推 heatsink: 901 你已經把圖畫出來了，以支點作力矩，F力臂就是30mm 03/27 20:22
→ heatsink: N逆時針，F逆時針，P順時針 03/27 20:24
推 heatsink: 688先求出輪系值e=1/16,代表主動輪轉1圈,從動輪轉1/16圈 03/27 20:28
→ ca44512: 我是想問如何判斷f是正轉還逆轉 N和P的放想我會判斷 03/27 20:35
→ heatsink: 從動輪1/16圈=3.14x320x1/16=62.8(cm) 03/27 20:44
→ heatsink: 抱歉,不大懂意思,你說的f是指滾輪轉向還是摩擦力方向? 03/27 20:47
推 heatsink: 698 用V=pixDxN ==> Va=3.14xDaxNa , Vb=3.14xDbxNb 03/27 20:50
推 heatsink: 645 (Nr-Na)/(Ns-Na)=-(72/108),Nr,Na為已知,Ns即為解 03/27 21:01
→ heatsink: 式子右側的負號代表轉向與主動輪Ns相反 03/27 21:02
→ heatsink: 抱歉...我打反了，上面更正一下：Ns,Na為已知，Nr為解 03/27 21:04
推 heatsink: 626 它的圖畫錯了；A與B嚙合，C與D嚙合，才能得到正解 03/27 21:15
推 heatsink: 559 主動軸轉速平方=從動輪N3的平方=N1xN5 03/27 21:20
→ heatsink: 200^2=100xN1=N3^2 , 求得N1=400rpm , N3=200rpm 03/27 21:22
→ ca44512: 我畫的自由體圖中的f對圓點 是正轉還是逆轉 03/27 21:30
→ hideho: 順或逆,看得懂嗎?當初也為了這種題目研究許久 03/27 21:38
→ hideho: 若支點在f=μN這條線之下,鼓輪順時針反而會跟N力相反 03/27 21:47