中英行星齿轮机构.doc

行星齿轮机构? Planet gear mechanism 自动变速器动力传递概述? An overview of power transfer to automatic transmission 自动变速器由液力元件、变速机构、控制系统、主传动部件等几大部分组成。变速机构可分为固定平行轴式、行星齿轮式和金属带式无级自动变速器（CVT）三种。我国在用的车辆中，大多数自动变速器都采用行星齿轮式变速机构，这也是本文重点分析的对象。行星齿轮机构一般由2个或2个以上行星齿轮组按不同的组合方式构成，其作用是通过对不同部件的驱动或制动，产生不同速比的前进挡、倒挡和空挡。 Automatic transmission consists of hydraulic components, shifting mechanism, control system, main drive components, such as several major components.?Variable speed mechanism can be divided into fixed parallel shaft, planetary gear type and metal belt type stepless automatic transmission (CVT) three. In with the traffic in our country, most of the automatic transmission adopts planetary gear transmission mechanism, it is also this article focus on the analysis of the object. Planetary gear mechanism by two or more commonly planetary gear set according to the different way of combination, its effect is through the different parts of driving or braking, produce different ratio of forward gears, reverse and neutral. ? 换挡执行元件的作用是约束行星齿轮机构的某些构件，包括固定并使其转速为0，或连接某部件使其按某一规定转速旋转。通过适当选择行星齿轮机构被约束的基本元件和约束方式，就可以得到不同的传动比，形成不同的挡位。换挡执行元件包括离合器、制动器和单向离合器3种不同的元件，离合器的作用是连接或驱动，以将变速机构的输入轴（主动部件）与行星齿轮机构的某个部件（被动部件）连接在一起，实现动力传递。制动器的作用是固定行星齿轮机构中的某基本元件，它工作时将被制动元件与变速器壳体连接在一起，使其固定不能转动。单向离合器具有单向锁止的特点，当与之相连接的元件的旋转趋势使其受力方向与锁止方向相同时，该元件被固定（制动）或连接（驱动）；当受力方向与锁止方向相反时，该元件被释放（脱离连接）。由此可见，单向离合器在不同的状态下具有与离合器、制动器相同的作用。?????由以上介绍可知，掌握不同组合行星齿轮机构的运动规律是自动变速器故障诊断的基础。 Shift the function of actuators is constraint planetary gear mechanism certain artifacts, including fixed and rotating speed of 0, or a portion of the connection to make it by a certain regulation rotate speed. Through the selection of appropriate planet gear mechanism are the basic components and constraints, can get different transmission ratio, form the different place. Shift actuators include the clutch, brake and one-way clutch three different components, the function of the clutch is connected or driver, to shift gear of input shaft (active components) and planetary ge