CN113565941A - High integrated structure of differential mechanism and motor - Google Patents

High integrated structure of differential mechanism and motor Download PDF

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Publication number
CN113565941A
CN113565941A CN202110608722.5A CN202110608722A CN113565941A CN 113565941 A CN113565941 A CN 113565941A CN 202110608722 A CN202110608722 A CN 202110608722A CN 113565941 A CN113565941 A CN 113565941A
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CN
China
Prior art keywords
motor
differential
differential mechanism
planetary gear
integrated structure
Prior art date
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Pending
Application number
CN202110608722.5A
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Chinese (zh)
Inventor
孙利锋
胡晓华
周文武
张慧
李金辉
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Zhejiang PanGood Power Technology Co Ltd
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Zhejiang PanGood Power Technology 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.)
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Publication date
Application filed by Zhejiang PanGood Power Technology Co Ltd filed Critical Zhejiang PanGood Power Technology Co Ltd
Priority to CN202110608722.5A priority Critical patent/CN113565941A/en
Priority to PCT/CN2021/117508 priority patent/WO2022252431A1/en
Publication of CN113565941A publication Critical patent/CN113565941A/en
Pending legal-status Critical Current

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    • 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
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
    • 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
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • 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
    • 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
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0482—Gearings with gears having orbital motion
    • F16H57/0483—Axle or inter-axle differentials
    • 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
    • F16H57/08—General details of gearing of gearings with members having orbital motion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02034—Gearboxes combined or connected with electric machines
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Retarders (AREA)

Abstract

The invention belongs to the technical field of driving devices, and particularly relates to a high-integration structure of a differential mechanism and a motor. The invention aims at the problems that the whole structure is not compact enough and large power assembly space is needed in the prior art, and provides a highly integrated structure of a differential mechanism and a motor. The differential mechanism and the motor are integrated with each other, so that the differential mechanism and the motor can share a part of structure, and the overall structure is compact, and the space of a vehicle power assembly can be saved.

Description

High integrated structure of differential mechanism and motor
Technical Field
The invention belongs to the technical field of driving devices, and particularly relates to a high-integration structure of a differential mechanism and a motor.
Background
An electric machine, commonly known as a motor, is an electromagnetic device that converts or transmits electric energy according to the law of electromagnetic induction. The differential is a mechanism which can enable the left and right driving wheels of the automobile to rotate at different rotating speeds. Mainly comprises a left half shaft gear, a right half shaft gear, two planet gears and a gear carrier. The function is that when the automobile turns or runs on an uneven road surface, the left wheel and the right wheel roll at different rotating speeds, namely, the pure rolling motion of the driving wheels at two sides is ensured. The differential is provided for adjusting the difference in the rotational speeds of the left and right wheels.
In the prior art, most of motors and differentials are arranged independently, so that the problems that the whole structure is not compact enough and large power assembly space is needed are caused.
For example, the chinese invention patent discloses a driving apparatus for a motor vehicle [ application No.: 201680066980.2] comprising a differential and a torque vectoring unit having an electric machine, wherein the differential has a first planetary gear set and a second planetary gear set, which are rotatably supported on a common connection, wherein the first planetary gear set is in mesh with at least a first sun gear, the second planetary gear set is in mesh with at least a second sun gear, and the two planetary gear sets are in mesh with each other at least in pairs, and wherein at least the second sun gear is connected to the torque vectoring unit in order to redistribute the torque between the first and second sun gears, characterized in that the first planetary gear set is also in mesh with a third sun gear, wherein the third sun gear is connected to the torque vectoring unit, so as to redistribute torque between the first and second sun gears.
The differential mechanism and the motor are respectively and independently arranged, so that the problems that the structure is not compact enough and a large power assembly space is needed exist.
Disclosure of Invention
The invention aims to solve the problems and provides a differential and motor highly integrated structure which is compact in structure and can save the space of a vehicle power assembly.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a differential mechanism and motor high integrated configuration, includes differential mechanism and motor, differential mechanism includes the differential mechanism shell body for output power's semi-axis and differential mechanism drive connection, differential mechanism installs in the motor and the differential mechanism shell body constitutes the pivot of motor.
In the highly integrated structure of the differential and the motor, the motor comprises a motor outer shell, and the differential outer shell is rotatably arranged on a bearing chamber of the motor outer shell.
In the above-mentioned differential mechanism and motor highly integrated structure, be equipped with the stator in the motor housing body and can take place relative stator pivoted rotor, stator fixed connection is on the motor housing body, the differential mechanism shell body is located motor housing body inside and connects on the rotor.
In the highly integrated structure of the differential and the motor, a planetary gear connected to the differential outer shell is arranged in the differential outer shell, a half shaft is connected to the differential outer shell, and a half shaft gear is arranged at the end part of the half shaft and meshed with the planetary gear.
In the above-mentioned differential and motor highly integrated structure, the planetary gear is located inside the rotor.
In the highly integrated structure of the differential and the motor, the two half shafts are symmetrically connected to two sides of the outer shell of the differential.
In the highly integrated structure of the differential and the motor, the two planetary gears are arranged oppositely, each planetary gear is meshed with the two half shafts, the planetary gears are rotationally connected with the outer shell of the differential and the rotation centers of the planetary gears are positioned on the axis of the planetary gears, and the two planetary gears can rotate relatively independently.
In the highly integrated structure of the differential and the motor, the connecting line of the centers of the two planetary gears is vertical to the connecting line of the centers of the two half shafts.
In the highly integrated structure of the differential and the motor, the axis of the planet gear is coincident with the axis of the rotor; the planet gear is a conical gear.
Compared with the prior art, the invention has the advantages that:
1. the differential mechanism and the motor are integrated with each other, so that the differential mechanism and the motor can share a part of structure, and the overall structure is compact, and the space of a vehicle power assembly can be saved.
2. The differential mechanism is connected to the rotor of the motor, and internal parts of the differential mechanism, such as a planetary gear and other structures, can be arranged in the rotor, so that the integration degree is further improved, and the space of a vehicle power assembly is further saved.
3. The invention applies the integrated modular planetary reduction mechanism to the driving system, adapts to different torque output requirements, enables the application of the power assembly to be closer to the requirements of users, shortens the development period and reduces the production cost.
4. According to the invention, the circulating oil duct is arranged in the motor shell, and lubricating oil is conveyed through the circulating oil duct to lubricate the differential mechanism, and meanwhile, the cooling effect on the motor can be achieved, so that the cooling oil duct can be better applied to the integrated structure of the differential mechanism and the motor, and the service life of the structure is prolonged.
5. According to the invention, the second sealing element is arranged between the lubricating port and the mounting cavity, so that the lubricating oil can be prevented from leaking into the mounting cavity to influence the internal structures of the motor rotor, the motor stator and the like, and the sealing effect is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a drive assembly;
in the figure: the differential 1, the motor 2, the bearing 3, the differential outer shell 11, the planetary gear 12, the half shaft 13, the first sealing member 14, the lubricating cavity 15, the oil guiding groove 16, the oil stirring groove 17, the side gear 18, the second sealing member 19, the motor outer shell 21, the stator 22, the rotor 23, the lubricating port 24, the circulating oil passage 25, the mounting cavity 26, the drive assembly 100, the oil guiding channel 161, the planetary reduction mechanism 200, the first sun gear 201, the first planetary gear 202, the first frame 203, the second sun gear 204, the second planetary gear 205, the second frame 206, the output shaft 207, the upper circulating oil passage 251 and the lower circulating oil passage 252.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
The present embodiment provides a highly integrated structure of a differential and a motor, as shown in fig. 1, comprising a driving assembly 100 and a planetary reduction mechanism 200, wherein the driving assembly 100 comprises a motor 2 integrated with a differential 1, and the planetary reduction mechanism 200 is in driving connection with the differential 1.
When the planetary reduction gear is used, the power output by the driving assembly 100 is reduced by the planetary reduction mechanism 200 and then transmitted to the output shaft. Therefore, the integrated modular planetary reduction mechanism 200 is applied to a driving system, different torque output requirements are met, the application of a power assembly is closer to the requirements of users, the development period is shortened, and the production cost is reduced.
Specifically, the planetary reduction mechanism 200 is a two-stage planetary reduction mechanism, that is, the planetary reduction mechanism 200 includes a first sun gear 201 in driving connection with the differential 1, the first sun gear 201 is engaged with a first planetary gear 202, one end of a first frame 203 is connected to the center of the first planetary gear 202, the other end is in driving connection with a second sun gear 204, the second sun gear 204 is engaged with a second planetary gear 205, one end of a second frame 206 is connected to the center of the second planetary gear 205, and the other end is in driving connection with an output shaft 207.
When in use, power is input to the first sun gear 201 through the differential 1, and then is transmitted to the output shaft 207 through the first planet gear 202, the first frame 203, the second sun gear 204, the second planet gear 205 and the second frame 206 in sequence.
Preferably, the axial lines of the first sun gear 201 and the second sun gear 204 coincide with each other. Therefore, power can be transmitted along the same straight line, and the stability of the power transmission process is ensured.
Preferably, the first sun gear 201 and the second sun gear 204 have the same radius, the first planet gear 202 and the second planet gear 205 have the same radius, the first frame 203 and the second frame 206 have the same radius, and the diameter of the first sun gear 201 is 1.0-1.5 times the diameter of the first planet gear 202. This can ensure that the reduction ratio of the planetary reduction mechanism 200 is within a preferable range.
Referring to fig. 1 and 2, half shafts 13 are further arranged between the differential 1 and the planetary reduction mechanism 200, two half shafts 13 are symmetrically connected to two sides of the differential 1, and the planetary reduction mechanisms 200 are connected with the half shafts 13 in a one-to-one correspondence manner. The power of the motor 2 is transmitted to two wheel hubs of the electric vehicle through the differential 1 and two half shafts 13.
Preferably, the axial line of the half shaft 13 and the axial line of the planetary reduction mechanism 200 coincide with each other. This ensures stability of the transmission process.
As shown in fig. 2, the differential 1 includes a differential outer housing 11, a half shaft 13 for outputting power is in driving connection with the differential 1, the differential 1 is installed in the motor 2, and the differential outer housing 11 constitutes a rotating shaft of the motor 2. In particular, the motor 2 may include a motor outer housing 21, and the differential outer housing 11 is rotatably mounted on a bearing chamber of the motor outer housing 21. The differential outer shell 11 is used as a part of a rotating shaft of the motor 2, so that the differential 1 and the motor 2 at least have a part of shared structure, namely the differential 1 and the motor 2 are mutually integrated, so that the differential 1 and the motor 2 can share a part of structure, and the overall structure is compact, and the space of a vehicle power assembly can be saved.
A part of the structure shared by the differential 1 and the motor 2 may be other parts or structures besides the housing.
Preferably, the motor 2 includes a motor outer casing 21, a stator 22 and a rotor 23 capable of rotating relative to the stator 22 are arranged in the motor outer casing 21, the stator 22 is fixedly connected to the motor outer casing 21, and the differential 1 is located inside the motor outer casing 21 and connected to the rotor 23. Differential 1 is including connecting the differential case body 11 on rotor 23, be equipped with the planetary gear 12 of connection on differential case body 11 in the differential case body 11, still include the semi-axis 13 of being connected with the drive of planetary reduction mechanism 200, the one end that planetary reduction mechanism 200 was kept away from to semi-axis 13 is connected on differential case body 11, semi-axis 13 tip is equipped with side gear 18, side gear 18 meshes with planetary gear 12 mutually. The half shafts 13 are provided with two and symmetrically connected to two sides of the differential shell 11.
Specifically, the planetary gear 12 is located inside the rotor 23, and the planetary gear 12 is provided with two and opposite positions, each planetary gear 12 is meshed with two half shafts 13, the planetary gear 12 is rotatably connected with the differential outer housing 11, the rotation center of the planetary gear 12 is located on the axis of the planetary gear 12, and the two planetary gears 12 can rotate relatively independently. The planet gears 12 may be implemented by conical gears as known in the art.
When the differential is used, power is transmitted to the differential outer shell 11 from the rotor 23 integrated on the differential outer shell 11, when a vehicle runs in a straight line and the rotating speeds of left and right driving wheels are the same, the internal structure of the whole differential 1 is equivalent to a whole, and all parts do not rotate relatively. When the vehicle turns, the resistance difference is absorbed through the autorotation of the planet gear 12 around the axis direction thereof, so that the side gear 18 can rotate at different rotating speeds and is finally transmitted to the half shafts 13 on two sides, and the driving comfort of the vehicle is improved. The differential 1 is connected to the rotor 23 of the motor 2, and internal parts of the differential 1, such as the planetary gear 12 and other structures, can be arranged inside the rotor 23, so that the integration degree is further improved, and the space of a vehicle power assembly is further saved. And the installation is more convenient, and the installation connection can be directly realized by utilizing bolts.
Preferably, the line connecting the centers of the two planetary gears 12 and the line connecting the centers of the two half shafts 13 are perpendicular to each other. Thus, the effect of absorbing the resistance difference of the two planetary gears 12 can be further ensured, and the driving comfort of the vehicle is further improved.
Preferably, the axis of the planetary gear 12 coincides with the axis of the rotor 23.
As shown in fig. 2, a first seal 14 is provided between the motor 2 and the half shaft 13, and the first seal 14 is provided near the outside of the motor for preventing the lubricant oil from leaking to the outside of the motor 2. The motor 2 comprises a motor outer shell 21, an installation cavity 26 is arranged in the motor outer shell 21, the differential 1 is located in the installation cavity 26, a circulation oil channel 25 is further arranged in the motor outer shell 21, the circulation oil channel 25 is communicated with the differential 1 through a lubrication port 24, a second sealing element 19 is further arranged between the lubrication port 24 and the installation cavity 26, and the lubrication port 24 is located between the first sealing element 14 and the second sealing element 19. The second seal 19 is located adjacent the inside of the motor and serves to prevent leakage of lubricating oil into the mounting cavity 26. Compared with the prior art, the invention has the advantages that the second sealing element 19 is arranged between the lubricating port 24 and the mounting cavity 26, so that the lubricating oil can be prevented from leaking into the mounting cavity 26 to influence the internal structure of the motor 2 such as the rotor 23, the stator 22 and the like, and the sealing effect is good
Specifically, the differential 1 includes a differential outer housing 11 having a lubrication cavity 15 therein, the lubrication port 24 is communicated with the lubrication cavity 15, and the lubricating oil in the circulation oil passage 25 can flow into the lubrication cavity 15 through the lubrication port 24, so as to achieve lubrication. The second sealing element 19 is located between the differential outer shell 11 and the motor outer shell 21, the inner surface of the second sealing element 19 is in sealing fit with the differential outer shell 11, and the outer surface of the second sealing element 19 is in sealing fit with the motor outer shell 21. The installation cavity 26 is also internally provided with a stator 22 and a rotor 23 which can rotate relative to the stator 22, the stator 22 is fixedly connected to the motor outer shell 21, and the differential outer shell 11 is connected to the rotor 23.
The first sealing member 14 and the second sealing member 19 may be of a specific structure commonly used for sealing in the prior art, such as an oil seal.
As shown in fig. 2, a bearing 3 for reducing friction between the differential outer housing 11 and the motor outer housing 21 is further disposed between the two, and the bearing 3 is also located between the first seal 14 and the second seal 19. This reduces the friction between the differential outer case 11 and the motor outer case 21, thereby reducing wear.
Preferably, the motor 2 is a disc motor. This also makes it possible to make the distance between the two bearings 3 narrow, since the disc motor has a small axial length.
As shown in fig. 2, the sealing members 14 and 19 are annular, and the axial lines of the sealing members 14 and 19 coincide with the axial line of the half shaft 13. This further ensures the sealing effect in use.
Preferably, a circulation oil passage 25 is further provided in the motor outer casing 21, and an end of the circulation oil passage 25 is communicated with the lubrication port 24. According to the invention, the circulating oil passage 25 is arranged in the motor outer shell 21, and lubricating oil is conveyed through the circulating oil passage 25 to lubricate the differential 1, and meanwhile, the cooling effect on the motor 2 can be achieved.
Further preferably, the number of the circulating oil passages 25 is several, and the circulating oil passages 25 are uniformly distributed along the circumferential direction of the axis of the half shaft 13. The position of the circulating oil passage 25 is set in such a way that the uniformity of the cooling effect on the motor outer shell 21 can be ensured.
Specifically, the number of the lubricating ports 24 is at least four, at least two lubricating ports 24 are located above the half shaft 13, at least two lubricating ports 24 are located below the half shaft 13, the circulating oil passage 25 includes an upper circulating oil passage 251 located above the half shaft 13 and a lower circulating oil passage 252 located below the half shaft 13, the two lubricating ports 24 located above the half shaft 13 are communicated through the upper circulating oil passage 251, and the two lubricating ports 24 located below the half shaft 13 are communicated through the lower circulating oil passage 252.
As shown in fig. 2, the lubrication port 24 communicates with the lubrication cavity 15 via an oil guide groove 16, the oil guide groove 16 is disposed on the inner surface of the differential 1 and recessed toward the inside of the differential 1, or the oil guide groove 16 is disposed on the outer surface of the axle shaft 13 and recessed toward the inside of the axle shaft 13. That is, the oil guide groove 16 may be provided on the inner surface of the differential 1 or on the outer surface of the half shaft 13.
Preferably, the oil guide groove 16 extends in a spiral shape, and the axis of the oil guide groove 16 coincides with the axis of the half shaft 13.
Preferably, the oil guide grooves 16 are arranged on the outer surface of the half shafts 13, at least two oil guide grooves 16 are arranged on each half shaft 13, and the oil inlet position of each oil guide groove 16 is different. For example, two oil guide grooves 16 are provided, and the oil inlet positions of the two oil guide grooves 16 are separated by a distance of 90 degrees on the surface of the half shaft 13, so that lubricating oil in different directions can be conveniently guided into the oil guide grooves 16.
As shown in fig. 2, the oil guiding groove 16 includes a plurality of oil guiding channels 161 sequentially connected, and an included angle between a center line of the oil guiding channel 161 and an axial line of the half shaft 13 is 45-75 degrees. The oil guide channel 161 is arranged in the angle range, and has the advantages of good oil guide effect and low processing difficulty. Preferably, the oil guide channel 161 has a centerline that forms an angle of 60 degrees with the axial centerline of the axle shaft 13.
As shown in fig. 2, an oil sump 17 is provided in the differential case 11 and/or the axle shaft 13. That is, the oil sumps 17 may be provided on the differential case 11, on the axle shafts 13, or on both the differential case 11 and the axle shafts 13. When the oil stirring groove 17 is arranged on the differential shell 11, the oil stirring groove 17 is provided with a plurality of oil stirring grooves 17, and the oil stirring grooves 17 are uniformly distributed along the circumferential direction of the axial lead of the half shaft 13; when the oil stirring groove 17 is arranged on the half shaft 13, the oil stirring groove 17 is provided with a plurality of oil stirring grooves 17 which are uniformly distributed along the circumferential direction of the axial lead of the half shaft 13. The oil stirring grooves 17 are uniformly arranged, so that the uniform mass distribution of the differential case 11 and the half shaft 13 can be ensured, and the stability of the rotation process is ensured.
During use, the oil guide groove 16 enables lubricating oil to form axial movement inside the differential outer shell 11, so that the lubricating oil is continuously circulated between the differential outer shell 11 and the motor outer shell 21; and then the lubricating oil is stirred by the oil stirring groove 17 to generate centrifugal force, so that the lubricating oil enters the circulating oil channel 25 in the motor outer shell 21, and the circulation of the lubricating oil is accelerated.
The specific position of the oil stirring groove 17 is not limited in the present invention, as long as the effect of accelerating the flow of the lubricating oil during rotation can be achieved. But preferably, the oil agitation groove 17 is located directly above or below the lubrication port 24.
Example 2
The embodiment provides a differential and motor highly integrated structure, the specific structure thereof is substantially the same as that in embodiment 1, and the difference lies only in the specific integration manner of the differential 1 and the motor 2, specifically, the motor 2 includes a motor outer housing 21, the differential 1 includes a differential outer housing 11, the differential outer housing 11 is fixedly connected to the motor outer housing 21, and the differential outer housing 11 and the motor outer housing 21 share a part of the housing. In this embodiment, the differential 1 is integrated outside the motor 2, and the differential outer case 11 of the differential 1 and the motor outer case 21 of the motor 2 have a partially shared structure, that is, the differential 1 and the motor 2 share a partial case.
Example 3
The embodiment provides a highly integrated structure of a differential and a motor, the specific structure of which is substantially the same as that of embodiment 1, the difference is only in the specific integration manner of the differential 1 and the motor 2, specifically, the highly integrated structure further comprises a housing, the differential 1 and the motor 2 are both located in the housing, and an output shaft of the motor 2 is connected with an input shaft of the differential 1. In the embodiment, the differential 1 and the motor 2 are arranged in a large shell together, the shell is a structure shared by the differential 1 and the motor 2, and the differential 1 and the motor 2 are still connected with an input shaft through an output shaft in the shell.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms of differential 1, motor 2, bearing 3, differential outer housing 11, planetary gear 12, half shaft 13, first seal 14, lubrication cavity 15, oil guide groove 16, oil stirring groove 17, side gear 18, second seal 19, motor outer housing 21, stator 22, rotor 23, lubrication port 24, circulation oil passage 25, mounting cavity 26, drive assembly 100, oil guide passage 161, planetary reduction mechanism 200, first sun gear 201, first planetary gear 202, first frame 203, second sun gear 204, second planetary gear 205, second frame 206, output shaft 207, upper circulation oil passage 251, lower circulation oil passage 252, etc., are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (9)

1. A differential mechanism and motor high integrated configuration, includes differential mechanism (1) and motor (2), differential mechanism (1) includes differential mechanism shell body (11), is used for half axle (13) of output power and differential mechanism (1) drive connection, its characterized in that: differential mechanism (1) is installed in motor (2) and differential mechanism shell body (11) constitutes the pivot of motor (2).
2. The differential and motor highly integrated structure of claim 1, wherein: the motor (2) comprises a motor outer shell (21), and the differential outer shell (11) is rotatably mounted on a bearing chamber of the motor outer shell (21).
3. The differential and motor highly integrated structure as claimed in claim 2, wherein: be equipped with stator (22) and rotor (23) that can take place relative stator (22) pivoted in motor shell body (21), stator (22) fixed connection is on motor shell body (21), differential mechanism shell body (11) are located motor shell body (21) inside and connect on rotor (23).
4. The differential and motor highly integrated structure as claimed in claim 3, wherein: be equipped with planetary gear (12) of connection on differential mechanism shell body (11) in differential mechanism shell body (11), half axle (13) are connected on differential mechanism shell body (11), half axle (13) tip is equipped with half axle gear (18), half axle gear (18) and planetary gear (12) mesh mutually.
5. The differential and motor highly integrated structure as claimed in claim 4, wherein: the planetary gear (12) is located inside the rotor (23).
6. The differential and motor highly integrated structure as claimed in claim 4, wherein: the half shafts (13) are provided with two half shafts and are symmetrically connected to two sides of the differential mechanism outer shell (11).
7. The differential and motor highly integrated structure as claimed in claim 6, wherein: planetary gear (12) are equipped with two and relative setting, and every planetary gear (12) all meshes mutually with two semi-axles (13), planetary gear (12) rotate with differential mechanism shell body (11) and be connected and planetary gear (12) rotation center is located planetary gear (12) axis, can take place relatively independent rotation between two planetary gear (12).
8. The differential and motor highly integrated structure as claimed in claim 6, wherein: the connecting line of the centers of the two planetary gears (12) is vertical to the connecting line of the centers of the two half shafts (13).
9. The differential and motor highly integrated structure as claimed in claim 4, wherein: the axis of the planetary gear (12) is coincident with the axis of the rotor (23); the planet gear (12) is a conical gear.
CN202110608722.5A 2021-06-01 2021-06-01 High integrated structure of differential mechanism and motor Pending CN113565941A (en)

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PCT/CN2021/117508 WO2022252431A1 (en) 2021-06-01 2021-09-09 Differential and motor highly integrated structure

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