CN110808659A - Electric drive assembly - Google Patents

Electric drive assembly Download PDF

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Publication number
CN110808659A
CN110808659A CN201911096444.9A CN201911096444A CN110808659A CN 110808659 A CN110808659 A CN 110808659A CN 201911096444 A CN201911096444 A CN 201911096444A CN 110808659 A CN110808659 A CN 110808659A
Authority
CN
China
Prior art keywords
motor
end cover
speed reducer
rear end
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911096444.9A
Other languages
Chinese (zh)
Inventor
何志良
周映双
周荣
龚政
毕望达
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yibin Kai Yi Motor Co Ltd
Yibin Cowin Auto Co Ltd
Original Assignee
Yibin Kai Yi Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yibin Kai Yi Motor Co Ltd filed Critical Yibin Kai Yi Motor Co Ltd
Priority to CN201911096444.9A priority Critical patent/CN110808659A/en
Publication of CN110808659A publication Critical patent/CN110808659A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/19Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Abstract

The invention discloses an electric drive assembly, which comprises a motor, a motor controller and a speed reducer, wherein the motor comprises a stator shell, a stator assembly, a rotor assembly and a motor shaft, the speed reducer comprises a speed reducer shell, an input shaft and a gear set, the motor shaft and the input shaft of the speed reducer are the same hollow shaft, a connecting oil duct communicated with one end of the hollow shaft is arranged in the speed reducer shell, an oil pump is arranged on the speed reducer shell, an outlet of the oil pump is communicated with the connecting oil duct, and the other end of the hollow shaft is communicated with an inner cavity of the speed reducer shell through a stator shell oil duct arranged in the stator shell. The input shaft and the motor shaft of the speed reducer are integrated into a hollow shaft, the NVH performance of the electric drive assembly is improved, the hollow shaft forms an oil passage for cooling, and the cooling effect is good by combining water-cooling circulating cooling, so that the reduction of the demagnetization resistance of the permanent magnet caused by overhigh temperature can be effectively avoided, and the running performance and running stability of the electric drive assembly are ensured.

Description

Electric drive assembly
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an electric drive assembly.
Background
At present, a pure electric drive assembly is developed towards high integration, and a motor, a motor controller and a speed reducer are integrated into a whole. The integrated form has general integration and high integration, and the general connecting finger part monomer is connected through a bolt and can be detached; the highly integrated fingers share the shell and cannot be simply disassembled into separate parts; some of the NVH problems are typically associated with the spline section dimensional machining errors. The integrated electric drive assembly needs to be designed according to a limited size space, and ensures larger output torque, so that the current density of the motor is increased, the stator winding generates heat seriously, and the internal loss of the motor is increased. The rotor temperature rise is intensified synchronously, and the anti-demagnetization capability is reduced.
The cooling form of the motor mainly comprises air cooling, water cooling and oil cooling, and the air-cooled motor is adopted to ensure the heat dissipation capacity, so that the heat dissipation area needs to be increased, the motor is very large in size, and the cooling efficiency is not high. The water cooling motor is provided with a water channel on the motor shell, the water channel is spiral, S-shaped and the like, and heat inside the motor needs to be transferred to the shell through the iron core and then subjected to heat exchange. The water cooling method can effectively cool the core winding, but the cooling of the inner winding is difficult. The oil cooling motor can cool the end part and the interior of the stator winding through the oil duct design, but the oil stirring loss exists in the rotor running process. The motor function density improves, and motor current increases, and the aggravation that generates heat need guarantee better cooling effect, just can guarantee the stability of operation performance and operation.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide an electric drive assembly so as to achieve the purpose of good cooling effect.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
this electric drive assembly, including motor, machine controller and reduction gear, the motor includes stator shell, stator module, rotor subassembly and motor shaft, the reduction gear includes reduction gear housing, input shaft and gear train, the input shaft of motor shaft and reduction gear is same root hollow shaft, be equipped with the connection oil duct that is linked together with the one end of hollow shaft in the reduction gear housing, be equipped with the oil pump on the reduction gear housing, the export of oil pump is linked together with the connection oil duct, the other end of hollow shaft is linked together through the inner chamber of stator shell oil duct and reduction gear housing who establishes in stator shell.
Furthermore, a motor controller water channel is arranged in the motor controller, a stator shell water channel is arranged in the stator shell, and the motor controller water channel is communicated with the stator shell water channel.
And one end of the reducer shell corresponding to the hollow shaft is provided with an end oil passage, and the connecting oil passage is an internal oil passage which is arranged in the reducer shell and used for connecting the end oil passage and an outlet of the oil pump.
And a stator shell water channel and a stator shell oil channel in the stator shell are arranged in parallel.
The motor controller is provided with a motor controller water inlet corresponding to the motor controller water channel, the stator shell is provided with a motor rear end cover, the motor rear end cover is internally provided with an end cover water channel communicated with the stator shell water channel, and the motor rear end cover is provided with a water outlet pipe communicated with the end cover water channel.
And a rear end cover plate is arranged on the outer side of the rear end cover of the motor, and an end cover oil duct for communicating the other end of the hollow shaft with the stator shell oil duct is arranged in the rear end cover of the motor and the rear end cover plate.
And the flow direction of cooling water of the stator shell water channel is opposite to the flow direction of oil in the stator shell oil channel.
The speed reducer casing comprises a speed reducer front end cover and a speed reducer rear end cover which are matched, a speed reducer cavity is formed between the speed reducer front end cover and the speed reducer rear end cover, the speed reducer front end cover is matched with one end of a stator shell, and a motor cavity is formed among the stator shell, the speed reducer front end cover and the motor rear end cover.
Forming an oil circuit circulation in the electric drive assembly, wherein the oil circuit circulation is as follows: oil pump → reducer casing → motor shaft → rear end cap of motor → rear end cap cover → stator housing → cavity of reducer → oil pump.
Forming a waterway circulation in the electric drive assembly, the waterway circulation: the water inlet of the motor controller → the rear end cover of the motor → the stator shell → the water outlet pipe of the rear end cover of the motor.
Compared with the prior art, the invention has the following advantages:
this electric drive assembly structural design is reasonable, integrates into a hollow shaft with reduction gear input shaft and motor shaft, promotes and drives assembly NVH performance, and the hollow shaft forms the oil duct cooling, cools off the rotor, and its cooling effect can effectively avoid the high temperature to lead to the anti demagnetization performance of permanent magnet to descend to guarantee the stability of electric drive assembly operating performance and operation.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic cross-sectional view of an electric drive assembly of the present invention.
In the figure:
1. the structure of the motor comprises a reducer front end cover, 2 reducer rear end covers, 3 oil pumps, 4 differentials, 5 intermediate shaft gear sets, 6 reducer rear end cover oil ducts, 7 motor shafts, 8 input shaft gears, 9 motor controller inlet ports, 10 motor controllers, 11 motor controller water ducts, 12 stator shells, 1201 stator shell water ducts, 1202 stator shell oil ducts, 13 stator cores, 14 stator windings, 15 permanent magnets, 16 rotor cores, 17 rotation transformers, 18 oil seals I and 19 motor rear end covers, 1901 motor rear end cover oil ducts, 20 rear end cover plates, 2001 cover plate oil ducts, 21 water outlet pipes, 22 oil seals II.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in fig. 1, the electric drive assembly includes a motor, a motor controller, and a reducer; the motor includes stator housing 12, stator module, rotor subassembly and motor shaft 7, the reduction gear includes reduction gear housing, input shaft and gear train, the input shaft of motor shaft and reduction gear is same root hollow shaft, be equipped with the connection oil duct that is linked together with the one end of hollow shaft in the reduction gear housing, the last oil pump that is equipped with of reduction gear housing, the export of oil pump 3 is linked together with the connection oil duct, the other end of hollow shaft is linked together through the stator housing oil duct of establishing in stator housing and reduction gear housing's inner chamber.
One end of the reducer shell corresponding to the hollow shaft is provided with an end oil passage, and the connecting oil passage is an internal oil passage which is arranged in the reducer shell and used for connecting the end oil passage and an outlet of the oil pump.
The motor controller is internally provided with a motor controller water channel, the stator shell is internally provided with a stator shell water channel, and the motor controller water channel is communicated with the stator shell water channel. A stator shell water channel and a stator shell oil channel in the stator shell are arranged in parallel; the cooling water flow direction of the stator shell water channel is opposite to the oil flow direction of the stator shell oil channel. The heat is taken away through cooling water by carrying out heat exchange through oil and water in the stator shell.
The motor controller 10 is provided with a motor controller water inlet 9 corresponding to the motor controller water channel, the stator shell is provided with a motor rear end cover 19, the motor rear end cover is internally provided with an end cover water channel communicated with the stator shell water channel, and the motor rear end cover is provided with a water outlet pipe 21 communicated with the end cover water channel.
The reducer casing comprises a reducer front end cover 1 and a reducer rear end cover 2 which are matched, a reducer cavity is formed between the reducer front end cover and the reducer rear end cover, the reducer front end cover is matched with one end of a stator shell, and a motor cavity is formed among the stator shell, the reducer front end cover and the motor rear end cover.
The outer side of the motor rear end cover is provided with a rear end cover plate 20, and an end cover oil passage 2001 for communicating the other end of the hollow shaft with the stator shell oil passage is arranged in the motor rear end cover and the rear end cover plate.
Preferred specific examples are:
a middle shaft gear set 5 and a differential mechanism 4 are arranged in a cavity of the speed reducer, one part of a motor shaft is positioned in the speed reducer, and an input shaft gear 8 connected with the middle shaft gear set is arranged on the part of the motor shaft positioned in the speed reducer; the oil pump 3 is arranged at the bottom of the side face of the rear end cover 2 of the speed reducer, and a speed reducer rear end cover oil duct 6 which is communicated with one end of the hollow shaft and an oil pump outlet is arranged in the rear end cover of the speed reducer.
The motor controller is arranged on a stator shell, and a stator core 13, a stator winding 14, a permanent magnet 15 and a rotor core 16 are arranged in the stator shell; one end of the stator shell is connected with the front end cover 1 of the speed reducer, the other end of the stator shell is connected with the rear end cover 19 of the motor, a rear end cover plate 20 is arranged on the outer side of the rear end cover of the motor, the other end of the hollow shaft of the motor penetrates through the rear end cover of the motor to be located in the rear end cover plate, an oil seal I18 and a rotary transformer 17 which are matched with the outer edge of the hollow shaft are arranged in the rear end cover plate, and an oil seal II 22 is arranged between the.
The motor controller 10 is provided with a motor controller water inlet 9, a motor controller water channel 11 communicated with the motor controller water inlet is arranged in the motor controller, a stator shell water channel 1201 in the stator shell 12 is communicated with the motor controller water channel through a water channel in the motor rear end cover, and a water outlet pipe 21 is arranged on the motor rear end cover.
A cover plate oil passage 2001 is arranged in the rear end cover plate 20, a motor rear end cover oil passage 1901 communicated with the cover plate oil passage and the stator housing oil passage 1202 is arranged in the motor rear end cover 19, one end of the stator housing oil passage is communicated with the reducer cavity, and the other end of the stator housing oil passage is communicated with the motor rear end cover oil passage in the motor rear end cover.
The electric drive assembly is integrated by a single-stage speed reducer, a motor and a motor controller, an oil duct and an oil pump are arranged on the rear end cover of the speed reducer, the input shaft of the speed reducer is not matched with a common integrated spline, the input shaft and a motor shaft are the same shaft (hollow shaft), and partial heat of a rotor is taken away through the oil duct; the motor stator shell is formed by adopting a cold extrusion process, and is provided with a water channel and an oil channel which are independent, the water channel and the oil channel of the motor can exchange heat, and the water circulation can take away the heat of the oil channel; the oil returns to the inside of the speed reducer again after being cooled by the rear end cover and the stator shell, and then forms oil circuit circulation through the oil pump. The waterway circulation is formed by a water inlet of the motor controller, a rear end cover of the motor and a motor shell and is consistent with a cooling loop of the traditional motor.
Forming an oil circuit circulation in the electric drive assembly, wherein the oil circuit circulation is as follows: oil pump → reducer casing → motor shaft → rear end cap of motor → rear end cap cover → stator housing → cavity of reducer → oil pump.
Forming a waterway circulation in the electric drive assembly, wherein the waterway circulation is: the water inlet of the motor controller → the rear end cover of the motor → the stator shell → the water outlet pipe of the rear end cover of the motor.
This electric drive assembly structural design is reasonable, integrates into a hollow shaft with reduction gear input shaft and motor shaft, promotes and drives assembly NVH performance, and the hollow shaft forms the oil duct cooling, combines water-cooling circulative cooling, and its cooling effect is good can effectively avoid the high temperature to lead to the anti demagnetization performance of permanent magnet to descend to guarantee the stability of electric drive assembly operating behavior and operation.
The above-mentioned features are merely for describing preferred embodiments of the present invention and may be arbitrarily combined to form a plurality of embodiments of the present invention.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims (10)

1. The utility model provides an electric drive assembly, includes motor, motor controller and reduction gear, the motor includes stator housing, stator module, rotor subassembly and motor shaft, the reduction gear includes reduction gear casing, input shaft and gear train, its characterized in that: the motor shaft and the input shaft of the speed reducer are the same hollow shaft, a connecting oil duct communicated with one end of the hollow shaft is arranged in the speed reducer shell, an oil pump is arranged on the speed reducer shell, an outlet of the oil pump is communicated with the connecting oil duct, and the other end of the hollow shaft is communicated with an inner cavity of the speed reducer shell through a stator shell oil duct arranged in a stator shell.
2. An electric drive assembly as recited in claim 1, wherein: the motor controller is internally provided with a motor controller water channel, the stator shell is internally provided with a stator shell water channel, and the motor controller water channel is communicated with the stator shell water channel.
3. An electric drive assembly as claimed in claim 1 or 2, wherein: and one end of the reducer shell corresponding to the hollow shaft is provided with an end oil passage, and the connecting oil passage is an internal oil passage which is arranged in the reducer shell and used for connecting the end oil passage and an outlet of the oil pump.
4. An electric drive assembly as recited in claim 2, wherein: and a stator shell water channel and a stator shell oil channel in the stator shell are arranged in parallel.
5. An electric drive assembly as recited in claim 2, wherein: the motor controller is provided with a motor controller water inlet corresponding to the motor controller water channel, the stator shell is provided with a motor rear end cover, the motor rear end cover is internally provided with an end cover water channel communicated with the stator shell water channel, and the motor rear end cover is provided with a water outlet pipe communicated with the end cover water channel.
6. An electric drive assembly as recited in claim 5, wherein: and a rear end cover plate is arranged on the outer side of the rear end cover of the motor, and an end cover oil duct for communicating the other end of the hollow shaft with the stator shell oil duct is arranged in the rear end cover of the motor and the rear end cover plate.
7. An electric drive assembly as recited in claim 5, wherein: and the flow direction of cooling water of the stator shell water channel is opposite to the flow direction of oil in the stator shell oil channel.
8. An electric drive assembly as recited in claim 5, wherein: the speed reducer casing comprises a speed reducer front end cover and a speed reducer rear end cover which are matched, a speed reducer cavity is formed between the speed reducer front end cover and the speed reducer rear end cover, the speed reducer front end cover is matched with one end of a stator shell, and a motor cavity is formed among the stator shell, the speed reducer front end cover and the motor rear end cover.
9. An electric drive assembly as recited in claim 6, wherein: forming an oil circuit circulation in the electric drive assembly, wherein the oil circuit circulation is as follows: oil pump → reducer casing → motor shaft → rear end cap of motor → rear end cap cover → stator housing → cavity of reducer → oil pump.
10. An electric drive assembly as recited in claim 6, wherein: forming a waterway circulation in the electric drive assembly, the waterway circulation: the water inlet of the motor controller → the rear end cover of the motor → the stator shell → the water outlet pipe of the rear end cover of the motor.
CN201911096444.9A 2019-11-11 2019-11-11 Electric drive assembly Pending CN110808659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911096444.9A CN110808659A (en) 2019-11-11 2019-11-11 Electric drive assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911096444.9A CN110808659A (en) 2019-11-11 2019-11-11 Electric drive assembly

Publications (1)

Publication Number Publication Date
CN110808659A true CN110808659A (en) 2020-02-18

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ID=69501953

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911096444.9A Pending CN110808659A (en) 2019-11-11 2019-11-11 Electric drive assembly

Country Status (1)

Country Link
CN (1) CN110808659A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113452202A (en) * 2020-03-26 2021-09-28 上海埃迪特动力技术有限公司 Highly integrated high performance electric drive system power assembly

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1414134A2 (en) * 2002-10-23 2004-04-28 Nissan Motor Co., Ltd. Cooling system for electric motor of vehicle
CN103825404A (en) * 2014-03-25 2014-05-28 北汽大洋电机科技有限公司 Motor and transmission integrated cooling system
DE102015214309A1 (en) * 2015-07-29 2017-02-02 Bayerische Motoren Werke Aktiengesellschaft Hollow shaft cooling for driving an electric vehicle
CN208057908U (en) * 2018-03-01 2018-11-06 上海汽车变速器有限公司 Electric drive assembly lubricating system
CN109038951A (en) * 2018-07-24 2018-12-18 上海大郡动力控制技术有限公司 The cooling structure of new-energy automobile electrical drive power assembly
CN109217541A (en) * 2017-06-30 2019-01-15 奥迪股份公司 motor and motor vehicle
CN110138145A (en) * 2019-06-11 2019-08-16 苏州朗高电机有限公司 A kind of water cooling and the oily cold permanent magnet synchronous motor combined

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1414134A2 (en) * 2002-10-23 2004-04-28 Nissan Motor Co., Ltd. Cooling system for electric motor of vehicle
CN103825404A (en) * 2014-03-25 2014-05-28 北汽大洋电机科技有限公司 Motor and transmission integrated cooling system
DE102015214309A1 (en) * 2015-07-29 2017-02-02 Bayerische Motoren Werke Aktiengesellschaft Hollow shaft cooling for driving an electric vehicle
CN109217541A (en) * 2017-06-30 2019-01-15 奥迪股份公司 motor and motor vehicle
CN208057908U (en) * 2018-03-01 2018-11-06 上海汽车变速器有限公司 Electric drive assembly lubricating system
CN109038951A (en) * 2018-07-24 2018-12-18 上海大郡动力控制技术有限公司 The cooling structure of new-energy automobile electrical drive power assembly
CN110138145A (en) * 2019-06-11 2019-08-16 苏州朗高电机有限公司 A kind of water cooling and the oily cold permanent magnet synchronous motor combined

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113452202A (en) * 2020-03-26 2021-09-28 上海埃迪特动力技术有限公司 Highly integrated high performance electric drive system power assembly

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Application publication date: 20200218