Kruviülekanded

Kruviülekanded, also known as screw transmissions or leadscrew mechanisms, are a type of mechanical power transmission system that converts rotational motion into linear motion. They operate by using a rotating screw that engages with a mating nut, causing the nut to move along the axis of the screw. This conversion is achieved through the principle of the inclined plane, where the threads of the screw act as a continuous inclined surface.

The primary components of a kruviülekanded are the screw, which is typically a threaded shaft, and the nut, which is threaded internally to match the screw's threads. As the screw rotates, its threads push against the threads of the nut, creating a force that drives the nut linearly. Conversely, if the nut is held stationary and the screw rotates, the nut will move along the screw. The speed and force of the linear motion are determined by the pitch of the screw's threads and the speed of rotation. A finer pitch results in slower but potentially more precise linear movement, while a coarser pitch leads to faster but less precise movement.

Kruviülekanded are widely used in various applications due to their ability to provide precise linear positioning and high mechanical advantage. They are commonly found in machine tools for linear axes, such as lathes and milling machines, as well as in lifting mechanisms, actuators, and adjusting devices. Their inherent self-locking capability, where the friction between the screw and nut can prevent the load from moving the screw when power is removed, is another significant advantage in many applications. However, they can be susceptible to wear and may require lubrication for optimal performance and longevity.