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The 12-speed dual countershaft full synchronizer gearbox (CA12TA210M2) jointly developed by the Technology Center and the Liberation Transmission Branch has passed the bench test, road test, and user test to achieve a design target of 800,000 kilometers of life. . The successful development of this product completely solves the worldwide problem of the double countershaft gearbox increasing the synchronizer structure.
The structure of the double countershaft transmission is characterized by the use of two sets of countershaft gears to transmit torque in order to increase the bearing capacity. Because the two countershaft gears need to mesh with one main gear to transmit power, in order to ensure the uniformity of transmission power, double The mainshaft and mainshaft gears of the countershaft gearbox use a floating structure to balance the load. Its compact structure and strong bearing capacity are favored by the market. At the same time, due to its lack of synchronizer, the disadvantages of shifting and fuel consumption (requiring two-legged clutch shifting) are also exposed. Many transmission companies at home and abroad have carried out the research and development of the double countershaft gearbox to increase the synchronizer structure, and some products have been introduced. However, they cannot break through the technical barriers affecting the synchronizer reliability of the double intermediate gearbox mainshaft gear floating structure.
At the beginning of 2011, Liberation Transmission Division focused on the ever-increasing demand for synchronizer gearboxes in the heavy-duty truck market and actively conducted in-depth market research to understand user needs. After mastering the first-hand market demand information, it quickly implemented a 12-speed dual countershaft full synchronizer. The development of transmission products, the product's structural design adopts advanced patented technology, this technology not only meets the requirements of double countershaft gear floating, but also avoids the impact of gear floating on the synchronizer, two-axis installation structure and synchronization The operating conditions of the device are the same as for the single countershaft. In September of the same year, this double countershaft full synchronizer gearbox was granted patent approval (Grant No. ZL200120371601.5).
At the same time, after the structure of the product passed the design review of the Technical Center, the rig test was completed in July 2012. The fixed-point user test review was completed in December 2012 and the road test was completed. Fixed-point users fully affirmed the use of the 12-speed full-synchronous gearbox. They commented that the 12-speed full synchronizer gearbox is smooth, comfortable, and fuel-efficient. The characteristics are very prominent. It is more than 200,000 kilometers for the gearbox to run synchronously. Without replacing or repairing the device, it is full of praise. This product is not in the same grade as the products they used in the past. Liberating the 12-speed full synchronizer gearbox is what we hope for is a truly high-tech speed change. box.
It is reported that the liberation of the 12-speed full synchronizer gearbox has been matched in batches to liberate the J6 heavy truck, which will add new selling points to increase the sales of liberated brands.