Linkages: Specific Types of Links

1
Linkages Specific Types of Links

• Ground
• Crank
• Rocker
• Slider
• Coupler

2
Linkages Analysis

• Fourbar Linkages
• Inversions
• Grashof Condition
• S
• L
• P,Q

3
Linkages Class 1

• Class 1 (Grashof) S L lt P Q
• At least one link completes a full revolution.
• Inversions
• Crank-rocker
• Double-crank
• Double-rocker

4
Linkages Class 2

• Class 2 (Non-Grashof) S L gt P Q
• No link completes a full revolution.
• Inversions
• Triple-rocker

5
Linkages Class 3

• Class 3 (Special Case) S L P Q
• At least one link completes a full revolution.
• Inversions
• Double-crank
• Crank-rocker
• Caution

6
Linkages Grashof Condition

• Example

7
Linkages Grashof Condition

• Example

8
Linkages Design Considerations

• Toggle Positions