Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 pieces of gears. Power is usually transmitted from a high-velocity pinion to a slower-speed equipment. Helical gears generally operate with their shafts parallel to each other. Both most common types will be the concentric (input and result shafts are in range) and parallel shaft (input and output shafts are offset). Single-stage helical gear reducers are typically used for gear ratios up to about 8:1. Where reduce speeds and higher ratios are needed, dual, triple, and quadruple gear reduction stages can be used.
Worm Gear Speed Reducers
A single reduction swiftness reducer can achieve up to 100:1 decrease ratio in a small package. Referred to as right angle drives, these contain a cylindrical worm with screw threads and a worm. With a single begin worm, the worm equipment advances only 1 tooth for each 360-degree turn of the worm. So, whatever the worm’s size, the gear ratio may be the ‘size of the worm equipment to 1′. Higher decrease ratios can be created through the use of double and triple decrease ratios.
Basic Types of Gearboxes
The objective of a gearbox is to improve or reduce speed. Consequently, torque output would be the inverse of the function. If the enclosed drive is a velocity reducer, the torque output increase; if the drive boosts speed, the torque result will reduce. Gear drive selection elements include: shaft orientation, velocity ratio, design type, nature of load, gear ranking, environment, mounting position, working temperature range, and lubrication.
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