Nine-gear synchronizer transmission for heavy-duty automobile

Abstract

The invention specifically provides a nine-gear synchronizer transmission matched with an engine with the power of 280-320. By adoption of the nine-gear synchronizer transmission, the problem that the synchronization performance and power performance of an existing transmission are poor is solved. A main case and a range-gear auxiliary case located behind the main case are arranged in a shell. The main case is of a double-auxiliary-shaft structure, and an input shaft, auxiliary shafts, a main shaft, transmission gears and a reverse-gear idle wheel are arranged in the main case. The first-gear transmission gear, the second-gear transmission gear, the third-gear transmission gear and the fourth-gear transmission gear are provided with high-reliability double-cone steel-based molybdenum-sprayed lock ring type synchronizers correspondingly. End face bearings are arranged on the two sides of the reverse-gear idle wheel. The range-gear auxiliary case is a planetary mechanism, and a sun gear, a planetary gear, an output shaft and a single-cone steel-based molybdenum-sprayed lock ring type synchronizer are arranged in the range-gear auxiliary case. A forced lubricating oil pump is arranged on the front portion of the main case. A rear power takeoff is arranged on the rear portion of the range-gear auxiliary case. The nine-gear synchronizer transmission is reasonable and reliable in structural design, the problem of poor synchronization performance and power performance of the existing transmission is solved, the controllability and power performance of the transmission are improved, the service life of the transmission is prolonged, and performance requirements for the transmission under various complex road conditions are met.

Description

technical field [0001] The invention relates to a transmission, in particular to a nine-speed synchronizer transmission for a heavy-duty vehicle matched with a 280-320 horsepower engine. Background technique [0002] With the rapid development of domestic highway construction and the continuous strengthening of policies to limit overloading, the number of domestic heavy-duty vehicles is increasing, and the reliability, handling and power of vehicles have become important performances of complete vehicles. In the domestic truck market, the market demand for synchronizer transmissions matching the engine power range of 280-320 horsepower and engine output torque of 1200-1600Nm is also increasing. However, in the existing transmissions, it is difficult to shift gears without a synchronizer on the double layshafts, which requires high experience of the operator, and the synchronization performance is poor; the reliability of the floating state of the double layshafts using ordin...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor synchronous performance and power performance of the existing transmission, the present invention provides a nine-speed synchronizer transmission for heavy-duty vehicles

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