CN114268193B - Vehicle, electric drive system and processing method thereof - Google Patents
Vehicle, electric drive system and processing method thereof Download PDFInfo
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- CN114268193B CN114268193B CN202111624961.6A CN202111624961A CN114268193B CN 114268193 B CN114268193 B CN 114268193B CN 202111624961 A CN202111624961 A CN 202111624961A CN 114268193 B CN114268193 B CN 114268193B
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- cooling oil
- oil ring
- drive system
- electric drive
- copper bar
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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 invention provides a vehicle, an electric drive system and a processing method thereof, wherein the cooling oil ring and the three-phase copper bar connecting piece are arranged into an integrated piece, so that the number of parts and the number of opened moulds of the electric drive system are reduced, a necessary positioning structure and characteristics during the installation of the cooling oil ring can be omitted, the assembly process is simplified, a clamping reference during the welding of the three-phase copper bar connecting piece is provided, and the step of installing the cooling oil ring is omitted; the cooling oil ring and the shell are arranged into an integral piece, so that an oil duct sealing function between the cooling oil ring and the shell is realized, and the failure risk of the oil duct position is greatly reduced; and the cooling oil ring does not need additional matching angle characteristics in design.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a vehicle, an electric drive system and a processing method thereof.
Background
At present, the motor is at the actual motion in-process, when being in the big moment of torsion of low-speed, the stator and the rotor of motor can send a large amount of heats, the radiating mode of motor is mostly seting up the spiral water runner in motor machine casing inside, flow through the circulation of water in the machine casing, and then realize the refrigerated effect of motor, there is motor stator winding (coil) in this kind of cooling mode, the rotor can't obtain direct cooling, the main source of generating heat of motor can not obtain effectual cooling, consequently, motor heat load is limited, and then it is limited to lead to the motor volume.
In order to improve the cooling efficiency of the motor in the prior art, a cooling mode of oil cooling type cooling has appeared, because the cooling oil has no conductivity, the cooling oil can be directly contacted with each heating source of the motor, each heating source of the motor is effectively cooled, under the same performance requirement, the oil cooling motor is compared with the traditional water cooling motor, the heat load is improved, the motor volume can be reduced, the power density is further improved, the cooling oil can simultaneously lubricate and cool the motor bearing, the service life of the motor is further prolonged, but the oil circuit structure is complex, the processing technology is complex, the oil circuit structure adopts the processing technologies of screw fastening, welding and the like, the structure of each part is complex, and the processing cost is high.
The cooling oil ring with the cooling function needs independent die sinking, is complex in assembly and is not easy to control the position. For the independent assembly of the cooling oil ring, special positioning, fixing, relative positions and the like need to be considered, so that the independent assembly is complex and does not generate practical value.
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide a vehicle with an integrated structure of a cooling oil ring and a motor accessory, an electric drive system and a processing method thereof.
The invention discloses an electric drive system, which comprises a motor and a controller, wherein the motor is arranged in a shell; the motor is connected with the controller through a three-phase copper bar connecting piece; the cooling oil ring is arranged at one end or two ends of the motor; the cooling oil ring and the three-phase copper bar connecting piece are integrated, or the cooling oil ring and the shell are integrated.
Preferably, the three-phase copper bar connecting piece comprises an insert injection molding unit and three metal connecting units, wherein the three metal connecting units are respectively connected with the insert injection molding unit and are circumferentially arranged on the insert injection molding unit; when the cooling oil ring and the three-phase copper bar connecting piece are integrated, the side face of the insert injection molding unit is connected with the inner wall face of the cooling oil ring.
Preferably, the inner wall surface of the cooling oil ring comprises an oil injection surface provided with a plurality of circumferentially arranged oil injection holes and a flow passage surface not provided with the oil injection holes, and the oil injection surface and the flow passage surface are ring surfaces; and the side surface of the insert injection molding unit is connected with the runner surface.
In a preferred embodiment of the method of the invention, the runner surface comprises a first sub-surface close to the motor and a second sub-surface far away from the motor; the oil injection surface is arranged between the first sub-surface and the second sub-surface; and the side surface of the insert injection molding unit is connected with the second sub-surface.
Preferably, when the cooling oil ring is integrated with the housing, the cooling oil ring is arranged on the end face of the housing and is arranged coaxially with the housing; the cooling oil ring has an inner diameter larger than that of the housing.
The invention also discloses a processing method of the electric drive system, which is used for processing the electric drive system; when the electric drive system with the cooling oil ring and the three-phase copper bar connecting piece integrated is processed, a first positioning piece on the three-phase copper bar connecting piece is aligned to a second positioning piece on the inner wall surface of the cooling oil ring, a clamping piece is arranged on the inner wall surface of the cooling oil ring, the three-phase copper bar connecting piece is clamped and fixed through the clamping piece, and then the three-phase copper bar connecting piece is welded and connected with the inner wall surface of the cooling oil ring; when the electric drive system with the cooling oil ring and the shell integrated is processed, a third positioning piece on the cooling oil ring is aligned to a fourth positioning piece on the shell, and then the cooling oil ring and the end face of the shell are subjected to integrated die casting, so that the cooling oil ring is in sealed connection with the shell.
The third positioning piece is a rotary oil area, and the fourth positioning piece is an axial oil duct; the cooling oil in the axial oil passage in the housing flows to the rotary oil area on the cooling oil ring and then flows to the other axial oil passage.
The invention also discloses a vehicle provided with the electric drive system.
After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:
1. the cooling oil ring and the three-phase copper bar connecting piece are arranged into an integrated piece, so that the number of parts and the number of die sinking of an electric drive system are reduced, a necessary positioning structure and characteristics during installation of the cooling oil ring can be eliminated, the assembly procedure is simplified, a clamping reference during welding of the three-phase copper bar connecting piece is provided, and the step of installing the cooling oil ring is eliminated;
2. the cooling oil ring and the shell are arranged into an integral piece, so that an oil passage sealing function between the cooling oil ring and the shell is realized, and the failure risk of an oil passage position is greatly reduced; and the cooling oil ring does not need additional matching angle characteristics in design.
Drawings
Fig. 1 is a schematic structural diagram of an electric drive system in which the cooling oil ring and the three-phase copper bar connecting piece are an integrated piece according to the present invention;
FIG. 2 is a perspective view of the cooling oil ring and the three-phase copper bar connecting piece provided by the invention as an integrated piece;
FIG. 3 is another perspective view of the cooling oil ring and the three-phase copper bar connecting piece provided by the invention as an integrated piece;
fig. 4 is a schematic structural diagram of an electric drive system in which the cooling oil ring and the housing are integrated.
Wherein: the method comprises the following steps of 1-casing, 2-motor, 3-three-phase copper bar connecting piece, 301-insert injection molding unit, 302-metal connecting unit and 4-cooling oil ring.
Detailed Description
The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if," as used herein, may be interpreted as "at \8230; \8230when" or "when 8230; \823030when" or "in response to a determination," depending on the context.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.
Referring to fig. 1, the present invention discloses an electric drive system, which includes a motor 2 and a controller, wherein the motor 2 is disposed in a housing 1 and includes a stator and a rotor. The motor 2 is connected with the controller through the three-phase copper bar connecting piece 3 to control the stator winding by the controller.
Referring to fig. 2, the three-phase copper bar connecting piece 3 includes an insert injection molding unit 301 and three metal connecting units 302, the three metal connecting units 302 are respectively connected with the insert injection molding unit 301 and are circumferentially arranged on the insert injection molding unit 301, and the three metal connecting units 302 are used for connecting three-phase wiring of a controller.
In order to realize the cooling of the stator or the shell 1 or the rotor or the common cooling of the stator or the shell 1 or the rotor, a cooling oil ring 4 is further arranged, the cooling oil ring 4 is arranged at one end or two ends of the motor 2, an oil spray hole and an oil duct are arranged on the cooling oil ring 4, and the stator or the shell 1 or the rotor or the common cooling of the stator or the shell 1 or the rotor is realized through the oil spray hole and the oil duct.
The cooling oil ring 4 and the three-phase copper bar connecting piece 3 are integrated, so that the parts of the electric drive system can be simplified, the installation step of the separate cooling oil ring 4 is not needed during the installation, and the risk of reference positioning deviation of the cooling oil ring 4 is avoided.
The cooling oil ring 4 and the three-phase copper bar connecting piece 3 are integrated, and the side surface of the insert injection molding unit 301 of the three-phase copper bar connecting piece 3 is integrally connected with the inner wall surface of the cooling oil ring 4.
Further, the inner wall surface of the cooling oil ring 4 includes two ring surfaces, one is an oil injection surface provided with a plurality of circumferentially arranged oil injection holes, the other is a runner surface not provided with the oil injection holes, and the oil injection surface and the runner surface are ring surfaces.
In some embodiments, the thickness of the oil injection surface is higher than that of the flow passage surface, so that the cooling oil flowing out of the oil injection hole can flow to the flow passage surface to be merged with other oil passages on the cooling oil ring 4.
In other embodiments, the thickness of the oil spray surface is lower than that of the flow passage surface, so that the cooling oil flowing out of the oil spray hole only flows in the oil spray surface all the time.
The side surface of the insert injection molding unit 301 of the three-phase copper bar connecting piece 3 is connected with the runner surface, so that the oil injection process of an oil injection hole on the oil injection surface is prevented from being obstructed.
Further, the runner surface comprises a first sub surface close to the motor 2 and a second sub surface far away from the motor 2, the oil injection surface is arranged between the first sub surface and the second sub surface, namely, between the first sub surface and the second sub surface, and the side surface of the insert injection molding unit 301 is connected with the second sub surface, namely, the side surface far away from the motor 2, so that the obstruction to the oil injection process of the oil injection hole on the oil injection surface is avoided.
However, in other embodiments, the side surface of the insert injection unit 301 is connected to the first sub-surface, that is, the surface close to the motor 2, and since the three metal connection units 302 of the three-phase copper bar connection member 3 are axially extending members, all three metal connection units 302 pass through the oil spraying surface, so that the cooling oil sprayed from the oil spraying holes can also cool the three-phase copper bar connection member 3.
Referring to fig. 4, the present invention also proposes a structure in which the cooling oil ring 4 is integrated with the housing 1, and the cooling oil ring 4 is disposed on the end face of the housing 1 and is disposed coaxially with the housing 1.
The insert injection molding unit 301 of the cooling oil ring 4 and the end face of the housing 1 are integrally die-cast, so that the process of sealing the cooling oil ring 4 is omitted during assembly, the sealing failure problem of the cooling oil ring 4 is avoided, and the connection sealing performance of the cooling oil ring 4 and an oil duct on the housing 1 is ensured.
The inner diameter of the cooling oil ring 4 is larger than that of the shell 1, so that a gap is formed between the cooling oil ring 4 and the stator, the stator is sealed, and the cooling oil ring 4 is overhauled.
The invention also discloses a processing method of the electric drive system, which is used for processing the electric drive system.
When processing the electric drive system of cooling oil ring 4 and three-phase copper bar connecting piece 3 formula spare as an organic whole, refer to figure 3, aim at the second setting element of 4 internal face of cooling oil ring with the first setting element on the three-phase copper bar connecting piece 3, set up the holder at the internal face of cooling oil ring 4, through holder centre gripping fixed three-phase copper bar connecting piece 3, carry out welded connection with the internal face of three-phase copper bar connecting piece 3 and cooling oil ring 4 again. The situation that the three-phase copper bar connecting piece 3 with irregular appearance in the prior art is difficult to set the axial and circumferential datum positioning to cause poor position degree is avoided.
When the electric drive system with the cooling oil ring 4 and the housing 1 integrated is processed, the third positioning piece on the cooling oil ring 4 is aligned with the fourth positioning piece on the housing 1, and then the cooling oil ring 4 and the end face of the housing 1 are subjected to integrated die casting, so that the cooling oil ring 4 and the housing 1 are connected in a sealing manner.
The third positioning element is a rotary oil area, the fourth positioning element is an axial oil duct, and cooling oil in the axial oil duct in the shell 1 flows to the rotary oil area on the cooling oil ring 4 and then flows to the other axial oil duct, so that the cooling oil in the shell 1 is folded back.
The invention also discloses a vehicle which is provided with the electric drive system, so that the assembly of the electric drive system is simplified, and the position precision of the cooling oil ring 4 is improved.
It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.
Claims (6)
1. An electric drive system, characterized in that the electric drive system comprises a motor and a controller, the motor is arranged in a housing; the motor is connected with the controller through a three-phase copper bar connecting piece;
the cooling oil ring is arranged at one end or two ends of the motor;
the cooling oil ring and the three-phase copper bar connecting piece are integrated, or the cooling oil ring and the shell are integrated;
the three-phase copper bar connecting piece comprises an insert injection molding unit and three metal connecting units, wherein the three metal connecting units are respectively connected with the insert injection molding unit and are circumferentially arranged on the insert injection molding unit; when the cooling oil ring and the three-phase copper bar connecting piece are integrated, the side face of the insert injection molding unit is connected with the inner wall face of the cooling oil ring; the inner wall surface of the cooling oil ring comprises an oil injection surface provided with a plurality of circumferentially arranged oil injection holes and a flow channel surface not provided with the oil injection holes, and the oil injection surface and the flow channel surface are ring surfaces; and the side surface of the insert injection molding unit is connected with the runner surface.
2. The electric drive system of claim 1, wherein the flowpath face comprises a first sub-face proximate the electric machine and a second sub-face distal the electric machine; the oil injection surface is arranged between the first sub-surface and the second sub-surface;
and the side surface of the insert injection molding unit is connected with the second sub-surface.
3. The electric drive system of claim 1, wherein the cooling oil ring is disposed on an end face of the housing and is disposed coaxially with the housing when the cooling oil ring is integral with the housing;
the cooling oil ring has an inner diameter larger than that of the housing.
4. A method for manufacturing an electric drive system, characterized by manufacturing an electric drive system according to any of the preceding claims 1-3;
when the electric drive system with the cooling oil ring and the three-phase copper bar connecting piece integrated is processed, a first positioning piece on the three-phase copper bar connecting piece is aligned to a second positioning piece on the inner wall surface of the cooling oil ring, a clamping piece is arranged on the inner wall surface of the cooling oil ring, the three-phase copper bar connecting piece is clamped and fixed through the clamping piece, and then the three-phase copper bar connecting piece is welded and connected with the inner wall surface of the cooling oil ring;
when the electric drive system with the cooling oil ring and the shell integrated is processed, a third positioning piece on the cooling oil ring is aligned to a fourth positioning piece on the shell, and then the cooling oil ring and the end face of the shell are subjected to integrated die casting, so that the cooling oil ring is in sealed connection with the shell.
5. The machining method according to claim 4, wherein the third positioning element is a rotary oil area, and the fourth positioning element is an axial oil passage; the cooling oil in the axial oil passage in the housing flows to the rotary oil area on the cooling oil ring and then flows to the other axial oil passage.
6. A vehicle, characterized in that it is provided with an electric drive system according to any one of the preceding claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111624961.6A CN114268193B (en) | 2021-12-28 | 2021-12-28 | Vehicle, electric drive system and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111624961.6A CN114268193B (en) | 2021-12-28 | 2021-12-28 | Vehicle, electric drive system and processing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114268193A CN114268193A (en) | 2022-04-01 |
| CN114268193B true CN114268193B (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111624961.6A Active CN114268193B (en) | 2021-12-28 | 2021-12-28 | Vehicle, electric drive system and processing method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114899979B (en) * | 2022-05-09 | 2023-07-25 | 浙江奥思伟尔电动科技有限公司 | Device for improving heat dissipation performance of motor winding |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014117033A (en) * | 2012-12-07 | 2014-06-26 | Nsk Ltd | Electric vehicle drive device |
| CN110581382A (en) * | 2019-09-04 | 2019-12-17 | 上海伊控动力系统有限公司 | Alternating current conductive sealing member structure for new energy electric drive system |
| CN111463959A (en) * | 2020-04-30 | 2020-07-28 | 莱茵动力(锦州)有限公司 | Three-in-one power assembly system |
| CN212649253U (en) * | 2020-06-29 | 2021-03-02 | 威睿电动汽车技术(宁波)有限公司 | Motor oil cooling device, motor assembly and vehicle |
| CN213243760U (en) * | 2020-08-03 | 2021-05-18 | 安徽威灵汽车部件有限公司 | Oil-cooled motor and vehicle |
| CN111952738A (en) * | 2020-08-27 | 2020-11-17 | 浙江伊控动力系统有限公司 | Alternating-current connection copper bar with auxiliary heat dissipation function for motor controller |
| CN112615466A (en) * | 2020-12-01 | 2021-04-06 | 合肥巨一动力系统有限公司 | Three-phase sealing structure of oil-cooled motor |
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