| 摘要 |
According to the present invention, a rolling element 7 for rotating upon relative movement of both shafts 1 and 2 in the axial direction is disposed between three pairs of axial grooves 3 and 5 which are formed on the outer peripheral surface of the male shaft 1 and on the inner peripheral surface of the female shaft 2 , respectively, a raceway surface element 9 which is in contact with the rolling element 7 and an elastic member 10 for pressurizing the rolling element 7 against the male shaft 1 and the female shaft 2 through the raceway surface element 9 are interposed between the axial groove 3 on the male shaft side 1 and the rolling element 7 , and a sliding member 8 for slidably moving upon relative movement of the both shafts 1 and 2 in the axial direction is disposed between another three pairs of axial grooves 4 and 6 which are formed on the outer peripheral surface of the male shaft 1 and on the inner peripheral surface of the female shaft 2 , respectively.
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