Self-locking clamping system for a hollow shaft

A clamping device for a hollow shaft, comprising one or more clamping segments and a tension bolt cooperating with the clamping segments,

• wherein each clamping segment has, at a front end on an outer side of the clamping segment, a front clamping claw, and, on an inner side of the clamping segment cooperating with the tension bolt, a front lug,
• wherein each clamping segment has, at a rear end on an outer side of the clamping segment, a rear clamping claw, and, on an inner side of the clamping segment cooperating with the tension bolt, a rear lug,
• wherein, in a clamping position, the front clamping claw of each clamping segment engages in a clamping groove of the hollow shaft and the rear clamping claw is pressed against a cone of a surrounding part or a spindle,
• wherein, in an open position, the front clamping claw of each clamping segment does not engage in the clamping groove of the hollow shaft,
• wherein, by means of axial displacement, the tension bolt moves the clamping segment or segments from the clamping position into the open position and from the open position to the clamping position,
• wherein the clamping segment or segments perform(s) a first pivoting movement during the transition from the open position to the clamping position, such that the front clamping claws of the clamping segments engage in a positively-locking manner in the clamping groove and form a joint for a subsequent second pivoting movement of the clamping segment or segments,
• wherein, during the second pivoting movement, the rear lugs of the clamping segment or segments slide on a third cone section of the tension bolt and press the rear clamping claws of the clamping segments against the cone of the surrounding part or the spindle and axially clamp the clamping segment or segments, and
• wherein, during a further axial movement of the tension bolt following the second pivoting movement, the rear lugs of the clamping segment or segments slide on a second cone section of the tension bolt, such that a self-locking effect is produced between the clamping segments and the tension bolt, the self-locking effect holding the tension bolt in position by friction between the rear lugs and the second cone section without an external force to maintain the clamping position.