Zero clearance transmission shaft assembly

The utility model relates to a zero clearance transmission shaft assembly, it includes ball slip cap, ball, bearing retainer, ball spline shaft, limit snap spring, ball spline shaft one end outer laneis equipped with bearing retainer, and the bearing retainer outer lane is equipped with flower shape limit snap spring, and limit snap spring is equipped with the ball slip cap outward, be equipped with three rows of ball rolling grooves between ball spline shaft and the ball slip cap. The utility model discloses have three rows of ball structures, increase anti -disengaging structure for the ball can not come off yet under the circumstances that bearing retainer damaged, and stability is stronger, and is good to neutrality. 本实用新型涉及的种无间隙传动轴总成，它包括滚珠滑动套、滚珠、轴承保持架、滚珠花键轴、限位卡簧；滚珠花键轴端外圈设有轴承保持架，轴承保持架外圈设有花形限位卡簧，限位卡簧外设有滚珠滑动套；滚珠花键轴和滚珠滑动套之间设有三排滚珠滚动槽。本实用新型具有三排滚珠结构，增加防脱结构，使得轴承保持架损坏的情况下滚珠也不会脱落，稳定性更强，对中性好。