Machine tool having a movable tool carrier, tool carrier and tool holder therefor

A machine tool comprising:

• a movable tool carrier (7) configured to be equipped with tool holders and comprising receptacles (8) for the tool holders (9), wherein each tool holder (9) and tool carrier (7) comprise support surfaces (10, 18) assigned to each other and devices for mounting the tool holder (9) at the tool carrier (7),
• wherein the devices for mounting of the tool holder (9) comprise at least one tie rod (19) extending orthogonal to the support surface of the tool holder or tool carrier and wherein a clamping device is assigned to the tool holder and/or the tool carrier that is configured to engage the respective tie rod and to apply an axial clamping force thereto during a clamping process when the tool holder is inserted in one of the receptacles, the clamping force pressing the support surfaces of the tool holder and the tool carrier onto each other,
• wherein the clamping device comprises a clamping element (22) that is adjustably supported transverse to the tie rod between a clamping position and a release position and that provides a first clamping surface (24),
• a second clamping surface (35) of the tie rod with which the first clamping surface (24) of the clamping element (22) is in self-locking engagement in the clamping position,
• wherein the tie rod is configured to be elastically strained in an axial direction and is strained by means of the first and second clamping surfaces (24, 35) being in engagement with each other in the clamping position of the clamping element (22) to an extent that creates the axial clamping force,
• wherein the clamping element (22) is configured to be coupled with an actuating device (32) assigned to the tool carrier (7) by a coupling (29, 30) controllable depending on movement of the tool carrier (7), wherein the clamping element (22) is adjustable between the clamping position and the release position by the actuating device (32),
• wherein the tool carrier (7) is movable in a machining position for one tool holder arranged on one of its receptacles and in a tool holder change position and the actuating device (32) configured to actuate the clamping element (22) is arranged in the area of the tool holder change position, wherein the actuating device (32) is coupled with the clamping element (22) via a releasable coupling (29, 30), and
• wherein the releasable coupling comprises a first coupling element (29) connected with the clamping element (22), wherein the first coupling element (29) is configured to automatically couple or decouple with a complimentary second coupling element (30) of the actuating device (32) depending on the movement of the tool carrier (7).