CN215763088U - Two-gear automatic transmission output by planet carrier and new energy automobile using same - Google Patents
Two-gear automatic transmission output by planet carrier and new energy automobile using same Download PDFInfo
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- CN215763088U CN215763088U CN202121257548.6U CN202121257548U CN215763088U CN 215763088 U CN215763088 U CN 215763088U CN 202121257548 U CN202121257548 U CN 202121257548U CN 215763088 U CN215763088 U CN 215763088U
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- planet carrier
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- planet
- wet clutch
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Abstract
A two-gear automatic transmission output by a planet carrier and a new energy automobile using the same relate to the technical field of transmissions, and have the advantages of improved comprehensive efficiency, increased driving mileage, short hundred kilometers of acceleration time, strong climbing capacity, high maximum speed, small motor size and low cost. The input shaft of the two-gear automatic transmission output by the planet carrier is connected with the driving motor, the input shaft is fixedly connected with the sun wheel, the sun wheel is meshed with the planet wheel, the planet wheel is meshed with the inner gear ring, and the planet wheel is arranged on the planet carrier; a first steel sheet in the wet clutch is connected with the inner gear ring, and a first friction sheet in the wet clutch is connected with the planet carrier; a second friction plate in the wet brake is connected with the inner gear ring, and a second steel sheet in the wet clutch is connected with the transmission shell; the planet carrier is connected with a second-stage driving wheel, the second-stage driving wheel is meshed with a second-stage driven wheel, and the second-stage driven wheel is connected with a differential mechanism; the planetary gear of the differential is connected with a first driving half shaft and a second driving half shaft.
Description
Technical Field
The utility model relates to the technical field of new energy automobile transmissions, in particular to a two-gear automatic transmission output by a planet carrier and a new energy automobile applying the two-gear automatic transmission.
Background
A transmission system of a new energy automobile (including a pure electric automobile, a hybrid electric automobile and the like) generally adopts a fixed speed ratio transmission, and the transmission mode has a simple structure and low cost. However, when a fixed-speed-ratio transmission is adopted, high requirements are provided for a driving motor, namely, high instantaneous torque is provided in a constant torque area, and high running speed is provided in a constant power area, so that the requirements of automobile acceleration, climbing and high-speed running are met.
Meanwhile, the fixed speed ratio transmission has larger efficiency reduction amplitude of the driving motor under the load conditions of the highest speed and the lowest speed, and the loss of the motor, the electric control and the battery is seriously increased. When the motor reaches the limit rotating speed, the motor cannot continuously rise, so that the highest speed is restricted; in addition, when the automobile runs at high speed, the motor of the fixed-speed-ratio transmission needs to keep extremely high rotating speed, and the fixed-speed-ratio transmission is unfavorable for noise control and endurance mileage.
In conclusion, the inventor of the application finds that the two-gear automatic transmission is the main trend of future electric vehicles, the highest driving speed of the vehicles is improved, the driving motor can work in a high-efficiency area all the time, and the system efficiency of the transmission is higher relative to the fixed speed ratio, so that the vehicles can obtain longer pure electric endurance mileage; in addition, the low-speed gear can have a better acceleration level when the automobile starts, the high-speed gear reduces the working speed of the motor while meeting the highest speed of the automobile, the NVH performance of the whole automobile is improved, and meanwhile, the driving motor in the automobile can be more miniaturized and slowed down, so that the cost of the motor and the cost of the inverter are reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a two-gear automatic transmission output by a planet carrier and a new energy automobile using the same, which have the advantages of improved comprehensive efficiency, increased endurance mileage, short hundred kilometers of acceleration time, strong climbing capability, high maximum speed, small motor volume and low cost.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a two-speed automatic transmission with a planet carrier output, comprising: the transmission comprises an input shaft, a sun gear, a planet gear, an inner gear ring, a planet carrier, a wet clutch, a wet brake, a transmission shell, a secondary driving wheel, a secondary driven wheel and a differential mechanism;
the input shaft is connected with a driving motor, the input shaft is fixedly connected with the sun wheel, the sun wheel is meshed with the planet wheel, the planet wheel is meshed with the inner gear ring, and the planet wheel is arranged on a planet carrier; a first steel sheet in the wet clutch is connected with the inner gear ring, and a first friction sheet in the wet clutch is connected with the planet carrier; a second friction plate in the wet brake is connected with the inner gear ring, and a second steel sheet in the wet clutch is connected with the transmission shell; the planet carrier is connected with the second-stage driving wheel, the second-stage driving wheel is meshed with the second-stage driven wheel, and the second-stage driven wheel is connected with the differential mechanism; the planetary gear of the differential is connected with a first driving half shaft and a second driving half shaft.
Specifically, the input shaft is connected with the driving motor through a spline.
Specifically, the first steel sheet in the wet clutch is connected with the inner gear ring through a spline.
Further, the first friction plate in the wet clutch is connected with the carrier through a spline.
Specifically, the second friction plate in the wet brake is connected with the ring gear through a spline.
Further, the second steel plate in the wet clutch is connected with the transmission housing through a spline.
Specifically, the planet carrier is connected with the second-stage driving wheel through a spline.
Further, the second-stage driven wheel is fixedly connected with the differential through bolts.
Compared with the prior art, the two-gear automatic transmission with the output of the planet carrier has the following advantages:
in the two-gear automatic transmission with the output of the planet carrier, the low gear is as follows: the wet clutch does not work, the wet brake works, a second piston, a second friction plate and a second steel sheet in the wet brake are pushed to be in contact through the action of hydraulic oil to generate friction force, and the inner gear ring is fixedly connected with the shell; high-speed gear: the wet clutch works, the wet brake does not work, a first piston, a first friction plate and a first steel sheet in the wet clutch are pushed to be in contact through the action of hydraulic oil to generate friction force, and the planet carrier and the inner gear ring are fixedly connected; reverse gear: the driving motor rotates reversely, the wet clutch does not work, and the wet brake works; neutral position: the wet clutch and the wet brake are not operated.
A new energy automobile comprises: a two-speed automatic transmission with a planet carrier output as described in any one of the above.
Compared with the prior art, the new energy automobile and the two-gear automatic transmission output by the planet carrier have the same advantages, and the detailed description is omitted.
Drawings
FIG. 1 is a schematic diagram of a two speed automatic transmission with carrier output provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a two-speed automatic transmission with a planet carrier output according to an embodiment of the utility model.
Reference numerals:
1-an input shaft; 2-a sun gear; 3-a planet wheel; 4-inner gear ring; 5-a planet carrier; 6-wet clutch; 7-a wet brake; 8-a transmission housing; 9-a secondary driving wheel; 10-second stage driven wheel; 11-a differential; 121-a first drive half shaft; 122-second drive half shaft.
Detailed Description
For convenience of understanding, the two-gear automatic transmission with the output of the planet carrier and the new energy automobile using the two-gear automatic transmission provided by the embodiment of the utility model are described in detail below with reference to the attached drawings in the specification.
An embodiment of the present invention provides a two-gear automatic transmission with a planetary carrier output, as shown in fig. 1 and 2, including: an input shaft 1, a sun gear 2, a planet gear 3, an inner gear ring 4, a planet carrier 5, a wet clutch 6, a wet brake 7, a transmission housing 8, a secondary driving wheel 9, a secondary driven wheel 10 and a differential 11;
the input shaft 1 is connected with a driving motor, the input shaft 1 is fixedly connected with a sun wheel 2, the sun wheel 2 is meshed with a planet wheel 3, the planet wheel 3 is meshed with an inner gear ring 4, and the planet wheel 3 is arranged on a planet carrier 5; a first steel sheet in the wet clutch 6 is connected with the inner gear ring 4, and a first friction sheet in the wet clutch 6 is connected with the planet carrier 5; a second friction plate in the wet brake 7 is connected with the inner gear ring 4, and a second steel sheet in the wet clutch 7 is connected with the transmission shell 8; the planet carrier 5 is connected with a second-stage driving wheel 9, the second-stage driving wheel 9 is meshed with a second-stage driven wheel 10, and the second-stage driven wheel 10 is connected with a differential 11; the planetary gears of differential 1 are connected to a first drive axle shaft 121 and a second drive axle shaft 122.
Specifically, during actual assembly, the input shaft 1 may be connected to the driving motor through a spline, so as to ensure that the power of the driving motor can be smoothly transmitted to the input shaft 1.
Specifically, the first steel sheet in the wet clutch 6 described above may be connected to the ring gear 4 by splines. Further, the first friction plate in the wet clutch 6 may be connected to the carrier 5 by a spline.
Specifically, the second friction plate in the wet brake 7 described above may be connected to the ring gear 4 by a spline. Further, the second steel plate in the wet clutch 7 may be connected to the transmission case 8 by a spline.
Specifically, the planet carrier 5 may be connected to the second stage driving wheel 9 through a spline. Further, the second stage driven wheel 10 may be fixedly connected to the differential 11 by bolts.
An embodiment of the present invention further provides a new energy vehicle, including: a two-speed automatic transmission with a planet carrier output as described in any one of the above.
The working principle of the two-gear automatic transmission with the output of the planet carrier and the new energy automobile applying the two-gear automatic transmission provided by the embodiment of the utility model is described in detail below by means of the attached drawings 1 and 2:
if the number of teeth of sun gear 2 may be Z1 and the number of teeth of ring gear 4 may be Z2, then a is the ratio of the number of teeth Z2 of ring gear 4 to the number of teeth Z1 of sun gear 2, i.e., a = Z2/Z1;
low-gear: the wet clutch 6 does not work, the wet brake 7 works, a second piston, a second friction plate and a second steel sheet in the wet brake 7 are pushed to be contacted through the action of hydraulic oil to generate friction force, and the inner gear ring 4 is fixedly connected with the shell;
the transmission ratio is as follows: i1=1+ a; a power transmission route: a driving motor, an input shaft 1, a sun gear 2, a planet gear, a planet carrier 5, a second-stage driving wheel 9, a second-stage driven wheel 10, a first driving half shaft 121 and a second driving half shaft 122;
high-speed gear: the wet clutch 6 works, the wet brake 7 does not work, a first piston, a first friction plate and a first steel sheet in the wet clutch 6 are pushed to be in contact through the action of hydraulic oil to generate friction force, and the planet carrier 5 and the inner gear ring 4 are fixedly connected;
the transmission ratio is as follows: i2= 1; a power transmission route: the driving motor-the input shaft 1-the sun gear 2, the planet carrier 5 (the planetary gear train rotates integrally) -the secondary driving wheel 9-the secondary driven wheel 10-the first driving half shaft 121 and the second driving half shaft 122;
reverse gear: the driving motor rotates reversely, the wet clutch 6 does not work, and the wet brake 7 works;
the transmission ratio is as follows: i3= - (1 + a); a power transmission route: driving motor (reverse rotation) -input shaft 1-sun gear 2-planet carrier 5-second stage driving wheel 9-second stage driven wheel 10-first driving half shaft 121 and second driving half shaft 122;
neutral position: neither the wet clutch 6 nor the wet brake 7 is in operation.
In summary, the two-gear automatic transmission output by the planet carrier and the new energy automobile using the same provided by the embodiment of the utility model mainly have the following advantages:
the two-gear gearbox is used, so that the motor can work in a high-efficiency range, namely, the driving motor can be used efficiently, the cruising ability of the new energy automobile is improved, and the economy is good;
secondly, the kilometer acceleration time is short, the climbing capability is strong, and the highest vehicle speed is high;
thirdly, the wet clutch is lubricated by oil immersion, so that the reliability is good and the service life is long;
and fourthly, the hydraulic system is used for controlling the wet clutch to shift, and unpowered interruption shifting can be realized, so that smooth shifting is guaranteed, the comfort is good, and the requirement of the vehicle on the comfort can be met.
It should be added here that NVH is english abbreviation of Noise, Vibration and Harshness (Noise, Vibration, Harshness). This is a comprehensive measure of the quality of a vehicle's manufacture and gives the vehicle user the most immediate and surface experience. The NVH problem of vehicles is one of the concerns of various large vehicle manufacturing enterprises and component enterprises in the international automotive industry. Statistics show that 1/3 failure problem of the whole automobile is related to NVH problem of the automobile, and nearly 20% of research and development cost of each large company is consumed for solving the NVH problem of the automobile.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A two-speed automatic transmission with a planet carrier output, comprising: the transmission comprises an input shaft, a sun gear, a planet gear, an inner gear ring, a planet carrier, a wet clutch, a wet brake, a transmission shell, a secondary driving wheel, a secondary driven wheel and a differential mechanism;
the input shaft is connected with a driving motor, the input shaft is fixedly connected with the sun wheel, the sun wheel is meshed with the planet wheel, the planet wheel is meshed with the inner gear ring, and the planet wheel is arranged on a planet carrier; a first steel sheet in the wet clutch is connected with the inner gear ring, and a first friction sheet in the wet clutch is connected with the planet carrier; a second friction plate in the wet brake is connected with the inner gear ring, and a second steel sheet in the wet clutch is connected with the transmission shell; the planet carrier is connected with the second-stage driving wheel, the second-stage driving wheel is meshed with the second-stage driven wheel, and the second-stage driven wheel is connected with the differential mechanism; the planetary gear of the differential is connected with a first driving half shaft and a second driving half shaft.
2. The planet carrier output two speed automatic transmission according to claim 1, wherein the input shaft is connected to the drive motor by a spline.
3. The planet carrier output two speed automatic transmission according to claim 1, wherein the first steel plate in the wet clutch is connected with the ring gear by a spline.
4. A planet carrier output two speed automatic transmission according to claim 1 or 3, wherein the first friction plate in the wet clutch is connected to the planet carrier by a spline.
5. The planet carrier output two speed automatic transmission according to claim 1, wherein the second friction plate in the wet brake is connected with the ring gear by a spline.
6. The planet carrier output two speed automatic transmission according to claim 1 or 5, wherein the second steel plate in the wet clutch is connected with the transmission housing by a spline.
7. The planet carrier output two speed automatic transmission according to claim 1, wherein the planet carrier is connected to the second stage drive pulley by a spline.
8. A planet carrier output two speed automatic transmission according to claim 1 or 7, wherein the second stage driven wheel is fixedly connected to the differential by bolts.
9. A new energy automobile is characterized by comprising: a two-speed automatic transmission with planet carrier output according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121257548.6U CN215763088U (en) | 2021-06-07 | 2021-06-07 | Two-gear automatic transmission output by planet carrier and new energy automobile using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121257548.6U CN215763088U (en) | 2021-06-07 | 2021-06-07 | Two-gear automatic transmission output by planet carrier and new energy automobile using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215763088U true CN215763088U (en) | 2022-02-08 |
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ID=80099563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121257548.6U Active CN215763088U (en) | 2021-06-07 | 2021-06-07 | Two-gear automatic transmission output by planet carrier and new energy automobile using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215763088U (en) |
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2021
- 2021-06-07 CN CN202121257548.6U patent/CN215763088U/en active Active
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