Assembly Drawings 267
dharm
d:\N-Design\Des18-1.pm5
160
1:25
R30
f 32
32 24 R5 R5
f 50
R5
12
f^62 f
50
f
25
7
R5
R10
70 22
1
f^20405090100
100
f 25
6
R6^45
f 50
76
50
6 R6
10
f 50
4
f 25
R25
f 32
(^100) (200)
R25
f 25
3
1:25
f25.2
92
f
20.2
7
2 33 24
7
25
R23
90
1:25
5
Part No. Name Matl Qty
1
2
3
4
5
Block
Piston rod
Gudgeon pin
Slide block
Cotter
CS
MS
MS
Cl
MS
1
1
1
2
1
Parts list
Fig. 18.2 Steam engine crosshead
It consists of strap 3 which connects both the square end of the connecting rod 1 and
the brasses 2. The strap is fastened to the rod by jib 4 and cotter 5. Finally, the cotter is
locked in position by the set-screw 6. Figure 19.3 shows the assembly drawing of a steam
engine connecting rod end.
Exercise
The components of a steam engine connecting rod end are shown in Fig. 18.4. Assemble the parts
and draw, (i) half sectional view from the front, with top half in section and (ii) view from above.
18.2.5 Marine Engine Connecting Rod End
Marine engines are used to produce high power and as such all the parts of the engine are sturdy
and strong. The part drawings of a marine engine connecting rod end are shown in Fig. 18.5.
It consists of two halves of the bearing brasses 3, which are placed around the crank pin.
The cover end 2 and the rod end 1 are placed in position and fastened by means of bolts 4 and nuts
5, after placing the leather packing 8 in-between the bearing brasses. Snug 7 in the bolts, prevents
rotation of the bolts while they are tightened with the nuts. Split cotters 6 are used to prevent the
loosening tendency of the nuts. Figure 19.2 shows the assembly drawing.
