Yarn winding spindle

A winding spindle for mounting a plurality of yarn winding tubes on a yarn winding machine, comprising

• a rotatable inner tube connected for corotation to a drive shaft,
• an outer tube coaxially surrounding the inner tube in spaced relationship, with the inner tube and the outer tube being connected for corotation,
• a clamping device arranged between the inner tube and the outer tube and including a plurality of clamping elements positioned to extend through openings in the outer tube for engaging the interior of yarn winding tubes which are coaxially mounted on the spindle,
• a plurality of support members arranged between the inner tube and the outer tube in an axially spaced apart arrangement for producing a radially operative clamping force between the inner tube and the outer tube, and
• wherein the outer tube comprises in each of its end regions one or more externally recessed portions, so that the wall thickness in the center region of the outer tube is greater than in the region of the recessed portions.

A winding spindle for mounting a plurality of yarn winding tubes on a yarn winding machine, comprising

• a rotatable inner tube connected for corotation to a drive shaft,
• an outer tube coaxially surrounding the inner tube in spaced relationship, with the inner tube and the outer tube being connected for corotation,
• a clamping device arranged between the inner tube and the outer tube and including a plurality of clamping elements positioned to extend through openings in the outer tube for engaging the interior of yarn winding tubes which are coaxially mounted on the spindle,
• a plurality of support members arranged between the inner tube and the outer tube in an axially spaced apart arrangement for producing a radially operative clamping force between the inner tube and the outer tube,
• wherein the support members are elastically deformable and are arranged for selective movement between a relaxed position wherein the support members do not appreciably engage the outer tube and a deformed position wherein a radially operative clamping force is produced between the inner and outer tubes, and
• wherein each support member includes at least one adjustable clamping element by which the support member is moveable between the relaxed and deformed positions, to thereby facilitate the assembly of the inner and outer tubes when the support members are in their relaxed position.