问曲柄连杆机构能否实现直线运动

当然能了，当曲柄摇杆机构的摇杆的半径为无限长(像地球的半径一样长)的时候，那么摇杆的运动轨迹就是一条直线（水平线就是一条直线）。曲柄滑块机构就是它的一种演变形式。

'新建窗体，添加command1,label1,hscroll1,timer1,picture1const pi = 3.1415926dim angle as integerprivate sub form_load() '调整空间尺寸，位置及初始参数 me.scalemode = 3 me.caption = "曲柄滑块机构的演示" me.width = 5000 me.height = 3500 picture1.scalemode = 3 picture1.autoredraw = true picture1.move 0, 0, me.scalewidth, 150 command1.caption = "开始(&b)" command1.move 20, 160, 70, 30 label1.caption = "速度：" label1.move 120, 170, 100, 30 hscroll1.min = 1 hscroll1.max = 20 hscroll1.move 160, 160, 140, 30 timer1.interval = 20 timer1.enabled = falseend subprivate sub command1_click() timer1.enabled = not timer1.enabled if timer1.enabled then command1.caption = "暂停(&s)" else command1.caption = "开始(&b)" end ifend subsub draw(byval ox as integer, byval oy as integer, byval orad as integer) 'ox,oy圆心坐标,orad半径 angle = (angle + hscroll1.value) mod 360 xo = ox + orad * cos(angle * pi / 180) '圆周上的铰链点坐标(xo,yo) yo = oy + orad * sin(angle * pi / 180) xs = sqr((4 * orad) ^ 2 - 10 ^ 2) + xo '滑块的左边界x坐标，连杆长度取4*orad,滑块高度取20(像素) picture1.backcolor = picture1.backcolor picture1.drawstyle = 0 '实线 picture1.drawwidth = 2 '线宽2 picture1.line (ox + 2 * orad, oy)-(ox + 6 * orad, oy) '壁面 picture1.line (ox, oy)-(xo, yo) '连接圆心与圆周上的铰链点 picture1.line (xs, oy - 10)-(xo, yo), vbblue '连接滑块与圆周上的铰链点 picture1.fillstyle = 1 '透明填充 picture1.circle (ox, oy), orad '画圆 picture1.fillstyle = 0 '实体填充 picture1.fillcolor = vbwhite '圆心 picture1.circle (ox, oy), 5 picture1.fillcolor = vbgreen '圆周上的铰链点 picture1.circle (xo, yo), 4 picture1.fillcolor = vbred '滑块 picture1.line (xs, oy - 20)-(xs + 30, oy), , b picture1.drawstyle = 2 '虚线 picture1.drawwidth = 1 '线宽1 for i = 0 to 9 '表示壁面的虚线 picture1.line (i * 4 * orad / 10 + ox + 2 * orad, oy)-(i * 4 * orad / 10 + ox + 2 * orad + 20, oy + 20) nextend subprivate sub timer1_timer() '画 draw 60, 60, 40end sub

当然能了，汽缸作的就是直线运动。只要你给它设定一个轨迹就行了。

能

可以呀,曲柄连杆滑块机构嘛,滑块部分不就是直线运动吗?典型的曲柄滑块机构就是柴油机里的活塞连杆曲柄嘛,活塞不就是做直线运动吗?