Design principles and characteristics of ball spline

Ball spline uses balls installed in the outer cylinder of the spline shaft to smoothly roll and transmit torque in the precision grinding and rolling groove. Adopting a unique contact point design, the contact angle is larger (40 °). In addition, its load sensitivity can also be greatly improved. The design principle and characteristics of spherical splines are indeed a mystery to ordinary people.

The spherical spline has three rows of loading slots on the outer diameter of the shaft. Due to the use of Gothic arched groove design, it can ensure that all three grooves can simultaneously withstand clockwise or counterclockwise torque, thereby improving their service life and stiffness. The steel balls on the steel ball frame are recycled to prevent them from falling off the spline nut during assembly.
High load capacity
Each groove of the shaft is precisely ground to form a 30 ° angle contact point. Therefore, the model has high bearing capacity in both radial and torque directions.
No corner gap
The preload force in the angular contact structure is provided at a contact angle of 30 degrees. This eliminates angular gaps in the direction of rotation and increases rigidity.
High rigidity
Due to the large contact angle, it can be preloaded appropriately according to the usage situation. Therefore, it can achieve higher stiffness and greater torque.
Ball hugging style
During the assembly process, use a steel ball holder to prevent the steel ball from falling off the spline nut.
application
Robots, transportation equipment, winding machines, ACT (vehicle tool replacement), etc.
Spherical splines are suitable for environments with excessive vibration and impact loads, high positioning accuracy, and high motion performance. In such an environment, it can also play an effective role.