《機(jī)械原理》課件_第9章_凸輪機(jī)構(gòu)及其設(shè)計(jì)

1、JM 返回 5)5)JM 返回12刀架刀架o JM 返回 。JM 返回12刀架刀架o JM 返回r1r2r1+r2 =constWJM 返回 S=S(t)S=S(t)V= =V(t)(t)a= =a(t)(t)r0hBots010102020000ADCBJM 返回 s0vah+JM 返回 中間點(diǎn)：中間點(diǎn)：=0 0/2/2，s=h/2 1sva 235463h/20 0h/22h/2h/0 04h4h2 2/0 02 2JM 返回 s svah0 0JM 返回 123456av vs sh0123456Vmax=1.57h/0JM 返回s a=2=2hh2 2 sin(2/ sin(2/0 0

2、)/)/0 02 2 123456vah0 0r=h/2vmax=2h/0 0amax=6.28=6.28hh2 2/0 02 2 =2/=2/0 0JM 返回hvsaooo0 0+-vsahooo0 0JM 返回JM 返回JM 返回 1.0 1.0 （JM 返回1)1)2)2)3)3)4)4)5)5)6)6)7)7)JM 返回 - JM 返回Ar0609090120-s12345 67 891011121314 601209090135781 3 5 7 8911 13 159111312141876543214131211109JM 返回r0609090120-12345678910111

3、21314 As 601209090135781 3 5 7 8911 13 159111312141876543214131211109JM 返回 123456788765432191011121314151413121110 9s 601209090135781 3 5 7 8911 13M 返回eA A-O O s 601209090135781 3 5 7 8911 13 1591113121412345678k1k2k3k5k4k6k7k81514131211109k9k10k11k12k13k14k15123456781514131211109JM 返回

4、A1A2A3A4A5A6A7A8B1B2B3B4B5B6B7B812060 90 B11 1B22 2B33 3B44 4B55 5B66 6B77 7-r0ABld 60120909012341 2 3 45 67 85768JM 返回2RV=RvRV ，BvJM 返回123456787654321V=RV2Rs vRs s123456786543217JM 返回AR2” 3”4”5”6”7”8”9”0”0”- -V2 2R R2rr1”AV=RA5A6A7A8A9A2A3A4A1A0012345 6 7 8 9 02 2R RA0中線(xiàn)中線(xiàn)4,5,632 10879JM 返回yxB0yxs0

5、s x= y=x= (s0+s)sin + ecosy=(s0+s)cos- - esinetg= - -dx/dy =(dx/d)/(- - dy/d)=sin/cos(1)x - rrcos(x, y)rrnn(x,y)(x,y)s0er r0 0可得：可得： sin= ( dx/d) / ( dx/d)2+( dy/d)2 cos= - -( dy/d) / ( dx/d)2+( dy/d)2 - - rrr0y - rrsinnnJM 返回s0r0B0Ox-yOP= v/y=x=ds/ds0sP (r0+s)sin+(ds/d)cos(r0+s)cosds/d)sinv=(ds/dt)

6、/(d/dt=(ds/dt)/(d/dt) )= ds= ds/d/d (x, y)BJM 返回 x= asinl sin (+0 0 ) y= acosl cos (+0 0 )yxa x=x rrcosy=y rrsinasinacosl sin (+0 0 )0 xr0B0O-ylA0B0AJM 返回 1.2.3.4.JM 返回lbR2R1Fttnn1 12 22 2Bd-Fsin(+1 1 )+(R1R2 )cos2 2=0Q+Fcos(+1 1 ) (R1+R2 )sin2 2=0R2cos2 2 (l+b)R1cos2 2 b=0vQF=cos(+1 1 )(1+2b/l) sin

7、(+1 1 )tg2 2QJM 返回 ？nnvOr r0 0JM 返回220)/(estgeddsrds/dnnPeOCBvvr r0 0=(ds=(ds/d-e)/d-e)/ / (r(r0 02 2-e-e2 2) )1/21/2+s+ss0sDtgtg=ds=ds/d/d/ / (r(r0 0+s+stgtg=(OP-e)/BC=(OP-e)/BCJM 返回max凸輪轉(zhuǎn)角凸輪轉(zhuǎn)角0余弦加速度運(yùn)動(dòng)余弦加速度運(yùn)動(dòng)正弦加速度運(yùn)動(dòng)正弦加速度運(yùn)動(dòng)h/r0h/r0凸輪轉(zhuǎn)角凸輪轉(zhuǎn)角0等速運(yùn)動(dòng)等速運(yùn)動(dòng)等加等減速運(yùn)動(dòng)等加等減速運(yùn)動(dòng)h/r0h/r0maxJM 返回arr rr arr rr arr0rr arr0 arrrrarrrrJM 返回)/()(2322xyyxyx 2222/,/,/dydydxdxddyyddxx 和JM 返回123456788765432191011121314151413121110 9lmax lmax為推桿上點(diǎn)為推桿上點(diǎn)A至推至推桿平底與凸輪廓線(xiàn)的桿平底與凸輪廓線(xiàn)的切