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Design and Analysis of Mechanisms
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Table of Contents

Preface viii

1 Introduction to Mechanisms 1

1.1 Introduction 1

1.2 Kinematic Diagrams 2

1.3 Degrees of Freedom or Mobility 5

1.4 Grashof's Equation 7

1.5 Transmission Angle 7

1.6 Geneva Mechanism 10

Problems 12

Reference 15

2 Position Analysis of Planar Linkages 16

2.1 Introduction 16

2.2 Graphical Position Analysis 17

2.2.1 Graphical Position Analysis for a 4-Bar 17

2.2.2 Graphical Position Analysis for a Slider-Crank Linkage 19

2.3 Vector Loop Position Analysis 20

2.3.1 What Is a Vector? 20

2.3.2 Finding Vector Components of M 21

2.3.3 Position Analysis of 4-Bar Linkage 23

2.3.4 Position Analysis of Slider-Crank Linkage 36

2.3.5 Position Analysis of 6-Bar Linkage 47

Problems 49

Programming Exercises 63

3 Graphical Design of Planar Linkages 66

3.1 Introduction 66

3.2 Two-Position Synthesis for a Four-Bar Linkage 67

3.3 Two-Position Synthesis for a Quick Return 4-Bar Linkage 69

3.4 Two-Positions for Coupler Link 72

3.5 Three Positions of the Coupler Link 72

3.6 Coupler Point Goes Through Three Points 75

3.7 Coupler Point Goes Through Three Points with Fixed Pivots and Timing 78

3.8 Two-Position Synthesis of Slider-Crank Mechanism 82

3.9 Designing a Crank-Shaper Mechanism 84

Problems 88

4 Analytical Linkage Synthesis 95

4.1 Introduction 95

4.2 Chebyshev Spacing 95

4.3 Function Generation Using a 4-Bar Linkage 98

4.4 Three-Point Matching Method for 4-Bar Linkage 100

4.5 Design a 4-Bar Linkage for Body Guidance 103

4.6 Function Generation for Slider-Crank Mechanisms 106

4.7 Three-Point Matching Method for Slider-Crank Mechanism 108

Problems 112

Further Reading 114

5 Velocity Analysis 115

5.1 Introduction 115

5.2 Relative Velocity Method 116

5.3 Instant Center Method 123

5.4 Vector Method 137

Problems 146

Programming Exercises 156

6 Acceleration 159

6.1 Introduction 159

6.2 Relative Acceleration 160

6.3 Slider-Crank Mechanism with Horizontal Motion 161

6.4 Acceleration of Mass Centers for Slider-Crank Mechanism 164

6.5 Four-bar Linkage 165

6.6 Acceleration of Mass Centers for 4-bar Linkage 170

6.7 Coriolis Acceleration 171

Problems 176

Programming Exercises 184

7 Static Force Analysis 187

7.1 Introduction 187

7.2 Forces, Moments, and Free Body Diagrams 188

7.3 Multiforce Members 192

7.4 Moment Calculations Simplified 198

Problems 199

Programming Exercises 204

8 Dynamic Force Analysis 207

8.1 Introduction 207

8.2 Link Rotating about Fixed Pivot Dynamic Force Analysis 209

8.3 Double-Slider Mechanism Dynamic Force Analysis 211

Problems 214

9 Spur Gears 219

9.1 Introduction 219

9.2 Other Types of Gears 219

9.3 Fundamental Law of Gearing 220

9.4 Nomenclature 223

9.5 Tooth System 225

9.6 Meshing Gears 226

9.6.1 Operating Pressure Angle 227

9.6.2 Contact Ratio 227

9.7 Noninterference of Gear Teeth 228

9.8 Gear Racks 231

9.9 Gear Trains 232

9.9.1 Simple Gear Train 233

9.9.2 Compound Gear Train 233

9.9.3 Inverted Compound Gear Train 236

9.9.4 Kinetic Energy of a Gear 238

9.10 Planetary Gear Systems 240

9.10.1 Differential 242

9.10.2 Clutch 243

9.10.3 Transmission 243

9.10.4 Formula Method 245

9.10.5 Table Method 248

Problems 249

10 Planar Cams and Cam Followers 255

10.1 Introduction 255

10.2 Follower Displacement Diagrams 257

10.3 Harmonic Motion 259

10.4 Cycloidal Motion 260

10.5 5-4-3 Polynomial Motion 262

10.6 Fifth-Order Polynomial Motion 263

10.7 Cam with In-Line Translating Knife-Edge Follower 265

10.8 Cam with In-Line Translating Roller Follower 266

10.9 Cam with Offset Translating Roller Follower 272

10.10 Cam with Translating Flat-Face Follower 273

Problems 277

Appendix A: Engineering Equation Solver 279

Appendix B: MATLAB 296

Further Reading 306

Index 307

About the Author

Michael J. Rider, Professor of Mechanical Engineering, Ohio Northern University, USA. Professor Rider earned a Masters in machine design at Texas A&M and a Ph.D. in computer aided-design and computer graphics at Purdue University. Professor Rider has been teaching at Ohio Northern University for the past 35 years.

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