Chap.8 Combined Mechanisms
Chap.8.1 Classification
Chap.8.2 Application
Investigate and Review by Students
Chap.8.1 Classification
Named by the sub-mechanisms
Named by the patterns of transmission
route,
Series Combined Mechanisms
Mechanism Ⅰ
(link 1,2,5)
Mechanism Ⅱ
(link 2,3,5)
input output
Output motions of one basic mechanism is the
input motion of the next basic mechanism,
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Parallel Combined Mechanisms
input output
Mechanism Ⅰ
(link 2,3,4,10)
Mechanism Ⅱ
(link 6,7,8,10)
Mechanism Ⅲ
(link 4,5,9,8,10)
The n Output motions of the
n single DOF basic
mechanism are input
simultaneously to a basic
mechanism with n DOF and
then combined to produce an
output,
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9
Feedback Combined Mechanisms
input output Mechanism Ⅰ
(link 1,2,4)
MechanismⅡ
(link 2’,3,4)
A differential mechanisms
has two DOF,
In some differential
mechanism,one of the inputs
comes from the driver
directly,The other input is
the feedback from the output
of the differential mechanism
through the single DOF
mechanism,
4
Mixed Combined Mechanisms
A mechanism system formed through
more than one combination pattern is
called mixed combined mechanism,
自由度大于 1的差动机构称为 组合机构的基础机构 ；
自由度为 1的基本机构称为 组合机构的附加机构 。
所谓封闭式传动机构，是指用一个机构去约束或影
响另一个多自由度机构所形成的封闭式传动系统
Chap.8.2 Application
1,Complex path
2,Complex motion form
Homework
Analyze the combining form