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EP-4579101-B1 - LONGITUDINAL TWO-GEAR ELECTRIC DRIVE ASSEMBLY AND NEW ENERGY VEHICLE

EP4579101B1EP 4579101 B1EP4579101 B1EP 4579101B1EP-4579101-B1

Inventors

  • YU, PING
  • LI, JIANWEN
  • YANG, Changqi
  • ZHAO, Hongchao
  • LIU, Huaijin
  • XU, QIANG

Dates

Publication Date
20260513
Application Date
20240425

Claims (8)

  1. A longitudinal two-speed electric drive assembly, comprising: a drive motor (1), a power take-off mechanism and a transmission mechanism; wherein the transmission mechanism comprises an input shaft (2), an intermediate shaft (3) and an output shaft (4), the input shaft (2) is connected to the drive motor (1) for transmission, the output shaft (4) and the input shaft (2) are coaxially arranged and connected for transmission via a first clutch (5), the intermediate shaft (3) and the output shaft (4) are arranged in parallel, the input shaft (2) is fixedly provided thereon with a first gear (6), the intermediate shaft (3) is provided thereon with a second gear (7) and a third gear (8), the second gear (7) is fixedly connected to the intermediate shaft (3), the third gear (8) and the intermediate shaft (3) are connected for transmission via a second clutch (9), the output shaft (4) is provided thereon with a fourth gear (10), the first gear (6) and the second gear (7) are meshed for transmission, and the third gear (8) and the fourth gear (10) are meshed for transmission; the power take-off mechanism connected to the intermediate shaft (3) for transmission via a third clutch (18) to draw power of the drive motor (1), the power take-off mechanism comprises a power take-off input shaft (13) and a power take-off output shaft (14); the power take-off input shaft (13) and the intermediate shaft (3) are arranged coaxially and connected for transmission via the third clutch (18), the power take-off output shaft (14) and the power take-off input shaft (13) are arranged in parallel, the power take-off input shaft (13) is provided thereon with a fifth gear (15), the power take-off output shaft (14) is provided thereon with a sixth gear (16), and the fifth gear (15) and the sixth gear (16) are meshed for transmission, wherein the first clutch (5) and the second clutch (9) are both electromagnetic tooth clutches.
  2. The longitudinal two-speed electric drive assembly according to claim 1, characterized in that : the input shaft (2) and the output shaft (4) are connected via a bearing (11).
  3. The longitudinal two-speed electric drive assembly according to claim 1, characterized in that : the output shaft (4) is provided thereon with a first output flange (12).
  4. The longitudinal two-speed electric drive assembly according to claim 1, characterized in that : the first clutch (5) comprises a first fixed face gear (5-1) and a first movable face gear (5-2); the first fixed face gear (5-1) is fixedly connected to the input shaft (2), and the first movable face gear (5-2) is connected to the output shaft (4) via a spline.
  5. The longitudinal two-speed electric drive assembly according to claim 1, characterized in that : the second clutch (9) comprises a second fixed face gear (9-1) and a second movable face gear (9-2); the second fixed face gear (9-1) is fixedly connected to the third gear (8), and the second movable face gear (9-2) is connected to the intermediate shaft (3) via a spline.
  6. The longitudinal two-speed electric drive assembly according to claim 1, characterized in that : the power take-off output shaft (14) is provided thereon with a second output flange (17).
  7. The longitudinal two-speed electric drive assembly according to any one of claims 1 to 6, characterized in that : the rotor shaft of the drive motor (1) and the input shaft (2) are an integrated structure.
  8. A new energy vehicle using the longitudinal two-speed electric drive assembly according to any one of claims 1 to 7.

Description

TECHNICAL FIELD The present invention belongs to the technical field of new energy vehicles, and specifically relates to a longitudinal two-speed electric drive assembly and a new energy vehicle. BACKGROUND The drive assembly of a new energy vehicle is generally composed of a motor and a reducer. The motor first converts electrical energy into mechanical energy to provide power for the vehicle, and then reduces the motor speed by the reducer while amplifying the output torque of the motor, thereby achieving the effect of decreasing the speed and increasing the torque, so that the drive assembly can operate within a certain rotational speed range and under a certain driving torque. At present, the drive assemblies in new energy vehicles mostly use motor direct drive or two-stage reduction drive, so that the vehicle can only achieve direct drive or power output with one reduction ratio when driving on different road sections (such as flat roads and uphill), and the high-speed condition and high-torque hill-climbing condition cannot be satisfied at the same time. If a high-power motor is used to achieve high speed and high torque output, the production cost of the drive assembly will increase, and there will also be NVH (Noise, Vibration, Harshness) problems. Document CN 108 422 849 A, according to its abstract, discloses a longitudinal dual power source vehicle drive assembly comprising: an automatic transmission, a first power source and a second power source, a transmission input shaft and a transmission output shaft of the automatic transmission share the same axial line, the transmission input shaft is connected with an output shaft of the first power source, the transmission output shaft is connected with an input shaft of the second power source, an output shaft of the second power source is connected with an axle half shaft, and the automatic transmission has two speed ratio transmission types. Document CN 205 423 703 U, according to its abstract, discloses an automatic transmission including a bi -polar face tooth combination fluted disc and the dead axle train that the two -stage is slowed down. The shifter of derailleur is bi -polar face tooth combination fluted disc, has bi -polar face tooth: left end face tooth and right -hand member face tooth. Through the axial displacement on the derailleur output shaft who realizes bi -polar face tooth combination fluted disc, its left end face tooth and right -hand member face tooth respectively with the meshing of terminal surface tooth, realize second gear and one grade of gear, when it is not meshing with either, the transmission is in neutral position, the derailleur is at the neutral position. Integrative structure is independently perhaps assembled respectively become with right -hand member face tooth to left end face tooth. Document CN 114 183 506 A, according to its abstract, discloses a vehicle transmission, a vehicle power system and a vehicle. The transmission comprises a first gear, a second gear and a third gear, an input shaft and an output shaft are coaxially arranged, an intermediate shaft is parallel to the input shaft and is in transmission connection with the input shaft, and a normally-meshed driving gear is fixed on the input shaft; the first-gear driven gear is rotationally assembled on the output shaft; the first-gear and third-gear synchronizer comprises a first gear hub fixed to the output shaft and a first combination sleeve assembled on the first gear hub in a sliding mode, the first combination sleeve is a gear sleeve with teeth on the outer ring, and a second-gear driven gear is integrated on the first combination sleeve. The normally-meshed driven gear and the first-gear driving gear are fixedly assembled on the intermediate shaft, and the second-gear driving gear is rotationally assembled on the intermediate shaft; the second-gear synchronizer comprises a second gear hub fixed to the middle shaft and a second combination sleeve assembled on the second gear hub in a sliding mode. A second-gear driven gear is integrated on the first combination sleeve. SUMMARY In view of the above problems, the present invention discloses a longitudinal two-speed electric drive assembly and a new energy vehicle to overcome or at least partially solve the above problems. In order to achieve the above object, the present invention adopts the following technical solutions. According to the invention, a longitudinal two-speed electric drive assembly is provided. The longitudinal two-speed electric drive assembly comprises a drive motor, a power take-off mechanism and a transmission mechanism; the transmission mechanism comprises an input shaft, an intermediate shaft and an output shaft, the input shaft is connected to the drive motor for transmission, the output shaft and the input shaft are coaxially arranged and connected for transmission via a first clutch, the intermediate shaft and the output shaft are arranged in parallel, the input shaft is fi