CN-224214652-U - Power assembly system of pure electric vehicle

Abstract

The utility model discloses a power assembly system of a pure electric vehicle, which comprises a first motor, a second motor, and a differential mechanism for receiving power of the first motor and the second motor, wherein motor shafts of the first motor and the second motor are parallel and are arranged in the same direction, two sides of the differential mechanism are provided with half shafts which are coaxially arranged, a transmission gear is arranged on a shell of the differential mechanism and is respectively in power coupling with motor shafts of the first motor and the second motor through the same transmission component, the transmission component is a planetary gear train and at least comprises a sun gear for receiving power and a driving gear for outputting power, the sun gear is fixed on the motor shafts of the first motor/the second motor, and the driving gear is meshed with the transmission gear. The utility model mainly comprises that a solid input shaft is adopted to bear larger torque, reduce deflection, avoid the input shaft fracture caused by the overlarge torque born by the input shaft, prolong the service life and improve the safety.

Inventors

• MA XIAO
• CHEN YUAN

Assignees

• 苏州辕驰科技有限公司

Dates

Publication Date

20260508

Application Date

20250124

Priority Date

20240514

Claims (6)

1. 1. The power assembly system of the electric vehicle is characterized by comprising a first motor (1), a second motor (2) and a differential mechanism (3) for receiving power of the first motor (1) and the second motor (2), wherein motor shafts of the first motor (1) and the second motor (2) are parallel and are arranged in the same direction, half shafts (6) which are coaxially arranged are arranged on two sides of the differential mechanism (3), a transmission gear (4) is arranged on a shell of the differential mechanism (3), the transmission gear (4) is respectively in power coupling with motor shafts of the first motor (1) and the second motor (2) through the same transmission component (5), the transmission component (5) is a planetary gear train and at least comprises a sun gear (51) for receiving power and a driving gear (55) for outputting power, and the sun gear (51) is fixed on the motor shafts of the first motor (1)/the second motor (2), and the driving gear (55) is meshed with the transmission gear (4).
2. 2. The electric vehicle powertrain system according to claim 1, wherein the transmission assembly (5) further includes a carrier (54) and a planetary gear (53) pivotally disposed thereon, the sun gear (51) engaged with the planetary gear (53) is disposed on an inner side of the planetary gear (53), a ring gear (52) engaged with the planetary gear is disposed on an outer side of the planetary gear (53), the ring gear (52) is fixedly disposed on the transmission, and the driving gear (55) is fixedly disposed on the other side of the carrier (54) opposite to the planetary gear (53), and the driving gear (55) and the sun gear (51) are coaxially disposed.
3. 3. The power assembly system of the pure electric vehicle according to claim 1, wherein the transmission component (5) further comprises a planet carrier (54) fixedly arranged on a transmission, a planet wheel (53) is pivotally arranged on the planet carrier (54), the sun gear (51) meshed with the planet wheel (53) is arranged on the inner side of the planet wheel (53), a gear ring (52) meshed with the planet wheel (53) is arranged on the outer side of the planet wheel (53), the driving gear (55) is fixedly arranged on the other side of the gear ring (52) opposite to the planet wheel (53), and the driving gear (55) and the sun gear (51) are coaxially arranged.
4. 4. A pure electric vehicle powertrain system according to any one of claims 1-3, characterized in that the first electric machine (1) and the second electric machine (2) are proximate and symmetrically arranged, the half shaft (6) passing between them.
5. 5. The electric vehicle powertrain system of claim 4, wherein the first motor (1) and the second motor (2) are electrically connected to a battery.
6. 6. The power assembly system of the pure electric vehicle of claim 5, wherein a hub (61) is fixedly arranged on the half shaft (6).

Description

Power assembly system of pure electric vehicle Technical Field The utility model relates to the technical field of gear shifting of a transmission, in particular to a power assembly system of a pure electric vehicle. Background The pure electric automobile has become the development direction of clean and high-efficiency automobiles, is one of the best ways for solving the problems of environmental protection and energy conservation, and is a necessary choice for sustainable development of automobile industry in China. What power configuration is adopted by the pure electric vehicle as a power driving device becomes a hot spot of technical research of the power system of the current pure electric vehicle. The arrangement number, the mode and the control strategy of the motors are different, and various structural types are formed. The patent number 202310219136.0 discloses an integrated electric drive axle assembly, which comprises a first drive motor and a second drive motor, wherein the first drive motor is connected with a first input shaft driving gear through a first input shaft, the first input shaft driving gear is meshed with a large gear ring, the large gear ring is connected with a third sliding sleeve, a second hollow shaft gear is sleeved above the large gear ring, the second hollow shaft gear is meshed with a second driven gear, the second driven gear is arranged at one end of a middle shaft, the other end of the second driven gear is connected with a third driven gear, the third driven gear is meshed with a differential gear, the differential gear is fixedly connected with the differential gear, the differential gear is connected with wheels through two side half shafts, the second drive motor is connected with a second input shaft driving gear through a second input shaft, the second input shaft is coaxially arranged with a power take-off output shaft, the end part of the power take-off output shaft is connected with a flange plate, the second input shaft driving gear is meshed with one side of an idler gear, the other side of the idler gear is meshed with a sun gear, the sun gear is meshed with the planet gear, the planet gear is meshed with the large gear, the planet gear is arranged at one end of the planet carrier, the other end of the planet carrier is connected with the first sliding sleeve, the first sliding sleeve is contacted with a shell gear and the first sliding sleeve can be separated from the shell gear. However, the hollow spindle structure of the assembly is sleeved on the half shaft of the drive axle, which can cause the hollow spindle structure to be broken. In addition, the transmission system has the advantages of complex structure, large occupied space, inconvenient carrying and larger limitation. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provides a power assembly system of a pure electric vehicle. The aim of the utility model is achieved by the following technical scheme: The utility model provides a pure electric vehicle power assembly system, includes first motor, second motor and receives the differential mechanism of first motor, second motor power, the motor shaft of first motor and second motor is parallel, and the syntropy output sets up, the both sides of differential mechanism are equipped with the semi-axis that the coaxial set up, be equipped with drive gear on the shell of differential mechanism, drive gear pass through the same drive assembly respectively with the motor shaft of first motor and second motor carries out power coupling, drive assembly is planetary gear train, and it includes at least the sun gear of receiving power and the drive gear of output power, the sun gear is fixed on the motor shaft of first motor/second motor, drive gear with drive gear meshing. Preferably, the transmission assembly further comprises a planet carrier and a planet wheel arranged on the planet carrier in a pivot mode, the sun wheel meshed with the planet carrier is arranged on the inner side of the planet wheel, the gear ring meshed with the sun wheel is arranged on the outer side of the planet wheel, the gear ring is fixedly arranged on the transmission, the driving gear is fixedly arranged on the other side, opposite to the planet wheel, of the planet carrier, and the driving gear and the sun wheel are coaxially arranged. Preferably, the transmission assembly further comprises a planet carrier fixedly arranged on the transmission, a planet wheel is pivoted on the planet carrier, the inner side of the planet wheel is provided with a sun wheel meshed with the planet wheel, the outer side of the planet wheel is provided with a gear ring meshed with the planet wheel, the driving gear is fixedly arranged on the other side of the gear ring opposite to the planet wheel, and the driving gear and the sun wheel are coaxially arranged. Preferably, the first motor and the second motor are close to each other and are symmetrica