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Abstract: Based on deeply analysis of inherent relations between the
extreme position angle and the link dimensions of type Ⅰ and type Ⅱ
crank-rocker mechanisms with quick return characteristics, the
geometrical conditions are put forward, by which we can judge whether
the extreme position angle of type Ⅰ crank-rocker mechanisms is less
than, equal to or lager than 90°. It is proved that the extreme position
angle of type Ⅱ crank-rocker mechanism is certainly less than 90°. The
relations between the extreme position angle and the angular stroke of
the rocker are brought to light, which should be satisfied during the
kinematic design of crank-rocker mechanisms. For the first time, the
study results are synthesized as five theorems. Several examples are
given to show the correctness and applications of these theorems.
Key words: Crank-rocker mechanism Extreme position angle Angular stroke
of rocker Mechanism design
CLC No: TH112
Received
20040110, received in revised form 20050121
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