CN213270889U - Speed reducer for electric automobile - Google Patents
Speed reducer for electric automobile Download PDFInfo
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- CN213270889U CN213270889U CN202021895386.4U CN202021895386U CN213270889U CN 213270889 U CN213270889 U CN 213270889U CN 202021895386 U CN202021895386 U CN 202021895386U CN 213270889 U CN213270889 U CN 213270889U
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Abstract
The utility model discloses a reducer for an electric automobile, which comprises a front shell, a connecting plate, a rear shell, a box closing bolt, an input shaft assembly, an intermediate shaft assembly and an output shaft assembly; the front shell, the connecting plate and the rear shell are connected through a box closing bolt, and the input shaft assembly, the output shaft assembly and the middle shaft assembly are arranged in a cavity formed by the front shell and the rear shell; the input shaft assembly and the output shaft assembly are coaxially arranged and are driven by the intermediate shaft assembly, and the side face of the connecting plate is provided with the vent plug, so that the situation that rotating gear oil splashes into the air outlet channel in the gear meshing process is avoided. The utility model has the characteristics of compact structure, small, light in weight, can be applied to high-rotation-speed electric automobile actuating system.
Description
Technical Field
The utility model relates to a new energy automobile field specifically is a reduction gear for electric automobile.
Background
With the improvement of national requirements on energy conservation and environmental protection and the vigorous promotion of the development of the new energy automobile industry, the new energy automobile industry is developed vigorously, and the gap between the product market occupation rate and the market occupation rate of the traditional automobile industry is also reduced year by year. And new energy automobile's driving system adopts the motor to directly drive the scheme more, and along with the extensive promotion of new energy automobile application motorcycle type, the moment of torsion requirement to the motor is higher and higher, and the promotion that the motor moment of torsion required causes driving motor's manufacturing cost to increase, driving motor's increase in size, weight increase is unfavorable for the lightweight realization of whole car, is unfavorable for the spatial arrangement of whole car chassis simultaneously.
The speed reducer has the functions of reducing the rotating speed and improving the torque. Under the condition of transmitting the same torque, the driving scheme that the driving motor drives the speed reducer is adopted, and compared with the direct driving scheme of the driving motor, the driving motor has the advantages of being low in manufacturing cost, small in size and light in weight.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a simple structure, small that electric automobile used can realize promoting, the reduction gear of stabilizing the speed reduction with driving motor output torque.
The utility model adopts the technical proposal that: a reducer for an electric automobile comprises a front shell, a connecting plate, a rear shell, a box assembling bolt, an input shaft assembly, a middle shaft assembly and an output shaft assembly; the front shell, the connecting plate and the rear shell are connected through a box closing bolt, and the input shaft assembly, the output shaft assembly and the middle shaft assembly are arranged in a cavity formed by the front shell and the rear shell; the input shaft assembly and the output shaft assembly are coaxially arranged and are driven through a middle shaft assembly.
Further, the input shaft assembly comprises an input shaft, an input shaft gear and an input shaft bearing axially sleeved on the input shaft, the input shaft bearing is mounted on the front shell through a bearing pressing plate, the input shaft gear is arranged at the end part of the input shaft, a hole for inserting the end part of the output shaft is formed in the end part of the input shaft, and the input shaft is connected with the output shaft through the needle bearing; the output shaft assembly comprises an output shaft, an output shaft gear and an output shaft bearing which is sleeved on the output shaft along the axial direction, the output shaft is fixed on the connecting plate through the output shaft bearing, and the output shaft gear is adjacent to the input shaft gear; the intermediate shaft assembly comprises an intermediate shaft, an intermediate shaft driving gear, an intermediate shaft front bearing, an intermediate shaft driven gear and an intermediate shaft rear bearing, wherein the intermediate shaft front bearing, the intermediate shaft driven gear and the intermediate shaft rear bearing are axially sleeved on the intermediate shaft, the intermediate shaft driving gear is meshed with the output shaft gear, the intermediate shaft driven gear is meshed with the input shaft gear, and the intermediate shaft is fixed on the front shell and the connecting plate through the intermediate shaft front bearing and the intermediate shaft rear bearing.
Further, the output shaft is connected with an output flange through an external spline, and a spacer bush is arranged on the output shaft between the output flange and the output shaft bearing.
Further, oil seals are arranged between the input shaft and the front shell and between the output shaft and the rear shell.
Further, the input shaft and the input shaft gear, the output shaft and the output shaft gear, and the intermediate shaft driving gear are all of an integral structure.
Further, the intermediate shaft driven gear is in interference fit with the intermediate shaft.
Further, a vent plug is mounted on the side surface of the connecting plate.
The utility model discloses the beneficial effect who produces is: the utility model discloses reduction gear simple structure, small, light in weight, easily assembly, and have better reliability, can realize the operation requirement of high rotational speed low noise.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-input shaft, 2-input shaft oil seal, 3-input shaft assembly, 4-input shaft bearing, 5-input shaft gear, 6-bearing press plate, 7-front housing, 8-needle bearing, 9-output shaft, 10-output shaft gear, 11-breather plug, 12-output shaft assembly, 13-output shaft bearing, 14-spacer, 15-output shaft oil seal, 16-output flange, 17-box-combining bolt, 18-rear housing, 19-connecting plate, 20-intermediate shaft rear bearing, 21-intermediate shaft, 22-intermediate shaft driving gear, 23-intermediate shaft assembly, 24-intermediate shaft driven gear and 25-intermediate shaft front bearing.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The utility model relates to a reducer for an electric automobile, an input shaft and an output shaft are coaxially arranged, and the transmission of torque is realized through the structural arrangement of an input shaft assembly, an intermediate shaft assembly and an output shaft assembly;
as shown in fig. 1, the front housing 7, the connecting plate 19 and the rear housing 18 are connected by the box closing bolt 17, and the input shaft assembly 3, the intermediate shaft assembly 23 and the output shaft assembly 12 are disposed in a cavity formed by the front housing 7 and the rear housing 18. The input shaft assembly 3 comprises an input shaft 1, an input shaft gear 5, an input shaft oil seal 2 and an input shaft bearing 4, wherein the input shaft oil seal 2 and the input shaft bearing are axially sleeved on the input shaft 1; the intermediate shaft assembly 23 comprises an intermediate shaft 21, an intermediate shaft driving gear 22, an intermediate shaft front bearing 25, an intermediate shaft driven gear 24 and an intermediate shaft rear bearing 20, wherein the intermediate shaft front bearing 25, the intermediate shaft driven gear 24 and the intermediate shaft rear bearing are axially sleeved on the intermediate shaft 21; the output shaft assembly 12 comprises an output shaft 9, an output shaft gear 10, a needle bearing 8, an output shaft bearing 13, a spacer 14, an output shaft oil seal 15 and an output flange 16, wherein the needle bearing 8, the output shaft bearing 13, the spacer 14, the output shaft oil seal 15 and the output flange are axially sleeved on the output shaft 9. The input shaft 1 is connected with an internal spline of an output shaft of a motor through an external spline, so that torque is transmitted to the input shaft 1, an input shaft gear 5 is arranged at the end part of the input shaft 1 and is in an integrated structure with the input shaft 1, the input shaft gear 5 is meshed with an intermediate shaft driven gear 24 to transmit the torque to the intermediate shaft driven gear 24, the intermediate shaft driven gear 24 is in interference fit with an intermediate shaft 21, the intermediate shaft driven gear 24 transmits the torque to an intermediate shaft driving gear 22 through the intermediate shaft 21, the intermediate shaft 21 and the intermediate shaft driving gear 22 are in an integrated structure, the intermediate shaft driving gear 22 is meshed with an output shaft gear 10 to transmit the torque to the output shaft gear 10, and the output shaft gear 10 is adjacent to the input shaft gear 5 and is in an. The input shaft 1 and the output shaft 9 are coaxially arranged, and one end of the output shaft 9 is inserted into a groove at one end of the input shaft 1 and connected through a needle bearing 8. The output shaft 9 is connected with the output flange 16 through an external spline and an internal spline, the torque is transmitted to the output flange 16, and the output flange 16 finally realizes the output of the torque; the spacer 14 is installed between the output shaft bearing 13 and the output shaft oil seal 15. The input shaft bearing 4 is fixedly arranged on the front shell 7 through a bearing pressing plate 6, and the bearing pressing plate 6 is fixed on the front shell 7 through an inner hexagon screw; the input shaft oil seal 2 is arranged at the joint of the surface of the front shell and the input shaft 1, so that lubricating oil in the speed reducer assembly box body is prevented from overflowing from an input end and external dust is prevented from entering the speed reducer box body from the input end; the output shaft oil seal 15 is arranged at the joint of the surface of the rear shell and the output shaft 9, so that the lubricating oil in the speed reducer assembly box body is prevented from overflowing from the output end and external dust is prevented from entering the speed reducer box body from the output end; the vent plug 11 is mounted on the connecting plate 19, so that the rotary gear oil is prevented from splashing into the air outlet channel in the gear meshing process.
The utility model meets the performance requirements of service life and reliability through design calculation; through reasonable selection of the bearing and optimal design of the gear, the size is minimum, the space limitation requirement of the speed reducer on the whole vehicle is met, the structure is compact, the size is small, the weight is light, the requirement of high rotating speed of 7000rpm of input motor rotating speed can be met, and the average efficiency of the speed reducer assembly is not less than 95%.
Claims (7)
1. A reducer for an electric automobile comprises a front shell, a connecting plate, a rear shell, a box assembling bolt, an input shaft assembly, a middle shaft assembly and an output shaft assembly; the method is characterized in that: the front shell, the connecting plate and the rear shell are connected through a box closing bolt, and the input shaft assembly, the output shaft assembly and the middle shaft assembly are arranged in a cavity formed by the front shell and the rear shell; the input shaft assembly and the output shaft assembly are coaxially arranged and are driven through a middle shaft assembly.
2. A decelerator for an electric vehicle as claimed in claim 1, wherein: the input shaft assembly comprises an input shaft, an input shaft gear and an input shaft bearing axially sleeved on the input shaft, the input shaft bearing is mounted on the front shell through a bearing pressing plate, the input shaft gear is arranged at the end part of the input shaft, a hole for inserting the end part of the output shaft is formed in the end part of the input shaft, and the input shaft is connected with the output shaft through a needle bearing; the output shaft assembly comprises an output shaft, an output shaft gear and an output shaft bearing which is sleeved on the output shaft along the axial direction, the output shaft is fixed on the connecting plate through the output shaft bearing, and the output shaft gear is adjacent to the input shaft gear; the intermediate shaft assembly comprises an intermediate shaft, an intermediate shaft driving gear, an intermediate shaft front bearing, an intermediate shaft driven gear and an intermediate shaft rear bearing, wherein the intermediate shaft front bearing, the intermediate shaft driven gear and the intermediate shaft rear bearing are axially sleeved on the intermediate shaft, the intermediate shaft driving gear is meshed with the output shaft gear, the intermediate shaft driven gear is meshed with the input shaft gear, and the intermediate shaft is fixed on the front shell and the connecting plate through the intermediate shaft front bearing and the intermediate shaft rear bearing.
3. A decelerator for an electric vehicle as claimed in claim 2, wherein: the output shaft is connected with the output flange through an external spline, and a spacer bush is arranged on the output shaft between the output flange and the output shaft bearing.
4. A decelerator for an electric vehicle as claimed in claim 2, wherein: and oil seals are arranged between the input shaft and the front shell and between the output shaft and the rear shell.
5. A decelerator for an electric vehicle as claimed in claim 2, wherein: the input shaft and the input shaft gear, the output shaft and the output shaft gear, and the intermediate shaft driving gear are all of an integral structure.
6. A decelerator for an electric vehicle as claimed in claim 2, wherein: the intermediate shaft driven gear is in interference fit with the intermediate shaft.
7. A decelerator for an electric vehicle as claimed in claim 1, wherein: and a vent plug is arranged on the side surface of the connecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021895386.4U CN213270889U (en) | 2020-09-03 | 2020-09-03 | Speed reducer for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021895386.4U CN213270889U (en) | 2020-09-03 | 2020-09-03 | Speed reducer for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213270889U true CN213270889U (en) | 2021-05-25 |
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ID=75937459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021895386.4U Active CN213270889U (en) | 2020-09-03 | 2020-09-03 | Speed reducer for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213270889U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251062A (en) * | 2021-05-28 | 2021-08-13 | 山东创新板材有限公司 | Drive operation device and installation method |
| WO2023010945A1 (en) * | 2021-08-03 | 2023-02-09 | 精进电动科技股份有限公司 | Electric drive assembly for vehicle and new energy vehicle |
-
2020
- 2020-09-03 CN CN202021895386.4U patent/CN213270889U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251062A (en) * | 2021-05-28 | 2021-08-13 | 山东创新板材有限公司 | Drive operation device and installation method |
| WO2023010945A1 (en) * | 2021-08-03 | 2023-02-09 | 精进电动科技股份有限公司 | Electric drive assembly for vehicle and new energy vehicle |
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