一种电动非道路工程机械用动力系统
By adopting a dual-motor + dual-input reducer solution, the problems of power interruption and structural complexity of traditional drive solutions are solved, achieving efficient and reliable power transmission and high power output, thereby improving the efficiency and reliability of non-road construction machinery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LESHENG BOER ELECTRIC (SHANGHAI) CO LTD
- Filing Date
- 2025-09-26
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional drive systems for off-road construction machinery suffer from problems such as power interruption, power jerking, complex gearbox structure, high failure rate, high maintenance costs, and limited power of a single motor.
The system adopts a dual-motor + dual-input reducer scheme, with two motors as input sources and matched with a single-gear reducer. Through the coordinated work of the two motors, the system meets the low-speed traction and high-speed requirements of the vehicle, avoiding gear switching. A bidirectional mechanical pump is used to provide lubrication and heat dissipation.
It achieves power transmission without gear shifting, improving efficiency and driving experience, reducing failure rate and maintenance costs, meeting high power requirements, and still being able to run even in the event of motor failure.
Smart Images
Figure CN224510854U_ABST
Abstract
Claims
1. A power system for an electric off-highway construction machine, characterized by, It includes a first motor, a second motor, and a reducer, wherein: The first motor and the second motor are arranged on the left and right sides respectively, and the rear end of both the first motor and the second motor is integrated with a motor controller. The reducer is a two-stage reducer, which has a first input shaft, a second input shaft, an intermediate shaft, and an output shaft. Input shaft gears are respectively mounted on the first and second input shafts. An intermediate shaft pinion and a intermediate shaft gear are mounted one in front of the other on the intermediate shaft. An oil pump power take-off gear and an output shaft gear are mounted one in front of the other on the output shaft. An output flange is connected to the front end and / or rear end of the output shaft. The first input shaft and the second input shaft are respectively connected to the output shafts of the first motor and the second motor via splines; The input shaft gears of the first input shaft and the second input shaft respectively mesh with the large gear of the intermediate shaft; The intermediate shaft pinion meshes with the output shaft gear; A bidirectional mechanical pump is installed at the bottom of the reducer, and the oil pump gear on the output end of the bidirectional mechanical pump meshes with the oil pump power take-off gear.
2. The power system for an electric off-road working machine according to claim 1, characterized by, The bidirectional mechanical pump delivers lubricating oil to each shaft and gear of the reducer.
3. The power system of claim 1, wherein, A heat exchanger is installed above the reducer, and the lubricating oil pumped out by the bidirectional mechanical pump flows through the reducer housing to the heat exchanger for heat dissipation.
4. The power system of claim 1, wherein, A parking brake is installed on the output flange side of the reducer.
5. The power system of claim 1, wherein, The first-stage reduction of the reducer involves the input gears of the first and second input shafts meshing with the large gear on the intermediate shaft, forming a power confluence on the intermediate shaft; the second-stage reduction of the reducer involves the small gear on the intermediate shaft meshing with the output shaft gear, and the intermediate shaft transmitting power to the output shaft.
6. The power system of claim 1, wherein, The transmission speed ratio of the reducer can be adjusted by changing the number of teeth on the large gear and the small gear on the intermediate shaft, while keeping the center distance between them constant.
7. The power system of claim 1, wherein, The front end of the output shaft is fitted with a front output flange via a spline, or the rear end of the output shaft is fitted with a rear output flange via a spline, or the front and rear ends of the output shaft are fitted with a front output flange and a rear output flange via splines, respectively.