CN217259538U - Variable-speed transmission system of electric automobile - Google Patents
Variable-speed transmission system of electric automobile Download PDFInfo
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- CN217259538U CN217259538U CN202221023553.5U CN202221023553U CN217259538U CN 217259538 U CN217259538 U CN 217259538U CN 202221023553 U CN202221023553 U CN 202221023553U CN 217259538 U CN217259538 U CN 217259538U
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- differential
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- speed reducer
- planet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model relates to an electric automobile variable speed transmission system, including driving motor, characterized by: a motor shaft of the driving motor is of a hollow structure, and the end part of the motor shaft is connected with a sun gear of a speed reducer in a matching way; a plurality of planet gears mounted on the planet carrier are respectively engaged with the sun gear, and the plurality of planet gears are engaged with an inner gear ring fixed on the speed reducer; still including connecting the differential mechanism at planet carrier right side middle part, planet carrier and differential mechanism are connected and are a whole to realize the speed reduction of reduction gear and increase turns round function and differential function. The utility model discloses compact structure, transmission safe and reliable can solve the big problem of reduction gear input and output biasing and planet row combination occupation space, satisfies the differential functional requirement of reduction gear.
Description
Technical Field
The utility model relates to an electric automobile actuating system, concretely relates to electric automobile variable speed transmission system, especially an electric automobile coaxial-type planet row reduction gear system.
Background
At present, the pure electric vehicle speed reducer is mostly a two-stage parallel shaft helical gear transmission speed reducer, and the input and the output of the speed reducer are in an offset non-concentric structure. The transmission of two-stage parallel shafts in the speed reducer occupies large space, and the size of the speed reducer box body is large, and the structure is not compact. It is generally desirable to reduce the center-to-center distance between the two parallel axes to reduce the distance of the input-output offset. In the conventional two-stage parallel shaft helical gear transmission speed reducer system (see fig. 1), a driving motor 10 is connected with a first-stage gear pinion 20, the first-stage gear pinion 20 is meshed with an intermediate shaft gear bull gear 30, an intermediate shaft second-stage pinion 40 is meshed with a main reduction gear 50 for transmission, the main reduction gear 50 is connected with an original differential 60, and two ends of the original differential 60 are respectively connected with a left wheel 80 and a right wheel 80 through transmission shafts 70. The defects of large occupied space, large size of the reducer box body and non-compact structure exist, and therefore improvement is urgently needed.
CN202301784U discloses a "planetary gear speed-change transmission device for electric vehicles", which solves the problem of low versatility and speed-change stability of the planetary gear speed-change transmission device for the existing electric vehicles. The planetary gear speed-changing transmission device of the electric automobile is arranged between a motor and a differential mechanism and comprises a shell, an input shaft, an output shaft, a sun gear connected to the input shaft and a planet carrier capable of being connected with the output shaft, wherein the planet carrier is connected with a plurality of planet gears, the sun gear is meshed with the planet gears, the speed-changing transmission device also comprises a gear ring arranged on the shell and capable of rotating relative to the shell, the gear ring is meshed with the planet gears, the planet carrier is connected with the input shaft through a clutch, and a braking mechanism capable of enabling the gear ring to be static relative to the shell is arranged on the outer side of the gear ring. The planetary gear variable speed transmission device of the electric automobile realizes two-gear switching of the electric automobile through the planetary gear train, and improves the running performance of the electric automobile. Needless to say, the solution disclosed in this patent document is no longer a useful attempt in the field of the technology.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric automobile variable speed transmission system, its compact structure, transmission safe and reliable can solve the big problem of reduction gear input and output biasing and planet row combination occupation space, satisfies the differential functional requirement of reduction gear.
An electric automobile variable speed transmission system, including driving motor, characterized by: a motor shaft of the driving motor is of a hollow structure, and the end part of the motor shaft is connected with a sun gear of a speed reducer in a matching way; a plurality of planet gears mounted on the planet carrier are respectively engaged with the sun gear, and the plurality of planet gears are engaged with an inner gear ring fixed on the speed reducer; the planetary carrier and the differential are connected into a whole to realize the functions of speed reduction and torque increase and the differential function of the speed reducer.
Furthermore, the right end of the differential is connected with one end of the right half shaft in a matching way, and the other end of the right half shaft is connected with a wheel hub in a matching way; the left end of the differential is connected with one end of a left half shaft in a matched mode, and the other end of the left half shaft penetrates through a motor shaft of the driving motor and is connected with the other wheel hub in a matched mode.
The utility model has the advantages that:
the planet carrier and the differential are designed into an integrated structure, so that the speed reduction and torque increase functions and the differential function of the speed reducer are realized, the structure is compact, and the occupied space is small;
because of adopting the planetary transmission form, the installation center distance is reduced, the installation space is saved compared with the traditional parallel shaft transmission, meanwhile, the planetary transmission can give full play to the performance of the motor, and the transmission power density is higher.
Drawings
FIG. 1 is a schematic diagram of a two-stage parallel shaft helical gear transmission reducer;
fig. 2 is a schematic structural diagram of the present invention.
In the figure (technical signature):
10-motor, 20-first-stage gear pinion, 30-intermediate gear bull gear, 40-intermediate shaft secondary pinion, 50-main reducing gear, 60-original differential, 70-transmission shaft, 80-left and right wheels.
1-driving motor, 2-sun gear, 3-inner gear ring, 4-planetary gear, 5-planet carrier, 6-differential mechanism, 7-right half shaft, 8-left half shaft, 9-wheel hub.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 2, the variable speed transmission system of the electric vehicle includes a driving motor 1, and is characterized in that: a motor shaft of the driving motor 1 is of a hollow structure, and the end part of the motor shaft is connected with a sun gear 2 of a speed reducer in a matching way; a plurality of planetary gears 4 mounted on a carrier 5 are respectively engaged with the sun gear 2, and the plurality of planetary gears 4 are engaged with an inner gear ring 3 fixed on a speed reducer; the differential mechanism 6 is connected to the middle of the right side of the planet carrier 5, and the planet carrier and the differential mechanism are connected into a whole to realize the functions of speed reduction and torque increase of the speed reducer and the differential function; compared with the traditional parallel shaft transmission, the planetary transmission reduces the installation center distance and saves the installation space.
The right end of the differential mechanism 6 is connected with one end of the right half shaft 7 in a matching way, and the other end of the right half shaft 7 is connected with a wheel hub 9 in a matching way; the left end of the differential mechanism 6 is connected with one end of a left half shaft 8 in a matching way, and the other end of the left half shaft 8 penetrates through a motor shaft of the driving motor 1 and is connected with another hub 9 in a matching way. The differential mechanism drives the left half shaft and the right half shaft to rotate simultaneously, and drives the wheel hub to rotate, so that power output is realized.
The driving motor 1 runs to drive the sun gear 2 to rotate, the sun gear 2 drives the plurality of planet gears 4 to rotate in a meshed mode, the plurality of planet gears 4 are meshed with the fixed inner gear ring 3, the planet gears 4 revolve around the sun gear 2 while rotating, and the planet carrier 5 is driven to rotate by revolution of the planet gears 4. The planet carrier 5 and the differential mechanism shell are of an integrated structure, and the differential mechanism rotates equivalently to realize the differential function of coaxial planet row transmission.
Claims (2)
1. The utility model provides an electric automobile variable speed transmission system, includes driving motor (1), characterized by: a motor shaft of the driving motor (1) is of a hollow structure, and the end part of the motor shaft is connected with a sun gear (2) of a speed reducer in a matching way; a plurality of planet gears (4) arranged on a planet carrier (5) are respectively meshed with a sun gear (2), and the plurality of planet gears (4) are meshed with an inner gear ring (3) fixed on a speed reducer; the planetary gear set further comprises a differential mechanism (6) connected to the middle portion of the right side of the planetary carrier (5), and the planetary carrier and the differential mechanism are connected into a whole to achieve the functions of speed reduction and torque increase of the speed reducer and the differential function.
2. The variable speed drive system of an electric vehicle of claim 1, wherein: the right end of the differential (6) is connected with one end of a right half shaft (7) in a matching way, and the other end of the right half shaft (7) is connected with a wheel hub (9) in a matching way; the left end of the differential mechanism (6) is connected with one end of a left half shaft (8) in a matched mode, and the other end of the left half shaft (8) penetrates through a motor shaft of the driving motor (1) and is connected with another hub (9) in a matched mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221023553.5U CN217259538U (en) | 2022-04-29 | 2022-04-29 | Variable-speed transmission system of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221023553.5U CN217259538U (en) | 2022-04-29 | 2022-04-29 | Variable-speed transmission system of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217259538U true CN217259538U (en) | 2022-08-23 |
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ID=82879766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221023553.5U Active CN217259538U (en) | 2022-04-29 | 2022-04-29 | Variable-speed transmission system of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217259538U (en) |
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2022
- 2022-04-29 CN CN202221023553.5U patent/CN217259538U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: Deep Blue Automotive Technology Co.,Ltd. Address before: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |