Gear Mechanisms
Gear and Gear Trains
Mechanical and Mechatronics Engineering Department Faculty of Engineering and Technology Multimedia University of Kenya EMG 2310: Gear Mechanisms Third Year First Semester, 2013 BSc. Mechanical Engineering and BSc. Mechatronics Engineering By Dr. Charles M.M. Ondieki
August 2013, Nairobi
Table of Contents
1.0 Gears ....................................................................................................................................... 3 1.1 Advantages and Disadvantages of Gear Drive .................................................................... 3 1.1.1 Advantages ................................................................................................................... 3 1.1.2 Disadvantages .............................................................................................................. 3 1.2 Classification of Toothed Wheels ........................................................................................ 3 1.2.1 According to the position of axes of the shafts ............................................................ 3 1.2.2 According to the peripheral velocity of the gears ........................................................ 4 1.2.3 According to the type of gearing.................................................................................. 4 1.2.4 According to position of teeth on the gear surface ...................................................... 4 1.3 Terms Used in Gears ............................................................................................................ 5 1.4 Condition for Constant Velocity Ratio of Toothed Wheels–Law of Gearing ..................... 6 1.5 Velocity of Sliding of Teeth................................................................................................. 8 1.6 Forms of Teeth ..................................................................................................................... 8 1.6.1 Involute Teeth
Mechanical and Mechatronics Engineering Department Faculty of Engineering and Technology Multimedia University of Kenya EMG 2310: Gear Mechanisms Third Year First Semester, 2013 BSc. Mechanical Engineering and BSc. Mechatronics Engineering By Dr. Charles M.M. Ondieki
August 2013, Nairobi
Table of Contents
1.0 Gears ....................................................................................................................................... 3 1.1 Advantages and Disadvantages of Gear Drive .................................................................... 3 1.1.1 Advantages ................................................................................................................... 3 1.1.2 Disadvantages .............................................................................................................. 3 1.2 Classification of Toothed Wheels ........................................................................................ 3 1.2.1 According to the position of axes of the shafts ............................................................ 3 1.2.2 According to the peripheral velocity of the gears ........................................................ 4 1.2.3 According to the type of gearing.................................................................................. 4 1.2.4 According to position of teeth on the gear surface ...................................................... 4 1.3 Terms Used in Gears ............................................................................................................ 5 1.4 Condition for Constant Velocity Ratio of Toothed Wheels–Law of Gearing ..................... 6 1.5 Velocity of Sliding of Teeth................................................................................................. 8 1.6 Forms of Teeth ..................................................................................................................... 8 1.6.1 Involute Teeth