Aluminum Rapid Prototyping Machining Car Motor Housing Screw On Installation

High-speed electric drive system is the power source of new energy vehicles and is an indispensable core component. As the heart of new energy vehicles, the electric drive system plays the role of the engine, ECU and Transmission in fuel vehicles, and has a greater impact on the core indicators of the kinetics, economy, comfort and safety of the whole vehicle performance of new energy vehicles. High-speed electric drive system compact structure, conducive to the vehicle layout and platform powertrain development, high energy density of the vehicle lightweight, cost reduction has a certain contribution, so a high degree of integration, high-speed transmission has become the development trend. With the increasing integration and speed of electric drive system, the transmission system has brought a series of industry problems.

The first generation of Zhu gears is physically integrated, saving the high voltage line. The second generation system did the integration of two bearings and three bearings, the third generation was matched according to the system of the whole vehicle, and the software of electromagnetic system was released in 2020. The fourth generation is the research on ultra-high speed oil-cooled combination lubrication. In terms of system integration, Zhu Gear is to dry out the product first and then slowly study the core technology, even in the basic theory of how to avoid some possibilities and thermal management problems, in the process of batch manufacturing processing technology is actually very important, SMT did share the asymmetric gears, Zhu Gear also has a multi-pressure angle bilateral gears, this gear can significantly improve the bearing pressure, and convex and concave gears, can This gear can greatly improve the single-sided contact force, which can be increased by 20%-30%, and has also obtained many international patents. The integrated development of electric drive assembly usually has two different paths, A program is to do the motor first and then the Reducer and then the assembly, B program is to do the reducer and then the motor reducer assembly and then the assembly assembly way.
Both ways are able to achieve integration, but the process and the risk of process quality in the middle is completely different.
When the motor is installed first, the motor can be tested independently, the motor does not flow to the next process when there is a problem, the motor to the reducer manufacturer to do, the reducer is exactly the same as the traditional, the degree of overlap is higher than the original, this final test, independent test after the motor, the system integration test is also no problem, this process reducer will need to add oil once to be able to achieve, in the highly integrated Under the condition of high integration, the motor may no longer be a complete motor, there may be a motor stator and rotor program, the strain is now doing the seven-in-one integration, the robot itself after the test to start doing the reducer.
The B program is to finish the reducer first, and then send the reducer to the manufacturer to do the motor, between the rotor and stator, especially in the case of very large magnetic force, how to smoothly install the stator and rotor, if it is an oil-cooled system, there are problems involving the oil seal, as well as how to ensure the accuracy of gear installation, and how to ensure that the bearings are not damaged. Here there is a new test of the Gearbox, after the test to the three motor stand, this in the future is not to produce oil leakage will also have a risk, in the motor manufacturer after the test, but also to do a test, the cost is increased.
To sum up, firstly, the company believes that the gearbox company has an advantage in electric drive system integration, especially high-speed integration, including assembly process, single unit testing and oil filling, EOL, etc. Another is the various NVH problems, transmission suppliers have the ability to solve, third, the reliability of the gear transmission system is the basic guarantee of the electric drive system, once the problem car can not run or even out of safety accidents, fourth, from our experience, from product development to mass production, is now two minutes of the beat, OL test standards and pass rate, the company used a year of time.