内容简介
CHAPTER 1 Mechanisms and Machines:Basic Concepts
1.1 Introduction
1.2 Tools Available to the Designer of Linkages and Other Mechanisms
Hints for Effective Computer Use
Identifying a Need or a Problem
1.3 Systems of Units
Conversion Factors
1.4 Terminology and Definitions
Link
Frame
Joint or Kinematic Pair
Lower and Higher Pairs
Closed-Loop Kinematic Chains
Open-Loop Kinematic Chains
Manipulators
Robots
Linkage
Planar Motion and Planar Linkages
Spatial Morion and Spatial Linkages
Inversion
Cycle and Period
1.5 Degrees of Freedom(Mobility)
Constraints Due to Joints
Planar Linkages
Determination of Degrees of Freedom for a Planar Linkage
One-Degree-of-Freedom Configurations
1.6 Classification of Closed Planar Four-Bar Linkages:The Grashof Criterion
1.7 Transmission Angle
1.8 Limiting Positions of Slider-Crank Linkages
In-Line Slider-Crank Mechanisms
Offset Slider-Crank Mechanisms
1.9 Quick-Return Mechanisms
1.10 Linkage Interference
1.11 Mechanisms for Specific Applications
Slider-Crank Mechanism
Fluid Links
Gear Trains
Power Screws
Differential Screws
One-Way Clutches
Universal Joints
Automotive Steering Linkage
Computer-Controlled Industrial Robots
1.12 Computer-Aided Linkage Design
Research in Engineering Design Theory and Methodology
1.13 Mechanism Design Considerations
Problems
Bibliography and References
CHAPTER 2 Motion in Machinery:Positional Analysis of Planar Mechanisms
2.1 Motion
Examples of Rectilinear Morion:The Eccentric Cam and the Scotch Yoke
2.2 Vectors
Unit Vectors
Vector Components
2.3 Complex Numbers
Rectangular Form
Polar Form
Complex Arithmetic—Addition
Multiplication,Division,and Differentiation
2.4 Complex-Number Methods Applied to the Displacement Analysis of Linkages
Limiting Positions
Multiloop Linkages
Problems
Bibliography and References
CHAPTER 3 Velocity Analysis of Mechanisms
3.1 Basic Concepts
Velocity of a Point
Angular Velocity
Parameter Studies
3.2 Moving Coordinate Systems and Relative Velocity
Relative Velocity from Another Viewpoint
3.3 Complex-Number Methods Applied to Velocity Analysis
3.4 Graphical Analysis of Linkage Motion Utilizing Relative Velocity
Analyzing Motion of the In-Line Slider-Crank Mechanism
3.5 The Velocity Polygon
Velocity Image
3.6 Graphical Analysis of Basic Linkages
The Four-Bar Linkage
Analyzing Sliding Contact Linkages
Comparison of Results with an Analytical Solution
3.7 Analyzing Combinations of Basic Linkages
Toggle Linkage
Beam Pump
3.8 Centros
Kennedy's Theorem
Centros of a Four-Bar Linkage
Analyzing a Slider-Crank Mechanism
Problems
Bibliography and References
CHAPTER 4 Acceleration Analysis of Mechanisms
4.1 Basic Concepts
Acceleration of a Point
Angular Acceleration
Moving Coordinate Systems
Relative Acceleration
4.2 Complex-Number Methods Applied to Acceleration Analysis
Solving the Complex Acceleration Equation
4.3 The Acceleration Polygon
Analysis of Slider-Crank Mechanisms
Comparison with an Analytical Solution
Acceleration Image
Graphical Analysis of the Four-Bar Linkage
4.4 Graphical Analysis of Sliding Contact Linkages
Coriolis Acceleration
Comparison of Results with an Analytical Solution
4.5 Analyzing Combinations of Basic Linkages
Problems
Bibliography and References
CHAPTER 5 Design and Analysis of Cam-and-Follower Systems
5.1 Introduction
Some Applications of Cam-and-Follower Systems
Terminology
Disk Cam Design and Manufacture
5.2 Graphical Cam design
5.3 Cam Design in Terms of Follower Motion
Possible Forms of Follower Displacement
Uniform Motion
Parabolic Motion
Harmonic Motion
Follower Return
Problems with Harmonic and Parabolic Motion
Follower Motion for High-Speed Cams
5.4 Cycloidal Cams
Polynomial Motion
5.5 Design of Good High-Speed Polynomial Cams
5.6 Analytical Cam Design Based on the Theory of Envelopes
Theory of Envelopes
Disk Cam with Translating Flat-Faced Follower
Disk Cam with Translating Offset Roller Follower
Pressure Angle
Disk Cam with Rotating Flat-Faced Follower
Disk Cam with Rotating Roller Follower
Cam Curvature
Translating Flat-Faced Follower
Translating Roller Follower
5.7 Positive-Motion Cams
Face Cam
Constant-Breadth Cams
Conjugate Cams
Cylindrical Cams
Problems
Bibliography and References
CHAPTER 6 Spur Gears:Design and Analysis
6.1 Gear Types
6.2 Spur Gear Terminology
Backlash
6.3 Fundamental Law of Gearing
Conjugate Action and the Involute Curve
The Base Circle
The Line of Action
The Pressure Angle
Contact Length
Contact Ratio
6.4 Internal Gears
6.5 Standard Gears
6.6 Gear Manufacture
6.7 Sliding Action of Gear Teeth
6.8 Interference
Undercutting
Stub Teeth
Problems
Bibliography and References
CHAPTER 7 Helical,Worm,and Bevel Gears:Design and Analysis
7.1 Helical Gears on Parallel Shafts
Helical Gear Tooth Contact
Helical Gear Terminology and Geometry
Normal Pitch and Normal Module
Pressure Angle
Center Distance
Face Width
Axial Pitch
Contact Ratio and Axial Contact Ratio(Axial Overlap)
Velocity Ratio of Helical Gears on Parallel Shafts
Helical Gear Forces
Eliminating Thrust with Herringbone Gears
7.2 Crossed Helical Gears
Crossed Helical Gear Geometry
Center Distance
Velocity Ratio of Crossed Helical Gears
7.3 Worm Gears
Worm Gear Terminology and Geometry
Velocity Ratio of Worm Gear Sets with Perpendicular Shafts
7.4 Bevel Gears
Bevel Gear Terminology and Geometry
Velocity Ratio of Bevel Gears
Other Types of Bevel Gears
Problems
Bibliography and References
CHAPTER 8 Drive Trains:Design and Analysis
8.1 Introduction
8.2 Velocity Ratios for Spur and Helical Gear Trains
Spur Gear Trains
Helical Gear Trains
Worm Drives
Idlers
Reversing Direction
Double Reductions
8.3 Planetary Gear Trains
Formula Method(Train Value Formulation Method)for Solving Planetary Trains
Input and Output Shafts
Tabular Analysis(Superposition):An An Alternative Method for Analyzing of Planetary Trains
Compound Planetary Trains
Balanced Planetary Trains
Planetary Differential Drives
Tandem Planetary Trains
Planetary Trains with More than One Input
Differentials and Phase Shifters
8.4 Other Drive Train Elements
Chain Drives
Belt Drives
V Belt Drives
Flat Belts
Positive-Drive Belts
Flexible-Spline Drives
Problems
Bibliography and References
CHAPTER 9 Static-Force Analysis
9.1 Introduction
9.2 Graphical Force Analysis
Graphical Force Analysis of the Slider-Crank Mechanism
Graphical Foree Analysis of the Four-Bar Linkage
9.3 Analytical Statics
Static-Equilibrium Equations
Analytical Solution for the Four-Bar Linkage
9.4 Friction in Mechanisms
Graphical Solution for a Slider-Crank Mechanism Including Friction
Problems
Bibliography and References
CHAPTER 10 Dynamic-Force Analysis
10.1 Introduction
10.2 D'Alembert'S Principle and Inertial Forces
Equivalent Offset Inertial Force
10.3 Dynamic Analysis of the Four-Bar Linkage
10.4 Dynamic Analysis of the Slider-Crank Mechanism
Equivalent Inertia
Approximate Dynamic Analysis Equations
Dynamic-Force Analysis for an Assumed Motion of a Mechanism
Dynamic-Motion Analysis for an Assumed Input Torque
10.5 Balancing of Machinery
10.6 Balancing of Rigid Rotors
Static Balancing
Dynamic Balancing
10.7 Balancing of Reciprocating Machines
Single-Cylinder Machines
Problems
Bibliography and References
CHAPTER 11 Synthesis
11.1 Type Synthesis
11.2 Number Synthesis
11.3 Two-Position Synthesis
Graphical Solution
Computer Solution
Inaccessible Pivot Point
11.4 Three-Position Synthesis Using a Four-Bar Linkage
11.5 Design of a Function Generator:Dot-Product Method
Selection of Precision Points
11.6 Coupler Curves
Problems
Bibliography and References
Partial Answers to Selected Problems
Some Conversion Factors
教学支持说明