驱动桥设计外文翻译.doc

PAGE \* MERGEFORMAT 4 Car drive axle design 1 Introduction The structure form of the main reducer is based on the type of the gear and the way of the active gear and the driven gear. 2 drive axle Drive axle in the tail end of the power transmission system, its basic function is to increase the torque came by the drive shaft or transmission, the reasonable distribution of power to the left and right driving wheels, and also bear role of road and the frame or body between vertical and longitudinal force and lateral force. The drive axle is composed of a main reducer, a differential, a wheel drive device and a drive axle housing. Reducer is the original motivation and independent of the working machine between the closed transmission, used to reduce speed and increase torque to meet the needs of a variety of working machinery. According to transmission form can be divided into three different for the gear reducer, worm reducer and planetary reducer; in accordance with the transmission of the series can be divided into single and multistage speed reducer; according to transmission layout situation can be divided for expansion, shunt type and coaxial type reducer. Gear reducer transmission efficiency and high reliability, long service life, maintenance is simple, and therefore the scope of application is very wide. 2.1 main reducer The main reducer gear has the spiral bevel gear type, the type of the double curved surface gear type, the type of the cylindrical gear and the worm gear and so on. At present, the main reducer gear of the automobile drive axle adopts spiral bevel gear. When the load is high, the work is stable, the noise is small, and the contact load on the tooth surface is low. So the use of single bevel gears. 2.1.2 main reducer drive, driven bevel gear support form The car driving axle design, so the use of cantilever installation. The using of the cantilever installation, ensure that the gear stiffness, active gear shaft neck sho