Spring Motor Solutions – Using Multiple Motors in Tandem for Heavy Loads

Many modern designs and devices wish to minimize space but retain functionality. This often means that devices with self-closing shutters, or doors and hoods that close themselves, require a small package that provides a high level of torque.

By using multiple spring motors in tandem the torque force provided can be amplified, meaning heavy loads can be counterbalanced using only a small array of springs.

When there is a requirement for high torque, and if limited space is a concern, then several NEG’ATOR spring motors can be combined and backwound on a single output drum to increase the motor’s torque. They can be used to drive, counterbalance, or retrieve heavy loads.

a cartoon weight and spring

In cases where the required angular deflection is less than 180 degrees, multiple spring layers in the NEG’ATOR spring motor can be stored on a single storage drum and backwound onto a single output drum to further reduce the size of the spring mechanism.

a mechanism

Spring Motor Assemblies (NEG'ATOR)

NEG'ATOR spring motor assemblies from Hunter Spring are composed of single or double NEG'ATOR constant force springs mounted on either one or two storage drums and a single output drum with an integral cable reel. The entire assembly is mounted on a metal base plate.

some springs on a piece of metal

These assemblies can deliver a nearly constant linear force and can be readily installed using the mounting holes provided in them. They can be readily mounted into user’s assembly or equipment to provide a nearly constant cable tension force.

Hunter Spring’s spring motor assemblies are made from 301 High Yield Stainless Steel. Upon request, the company can also use other materials such as Inconel, Elgiloy, or high-carbon steel for custom applications.

Hunter Spring offers standard spring motor solutions. Customers can refer to the company’s Selection Guide for more information about specific models.

Spring motor assemblies are also offered as custom design solutions. By using the design worksheet on the company’s website, requirements are easily specified allowing Hunter Spring Application Engineers to quickly design a spring motor assembly that meets specific requirements.

Download the Brochure for More Information

This information has been sourced, reviewed and adapted from materials provided by Hunter Spring.

For more information on this source, please visit Hunter Spring.

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