【20160322】The Four-Bar Mechanism. N$ i# t4 `4 o6 H3 L ]) {
6 @& f0 [( L8 `+ TThe 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.
( ~8 @0 b/ Q( L; P四杆机构极其常用，所以多作一点说明。
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& T6 W d1 T( H+ P9 a. Y; X7 TThe 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.7 @9 ?: {/ d, Y( _0 e/ X3 ?, T# K
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。
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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.
- V. G) k8 I* [7 d四杆机构自由度为1。
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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.
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6 l7 X: b* S" ?5 r5 i: o术语中英对照：
4 t9 t2 n! o& \6 ?, l3 n" P机架——frame e- ^ i. \! B9 _# q: ]
主动杆——input link
* [! F7 P- S. C1 ~9 o连杆——coupler / connecting arm9 F! I% v2 @8 f& F
从动杆——output link / follower
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楼主: 黑森林的鹿
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发表于 2016-3-23 03:01:16
