Page 123 - Analysis and Design of Machine Elements
P. 123
Figure P4.4 Illustration for Detachable Fastenings for Shaft and Hub 101
Calculation Question 2.
1 2 3 4
S S
d
L
2
L 1
Design Problems
1 The main tasks in key design include:
(1) select the length of key according to the length of hub
(2) select the type of key according to their applications
(3) select the dimension of key cross section according to the diameter of mating shaft
(4) check the strength of key
The normal design procedure is _______.
(a) 2 → 1 → 3 → 4
(b) 2 → 3 → 1 → 4
(c) 1 → 3 → 2 → 4
(d) 3 → 4 → 2 → 1
2 A cast steel V-belt sheave installed at the end of a shaft by a key in Figure P4.5.
The sheave diameter and mating shaft diameter are d = 250 mm and d = 45 mm,
d
respectively. The width of hub is L = 65 mm. The belt drive works steadily. Decide
the type and dimension of key and the maximum torque the shaft can transmit.
B Figure P4.5 Illustration for Design Problem 2.
d d
d
L
