传动轴是汽车传动系中传递动力的重要部件，它的作用是与变速箱、驱动桥一起将发动机的动力传递给车轮，使汽车产生驱动力。按照使用万向节的不同，可将传动轴分为等速传动轴和非等速传动轴。等速传动轴通常用于轿车，非等速传动轴主要用于商用车和工程机械上，目前部分MPV、SUV上也使用非等速传动轴。
The transmission shaft is an important part of the transmission power in the automobile transmission system. Its function is to transmit the power of the engine to the wheels together with the gearbox and the drive axle, so that the driving force of the car is generated. According to the use of universal joint, the drive shaft can be divided into constant speed drive shaft and non constant speed drive shaft. The constant speed drive shaft is usually used in cars, and the non constant speed drive shafts are mainly used in commercial vehicles and construction machinery. At present, non constant speed drive shafts are also used on some MPV and SUV.
国际上独立传动轴供应商主要有英国吉凯恩GKN、日本恩梯恩NTN、美国耐世特 Nexteer（被中航收购）、韩国现代威亚WIA等公司。其中GKN集团是行业的领先者，全球市场份额超过40%。在中国，汽车传动轴行业主要由两大阵营组成。第一阵营是国外知名传动轴企业在国内的合资或独资企业，凭借设备和技术优势，品牌知名度，主要为外资或合资乘用车企业配套，比如吉凯恩的合资公司上海纳铁福，在等速传动轴市场几乎占据一半的市场份额。第二阵营主要是具有一定历史和规模的本土企业，凭借良好的产品质量和一定的价格优势，与国内商用车企业有长期合作关系，在国内非等速传动轴市场上占有绝对优势，比如许昌远东，单从产量来看，可进世界前三。总体而言，本土企业竞争力还是相对较低，尤其是等速传动轴，很难进入国际配套市场。
The transmission shaft independent suppliers are mainly British GKN, Japan NTN, GKN entien America nexteer Nexteer (by AVIC acquisition), Hyundai WIA WIA company. Among them, GKN group is the leader of the industry, the global market share is more than 40%. In China, the automobile transmission shaft industry is mainly composed of two camps. The first group is a joint venture or foreign investment enterprises in the domestic and foreign well-known transmission shaft, with equipment and technology, brand awareness, mainly for foreign or joint venture car enterprises, such as the joint venture company GKN Shanghai Natiefu, in constant velocity drive shaft according to the market accounted for almost half of the market share. The second camp is mainly has a certain history and scale of local enterprises, with good product quality and price advantage, have long-term cooperation relations with the domestic commercial vehicle enterprises, has an absolute advantage in the domestic market, such as non constant speed drive shaft Xu Changyuandong, from the production point of view, in the top three in the world. Overall, the competitiveness of local enterprises is still relatively low, especially the constant speed transmission shaft, it is difficult to enter the international supporting market.
传动轴是保证车辆安全行驶的重要部件，所以技术要求较高，主要是体现在动平衡、耐磨性、抗疲劳等方面。另外，受“节能减排，轻量化”的影响，一些知名传动轴企业在材料替换、结构设计上也开始加大投入。中国虽然是传动轴生产大国，但还不是强国，即便在非等速传动轴行业，很多企业，因为对下游客户缺少定价权，又无法转嫁成本，在研发和设备投入有限，还一直走着”仿制“的路子。技术、设备、研发能力的滞后性，使得产品索赔率较高，这已是商用车传动轴行业共性问题。
The transmission shaft is an important component to ensure the safe driving of the vehicle, so the technical requirements are high, mainly reflected in the dynamic balance, wear resistance, fatigue and other aspects. In addition, due to the "energy saving, emission reduction, lightweight" impact, some well-known transmission shaft enterprises in the material replacement, structural design also began to increase investment. Although China is a big producer of transmission shaft, but it is not a powerful country, even in the non constant speed transmission shaft industry, many enterprises, because the downstream customers lack pricing power, and can not pass on the cost, in the R & D and equipment investment is limited, has been walking "imitation" approach. The lag of technology, equipment and R & D capability makes the product claim rate higher, which is the common problem of the commercial vehicle transmission shaft industry.
目前整个汽配行业，全球化和集中化程度越来越高，模块化供应商是未来发展的一个必然趋势。中国正处于汽车工业高速发展的十年黄金期，是机遇也是挑战，只有将企业做大做强，才能造就超越竞争对手的核心竞争优势。
At present, the entire auto parts industry, globalization and concentration of higher and higher, modular suppliers is an inevitable trend of future development. China is in the golden age of ten years of rapid development of the automotive industry. It is both an opportunity and a challenge. Only by making the enterprise bigger and stronger can we create the core competitive advantage beyond our competitors.