Coupling arrangement for tool, and tool comprising coupling arrangement

A coupling arrangement for a tool, the coupling arrangement comprising:

• a drive part rotatable about a rotation axis, the drive part comprising a drive profile;
• a driven part rotatable about the rotation axis, the driven part comprising a driven profile complementary to the drive profile, the driven profile being arranged to mate with the drive profile in a coupled position for torque transfer between the drive part and the driven part, wherein the drive profile and the driven profile each has a polygonal shape;
• and
• an aligning arrangement arranged to force a relative rotation between the drive part and the driven part about the rotation axis during relative movement of the drive part and the driven part along the rotation axis, from a nonaligned state of the coupling arrangement, where the drive profile is not rotationally aligned with the driven profile, towards an aligned state of the coupling arrangement, where the drive profile is rotationally aligned with the driven profile, wherein the aligning arrangement comprises one or more protruding elements, each arranged to exert a torque on the drive profile or on the driven profile in the nonaligned state, wherein the aligning arrangement comprises a spring, wherein the one or more protruding elements are arranged to be moved against the deformation of the spring, and wherein the spring is arranged to force the one or more protruding elements in a radial direction with respect to the rotation axis.

A tool comprising a coupling arrangement for a tool, the coupling arrangement comprising:

• a drive part rotatable about a rotation axis, the drive part comprising a drive profile;
• a driven part rotatable about the rotation axis, the driven part comprising a driven profile complementary to the drive profile, the driven profile being arranged to mate with the drive profile in a coupled position for torque transfer between the drive part and the driven part;
• and
• an aligning arrangement arranged to force a relative rotation between the drive part and the driven part about the rotation axis during relative movement of the drive part and the driven part along the rotation axis, from a nonaligned state of the coupling arrangement, where the drive profile is not rotationally aligned with the driven profile, towards an aligned state of the coupling arrangement, where the drive profile is rotationally aligned with the driven profile, wherein the aligning arrangement comprises one or more protruding elements, each arranged to exert a torque on the drive profile or on the driven profile in the nonaligned state, wherein the aligning arrangement comprises a spring, wherein the one or more protruding elements are arranged to be moved against the deformation of the spring, and wherein the spring is arranged to force the one or more protruding elements in a radial direction with respect to the rotation axis.