CN-121989712-A - Dual-motor coupling driving system with mechanical and hydraulic dual outputs and vehicle

CN121989712ACN 121989712 ACN121989712 ACN 121989712ACN-121989712-A

Abstract

The invention belongs to the technical field of vehicle transmission, and particularly relates to a double-motor coupling driving system with mechanical and hydraulic double outputs and a vehicle. The power coupling is realized through a planetary gear mechanism, and a one-way clutch is utilized to automatically switch the working modes of torque coupling and rotational speed coupling according to the rotational speed directions of two power sources. Meanwhile, the system continuously drives the pump by partial power through the gear train, so that the hydraulic power is output in a homologous way. The intelligent automatic switching device is compact in structure, intelligent and automatic in mode switching, and power density, reliability and energy utilization efficiency are effectively improved.

Inventors

LIU KUN
LIU ZHENG
CHEN CHUNHAO
MA QIZHI
LI XUELIANG
WU WEI
GAO PU
YU LIANG

Assignees

燕山大学
北京理工大学

Dates

Publication Date: 20260508
Application Date: 20260331

Claims (8)

1. The double-motor coupling driving system with mechanical and hydraulic double outputs is characterized by comprising a fixed part, a first power source and a second power source, wherein the first power source and the second power source are arranged in the fixed part; Wherein, the first power source is in transmission fit with one end of a first fixed-axis gear train, and the other end of the first fixed-axis gear train is in transmission fit with an input shaft of a pump (3); the second power source is in transmission fit with a first planetary gear row and a second planetary gear row, a sun gear of the first planetary gear row is coaxially fixed with an output shaft of the second power source, a gear ring of the first planetary gear row is coaxially fixed with a gear ring of the second planetary gear row, and a planet carrier of the first planetary gear row is coaxially fixed with a planet carrier of the second planetary gear row; the gear ring of the first planet row is in transmission fit with the first fixed-axis gear train; the sun gear of the second planetary row is in transmission fit with one end of a second fixed-axis gear train, and the other end of the second fixed-axis gear train is used as an output shaft (11) to realize power output; the first power source and the second power source both have forward rotation and reverse rotation functions; the planetary gear transmission mechanism further comprises a one-way clutch (1), wherein the fixed end of the one-way clutch (1) is fixed with the fixed part, and the movable end of the one-way clutch (1) is coaxially fixed with the planet carrier of the second planetary row; The movable end of the one-way clutch (1) rotates forwards and locks reversely; The forward rotation direction of the movable end of the one-way clutch (1) is consistent with the forward rotation direction of the first power source.
2. The dual-motor coupling driving system with mechanical and hydraulic dual outputs according to claim 1, wherein the driving system is in a rotational speed coupling driving mode when the movable end of the one-way clutch (1) rotates in the forward direction, and is in a torque coupling driving mode when the movable end of the one-way clutch (1) is locked in the reverse direction.
3. The dual-motor coupled driving system with mechanical and hydraulic dual-output according to claim 1, wherein the first fixed-axis gear train comprises a first fixed-axis gear (6), a second fixed-axis gear (7) and a third fixed-axis gear (8) rotatably arranged in the fixed part; The first fixed shaft gear (6) is coaxially fixed with the output shaft of the first power source; the first fixed shaft gear (6) is meshed with the second fixed shaft gear (7), and the second fixed shaft gear (7) is meshed with the gear ring of the first planet row (4); The second fixed shaft gear (7) is in transmission with the third fixed shaft gear (8), and the third fixed shaft gear (8) is coaxially and fixedly connected with the input shaft of the pump (3).
4. The dual-motor coupled driving system with both mechanical and hydraulic outputs according to claim 1, wherein the second fixed-axis gear train includes a fourth fixed-axis gear (9) and a fifth fixed-axis gear (10) rotatably provided in the fixed part; The fourth fixed shaft gear (9) is coaxially and fixedly connected with the sun gear of the second planetary row (5), and the fourth fixed shaft gear (9) is meshed with the fifth fixed shaft gear (10).
5. The dual-motor coupling driving system with mechanical and hydraulic dual outputs according to claim 1, wherein the first power source is an electric motor.
6. The dual-motor coupling driving system with mechanical and hydraulic dual outputs according to claim 1, wherein the second power source is an electric motor.
7. The dual-motor coupling driving system with mechanical and hydraulic dual outputs according to claim 1, wherein the fixing part is a housing (2).
8. A vehicle comprising a dual-motor coupled drive system having dual outputs of mechanical and hydraulic as claimed in any one of claims 1 to 7.

Description

Dual-motor coupling driving system with mechanical and hydraulic dual outputs and vehicle Technical Field The invention belongs to the technical field of vehicle transmission, and particularly relates to a double-motor coupling driving system with mechanical and hydraulic double outputs and a vehicle. Background With the continuous improvement of the requirements of future battlefields on the mobility, weapon loading capacity and functional reliability of special vehicles, vehicle power systems are moving towards high power density, high integration and multifunctionality. In this context, a dual power source drive system has received attention as a new drive solution. The system usually adopts two power sources to work cooperatively, and has the advantages of reducing the size of a single power source, facilitating the arrangement of the whole vehicle, effectively improving the power density of a power system, simultaneously, keeping the power output when one power source fails, and remarkably improving the task reliability of a special vehicle. In addition, the double power sources can be driven efficiently under different working conditions through cooperative control, and the cruising ability of the vehicle is improved. In addition to driving, the special vehicle usually needs hydraulic power to support auxiliary systems such as steering and braking, which requires the power system to have mechanical and hydraulic dual output capability. However, existing dual power source drive techniques still have significant drawbacks. Firstly, in order to realize power coupling and working condition adaptation, the system needs to be switched between different modes such as torque coupling and rotating speed coupling. The prior art relies on a traditional clutch or synchronizer and a complex electric control system thereof to execute mode switching, which not only occupies precious drive system space and increases the maintenance difficulty and control complexity of the system, but also can have adverse effects on the drive efficiency and smoothness of the mode switching process. Secondly, in order to meet the hydraulic function requirement, the conventional scheme generally needs to provide an independent driving device for the hydraulic pump, which results in the system having complicated structure, increased weight, reduced space utilization rate and reduced energy utilization efficiency of the whole vehicle due to multiple energy conversion. Therefore, the prior art is difficult to realize a compact driving system with deep integration of mechanical and hydraulic power and intelligent automation of mode switching while ensuring efficient and smooth driving. In summary, the existing special vehicle driving system has the defects in power density, mode switching intellectualization, multifunctional integration and energy efficiency. Therefore, a need exists for a dual-motor coupled drive system with dual outputs of mechanical and hydraulic and a vehicle. Disclosure of Invention The invention aims to provide a double-motor coupling driving system with mechanical and hydraulic double outputs and a vehicle, so as to solve the problems. In order to achieve the above object, the present invention provides the following solutions: the double-motor coupling driving system with mechanical and hydraulic double outputs comprises a fixed part, a first power source and a second power source, wherein the first power source and the second power source are arranged in the fixed part; wherein, the first power source is in transmission fit with one end of a first fixed-axis gear train, and the other end of the first fixed-axis gear train is in transmission fit with an input shaft of a pump; the second power source is in transmission fit with a first planetary gear row and a second planetary gear row, a sun gear of the first planetary gear row is coaxially fixed with an output shaft of the second power source, a gear ring of the first planetary gear row is coaxially fixed with a gear ring of the second planetary gear row, and a planet carrier of the first planetary gear row is coaxially fixed with a planet carrier of the second planetary gear row; the gear ring of the first planet row is in transmission fit with the first fixed-axis gear train; the sun gear of the second planetary row is in transmission fit with one end of a second fixed-axis gear train, and the other end of the second fixed-axis gear train is used as an output shaft to realize power output; the first power source and the second power source both have forward rotation and reverse rotation functions; The one-way clutch is characterized by further comprising a one-way clutch, wherein the fixed end of the one-way clutch is fixed with the fixed part, and the movable end of the one-way clutch is coaxially fixed with the planet carrier of the second planet row; The movable end of the one-way clutch rotates forward and locks reversely; The forward direction of the movabl