CN110905981A - Automatic transmission and electric automobile - Google Patents
Automatic transmission and electric automobile Download PDFInfo
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- CN110905981A CN110905981A CN201911167887.2A CN201911167887A CN110905981A CN 110905981 A CN110905981 A CN 110905981A CN 201911167887 A CN201911167887 A CN 201911167887A CN 110905981 A CN110905981 A CN 110905981A
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- input shaft
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 111
- 230000009977 dual effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Classifications
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/46—Gearings having only two central gears, connected by orbital 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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/70—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention relates to an automatic transmission and an electric automobile, and relates to the technical field of transmissions, wherein the automatic transmission comprises a first input shaft, a second input shaft, an output shaft, a first planetary gear mechanism and a second planetary gear mechanism; the first planetary gear mechanism comprises a first sun gear, a first planet carrier and a first gear ring, one of the first sun gear, the first planet carrier and the first gear ring is in transmission connection with the first input shaft, the other one of the first sun gear, the first planet carrier and the first gear ring is in transmission connection with the second input shaft, and the other one of the first sun gear, the first planet carrier and the first gear ring is fixedly connected with the transmission shell; the second planetary gear mechanism is connected between the second input shaft and the output shaft. The technical problems that power interruption is easy to occur when a two-gear transmission in the prior art is shifted, and further the whole vehicle dynamic performance and the driving comfort degree are affected are solved.
Description
Technical Field
The invention relates to the technical field of transmissions, in particular to an automatic transmission and an electric automobile.
Background
With the increasing exhaustion of petroleum resources and the increasing emphasis on environmental protection, the support of new energy industries by various countries is increasing, and the pure electric vehicle has the advantages of environmental friendliness, high energy conversion rate and the like, so that the application prospect is widely viewed and the pure electric vehicle is rapidly developed. For the energy-concerving and environment-protective demand of better performance electric automobile, each enterprise has vigorously developed two and keeps off the derailleur, and two keep off the derailleur and mainly use mechanical type automatic gearbox as the main on the existing market, because shift the poor quality, have the power interruption phenomenon, can't satisfy people to driving travelling comfort and dynamic property's compromise demand.
Disclosure of Invention
The invention aims to provide an automatic transmission and an electric automobile, and aims to solve the technical problem that the power interruption is easy to occur when a two-gear transmission in the prior art is shifted, so that the power performance and the driving comfort of the whole automobile are influenced.
In order to achieve the above object, in a first aspect, an embodiment provides an automatic transmission including a first input shaft, a second input shaft, an output shaft, a first planetary gear mechanism, and a second planetary gear mechanism;
the first planetary gear mechanism comprises a first sun gear, a first planet carrier and a first gear ring, one of the first sun gear, the first planet carrier and the first gear ring is in transmission connection with the first input shaft, the other one of the first sun gear, the first planet carrier and the first gear ring is in transmission connection with the second input shaft, and the other one of the first sun gear, the first planet carrier and the first gear ring is fixedly connected with the transmission shell;
a second planetary gear mechanism is connected between the second input shaft and the output shaft.
In an alternative embodiment, the first ring gear is in driving connection with the first input shaft.
In an alternative embodiment, the first planet carrier is in driving connection with the second input shaft.
In an alternative embodiment, the second planetary gear set comprises a second sun gear, a second planet carrier and a second ring gear, and the second input shaft is in driving connection with the second ring gear.
In an alternative embodiment, the output shaft is in driving connection with the second planet carrier.
In an alternative embodiment, the automatic transmission further includes a first positioning plate fixedly connected to the first sun gear, and the first positioning plate is fixedly connected to the transmission housing.
In an alternative embodiment, the automatic transmission further includes a second positioning plate fixedly connected to the second sun gear, and the second positioning plate is fixedly connected to the transmission housing.
In an alternative embodiment, the first input shaft is a hollow shaft, and the second input shaft is inserted into the first input shaft.
In a second aspect, an embodiment provides an electric vehicle, which includes an electric machine and the automatic transmission according to any one of the foregoing embodiments, wherein the electric machine is in transmission connection with the first input shaft or the second input shaft in the automatic transmission.
In an optional embodiment, the electric vehicle further comprises a double clutch, the motor is in transmission connection with the first input shaft through a first clutch in the double clutch, and the motor is in transmission connection with the second input shaft through a second clutch in the double clutch.
Compared with the prior art, the automatic transmission and the electric automobile provided by the invention have the following beneficial effects:
the invention provides an automatic transmission, which comprises a first input shaft, a second input shaft, an output shaft, a first planetary gear mechanism and a second planetary gear mechanism, wherein when one of a first sun gear, a first planet carrier and a first gear ring of the first planetary gear mechanism is fixedly connected with a transmission shell, the other two can relatively rotate, and the rotation speed ratio is not one. At this moment, one of the first sun gear, the first planet carrier and the first gear ring, which can rotate, is in transmission connection with the first input shaft, and the other of the first sun gear, the first planet carrier and the first gear ring, which can rotate, is in transmission connection with the second input shaft, so that the first input shaft and the second input shaft can mutually complete the transmission of power. And a second input shaft is also arranged to complete transmission connection with the output shaft through a second planetary gear mechanism so as to complete transmission of power from the second input shaft to the output shaft.
When the speed-regulating device is used specifically, taking the driving mechanism as an example, the motor can be in transmission connection with a first input shaft of the automatic transmission, and at the moment, the rotating speed of the motor is regulated through the first planetary gear mechanism and the second planetary gear mechanism together; when the rotating speed of the output shaft needs to be changed, the motor is switched to be in transmission connection with the second input shaft of the automatic transmission, and at the moment, the rotating speed of the motor is only regulated through the second planetary gear mechanism, so that gear switching is realized. Because the first input shaft and the second input shaft which rotate relatively are arranged, the motor can quickly complete gear switching through the clutch, the gear shifting smoothness is effectively guaranteed, power-off-free gear shifting is realized, and the driving comfort of a driver is improved.
Finally, the automatic transmission can complete the adjustment of three rotation speed ratios between the first input shaft and the second input shaft by selectively fixing the first sun gear, the first planet carrier or the first gear ring in the first planetary gear mechanism so as to meet the power requirements of different vehicles before and after gear shifting.
The technical advantages of the electric vehicle provided by the invention are the same as those generated by the automatic transmission, and are not described herein again.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a sectional view of an automatic transmission provided by an embodiment of the present invention.
Icon: 10-a first input shaft; 20-a second input shaft; 30-a first sun gear; 40-a first planet carrier; 50-a first gear ring; 60-a second sun gear; 70-a second planet carrier; 80-a second gear ring; 90-an output shaft; 110-a first positioning disk; 120-second puck.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1, the automatic transmission according to the present embodiment includes a first input shaft 10, a second input shaft 20, an output shaft 90, a first planetary gear mechanism and a second planetary gear mechanism, wherein when one of a first sun gear 30, a first carrier 40 and a first ring gear 50 of the first planetary gear mechanism is fixed to a transmission housing, the other two can rotate relatively, and the rotation speed ratio is not one. At this time, one of the first sun gear 30, the first carrier 40, and the first ring gear 50, which can rotate, is in transmission connection with the first input shaft 10, and the other of the first sun gear, the first carrier 40, and the first ring gear 50, which can rotate, is in transmission connection with the second input shaft 20, so that the first input shaft 10 and the second input shaft 20 can mutually complete power transmission. A second input shaft 20 is also provided to complete a drive connection with the output shaft 90 via a second planetary gear mechanism to complete the transfer of power from the second input shaft 20 to the output shaft 90.
When the speed-regulating device is used specifically, taking the driving mechanism as an example, the motor can be in transmission connection with the first input shaft 10 of the automatic transmission, and at the moment, the rotating speed of the motor is regulated through the first planetary gear mechanism and the second planetary gear mechanism together; when the rotating speed of the output shaft 90 needs to be changed, the motor is switched to be in transmission connection with the second input shaft 20 of the automatic transmission, and at the moment, the rotating speed of the motor is only regulated through the second planetary gear mechanism, so that gear switching is realized. Because the two first input shafts 10 and the second input shafts 20 which rotate relatively are arranged, the motor can more quickly complete gear switching through the clutch, the gear shifting smoothness is effectively guaranteed, power-off-free gear shifting is realized, and the driving comfort of a driver is improved.
Finally, the automatic transmission can accomplish the adjustment of three rotation speed ratios between the first input shaft 10 and the second input shaft 20 by selectively fixing the first sun gear 30, the first carrier 40 or the first ring gear 50 in the first planetary gear mechanism to meet the dynamic requirements of different vehicles before and after shifting.
In the present embodiment, a first planet gear is rotatably connected to the first carrier 40, and the first planet gear is engaged with the first ring gear 50 and also engaged with the first sun gear 30. The present embodiment preferably sets the rotation speed ratio of the first input shaft 10 and the second input shaft 20 (i.e. the rotation speed ratio of the first planetary gear mechanism) to be less than one, and when the motor is in transmission connection with the first input shaft 10, the vehicle is in a first gear mode, and at this time, greater power can be provided for the whole vehicle; when the motor is in transmission connection with the second input shaft 20, the vehicle is in a two-gear mode with higher speed, and compared with the first-gear driving mode, the economy of the whole vehicle is improved, and the endurance mileage of the whole vehicle is increased.
Specifically, the present embodiment will also describe in detail the specific structure of the automatic transmission as follows.
In the present embodiment, the first ring gear 50 is in driving connection with the first input shaft 10.
Specifically, a first connecting plate is fixed to the first ring gear 50, the first input shaft 10 is fixedly connected to the first connecting plate, an axis of the first input shaft 10 is collinear with an axis of the first planetary gear mechanism, and a rotation speed of the first input shaft 10 is a rotation speed of the first ring gear 50. At this time, the second input shaft 20 may be in transmission connection with one of the first sun gear 30 and the first carrier 40, so that a different transmission ratio, which is smaller than one, is formed between the first input shaft 10 and the second input shaft 20.
Preferably, the present embodiment provides for the first planet carrier 40 to be in driving connection with the second input shaft 20.
Specifically, the axis of the second input shaft 20 is collinear with the axis of the first planetary gear mechanism, and the rotation speed of the second input shaft 20 is the rotation speed of the first carrier 40. At this time, the first sun gear 30 is fixed to the transmission housing, and when the motor drives the first input shaft 10 or the second input shaft 20 to rotate, the first ring gear 50 and the first carrier 40 rotate in the same direction.
It should be noted that, in this embodiment, the second input shaft 20 may be configured to be in transmission connection with the first sun gear 30, at this time, the first planet carrier 40 needs to be configured to be fixedly connected with the transmission housing, and this configuration can also meet the requirement of the automatic transmission for two-gear speed regulation.
In the present embodiment, the second planetary gear mechanism includes a second sun gear 60, a second planet carrier 70 and a second ring gear 80, and the second input shaft 20 is in transmission connection with the second ring gear 80.
Specifically, the axis of the second planetary gear mechanism is collinear with the axis of the first planetary gear mechanism, the second ring gear 80 is fixedly connected with a second connecting disc, the second input shaft 20 is fixedly connected with the second connecting disc, and the rotating speed of the second input shaft 20 is the rotating speed of the second ring gear 80. The output shaft 90 at this time can be in transmission connection with any one of the second sun gear 60, the second planet carrier 70 and the second ring gear 80 to complete power transmission between the second input shaft 20 and the output shaft 90.
It should be noted that the present embodiment preferably provides that the output shaft 90 is in transmission connection with one of the second sun gear 60 and the second planet carrier 70, so that the transmission ratio of the second planetary gear mechanism is less than one.
In this embodiment, the output shaft 90 is drivingly connected to the second carrier 70.
At this time, the second sun gear 60 in the second planetary gear mechanism is fixedly connected with the transmission housing, and when the motor is in transmission connection with the first output shaft 90, the transmission ratio of the automatic transmission is the product of the transmission ratio between the first sun gear 30 and the first planet carrier 40 and the transmission ratio between the second sun gear 60 and the second planet carrier 70; when the motor is in transmission connection with the second output shaft 90, the transmission ratio of the automatic transmission is the transmission ratio between the second sun gear 60 and the second planet carrier 70.
It should be noted that the second carrier 70 is disposed on a side of the second sun gear 60 facing the first planetary gear mechanism, the second sun gear 60 is provided with a second shaft hole, and one end of the output shaft 90 is inserted into the second shaft hole from a side of the second planetary gear mechanism facing away from the first planetary gear mechanism and is fixedly connected to the second carrier 70.
In this embodiment, the first input shaft 10 is a hollow shaft, and the second input shaft 20 is inserted into a cavity of the first input shaft 10.
Specifically, the first input shaft 10 is located on the side of the first planetary gear mechanism facing away from the second planetary gear mechanism, the first sun gear 30 is provided with a first shaft hole, the second input shaft 20 is inserted into the first shaft hole after completing the fixed connection with the first planet carrier 40, and at this time, one end of the second input shaft 20 is located on the side of the first planetary gear mechanism facing away from the second planetary gear mechanism, and the other end is located on the side of the first planetary gear mechanism facing toward the second planetary gear mechanism and fixed with the second ring gear 80 in the second planetary gear mechanism.
In this embodiment, the automatic transmission further includes a first positioning plate 110 fixedly connected to the first sun gear 30, and the first positioning plate 110 is fixedly connected to the transmission housing.
Specifically, the first positioning plate 110 is disposed on a side of the first planetary gear mechanism facing away from the first connecting plate, and can be detachably connected to the transmission housing through bolts to complete the fixed installation of the first planetary gear mechanism in the transmission housing, and when the installed first planetary gear mechanism works, the first sun gear 30 and the transmission housing are constantly kept relatively fixed.
Alternatively, the first positioning plate 110 may be a brake, and the brake may work to fix the first sun gear 30 and the transmission housing relatively, so that the automatic transmission may perform two-gear speed regulation. Meanwhile, the automatic transmission can also stop the operation of the brake, so that the first input shaft 10 and the second input shaft 20 cannot complete power transmission through the first planetary gear mechanism, and when the motor is in transmission connection with the second input shaft 20, the first input shaft 10 and the second input shaft 20 cannot rotate relatively at a fixed transmission ratio, so that the power loss of the motor is reduced.
In this embodiment, the automatic transmission further includes a second positioning plate 120 fixedly connected to the second sun gear 60, and the second positioning plate 120 is fixedly connected to the transmission housing.
The second positioning plate 120 is disposed on a side of the second planetary gear mechanism away from the second connecting plate, the second positioning plate 120 is similar to a flange structure, and is provided with a connecting hole having an axis in the same direction as the axis of the second planetary gear mechanism, and the second positioning plate 120 is fixedly connected to an end of the transmission housing through the connecting hole.
Example two
The embodiment provides an electric automobile, which comprises an electric motor and an automatic transmission as described in any one of the foregoing embodiments, wherein the electric motor is in transmission connection with a first input shaft 10 or a second input shaft 20 in the automatic transmission to complete gear shifting.
The technical advantages of the electric vehicle provided by the present embodiment are the same as those of the automatic transmission described above, and are not described herein again.
It should be noted that the electric vehicle provided by the embodiment can also be applied to a conventional fuel vehicle, and only the motor needs to be replaced by an engine.
In this embodiment, the electric vehicle further includes a dual clutch, the motor is in transmission connection with the first input shaft 10 through a first clutch in the dual clutch, and the motor is in transmission connection with the second input shaft 20 through a second clutch in the dual clutch.
Specifically, when the first gear mode needs to be adjusted, the first clutch is controlled to be connected, and the second clutch is controlled to be disconnected. The double clutches can more quickly complete the switching between the first gear and the second gear, and further ensure the smoothness of gear shifting and unpowered interruption gear shifting.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167887.2A CN110905981A (en) | 2019-11-25 | 2019-11-25 | Automatic transmission and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167887.2A CN110905981A (en) | 2019-11-25 | 2019-11-25 | Automatic transmission and electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN110905981A true CN110905981A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911167887.2A Pending CN110905981A (en) | 2019-11-25 | 2019-11-25 | Automatic transmission and electric automobile |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007045670A1 (en) * | 2007-09-25 | 2009-04-02 | Schaeffler Kg | Transmission for e.g. traction drive of scooter, has sun gears concentrically arranged with input shaft and connected to input shaft over selective clutch elements, where clutch elements are free-wheel and centrifugal clutch respectively |
| CN102691759A (en) * | 2012-05-31 | 2012-09-26 | 洛阳拖拉机研究所有限公司 | Tractor differential planetary speed-regulating mechanism allowing for infinitely variable speeds |
| CN102720809A (en) * | 2011-03-30 | 2012-10-10 | 比亚迪股份有限公司 | A speed changer and a vehicle including the speed changer |
| CN110242714A (en) * | 2019-06-18 | 2019-09-17 | 北京航空航天大学 | A two-speed geared motor |
| CN211288628U (en) * | 2019-11-25 | 2020-08-18 | 绿传（北京）科技有限公司 | Automatic transmission and electric automobile |
-
2019
- 2019-11-25 CN CN201911167887.2A patent/CN110905981A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007045670A1 (en) * | 2007-09-25 | 2009-04-02 | Schaeffler Kg | Transmission for e.g. traction drive of scooter, has sun gears concentrically arranged with input shaft and connected to input shaft over selective clutch elements, where clutch elements are free-wheel and centrifugal clutch respectively |
| CN102720809A (en) * | 2011-03-30 | 2012-10-10 | 比亚迪股份有限公司 | A speed changer and a vehicle including the speed changer |
| CN102691759A (en) * | 2012-05-31 | 2012-09-26 | 洛阳拖拉机研究所有限公司 | Tractor differential planetary speed-regulating mechanism allowing for infinitely variable speeds |
| CN110242714A (en) * | 2019-06-18 | 2019-09-17 | 北京航空航天大学 | A two-speed geared motor |
| CN211288628U (en) * | 2019-11-25 | 2020-08-18 | 绿传（北京）科技有限公司 | Automatic transmission and electric automobile |
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Effective date of registration: 20210901 Address after: 100176 Room 501, 4th floor, building 3, courtyard 10, Ronghua South Road, Beijing Economic and Technological Development Zone, Daxing District, Beijing Applicant after: Lvchuan (Beijing) Automotive Technology Co.,Ltd. Address before: 100000 F16, 17th floor, No. 1, Zhongguancun Street, Haidian District, Beijing Applicant before: G-EDRIVE (BEIJING) TECHNOLOGY Co.,Ltd. |
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