CN-117341462-B - Electric drive bridge assembly and have vehicle with electric drive axle assembly

CN117341462BCN 117341462 BCN117341462 BCN 117341462BCN-117341462-B

Abstract

The invention discloses an electric drive axle assembly and a vehicle with the same, comprising a clutch, a gear ring, a planet wheel, a first gear shifting element, a second driving gear and a third driving gear; the gear ring can be combined with or disconnected from the clutch, the gear ring is meshed with the planet gears, the first gear shifting element can be combined with or disconnected from the second driving gear, the first gear shifting element can be combined with or disconnected from the third driving gear, the clutch and the gear ring are combined to form a first gear when the gear is shifted, the first gear shifting element is combined with the second driving gear to form a second gear, and the first gear shifting element is combined with the third driving gear to form a third gear. The invention has compact structure, less parts, light weight and small volume, can meet the space requirement of the chassis of plate spring and air suspension arrangement, properly increases the number of speed ratios, fully plays the role of the efficiency of the driving motor, improves the transmission efficiency of each speed ratio, improves the efficiency of the electric drive bridge system, effectively reduces the energy consumption, prolongs the driving mileage and saves the transportation cost for users.

Inventors

WANG PENGPENG
Ma Xuyao
LIU YI
ZHANG FAYONG
LUO WENPING
ZHANG HAITAO
LIANG HAO
WEI FUCHAO

Assignees

陕西法士特齿轮有限责任公司

Dates

Publication Date: 20260512
Application Date: 20230925

Claims (5)

1. An electric drive axle assembly is characterized by comprising a power input unit and a power output unit; The first gear control assembly comprises a clutch (17), a gear ring (16) and a planetary gear (18), wherein the gear ring (16) can be connected with or disconnected from the clutch (17), the gear ring (16) is meshed with the planetary gear (18), and the planetary gear (18) is connected with the power input unit and the power output unit; A second gear control assembly comprising a first gear shift element (9) and a second driving gear (10), the first gear shift element (9) being combinable with or disconnectable from the second driving gear (10), the first gear shift element (9) being connected with a power input unit, the second driving gear (10) being connected with a power output unit; The third gear control assembly comprises a third driving gear (3), wherein the first gear shifting element (9) can be combined with or disconnected from the third driving gear (3), and the third driving gear (3) is connected with the power output unit; When the gear is changed, the clutch (17) is combined with the gear ring (16) to realize first gear switching, when the first gear shifting element (9) is combined with the second driving gear (10), the second gear switching is realized, and when the first gear shifting element (9) is combined with the third driving gear (3), the third gear switching is realized; the power input unit comprises an input shaft (2), wherein a driving motor (1) and an input shaft driving gear (4) are fixedly connected to two ends of the input shaft (2), an intermediate shaft driven gear (5) is meshed on the input shaft driving gear (4), the intermediate shaft driven gear (5) is fixedly arranged on an intermediate shaft (6), a first driving gear (7) is fixedly arranged on the intermediate shaft (6), a first driven gear (8) is meshed on the first driving gear (7), the first driven gear (8) is connected with a sun gear (19), the sun gear (19) is meshed with a planet gear (18), a first gear shifting element (9) is fixedly arranged on the intermediate shaft (6), and the second driving gear (10) and a third driving gear (3) are all sleeved on the intermediate shaft (6) in a hollow mode; The power output unit comprises a first half shaft (141) and a second half shaft (142), wherein one end of the first half shaft (141) and one end of the second half shaft (142) are connected with wheels (13), and the other end of the first half shaft and the other end of the second half shaft are fixedly connected with a differential mechanism (12), and the planet wheel (18), the second driving gear (10) and the third driving gear (3) are connected with the differential mechanism (12); The electric drive axle assembly further comprises a second driven gear (11), wherein the second driven gear (11) is fixedly connected with the differential mechanism (12), the second driving gear (10) is meshed with the second driven gear (11), and the second driving gear (10) is connected with the differential mechanism (12) through the second driven gear (11); The electric drive axle assembly further comprises a third driven gear (15), wherein the third driven gear (15) is fixedly connected with the differential mechanism (12), the third driving gear (3) is meshed with the third driven gear (15), and the third driving gear (3) is connected with the differential mechanism (12) through the third driven gear (15); The electric drive axle assembly further comprises a planet carrier, and the planet wheels (18) are connected with a third driven gear (15) through the planet carrier.
2. An electric drive axle assembly according to claim 1, characterized in that the first driving gear (7) is meshed with a planet row big gear ring (20), the planet row big gear ring (20) is meshed with a planet wheel (18) and a sun gear (19) in sequence, the sun gear (19) is meshed with a second gear shifting element (21), and the second gear shifting element (21) can be combined with or disconnected from the transmission housing (100).
3. An electrically driven axle assembly according to claim 2, wherein the first (9) and second (21) shift elements are any one of a sliding sleeve, a synchronizer and a clutch.
4. An electrically driven bridge assembly according to claim 1, comprising two sets of said power input units symmetrically arranged.
5. A vehicle having an electric drive axle assembly as defined in any one of claims 1 to 4.

Description

Electric drive bridge assembly and have vehicle with electric drive axle assembly Technical Field The invention belongs to the technical field of electric drive bridge assemblies, and relates to an electric drive bridge assembly and a vehicle with the same. Background With the continuous development of new energy driving technology, the electric drive bridge with high integration level is gradually applied to commercial vehicles. The development difficulty of the electric drive bridge system is that a reduction mechanism with as many gears as possible is arranged in the limited space of the bridge shell, and meanwhile, the requirements of light weight, climbing and high-speed running are simultaneously considered. At present, the high-speed standard load collected road load spectrum data of the tractor takes two gears as an example, the first gear speed ratio (maximum speed ratio) is mainly used for working conditions such as full load climbing a large slope, starting, traffic jam creeping and the like, and the data occupy less than 1/10 of the whole effective running time, and the highest gear is mainly used in other cases. The electric drive axle with the wheel-side speed reducer is provided by a patent CN214492504U, driving motor power is connected to a two-gear shifting module on an axle through a transmission module, power is distributed to two half shafts through a differential mechanism through planetary speed reduction and finally transmitted to wheels through the wheel-side speed reducer, a motor output shaft in the two-gear electric drive axle system provided by the patent CN217574828U is directly connected with a planetary gear reduction mechanism, after gear shifting, wheels on two sides are respectively connected with a second planetary gear and a third planetary gear, and the bridge assembly provided by the patent CN218805002U comprises a gear train, a transmission shaft, a balance shaft and the differential mechanism which are sequentially coupled, and the whole transmission comprises six parallel shafts. When the electric drive axle structure is applied to a heavy truck type, the defects of large cargo carrying capacity of the heavy truck and high torque demand exist, and although the speed ratio can be integrally increased by using planetary gear reduction, power of each gear needs to pass through the planetary gear when the electric drive axle structure is used, and the transmission efficiency is low. The parallel shaft transmission efficiency is high, but the transmission stage number is too many, so that the envelope size of the electric drive bridge is increased, the whole vehicle is difficult to arrange, and the overall transmission efficiency is reduced. At present, an electric drive bridge mostly uses two gears (two different speed ratios), the speed ratio is less, the improvement of the economy of the whole vehicle is not facilitated, and the power consumption is high, because the electric drive bridge has the advantages that 1, if the speed ratio range is large, the large climbing capacity and the high-speed running capacity are both considered, the step difference of the two speed ratios is too large, and the motor still cannot run in a high-efficiency area under the complex working condition. 2. If the speed ratio range is small and the large speed ratio meets the climbing capacity, the small speed ratio is higher, the motor rotates at high speed when the vehicle runs at high speed, the requirements on the gearbox bearings and sealing are strict, and if the small speed ratio is adjusted to a proper value, the large speed ratio cannot meet the higher torque requirement of the wheel end. Disclosure of Invention Aiming at the problems in the prior art, the invention provides an electric drive bridge assembly and a vehicle with the same, thereby solving the technical problems of poor overall vehicle economy and high power consumption caused by less electric drive bridge speed ratio in the prior art. The invention is realized by the following technical scheme: An electric drive axle assembly comprises a power input unit and a power output unit; The first gear control assembly comprises a clutch, a gear ring and a planetary gear, wherein the gear ring can be connected with or disconnected from the clutch, the gear ring is meshed with the planetary gear, and the planetary gear is connected with the power input unit and the power output unit; The second gear control assembly comprises a first gear shifting element and a second driving gear, the first gear shifting element can be combined with or disconnected from the second driving gear, the first gear shifting element is connected with the power input unit, and the second driving gear is connected with the power output unit; The first gear shifting element can be combined with or disconnected from the first driving gear, and the first driving gear is connected with the power output unit; When the gear is changed, the clutch and the gear