Shuguang Axle is one of the main businesses of Liaoning Shuguang Automotive Group Co., Ltd., in particular, the light axle is a leading position in the industry. Shuguang Axle has a state-level enterprise technology center and has long been committed to proactive new product development and application and promotion of new technologies.
Dawn Axle follows the development of the automotive industry and began research and development of pure electric drive axles three years ago. The R&D direction established in the early stage of R&D is integrated and integrated, and it is determined to develop a new type of highly integrated pure electric power unique to Dawning. Drive the axle.
Sugon coaxial direct drive electric axle
Research and development of pure electric axles
In the concept design period of more than a year, Twilight Axle confirmed the technical line of direct coaxial connection. After more than two years of efforts, it successfully developed a coaxial direct-drive pure electric drive axle.
In 2013, the “Electric Vehicle Coaxial Direct Drive Axle Assembly†patent filed by the Shuguang Axle Institute won a utility model patent certificate issued by the State Intellectual Property Office. Sugon's coaxial direct-drive pure electric drive axle is uniquely designed and pioneered by the industry, and is listed as the focus of innovation in Liaoning Province.
In November 2014, the first prototype of the coaxial direct-drive pure electric drive axle was successfully rolled out, and it was verified by major customers in the same year.
Dawning coaxial direct-drive pure electric drive axle has the advantages of structure, weight and performance. It is improved on the basis of the structure of the integral electric drive axle, and solves the problem that the existing integral electric drive axle structure can not be satisfied. Match the problem of chassis requirements for various models. First, Dawning coaxial direct-drive pure electric drive axle integrates the drive motor into the interior of the drive axle. The motor housing is shared with the axle housing and the drive is more stable; then, the drive motor is integrated with the speed reduction mechanism, and the planetary speed reduction mechanism is used to achieve The input and output are coaxial and have the advantages of even distribution of torque without offset, low vibration, low noise, etc. Finally, the planetary differential is integrated with planetary deceleration. The compact and reasonable structure design has the functions of driving, deceleration, and differential speed, and it is also conducive to meeting the requirements of various electric vehicle chassis.
After the structural design of the drive axle was over, much work was done on material selection. The first thing to consider is the performance of the parts. When the performance meets the requirements, consider the weight and cost of the product. The density of commonly used cast iron materials for axles is approximately 7.3 g/cm3, and the density of commonly used aluminum alloys for automobiles is approximately 2.7 g/cm3. If the shell is made of cast iron material, the weight is about 37kg, and the aluminum alloy material is used. Its weight is about 13.7kg. The weight of aluminum alloy is only 37% of cast iron. The axle adopts aluminum alloy material, which greatly reduces the weight of the axle and has good heat dissipation performance. Different materials were selected for CAE simulation analysis and aluminum alloy materials were selected as the motor housing material.
Platform planning and operation
The development of Dawning coaxial direct-drive pure electric drive axles is of epoch-making significance to Shuguang and even the entire industry. Shuguang also plans a platform for this product. The platform plans a series of products according to the model and the weight of the carrier, which are applicable to standard micro-customers, micro-subsidiaries, SUVs, light passengers, large-scale light passengers, and China-Pakistan models. The demand of the market, the electric drive axles of each model will be launched in succession.
Shuguang Co., Ltd. has continuously improved and developed the coaxial direct-drive pure electric drive axle, and is further optimizing the planetary speed reduction according to the requirements of customers. Because the pure electric car does not have the roar of the engine, the vehicle is particularly quiet when driving, and the mechanical transmission of the gear will always have noise, so the noise of the mechanical transmission will be very obvious, and the noise of the gear transmission is obviously in accordance with the standard requirements of the fuel-powered automobile. is not enough. According to customer requirements, the noise index is controlled within 70dB. It is expected that the optimized products can be submitted in October 2015, and the customer organization will verify the product performance in November.
At the same time, Shuguang Company is still building an EDA project. EDA is a platform-oriented and serialization project. Its technology line is coaxial direct connection technology. EDA's first pure electric axle was developed for minibuses with a capacity of 1.3 tons, output torque of 1500 N·m, and a maximum speed of 90 km/h.
Diversified products
Starting from October 2015, the development of other series of products will be launched one after another. According to the bearing capacity of the products, there are planned series of products such as 1.6t, 2.0t, 2.5t, 5t, and 7.5t. Its intention is to cover miniature, light, medium and heavy models.
In 2015, Shuguang Axle partnered with Beijing Automotive New Energy Co., Ltd. to jointly develop a high-speed, high-torque, dual-stage deceleration electric drive module assembly that integrates a drive motor and a two-stage retarder as an integrated electric drive module. The product is horizontally mounted and suspended from the underside of the body through a suspension, which can effectively reduce vibration and shielding noise. It is suitable for cars, micro and light passenger cars.
In the area of ​​electric drive axles, Shuguang Axle has a multi-technology, multi-platform, and multi-series of diversified products that will cover miniature, light, and medium- and heavy-duty passenger vehicles.
Twilight Axle insight into market changes, investment in design analysis software and test verification has exceeded 10 million yuan, increase the research and development efforts of electric axles, special set up electric axle research and development departments, recruit talents, build a strong R & D team. With the development of electric drive axles, Shuguang Axle will also devote itself to the research on standardization of electric drive axles and research on test conditions, and will make Shuguang a top-ranking electric drive axle development, test and production base. In the future, more new products will be developed to help the development of the new energy automotive industry.
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