Design of the self-braking rack-and-gear drives

To fix the output link of a machine unit in the given position and to exclude its spontaneous motion (especially in the hoisting machines) under the action of a load, the drive is usually equipped with a brake. In many cases, it is possible to avoid using a special braking device, if a self-braking mechanism is included in the drive, as it combines functions of transmitting motion and automatic braking after switching off the engine. This solution makes it possible to obtain a simple, lightweight and compact design, as well as to reduce its cost by eliminating the brake. However, this method of the output link braking is used very rarely in most modern drives of the machines and devices, since design of the self-braking mechanisms is a little-studied topic. The paper considers a method for designing a self-braking rack-and-gear drive. It provides an example of its synthesis according to the specified force and kinematic characteristics at the input link.
EDN: WXDDRC, https://elibrary/wxddrc

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