What is an anti backlash nut?
What is an anti backlash nut?
Axial anti-backlash nuts consist of a main nut body and a secondary ring that share the same thread form. There is a spring between the two components that force each part against opposing flanks of the screw thread. This biasing takes up the clearance between all the components, i.e., gets rid of the backlash.
How can backlash be overcome?
The simplest and most common way to reduce backlash in a pair of gears is to shorten the distance between their centers. This moves the gears into a tighter mesh with low or even zero clearance between teeth. It eliminates the effect of variations in center distance, tooth dimensions, and bearing eccentricities.
How do you reduce backlash in ball screws?
Axial play, or backlash, is caused by clearance between the balls and raceways. Using oversized balls in the ball nut can reduce or eliminate backlash.
Is backlash good or bad?
Proper amount of back lash is given for smooth running of the gears. No backlash means the gears need to manufactured with very high degree of accuracy. Backlash provides better lubrication.
What is an anti loosening nut?
Anti-loosening structures in the form of a nut include adding a regular nut or changing the shape of a regular nut, for example, double nuts, eccentric double nuts, wedge locking nut, prevailing torque nut, and ratcheted nut, as shown in Fig.
What is preloading of ball screw?
Preload is the elimination of internal clearance between the rail and carriage or between the ball screw and ball nut. This makes the system more rigid by creating a load on the linear guide or ball screw, which reduces deflection when an external force is applied.
What is pinion depth?
Pinion Depth – The distance from the face of the pinion gear to the centerline of the ring gear. This is adjusted by adding or subtracting shims to the inner pinion bearing. This is adjusted by shims and/or a crush sleeve. 3. Backlash – The distance between the mating surfaces of the ring and pinion gears.
Why is backlash needed?
Backlash is necessary to provide the running clearance needed to prevent binding of the mating gears, which can result in heat generation, noise, abnormal wear, overload, and/or failure of the drive.
