Like a compound gear train, planetary trains are used when a large change in speed or power is needed across a small distance. There are four different ways that a planetary train can be hooked up. A planetary gear train is a little more complex than other types of gear trains. In a planetary train…
Simple Gear Train- The simple gear train is used where there is a large distance to be covered between the input shaft and the output shaft. Each gear in a simple gear train is mounted on its own shaft. When examining simple gear trains, it is necessary to decide whether the output gear will turn…
A gear train is formed by mounting gears on a frame so that the teeth of the gears engage. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping; this provides a smooth transmission of rotation from one gear to the next. • A gear train is two or more…
First….What is torque? Torque is a twisting force- (it doesn’t do any ‘work’ itself- it is simple an application of energy). Work (or ‘stuff’) happens, when torque is applied and movement occurs. “Torque is a force that tends to rotate or turn things. You generate a torque any time you apply a force using a…
The gear ratio tells us how fast one gear is rotating when compared to another. If our input gear (10 teeth) is rotating at 5 rpms, and it is connected to our output gear (50 teeth), our output gear will rotate at 1 rpms. Why? Our gear ratio is 50:10… or 5:1 If our small gear rotates…
The gear ratio of a gear train is the ratio of the angular velocity of the input gear to the angular velocity of the output gear, also known as the speed ratio of the gear train. The gear ratio can be computed directly from the numbers of teeth of the various gears that engage to form the…
Use of Gears- ● To reverse the direction of rotation ● To increase or decrease the speed of rotation ● To move rotational motion to a different axis ● To keep the rotation of two axis synchronized Advantages of Teeth- ● They prevent slippage between the gears – therefore axles connected by gears are always synchronized exactly with one another….
● Pitch surface: The surface of the imaginary rolling cylinder (cone, etc.) that the toothed gear may be considered to replace. ● Pitch circle: A right section of the pitch surface. ● Addendum circle: A circle bounding the ends of the teeth, in a right section of the gear. ● Root (or dedendum) circle: The circle bounding the spaces between the teeth, in a…
1. Spur Gear 2. Helical Gear 3. Herringbone Gear 4. Bevel Gear 5. Worm Gear 6. Rack and Pinion 7. Internal and External Gear 8. Face Gear 9. Sprockets 1) Spur Gear-Parallel and coplanar shafts connected by gears are called spur gears. The arrangement is called spur gearing. Spur gears have straight teeth and are parallel to the axis of the wheel. Spur gears…
1) Number of teeth 2) Form of teeth 3) Size of teeth 4) Face width of teeth 5) Style and dimension of gear blank 6) Design of the hub of the gear 7) Degree of precision required 8) Means of attaching the gear to the shaft 9) Means of locating the gear axially to the…