CN107939939A - A kind of automobile differential - Google Patents
A kind of automobile differential Download PDFInfo
- Publication number
- CN107939939A CN107939939A CN201711161902.3A CN201711161902A CN107939939A CN 107939939 A CN107939939 A CN 107939939A CN 201711161902 A CN201711161902 A CN 201711161902A CN 107939939 A CN107939939 A CN 107939939A
- Authority
- CN
- China
- Prior art keywords
- gear
- housing
- gear part
- axle portion
- wheel axle
- 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
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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
- 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
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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
- F16H48/38—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
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H48/40—Constructional details characterised by features of the rotating cases
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The present invention provides a kind of automobile differential, belong to field of mechanical technique.It solves the problems, such as that existing automobile differential is easy to cause the ablation of the bevel planet gear flank of tooth and tooth root fracture.This automobile differential, including housing, the semi-axle bevel gear and bevel planet gear that are arranged in housing, axis hole is offered on housing, bevel planet gear includes wheel axle portion and the gear part in solid taper, gear part is meshed with semi-axle bevel gear, wheel axle portion is connected to the larger one end of gear part internal diameter and is integrally formed, and wheel axle portion is rotatably connected in axis hole.This differential mechanism eliminates the structure of planetary gear shaft, so as to make full use of this segment space that installation planetary gear shaft is formerly used in housing, allow gear part vertex of a cone position size do it is relatively small, add the facewidth and the length of line of action of gear part and semi-axle bevel gear of gear part, the possibility of the ablation of the bevel planet gear flank of tooth and tooth root fracture is reduced, and can ensure the efficient and reliability transmitted.
Description
Technical field
The invention belongs to field of mechanical technique, is related to a kind of automobile differential.
Background technology
The power of automobile engine is finally proceeded in drive axle through transmission shaft, and left and right half is distributed in drive axle
For axis to drive wheel, the wherein critical piece of drive axle includes differential mechanism.Automobile differential can drive left and right (or forward and backward)
Driving wheel realizes the mechanism rotated with different rotating speeds.Mainly it is made of left and right axle shaft gear, planetary gear and tooth rest.Function is to work as
Automobile turning travel or on uneven road surface when driving, left and right wheels is rolled with different rotating speeds, that is, ensure both sides driving wheel
Make PURE ROLLING.
Differential spider pinion shaft transmits efficiently as a kind of, and the structure of good reliability is widely used by automobile differential,
In existing differential mechanism, bevel planet gear is to be connected to by planetary gear shaft in differential carrier body.
Such as Chinese patent application (application number:201410712459.4) disclose a kind of locking differential, including fixed company
The differential mechanism left shell and right differential housing connect, the left half axle and right half of connection left and right wheels is equipped with the locking differential
Axis, left half axle and the right axle shaft opposite end have been fixedly connected with axle shaft gear, axis pin, axis pin are equipped with the locking differential
It is fixed on by positioning pin in differential mechanism, the axis pin is arranged the planet cone tooth for being fixed with and being engaged with the axle shaft gear up and down
Wheel, the locking differential further include the embedded differential lock being located in the differential mechanism left shell.
There are following defect for existing differential mechanism:In order to ensure the efficient and good reliability transmitted, planetary gear shaft must
It need ask and ensure enough sizes, and which greatly limits the space of differential casing inner planet bevel gear, because planet
Bevel gear, which is arranged, to be fixed in planetary gear shaft, that is to say, that and the size of bevel planet gear vertex of a cone position is defined,
So as to cause in limited space in differential carrier body, the facewidth of bevel planet gear is defined, so as to cause bevel planet gear
Length of line of action between axle shaft gear is shorter, so as to be easy to cause the ablation of the bevel planet gear flank of tooth and tooth root fracture.
The content of the invention
The purpose of the present invention is for existing technology, there are the above problem, it is proposed that a kind of automobile differential, the present invention
The technical problem to be solved is that:How the probability of bevel planet gear flank of tooth ablation and tooth root fracture is reduced.
The purpose of the present invention can be realized by following technical proposal:A kind of automobile differential, including housing, be arranged at
Semi-axle bevel gear and bevel planet gear in housing, offer axis hole on the housing, it is characterised in that the bevel planet gear
It is meshed including wheel axle portion and the gear part in solid taper, the gear part with the semi-axle bevel gear, the wheel axle portion connects
It is connected on the larger one end of gear part internal diameter and is integrally formed, the wheel axle portion is rotatably connected in above-mentioned axis hole.
When this automobile differential works, moment of torsion is transferred directly to bevel planet gear, planet cone tooth by the housing of differential mechanism
Wheel transfers a torque to axle shaft gear by face, finally exports the semiaxis being connected to differential mechanism outside with axle shaft gear
On.
This automobile differential is and larger in gear part internal diameter by the way that bevel planet gear to be designed as to the gear part of solid taper
One end increase wheel axle portion structure, be directly rotatably connected on by the effect for taking turns axle portion on the axis hole of housing, compared to it is existing
Differential design, eliminates the structure of planetary gear shaft, as long as ensureing that wheel axle portion has enough sizes, coordinates real
The structure of the gear part of the heart, can ensure the efficient and reliability of the transmission as existing, so as to make full use of housing
Inside it is formerly used for this segment space of installation planetary gear shaft so that the size of the vertex of a cone position of gear part can be done relatively
It is small, the facewidth of gear part is added, extends the length of line of action of gear part and semi-axle bevel gear, adds the face of mesh tooth face
Product, reduces the possibility of the ablation of the bevel planet gear flank of tooth and tooth root fracture.Simultaneously as take full advantage of the sky of enclosure interior
Between after, on the premise of ensureing the facewidth and length of line of action, the size of differential casing can also be reduced accordingly, so as to fulfill more
Good vehicle lightweight.
In above-mentioned automobile differential, the grinding tooth of the gear part is extended to from the more larger one end of the internal diameter of gear part
The other end.Grinding tooth in gear part extends to the other end from one end of gear part, so as to more fully utilize in housing
Space, preferably ensure the larger facewidth and the length of line of action with semi-axle bevel gear, reduce the bevel planet gear flank of tooth burning
Erosion and the possibility of tooth root fracture, while realize vehicle lightweight.
In above-mentioned automobile differential, the coefficient of facewidth of the grinding tooth of the gear part is more than 0.4.The facewidth system of bevel gear
Number is the value of length of action divided by pitch cone away from gained, in existing differential mechanism, since planetary gear shaft is to the limit in space in housing
System so that the coefficient of facewidth of bevel planet gear grinding tooth can only accomplish 0.3~0.4.And in this differential design, pass through unique row
The structure of star bevel gear, makes full use of the space of enclosure interior, under equal bulk, the coefficient of facewidth of gear part grinding tooth
It can accomplish more than 0.4, so as to add the facewidth of gear part, extend the length of line of action of gear part and semi-axle bevel gear,
The area of mesh tooth face is added, reduces the possibility of the ablation of the bevel planet gear flank of tooth and tooth root fracture.
In above-mentioned automobile differential, the aperture of the outside diameter and the axis hole of the wheel axle portion matches, the wheel shaft
The internal perisporium of the outer circumferential surface in portion and the axis hole mutually reclines and is smooth surface.Take turns the aperture phase of the outside diameter and axis hole of axle portion
Match somebody with somebody and coordinate for smooth surface, stability is preferable, then the structure design of match wheel axle portion and solid gear part, is taken compared to existing
The planetary shaft structure that disappeared can also transmit efficient and reliability, be formerly used for so that gear part can be made full use of in housing
This segment space of planetary gear shaft is installed so that the size of the vertex of a cone position of gear part can be done relatively small, add
The facewidth of gear part, extends the length of line of action of gear part and semi-axle bevel gear, adds the area of mesh tooth face, reduces
The ablation of the bevel planet gear flank of tooth and the possibility of tooth root fracture.
In above-mentioned automobile differential, bearing is fixed with the axis hole, the wheel axle portion passes through the inner ring of bearing simultaneously
Mutually fixed with the inner ring of bearing.Wheel axle portion is connected in axis hole by bearing, and installation is more convenient, and stability is also preferable, then matches somebody with somebody
Close the structure design of wheel axle portion and solid gear part, compared to it is existing eliminate planetary shaft structure can also transmit it is efficient and reliable
Property, so that gear part can make full use of this segment space that installation planetary gear shaft is formerly used in housing so that tooth
The size of the vertex of a cone position of wheel portion can be done relatively small, add the facewidth of gear part, extend gear part and half axial cone
The length of line of action of gear, adds the area of mesh tooth face, reduce the ablation of the bevel planet gear flank of tooth and tooth root fracture can
Can property.
In above-mentioned automobile differential, oil leab, the oil leab and the axis are further opened with the housing
Hole is connected., can be by oil leab toward lubricating oil is injected in axis hole, so as to improve planet by setting oil leab
The working environment of bevel gear so that operation is more smoothly.
In above-mentioned automobile differential, the housing includes front housing and rear shell, is opened up respectively in the front housing and rear shell
There are half bore one and half bore two, the front housing and rear shell are fixed by fastener and above-mentioned half bore one and half bore two surround to form institute
State axis hole.Housing design is front housing and the split structure of rear shell, and dismounting is more convenient.And axis hole is respectively by front housing and rear shell
On half bore one and half bore two surround to be formed so that processing it is more convenient.Fastener is bolt or screw.
In above-mentioned automobile differential, also set between the gear part and one end end face for being connected of wheel axle portion and housing
There is gasket, the both ends end face of the gasket mutually reclines with the end face of gear part and housing respectively.The setting of gasket, reduces gear
Mutual abrasion between portion and housing, ensures flow field and the stability of operation, extends the service life used, while can also play
Certain noise reduction effect.
In above-mentioned automobile differential, the gear part and one end end face for being connected of wheel axle portion are the conical surface or sphere,
The gasket is taper gasket or spherical washer.The design of the conical surface and sphere coordinates the design of the gasket of same nature so that OK
The moment of torsion of star bevel gear transmits more smoothly.
Compared with prior art, this automobile differential has the following advantages:By the way that the structure of bevel planet gear uniqueness is set
Meter, eliminates the structure of planetary gear shaft, while can ensure the efficient and reliability transmitted again, so as to make full use of shell
This segment space of installation planetary gear shaft is formerly used in vivo so that the size of the vertex of a cone position of gear part can be done opposite
It is smaller, the facewidth of gear part is added, the length of line of action of gear part and semi-axle bevel gear is extended, adds mesh tooth face
Area, reduces the possibility of the ablation of the bevel planet gear flank of tooth and tooth root fracture.
Brief description of the drawings
Fig. 1 is the three-dimensional structure diagram of this automobile differential embodiment one.
Fig. 2 is the side view of this automobile differential embodiment one.
Fig. 3 is the sectional view in A-A directions in Fig. 2.
Fig. 4 is the structure chart of one middle casing of embodiment.
Fig. 5 is the three-dimensional structure diagram of this automobile differential embodiment two.
Fig. 6 is the explosive view of this automobile differential embodiment two.
In figure, 1, housing;1a, front housing;1b, rear shell;1c, axis hole;1c1, half bore one;1c2, half bore two;2nd, planet cone tooth
Wheel;2a, gear part;2b, wheel axle portion;3rd, semi-axle bevel gear;4th, gasket;5th, fastener.
Embodiment
It is the specific embodiment of the present invention and with reference to attached drawing below, technical scheme is further described,
But the present invention is not limited to these embodiments.
Embodiment one
As shown in Figs 1-4, this automobile differential, including housing 1, the semi-axle bevel gear 3 and planet that are arranged in housing 1
Bevel gear 2, housing 1 are an integral structure, and axis hole 1c is offered on housing 1.
Semi-axle bevel gear 3 is 2, and 2 semi-axle bevel gears 3 are oppositely arranged and are rotatably connected in housing 1,2 semiaxis
Contact surface between bevel gear 3 and housing 1 is the conical surface, and gasket 4, the shape of gasket 4 are additionally provided between shaft bevel gears and housing 1
For the taper to match with the contact surface of semi-axle bevel gear 3 and housing 1.According to the actual requirements, contact surface may be designed as plane or
Sphere.
Bevel planet gear 2 includes the wheel axle portion 2b and gear part 2a in solid taper, and wheel axle portion 2b is connected to gear part 2a
The larger one end of internal diameter and it is integrally formed, the aperture of the outside diameter and axis hole 1c of wheel axle portion 2b matches, and wheel axle portion 2b is rotatablely connected
In axis hole 1c, the internal perisporium of the outer circumferential surface and axis hole 1c of taking turns axle portion 2b mutually reclines and is smooth surface.Compared to it is existing
Differential design, eliminates the structure of planetary gear shaft, as long as ensureing that wheel axle portion 2b has enough sizes, coordinates
The structure of solid gear part 2a, can ensure the efficient and reliability of the transmission as existing.The grinding tooth of gear part 2a from
One end that the internal diameter of gear part 2a is more larger extends to the other end, and gear part 2a is meshed with semi-axle bevel gear 3, so as to fill
Divide this segment space for utilizing and installation planetary gear shaft being formerly used in housing 1 so that the size of the vertex of a cone position of gear part 2a
What can be done is relatively small, adds the facewidth of gear part 2a, and the coefficient of facewidth of the grinding tooth of gear part 2a can be accomplished to exceed
0.4, the length of line of action of gear part 2a and semi-axle bevel gear 3 are extended, adds the area of mesh tooth face, reduces planet cone
2 flank of tooth ablation of gear and the possibility of tooth root fracture.In the present embodiment, bevel planet gear 2 is two and is symmetrical arranged, two rows
Star bevel gear 2 is meshed with two semi-axle bevel gears 3 respectively.It is of course also possible to 3,4 even more planets are set
Bevel gear 2, selects according to the actual requirements.
In addition, gasket 4 also is provided between gear part 2a and one end end faces for being connected of wheel axle portion 2b and housing 1, gasket 4
Both ends end face reclines with the end face of gear part 2a and 1 phase of housing respectively.In the present embodiment, gear part 2a is connected with wheel axle portion 2b
One end end face be the conical surface, gasket 4 is taper gasket 4.Certainly, according to the actual requirements, gear part 2a is connected with wheel axle portion 2b
One end end face be also designed to plane or sphere, gasket 4 can also be designed as annular gasket 4 and spherical washer 4 accordingly.
Embodiment two
The present embodiment and embodiment one are essentially identical, its difference is:As it can be seen in figures 5 and 6, housing 1 includes front housing
One 1c1 of half bore and half bore two 1c2, front housing 1a and rear shell 1b are offered respectively on 1a and rear shell 1b, front housing 1a and rear shell 1b to pass through
Fastener 5 is fixed and one 1c1 of half bore and two 1c2 of half bore surround to form axis hole 1c.During installation, first by one of semi-axle bevel gear
3 and corresponding gasket 4 put on pad by loose fit placement installed position corresponding with rear shell 1b, then by two bevel planet gears 2
Piece 4, wheel axle portion 2b is placed in two 1c2 of half bore of rear shell 1b, and gear part 2a keeps engaging with axle shaft gear, then covers again
The front housing 1a of another semi-axle bevel gear 3 and gasket 4 has been assembled, front housing 1a and rear shell 1b is fixed by fastener 5 and completes dress
Match somebody with somebody, it is more convenient, and also axis hole 1c is surrounded and formed by one 1c1 of half bore on front housing 1a and rear shell 1b and two 1c2 of half bore respectively, is made
It must process more convenient.In the present embodiment, fastener 5 is bolt or screw.
Embodiment three
The present embodiment and embodiment one are essentially identical, its difference is:Bearing, wheel axle portion 2b are fixed with axis hole 1c
Through bearing inner ring and mutually fixed with the inner ring of bearing, installation it is more convenient, stability is also preferable.
Example IV
The present embodiment and embodiment one are essentially identical, its difference is:Oil leab is further opened with housing 1, is moistened
Grease way is connected with axis hole 1c, can be by oil leab toward lubricating oil is injected in axis hole 1c, so as to improve planet cone
The working environment of gear 2 so that operation is more smoothly.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can do various modifications or additions to described specific embodiment or replace in a similar way
Generation, but without departing from spirit of the invention or beyond the scope of the appended claims.
Claims (9)
1. a kind of automobile differential, including housing (1), the semi-axle bevel gear (3) and bevel planet gear that are arranged in housing (1)
(2), offer axis hole (1c) on the housing (1), it is characterised in that the bevel planet gear (2) include wheel axle portion (2b) and
In the gear part (2a) of solid taper, the gear part (2a) is meshed with the semi-axle bevel gear (3), the wheel axle portion (2b)
It is connected to the larger one end of gear part (2a) internal diameter and is integrally formed, the wheel axle portion (2b) is rotatably connected on above-mentioned axis hole (1c)
It is interior.
2. automobile differential according to claim 1, it is characterised in that the grinding tooth of the gear part (2a) is from gear part
One end that the internal diameter of (2a) is more larger extends to the other end.
3. automobile differential according to claim 1, it is characterised in that the coefficient of facewidth of the grinding tooth of the gear part (2a)
More than 0.4.
4. according to the automobile differential described in claim 1 or 2 or 3, it is characterised in that the outside diameter of the wheel axle portion (2b) and institute
The aperture for stating axis hole (1c) matches, and the outer circumferential surface of the wheel axle portion (2b) and the internal perisporium of the axis hole (1c) mutually recline and
For smooth surface.
5. according to the automobile differential described in claim 1 or 2 or 3, it is characterised in that the housing (1) includes front housing
(1a) and rear shell (1b), offers half bore one (1c1) and half bore two (1c2), institute in the front housing (1a) and rear shell (1b) respectively
Front housing (1a) and rear shell (1b) is stated to surround and to be formed by the fixed and above-mentioned half bore one (1c1) of fastener (5) and half bore two (1c2)
The axis hole (1c).
6. according to the automobile differential described in claim 1 or 2 or 3, it is characterised in that be fixed with axis in the axis hole (1c)
Hold, the wheel axle portion (2b) passes through the inner ring of bearing and mutually fixed with the inner ring of bearing.
7. according to the automobile differential described in claim 1 or 2 or 3, it is characterised in that be further opened with moistening on the housing (1)
Grease way, the oil leab are connected with the axis hole (1c).
8. according to the automobile differential described in claim 1 or 2 or 3, it is characterised in that the gear part (2a) and wheel axle portion
Be additionally provided with gasket (4) between one end end face that (2b) is connected and housing (1), the both ends end face of the gasket (4) respectively with tooth
The end face of wheel portion (2a) mutually reclines with housing (1).
9. automobile differential according to claim 8, it is characterised in that the gear part (2a) is connected with wheel axle portion (2b)
One end end face connect is the conical surface or sphere, and the gasket (4) is taper gasket or spherical washer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201711161902.3A CN107939939A (en) | 2017-11-21 | 2017-11-21 | A kind of automobile differential |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201711161902.3A CN107939939A (en) | 2017-11-21 | 2017-11-21 | A kind of automobile differential |
Publications (1)
Publication Number | Publication Date |
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CN107939939A true CN107939939A (en) | 2018-04-20 |
Family
ID=61929417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201711161902.3A Pending CN107939939A (en) | 2017-11-21 | 2017-11-21 | A kind of automobile differential |
Country Status (1)
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CN (1) | CN107939939A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110450612A (en) * | 2019-09-19 | 2019-11-15 | 重庆青山工业有限责任公司 | Integrated electric drive assembly |
CN112283316A (en) * | 2020-11-25 | 2021-01-29 | 南京好龙电子有限公司 | Differential and shell thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6689009B1 (en) * | 2001-06-29 | 2004-02-10 | Torque-Traction Technologies, Inc. | Compact differential assembly |
CN102124253A (en) * | 2008-09-04 | 2011-07-13 | 德纳重型车辆系统集团有限责任公司 | A spider-less vehicle differential |
CN203335772U (en) * | 2012-12-31 | 2013-12-11 | 陕西汉德车桥有限公司 | Differential mechanism for drive axle |
CN203463586U (en) * | 2013-07-30 | 2014-03-05 | 长城汽车股份有限公司 | Planet gear mechanism of differential mechanism |
CN105485291A (en) * | 2016-01-22 | 2016-04-13 | 中国科学院宁波材料技术与工程研究所 | Differential planetary gear structure and vehicle |
-
2017
- 2017-11-21 CN CN201711161902.3A patent/CN107939939A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6689009B1 (en) * | 2001-06-29 | 2004-02-10 | Torque-Traction Technologies, Inc. | Compact differential assembly |
CN102124253A (en) * | 2008-09-04 | 2011-07-13 | 德纳重型车辆系统集团有限责任公司 | A spider-less vehicle differential |
CN203335772U (en) * | 2012-12-31 | 2013-12-11 | 陕西汉德车桥有限公司 | Differential mechanism for drive axle |
CN203463586U (en) * | 2013-07-30 | 2014-03-05 | 长城汽车股份有限公司 | Planet gear mechanism of differential mechanism |
CN105485291A (en) * | 2016-01-22 | 2016-04-13 | 中国科学院宁波材料技术与工程研究所 | Differential planetary gear structure and vehicle |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110450612A (en) * | 2019-09-19 | 2019-11-15 | 重庆青山工业有限责任公司 | Integrated electric drive assembly |
CN110450612B (en) * | 2019-09-19 | 2024-04-09 | 重庆青山工业有限责任公司 | Integrated electric drive assembly |
CN112283316A (en) * | 2020-11-25 | 2021-01-29 | 南京好龙电子有限公司 | Differential and shell thereof |
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Application publication date: 20180420 |
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