CN117515139A - Dual motor drive assembly with cooling lubrication system - Google Patents

Dual motor drive assembly with cooling lubrication system Download PDF

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Publication number
CN117515139A
CN117515139A CN202311551676.5A CN202311551676A CN117515139A CN 117515139 A CN117515139 A CN 117515139A CN 202311551676 A CN202311551676 A CN 202311551676A CN 117515139 A CN117515139 A CN 117515139A
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CN
China
Prior art keywords
motor
oil
gear
branch
cooling
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
CN202311551676.5A
Other languages
Chinese (zh)
Inventor
朱博铖
兰州
曹超
陈憧
马永学
潘能琴
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.)
Chery Automobile Co Ltd
Original Assignee
Chery Automobile 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 Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to CN202311551676.5A priority Critical patent/CN117515139A/en
Publication of CN117515139A publication Critical patent/CN117515139A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
    • F16H57/0404—Lubricant filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature
    • F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • F16H57/0471—Bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The application provides a double-motor driving assembly with a cooling and lubricating system, which comprises a cooling and lubricating system, a first motor and a second motor, wherein the first motor and the second motor comprise a stator, a rotor, a motor shaft, a bearing and a speed reducing mechanism; the cooling and lubricating system comprises a first driving pump, a second driving pump, a first oil duct and a second oil duct, wherein the first driving pump is used for providing lubricating oil for the first oil duct, the first oil duct is used for cooling and lubricating the first motor, the second driving pump is used for providing lubricating oil for the second oil duct, and the second oil duct is used for cooling and lubricating the second motor; the first oil duct and the second oil duct comprise a plurality of branches, and the branches are respectively used for cooling and lubricating the stator, the rotor, the motor shaft, the bearing and the speed reducing mechanism. Through the arrangement, the lubrication effect of the double-motor driving assembly is improved.

Description

Dual motor drive assembly with cooling lubrication system
Technical Field
The application relates to the technical field of cooling systems, in particular to a double-motor driving assembly with a cooling and lubricating system.
Background
At present, with the rapid development of new energy automobile markets, the requirements on the electric drive assembly in the aspects of integration and high efficiency are higher and higher. In addition to the traditional single motor architecture, dual motor architectures suitable for medium and large vehicles, high performance vehicles and off-road vehicles have also been actively developed in the current market.
The higher the integration of the dual motor drive assembly relative to the single motor drive assembly, wherein the motor and the speed reducer drive assembly are the core components, the higher the demands on the cooling and lubrication system. In the prior art, the motor rotor and the stator of the double-motor driving assembly are forced to be cooled through an internal oil way and an oil pipe, a speed reducer bearing and a gear are lubricated through oil stirring and splashing, so that the lubricating oil flow of two motors is difficult to control independently, different flow requirements of different motor loads are difficult to meet, the lubrication effect is poor easily, and the working efficiency of a cooling lubrication system and the double-motor driving assembly is not improved.
Disclosure of Invention
In view of this, the present application provides a dual motor drive assembly with a cooling lubrication system to enhance the lubrication effect of the dual motor drive assembly.
Specifically, the method comprises the following technical scheme:
the application provides a double-motor driving assembly with a cooling and lubricating system, the double-motor driving assembly comprises a cooling and lubricating system, a first motor and a second motor, wherein the first motor and the second motor comprise a stator, a rotor, a motor shaft and a speed reducing mechanism, the rotor is arranged on the periphery of the motor shaft in a ring mode, the stator is arranged on the periphery of the rotor in a ring mode, the motor shaft is in transmission connection with the speed reducing mechanism, and the motor shaft and the speed reducing mechanism are provided with matched bearings;
the cooling and lubricating system comprises a first driving pump, a second driving pump, a first oil duct and a second oil duct, wherein the first driving pump is used for providing lubricating oil for the first oil duct, the first oil duct is used for cooling and lubricating the first motor, the second driving pump is used for providing lubricating oil for the second oil duct, and the second oil duct is used for cooling and lubricating the second motor;
the first oil duct and the second oil duct comprise a plurality of branches, and the branches are respectively used for cooling and lubricating the stator, the rotor, the motor shaft, the bearing and the speed reducing mechanism.
In an alternative embodiment, the first oil passage and the second oil passage each include a first distribution branch for supplying oil to the stator and a second distribution branch for supplying oil to the reduction mechanism.
In an alternative embodiment, the speed reducing mechanism comprises a first gear pair, a connecting shaft and a second gear pair, wherein the first gear pair comprises a first gear and a second gear which are meshed with each other, the first gear is coaxially connected with the motor shaft, the second gear pair comprises a third gear and a fourth gear which are meshed with each other, and the third gear and the second gear are coaxially connected with the connecting shaft;
the second oil duct comprises a first motor-spanning branch and a second motor-spanning branch, the first motor-spanning branch is used for supplying oil to the third gear of the first motor and/or the bearing matched with the third gear, and the second motor-spanning branch is used for supplying oil to the fourth gear of the first motor and/or the bearing matched with the fourth gear.
In an alternative embodiment, the oil inlet end of the second cross-motor branch is located at the stator of the second motor to receive lubricating oil flowing down the first distribution branch of the second oil passage.
In an alternative embodiment, the first oil passage comprises a third motor-spanning branch for supplying oil to the third gear and/or a bearing of the third gear and a fourth motor-spanning branch for supplying oil to the fourth gear and/or the bearing associated with the fourth gear.
In an alternative embodiment, the oil inlet end of the third cross-motor branch is located at the stator of the first motor to receive lubricating oil flowing down the first distribution branch of the first oil passage.
In an alternative embodiment, the motor shaft comprises a side wall and a hollow cavity formed by surrounding the side wall, a branch oil way is arranged on the side wall, the extending direction of the branch oil way is arranged at an included angle with the axial direction of the motor shaft, and the branch oil way penetrates through the side wall and is communicated with the hollow cavity;
the cooling and lubricating system further comprises a third oil duct, wherein the third oil duct is formed by intersecting the first oil duct and the second oil duct, and the third oil duct is respectively communicated with the hollow cavity of the first motor and the hollow cavity of the second motor so as to supply oil to the rotors of the first motor and the second motor and/or the bearings matched with the motor shaft.
In an alternative embodiment, the third oil passage is further used for supplying oil to the fourth gear and/or the bearing matched with the fourth gear.
In an alternative embodiment, each of said first oil passage and said second oil passage comprises at least one third distribution branch, each of said third distribution branches being adapted to supply oil to at least one of said bearings.
In an alternative embodiment, the cooling and lubrication system further includes a first filter, a first heat exchanger, a second filter, and a second heat exchanger;
the first driving pump, the first filter and the first heat exchanger are sequentially communicated;
the second driving pump, the second filter and the second heat exchanger are sequentially communicated.
The beneficial effects of the technical scheme provided by the embodiment of the application at least comprise: the first driving pump is arranged to provide lubricating oil for the first oil duct, the second driving pump is arranged to provide lubricating oil for the second oil duct, so that the first oil duct cools and lubricates the first motor, and the second oil duct cools and lubricates the second motor, thereby realizing independent oil supply for the first motor and the second motor, meeting different flow requirements of the first motor and the second motor when the loads are different, and reducing the power consumption of the double-motor driving assembly; through setting up many branches to carry out diversified cooling lubrication to stator, rotor, motor shaft, bearing and reduction gears respectively, effectively promote the cooling lubrication effect of bi-motor drive assembly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a cooling and lubrication system for a dual motor drive assembly according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a dual motor drive assembly according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a first oil gallery according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a second oil gallery according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a third oil gallery according to an embodiment of the present application.
Reference numerals in the drawings denote:
11-a first drive pump; 12-a second drive pump; 21-a first oil passage; 211-a first distribution branch; 212-a second distribution branch; 213-a third distribution branch; 214-a third trans-motor branch; 215-fourth motor-across branch; 22-a second oil passage; 221-a first trans-motor branch; 222-a second trans-motor branch; 23-a third oil passage;
100-a first motor; 200-a second motor; 101-a stator; 102-a rotor; 103-a motor shaft; 1031-a hollow cavity; 104-a connecting shaft; 1051-a first gear; 1052-a second gear; 1053-third gear; 1054-fourth gear; 1061—a first bearing; 1062-a second bearing; 1063-third bearing; 1064-fourth bearings; 1065-fifth bearings; 1066-sixth bearings; 1071-a first filter; 1072-a second filter; 1081-a first heat exchanger; 1082-a second heat exchanger; 109-oil tank.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms of orientation, such as "upper," "lower," "side," and the like, in the embodiments of the present application are generally based on the relative relationships of orientations shown in fig. 1, and are used merely to more clearly describe structures and relationships between structures, and are not intended to describe absolute orientations. The orientation may change when the product is placed in different orientations, e.g. "up", "down" may be interchanged.
Unless defined otherwise, all technical terms used in the examples of the present application have the same meaning as commonly understood by one of ordinary skill in the art. Some technical terms appearing in the embodiments of the present application are described below.
In order to make the technical solution and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The embodiment of the application provides a dual motor drive assembly with cooling lubrication system, as shown in fig. 1 and 2, dual motor drive assembly includes cooling lubrication system, first motor 100 and second motor 200 all include stator 101, rotor 102, motor shaft 103 and reduction gears, the periphery of motor shaft 103 is located to the rotor 102 ring, the periphery of rotor 102 is located to the stator 101 ring and set up with rotor 102 interval, motor shaft 103 is connected with the reduction gears transmission, motor shaft 103 and reduction gears all are provided with supporting bearing.
As shown in fig. 1, the cooling and lubrication system includes a first drive pump 11, a second drive pump 12, a first oil passage 21, and a second oil passage 22, the first drive pump 11 is configured to supply lubrication oil to the first oil passage 21, the first oil passage 21 is configured to cool and lubricate the first motor 100, the second drive pump 12 is configured to supply lubrication oil to the second oil passage 22, and the second oil passage 22 is configured to cool and lubricate the second motor 200.
The first oil passage 21 and the second oil passage 22 each include a plurality of branches for cooling and lubricating the stator 101, the rotor 102, the motor shaft 103, the bearing, and the reduction mechanism, respectively.
The branch may be in the form of a pipe, a hole, a groove, or the like, provided in the housing of the dual motor drive assembly, and may be configured to form a defined lubricant flow path.
It will be appreciated that the lubricating oil may also be replaced by other flowable media for cooling or lubrication. The oil product and the filling amount of the lubricating oil are set according to actual requirements, and it is required to ensure that the first driving pump 11 and the second driving pump 12 still can fully suck the lubricating oil under the defined limit inclined posture, so as to avoid uncontrollable influence on the distribution of the lubricating oil caused by sucking air.
Illustratively, solenoid valves are arranged in the first oil duct 21 and the second oil duct 22, and the opening degree of the solenoid valves can be controlled according to working condition requirements and actual temperature values of the stator 101 and the rotor 102 of the motor, so that the flow rate of the distributed lubricating oil to each branch circuit is controlled.
The first motor 100 and the second motor 200 are two motors in a dual motor drive assembly, and the first drive pump 11 and the second drive pump 12 operate independently to provide a clean and demand lubrication oil pressure and flow. The first driving pump 11 outputs lubricating oil to the first oil duct 21 to realize independent cooling and lubrication of the first motor 100, and the second driving pump 12 outputs lubricating oil to the second oil duct 22 to realize independent cooling and lubrication of the second motor 200. And, the lubricating oil of first oil duct 21 and second oil duct 22 can carry out cross lubrication to the spare part in the dual motor drive assembly casing, improves the cooling lubrication effect.
The first motor 100 and the second motor 200 are both installed on the housing of the dual motor driving assembly, and the first motor 100 and the second motor 200 may be symmetrically disposed, for example, as shown in fig. 2, where the first motor 100 and the second motor 200 are symmetrical left and right.
Under the condition that the loads of the first motor 100 and the second motor 200 are different, the cooling and lubrication system provided by the embodiment of the application can output lubricating oil with different flow rates or pressures to the first motor 100 and the second motor 200 through the first driving pump 11 and the second driving pump 12 so as to ensure the cooling and lubrication effect and prevent the reliability and the service life of the double-motor driving assembly from being influenced.
The first oil passage 21 and the second oil passage 22 are respectively formed with a plurality of branches, and can distribute the lubricating oil output by the first driving pump 11 and the second driving pump 12 to different parts according to different paths so as to fully lubricate each part. It will be appreciated that the above "parallel" means that the upstream ends of the multiple branches are connected to each other.
The cooling and lubrication system includes an oil tank 109, and the oil tank 109 is disposed below the first motor 100 and the second motor 200 for collecting lubricating oil for suction by the first drive pump 11 and the second drive pump 12.
According to the dual-motor driving assembly provided by the embodiment of the application, the first driving pump 11 is arranged to provide lubricating oil for the first oil duct 21, the second driving pump 12 is arranged to provide lubricating oil for the second oil duct 22, so that the first oil duct 21 cools and lubricates the first motor 100, and the second oil duct 22 cools and lubricates the second motor 200, thereby realizing independent oil supply for the first motor 100 and the second motor 200, meeting different flow requirements of the first motor 100 and the second motor 200 when loads are different, and reducing power consumption of the dual-motor driving assembly; through setting up many branches to carry out diversified cooling lubrication to stator 101, rotor 102, motor shaft 103, bearing and reduction gears respectively, effectively promote the cooling lubrication effect of bi-motor drive assembly.
In a particular embodiment, the first oil passage 21 and the second oil passage 22 each include a first distribution branch 211 and a second distribution branch 212, the first distribution branch 211 being for supplying oil to the stator 101 and the second distribution branch 212 being for supplying oil to the reduction mechanism.
The first distribution branch 211 of the first oil passage 21 sprays lubricating oil on the stator 101 of the first electric motor 100 to cool and lubricate the stator 101 of the first electric motor 100. The first distribution branch 211 of the second oil passage 22 sprays lubricating oil on the stator 101 of the second motor 200 to cool and lubricate the stator 101 of the second motor 200.
Specifically, as shown in fig. 1 and 3, the lubricating oil in the first distribution branch 211 is sprayed on the surface of the stator 101, then flows to the oil path end ring to the left and right sides of the stator 101, is sprayed from the oil holes of the oil path end ring to the end portions of the windings of the stator 101 to cool the windings, and finally the lubricating oil falls into the oil tank 109.
It will be appreciated that the lubricating oil flowing from the first distribution branch 211, after falling from the surface of the stator 101, may fall on the surfaces of other parts to cool and lubricate the other parts, for example, the motor shaft 103 and its bearings.
In a further embodiment, the reduction mechanism comprises a first gear pair comprising a first gear 1051 and a second gear 1052 intermeshed, the first gear 1051 being coaxially coupled with the motor shaft 103, a connecting shaft 104 and a second gear pair comprising a third gear 1053 and a fourth gear 1054 intermeshed, the third gear 1053 and the second gear 1052 being coaxially coupled with the connecting shaft 104.
Referring to fig. 1 to 3, the lubricating oil flowing out of the second distribution branch 212 is sprayed on the surface of the third gear 1053, and flows to the second gear 1052 along the axial direction of the third gear 1053, so that the first gear 1051, the second gear 1052, the second bearing 1062 and the third bearing 1063 can be cooled and lubricated, and the cooling and lubrication efficiency is improved.
The second oil passage 22 includes a first motor-spanning branch 221 and a second motor-spanning branch 222, the first motor-spanning branch 221 is used for supplying oil to a third gear 1053 of the first motor 100 and/or a bearing matched with the third gear 1053, and the second motor-spanning branch 222 is used for supplying oil to a fourth gear 1054 of the first motor 100 and/or a bearing matched with the fourth gear 1054.
It is understood that a bearing associated with an element means a bearing mounted on the element.
Illustratively, as shown in fig. 2, the motor shaft 103 of the first motor 100 and the motor shaft 103 of the second motor 200 are each mounted with a first bearing 1061 and two second bearings 1062, the first bearing 1061 and the second bearing 1062 being located on both axial sides of the stator 101, respectively, and the two second bearings 1062 being located on both axial sides of the first gear 1051. The second gear 1052 is fitted with a third bearing 1063, the third bearing 1063 being located on the side of the stator 101 of the motor in which it is located. The third gear 1053 is mounted with a fourth bearing 1064, the fourth bearing 1064 being located on a side of the third gear 1053 facing away from the motor in which it is located. The fourth gear 1054 is provided with a fifth bearing 1065 and a sixth bearing 1066, the fifth bearing 1065 and the sixth bearing 1066 are respectively located at two axial sides of the fourth gear 1054, the fifth bearing 1065 is located at one side of the fourth gear 1054 close to the motor, and the sixth bearing 1066 is located at one side of the fourth gear 1054 away from the motor.
The first motor-across branch 221 and the second motor-across branch 222 are both branches of the second oil passage 22, and are each directly or indirectly supplied with oil by the second drive pump 12.
Illustratively, as shown in fig. 4, the oil outlet end of the first motor-spanning branch 221 is close to the positions of the third gear 1053 and the fourth bearing 1064 of the first motor 100, and the lubricating oil flowing out of the first motor-spanning branch 221 is sprayed on the surfaces of the third gear 1053 and the fourth bearing 1064 of the first motor 100 to cool and lubricate the third gear 1053 and the fourth bearing 1064 of the first motor 100. It will be appreciated that during the meshing rotation of the third gear 1053 and the fourth gear 1054, the lubrication oil flowing out of the first cross-motor branch 221 may cool and lubricate the fourth gear 1054, and may also cool and lubricate the fifth bearing 1065 and the sixth bearing 1066.
As shown in fig. 4, the oil outlet end of the second motor-spanning branch 222 is close to the position of the fifth bearing 1065 of the first motor 100, and the lubricating oil flowing out of the second motor-spanning branch 222 is sprayed on the surface of the fifth bearing 1065 of the first motor 100 to cool and lubricate the fifth bearing 1065 of the first motor 100.
In this embodiment, by setting the first motor-spanning branch 221 and the second motor-spanning branch 222, cross lubrication between the first motor 100 and the second motor 200 is achieved, which is beneficial to improving cooling lubrication efficiency and ensuring the overall cooling lubrication effect of the first motor 100 and the second motor 200.
In a further embodiment, the oil inlet end of the second cross-motor leg 222 is located at the stator 101 of the second motor 200 to receive lubricating oil flowing down the first distribution leg 211 of the second oil gallery 22.
As shown in fig. 4, the oil inlet end of the second motor-spanning branch 222 is not connected in parallel with other branches of the second oil passage 22, but is disposed below the oil outlet end of the first distribution branch 211 of the second oil passage 22, and the lubricating oil flowing out of the first distribution branch 211 drops down after cooling the windings of the stator 101 and flows into the oil inlet end of the second motor-spanning branch 222, and then is sprayed at the fifth bearing 1065 of the first motor 100 to cool and lubricate the fifth bearing 1065.
In this embodiment, by disposing the oil inlet end of the second across-motor branch 222 at the stator 101 of the second motor 200, the lubrication oil of the second oil passage 22 can be fully utilized, the utilization rate of the lubrication oil can be improved, and the cooling lubrication effect on the dual-motor drive assembly can be improved.
In a further embodiment, first oil gallery 21 includes a third motor-spanning branch 214 and a fourth motor-spanning branch 215, third motor-spanning branch 214 for supplying oil to third gear 1053 and/or a bearing associated with third gear 1053, and fourth motor-spanning branch 215 for supplying oil to fourth gear 1054 and/or a bearing associated with fourth gear 1054.
The third motor-across branch 214 and the fourth motor-across branch 215 are both branches of the first oil passage 21, and are each directly or indirectly supplied with oil by the first drive pump 11.
Illustratively, as shown in fig. 3, the oil outlet end of the third motor-spanning branch 214 is close to the position of the fourth bearing 1064 of the second motor 200, and the lubricating oil flowing out of the first motor-spanning branch 221 is sprayed on the surface of the fourth bearing 1064 of the first motor 100 to cool and lubricate the fourth bearing 1064 of the first motor 100. It will be appreciated that the lubrication oil flowing from third cross-motor branch 214 may also be sprayed at third gear 1053 of second motor 200 to provide cooling lubrication to fourth gear 1054, and also to fifth bearing 1065 and sixth bearing 1066 during the meshing rotation of third gear 1053 and fourth gear 1054.
Illustratively, as shown in fig. 3, the fourth motor-spanning branch 215 is located near the fifth bearing 1065 of the second motor 200, and the lubricating oil flowing out of the second motor-spanning branch 222 is sprayed on the surface of the fifth bearing 1065 of the first motor 100 to cool and lubricate the fifth bearing 1065 of the first motor 100.
In this embodiment, by providing third motor-spanning branch 214 and fourth motor-spanning branch 215, cross lubrication between first motor 100 and second motor 200 is realized, which is beneficial to improving cooling lubrication efficiency and ensuring overall cooling lubrication effect of first motor 100 and second motor 200.
In a further embodiment, the oil inlet end of the third cross-motor branch 214 is located at the stator 101 of the first motor 100 to receive lubricating oil flowing down the first distribution branch 211 of the first oil passage 21.
As shown in fig. 3, the oil inlet end of the third motor-across branch 214 is not connected in parallel with the other branches of the first oil passage 21, but is disposed below the oil outlet end of the first distribution branch 211 of the first oil passage 21, and the lubricating oil flowing out of the first distribution branch 211 drops down after cooling the windings of the stator 101 and flows into the oil inlet end of the third motor-across branch 214, and then is sprayed at the fourth bearing 1064 of the second motor 200 to cool and lubricate the fourth bearing 1064.
In this embodiment, by disposing the oil inlet end of the third motor-spanning branch 214 at the stator 101 of the first motor 100, the lubrication oil of the first oil passage 21 can be fully utilized, the utilization rate of the lubrication oil can be improved, and the cooling lubrication effect on the dual-motor drive assembly can be improved.
In a further embodiment, the motor shaft 103 includes a side wall and a hollow cavity 1031 surrounded by the side wall, the side wall is provided with a branched oil path, the extending direction of the branched oil path is set at an included angle with the axial direction of the motor shaft 103, and the branched oil path penetrates through the side wall and is communicated with the hollow cavity 1031.
The cooling and lubrication system further includes a third oil passage 23, where the third oil passage 23 is formed by intersecting the first oil passage 21 and the second oil passage 22, and the third oil passage 23 is respectively communicated with the hollow cavity 1031 of the first motor 100 and the hollow cavity 1031 of the second motor 200, so as to supply oil to the rotors 102 of the first motor 100 and the second motor 200 and/or the bearings matched with the motor shaft 103.
Specifically, the lubricating oil of the third oil passage 23 originates from the first and second drive pumps 11 and 12, and the first and second oil passages 21 and 22 meet to form the third oil passage 23.
The hollow cavity 1031 extends along the axial direction of the motor shaft 103, one or more branch oil paths are provided, and the oil outlet end of at least one branch oil path is positioned at the rotor 102. The lubricating oil flowing out of the third oil passage 23 flows to the motor shaft 103 of the first motor 100 and the motor shaft 103 of the second motor 200, flows into the hollow cavity 1031 from one end of the motor shaft 103, and flows to the rotor 102 through the branch oil passage, cooling and lubricating the rotor 102.
The branch oil passage may extend in the radial direction of the motor shaft 103, and may also extend in a direction inclined to the axial direction of the motor shaft 103. Illustratively, the extending direction of the branch oil paths is inclined with the axial direction of the motor shaft 103, and the number of the branch oil paths is plural, and the oil outlet end of at least one branch oil path is located at the second bearing 1062 to cool and lubricate the second bearing 1062, so as to improve the cooling and lubrication efficiency of the third oil path 23.
In a further embodiment, the third oil gallery 23 is also used to supply oil to the fourth gear 1054 and/or bearings associated with the fourth gear 1054.
As shown in fig. 5, the third oil passage 23 has four oil outlets, two of which are located at the motor shaft 103 of the first motor 100 and the motor shaft 103 of the second motor 200, respectively, and the other two oil outlets are located at the sixth bearing 1066 of the first motor 100 and the sixth bearing 1066 of the second motor 200, respectively, so as to lubricate the sixth bearing 1066 of the first motor 100 and the sixth bearing 1066 of the second motor 200 at the same time, and make full use of the lubricating oil of the third oil passage 23, thereby contributing to improving cooling and lubrication efficiency.
In one embodiment, the first oil passage 21 and the second oil passage 22 each include at least one third distribution branch 213, each third distribution branch 213 being for supplying oil to at least one bearing.
Illustratively, as shown in fig. 1, the first oil passage 21 includes two third distribution branches 213, wherein one third distribution branch 213 is used for forcibly supplying oil to the third bearing 1063 of the first electric machine 100, and the other third distribution branch 213 is used for forcibly supplying oil to the first bearing 1061 of the first electric machine 100 to ensure the cooling and lubrication effects of the third bearing 1063 and the first bearing 1061.
Illustratively, as shown in fig. 1, the second oil passage 22 includes two third distribution branches 213, one of the third distribution branches 213 being for forcibly supplying oil to the first bearing 1061 of the second electric motor 200. The other third distribution branch 213 is communicated with a branch oil path of the motor shaft 103 of the second motor 200, and an oil outlet end of the third distribution branch 213 is positioned at a third bearing 1063 of the second motor 200, the third oil duct 23 flows into the lubricating oil in the hollow cavity 1031 of the second motor 200, flows into the third distribution branch 213 through the branch oil path, flows out of the third distribution branch 213, is sprayed at the third bearing 1063 of the second motor 200, and cools and lubricates the third bearing 1063.
The cooling and lubrication system also includes a first filter 1071, a first heat exchanger 1081, a second filter 1072, and a second heat exchanger 1082. The first drive pump 11, the first filter 1071, and the first heat exchanger 1081 are sequentially communicated. The second drive pump 12, the second filter 1072, and the second heat exchanger 1082 are sequentially communicated.
The lubricating oil flowing out from the first drive pump 11 flows through the first filter 1071 and the first heat exchanger 1081, flows out downstream of the first heat exchanger 1081, and branches off to form the first oil passage 21. The lubricating oil flowing out from the second drive pump 12 flows through the second filter 1072 and the second heat exchanger 1082, and flows out in a plurality of branches downstream of the second heat exchanger 1082, forming the second oil passage 22.
The first filter 1071 and the second filter 1072 are used to remove harmful impurities in the lubricant pumped by the first driving pump 11, and provide clean lubricant for the first motor 100 and the second motor 200.
The first heat exchanger 1081 and the second heat exchanger 1082 are used for cooling the lubricating oil flowing out from the first filter 1071 and the second filter 1072, so as to ensure the cooling effect on the first motor 100 and the second motor 200 and avoid the influence on the normal operation of the parts in the first motor 100 and the second motor 200 due to overheat.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the present application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. The specification and examples are to be regarded in an illustrative manner only.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. The double-motor driving assembly with the cooling and lubricating system is characterized by comprising a cooling and lubricating system, a first motor (100) and a second motor (200), wherein the first motor (100) and the second motor (200) comprise a stator (101), a rotor (102), a motor shaft (103) and a speed reducing mechanism, the rotor (102) is annularly arranged on the periphery of the motor shaft (103), the stator (101) is annularly arranged on the periphery of the rotor (102), the motor shaft (103) is in transmission connection with the speed reducing mechanism, and the motor shaft (103) and the speed reducing mechanism are provided with matched bearings;
the cooling and lubricating system comprises a first driving pump (11), a second driving pump (12), a first oil duct (21) and a second oil duct (22), wherein the first driving pump (11) is used for providing lubricating oil for the first oil duct (21), the first oil duct (21) is used for cooling and lubricating the first motor (100), the second driving pump (12) is used for providing lubricating oil for the second oil duct (22), and the second oil duct (22) is used for cooling and lubricating the second motor (200);
the first oil duct (21) and the second oil duct (22) comprise a plurality of branches, and the branches are respectively used for cooling and lubricating the stator (101), the rotor (102), the motor shaft (103), the bearing and the speed reducing mechanism.
2. The dual motor drive assembly of claim 1, wherein the first oil passage (21) and the second oil passage (22) each include a first distribution branch (211) and a second distribution branch (212), the first distribution branch (211) being for supplying oil to the stator (101), the second distribution branch (212) being for supplying oil to the reduction mechanism.
3. The dual motor drive assembly of claim 2, wherein the reduction mechanism comprises a first gear pair, a connecting shaft (104), and a second gear pair, the first gear pair comprising a first gear (1051) and a second gear (1052) that intermesh, the first gear (1051) being coaxially connected with the motor shaft (103), the second gear pair comprising a third gear (1053) and a fourth gear (1054) that intermesh, the third gear (1053) and the second gear (1052) being coaxially connected to the connecting shaft (104);
the second oil duct (22) comprises a first motor-spanning branch (221) and a second motor-spanning branch (222), the first motor-spanning branch (221) is used for supplying oil to the third gear (1053) of the first motor (100) and/or the bearing matched with the third gear (1053), and the second motor-spanning branch (222) is used for supplying oil to the fourth gear (1054) of the first motor (100) and/or the bearing matched with the fourth gear (1054).
4. A dual motor drive assembly according to claim 3, wherein the oil inlet end of the second cross motor branch (222) is located at the stator (101) of the second motor (200) to receive lubricating oil flowing down the first distribution branch (211) of the second oil gallery (22).
5. A dual motor drive assembly according to claim 3, characterized in that the first oil passage (21) comprises a third motor-spanning branch (214) and a fourth motor-spanning branch (215), the third motor-spanning branch (214) being intended to supply oil to the third gear (1053) and/or to the bearings of the third gear (1053), the fourth motor-spanning branch (215) being intended to supply oil to the fourth gear (1054) and/or to the bearings associated with the fourth gear (1054).
6. The dual motor drive assembly of claim 5, wherein an oil inlet end of the third cross-motor branch (214) is located at the stator (101) of the first motor (100) to receive lubricating oil flowing down the first distribution branch (211) of the first oil gallery (21).
7. A dual motor drive assembly according to claim 3, wherein the motor shaft (103) comprises a side wall and a hollow cavity (1031) formed by surrounding the side wall, a branch oil path is arranged on the side wall, the extending direction of the branch oil path is arranged at an included angle with the axial direction of the motor shaft (103), and the branch oil path penetrates through the side wall and is communicated with the hollow cavity (1031);
the cooling and lubricating system further comprises a third oil duct, the third oil duct is formed by the intersection of the first oil duct (21) and the second oil duct (22), and the third oil duct is respectively communicated with the hollow cavity (1031) of the first motor (100) and the hollow cavity (1031) of the second motor (200), so that oil is supplied to the rotor (102) of the first motor (100) and the second motor (200) and/or the bearing matched with the motor shaft (103).
8. The dual motor drive assembly of claim 7, wherein the third oil gallery is further configured to supply oil to the fourth gear (1054) and/or the bearing associated with the fourth gear (1054).
9. A dual motor drive assembly according to claim 1, wherein the first oil passage (21) and the second oil passage (22) each comprise at least one third distribution branch (213), each third distribution branch (213) being intended to supply oil to at least one of the bearings.
10. The dual motor drive assembly of claim 1, wherein the cooling lubrication system further comprises a first filter (1071), a first heat exchanger (1081), a second filter (1072), and a second heat exchanger (1082);
the first driving pump (11), the first filter (1071) and the first heat exchanger (1081) are sequentially communicated;
the second drive pump (12), the second filter (1072), and the second heat exchanger (1082) are sequentially communicated.
CN202311551676.5A 2023-11-17 2023-11-17 Dual motor drive assembly with cooling lubrication system Pending CN117515139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311551676.5A CN117515139A (en) 2023-11-17 2023-11-17 Dual motor drive assembly with cooling lubrication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311551676.5A CN117515139A (en) 2023-11-17 2023-11-17 Dual motor drive assembly with cooling lubrication system

Publications (1)

Publication Number Publication Date
CN117515139A true CN117515139A (en) 2024-02-06

Family

ID=89760438

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311551676.5A Pending CN117515139A (en) 2023-11-17 2023-11-17 Dual motor drive assembly with cooling lubrication system

Country Status (1)

Country Link
CN (1) CN117515139A (en)

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