CN215806121U - 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 PDF

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Publication number
CN215806121U
CN215806121U CN202121257597.XU CN202121257597U CN215806121U CN 215806121 U CN215806121 U CN 215806121U CN 202121257597 U CN202121257597 U CN 202121257597U CN 215806121 U CN215806121 U CN 215806121U
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gear
planet carrier
stage
planet
automatic transmission
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CN202121257597.XU
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Chinese (zh)
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马通
李想
张亮
谢文华
梁志伟
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Yinchuan Weili Transmission Technology Co ltd
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Yinchuan Weili Transmission Technology Co ltd
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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. An input shaft of the two-gear automatic transmission output by the planet carrier is connected with a driving motor, and the input shaft and an input-stage sun gear form a gear shaft in an integrated manner; the input end of the gear shaft is meshed with the first-stage planet gear, and the first-stage planet gear is meshed with the inner gear ring; the brake planet wheel is meshed with the inner gear ring; a first armature in the electromagnetic clutch is connected with a first steel sheet and fixed with the rotor, and the first steel sheet is connected with the planet carrier; a second armature in the electromagnetic brake is fixed with a second steel sheet, the second steel sheet is connected with a braking sun gear, and the braking sun gear is meshed with a braking planet gear; the planet carrier is connected with a second-stage driving wheel, and the second-stage driving wheel is meshed with a second-stage driven wheel; the planetary gear of the differential is connected with left and right driving half shafts.

Description

Two-gear automatic transmission output by planet carrier and new energy automobile using same
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 planetary gear type planetary gear transmission comprises an input shaft, a first-stage planetary gear, an inner gear ring, a planet carrier, a brake planetary gear, a transmission shell, an electromagnetic clutch, an electromagnetic brake, a brake sun gear, a second-stage driving wheel, a second-stage driven wheel and a differential shell;
the input shaft is connected with the driving motor, and the input shaft and the input-stage sun gear form a gear shaft in an integrated manner; the input end of the gear shaft is meshed with the first-stage planet gear, the first-stage planet gear is meshed with the inner gear ring, and the first-stage planet gear is arranged on the planet carrier; the brake planet gear is fixed on the transmission shell and is meshed with the inner gear ring; a first armature in the electromagnetic clutch is connected with a first steel sheet and fixed with a rotor, and the first steel sheet is connected with the planet carrier; a second armature in the electromagnetic brake is fixed with a second steel sheet, the second steel sheet is connected with the braking sun gear, the braking sun gear is meshed with the braking planet gear, and the electromagnetic brake is fixed on 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 shell; the planetary gear of the differential is connected with left and right driving half shafts.
Specifically, the input shaft is connected with the driving motor through a spline.
Specifically, the first armature in the electromagnetic clutch is connected with the first steel sheet through a bolt.
Further, the first steel sheet in the electromagnetic clutch is connected with the planet carrier through a spline.
Specifically, the second steel sheet in the electromagnetic brake is connected with the brake sun gear through a spline.
Further, the second armature in the electromagnetic brake is fixed with the second steel sheet through a bolt.
Specifically, the planet carrier is connected with the second-stage driving wheel through a spline.
Specifically, the second stage driven wheel is fixedly connected with the differential case through bolts.
Specifically, the rotor is connected to the input shaft by a flat key.
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 electromagnetic brake is electrified to generate a magnetic field to adsorb and fix a second armature in the electromagnetic brake, the second armature is fixed with a second steel sheet, the second steel sheet is connected with a braking sun gear, the braking sun gear is meshed with a braking planet gear, the braking planet gear is meshed with an inner gear ring, and the inner gear ring is finally fixed by fixing the braking sun gear; high-speed gear: the electromagnetic clutch works, the electromagnetic brake does not work, the electromagnetic clutch generates a magnetic field action through the electrification of the electromagnetic coil to adsorb and fix a first armature in the electromagnetic clutch, the first armature is fixed with a first steel sheet, and the first steel sheet is connected and fixed with the planet carrier, so that the input end of the gear shaft is fixedly connected with the planet carrier finally; reverse gear: the driving motor rotates reversely, the electromagnetic clutch does not work, and the electromagnetic brake works; neutral position: the electromagnetic clutch and the electromagnetic brake do not work.
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 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-first stage planet wheels; 3-inner gear ring; 4-a planet carrier; 5-brake planet wheel; 6-a transmission housing; 7-an electromagnetic clutch; 70-a rotor; 71-a first armature; 72-a first steel sheet; 73-a solenoid coil; 8-an electromagnetic brake; 9-braking the sun wheel; 10-a secondary driving wheel; 11-second stage driven wheel; 12-a differential housing; 13-Flat bond.
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, including: the planetary gear type planetary gear transmission comprises an input shaft 1, a first-stage planetary gear 2, an inner gear ring 3, a planet carrier 4, a brake planetary gear 5, a transmission housing 6, an electromagnetic clutch 7, an electromagnetic brake 8, a brake sun gear 9, a second-stage driving wheel 10, a second-stage driven wheel 11 and a differential housing 12;
the input shaft 1 is connected with a driving motor, and the input shaft 1 and the input-stage sun gear form a gear shaft in an integrated manner; the input end of the gear shaft is meshed with a first-stage planet gear 2, the first-stage planet gear 2 is meshed with an inner gear ring 3, and the first-stage planet gear 2 is arranged on a planet carrier 4; the brake planet wheel 5 is fixed on the transmission shell 6, and the brake planet wheel 5 is meshed with the inner gear ring 3; a first armature 71 in the electromagnetic clutch 7 is connected with a first steel sheet 72 and fixed with the rotor 70, and the first steel sheet 72 is connected with the planet carrier 4; a second armature in the electromagnetic brake 8 is fixed with a second steel sheet, the second steel sheet is connected with a braking sun gear 9, the braking sun gear 9 is meshed with the braking planet gear 5, and the electromagnetic brake 8 is fixed on the transmission housing 6; the planet carrier 4 is connected with a second-stage driving wheel 10, the second-stage driving wheel 10 is meshed with a second-stage driven wheel 11, and the second-stage driven wheel 11 is connected with a differential shell 12; the planetary gear of the differential is connected with left and right driving half shafts.
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 armature 71 in the above electromagnetic clutch 7 may be connected to the first steel sheet 72 by a bolt; further, the first steel plate 71 of the electromagnetic clutch 7 may be connected to the carrier 4 by a spline.
Specifically, the second steel plate in the electromagnetic brake 8 can be connected with the brake sun gear 9 through a spline; further, the second armature in the electromagnetic brake 8 may be fixed to the second steel plate by a bolt.
Specifically, the planet carrier 4 may be connected to the second-stage driving wheel 10 through a spline; specifically, the second driven wheel 11 may be fixedly connected to the differential case 12 by bolts.
Specifically, during actual assembly, the rotor 70 may be connected to the input shaft 1 through the flat key 13, so as to ensure that the input shaft 1 can drive the rotor 70 to rotate.
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 using the two-gear automatic transmission provided by the embodiment of the utility model is described in detail with the help of the attached drawing 1:
if the number of teeth of brake sun gear 9 can be Z1 and the number of teeth of ring gear 3 can be Z2, then a is the ratio of the number of teeth Z2 of ring gear 3 to the number of teeth Z1 of brake sun gear 9, i.e. a = Z2/Z1;
low-gear: the electromagnetic clutch 7 does not work, the electromagnetic brake 8 works, the electromagnetic brake 8 generates a magnetic field effect through the electrification of an electromagnetic coil to adsorb and fix a second armature in the electromagnetic brake 8, the second armature is fixed with a second steel sheet, the second steel sheet is connected with the braking sun gear 9, the braking sun gear 9 is meshed with the braking planet gear 5, the braking planet gear 5 is meshed with the inner gear ring 3, and therefore the inner gear ring 3 is finally fixed through fixing the braking sun gear 9;
the transmission ratio is as follows: i1=1+ a; a power transmission route: a driving motor, a gear shaft input end, a planet wheel, a planet carrier 4, a second-stage driving wheel 10, a second-stage driven wheel 11, a left and right driving half shaft;
high-speed gear: the electromagnetic clutch 7 works, the electromagnetic brake 8 does not work, the electromagnetic clutch 7 is electrified through the electromagnetic coil 73 to generate a magnetic field to act and adsorb and fix the first armature 71 in the electromagnetic clutch 7, the first armature 71 is fixed with the first steel sheet 72, and the first steel sheet 72 is connected and fixed with the planet carrier 4, so that the input end of the gear shaft is finally fixedly connected with the planet carrier 4;
the transmission ratio is as follows: i2= 1; a power transmission route: a driving motor, a gear shaft input end, a planet carrier 4 (planetary gear train integral rotation), a secondary driving wheel 10, a secondary driven wheel 11, a left and right driving half shaft;
reverse gear: the driving motor rotates reversely, the electromagnetic clutch 7 does not work, and the electromagnetic brake 8 works;
the transmission ratio is as follows: i3= - (1 + a); a power transmission route: a driving motor (reverse rotation) -a gear shaft input end-a planet wheel-a planet carrier 4-a second-stage driving wheel 10-a second-stage driven wheel 11-a left and right driving half shaft;
neutral position: neither the electromagnetic clutch 7 nor the electromagnetic brake 8 is operated.
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;
the electromagnetic clutch is controlled by current, so that the precision is high, the structure is simple, the reliability is good, and the service life is long;
and fourthly, the problems of hydraulic leakage and the like are not involved in the gear shifting process, the gear shifting is smooth, the comfort is better, 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 (10)

1. A two-speed automatic transmission with a planet carrier output, comprising: the planetary gear type planetary gear transmission comprises an input shaft, a first-stage planetary gear, an inner gear ring, a planet carrier, a brake planetary gear, a transmission shell, an electromagnetic clutch, an electromagnetic brake, a brake sun gear, a second-stage driving wheel, a second-stage driven wheel and a differential shell;
the input shaft is connected with the driving motor, and the input shaft and the input-stage sun gear form a gear shaft in an integrated manner; the input end of the gear shaft is meshed with the first-stage planet gear, the first-stage planet gear is meshed with the inner gear ring, and the first-stage planet gear is arranged on the planet carrier; the brake planet gear is fixed on the transmission shell and is meshed with the inner gear ring; a first armature in the electromagnetic clutch is connected with a first steel sheet and fixed with a rotor, and the first steel sheet is connected with the planet carrier; a second armature in the electromagnetic brake is fixed with a second steel sheet, the second steel sheet is connected with the braking sun gear, the braking sun gear is meshed with the braking planet gear, and the electromagnetic brake is fixed on 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 shell; the planetary gear of the differential is connected with left and right driving half shafts.
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 armature of the electromagnetic clutch is connected to the first steel plate by a bolt.
4. The planet carrier output two speed automatic transmission according to claim 1 or 3, wherein the first steel plate of the electromagnetic clutch is connected with the planet carrier through a spline.
5. The planet carrier output two speed automatic transmission according to claim 1, wherein the second steel plate in the electromagnetic brake is connected with the brake sun gear by a spline.
6. The planet carrier output two speed automatic transmission according to claim 1 or 5, wherein the second armature in the electromagnetic brake is fixed to the second steel plate by a bolt.
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 as set forth in claim 1, wherein said second stage driven wheel is fixedly connected to said differential housing by bolts.
9. The planet carrier output two speed automatic transmission according to claim 1, wherein the rotor is connected to the input shaft by a flat key.
10. A new energy automobile is characterized by comprising: a two-speed automatic transmission with planet carrier output according to any of claims 1-9.
CN202121257597.XU 2021-06-07 2021-06-07 Two-gear automatic transmission output by planet carrier and new energy automobile using same Active CN215806121U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121257597.XU CN215806121U (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
CN202121257597.XU CN215806121U (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
CN215806121U true CN215806121U (en) 2022-02-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121257597.XU Active CN215806121U (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) CN215806121U (en)

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