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换向机构在技术革新中,常常会遇到需要使机器某个机件运动方向发生变化的问题。有些机构,如凸轮机构、曲柄连杆机构,本身能实现连续的不断的换向(往复运动)。此外,还可以选择电力换向(使电动机反转)和液压换向(改变油压方向)。这里准备介绍几种常见的机械式换向机构。一、三星轮换向机构如图1所示,带手柄的摆杆有三个位置。在中间位置0时,主动齿轮Z_1不与中间的两个惰轮Z_3、 Z_4
Commutation agencies in technological innovation, often encounter the need to make the movement of a machine movement direction of the problem. Some institutions, such as the cam mechanism, crank linkage, itself can achieve continuous continuous commutation (reciprocating motion). In addition, power commutation (reversing the motor) and hydraulic commutation (changing the hydraulic direction) are also available. Here are some common types of mechanical change-over mechanisms. First, the Samsung rotation to the body shown in Figure 1, with the handle pendulum has three positions. In the middle position 0, the driving gear Z_1 is not in contact with the middle two idler gears Z_3 and Z_4