机械设计基础第四版黄华梁课后答案1-3章.pdf

1- 61- 2035 1 1- 20 B1 C 2 A F5 4 1- 6 D E 3 01 F = 3 n2 PlPh= 342511 = 1 E A B 1 A B 1 2 3 C 4 3 2 C F = 3 n2 PlPh = 3324 = 1 3 1- 91- 231- 28 F = 3n2 pLpH = 37210 =1 1- 23 1 4 3 2 6 7 5 8 8 n = 7 pL = 10 pH = 0 F = 3n2 pLpH = 37291 = 2 n = 7 pL = 9 pH = 1 F = 3n2 pLpH = 3324 = 1 1- 23 n = 3 pL = 4 pH = 0 n = 3 pL = 3 pH = 1 F = 3n2 pLpH = 33231 =2 n = 4 pL = 5 pH = 1 n = 5 pL = 7 pH = 0 F = 3n2 pLpH = 3527 = 1 2 2- 2 K=1 =0A D A 2- 5 K=1 A C A B D 15 30 35 25 lmin+lmxa=15+35=50 30+25=55 2. l= 0.625 50 30+25= AD 25 B1 C1 C2 35 30 954.73787.2174.95 35252 15303525 arccos 35252 30153525 arccos 2 arccos 2 arccos 2 22 2 22 2 22 2 22 max cd abcd cd bacd ADADADAD 25 ADAD a 36.15)9643. 0arccos( 35302 )1525(3530 arccos 2 )( arccos 222 222 1 bc adcb AD 25 C“ B15 B“ 30 35 C 522.75)25. 0arccos( 35302 )1525(3530 arccos 2 )( arccos 222 222 bc adcb AB 2- 8 2- 34a=150 mmb=400 mme=50 mmHK B1 C1 B2 C2 B A C H e 1. mm mm 10 l 2.,H mm83029524472547 5015040050150400 2222 2222 . eabeabH B A A , 2 B1 C1 B2 C2 B A C H e 3. K 1) 180 180 K 35.699386.0arccos 1504001504002 8.302150400150400 arccos 2 arccos 2 22 2 22 abab Habab 0731 356180 356180 180 180 . . . K2) K: aH 4. min AB A B C B1 C1 B2 C2 B A C H e B A C B C D 603090 400 50150 arcsin90 arcsin90 90 min b ea DCB min : B B e 2- 9. k=1.5,H=50mm,e=20mm,lABlBC O A c1 c2 AB=(AC1- AC2)/2 BC=AC1- AB H 2 a A B 1 3 4 C b 90 lAB= lAB, lBC=lBC 1800K- 1/K+1=360 C1C2=H=50mm; C2C1O=900- =540 C1C2O=900- =540 O 90 2- 11K=1.2 CDl300mm35l80 mm 1416 121 121 180 1 1 180. . . K K 2 CDl300mm 35 DC1DC2 mm mm l 10 (): D C1C2 K 180 300mm m n 73.6 73.6 A B1 B2 3.C1C2 C1C2O=C2C1O =900- 16.4=73.6 4. OOC C1C2 A 5. l l = 280/10=16mm A A W D C1C2 B1 m n A B1 B2 W D C1C2 B1 5 . mm305233810 2 1 2 1 21 ACACl lBc mm3003010ADl lAD 6 . min A B1 B2 D C1C2 45 min B C B“ C“ 82 B C B“ C“ min min= min 4582= 45 50 A B1 B2 D C1C2 mm42.1802/35sin2 21cd lcc (): )(2 )()( cos 2 21 22 abbcabbc abbcabbc llll ccllll 416 121 121 180 1 1 180. . . K K )80)(80(2 42.180)80()80( 98. 0 222 bcbc bcbc ll ll mm44.305 bc l AC2D 72.5 89.515 .72 2122 ACCDCB ACC llCC abbc 21 21 sin )( sin 61.20 21 ACC mm57.309cos)(2)( 22 22 DCBlllllll abbccdabbccdad AC1C2 ) c c 80 .180 (l 51.106 30044.3052 )8057.309(30044.305 arccos 2 )( arccos 222 222 max bc adcb 55.44 30044.3052 )8057.309(30044.305 arccos 2 )( arccos 222 222 min bc adcb min min max 50 2 ( bc )ad)( .305 3 (0 min 1 4 9 4 1 0 142356o t t 3- 10 1 2 s 1 2 02 2 1 tast=1,2,3, 2 9 , 2 4 , 2 1 000 2 aaa s h 1829 3 2 1 2 0 10 2 0 ha s h aa h t 1 2 3 1 2 3 1 1 2 3 o S 2 90 120