CN118128889A - Electric drive motor unit - Google Patents

Electric drive motor unit Download PDF

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Publication number
CN118128889A
CN118128889A CN202410169792.9A CN202410169792A CN118128889A CN 118128889 A CN118128889 A CN 118128889A CN 202410169792 A CN202410169792 A CN 202410169792A CN 118128889 A CN118128889 A CN 118128889A
Authority
CN
China
Prior art keywords
shaft
differential
storage area
liquid storage
motor
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
CN202410169792.9A
Other languages
Chinese (zh)
Inventor
赵超
余伟苗
黄和涨
李晓天
苏志成
徐俊
赵艳峰
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.)
Shanghai GKN Huayu Driveline Systems Co Ltd
Original Assignee
Shanghai GKN Huayu Driveline Systems 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 Shanghai GKN Huayu Driveline Systems Co Ltd filed Critical Shanghai GKN Huayu Driveline Systems Co Ltd
Priority to CN202410169792.9A priority Critical patent/CN118128889A/en
Publication of CN118128889A publication Critical patent/CN118128889A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/037Gearboxes for accommodating differential gearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0434Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0436Pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0467Elements of gearings to be lubricated, cooled or heated
    • F16H57/0476Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to the technical field of electric automobiles, in particular to an electric drive motor unit, which mainly comprises a motor shaft, an intermediate shaft and a differential shaft which extend in parallel along the horizontal direction, wherein the extending direction of a connecting line of the motor shaft and the differential shaft is the horizontal direction or is close to the horizontal direction, the intermediate shaft is positioned above the connecting line of the motor shaft and the differential shaft, a main liquid storage area and an independent liquid storage area for storing lubricating liquid are formed in an area below the motor shaft and the differential shaft in a housing space, the independent liquid storage area and the main liquid storage area are mutually separated through a division bar and are communicated through an opening formed in the division bar, the independent liquid storage area is positioned below the differential, a pump is arranged in the main liquid storage area, and the pump supplies the lubricating liquid in the main liquid storage area to a drive motor, a speed reducer and the independent liquid storage area through a lubricating liquid pipeline. The stirring of the intermediate shaft gear to the lubricating liquid is avoided, the energy loss of the motor unit is reduced, the size of the motor unit in the vertical direction is reduced, and the arrangement of the motor unit on the whole vehicle is facilitated.

Description

Electric drive motor unit
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an electric drive motor unit.
Background
The motor unit applied to the electric automobile mainly comprises a motor and a reduction gearbox, wherein the motor and the reduction gearbox share lubricating cooling liquid (hereinafter referred to as lubricating liquid). The stator and the rotor of the motor are directly cooled by adopting the lubricating liquid of the reduction gearbox, so that the cooling efficiency can be obviously improved, the running temperature of the motor can be reduced, and the technology is widely applied in recent years.
The motor unit applied to the electric vehicle should have a small external dimension and should have as little energy loss as possible during the power transmission. The energy loss of the motor unit comes mostly from the agitation of the lubricating fluid as the reduction gearbox gears rotate. The motor which directly cools the stator and the rotor by using the lubricating liquid can cause larger energy loss due to the violent stirring of the lubricating liquid by the rotor if a large amount of the lubricating liquid enters an air gap between the rotor and the stator during operation.
The invention patent application of publication number CN109563920a discloses a motor unit having: a motor having a rotor that rotates around a motor axis; a reduction gear connected to the motor and having an intermediate gear that rotates about an intermediate axis; a differential device connected to the reduction gear and having a ring gear that rotates about a differential axis; a housing provided with a housing space for housing the motor and the differential device; oil accumulated in a region on the lower side in the vertical direction of the storage space; and an oil passage that guides oil from a region on the lower side in the vertical direction of the storage space and supplies the oil to the motor, wherein at least a part of the ring gear is located below the liquid surface of the oil stored in the region on the lower side in the vertical direction of the storage space, the motor axis, the intermediate axis, and the differential axis extend parallel to each other in the horizontal direction, and the intermediate axis and the differential axis are located on the lower side with respect to the motor axis, and when viewed in the axial direction of the motor axis, the 1 st line segment is a line segment that virtually connects the motor axis and the intermediate axis, the 2 nd line segment is a line segment that virtually connects the intermediate axis and the differential axis, and the 1 st line segment extends in the substantially vertical direction, and the 2 nd line segment extends in the substantially horizontal direction. The motor unit is characterized in that an input shaft of a reduction gearbox (reduction gear) and a rotor shaft of an electric motor (motor) are on the same straight line and are positioned above a connecting line of a differential shaft (differential axis) and an intermediate shaft (intermediate axis). The advantage of this arrangement is that the level of the lubricating fluid in the motor unit is lower than the lowest position of the air gap between the stator and the rotor of the motor, avoiding that the lubricating fluid enters the air gap between the stator and the rotor of the motor. However, in such an arrangement, the intermediate shaft is positioned below the reduction gearbox, and the large gear on the intermediate shaft is immersed into the lubricating liquid to a large depth. Because the rotational speed of the intermediate shaft is high, the agitation of the lubricating fluid by the intermediate shaft causes a large energy loss. Although the motor unit is provided with the liquid storage area above the reduction gearbox, part of lubricating liquid enters the liquid storage area after being stirred up by the gears, so that the height of the liquid level of the lubricating liquid in the reduction gearbox is reduced, the reduction of the liquid level of the lubricating liquid by the method is limited, and the energy loss caused by stirring the gears of the intermediate shaft cannot be thoroughly eliminated. Meanwhile, the motor unit is large in size in the vertical direction because the axis position of the motor is far higher than that of the differential mechanism, and the arrangement of the motor unit on a vehicle is not facilitated.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an electric drive motor unit that reduces energy losses and facilitates the arrangement of the motor unit on the whole vehicle.
In order to solve the technical problems, the invention adopts the following technical scheme:
the present invention provides an electric drive motor unit comprising: a driving motor having a motor shaft outputting torque; the speed reducer is provided with an intermediate shaft for transmitting torque, and the intermediate shaft is connected with a motor shaft through gear transmission; the differential mechanism is provided with a differential shaft for transmitting torque, and the differential shaft is connected with the intermediate shaft through gear transmission; a housing having a housing space housing the drive motor, the speed reducer, and the differential; the motor shaft, the intermediate shaft and the differential shaft extend in parallel with each other in the horizontal direction; the extending direction of the connecting line of the motor shaft and the differential shaft is horizontal or near horizontal, the intermediate shaft is positioned above the connecting line of the motor shaft and the differential shaft, the storage space of the shell is positioned in the area below the motor shaft and the differential shaft to form a main liquid storage area and an independent liquid storage area for storing lubricating liquid, the independent liquid storage area and the main liquid storage area are mutually separated through a division bar and are communicated through an opening formed in the division bar, the independent liquid storage area is positioned below the differential mechanism, a pump is arranged in the main liquid storage area, and the pump supplies the lubricating liquid in the main liquid storage area to the driving motor, the speed reducer and the independent liquid storage area through a lubricating liquid pipeline.
Preferably, the differential has a differential gear disposed on the differential shaft, and the division bar is disposed below the differential gear.
Preferably, one end of the parting bead is connected with the bottom of the housing and the other end extends upwards, and the parting bead and a part of the housing located below the differential gear together form a separate liquid storage area with the differential gear.
Preferably, the division bar is in the shape of a circular arc extending along the outer circumference of the differential gear.
Preferably, the pump is provided in the lower part of the main reservoir.
Compared with the prior art, the invention has obvious progress:
According to the electric drive motor unit, the extending direction of the connecting line of the motor shaft and the differential shaft is set to be the horizontal direction or close to the horizontal direction, so that the size of the motor unit in the vertical direction is reduced, and the arrangement of the motor unit on the whole vehicle is facilitated; the intermediate shaft is positioned above the connecting line of the motor shaft and the differential shaft, and the main liquid storage area and the independent liquid storage area are positioned below the motor shaft and the differential shaft, so that stirring of lubricating liquid by the intermediate shaft gear is avoided, and energy loss of the motor unit is reduced; a pump is arranged in the main liquid storage area, and the pump directionally conveys lubricating liquid to the cooling and lubricating positions of the driving motor and the speed reducer, so that the total amount of the lubricating liquid required by the motor unit is greatly reduced; the bearings at the two ends of the differential mechanism can lubricate in an oil stirring mode that the differential mechanism gears rotate to stir up the lubricating liquid in the independent liquid storage area, and the design of a lubricating liquid flow passage in the motor unit shell can be simplified.
Drawings
Fig. 1 is a schematic view of the horizontal arrangement of an electric drive motor unit of an embodiment of the present invention.
Fig. 2 is a schematic illustration of the level of lubricating fluid in a horizontal arrangement of an electric drive motor unit in accordance with an embodiment of the present invention.
FIG. 3 is a schematic illustration of the fluid level of an electric drive motor unit of an embodiment of the present invention when the motor shaft axis is below the differential shaft axis.
Fig. 4 is a schematic illustration of the fluid level of the electric drive motor unit of an embodiment of the present invention when the motor shaft axis is higher than the differential shaft axis.
Wherein reference numerals are as follows:
1. Driving motor
10. Motor shaft
2. Speed reducer
20. Intermediate shaft
3. Differential mechanism
30. Differential shaft
31. Differential gear
4. Shell body
40. Storage space
5. Main liquid storage area
6. Separate liquid storage area
7. Division bar
8. An opening
9. Pump with a pump body
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1 to 4, one embodiment of the electric drive motor unit of the present invention.
Referring to fig. 1 and 2, the electric drive motor unit of the present embodiment includes a drive motor 1, a reduction gear 2, a differential 3, and a housing 4.
The driving motor 1 is provided with a motor shaft 10 for outputting torque, the driving motor 1 is also provided with a motor rotor fixedly connected with the motor shaft 10 and a motor stator positioned on the outer peripheral side of the motor rotor, and the motor rotor rotates relative to the motor stator to drive the motor shaft 10 to rotate when the driving motor 1 works, so as to output rotating torque.
The speed reducer 2 is provided with an intermediate shaft 20 for transmitting torque, the intermediate shaft 20 is connected with the motor shaft 10 through gear transmission, specifically, an input shaft of the speed reducer is fixedly connected with the motor shaft 10 coaxially, a first gear is arranged on the input shaft of the speed reducer, and the first gear is meshed with a second gear fixedly arranged on the intermediate shaft 20 to form first-stage gear transmission of the speed reducer 2.
The differential 3 has a differential shaft 30 for transmitting torque, and the differential shaft 30 is connected with the intermediate shaft 20 through a gear transmission, specifically, the differential 3 has a differential gear 31 fixedly arranged on the differential shaft 30, and a third gear is fixedly arranged on the intermediate shaft 20 of the speed reducer 2, and the third gear is meshed with the differential gear 31 to form a second-stage gear transmission of the speed reducer 2. Thereby, the speed reducer 2 transmits the torque output from the motor shaft 10 of the drive motor 1 to the differential 3, and the differential shaft 30 of the differential 3 continuously transmits the torque to the wheels of the vehicle.
The housing 4 has a housing space 40 that houses the drive motor 1, the reduction gear 2, and the differential gear 3, and the drive motor 1, the reduction gear 2, and the differential gear 3 are housed in the housing space 40 of the housing 4, with the motor shaft 10, the intermediate shaft 20, and the differential shaft 30 extending parallel to each other in the horizontal direction.
In the electric drive motor unit of the present embodiment, the extending direction of the connecting line of the motor shaft 10 and the differential shaft 30 is the horizontal direction or the nearly horizontal direction, wherein the nearly horizontal direction is the direction having a small angle with the horizontal direction, preferably within ±10° with respect to the horizontal direction. The intermediate shaft 20 is located above the line connecting the motor shaft 10 and the differential shaft 30.
The housing space 40 of the housing 4 is formed with a main reservoir 5 and an individual reservoir 6 in a region below the motor shaft 10 and the differential shaft 30, and the main reservoir 5 and the individual reservoir 6 are used for storing a lubricating fluid, which is not limited to, but may be, for example, oil. The independent liquid storage area 6 and the main liquid storage area 5 are mutually separated through a parting bead 7, and an opening 8 is formed in the parting bead 7, so that the independent liquid storage area 6 and the main liquid storage area 5 are communicated through the opening 8 formed in the parting bead 7.
The separate liquid storage area 6 is located below the differential 3 so that the lower portion of the differential gear 31 of the differential 3 can be immersed in the lubricating liquid stored in the separate liquid storage area 6.
Preferably, the parting bead 7 is arranged below the differential gear 31, further, one end of the parting bead 7 is connected with the bottom of the shell 4, the other end of the parting bead 7 extends upwards, and the parting bead 7 and the part of the shell 4 below the differential gear 31 form a separate liquid storage area 6 together with the differential gear 31, thereby forming the separate liquid storage area 6 separated from the main liquid storage area 5 below the differential gear 3, and ensuring that the lower part of the differential gear 31 can be immersed in lubricating liquid stored in the separate liquid storage area 6.
Preferably, the parting bead 7 is in a circular arc shape extending along the periphery of the differential gear 31, the parting bead 7 extends in a circular arc shape around the periphery of the differential gear 31, so that a separate liquid storage area 6 surrounding the differential gear 31 can be formed, and the lower part of the differential gear 31 is further ensured to be immersed in the lubricating liquid stored in the separate liquid storage area 6.
A pump 9 is provided in the main reservoir 5, preferably the pump 9 is provided in the lower part of the main reservoir 5. The pump 9 supplies the lubricating liquid accumulated in the main liquid reservoir 5 to the drive motor 1, the decelerator 2 and the individual liquid reservoir 6 through the lubricating liquid pipe.
In the electric drive motor unit of the present embodiment, the pump 9 sucks the lubricating liquid stored in the main liquid storage area 5, and the lubricating liquid is supplied to the motor stator of the drive motor 1, the motor rotor, the bearings at both ends of the input shaft of the reduction gear 2, the bearings at both ends of the intermediate shaft 20, the first-stage gear engagement area (first gear and second gear engagement area), the second-stage gear engagement area (third gear and differential gear 31 engagement area), and the separate liquid storage area 6 through the lubricating liquid pipe arranged in the housing 4, and the lubricating liquid naturally flows back to the main liquid storage area 5 and the separate liquid storage area 6 by the action of gravity after passing through the cooling and lubricating areas. The bearings at the two ends of the differential shaft 30 are rotated by the differential gear 31 to stir up the lubricating liquid in the independent liquid storage area 6 for lubrication, and the stirred lubricating liquid naturally flows back to the main liquid storage area 5 and the independent liquid storage area 6 under the action of gravity after passing through the bearings at the two ends of the differential shaft 30.
Referring to fig. 2, in the horizontally arranged state of the electric drive motor unit of this embodiment, the liquid level of the lubricating fluid in the main liquid storage area 5 and the liquid level of the lubricating fluid in the individual liquid storage area 6 are flush due to the communicating action of the opening 8 on the partition 7, and are both located on the liquid level a.
When the vehicle is on a grade, the connection of the motor shaft 10 and the differential shaft 30 will be inclined.
Referring to fig. 3, when the axis of the motor shaft 10 is lower than the axis of the differential shaft 30, after the lubrication fluid in the main reservoir 5 is sucked by the pump 9, the remaining lubrication fluid level b is lower than the lowest level of the air gap between the motor stator and the motor rotor. Meanwhile, due to the action of the parting bead 7, the liquid level c of the lubricating liquid in the independent liquid storage area 6 is higher than the liquid level b of the lubricating liquid in the main liquid storage area 5, and at the moment, the differential gear 31 can still stir enough lubricating liquid to lubricate the bearings at the two ends of the differential shaft 30.
Referring to fig. 4, when the axis of the motor shaft 10 is higher than the axis of the differential shaft 30, the remaining level d of the lubricating fluid in the main fluid reservoir 5 can be lower than the lowest level of the air gap between the motor stator and the motor rotor after the lubricating fluid in the main fluid reservoir 5 is sucked by the pump 9 due to the action of gravity, and the level d of the lubricating fluid in the main fluid reservoir 5 should be higher than the level of the fluid suction port of the pump 9 at this time when the axis of the motor shaft 10 is lower than the axis of the differential shaft 30, so as to ensure that the pump 9 can continuously and reliably suck the lubricating fluid in the main fluid reservoir 5, thereby avoiding the noise caused by the air suction. Simultaneously, the lubricating liquid in the independent liquid storage area 6 can flow into the main liquid storage area 5 through the upper opening 8 of the parting bead 7, so that the phenomenon that the pump 9 is empty due to the fact that the liquid level of the lubricating liquid in the main liquid storage area 5 is too low is avoided. In this state, the lubricating fluid level e in the separate fluid storage area 6 is high, but since the rotational speed of the differential gear 31 is far lower than that of the intermediate shaft 20, the oil stirring energy loss due to the lubricating fluid level angle is not significant.
In summary, the electric drive motor unit of the present embodiment has the following advantages:
(1) The extending direction of the connecting line of the motor shaft 10 and the differential shaft 30 is the horizontal direction or the nearly horizontal direction, which reduces the size of the motor unit in the vertical direction and facilitates the arrangement of the motor unit on the whole vehicle.
(2) The intermediate shaft 20 is located above the connection line of the motor shaft 10 and the differential shaft 30, and the main liquid storage area 5 and the individual liquid storage area 6 are both located below the motor shaft 10 and the differential shaft 30, so that stirring of lubricating liquid by the intermediate shaft gear is avoided, and energy loss of the motor unit is reduced.
(3) The main liquid storage area 5 is internally provided with a pump 9, and the pump 9 directionally conveys lubricating liquid to the motor stator, the motor rotor, bearings at two ends of an input shaft of a speed reducer, bearings at two ends of an intermediate shaft 20, a two-stage gear meshing area and the like, so that the total amount of the lubricating liquid required by a motor unit is greatly reduced.
(4) When the unit of the motor is in different inclination directions and inclination angles, the liquid level of the lubricating liquid in the main liquid storage area 5 is lower than the lowest position of an air gap between the motor stator and the motor rotor in the working state, so that the energy loss caused by stirring the lubricating liquid by the motor rotor is avoided.
(5) The unit of motor is under different inclination and inclination, and the lubrication liquid level in the independent liquid storage area 6 can satisfy the lubrication liquid level height that the normal stirring lubrication of differential mechanism axle 30 both ends bearing needs all the time.
(6) The bearings at both ends of the differential shaft 30 are lubricated by stirring, so that the design of the lubrication fluid flow passage in the motor unit housing 4 can be simplified.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims (5)

1. An electric drive motor unit comprising:
a drive motor (1) having a motor shaft (10) outputting torque;
A speed reducer (2) provided with an intermediate shaft (20) for transmitting torque, wherein the intermediate shaft (20) is connected with the motor shaft (10) through a gear transmission;
a differential (3) having a differential shaft (30) for transmitting torque, the differential shaft (30) being in geared connection with the intermediate shaft (20);
a housing (4) having a housing space (40) in which the drive motor (1), the reduction gear (2), and the differential (3) are housed;
The motor shaft (10), the intermediate shaft (20) and the differential shaft (30) extend parallel to each other in the horizontal direction; it is characterized in that the method comprises the steps of,
The motor shaft (10) and the extending direction of the connecting line of the differential shaft (30) are horizontal or near the horizontal, the intermediate shaft (20) is located above the connecting line of the motor shaft (10) and the differential shaft (30), the containing space (40) of the shell (4) is located in the area below the motor shaft (10) and the differential shaft (30), a main liquid storage area (5) and an independent liquid storage area (6) for storing lubricating liquid are formed, the independent liquid storage area (6) is communicated with the main liquid storage area (5) through a parting bead (7) and an opening (8) formed in the parting bead (7), the independent liquid storage area (6) is located below the differential mechanism (3), a pump (9) is arranged in the main liquid storage area (5), and the lubricating liquid in the main liquid storage area (5) is supplied to the driving motor (1), the speed reducer (2) and the independent liquid storage area (6) through lubricating liquid pipelines.
2. An electric drive motor unit according to claim 1, characterized in that the differential (3) has a differential gear (31) provided on the differential shaft (30), the division bar (7) being provided below the differential gear (31).
3. An electric drive motor unit according to claim 2, characterized in that one end of the parting bead (7) is connected to the bottom of the housing (4) and the other end extends upwards, the parting bead (7) and the part of the housing (4) located below the differential gear (31) together forming the separate reservoir (6) with the differential gear (31).
4. An electric drive motor unit according to claim 2 or 3, characterized in that the division bar (7) is circular arc-shaped extending along the outer circumference of the differential gear (31).
5. An electric drive motor unit according to claim 1, characterized in that the pump (9) is provided in the lower part of the main reservoir (5).
CN202410169792.9A 2024-02-06 2024-02-06 Electric drive motor unit Pending CN118128889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410169792.9A CN118128889A (en) 2024-02-06 2024-02-06 Electric drive motor unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410169792.9A CN118128889A (en) 2024-02-06 2024-02-06 Electric drive motor unit

Publications (1)

Publication Number Publication Date
CN118128889A true CN118128889A (en) 2024-06-04

Family

ID=91243474

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410169792.9A Pending CN118128889A (en) 2024-02-06 2024-02-06 Electric drive motor unit

Country Status (1)

Country Link
CN (1) CN118128889A (en)

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