Shulou(Shulou.com)11/24 Report--

CTOnews.com Sept. 1 news, Red Flag Automobile officially announced today that it has successfully broken through a number of key core technologies such as high-performance hypoid gear development and high transmission efficiency drive axle assembly.

Hongqi Automobile said that after 27 months of simultaneous and independent development of four drive axle products and successful mass production, the project team eliminated the risk of "neck jam" of the whole vehicle drive axle on Hongqi L platform, and filled the gap in domestic passenger car high-performance and high-torque drive axle products. the core performance index of the product has reached the international first-class level.

According to reports, at present, all the independent high-performance and high-torque series drive axles are in mass production, saving more than 2000 million in development costs compared with entrusted development, and the cost reduction of Hongqi L series models matching independent drive axles is more than 40,000 yuan at most, and produces more than 30 invention patents and 15 enterprise standards.

The official introduction of CTOnews.com with Red Flag Automobile is as follows:

The hypoid gear pair of drive axle adopts the tooth profile design of large coincidence degree and low transmission error, which can effectively reduce the fluctuation of meshing stiffness and meshing vibration. Combined with the first developed "grinding-shot peening-lapping" process, the meshing noise of gear pair is lower than 64.5dB (A), leading the industry advanced level 3dB (A) ~ 5dB (A), and the NVH performance of the whole vehicle is better than that of foreign competitors.

The drive axle adopts a longitudinal layout scheme, which can eliminate differential bearing housings and other parts, reduce the weight by about 8%, and adopt innovative structural design schemes such as low-pressure casting high-strength aluminum alloy shell, hollow active bevel gear, differential shell and driven bevel gear integrated design, which can reduce the weight by about 12%. The ultimate output torque of the assembly exceeds 20000Nm and the weight is lower than that of foreign competitors 5kg~8kg.

The drive axle adopts the design scheme of high efficiency spatter lubrication system and low viscosity lubricating oil to ensure good lubrication effect while reducing the amount of assembly lubricating oil and greatly reducing the loss of oil stirring. The use of low rolling resistance tapered roller bearings, thrust roller bearings, effectively reduce the friction loss of bearings, the highest efficiency of the assembly is more than 98%.

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