CN-121989652-A - Two-gear electric drive system and vehicle

CN121989652ACN 121989652 ACN121989652 ACN 121989652ACN-121989652-A

Abstract

The invention discloses a two-gear electric driving system and a vehicle, which relate to the technical field of electric driving systems and comprise a motor with a motor shaft, a main transmission module arranged on the motor shaft, a first output shaft, a second output shaft, a differential mechanism assembly, a first driven gear module, a second driven gear module and one/two synchronizers, wherein the first output shaft and the second output shaft are different from the motor shaft, the differential mechanism assembly, the first driven gear module, the second driven gear module and one/two synchronizers.

Inventors

YU XINWEI
PEI TAOHONG
LI YUQIANG

Assignees

麦格纳动力总成(江西)有限公司

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (10)

1. A two-speed electric drive system, comprising: The device comprises a motor with a motor shaft, a main transmission module arranged on the motor shaft, a first output shaft and a second output shaft which are mutually different from the motor shaft, a differential mechanism assembly, a first driven gear module, a second driven gear module and one/two synchronizers; Wherein the electric drive system is formed by a first combination/a second combination; When the electric drive system is formed by a first combination mode, two synchronizers in the electric drive system are respectively a first synchronizer A and a second synchronizer A; The first driven gear module and the second driven gear module are respectively sleeved on the first output shaft and the second output shaft in a hollow mode and are meshed with the main transmission module on the motor shaft; The first synchronizer A and the second synchronizer A are respectively arranged on the first output shaft and the second output shaft; Wherein power of the motor is selectively transmitted to the differential assembly through a first speed ratio path/a second speed ratio path by a combination of the first driven gear module and the first synchronizer a/a combination of the second driven gear module and the second synchronizer a.
2. The two-speed electric drive system of claim 1 wherein when the electric drive system is formed by a first combination; The first driven gear module comprises a first driven gear A and a first driven gear ring which are arranged on the first output shaft, and the second driven gear module comprises a second driven gear A and a second driven gear ring which are arranged on the second output shaft.
3. The two-gear electric drive system of claim 2, wherein the main transmission module is a driving gear A, and the driving gear A is in constant mesh with the first driven gear A and the second driven gear A at the same time.
4. The two-gear electric drive system of claim 2, wherein the main transmission module is two separated first driving gears B and second driving gears B, one of the first driving gears B and the second driving gears B is always meshed with the first driven gear A, and the other of the first driving gears B and the second driving gears B is always meshed with the second driven gear A.
5. The two-speed electric drive system of claim 1 wherein the synchronizer of the electric drive system is a synchronizer B when the electric drive system is formed by the second combination; The main transmission module comprises a first main transmission unit and a second main transmission unit which are arranged on two sides of the synchronizer B; the first output shaft is meshed with the first main transmission unit through the first driven gear module; The second output shaft is meshed with the second main transmission unit through the second driven gear module; Wherein power is transferred to the differential assembly through either a first or second speed ratio path by selectively engaging the synchronizer B with either the first or second main drive unit.
6. The two-speed electric drive system of claim 5 wherein the first driven gear module is a first driven gear B.
7. The two-speed electric drive system of claim 5 wherein the second driven gear module is a second driven gear B.
8. The two-speed electric drive system of claim 5 wherein the first main drive unit includes a first drive gear and a first drive ring gear and the second main drive unit includes a second drive gear and a second drive ring gear.
9. The two-speed electric drive system of claim 1 wherein when the electric drive system is formed by either of a first combination/a second combination; The first output shafts are provided with first output shaft teeth, and the second output shafts are provided with second output shaft teeth; wherein, first output shaft tooth and second output shaft tooth all with the main subtracting gear constant mesh of differential mechanism assembly.
10. A vehicle comprising a vehicle body and a two-speed electric drive system according to any one of the preceding claims 1-9 for assembly on the vehicle body.

Description

Two-gear electric drive system and vehicle Technical Field The invention relates to the technical field of electric drive systems, in particular to a two-gear electric drive system and a vehicle. Background The electric drive system is used as a core component of the electric automobile, the performance of the electric drive system directly influences the dynamic property and economy of the whole automobile, and a two-gear speed change scheme is commonly adopted in the industry at present for balancing the requirements of the automobile on high output torque during starting and climbing and the requirements on economy and high efficiency during high-speed cruising. Typically, a lower gear employs a larger speed ratio to provide a strong torque output, while a higher gear employs a smaller speed ratio to achieve higher vehicle speeds and better energy efficiency. However, in the existing two-gear electric drive system, the input gears and the output gears of the low-gear and the high-gear are usually designed coaxially, and the coaxial layout is limited by the axial space limitation although the structure is relatively simple, so that the speed ratio span between the low-gear and the high-gear (i.e. the ratio of the speed ratio of the low-gear to the speed ratio of the high-gear) is difficult to be large, and the speed ratio span is limited, so that the power assembly requirement of the vehicle with strong off-road property is difficult to meet. Disclosure of Invention Based on the above, the invention aims to provide a two-gear electric drive system and a vehicle, so as to solve the technical problems that in the prior two-gear electric drive system in the background art, input gears and output gears of a low gear and a high gear are usually coaxially designed, the speed ratio span is limited, and the power assembly requirement of the vehicle with strong off-road attribute is difficult to meet. An aspect of the present invention is to provide a two-gear electric drive system including: The device comprises a motor with a motor shaft, a main transmission module arranged on the motor shaft, a first output shaft and a second output shaft which are mutually different from the motor shaft, a differential mechanism assembly, a first driven gear module, a second driven gear module and one/two synchronizers; Wherein the electric drive system is formed by a first combination/a second combination; When the electric drive system is formed by a first combination mode, two synchronizers in the electric drive system are respectively a first synchronizer A and a second synchronizer A; The first driven gear module and the second driven gear module are respectively sleeved on the first output shaft and the second output shaft in a hollow mode and are meshed with the main transmission module on the motor shaft; The first synchronizer A and the second synchronizer A are respectively arranged on the first output shaft and the second output shaft; Wherein power of the motor is selectively transmitted to the differential assembly through a first speed ratio path/a second speed ratio path by a combination of the first driven gear module and the first synchronizer a/a combination of the second driven gear module and the second synchronizer a. Further, when the electric drive system is formed by a first combination; The first driven gear module comprises a first driven gear A and a first driven gear ring which are arranged on the first output shaft, and the second driven gear module comprises a second driven gear A and a second driven gear ring which are arranged on the second output shaft. Further, the main transmission module is a driving gear A, and the driving gear A is simultaneously meshed with the first driven gear A and the second driven gear A. Further, the main transmission module is provided with a first driving gear B and a second driving gear B which are separated, one of the first driving gear B and the second driving gear B is in constant mesh with the first driven gear A, and the other of the first driving gear B and the second driving gear B is in constant mesh with the second driven gear A. Further, when the electric drive system is formed by the second combination, the synchronizer of the electric drive system is a synchronizer B; The main transmission module comprises a first main transmission unit and a second main transmission unit which are arranged on two sides of the synchronizer B; the first output shaft is meshed with the first main transmission unit through the first driven gear module; The second output shaft is meshed with the second main transmission unit through the second driven gear module; Wherein power is transferred to the differential assembly through either a first or second speed ratio path by selectively engaging the synchronizer B with either the first or second main drive unit. Further, the first driven gear module is a first driven gear B. Further, the second driven gear module is a secon