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Appendix B

Task № 15
Rock breaker mechanism

Input data
Variables Variants
designa-
tion 1 2 3 4 5 6 7 8 9 10
а, m 0,400 0,320 0,345 0,365 0,375 0,400 0,300 0,345 0,250 0,375
b, m 0,350 0,250 0,280 0,300 0,000 0,050 0,400 0,290 0,450 0,330
с, m 0,225 0,245 0,100 0,195 0,000 0,325 0,400 0,000 0,085 0,205
d, m 0,325 0,150 0,345 0,295 0,525 0,225 0,000 0,435 0,425 0,320
l , m 0,061 0,060 0,065 0,075 0,080 0,050 0,070 0,105 0,090 0,078
OA
l , m 0,550 0,420 0,435 0,390 0,730 0,350 0,500 0,640 0,660 0,310
AB
l CB  l CD 0,470 0,300 0,250 0,335 0,350 0,200 0,280 0,325 0,260 0,350
l , m 0,335 0,400 0,450 0,430 0,375 0,425 0,360 0,420 0,300 0,360
DЕ
l , m 0,640 0,600 0,650 0,750 0,850 0,800 0,700 0,650 0,825 0,750
FE
 , град 40 45 90 80 105 95 0 45 70 60
n ,rpm 200 210 190 150 110 100 80 70 60 125
1
G 5 , N 300 350 370 400 425 440 450 500 550 420
М О , Nm 40 60 70 80 90 110 100 120 150 100
2
J O , kgm 25 32 34 34 43 42 37 45 55 62
Center of masses for link 3 is placed on the cross point of medians. Masses of
simple links is determined by the formula - m  10 l  . J O – equivalent
kg
i i
mass moment of inertia for group of links that were joined to crank with
constant transmission ratio.

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