108 The Bennett linkage
.
(5.87b)
Consider Eqs (5.85), (5.86) and (5.87) together, it can be found that
,
(5.88a)
.
(5.88b)
The relationship among λ, ω and L/l, c/l, d/l can be obtained as follows.
First, substitute Eq. (5.88) into Eq. (5.65). There is
.
(5.89)
When the expended configuration of the alternative form is square, i.e.
,
Eq. (5.89) gives
,
Figure 5.19 The alternative form of Bennett linkage with square cross-section
bars in folded configuration.