【菜鳥成長記】20歲后，我在機械的每一天

黑森林的鹿

【20160322】The Four-Bar Mechanism

+ c' j  w& d* `" fThe 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.
四桿機構極其常用，所以多作一點說明。
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9 R% |. u4 }# G9 VThe 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.
$ h/ y$ O; A4 z$ T四桿機構判定條件：四個構件組成、四個銷釘連接、其一不可動。
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- E* F- Y0 v& R9 w  k: ~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.
9 t9 u! l; B: u- D* E四桿機構自由度為1。
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  B/ i& G4 l) o; Q% x% B) k& ~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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  ?7 n) Y2 M; C- c. K術語中英對照：
7 c/ y1 p4 u6 n: ?機架——frame
主動桿——input link
& O) O9 x: Z$ t連桿——coupler / connecting arm
# V. a+ _3 o& u& U& r從動桿——output link / follower

xuexp

開學第一件事應該是轉專業

however1241

however1241 發表于 2016-3-22 09:03
* N1 K: P9 s6 J  ~9 {& t. z謝謝回復

4 X& m1 {0 W1 U! j% P共勉

@忘川

機械行業不好干，加油吧

daretobe

新手學習

黑森林的鹿

【20160323】Grashof 'sCriterion

3 I, V* Z4 O7 n1 EThe following nomenclature is used todescribe the length of the four links.
6 _4 e3 }$ X' @# BGrashof定理，用于描述四桿機構。

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& @' R" O7 q* z5 S  N; H0 ?  e  g/ XThe different categories are illustratedin Figure 1.34 and described in the following sections.
如圖為不同種類的四桿機構。


主要為：
雙曲柄機構（Double Crank）
8 a: a0 a. S1 N& ^5 Y( s- N曲柄搖桿機構（Crank-Rocker）
' _  l! n( l: Q" k' l" N2 t# J" r雙搖桿機構（Double Rocker）
6 w& C) O+ g3 D( r平移機構（這怎翻譯）（Change PointMechanism）
三搖桿機構（Triple Rocker）
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黑森林的鹿

xuexp 發表于 2016-3-23 03:01
7 d3 V3 P' a' i7 X, B8 g' I開學第一件事應該是轉專業

這……為何如此不看好呢
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黑森林的鹿

@忘川 發表于 2016-3-23 09:54
% w2 Z& H. T( b: N( R* h4 y機械行業不好干，加油吧

. P) M" z- s0 y7 C4 H恩恩，已有心理準備，會好好加油的，謝謝關注與鼓勵！

黑森林的鹿

daretobe 發表于 2016-3-23 13:46
* l. P  t2 i1 W& o% v& v# V新手學習

+ n1 e4 _7 L3 P, v2 ?; ^' \1 {是的，新手入門階段，要學的很多很多！會好好加油的！

風雪關懷

樓主有志氣，佩服佩服，加油