Kinematic analysis part 2, mechanism design

1.6 - KINEMATIC ANALYSIS
Kinematic analysis part 2, mechanism design

1. Transmission angle Measures the quality of the force transmitted Should be between 45° and 135°

2. Transmission angle

3. Objectives

4. Velocity analysis Offset crank slider L2 L3 θ 2 L4 L1 x-axis O2 θ 3 α , ω 3 , v 4 , ω 2 B C SEE RELATIVE VELOCITIES METHOD EXAMPLE

5. Velocity analysis Fourbar linkage , ω 3 , ω 2 L1 L2 L3 θ 2 A x-axis y-axis D B C L4 θ 3 γ θ 4 , ω 4 SEE RELATIVE VELOCITIES METHOD EXAMPLE

6. MECHANICAL ADVANTAGE MECHANICAL ADVANTAGE

7. Slider crank – acceleration analysis ω 2 α 2 ω 3 α 3 a 4 v 4

8. Slider crank – acceleration analysis a 4 ω 2 α 2 ω 3 α 3 a 4 v 4

9. Four-bar linkage acceleration analysis ω 2 α 2 ω 3 ω 4 α 3 α 4

10. Four-bar linkage acceleration analysis ω 2 α 2 ω 3 ω 4 α 3 α 4

11. Example : 4-bar relative velocities and acceleration method

12. Example : 4-bar relative velocities and acceleration method

13. Example : 4-bar relative velocities and acceleration method

14. Example : 4-bar relative velocities and acceleration method

15. Class participation (30 mins ) A E B D 14” 3” 17” 17” 12” 8” ω 2=20rad/s constant Consider α AB =0 Using the equations , find α BD and α DE