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CN-122008834-A - Range-extending pure electric driving mechanism and electric drive bridge assembly

CN122008834ACN 122008834 ACN122008834 ACN 122008834ACN-122008834-A

Abstract

The application relates to a range-extending pure electric driving mechanism and an electric drive axle assembly, wherein the range-extending pure electric driving mechanism comprises a driving motor and an output gear, the driving motor is an electric power generation integrated machine, a motor shaft of the driving motor is coaxially and fixedly connected with a driving shaft, the driving shaft is connected with the output gear and an engine output shaft through a transmission structure, and the transmission structure can selectively transmit power output by the engine to the driving shaft or transmit power output by the driving motor to the output gear. The driving mechanism can be used as a driving mechanism in a front drive axle of an electric driving system of the whole vehicle, and only one motor is needed to realize the driving and power generation functions, so that the weight of the whole vehicle is reduced, the space of a front cabin is increased, and the BOM cost of the whole vehicle is reduced.

Inventors

  • YANG SHIQING
  • LI BIN
  • ZHU GUOHAO
  • TANG TINGYU
  • WANG XIANGLIN
  • CAO LINFENG
  • ZHAO JUN

Assignees

  • 博格华纳汽车零部件（武汉）有限公司

Dates

Publication Date
20260512
Application Date
20260130

Claims (12)

  1. 1. The extended-range pure electric driving mechanism is characterized by comprising a driving motor (11) and an output gear (12), wherein the driving motor (11) is an electric power generation integrated machine, and a motor shaft of the driving motor (11) is coaxially and fixedly connected with a driving shaft (14); the driving shaft (14) is connected with the output gear (12) and the output shaft of the engine (13) through a transmission structure, and the transmission structure can selectively transmit the power output by the engine (13) to the driving shaft (14) or transmit the power output by the driving motor (11) to the output gear (12).
  2. 2. The extended range full electric drive mechanism as set forth in claim 1, wherein the transmission structure further disconnects power transmission between the drive shaft (14) and the output gear (12) and the engine (13).
  3. 3. The extended range full electric drive mechanism according to claim 2, characterized in that the transmission structure comprises an input gear (15) and a clutch device (16), the input gear (15) and the output gear (12) are coaxial with the drive shaft (14) and rotatable relative to the drive shaft (14), and the engine (13) outputs power to the input gear (15); The clutch device (16) is arranged on the driving shaft (14), and the clutch device (16) is selectively engaged with at most one of the input gear (15) and the output gear (12) and transmits power between the driving shaft (14) and the engaged gear when engaged.
  4. 4. The extended-range full electric drive mechanism according to claim 3, wherein the input gear (15) and the output gear (12) are axially spaced apart along the drive shaft (14), and the clutch device (16) is disposed between the input gear (15) and the output gear (12).
  5. 5. The extended-range full electric drive mechanism according to claim 3, wherein the input gear (15) and the output gear (12) are coaxially sleeved outside the drive shaft (14).
  6. 6. The extended-range full electric drive mechanism as set forth in claim 3, wherein power is transmitted between the input gear (15) and the output shaft of the engine (13) through a power generation transmission gear (17), the power generation transmission gear (17) is coaxially fixed with the output shaft of the engine (13), and the power generation transmission gear (17) is meshed with the input gear (15).
  7. 7. The extended-range full electric drive mechanism as set forth in claim 3, wherein the clutch device (16) comprises a slide engagement sleeve (161), the slide engagement sleeve (161) is coaxially disposed with the drive shaft (14) and is restricted from rotating relatively, the slide engagement sleeve (161) is axially slidable along the drive shaft (14), the input gear (15) and the output gear (12) are respectively fixedly connected with a coaxially disposed fixed engagement sleeve (162), the slide engagement sleeve (161) is axially slidable along the drive shaft (14) to engage with either one of the fixed engagement sleeves (162) or to disengage from both of the fixed engagement sleeves (162), and the slide engagement sleeve (161) is restricted from rotating relatively when engaged with either one of the fixed engagement sleeves (162).
  8. 8. The extended-range full electric drive mechanism according to claim 3, wherein the clutch device (16) is an electromagnetic clutch.
  9. 9. The extended range full electric drive mechanism as set forth in claim 1, wherein the drive motor (11) and the engine (13) are distributed in the axial direction of the drive shaft (14) and are located at both ends of the drive shaft (14), respectively.
  10. 10. An electric drive axle assembly characterized by comprising the extended-range pure electric drive mechanism as claimed in any one of claims 1 to 9.
  11. 11. The electric drive axle assembly of claim 10, wherein the output gear (12) is connected with the differential (3) through a reduction mechanism (2), and the reduction mechanism (2) transmits the output power of the driving motor (11) to the differential (3).
  12. 12. An electric drive axle assembly according to claim 10, characterized in that the reduction gear (2) comprises a first reduction gear (21) and a second reduction gear (22) fixed coaxially, the housing (31) of the differential (3) is fixed with a drive transmission gear (32) coaxial with the half shaft (4), the first reduction gear (21) being larger in diameter than the output gear (12) and larger in diameter than the second reduction gear (22), the drive transmission gear (32) being larger in diameter than the second reduction gear (22), the first reduction gear (21) being in mesh with the output gear (12), the second reduction gear (22) being in mesh with the drive transmission gear (32).

Description

Range-extending pure electric driving mechanism and electric drive bridge assembly Technical Field The invention relates to the technical field of electric drive bridge assemblies, in particular to a range-extending pure electric drive mechanism and an electric drive bridge assembly. Background If a vehicle with a range extending function wants to realize a four-wheel drive mode, the whole vehicle usually needs three motors, a front axle one power generation motor and one driving motor, and a rear axle one driving motor, and the weight and the cost of the whole vehicle are high. Disclosure of Invention Based on the expression, the invention provides a range-extending type pure electric driving mechanism and an electric drive axle assembly, so as to solve the problems that three motors are needed for the whole vehicle, and the weight and the cost of the whole vehicle are high. The technical scheme for solving the technical problems is as follows: In a first aspect, the application provides a range-extending pure electric driving mechanism, which comprises a driving motor and an output gear, wherein the driving motor is an electric power generation integrated machine, and a motor shaft of the driving motor is coaxially and fixedly connected with a driving shaft; The driving shaft is connected with the output gear and the engine output shaft through a transmission structure, and the transmission structure can selectively transmit the engine output power to the driving shaft or transmit the driving motor output power to the output gear. Preferably, the transmission structure may also disconnect the power transmission between the drive shaft and the output gear and the engine. Preferably, the transmission structure comprises an input gear and a clutch device, the input gear and the output gear are coaxial with the driving shaft and can rotate relative to the driving shaft, and the engine outputs power to the input gear; the clutch device is arranged on the driving shaft, can be selectively engaged with at most one of the input gear and the output gear, and can transmit power between the driving shaft and the engaged gear when being engaged. Preferably, the input gear and the output gear are axially and alternately distributed along the driving shaft, and the clutch device is arranged between the input gear and the output gear. Preferably, the input gear and the output gear are coaxially sleeved outside the driving shaft. Preferably, power is transmitted between the input gear and the engine output shaft through a power generation transmission gear, the power generation transmission gear is coaxially fixed with the engine output shaft, and the power generation transmission gear is meshed with the input gear. Preferably, the clutch device is an electromagnetic clutch. Preferably, the clutch device comprises a sliding engagement sleeve, the sliding engagement sleeve and the driving shaft are coaxially arranged and are limited to rotate relatively, the sliding engagement sleeve can axially slide along the driving shaft, the input gear and the output gear are respectively and fixedly connected with fixed engagement sleeves coaxially arranged, the sliding engagement sleeve can axially slide along the driving shaft to be engaged with any one of the fixed engagement sleeves, or is equally separated from the two fixed engagement sleeves, and the sliding engagement sleeve and any one of the fixed engagement sleeves are limited to rotate relatively when engaged. Preferably, the driving motor and the engine are distributed in the axial direction of the driving shaft and are respectively positioned at two ends of the driving shaft. In a second aspect, the present application provides an electric drive axle assembly comprising an extended range full electric drive mechanism as described above. Preferably, the output gear is connected with a differential mechanism through a speed reducing mechanism, and the speed reducing mechanism transmits the output power of the driving motor to the differential mechanism. Preferably, the reduction mechanism comprises a first reduction gear and a second reduction gear which are coaxially fixed, a driving transmission gear which is coaxial with the half shaft is fixed on the shell of the differential mechanism, the diameter of the first reduction gear is larger than that of the output gear and larger than that of the second reduction gear, the diameter of the driving transmission gear is larger than that of the second reduction gear, the first reduction gear is meshed with the output gear, and the second reduction gear is meshed with the driving transmission gear. Compared with the prior art, the technical scheme of the application has at least the following beneficial technical effects: 1. the driving mechanism adopts a driving motor of the electric power generation integrated machine, and the power transmission path is switched through the transmission structure. In the driving mode, the p