover and the motor shaft 11, or in another modified embodiment, the number of the conductive rings 17 is two, the two conductive rings 17 are disposed in the first through hole 151 and the second through hole 181 respectively, one conductive ring 17 electrically connects the front cover and the motor shaft 11, and the other conductive ring 17 electrically connects the rear cover and the motor shaft 11.
Referring to FIG. 2, FIG. 2 is a schematic plan view of the conductive ring 17. The conductive ring 17 includes an annular main body 171 and a plurality of conductive fibers 172 extending from the inner side of the annular main body 171 toward the direction of the motor shaft 11 and electrically contacting the motor shaft 11. The annular body 171 is made of a conductive metal material, and the annular body 171 can be installed in the first through hole 151 in an interference manner and electrically contact with the first end cap 15. The plurality of conductive fibers 172 may be densely arranged in multiple layers along the inner side of the annular body 171 and arranged in a ring shape. In detail, when viewed along the axial direction of the conductive ring 17, the plurality of conductive fibers 172 are arranged in a ring shape, and the plurality of conductive fibers 172 are further arranged in multiple layers along the axial direction of the conductive ring 17, adjacent conductive fibers 172 may have a small gap therebetween or may contact each other.
When the electric vehicle driving motor 10 works, the first end cover 15 and the second end cover 18 are both grounded, and a shaft current path of the motor shaft 11 can be released through the following paths: proceeding from the rotor 12, through the motor shaft 11 → the conductive ring 17 → the first end cap 15, the second end cap 16 → the ground end.
Compared with the prior art, the utility model discloses in electric automobile driving motor 10, be located through at least part in the first through-hole 151a, the cover is located motor shaft 11 outer and with the conducting ring 17 of first end cover 15 contact can with the outer lane switches on and forms the equipotential in first bearing 16, motor shaft 11's axle current can according to the preface via conducting ring 17 first end cover 15 ground connection, and then can effectively reduce the influence of axle voltage to the bearing, prevents that the oil film is punctured to the axle voltage, improves 16 life and the reliability of first bearing.
According to the utility model discloses an embodiment, cyclic annular main part 171 can via first end cover 15 ground connection, a plurality of with motor shaft 11 electric contact arranges into annular conductive fiber 172 with the intensive of switching on can make motor shaft 11 with form a plurality of parallel conductive path between the first end cover 15, reach better effect of switching on.
According to the utility model discloses an embodiment, cyclic annular main part 171a interference install in first through-hole 151 and with parts such as installing support and bolt have been saved in the contact of first end cover 15, make electric automobile driving motor 10 occupation space is less, part is small in quantity, simple to operate.
According to an embodiment of the present invention, the first bearing 16 and the conducting ring 17 have a space therebetween, so that unnecessary friction caused by contact between the first bearing 16 and the conducting ring 17 can be avoided.
According to the utility model discloses an embodiment, first bearing 16 with conducting ring 17 install respectively with in first portion 151a with in second portion 151b, also can make first bearing 16 with the conducting ring 17 install separately and be difficult for receiving the influence of the other party, and reliability and convenient degree are higher.
According to the utility model discloses an embodiment, motor shaft 11 still via second bearing 19 with 18 electrical contact of second end cover, and then can via 18 ground connection of second front end cover also can effectively reduce the influence of axle voltage to the bearing, prevents that the axle voltage from puncturing the oil film, improves second bearing 19's life and reliability.
An embodiment of the present invention also provides an electric vehicle using the electric vehicle driving motor 10 according to any one of the above embodiments.
The above disclosure is only one embodiment of the present invention, and certainly should not be limited thereto, and the scope of the invention is accordingly intended to be encompassed by the present invention, even if equivalents thereof are made.
Claims (10)
1. The electric automobile driving motor is characterized by comprising a motor shaft, a rotor sleeved on the motor shaft, a stator sleeved on the periphery of the rotor, a casing sleeved on the stator, a first end cover, a first bearing and a conductive ring, wherein the casing comprises a side wall structure which is annularly arranged, at least part of the motor shaft, the rotor and the stator are accommodated in the side wall structure, the side wall structure further comprises a first opening, the first end cover is arranged on the first opening in a covering manner, the motor shaft extends out of the first opening, the first end cover is provided with a first through hole which corresponds to the motor shaft and at least part of the conductive ring is accommodated in the motor shaft, the first bearing is at least partially positioned in the first through hole, sleeved outside the motor shaft and electrically contacted with the first end cover, and at least part of the first bearing is positioned in the first through hole, The first end cover is sleeved outside the motor shaft and is electrically contacted with the first end cover.
2. The electric vehicle driving motor according to claim 1, characterized in that: the conducting ring comprises an annular main body part and a plurality of conducting fibers which extend from the inner side of the annular main body part to the motor shaft and are electrically contacted with the motor shaft.
3. The electric vehicle driving motor according to claim 2, characterized in that: the conductive fibers are densely arranged along the inner side of the annular main body part and are arranged in an annular shape.
4. The electric vehicle driving motor according to claim 2, characterized in that: the annular main body part is arranged in the first through hole in an interference mode and is in electrical contact with the first end cover.
5. The electric vehicle driving motor according to claim 1, characterized in that: the first bearing is arranged adjacent to the rotor, the conducting ring is arranged on one side, away from the rotor, of the first bearing, the surface, close to the rotor, of the first end cover is flush with the surface, close to the rotor, of the first bearing, and the surface, away from the rotor, of the first end cover is flush with the surface, away from the first bearing, of the conducting ring.
6. The electric vehicle driving motor according to claim 1, characterized in that: a spacing space is arranged between the first bearing and the conducting ring.
7. The electric vehicle driving motor according to claim 6, characterized in that: the first through hole comprises a first part for accommodating the first bearing, a second part for accommodating the conducting ring and a third part connected between the first part and the second part, the conducting ring is arranged in the second part in an interference mode to be in electrical contact with the second part, the third part surrounds the spacing space, the diameter of the first part is larger than that of the third part, and the thickness of the first bearing along the extension direction of the motor shaft is larger than that of the conducting ring along the extension direction of the motor shaft.
8. The electric vehicle driving motor according to claim 1, characterized in that: the first end cover is a rear end cover, the first bearing is a rear bearing, the electric automobile driving motor further comprises a front end cover and a front bearing, the side wall structure is further provided with a second opening located on the opposite side of the first opening, the front end cover is arranged on the second opening, the motor shaft extends out of the second opening, the front end cover is provided with a second through hole corresponding to the motor shaft and enabling the motor shaft to penetrate through, and the front bearing is arranged in the second through hole and sleeved on the motor shaft and is in electric contact with the front end cover.
9. The electric vehicle drive motor according to claim 8, characterized in that: the surface of the front end cover adjacent to the rotor is flush with the surface of the front bearing adjacent to the rotor, the thickness of the front end cover in the extension direction of the motor shaft is larger than that of the front bearing in the extension direction of the motor shaft, the second through hole comprises a fourth part accommodating the front bearing and a fifth part connected with the fourth part, the diameter of the fourth part is larger than that of the fifth part, and the motor shaft sequentially penetrates through the second opening and the second through hole to extend out of the second through hole.
10. An electric vehicle, characterized in that the electric vehicle comprises an electric vehicle drive motor according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020202016.1U CN211266663U (en) | 2020-02-24 | 2020-02-24 | Electric automobile driving motor and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020202016.1U CN211266663U (en) | 2020-02-24 | 2020-02-24 | Electric automobile driving motor and electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN211266663U true CN211266663U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020202016.1U Active CN211266663U (en) | 2020-02-24 | 2020-02-24 | Electric automobile driving motor and electric automobile |
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| CN (1) | CN211266663U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949220A (en) * | 2021-09-15 | 2022-01-18 | 浙江中车尚驰电气有限公司 | Plug screw formula axle current protection electric installation |
| CN116599297A (en) * | 2023-05-17 | 2023-08-15 | 广州小鹏汽车科技有限公司 | Stator assembly, motor and vehicle |
-
2020
- 2020-02-24 CN CN202020202016.1U patent/CN211266663U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949220A (en) * | 2021-09-15 | 2022-01-18 | 浙江中车尚驰电气有限公司 | Plug screw formula axle current protection electric installation |
| CN113949220B (en) * | 2021-09-15 | 2023-11-03 | 浙江中车尚驰电气有限公司 | Screw plug type shaft current protection conductive device |
| CN116599297A (en) * | 2023-05-17 | 2023-08-15 | 广州小鹏汽车科技有限公司 | Stator assembly, motor and vehicle |
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