Non-tooth-contact spline

The utility model discloses a spline without tooth contact. The spline comprises a spline shaft, a spline sleeve and a ball body, the spline shaft is embedded in the spline sleeve; a plurality of ball groove rings are arranged at the end, embedded in the spline sleeve, of the spline shaft, and a plurality of ball grooves used for embedding the balls are annularly formed in the side face of each ball groove ring at equal angles; a clamping block is arranged in each ball groove; the ball body is clamped and fixed on the spline shaft through the clamping block; the inner side of the spline housing is provided with key grooves corresponding to the multiple ball grooves respectively. The ball body is a flexible ball; the ball serves as a transmission medium between the spline shaft and the spline housing, the ball is a flexible ball, damage to the spline is converted into damage to the ball, the spline can be effectively prevented from being damaged, and durability is improved; and the ball body can generate micro