CN215596334U - Two-stage speed reducer for pure electric passenger vehicle and pure electric passenger vehicle - Google Patents
Two-stage speed reducer for pure electric passenger vehicle and pure electric passenger vehicle Download PDFInfo
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- CN215596334U CN215596334U CN202121860415.8U CN202121860415U CN215596334U CN 215596334 U CN215596334 U CN 215596334U CN 202121860415 U CN202121860415 U CN 202121860415U CN 215596334 U CN215596334 U CN 215596334U
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Abstract
Pure electric passenger car is with two-stage reduction gear, its characterized in that: the planetary pinion mechanism and the cylindrical gear pair mechanism are respectively arranged in a speed reducer shell, and the cylindrical gear pair mechanism is connected with a differential mechanism assembly. Compared with the two-stage speed reducer in the prior art, the speed reducer has the advantages that the supporting shaft is reduced, the transmission error and the running noise of the gear can be effectively reduced, the NVH performance of the speed reducer assembly is improved under the condition that the machining precision of the gear is the same, and the light weight and the spatial arrangement of the speed reducer assembly on the whole vehicle are facilitated. The utility model further provides a pure electric passenger vehicle.
Description
Technical Field
The utility model relates to a two-stage speed reducer for a pure electric passenger vehicle and the pure electric passenger vehicle, and belongs to the technical field of pure electric passenger vehicles.
Background
At present, the speed reducer for the pure electric passenger car generally adopts two pairs of cylindrical gears to carry out two-stage speed reduction, each pair of gears are respectively distributed on different support shafts, and each support shaft is supported on a speed reducer shell by a front bearing and a rear bearing. The concrete structure and the transmission principle are explained as follows: the primary transmission driving gear is fixedly arranged on the input shaft or is integrated with the input shaft, and the input shaft is supported on the speed reducer shell through a front bearing and a rear bearing; the primary transmission driven gear and the secondary transmission driving gear are fixedly arranged on the intermediate shaft or are integrated with the intermediate shaft, and the intermediate shaft is supported on the reducer shell through a front bearing and a rear bearing; the secondary transmission driven gear is fixedly arranged on the differential. The power output by the motor is input to the speed reducer through the input shaft, primary speed reduction is carried out through the primary transmission driving gear and the primary transmission driven gear, secondary speed reduction is carried out through the secondary transmission driving gear and the secondary transmission driven gear, and the power is output through the speed reducer finally. Along with the great improvement of the rotating speed of the motor, the transmission speed ratio of the finished automobile is required to be increased, the center distance of the gear needs to be further increased, and the size of a shell of the speed reducer needs to be correspondingly increased so as to meet the spatial arrangement of the gear. In order to meet the noise requirement of the reducer assembly, the gear machining precision is guaranteed to be above 6-level precision.
SUMMERY OF THE UTILITY MODEL
Compared with the two-stage speed reducer in the prior art, the two-stage speed reducer for the pure electric passenger vehicle and the pure electric passenger vehicle provided by the utility model have the advantages that the supporting shaft is reduced, the transmission error and the running noise of the gear can be effectively reduced, the NVH (noise, vibration and harshness) performance of the speed reducer assembly is improved under the condition that the gear machining precision is the same, and the light weight of the speed reducer assembly and the spatial arrangement on the whole vehicle are facilitated.
In order to achieve the purpose, the utility model adopts the technical scheme that:
pure electric passenger car is with two-stage reduction gear, its characterized in that: the planetary pinion mechanism and the cylindrical gear pair mechanism are respectively arranged in a speed reducer shell, and the cylindrical gear pair mechanism is connected with a differential mechanism assembly.
Preferably, the planetary auxiliary gear mechanism comprises a power input shaft connected with the output end of the motor, a sun gear coaxially fixed with the power input shaft, a planet gear meshed with the periphery of the sun gear, a planet carrier assembled with the planet gear and an inner gear ring meshed with the planet gear and fixed on the shell of the speed reducer, and a driving wheel in the cylindrical gear auxiliary mechanism is coaxially fixed on a supporting shaft of the planet carrier.
Preferably, the power input shaft is supported in the reducer case by one bearing, and the support shaft of the carrier is supported in the reducer case by two bearings.
Preferably, the cylindrical gear pair mechanism comprises a driving wheel coaxially fixed on a supporting shaft of the planet carrier and a driven wheel meshed with the driving wheel, and the driven wheel is connected with the differential assembly.
Preferably, the differential assembly comprises a double-ended bevel gear coaxially fixed with the driven wheel, an output bevel gear meshed with the double-ended bevel gear, and a power output shaft coaxially fixed with the output bevel gear.
Preferably, the double-ended bevel gear, the output bevel gear and the power output shaft are all mounted on a mounting rack, the mounting rack is mounted on the reducer shell, and the power output shaft extends out of the reducer shell.
Pure electric passenger car includes two-stage reduction gear, its characterized in that: the two-stage speed reducer is the two-stage speed reducer for the pure electric passenger car.
The utility model has the beneficial effects that:
according to the two-stage speed reducer for the pure electric passenger vehicle, the planetary pinion mechanism is adopted for first-stage speed reduction, the cylindrical gear pair mechanism is adopted for second-stage speed reduction, power output by the motor is subjected to first-stage speed reduction through the planetary pinion mechanism and then is transmitted to the cylindrical gear pair mechanism for second-stage speed reduction, the power is output through the differential assembly after speed reduction, a driving wheel in the cylindrical gear pair mechanism and the planetary pinion mechanism are coaxially fixed, a supporting shaft is reduced compared with the two-stage speed reducer in the prior art, transmission errors and noise generated during gear operation can be effectively reduced, and the NVH performance of the speed reducer assembly is improved under the condition that the gear machining accuracy is the same.
The structure of one supporting shaft is reduced, the structure is more compact, the arrangement space required by the transmission part of the speed reducer is small, the space occupancy rate is low, the overall dimension of the speed reducer assembly can be synchronously reduced, and the light weight and the space arrangement on the whole vehicle of the speed reducer assembly are facilitated.
Drawings
Fig. 1 is a schematic view of a transmission structure of a two-stage speed reducer for a pure electric passenger vehicle according to the present invention.
Detailed Description
An embodiment of the present invention will be described in detail with reference to fig. 1.
Pure electric passenger car is with two-stage reduction gear, its characterized in that: the planetary auxiliary gear mechanism comprises a planetary auxiliary gear mechanism 1 and a cylindrical gear auxiliary mechanism 2, wherein the planetary auxiliary gear mechanism 1 is used for one-stage speed reduction and is coaxially connected with the output end of a motor, the cylindrical gear auxiliary mechanism 2 is used for two-stage speed reduction, a driving wheel in the cylindrical gear auxiliary mechanism 2 is coaxially fixed with the planetary auxiliary gear mechanism 1, the planetary auxiliary gear mechanism 1 and the cylindrical gear auxiliary mechanism 2 are respectively arranged in a speed reducer shell 3, and the cylindrical gear auxiliary mechanism 2 is connected with a differential mechanism assembly 4.
The primary speed reduction of the two-stage speed reducer for the pure electric passenger vehicle adopts the planet pinion mechanism 1, the secondary speed reduction adopts the cylindrical gear pair mechanism 2, the power output by the motor is subjected to primary speed reduction through the planet pinion mechanism 1 and then is transmitted to the cylindrical gear pair mechanism 2 for secondary speed reduction, the power is output through the differential assembly 4 after speed reduction, a driving wheel in the cylindrical gear pair mechanism 2 and the planet pinion mechanism 1 are coaxially fixed, compared with the two-stage speed reducer in the prior art, a supporting shaft is reduced, the transmission error and the noise of gear operation can be effectively reduced, under the condition of the same gear processing precision, the NVH performance of the speed reducer assembly is improved, the structure of the supporting shaft is more compact, the arrangement space required by the transmission part of the speed reducer is small, the space occupancy rate is low, and the overall dimension of the speed reducer assembly can be synchronously reduced, the light weight of the reducer assembly and the space arrangement on the whole vehicle are facilitated.
The planetary gear pair mechanism 1 comprises a power input shaft 11 connected with the output end of the motor, a sun gear 12 coaxially fixed with the power input shaft 11, a planet gear 13 engaged on the periphery of the sun gear 12, a planet carrier 14 assembled with the planet gear 13 and an inner gear ring 15 engaged with the planet gear 13 and fixed on the speed reducer shell 3, and a driving wheel in the cylindrical gear pair mechanism 2 is coaxially fixed on a support shaft of the planet carrier 14. As shown in the figure, the output end of the motor is connected with the power input shaft 1, power is transmitted from the motor, the power input shaft 1, the sun gear 12, the planet gear 13, the planet carrier 14 to the cylindrical gear pair mechanism 2 in sequence, a driving wheel in the cylindrical gear pair mechanism 2 is coaxially fixed on a supporting shaft of the planet carrier 14, the sun gear 12, the power input shaft 11 and the driving wheel in the cylindrical gear pair mechanism 2 are coaxially aligned, power from primary speed reduction to secondary speed reduction is transmitted in a coaxial structure, compared with the prior art, a supporting shaft of a primary driven gear in the primary speed reduction transmission is reduced, the structure is more compact, the arrangement space required by a speed reducer transmission part is small, the space occupancy rate is low, the overall dimension of the speed reducer assembly can be synchronously reduced, and the light weight of the speed reducer assembly and the space arrangement on the whole vehicle are facilitated.
The power input shaft 11 is supported in the gear housing 3 by a bearing 16, and the support shaft of the carrier 14 is supported in the gear housing 3 by two bearings 16. One end of the power input shaft 11 is connected with the output end of the motor, the middle of the power input shaft is supported by the bearing 16, the other end of the power input shaft is coaxially pressed on the sun gear 12, the power input shaft 11 rotates stably and smoothly to ensure the effective transmission of power, the supporting shaft of the planet carrier 14 is supported in the reducer casing 3 through the two bearings 16, namely, the planet carrier 14 is effectively supported, the stable and smooth operation of the planet carrier 14 is ensured, and the effective transmission of power is ensured.
The cylindrical gear pair mechanism 2 comprises a driving wheel 21 coaxially fixed on a supporting shaft of the planet carrier 14 and a driven wheel 22 meshed with the driving wheel 21, and the driven wheel 22 is connected with the differential assembly 4. The planet carrier 14 drives the driving wheel 21 to rotate, so that the driven wheel 22 synchronously rotates, and the driven wheel 22 drives the differential assembly 4 to rotate to realize power output.
The differential assembly 4 includes a double-ended bevel gear 41 coaxially fixed to the driven wheel 22, an output bevel gear 42 engaged with the double-ended bevel gear 41, and a power output shaft 43 coaxially fixed to the output bevel gear 42. The driven wheel 22 drives the double-ended bevel gear 41 to rotate, the output bevel gear 42 rotates synchronously with the double-ended bevel gear 41, the power output shaft 43 rotates, and power output is achieved.
The double-ended bevel gear 41, the output bevel gear 42 and the power output shaft 43 are all mounted on a mounting rack 44, the mounting rack 44 is mounted on the reducer casing 3, and the power output shaft 43 extends out of the reducer casing 3. The double-end bevel gear 41, the output bevel gear 42 and the power output shaft 43 are installed and positioned through the mounting frame 44, and the rotating stability and reliability are guaranteed.
The utility model protects a pure electric passenger car, which comprises a two-stage speed reducer and is characterized in that: the two-stage speed reducer is the two-stage speed reducer for the pure electric passenger car. The NVH performance of the speed reducer assembly in the pure electric passenger vehicle is better, the weight is lighter, the structure is more compact, the space utilization rate of the whole vehicle is higher, and the structure is more compact.
The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Claims (7)
1. Pure electric passenger car is with two-stage reduction gear, its characterized in that: the planetary pinion mechanism and the cylindrical gear pair mechanism are respectively arranged in a speed reducer shell, and the cylindrical gear pair mechanism is connected with a differential mechanism assembly.
2. The two-stage speed reducer for a pure electric passenger vehicle according to claim 1, characterized in that: the planetary auxiliary gear mechanism comprises a power input shaft connected with the output end of the motor, a sun gear coaxially fixed with the power input shaft, a planet gear meshed with the periphery of the sun gear, a planet carrier assembled with the planet gear and an inner gear ring meshed with the planet gear and fixed on the shell of the speed reducer, and a driving wheel in the cylindrical gear auxiliary mechanism is coaxially fixed on a supporting shaft of the planet carrier.
3. The two-stage speed reducer for a pure electric passenger vehicle according to claim 2, characterized in that: the power input shaft is supported in the reducer shell through a bearing, and the support shaft of the planet carrier is supported in the reducer shell through two bearings.
4. The two-stage speed reducer for a pure electric passenger vehicle according to claim 2, characterized in that: the cylindrical gear pair mechanism comprises a driving wheel coaxially fixed on a supporting shaft of the planet carrier and a driven wheel meshed with the driving wheel, and the driven wheel is connected with the differential assembly.
5. The two-stage speed reducer for a pure electric passenger vehicle according to claim 4, characterized in that: the differential assembly comprises a double-end bevel gear coaxially fixed with the driven wheel, an output bevel gear meshed with the double-end bevel gear and a power output shaft coaxially fixed with the output bevel gear.
6. The two-stage speed reducer for a pure electric passenger vehicle according to claim 5, characterized in that: the double-end bevel gear, the output bevel gear and the power output shaft are all arranged on the mounting frame, the mounting frame is arranged on the reducer shell, and the power output shaft extends out of the reducer shell.
7. Pure electric passenger car includes two-stage reduction gear, its characterized in that: the two-stage speed reducer is the two-stage speed reducer for the pure electric passenger car according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121860415.8U CN215596334U (en) | 2021-08-10 | 2021-08-10 | Two-stage speed reducer for pure electric passenger vehicle and pure electric passenger vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121860415.8U CN215596334U (en) | 2021-08-10 | 2021-08-10 | Two-stage speed reducer for pure electric passenger vehicle and pure electric passenger vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215596334U true CN215596334U (en) | 2022-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121860415.8U Active CN215596334U (en) | 2021-08-10 | 2021-08-10 | Two-stage speed reducer for pure electric passenger vehicle and pure electric passenger vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215596334U (en) |
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2021
- 2021-08-10 CN CN202121860415.8U patent/CN215596334U/en active Active
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