variable speed gearbox

Gearboxes and acceleration reducers are mechanical speed reduction equipment used in automation control systems.

Rate reducers are mechanical products generally used for two purposes. The primary use can be to multiply the quantity of torque produced by an input power source to increase the amount of usable work. They also reduce the input power supply speed to achieve desired output speeds.

Gearboxes are used to increase torque while reducing the velocity of a prime mover result shaft (a motor crankshaft, for example). The output shaft of a gearbox rotates at a slower rate than the input shaft, which reduction in velocity produces a mechanical benefit, raising torque. A gearbox can be set up to do the opposite and offer a rise in shaft swiftness with a reduced amount of torque.

Enclosed-drive speed reducers, also known as gear drives and gearboxes, have two main configurations: in-line and right angle which use different types of gearing. In-line models are commonly made up of helical or spur gears, planetary gears, cycloidal mechanisms, or harmonic wave Variable Speed Gearbox generators. Correct angle designs are usually made with worm gearing or bevel gearing, though hybrid drives are also obtainable. The type of software dictates which acceleration reducer design will best fulfill the requirements.
D- Drive is a variable acceleration geared motor, robust step less unit suitable for numerous industrial applications.The machine is made to provide low output speed at corresponding high output torque. The drive unit is manufactured from standard components and comprises of AC squirrel cage motor, variable quickness drive and gearbox with case hardened profile ground helical gears. It can be very easily adapted to any machine design. The machine is very compact and save time and money because they are ready to fit drive modules. The interior part of this drive may be the variable acceleration pulley enclosed in a housing and connected to the gearbox and engine. The speed variation can be achieved by means of a hand wheel. Average life to be likely is about 10 years before major maintenance. Belt life is based on app and environment. General experience is about three to four 4 years life.
The Ring-cone is a mechanical adjustable speed drive employing a ring and cone friction power train – hence the name. The inner drive assembly includes an insight disc, a set of planetary cones, a control ring, the cam disc and a pressure control cam. The Ring-cone has different sizes to handle motor power ranging between 1/4HP – 20HP, and nominal output torque ratings spanning 15 – 130,000 in-lbs. This original drive provides a speed selection of 0 – 800 RPM, and a cam system that adjusts to the surroundings downstream and will withstand a certain amount of shock load.

With a variable frequency drive, the output torque continues to be continuous from base speed down to the low limit, whatever it may be for the application. However, with the Ring-cone mechanical adjustable speed drive the output torque improves as the rate drops. At the reduced speed range, the output torque methods 500% of the electric motor rating providing huge breakaway torque values. The mechanical drive can be capable of handling a 200% overload capability throughout the entire speed range. This performance advantage allows the user to set a low speed that will help the drive package force through difficult areas.
For lower velocity/higher torque applications, some Zero-Max drives are available with our right angle gearbox. Some Zero-Max drives could be purchased with regular electric motors or they may be linked to any rotating power source up to 2000 RPM. Adjustable speed drive rate adjustments are easily made by moving a lever control via an arc or turning the hand-wheel of a screw type control. In either case, easy and precise speed control settings are possible with Zero-Max adjustable acceleration drives – also described interchangeably as variable quickness drives.


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