In the field of new energy vehicles, the performance and efficiency of the powertrain is crucial. With innovation and excellence in aluminium die casting field, Tianhe Mechanical has co-launched the electric drive housing – an innovative product that combines high performance and economy, with end client.
The case is an electric drive housing, material: Aluminium Alloy; weighing 20kg for the left case, 66.5kg for the middle case, and 25.7kg for the right case, making the overall powertrain lighter and improving the efficiency of energy utilisation.
The advantage of the electric drive housing is that it optimises the problem of large span of the coupling bolts between the drive motor and the gearbox, which effectively solves the NVH (noise, vibration and harshness) problem at the coupling. In addition, its small axial dimensions, low weight and low overall cost enable new energy vehicle manufacturers to produce high-performance powertrains more economically.
The electric housing is designed to be highly scalable, and can be adapted to different drive motor and gearbox configurations. Meanwhile, friction welding technology is used to reduce structural complexity and improve overall structural stability and reliability.
In the manufacturing process, the company has invested a new CMM from Zeiss, valued at more than 2 million, to ensure the high precision of machining dimensions.
Although electric drive housing has some disadvantages in terms of casting complexity and mould structure, which requires high-precision machining equipments and complex machining process choreography, Tianhe Mechanical successfully overcame these difficulties by adopting the low-pressure casting method and sand core formation technology.
According to the characteristics of the product structure, the sprue and the position where the mould cannot be taken are formed by sand core, the sand core adopts the core grouping method, 70~140 mesh coated sand is used, the core is made by metal-type hot-core box, and the outer shape is dipped in paint to ensure the quality of the appearance.
The pouring system adopts the straight pouring channel to divert the inner pouring channel and then feed the material, using double water inlet, which increases the smoothness of the metal liquid flow in the process of filling the mould of the product.
For the problem of large products, many hot joints and easy to shrink and loosen, the company chooses the water circulation system to cool the middle thick part of the product where the riser cannot be placed to ensure the performance and quality of the product [1].
At present, Tianhe Mechanical cooperates with international enterprises, electric drive housing has been widely used in hydrogen energy trucks, and has been inspected by national leaders and international dignitaries for many times, fully demonstrating its leading position and excellent performance in the field of new energy vehicles.
Looking ahead, it plans to develop electric drive housings for dual motors to meet the demand for more efficient power output. At the same time, the company is also developing a single-motor, two-speed electric drive housing, a more economical design that will meet market demand for more cost-effective power systems for new energy vehicles.
Deyang Tianhe Mechanical Manufacturing Co., Ltd. will continue to be committed to innovation and excellence, providing more efficient and reliable aluminium alloy low pressure die casting products for the new energy vehicle industry, promoting the development of new energy vehicles, and making greater contributions to the construction of a better home and the realisation of sustainable development.
Post time: Apr-29-2024