Hybrid power drive system

Abstract

The invention provides a hybrid power drive system, and belongs to the technical field of machinery. The problem that an existing hybrid power drive system is complex in structure, large in size and low in drive accuracy is solved. The hybrid power drive system includes an engine, a driving motor, an output shaft, a generator and a differential mechanism; an input shaft of the driving motor is provided with a first driving gear, the two ends of the output shaft are correspondingly provided with a first intermediate gear and a second intermediate gear, the first driving gear is meshed with the first intermediate gear, the second intermediate gear is connected with the differential mechanism in a drive mode, the engine, the generator and the driving motor are successively arranged in a coaxial mode, a rotating shaft of the engine penetrates into a rotor of the generator and is connected with the rotor of the generator in a drive mode, the rotating shaft of the engine is connected with a second driving gear through a clutch, and the second driving gear is meshed with the second intermediate gear. According to the hybrid power drive system, the radial and axial sizes are reduced, the structure is simplified, the manufacturing cost is lowered, the driving accuracy is improved, and the NVH performance and carrying of a whole vehicle are improved.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a hybrid power transmission system. Background technique [0002] With the lack of oil resources and the improvement of people's awareness of environmental protection, as well as the requirements of increasingly stringent environmental protection regulations, the application of hybrid vehicles is becoming more and more popular. There are currently two kinds of transmission systems for hybrid electric vehicles that are more popular, one is a power-split hybrid system; the other is a range-extended hybrid system. [0003] The first type of transmission system uses a planetary gear mechanism to introduce at least two power sources, and the stepless speed change can be realized by adjusting the speed of the power sources. After several generations of improvements, better fuel economy has been achieved. However, since the torque of the power source acts on different nodes of the torqu...

AI Technical Summary

Problems solved by technology

Although the driving device of the hybrid electric vehicle has high transmission efficiency and good dynamic performance, it still has the following defects: in the driving device, it has a total of 4 shafts, including an engine shaft, an electric motor shaft, an output shaft and a differential shaft, and the 4 shafts The axes are located in different positions, that is, the four axes are set off-axis. During the operation, due to the force deformation of each axis and the manufacturing error of each axis, it will make it difficult for each axis to maintain an accurate axis center position. , the transmission accuracy between the gears of each shaft is low, and it is difficult to control the NVH performance

[0005] Due to the limitation of the installation space on the car, in order to improve the transmission accuracy between the gears of each shaft, the existing conventional methods usually include the following: 1. Each shaft is made of new high-strength materials to reduce stress deformation , but the cost of research and development is high, and it is difficult to implement

2. Improve the machining accuracy of each axis and ensure the accuracy of the axis position, but the production is more difficult and the production cost is higher

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