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Gears and gear drives / Damir Jelaska

Author
Jelaska, Damir
Published
Chichester, West Sussex ; Hoboken : John Wiley & Sons, 2012.
Physical Description
xvi, 444 pages, 8 unnumbered pages of plates : illustrations ; 26 cm

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Contents
Machine generated contents note: 1.Introduction -- 1.1.Power Transmissions and Mechanical Drives -- 1.2.Classification of Mechanical Drives -- 1.3.Choosing a Mechanical Drive -- 1.4.Multi-Step Drives -- 1.5.Features and Classification of Gear Drives -- 1.5.1.Features of Gear Drives -- 1.5.2.Classification of Gear Drives -- 1.6.List of Symbols -- 1.6.1.Subscripts to Symbols -- 2.Geometry of Cylindrical Gears -- 2.1.Fundamentals of the Theory of Toothing -- 2.1.1.Centrodes, Roulettes and Axodes -- 2.1.2.Envelopes, Evolutes and Involutes -- 2.1.3.Cycloid and Involute of a Circle -- 2.1.5.1.Cycloid -- 2.1.5.2.Involute of Circle -- 2.1.4.Main Rule of Toothing -- 2.1.4.1.Analytical Determining of Mated Profiles -- 2.1.4.2.Radii of Curvature of Mated Profiles -- 2.2.Geometry of Pairs of Spur Gears -- 2.2.1.Cycloid Toothing -- 2.2.2.Involute Toothing -- 2.3.Involute Teeth and Involute Gears -- 2.4.Basic Tooth Rack -- 2.5.Fundamentals of Cylindrical Gears Manufacture -- 2.5.1.Generating Methods -- 2.5.2.Forming Methods -- 2.5.3.Gear Finishing -- 2.5.4.Basic Rack-Type and Pinion-Type Cutters -- 2.6.Cutting Process and Geometry of Gears Cut with Rack-Type Cutter -- 2.6.1.Profile Shift -- 2.6.2.Meshing of Rack Cutter with Work Piece, Basic Dimensions of Gear -- 2.6.3.Tooth Thickness at Arbitrary Circle -- 2.6.4.Tip Circle Diameter -- 2.6.5.Profile Boundary Point; Tooth Root Undercutting -- 2.6.6.Effect of Profile Shift on Tooth Geometry -- 2.6.7.Gear Control Measures -- 2.6.7.1.Chordal Tooth Thickness on the Arbitrary Circle -- 2.6.7.2.Constant Chord Tooth Thickness -- 2.6.7.3.Span Measurement -- 2.6.7.4.Dimension Over Balls -- 2.7.Parameters of a Gear Pair -- 2.7.1.Working Pressure Angle of a Gear Pair -- 2.7.2.Centre Distance -- 2.7.3.Gear Pairs With and Without Profile Shift -- 2.7.3.1.Gear Pairs Without Profile Shift -- 2.7.3.2.Gear Pairs with Profile Shift -- 2.7.4.Contact Ratio -- 2.7.5.Distinctive Points of Tooth Profile -- 2.7.6.Kinematic Parameters of Toothing -- 2.8.Basic Parameters of Gears Generated by the Fellows Method -- 2.8.1.Pinion-Type Cutter -- 2.8.2.Dimensions of Gears Cut by Pinion-Type Cutter -- 2.8.3.Undercutting the Tooth Root -- 2.8.4.Geometry of Internal Gear Toothing -- 2.9.Interferences in Generating Processes and Involute Gear Meshing -- 2.9.1.Interferences in Tooth Cutting -- 2.9.1.1.Tooth Root Undercutting -- 2.9.1.2.Overcutting the Tooth Addendum (First Order Interference) -- 2.9.1.3.Overcutting the Tooth Tip Corner (Second Order Interference) -- 2.9.1.4.Radial Interference (Third Order Interference) -- 2.9.1.5.Null Fillet -- 2.9.2.Interferences in Meshing the Gear Pair Teeth -- 2.9.2.1.Gear Root Interference -- 2.9.2.2.Interferences of Tooth Addendum -- 2.9.2.3.Radial Interference -- 2.10.Choosing Profile Shift Coefficients -- 2.10.1.Choosing Profile Shift Coefficients by Means of Block-Contour Diagrams -- 2.10.2.Choosing Profile Shift Coefficients by Means of Lines of Gear Pairs -- 2.11.Helical Gears -- 2.11.1.Basic Considerations -- 2.11.2.Helical Gear Dimensions and Parameters of a Gear Pair -- 2.11.3.Control Measures -- 2.11.4.Helical Gear Overlaps -- 2.11.4.1.Length of Contact Lines -- 2.12.Tooth Flank Modifications -- 2.12.1.Transverse Profile Modifications -- 2.12.1.1.Pre-Finish Flank Undercut -- 2.12.1.2.Tip Corner Chamfering and Tip Corner Rounding -- 2.12.1.3.Tooth Tip Relief -- 2.12.1.4.Tooth Root Relief -- 2.12.1.5.Tooth Tip Relief of the Gear Generated by Pinion-Type Cutter -- 2.12.1.6.Profile Crowning -- 2.12.2.Flank Line Modifications -- 2.12.2.1.Flank Line end Reliefs -- 2.12.2.2.Flank Line Slope Modification -- 2.12.2.3.Flank Line Crowning -- 2.12.3.Flank Twist -- 2.13.Geometry of Fillet Curve -- 2.13.7.Flank Curve Equation -- 2.13.2.Flank Curve Radius of Curvature -- 2.13.3.Geometry of Undercut Teeth -- 2.13.3.1.Profile Boundary Point -- 2.13.3.2.Contact Ratio of Gears with Undercut Teeth -- 2.14.Tolerances of Pairs of Cylindrical Gears -- 2.14.7.Control and Tolerances of Gear Body -- 2.14.2.Control and Tolerances of Teeth -- 2.14.2.1.Tooth Profile Control -- 2.14.2.2.Helix Deviations -- 2.14.2.3.Pitch Deviations -- 2.14.2.4.Radial Runout of Teeth -- 2.14.2.5.Tangential Composite Deviation -- 2.14.2.6.Tooth Thickness Tolerances -- 2.14.2.7.CNC Gear Measuring Centre -- 2.14.3.Control of Gear Pair Measuring Values -- 2.14.3.7.Systems of Gear Fits, Centre Distance Tolerances, Backlash -- 2.14.3.2.Contact Pattern Control -- 2.15.Gear Detail Drawing -- 2.16.List of Symbols -- 2.16.1.Subscripts to symbols -- 2.16.2.Combined Symbols -- 3.Integrity of Gears -- 3.1.Gear Loadings -- 3.7.1.Forces Acting on the Gear Tooth -- 3.7.2.Incremental Gear Loadings -- 3.2.Causes of Gear Damage -- 3.2.1.Gear Breakages -- 3.2.2.Active Tooth Flank Damage -- 3.3.Pitting Load Capacity -- 3.3.1.Contact Stresses -- 3.3.1.1.Nominal Value of Contact Stress -- 3.3.1.2.Real Value of Contact Stress -- 3.3.2.Allowable Contact Stresses -- 3.3.3.Dimensioning for Contact Stress -- 3.3.4.List of Symbols for Sections 3.1, 3.2 and 3.3 -- 3.3.4.1.Subscripts to Symbols -- 3.3.4.2.Combined Symbols -- 3.4.Tooth Root Load Capacity -- 3.4.1.Tooth Root Stress -- 3.4.2.Tooth Root Permitted Stress -- 3.4.3.Dimensioning for Tooth Root Stress -- 3.5.Gear Load Capacity at Variable Loading -- 3.6.List of Symbols for Sections 3.4 and 3.5 -- 3.6.1.Subscripts to Symbols -- 3.6.2.Combined Symbols -- 3.7.Scuffing Load Capacity -- 3.7.1.Safety Factor Against Scuffing for Flash Temperature Method -- 3.7.2.Force Distribution Factor Xr -- 3.7.3.Safety Factor Against Scuffing for Integral Temperature Method -- 3.8.Micro-Pitting Load Capacity -- 3.8.1.Elastohydrodynamic Lubricant Film Thickness -- 3.8.1.1.Calculation of Material Parameter GM -- 3.8.1.2.Calculation Speed Parameter UY -- 3.8.1.3.Load Parameter WY -- 3.8.1.4.Sliding Parameter SGF -- 3.8.2.Safety Factor Against Micro-pitting -- 3.9.List of Symbols for Sections 3.6 and 3.7 -- 3.9.1.Subscripts to Symbols -- 3.9.2.Combined Symbols -- 4.Elements of Cylindrical Gear Drive Design -- 4.1.Design Process -- 4.1.1.Design Procedure for a Gear Pair -- 4.1.2.Distribution of Gear Train Transmission Ratio -- 4.1.3.Gear Materials and Heat Treatment -- 4.1.3.1.Metallic Materials and their Heat Treatment -- 4.1.3.2.Sintered Materials -- 4.1.3.3.Polymer Materials -- 4.1.4.Gear Drive Design -- 4.1.4.1.Design of Housing -- 4.1.4.2.Vents -- 4.1.4.3.Lubricant Drain -- 4.1.4.4.Design of Bearing Locations -- 4.1.4.5.Design of Ribs -- 4.1.5.Design of Gears -- 4.2.Gear Drive Lubrication -- 4.2.1.Selection of Lubricant -- 4.2.2.Ways of Gear Lubrication -- 4.2.2.1.Bath Lubrication -- 4.2.2.2.Spray Lubrication -- 4.3.Power Losses and Temperature of Lubricant -- 4.3.1.Power Losses in Mesh -- 4.3.1.1.Power Losses in Mesh, Under Load, for a Single Gear Pair -- 4.3.1.2.Power Losses in Idle Motion -- 4.3.2.Power Losses in Bearings -- 4.3.2.1.Rolling Bearings -- 4.3.2.2.Sliding Bearings -- 4.3.3.Power Losses in Seals -- 4.3.4.Power Efficiency of Gear Drive -- 4.3.5.Temperature of Lubricant -- 4.4.List of Symbols -- 4.4.1.Subscripts to Symbols -- 4.4.2.Combined Symbols -- 5.Bevel Gears -- 5.1.Geometry and Manufacture of Bevel Gears -- 5.1.1.Theory of Bevel Gear Genesis -- 5.1.2.Types and Features of Bevel Gears -- 5.1.3.Application of Bevel Gears -- 5.1.4.Geometry of Bevel Gears -- 5.1.4.1.Fundamentals of Geometry and Manufacture -- 5.1.4.2.Virtual Toothing and Virtual Gears -- 5.1.4.3.Basic Parameters of Straight Bevels -- 5.1.4.4.Design of Bevel Teeth -- 5.1.4.5.Undercut, Profile Shift -- 5.1.4.6.Sliding of Bevels -- 5.1.4.7.Contact Ratio of Straight Bevels -- 5.1.5.Geometry of Helical and Spiral Bevels -- 5.1.6.Manufacturing Methods for Bevel Gears -- 5.1.6.1.Straight Bevels Working -- 5.1.6.2.Spiral and Helical Bevel Working -- 5.2.Load Capacity of Bevels -- 5.2.7.Forces in Mesh -- 5.2.2.Pitting Load Capacity -- 5.2.3.Tooth Root Load Capacity -- 5.2.3.1.Scuffing and Micro-Pitting Load Capacities -- 5.3.Elements of Bevel Design -- 5.4.Control and Tolerances of Bevel Gears -- 5.4.1.Pitch Control -- 5.4.2.Radial Runout Control of Toothing -- 5.4.3.Tangential Composite Deviation -- 5.4.4.Tooth Thickness Control -- 5.4.5.Bevel Gear Drawing -- 5.5.Crossed Gear Drives -- 5.5.7.Basic Geometry -- 5.5.2.Speed of Sliding -- 5.5.3.Loads and Load Capacity -- 5.5.3.1.Forces Acting on Crossed Gears -- 5.5.3.2.Efficiency Grade -- 5.5.3.3.Load Capacity of Crossed Gear Pair -- 5.6.List of Symbols -- 5.6.1.Subscripts to Symbols -- 5.6.2.Combined Symbols -- 6.Planetary Gear Trains -- 6.1.Introduction -- 6.1.1.Fundamentals of Planetary Gear Trains -- 6.1.2.Rotational Speeds and Transmission Ratio -- 6.1.3.Features of Planetary Gear Trains -- 6.1.4.Mating Conditions -- 6.1.4.1.Condition of Coaxiality -- 6.1.4.2.Condition of Neighbouring -- 6.1.4.3.Assembly Condition -- 6.1.5.Diagrams of Peripheral and Rotational Speeds -- 6.1.6.Wolf Symbolic -- 6.1.7.Forces, Torques and Power of Planetary Gear Trains -- 6.1.7.1.Peripheral Forces and Torques -- 6.1.7.2.Power and Efficiency -- 6.1.7.3.Branching of Power -- 6.1.7.4.Self-Locking -- 6.2.Special Layouts of Simple Planetary Gear Trains -- 6.2.1.Bevel Differential Trains -- 6.2.2.Planetary Gear Trains with Single Gear Pair -- 6.2.3.Harmonic Drive -- 6.2.4.Differential Planetary Gear Trains -- 6.2.5.Planetary Gear Train of a Wankel Engine -- 6.3.Composed Planetary Gear Trains -- 6.3.1.Compound Planetary Gear Trains -- 6.3.2.Parallel Composed Planetary Gear Trains -- 6.3.3.Coupled Planetary Gear Trains -- 6.3.4.Closed Planetary Gear Trains -- 6.3.5.Reduced Coupled Planetary Gear Trains -- 6.3.6.Reverse Reducers -- 6.3.7.Planetary Gear Boxes -- 6.4.Elements of Planetary Gear Train Design -- 6.4.1.Issues of Planetary Gear Train Design -- 6.4.2.Calculations for Central Gears and Planets -- 6.5.List of Symbols -- 6.5.7.Subscripts to Symbols -- 6.5.2.Combined Symbols -- 7.Worm Gear Drives -- 7.1.Concept, Features, Classification -- 7.2.Geometry and Working of Worm Gear Pair -- and Contents note continued: 7.2.1.Geometry and Working of Worm -- 7.2.1.1.Dimensions of Worm -- 7.2.1.2.Worm Sections -- 7.2.1.3.Worm Working and Shape of Flanks -- 7.2.2.Geometry and Working of Wormwheels -- 7.2.2.1.Wormwheel Geometry -- 7.2.2.2.Wormwheel Working -- 7.2.3.Calculation Values of Worm Gear Pair -- 7.2.3.1.Centre Distance of Worm Gear Pair -- 7.2.3.2.Transmission Ratio and Gear Ratio -- 7.2.3.3.Tip Clearance of Worm Gear Pair -- 7.2.3.4.Contact Ratio of Worm Gear Pair -- 7.2.3.5.Worm Gear Pair Speeds -- 7.3.Control Measures and Tolerances of Worm Gear Pair -- 7.3.1.Control of Worm Measuring Values -- 7.3.1.1.Pitch Control -- 7.3.1.2.Thread Profile Control -- 7.3.1.3.Radial Runout Control -- 7.3.2.Control of Wormwheel Measuring Values -- 7.3.2.1.Pitch Control -- 7.3.2.2.Tooth Profile Control -- 7.3.2.3.Radial Run-Out Control -- 7.3.2.4.Tooth Thickness Control -- 7.3.2.5.Composite Deviation Control -- 7.3.3.Measuring Values Control of Worm Gear Pair -- 7.3.3.1.Centre Distance Control -- 7.3.3.2.Backlash Control -- 7.4.Forces, Power Losses and Efficiency of Worm Gear Drives -- 7.4.1.Forces Acting on Worm Gear Pair -- 7.4.2.Power Losses and Efficiency of Worm Gear Pair -- 7.5.Load Capacity of Worm Gear Pair -- 7.5.1.Wear Load Capacity -- 7.5.1.1.Calculation of Expected Wear -- 7.5.7.2.Permitted Wear -- 7.5.2.Pitting Load Capacity -- 7.5.3.Heating Load Capacity -- 7.5.3.1.Heating Load Capacity at Bath Lubrication -- 7.5.3.2.Heating Load Capacity at Spray Lubrication -- 7.5.4.Wormwheel Bulk Temperature -- 7.5.4.1.Wormwheel Bulk Temperature in Bath Lubrication -- 7.5.4.2.Wormwheel Bulk Temperature in Spray Lubrication -- 7.5.5.Wormwheel Tooth Root Load Capacity -- 7.5.5.1.Shear Stress in Wormwheel Tooth Root -- 7.5.5.2.Shear Fatigue Limit of Wormwheel Tooth -- 7.5.6.Load Capacity for Worm Shaft Deflection -- 7.6.Elements of Worm Gear Drive Design -- 7.6.1.Design Procedure -- 7.6.1.1.Previous Choices -- 7.6.1.2.Dimensioning the Worm Gear Pair -- 7.6.2.Design Details of Worm Gear Drive -- 7.7.List of Symbols -- 7.7.7.Subscripts to Symbols -- 7.7.2.Combined Symbols.
Subject(s)
ISBN
9781119941309 (cloth)
111994130X (cloth)
Bibliography Note
Includes bibliographical references and index.
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