BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI

38 Radu Ibănescu and Cătălin Ungureanu
q= a− ecos φ.
(5)
The elastic force has the value 10 N when the cam follower is at the
lowest position, when is the angle φ is 3 π . For this reason, the elastic force is
2
NC
F = 10 + k (1 + sin φ)
. (6)
e
e
The normal forces at the points A, B and C are denoted N , N and
A B
F fC
and the friction force at the same points are denoted F , F and .
The disk is represented in Fig. 3.
y
fA
fB
F r fC
V r
N r C
R
H r
M m
M f O
ϕ(t)
G
x
Fig. 3 – The disk.
The reaction forces at the joint
moment at the joint O is
M rμ H V
O are denoted H and V. The friction
2 2
f
=
1
+ , (7)
where r is the radius of the shaft.
The three equilibrium equations for the disk are:
− H + = 0 , (8)
FfC
V − G − N = 0 , (9)
C
M − M −N ecosφ −Gecos φ − F ( R+ esin φ) = 0 .
(10)
m f C fC