Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 sets of gears. Power is transmitted from a high-speed pinion to a slower-speed gear. Helical gears usually operate with their shafts parallel to one another. Both most common types are the concentric (input and result shafts are in series) and parallel shaft (input and right angle worm gearbox output shafts are offset). Single-stage helical gear reducers are usually used for gear ratios up to about 8:1. Where cheaper speeds and higher ratios are needed, dual, triple, and quadruple gear reduction stages may be used.
Worm Gear Speed Reducers
A single reduction rate reducer can achieve up to a 100:1 decrease ratio in a small package. Referred to as right position drives, these contain a cylindrical worm with screw threads and a worm. With a single begin worm, the worm gear advances only one tooth for each 360-degree convert of the worm. So, regardless of the worm’s size, the gear ratio is the ‘size of the worm equipment to 1′. Higher reduction ratios could be created by using double and triple reduction 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 can be a speed reducer, the torque result increase; if the drive improves speed, the torque result will reduce. Gear drive selection elements include: shaft orientation, speed ratio, design type, character of load, gear rating, environment, mounting position, operating temperature range, and lubrication.