【20160322】The Four-Bar Mechanism
The simplest and most common linkage is the four-barlinkage. It is a combination offour links, one being designated as the frame and connected by four pin joints.Because it is encountered so often, further exploration is in order.
四杆机构极其常用，所以多作一点说明。
The mechanism for an automotive rear-window wiper system is shown in Figure1.33a. The kinematic diagram is shown in Figure 1.33b. Notice that this is afour-bar mechanism because it is comprised of four links connected byfour pin joints and one link is unable to move.
四杆机构判定条件：四个构件组成、四个销钉连接、其一不可动。
Because the four-bar mechanism has onedegree of freedom, it is constrained or fullyoperated with one driver. The wiper system in Figure 1.33 is activated by asingle DC electric motor.
四杆机构自由度为1。
Of course, the link that is unable to move is referred to as the frame. Typically, the pivoted link that is connected to the driver or power source is called the inputlink. The other pivoted link thatis attached to the frame is designated the outputlink or follower. The coupler or connecting arm “couples” the motion of the inputlink to the output link.
术语中英对照：
机架——frame
主动杆——input link
连杆——coupler / connecting arm
从动杆——output link / follower
开学第一件事应该是转专业
however1241 发表于 2016-3-22 09:03 static/image/common/back.gif
谢谢回复
共勉
机械行业不好干，加油吧
新手学习
【20160323】Grashof 'sCriterion
The following nomenclature is used todescribe the length of the four links.
Grashof定理，用于描述四杆机构。
The different categories are illustratedin Figure 1.34 and described in the following sections.
如图为不同种类的四杆机构。
主要为：
双曲柄机构（Double Crank）
曲柄摇杆机构（Crank-Rocker）
双摇杆机构（Double Rocker）
平移机构（这怎翻译）（Change PointMechanism）
三摇杆机构（Triple Rocker）
xuexp 发表于 2016-3-23 03:01 static/image/common/back.gif
开学第一件事应该是转专业
这……为何如此不看好呢
@忘川 发表于 2016-3-23 09:54 static/image/common/back.gif
机械行业不好干，加油吧
恩恩，已有心理准备，会好好加油的，谢谢关注与鼓励！
daretobe 发表于 2016-3-23 13:46 static/image/common/back.gif
新手学习
是的，新手入门阶段，要学的很多很多！会好好加油的！
楼主有志气，佩服佩服，加油