| 摘要 |
Coupling between a first body (1) with a hole (11) and a cylindrical end zone (15) of a second body (2) comprises end edges of tongues having an inclining position corresponding to a part of a helix. As a consequence, when the body is rotated around the axis relative to the first body, the form of the helix is followed so that an axial relative movement also occurs and the end zone of the second body can be removed from the hole of the first body. Coupling between a first body with a hole, e.g. a cylindrical hole with an axis, and a cylindrical end zone of a second body to be inserted into the hole in an axial insertion direction comprises elastically deformable tongues extending on the surface of the end zone or in the hole. The tongues are fixedly connected to the body and ordered in angularly regular manner, e.g. equidistantly. The free end edges of the tongues lie on the peripheral plane of an imaginary, rotation-symmetrical body having a diameter smaller than the outer diameter of the end zone of the second body or greater than the diameter of the hole. The tongues extend at an angle to the axial direction such that, when the end zone is inserted, they bend in the insertion direction and scrape over the surface with their free edges such that after insertion of the end zone over some distance, the movement in the backward direction relative to the insertion direction is blocked. The end edges of the tongues have an inclining position corresponding to a part of a helix. Consequently, when the second body is rotated around the axis relative to the first body, the form of the helix is followed so that an axial relative movement also occurs and the end zone of the second body can be removed from the hole of the first body. An independent claim is also included for method for establishing a coupling comprising (A) displacing the surface of the related body over some distance in axial direction along the end edges; and (B) displacing the end zone of the second body axially further into the hole by relative rotation of the two bodies. |
