Time : 2022-03-30 Browse : 21
Gear couplings often use parallel or spiral groove systems to adapt to various deviations and transmit torque. With good performance and price advantages, they are used in many stepper and servo systems. The one-piece design enables it to achieve the advantages of zero-delay torque transmission and maintenance-free.
Spiral grooves are a continuous multi-turn long groove structure on gear couplings. This structure gives the coupling excellent elasticity, can withstand small bearing loads, and can adapt to the correction of angular and axial deviations. However, it has poor ability to handle eccentricity, because the spiral grooves must be bent in two different directions, which will generate greater internal pressure and easily cause premature damage to the coupling.
At the same time, although long spiral groove couplings are easy to bend when subjected to various deviations, they will affect the rigidity of the coupling under torsional loads. Excessive rotation will reduce the accuracy of the coupling and weaken its overall performance.
As a rigid-flexible coupling, the gear tooth coupling consists of an inner ring with the same number of teeth and a flange half coupling with external teeth. The external teeth are of two types: straight teeth and drum teeth. The drum gear coupling allows a larger angular displacement, which can improve the contact conditions of the teeth, increase the torque transmission capacity and service life. Compared with the straight tooth coupling, it has the advantages of compact structure, small turning radius, large load capacity, low noise and long maintenance cycle. The spiral groove design further enriches its characteristics in deviation adaptation and torque transmission.
