CN220452630U - Planetary gear type electric vehicle two-gear gearbox - Google Patents
Planetary gear type electric vehicle two-gear gearbox Download PDFInfo
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- CN220452630U CN220452630U CN202321866123.4U CN202321866123U CN220452630U CN 220452630 U CN220452630 U CN 220452630U CN 202321866123 U CN202321866123 U CN 202321866123U CN 220452630 U CN220452630 U CN 220452630U
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- 230000009467 reduction Effects 0.000 claims abstract description 60
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000006386 neutralization reaction Methods 0.000 description 1
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Abstract
The utility model provides a planetary gear type electric vehicle two-gear gearbox which consists of a group of planetary gear, a plate clutch, a plate brake, a secondary reduction gear pair, a main reduction gear pair and a differential mechanism. The planet carrier of the planet row is connected with the motor and is an input end; the gear ring of the planet row is the output end of the planet carrier. The scheme adopts a single planet row, a planet carrier for input and a gear ring for output, and utilizes two-stage planet gears to adjust the speed ratio, so that the axial direction is ensured not to be increased in size, and the whole size of the gearbox is small and is equivalent to the size of the existing fixed-speed-ratio electric drive reducer. By adopting a planetary gear type structure, the bearing capacity of the gear can be improved, and the surface pitting can be performed under the working condition of one gear with large torque. The second-gear planetary gear does not rotate inside, and the second-gear planetary gear runs as a whole, so that transmission loss is reduced, and transmission efficiency is improved. The scheme adopts the planet wheel, the plate clutch and the plate brake to shift gears, the shifting process has no power interruption, and the shifting smoothness is good. The space is better by adopting a single-row planetary gear train.
Description
Technical Field
The utility model relates to the technical field of electric vehicle transmission, in particular to a planetary gear type two-gear gearbox of an electric vehicle.
Background
For realizing the peak of carbon and the neutralization target of carbon, popularization of electric vehicles in the field of automobiles is a main measure, and the sales of electric vehicles in the future can be rapidly increased.
At present, an electric automobile in production or research is mainly an electric direct-drive scheme with a fixed speed ratio, namely, a motor directly drives wheels through a speed reduction device with the fixed speed ratio, and the transmission mode has good smoothness, but the dynamic property of the automobile is poor, and the requirement on the performance of a motor battery is high. The transmission system solution of the motor and the gearbox can improve the highest speed, acceleration performance and lowest climbing gradient of the vehicle, improve the running efficiency of the motor, reduce the power consumption and reduce the performance requirements on the motor and the battery.
The prior motor and gearbox transmission system scheme mainly comprises: 1. the scheme of a parallel shaft for shifting fork shifting is characterized in that power interruption exists in the shifting process, and the scheme is not suitable for a passenger car; 2. the clutch gear shifting scheme has low transmission efficiency and higher cost; 3. the planet row structure cooperates with a one-way clutch scheme, and the scheme has impact in the process of downshift, is poor in gear shifting comfort and is not suitable for two-wheel driving vehicle types.
In view of the above problems, the present inventors have finally achieved the present utility model through long-time studies and practices.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the planetary gear type two-gear gearbox of the electric vehicle, which not only provides good power performance for the electric vehicle and improves the transmission efficiency, but also solves the problems of power interruption and gear shifting impact.
The utility model adopts the technical scheme that:
the two-gear gearbox of the planetary-gear-type electric vehicle comprises a driving motor, a planetary gear, a clutch, a brake, a secondary reduction gear pair, a main reduction gear pair and a differential;
the planetary row comprises a planet carrier, a gear ring, a sun gear, a primary planetary gear and a secondary planetary gear; the sun gear is coaxial with the planet carrier, the primary planet gear and the secondary planet gear are respectively connected with the planet carrier in a rotating way, the sun gear is meshed with the primary planet gear, the primary planet gear is meshed with the secondary planet gear, and the secondary planet gear is meshed with the gear ring;
the output end of the driving motor is connected with the planet carrier, the gear ring is connected with the friction plate of the clutch, the planet carrier is connected with the steel plate of the clutch, the sun gear is connected with the friction plate of the brake, and the steel plate of the brake is fixedly connected with the gearbox shell;
the gear ring transmits power to the differential mechanism through the secondary reduction gear pair and the main reduction gear pair in sequence.
Further, in a first gear state, the brake is engaged, and the clutch is disengaged; the planet carrier in the planetary row, the gear ring in the planetary row, and the speed ratio is 1.8;
in the second gear state, the clutch is combined, the brake is separated, no relative motion exists in the planetary gear set, and the planetary gear set runs as a whole and has a speed ratio of 1.
Further, in reverse and braking energy recovery states, the brake is engaged and the clutch is disengaged; in the planetary row, the planet carrier inputs, the gear ring outputs and the speed ratio is 1.8.
Further, the secondary reduction gear pair comprises a secondary reduction input gear and a secondary reduction output gear, the secondary reduction input gear is fixedly connected with the gear ring, the secondary reduction input gear is meshed with the secondary reduction output gear, and the speed ratio is 1.8.
Further, the main speed reduction gear pair comprises a main speed reduction input gear and a main speed reduction output gear, and the main speed reduction input gear and the secondary speed reduction output gear are fixed on the same shaft; the main speed reduction input gear is meshed with the main speed reduction output gear, and the speed reduction ratio is 4.4.
Further, the main reduction output gear is connected with the differential.
Compared with the prior art, the utility model has the beneficial effects that:
the scheme adopts the planet wheel, the plate clutch and the plate brake to shift gears, the shifting process has no power interruption, and the shifting smoothness is good. The space is better by adopting a single-row planetary gear train.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structure of a two-speed transmission of an electric vehicle according to an embodiment of the present utility model.
Detailed Description
The above and further technical features and advantages of the present utility model are described in more detail below with reference to the accompanying drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrated; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1, the two-gear gearbox provided by the utility model is composed of a planetary gear set, a plate clutch 6, a plate brake 7, two-stage reduction gear pairs 9 and 10, main reduction gear pairs 11 and 12 and a differential mechanism 12. The planet carrier of the planet row is connected with the motor and is an input end; the gear ring of the planet row is the output end of the planet carrier.
Specifically, the planetary row includes a carrier 2, a ring gear 5, a sun gear 8, primary planet gears 3, and secondary planet gears 4. The sun gear 8 is coaxial with the planet carrier 2, the primary planet gear 3 and the secondary planet gear 4 are respectively connected with the planet carrier 2 in a rotating way, the sun gear 8 is meshed with the primary planet gear 3, the primary planet gear 3 is meshed with the secondary planet gear 4, and the secondary planet gear 4 is meshed with the gear ring 5. The output end of the driving motor 1 is connected with the planet carrier 2, the gear ring 5 is connected with the friction plate of the clutch 6, the planet carrier 2 is connected with the steel plate of the clutch 6, the sun gear 8 is connected with the friction plate of the brake 7, and the steel plate of the brake 7 is fixedly connected with the gearbox shell. The planetary gear 1 is 1.8,2, the secondary speed reduction is 1.8 and the main speed reduction is 4.4.
The secondary reduction gear pair comprises a secondary reduction input gear 9 and a secondary reduction output gear 10, the secondary reduction input gear 9 is fixedly connected with the gear ring 5, and the secondary reduction input gear 9 is meshed with the secondary reduction output gear 10. The main reduction gear pair includes a main reduction input gear 11 and a main reduction output gear 12, and the main reduction input gear 11 and the secondary reduction output gear 12 are fixed on the same shaft. The main reduction input gear 11 meshes with a main reduction output gear 12. The driving motor 1 and the planet carrier 2 of the planet row are connected by a spline. The secondary reduction input gear 9 is fixedly connected with the gear ring 5 of the planetary row in a welding way. The main reduction output gear 12 is connected to a differential 13, the differential 13 is connected to a half shaft 14 by a universal joint, and the half shaft 14 is connected to wheels 15 by a universal joint.
The specific description of each gear is as follows:
a first gear: the brake is combined, the clutch is separated, the planet carrier of the planet row is used as input, the gear ring is output, and the speed ratio is 1.8.
Second gear: the clutch is combined, the brake is separated, no relative motion exists in the planetary gear, and the speed ratio is 1.
Reverse gear and braking energy recovery: the brake is combined, the clutch is separated, the planet carrier of the planet row is used as input, the gear ring is output, and the speed ratio is 1.8.
The scheme adopts a single planet row, a planet carrier for input and a gear ring for output, utilizes two-stage planet gears for adjusting the speed ratio, ensures that the axial direction is not increased in size, has small overall size, is equivalent to the size of the existing fixed speed ratio electric drive reducer, can directly replace the fixed speed ratio reducer in a 3-in-1 driving system developed by the fixed speed ratio reducer, increases the combination form of the driving system, and realizes the flexible development of the platform. By adopting a planetary gear type structure, the bearing capacity of the gear can be improved, and the surface pitting can be performed under the working condition of one gear with large torque. The second-gear planetary gear does not rotate inside, and the second-gear planetary gear runs as a whole, so that transmission loss is reduced, and transmission efficiency is improved.
The foregoing description of the preferred embodiment of the utility model is merely illustrative of the utility model, and is not intended to be limiting. The structure, connection mode and the like of each component in the utility model can be changed, and all equivalent changes and improvements performed on the basis of the technical scheme of the utility model are not excluded from the protection scope of the utility model.
Claims (6)
1. The planetary gear type electric vehicle two-gear gearbox is characterized by comprising a planetary gear, a clutch, a brake, a secondary reduction gear pair, a main reduction gear pair and a differential;
the planetary row comprises a planet carrier, a gear ring, a sun gear, a primary planetary gear and a secondary planetary gear; the sun gear is coaxial with the planet carrier, the primary planet gear and the secondary planet gear are respectively connected with the planet carrier in a rotating way, the sun gear is meshed with the primary planet gear, the primary planet gear is meshed with the secondary planet gear, and the secondary planet gear is meshed with the gear ring;
the output end of the driving motor is connected with the planet carrier, the gear ring is connected with the friction plate of the clutch, the planet carrier is connected with the steel plate of the clutch, the sun gear is connected with the friction plate of the brake, and the steel plate of the brake is fixedly connected with the gearbox shell;
the gear ring transmits power to the differential mechanism through the secondary reduction gear pair and the main reduction gear pair in sequence.
2. A planetary gear type electric vehicle two-speed gearbox as set forth in claim 1, wherein,
in a first gear state, the brake is combined, and the clutch is separated; the planet carrier in the planetary row, the gear ring in the planetary row, and the speed ratio is 1.8;
in the second gear state, the clutch is combined, the brake is separated, no relative motion exists in the planetary gear set, and the planetary gear set runs as a whole and has a speed ratio of 1.
3. A planetary gear type electric vehicle two-speed gearbox according to claim 2, characterized in that,
in the reverse gear and braking energy recovery state, the brake is combined, and the clutch is separated; in the planetary row, the planet carrier inputs, the gear ring outputs and the speed ratio is 1.8.
4. A two-speed gearbox for a planetary electric vehicle according to claim 3, wherein the secondary reduction gear pair comprises a secondary reduction input gear and a secondary reduction output gear, the secondary reduction input gear is fixedly connected with the gear ring, and the secondary reduction input gear is meshed with the secondary reduction output gear, and the speed ratio is 1.8.
5. The two-gear gearbox of a planetary gear type electric vehicle according to claim 4, wherein the main reduction gear pair comprises a main reduction input gear and a main reduction output gear, and the main reduction input gear and the secondary reduction output gear are fixed on the same shaft; the main speed reduction input gear is meshed with the main speed reduction output gear, and the speed reduction ratio is 4.4.
6. A planetary electric vehicle two-speed gearbox in accordance with claim 5 wherein said main reduction output gear is connected to said differential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321866123.4U CN220452630U (en) | 2023-07-14 | 2023-07-14 | Planetary gear type electric vehicle two-gear gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321866123.4U CN220452630U (en) | 2023-07-14 | 2023-07-14 | Planetary gear type electric vehicle two-gear gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220452630U true CN220452630U (en) | 2024-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321866123.4U Active CN220452630U (en) | 2023-07-14 | 2023-07-14 | Planetary gear type electric vehicle two-gear gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220452630U (en) |
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2023
- 2023-07-14 CN CN202321866123.4U patent/CN220452630U/en active Active
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