Causes of tooth fracture
A broken tooth is usually formed by the gradual extension of a fine crack. According to the crack growth and fracture reasons, the fracture can be divided into overload fracture (including impact fracture), fatigue fracture and random fracture.
Overload fracture is always caused by the stress acting on the tooth exceeding its ultimate stress, resulting in rapid expansion of the crack. Common causes include sudden impact overload, bearing damage, shaft bending or large hard objects squeezing into the mesh area. The fracture surface of the broken tooth has a crack growth area with radiative pattern. After careful inspection, we can see the defect of the material, the precision of tooth surface is too poor, and the root of tooth is not processed. In the design, necessary measures should be taken to fully consider the prevention of overload. Prevent the box body from deformation, prevent hard foreign matter into the box body and so on.
Structural features of gear shaft