CN112928859A - Differential function rotor and driving motor - Google Patents
Differential function rotor and driving motor Download PDFInfo
- Publication number
- CN112928859A CN112928859A CN202110079481.XA CN202110079481A CN112928859A CN 112928859 A CN112928859 A CN 112928859A CN 202110079481 A CN202110079481 A CN 202110079481A CN 112928859 A CN112928859 A CN 112928859A
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- China
- Prior art keywords
- differential
- rotor
- end cover
- half shaft
- shaft
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1672—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
- H02K7/003—Couplings; Details of shafts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a differential function rotor and a driving motor adopting the same. The differential function rotor comprises a hollow rotor and a differential mechanism, wherein the hollow rotor is matched with the stator; the differential is arranged inside the hollow rotor; the differential comprises two axially arranged differential sun wheels and two radially arranged differential planet wheels, and the upper side and the lower side of each differential sun wheel are respectively meshed with the corresponding sides of the two differential planet wheels; the output shafts of the sun gears of the two differentials are correspondingly fixed with the left half shaft and the right half shaft; the mounting shafts of the two differential planet gears are connected with the inner wall of the hollow rotor. The invention can realize differential output in two directions by using one motor, has compact structure, saves space, simplifies a driving system, improves transmission efficiency, is environment-friendly and has low noise.
Description
Technical Field
The invention relates to the technical field of electric automobile manufacturing, in particular to a differential function rotor and a driving motor.
Background
The most basic transmission wheel configuration of a typical vehicle mainly includes a wheel axle, two transmission wheels disposed at two ends of the wheel axle and rotating coaxially with the wheel axle, and a set of transmission components rotating coaxially with the wheel axle and transmitting power. When the transmission assembly is driven by a power source to drive the wheel shaft to rotate, the transmission wheels at the two ends of the wheel shaft synchronously rotate to achieve the purpose of enabling the vehicle to advance.
When a vehicle runs on a curve or turns, the problem that the wheels on the left side and the right side of the vehicle have different rotating speeds in the same time because the path (circumference) taken by the inner side wheels is shorter and the path (circumference) taken by the outer side wheels is longer can be caused; therefore, if two driving wheels are installed on the same wheel axle, the turning will be unsmooth, and the problems of easy rollover, tire abrasion and the like will occur.
Disclosure of Invention
The invention aims to solve the problems, and provides a differential function rotor and a driving motor adopting the differential function rotor, so that differential output in two directions is realized, half shafts on two sides can rotate at different rotating speeds, wheels on two sides can run in an unequal distance mode in a pure rolling mode as far as possible, and friction between the tires and the ground is reduced.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a differential function rotor comprises a hollow rotor, a differential, a left half shaft and a right half shaft, wherein the hollow rotor is matched with a stator; the differential is arranged inside the hollow rotor; the differential comprises two axially arranged differential sun wheels and two radially arranged differential planet wheels, and the upper side and the lower side of each differential sun wheel are respectively meshed with the corresponding sides of the two differential planet wheels; the output shafts of the sun gears of the two differentials are correspondingly fixed with the left half shaft and the right half shaft; the mounting shafts of the two differential planet gears are connected with the inner wall of the hollow rotor.
And the output shafts of the two differential sun gears are correspondingly connected with the left half shaft and the right half shaft through splines.
And the shaft ends of the output shafts of the two differential sun gears form shaft connecting holes, and are correspondingly connected with the left half shaft and the right half shaft through splines through the shaft connecting holes.
The output shafts of the two differential sun gears are correspondingly connected with second sliding bearings arranged in shaft holes of a rotor left end cover and a rotor right end cover; the hollow rotor is supported by a rotor left end cover and a rotor right end cover.
The hollow rotor, the differential, the left half shaft and the right half shaft are in the same axis, the hollow rotor is used for power input of the differential, and the two differential sun gears are used for power output ends of the left side and the right side of the differential.
The inner wall of the hollow rotor is provided with a bearing mounting hole, a first sliding bearing is mounted outside a mounting shaft of the differential planet gear, and the first sliding bearing is mounted in the bearing mounting hole.
The invention also aims to provide a driving motor, which comprises a stator and a rotor matched with the stator, wherein the rotor adopts the differential function rotor.
And rolling bearings are coaxially arranged between the rotor left end cover and the rotor right end cover and between the corresponding stator left end cover and the corresponding stator right end cover respectively.
And the left half shaft and the right half shaft correspondingly extend out of the shaft holes in the centers of the stator left end cover and the stator right end cover to output power.
The differential function rotor provided by the invention can enable the half shafts on the two sides to rotate at different rotating speeds, so that the condition that wheels on the two sides run in a pure rolling mode at unequal distances as far as possible is met, and the friction between tires and the ground is reduced.
The driving motor provided by the invention has excellent performance due to the adoption of the differential function rotor, can realize differential output in two directions by using one motor, has a compact structure, saves space, simplifies a driving system, improves transmission efficiency, is environment-friendly and low in noise, and has great production practice significance.
Drawings
Fig. 1 is a schematic structural diagram of a driving motor using a differential function rotor according to the present invention.
In the figure: 1. the left half shaft 2, the right half shaft 3, the stator left end cover 4, the stator right end cover 5, the stator 6, the hollow rotor 7, the differential 8, the planet wheel 9, the sun wheel 10, the first sliding bearing 11, the rotor right end cover 12, the rotor left end cover 13, the rolling bearing 14 and the second sliding bearing.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1, a differential function rotor comprises a hollow rotor 6 for matching a stator 5, a differential 7, a left half shaft 1 and a right half shaft 2; the differential mechanism 7 is arranged inside the hollow rotor 6 and connected with the rotor; the power output ends at two sides of the differential mechanism 7 are respectively connected with the left half shaft 1 and the right half shaft 2; the differential mechanism 7 comprises two differential mechanism sun gears 9 which are axially arranged and two differential mechanism planet gears 8 which are radially arranged, and the upper side and the lower side of each differential mechanism sun gear 9 are respectively meshed with the corresponding sides of the two differential mechanism planet gears 8; the output shafts of the two differential sun gears 9 are correspondingly fixed with the left half shaft 1 and the right half shaft 2; the mounting shafts of the two differential planet wheels 8 are connected with the inner wall of the hollow rotor 6; the left half shaft 1 and the right half shaft 2 respectively extend out of a stator left end cover 3 and a stator right end cover 4 of the driving motor to output power.
In the invention, the driving motor is a power source, the hollow rotor 6 on the driving motor outputs power outwards, the driving motor firstly transmits the power to the differential 7 inside the hollow rotor 6 through the hollow rotor 6, then transmits the power to the left half shaft 1 and the right half shaft 2 connected with the power output shaft of the differential 7, and then the left half shaft 1 and the right half shaft 2 respectively extend out of the stator left end cover 3 and the stator right end cover 4 to output the power.
The output shafts of the two differential sun gears 9 are connected with the left half shaft 1 and the right half shaft 2 through splines.
Specifically, the shaft ends of the output shafts of the two differential sun gears 9 form a shaft connecting hole, and are connected with the left half shaft 1 and the right half shaft 2 through splines corresponding to the shaft connecting hole.
The output shafts of the two differential sun gears 9 are correspondingly connected with second sliding bearings 14 mounted in shaft holes of a rotor left end cover 12 and a rotor right end cover 11; the hollow rotor 6 is supported by a rotor left end cover 12 and a rotor right end cover 11.
The structure of the rotor left end cover 12 is the same as that of the rotor right end cover 11, the inner side and the outer side of the rotor left end cover are both provided with concentric shaft hole parts formed by extending in the axial direction, and the T-shaped part formed by connecting the inner side and the shaft hole parts is sleeved in the end surface of the T-shaped opening at the end part of the hollow rotor and is matched with the hollow rotor 6.
The power output of the hollow rotor 6, the differential 7, the left half shaft 1 and the right half shaft 2 are on the same axis, the hollow rotor 6 is the power input of the differential 7, and the two differential sun gears 9 are the power output ends of the left side and the right side of the differential 7.
In the invention, the hollow rotor 6, the differential 7, the left half shaft 1 and the right half shaft 2 are in the same axis. Therefore, the power output of the electric axle assembly is smooth and high in efficiency.
Wherein, form the bearing mounting hole on the hollow rotor 6 inner wall, differential mechanism planet wheel 8's installation axle installs first slide bearing 7 outward, first slide bearing 7 is installed in the bearing mounting hole.
According to the invention, when a differential condition does not exist, the differential planet wheel 8 of the differential 7 is equivalent to an equiarm lever, no rotation is generated, only the torque transmitted by the hollow rotor 6 of the motor is uniformly distributed to the two differential sun wheels 9 to drive the two differential sun wheels 9 to rotate, when a differential condition exists between left and right driving wheels, the upper and lower planet wheels 8 of the differential also rotate correspondingly, at this time, the two differential planet wheels 8 correspondingly drive the two differential sun wheels 9 to rotate at different speeds, and the two differential sun wheels 9 are used as power output ends at the left side and the right side of the differential to drive the left half shaft 1 and the right half shaft 2 to rotate together to drive and output power.
Referring to fig. 1, the present invention also provides a driving motor including a stator 5 and a rotor engaged with the stator 5, wherein the rotor adopts the above differential function rotor.
Specifically, the left half shaft 1 and the right half shaft 2 respectively extend out of a stator left end cover 3 and a stator right end cover 4 of the driving motor to output power. Specifically, the stator left end cover 3 and the stator right end cover 4 have the same structure, and are end covers with a cross section of a T-shaped structure, a semi-shaft extending hole is formed in the center, the inner side of each end cover is connected with the end side of the stator in a matched manner through a ring-shaped protruding extending matching part, and the rolling bearing 13 is installed between the circular inner wall surface of the ring-shaped protruding extending matching part and the outer wall surface of the concentrically extending outer shaft hole part formed on the outer sides of the rotor left end cover 12 and the rotor right end cover 11.
The diameter of a through hole of a half shaft formed at the center of the stator left end cover 3 and the stator right end cover 4 is equal to the inner diameter of a concentrically extending outer shaft hole part formed at the outer side of the rotor left end cover 12 and the rotor right end cover 11, and is smaller than the outer diameter of the concentrically extending outer shaft hole part formed at the outer side of the rotor left end cover 12 and the rotor right end cover 11.
According to the invention, when a differential condition does not exist, the differential planet wheel 8 of the differential 7 is equivalent to an equiarm lever, no rotation is generated, only the torque transmitted by the hollow rotor 6 of the motor is uniformly distributed to the two differential sun wheels 9 to drive the two differential sun wheels 9 to rotate, when a differential condition exists between left and right driving wheels, the upper and lower planet wheels 8 of the differential also rotate correspondingly, at this time, the two differential planet wheels 8 correspondingly drive the two differential sun wheels 9 to rotate at different speeds, and the two differential sun wheels 9 are used as power output ends at the left side and the right side of the differential to drive the left half shaft 1 and the right half shaft 2 to rotate together to drive and output power.
The invention can realize differential output in two directions by using one motor, has compact structure, saves space, simplifies a driving system, improves transmission efficiency, is environment-friendly and low in noise, and has great production practice significance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The differential function rotor is characterized by comprising a hollow rotor (6) matched with a stator (5), a differential (7), a left half shaft (1) and a right half shaft (2); the differential (7) is arranged inside the hollow rotor (6); the differential (7) comprises two axially arranged differential sun wheels (9) and two radially arranged differential planet wheels (8), and the upper side and the lower side of each differential sun wheel (9) are respectively meshed with the corresponding sides of the two differential planet wheels (8); the output shafts of the two differential sun gears (9) are correspondingly fixed with the left half shaft (1) and the right half shaft (2); the mounting shafts of the two differential planet wheels (8) are connected with the inner wall of the hollow rotor (6).
2. A differentially functioning rotor according to claim 1, characterized in that the output shafts of the two differential sun wheels (9) are splined to the left and right half shafts (1, 2).
3. A differential function rotor according to claim 2, wherein shaft ends of output shafts of two differential sun gears (9) form shaft connecting holes, and are spline-connected with the left half shaft (1) and the right half shaft (2) through the shaft connecting holes correspondingly.
4. A differential function rotor according to claim 1, characterized in that the output shafts of two differential sun gears (9) are connected with a second sliding bearing (14) mounted in the shaft holes of the rotor left end cover (12) and the rotor right end cover (11); the hollow rotor (6) is supported by a rotor left end cover (12) and a rotor right end cover (11).
5. A differential function rotor according to claim 1, characterized in that the hollow rotor (6), the differential (7), the left half shaft (1) and the right half shaft (2) are power output on the same axis, the hollow rotor (6) is the power input of the differential (7), and the two differential sun gears (9) are the power output ends of the left and right sides of the differential (7).
6. A differential function rotor as claimed in claim 1, wherein a bearing mounting hole is formed in an inner wall of the hollow rotor (6), and a first sliding bearing (7) is mounted outside a mounting shaft of the differential planetary gear (8), the first sliding bearing (7) being mounted in the bearing mounting hole.
7. A driving motor comprising a stator and a rotor cooperating with said stator, wherein said rotor employs a differential function rotor as claimed in any one of claims 1 to 6.
8. The drive motor according to claim 7, characterized in that a rolling bearing (13) is arranged coaxially between the rotor left end cover (12) and the rotor right end cover (11) and the corresponding stator left end cover (3) and the stator right end cover (4), respectively.
9. The driving motor according to claim 7, wherein the left half shaft (1) and the right half shaft (2) extend outwards from the shaft holes at the center of the stator left end cover (3) and the stator right end cover (4) correspondingly to output power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110079481.XA CN112928859A (en) | 2021-01-21 | 2021-01-21 | Differential function rotor and driving motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110079481.XA CN112928859A (en) | 2021-01-21 | 2021-01-21 | Differential function rotor and driving motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112928859A true CN112928859A (en) | 2021-06-08 |
Family
ID=76165516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110079481.XA Pending CN112928859A (en) | 2021-01-21 | 2021-01-21 | Differential function rotor and driving motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112928859A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115070276A (en) * | 2022-05-20 | 2022-09-20 | 国家石油天然气管网集团有限公司 | Welding machine in pipeline with electric differential mechanism |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1085239A2 (en) * | 1999-09-14 | 2001-03-21 | MAN Nutzfahrzeuge Aktiengesellschaft | Differential with conical gearing for commercial vehicles |
| JP2003127682A (en) * | 2001-10-22 | 2003-05-08 | Fuji Heavy Ind Ltd | Vehicle drive unit |
| CN101032921A (en) * | 2007-04-06 | 2007-09-12 | 上海中上汽车科技有限公司 | Different velocity motor drive system for electric car |
| CN101521431A (en) * | 2009-03-10 | 2009-09-02 | 江西江铃汽车集团实业有限公司 | Motor with double output shaft sleeves and differential function |
| CN101707412A (en) * | 2009-11-13 | 2010-05-12 | 北京科技大学 | Driving motor with function of differential speed output |
| CN203014575U (en) * | 2012-12-19 | 2013-06-19 | 耀马车业(中国)有限公司 | Brushless motor with built-in differential mechanism |
| CN103701253A (en) * | 2013-12-04 | 2014-04-02 | 张�杰 | Permanent-magnet motor for electric motor direct-drive axle |
| CN105186770A (en) * | 2015-08-01 | 2015-12-23 | 谷伟 | Differential dual-output motor |
| CN108183580A (en) * | 2018-02-08 | 2018-06-19 | 西安六环传动新能源科技有限公司 | A kind of permanent magnet synchronous motor of built-in spur-gear differential |
| CN108340737A (en) * | 2018-04-04 | 2018-07-31 | 清研新能源汽车工程中心（襄阳）有限公司 | A kind of electric axle assembly |
| US20200200247A1 (en) * | 2018-12-20 | 2020-06-25 | Lg Electronics Inc. | Driving apparatus for electric vehicle |
| CN112092540A (en) * | 2020-08-24 | 2020-12-18 | 北汽福田汽车股份有限公司 | Electric drive axle assembly and vehicle |
| CN214380504U (en) * | 2021-01-21 | 2021-10-08 | 清研众智测试技术（天津）有限公司 | Integrated differential driving motor |
-
2021
- 2021-01-21 CN CN202110079481.XA patent/CN112928859A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1085239A2 (en) * | 1999-09-14 | 2001-03-21 | MAN Nutzfahrzeuge Aktiengesellschaft | Differential with conical gearing for commercial vehicles |
| JP2003127682A (en) * | 2001-10-22 | 2003-05-08 | Fuji Heavy Ind Ltd | Vehicle drive unit |
| CN101032921A (en) * | 2007-04-06 | 2007-09-12 | 上海中上汽车科技有限公司 | Different velocity motor drive system for electric car |
| CN101521431A (en) * | 2009-03-10 | 2009-09-02 | 江西江铃汽车集团实业有限公司 | Motor with double output shaft sleeves and differential function |
| CN101707412A (en) * | 2009-11-13 | 2010-05-12 | 北京科技大学 | Driving motor with function of differential speed output |
| CN203014575U (en) * | 2012-12-19 | 2013-06-19 | 耀马车业(中国)有限公司 | Brushless motor with built-in differential mechanism |
| CN103701253A (en) * | 2013-12-04 | 2014-04-02 | 张�杰 | Permanent-magnet motor for electric motor direct-drive axle |
| CN105186770A (en) * | 2015-08-01 | 2015-12-23 | 谷伟 | Differential dual-output motor |
| CN108183580A (en) * | 2018-02-08 | 2018-06-19 | 西安六环传动新能源科技有限公司 | A kind of permanent magnet synchronous motor of built-in spur-gear differential |
| CN108340737A (en) * | 2018-04-04 | 2018-07-31 | 清研新能源汽车工程中心（襄阳）有限公司 | A kind of electric axle assembly |
| US20200200247A1 (en) * | 2018-12-20 | 2020-06-25 | Lg Electronics Inc. | Driving apparatus for electric vehicle |
| CN112092540A (en) * | 2020-08-24 | 2020-12-18 | 北汽福田汽车股份有限公司 | Electric drive axle assembly and vehicle |
| CN214380504U (en) * | 2021-01-21 | 2021-10-08 | 清研众智测试技术（天津）有限公司 | Integrated differential driving motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115070276A (en) * | 2022-05-20 | 2022-09-20 | 国家石油天然气管网集团有限公司 | Welding machine in pipeline with electric differential mechanism |
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Application publication date: 20210608 |
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