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PROBLEM 6.133
The Whitworth mechanism shown is used to produce a quick-return
motion of Point D. The block at B is pinned to the crank AB and is free to
slide in a slot cut in member CD. Determine the couple M that must be
applied to the crank AB to hold the mechanism in equilibrium when
(a) α 0, (b) α 30°.
PROBLEM 6.133 (Continued)
PROBLEM 6.134
Solve Problem 6.133 when (a) α 60, (b) α 90.
PROBLEM 6.133 The Whitworth mechanism shown is used to produce
a quick-return motion of Point D. The block at B is pinned to the crank
AB and is free to slide in a slot cut in member CD. Determine the couple
M that must be applied to the crank AB to hold the mechanism in
equilibrium when (a) α 0, (b) α 30°.
PROBLEM 6.134 (Continued)
PROBLEM 6.135
Two rods are connected by a frictionless collar B. Knowing that the magnitude
of the couple
MA
is 500 lb · in., determine (a) the couple
MC
required for
equilibrium, (b) the corresponding components of the reaction at C.
PROBLEM 6.136
Two rods are connected by a frictionless collar B. Knowing that the
magnitude of the couple
MA
is 500 lb · in., determine (a) the couple
MC
required for equilibrium, (b) the corresponding components of the reaction
at C.
y
PROBLEM 6.137
Rod CD is attached to the collar D and passes through a collar
welded to end B of lever AB. Neglecting the effect of friction,
determine the couple
M
required to hold the system in equilibrium
when
30 .
PROBLEM 6.138
Rod CD is attached to the collar D and passes through a
collar welded to end B of lever AB. Neglecting the effect
of friction, determine the couple
M
required to hold the
system in equilibrium when
30 .
PROBLEM 6.139
Two hydraulic cylinders control the position
of the robotic arm ABC. Knowing that in the
position shown the cylinders are parallel,
determine the force exerted by each cylinder
when
160 NP
and
80 N.Q
PROBLEM 6.140
Two hydraulic cylinders control the position of the robotic arm ABC. In the position shown, the cylinders
are parallel and both are in tension. Knowing the
600 N
AE
F
and
50 N,
DG
F
determine the forces
P
and
Q
applied at C to arm ABC.
