Tool Interface Device, Insert Tool Comprising a Tool Interface Device, and Machine Tool System Comprising an Insert Tool and a Machine Tool

Abstract

The disclosure relates to a tool interface device for an insertion tool for connecting the insertion tool to a tool holder of a machine tool, having at least one connection interface for connecting to a quick-release device of the tool holder, wherein the connection interface has a recess at least partially bounded by a boundary edge of the connection interface, and wherein the connection interface comprises at least one securing element at least partially forming the boundary edge. It is proposed that the connection interface comprises at least one tool mounting coding element spaced apart from the at least one securing element and at least partially forming the boundary edge and provided for interacting with at least one mounting coding element of the tool holder in a state of the connection interface arranged on the tool holder.

Claims

1. A tool interface device in the form of insertion tool hub, for an insertion tool for connecting the insertion tool to a tool holder of a portable machine tool, comprising: at least one connection interface for a frictional and/or positively locking connection to a quick-release device of the tool holder, wherein the connection interface has a recess bounded at least partially by a boundary edge of the connection interface, the connection interface has a securing element in the form of a wing clamp configured to be axially secured on the quick-release device and configured to transmit a torque in a state of the connection interface on the quick-release device, which at least partially forms the boundary edge, and the connection interface comprises at least one tool mounting coding element spaced apart from the at least one securing element, which at least partially forms the boundary edge and is provided for interacting with at least one mounting coding element of the tool holder in a state of the connection interface arranged on the tool holder.

2. The tool interface device according to claim 1, wherein: the connection interface comprises a further securing element in the form of a further wing clamp configured to be axially secured to the quick-release device and configured to transmit a torque in a state of the connection interface arranged on the quick-release device, said further securing element at least partially forming the boundary edge, and the at least one tool mounting coding element is arranged along the boundary edge in a central region between the securing element and the further securing element.

3. The tool interface device according to claim 1, wherein the tool mounting coding element has a recess in the boundary edge.

4. The tool interface device according to claim 1, wherein the tool mounting coding element comprises a protrusion on the boundary edge.

5. The tool interface device according to claim 1, wherein the tool mounting coding element comprises a protrusion on the boundary edge having an axially protruding component.

6. The tool interface device according to claim 5, wherein: a surface surrounds the connection interface, a main extension plane of which is spaced apart from a main extension plane of the securing element; and, the axially projecting component of the protrusion is arranged at least substantially entirely between the main extension plane of the surface surrounding the connection interface and the main extension plane of the securing element.

7. The tool interface device according to claim 1, wherein the at least one tool mounting coding element has a maximum extent along a radial axis that is at most a value of a maximum height of the securing element along a radial axis.

8. An insertion tool having a tool interface device according to claim 1.

9. A machine tool system having at least one insertion tool according to claim 8 and having at least one machine tool having at least one tool holder having a quick-release device on which the insertion tool is arranged.

10. The machine tool system according to claim 9, wherein: the quick-release device and the connection interface of the tool interface device form a bayonet lock; and the tool mounting coding element is spaced apart from the securing element and interacts with the mounting coding element of the quick-release device in a state of the connection interface mounted on the quick-release device.

Description

DRAWINGS

[0024] Further advantages follow from the description of the drawings hereinafter. Three embodiment examples of the invention are shown in the drawing. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will appropriately also consider the features individually and combine them into additional advantageous combinations.

[0025] Shown are:

[0026] FIG. 1 a machine tool system according to the invention having a machine tool and having an insertion tool according to the invention in a perspective view,

[0027] FIG. 2 the insertion tool having a tool interface device according to the invention in a plan view,

[0028] FIG. 3 a tool holder of the machine tool having a quick-release device in a perspective view,

[0029] FIG. 4 a quick-release device in a perspective view in an alternative embodiment,

[0030] FIG. 5a a part of an insertion tool according to the invention having a tool interface device according to the invention in a first alternative embodiment in a plan view, and

[0031] FIG. 5a a part of an insertion tool according to the invention having a tool interface device according to the invention in a second alternative embodiment in a plan view.

DESCRIPTION OF THE EMBODIMENT EXAMPLES

[0032] FIG. 1 shows a machine tool system 52a having an insertion tool 12a and having a portable machine tool 16a. In particular, the machine tool 16a has a mass that is less than 40 kg, preferably less than 10 kg, and more preferably less than 5 kg. The portable machine tool 16a is formed as an angle grinder. However, it is also alternatively conceivable that the portable machine tool 16a has another configuration that would appear useful to a person skilled in the art, such as a configuration as a circular saw, as an oscillating machine tool, as a grinding machine, or the like. Alternatively, it is also conceivable that the machine tool 16a is configured as a stationary machine tool. For example, the insertion tool 12a is configured as a grinding disc, a cutting disc, a roughing disc, or the like. The machine tool 16a comprises at least one tool holder 14a. The tool holder 14a comprises a quick-release device 20a (see also FIG. 3). The insertion tool 12a is arranged on the quick-release device 20a.

[0033] The quick-release device 20a is fixed, in particular non-rotatable, on the machine tool 16a, in particular on an output spindle 54 of an output unit 58a of the machine tool 16a. Alternatively, it is conceivable that the quick-release device 20a is detachably arranged on the machine tool 16a, in particular on the output spindle 54a. The quick-release device 20a is provided for fastening a tool interface device 10a of the insertion tool 12a to the machine tool 16a, in particular without tools. The tool interface device 10a is preferably formed as an insertion tool hub. In particular, the machine tool interface device 10a forms the insertion tool hub of the insertion tool 12a. The tool interface device 10a formed as an insertion tool hub can be connected to a tool base body of the insertion tool 12a in a manner already known to a person skilled in the art, for example by means of a welded connection, by means of an adhesive connection, by means of a riveted connection, by means of a combination of at least two of the aforementioned connections, or the like. Preferably, machining elements of the insertion tool 12a are arranged on the tool base body, for example grinding elements or cutting elements. The machining elements can have any configuration of grinding elements or cutting elements that would appear to a person skilled in the art to be useful and, in particular, can be manufactured and/or arranged on the tool base body by means of manufacturing processes that are well known to a person skilled in the art.

[0034] The tool interface device 10a can be driven by the output spindle 54a, preferably rotating or oscillating, in particular in a state of the tool interface device 10a secured to the machine tool 16a by means of the quick-release device 20a. The quick-release device 20a, in particular when viewed in a plane extending at least substantially perpendicular to the output axis 38a, has an outer contour designed to correspond with a contour of a connection interface 18a of the tool interface device 10a resulting from a boundary edge 24a of the connection interface 18a.

[0035] Preferably, the output unit 58a is intended to transmit a rotational and/or oscillating movement about the output axis 38a to an insertion tool 12a, which is fixed to the output unit 58a by means of the quick-release device 20a and comprises the tool interface device 10a. The output unit 58a is operatively connected to a power unit (not shown here) of the machine tool 16a in a manner already known to a person skilled in the art. In particular, the output unit 58a comprises at least one sleeve and/or at least one hollow shaft, in particular a hollow spindle, which forms the output spindle 54a. The rotational and/or oscillating movement of the output unit 58a can preferably be generated as a result of interaction between the output unit 58 and the drive unit of the machine tool 16, which comprises at least one electric motor or the like. In a state of the tool interface device 10a arranged on the quick-release device 20a, the rotational and/or oscillating movement can preferably be transmitted to the tool interface device 10a by means of a torque transmitting element 62a of the quick-release device 20a.

[0036] The drive unit is arranged in a housing 56a of the machine tool 16a, in particular at least partially in a part of the housing 56a in which the output unit 58a of the tool holder 14a is also arranged. The drive unit preferably has an axis of rotation 60a that is at least substantially parallel, in particular coaxial, to the output axis 38a of the output unit 58a. The drive unit is provided for driving the output unit 58a in a manner already known to a person skilled in the art. The drive unit is preferably provided for directly driving the output spindle 54a of the output unit 58a. The output spindle 54a can be rotationally driven about the output axis 38a of the output spindle 54a by means of the drive unit. However, it is also conceivable that the output spindle 54a can be driven in oscillation about the output axis 38a by means of the drive unit. A rotor shaft (not shown in detail here) of the electric motor is preferably connected to the output spindle 54a in a rotationally fixed manner. However, it is also conceivable that the rotor shaft is connected to the output spindle 54a via a belt drive, a gear transmission, or the like, for transmitting drive forces and/or drive torques in a manner already known to a person skilled in the art.

[0037] The quick-release device 20a preferably comprises at least the torque transmission element 62a, connected to the output spindle 54 in a rotationally fixed manner and at least one securing element 64a supported displaceably, in particular axially along the output axis 38a. The torque transmission element 62a preferably comprises a plurality of torque transmission projections 66a, 68a (only two torque transmission projections 66a, 68a shown in FIG. 3), in particular at least two, preferably at least three, and more preferably at least four. Preferably, the torque transmission projections 66a, 68a are arranged on the torque transmission element 62a, evenly distributed along a circumferential direction 70a of the quick-release unit 20a, in particular n-symmetrically. The circumferential direction 70a runs in a plane extending at least substantially perpendicular to the output axis 38a.

[0038] The torque transmission element 62a preferably comprises at least one axial securing projection 72a, 74a, 76a, 78a, in particular at least four axial securing projections 72a, 74a, 76a, 78a (see also FIG. 3). The axial securing projections 72a, 74a, 76a, 78a are preferably arranged evenly distributed along the circumferential direction 70a of the quick-release unit 20a on the torque transmission element 62a, in particular n-symmetrically. The axial securing projections 72a, 74a, 76a, 78a and the torque transmission projections 66a, 68a are preferably formed integrally with each other. The axial securing projections 72a, 74a, 76a, 78a, in particular the seating surfaces, which face the housing 56a, of the axial securing projections 72a, 74a, 76a, 78a, interact with the securing element 64a to bring about an axial clamping of the insertion tool 12a. Preferably, the insertion tool 12a, in particular the connection interface 18a of the tool interface device 10 of the insertion tool 12a, is arranged, in particular clamped, axially in a state secured on the output spindle 54a by means of the quick-release unit 20a, along a direction that is at least substantially parallel to the output axis 38a, between the axial securing projections 72a, 74a, 76a, 78a, in particular between the seating surfaces, which face the securing element 64a, of the axial securing projections 72a, 74a, 76a, 78a, and the securing element 64a, in particular the clamping surfaces of the securing element 64a facing the torque transmission element 62a. In a clamped state between the securing element 64a and the axial securing projections 72a, 74a, 76a, 78a, the insertion tool 12a, in particular the tool interface device 10a formed as an insertion tool hub of the insertion tool 12a, is seated on the torque transmission projections 66a, 68a along the circumferential direction 70a. The axial securing projections 72a, 74a, 76a, 78a, as viewed in a plane extending at least substantially perpendicular to the output axis 38a, have preferably a droplet shape or a triangular shape. The torque transmission projections 66a, 68a extend from the seating surfaces of the axial securing projection 72a, 74a, 76a, 78a in the direction of the securing element 64a, in particular along a direction that is at least substantially parallel to the output axis 38a. The torque transmission element 62a, as viewed in a plane extending at least substantially perpendicular to the output axis 38a, preferably has a shape of a cross having four legs, in particular of the same length, wherein the legs of the cross extend conically from the outside in the direction of the output axis 38a, in particular triangular or droplet-shaped. The insertion tool 12a, in particular the tool interface device 10a formed as an insertion tool hub of the insertion tool 12a, has a configuration corresponding to the shape of the torque transmission element 62a. It is also conceivable, however, for the torque transmission element 62a, as viewed in the plane extending at least substantially perpendicular to the output axis 38a, to have a different shape that appears to be useful to a person skilled in the art.

[0039] Preferably, the securing element 64a comprises a seating edge 80a, in particular four seating edges 80a (see FIG. 3, in which only one seating edge 80a is shown), the seating edge(s) abutting the insertion tool 12a, in particular the tool interface device 10a formed as a tool insertion hub of the insertion tool 12a, so as to transmit a torque in a state of the insertion tool 12a clamped by the quick-release unit 20a. Preferably, each of the seating edges 80a delimits a step of the securing element 64a, the respective steps being parallel to the clamping surfaces of the securing element 64a. In particular, the axial securing projections 72a, 74a, 76a, 78a cover the clamping surfaces only partially, in particular as viewed along a direction extending at least substantially parallel to the output axis 38a. For example, the axial securing projections 72a, 74a, 76a, 78a cover less than 80%, preferably less than 60%, and more particularly preferably 50% or less, of the clamping surfaces. Preferably, the insertion tool 12a, in particular in an open state of the quick-release unit 20a, must be raised starting from a clamped state of the insertion tool 12a when removed from the quick-release unit 20a, and then rotated by an angular range, in particular by 22.5, in particular displaced forward under the axial securing projections 72a, 74a, 76a, 78a, before the insertion tool 12a can be fully removed from the quick-release unit 20a.

[0040] The securing element 64a is mounted translationally displaceably on the output spindle 54a, in particular along a direction extending at least substantially parallel to the output axis 38a. The securing element 64a is connected to the output spindle 54a in a rotationally fixed but axially displaceable manner by means of a frictional and/or positive connection. Preferably, the quick-release unit 20a comprises at least one spring element (not shown here) for applying a spring force to the securing element 64a, in particular a spring force acting along the output axis 38a, preferably in the direction of the torque transmission element 62a. Preferably, the spring element is designed as a compression spring, in particular a spiral compression spring. However, another configuration of the spring element that would appear sensible to a person skilled in the art is also conceivable. It is preferable for one end of the spring element to be supported on the securing element 64a. Preferably, another end of the spring element is supported on a housing projection of the housing 56a of the portable machine tool 16a or at a bearing element (not shown here), in particular a rolling bearing, for example such as a ball bearing or the like, of the output unit 58a. The bearing element is preferably provided to rotatably support the output spindle 54a in the housing 56a. The spring element is preferably provided to realize an automatic reset function of the quick-release unit 20a in the closed state and/or to induce a pressing force to effect a clamping of the insertion tool 12a, in particular after a disengagement of a detent unit (not shown here) of the tool holder 14a. It is also conceivable, however, that the quick-release unit 20a, alternatively or in addition to the spring element, may comprise at least one actuator for forming an automatic reset function and/or a pressing force to effect a clamping of the insertion tool 12a. The latching unit secures the quick-release device 20a in particular in an actuated position. The latching unit is particularly provided to secure the quick-release device 20a in the open state.

[0041] The insertion tool 12a comprises the tool interface device 10a for connecting the insertion tool 12a to the tool holder 14a of machine tool 16a. The tool interface device 10a comprises at least the connection interface 18a for a frictional and/or positive connection to the quick-release device 20a (see also FIG. 2). The connection interface 18a has a recess 22a. The recess 22a is at least partially bounded by the boundary edge 24a of the connection interface 18a. The connection interface 18a has a tool rotation axis 40a. The tool rotation axis 40a coincides with the output axis 38a in a state of the connection interface 18a arranged on the quick-release device 20a. Preferably, the tool rotation axis 40a is at least substantially perpendicular to a main extension plane of the tool interface device 10a, in particular a main extension plane of the connection interface 18a. The tool rotation axis 40a preferably passes through a geometrical center point of the recess 22a of the connection interface 18a, preferably at least substantially perpendicular to a main extension plane of the recess 22a. In an operating state in state of the connection interface 18a arranged on the machine tool 16a, preferably on the tool holder 14a, the tool interface device 10a, particularly the connection interface 18a, rotates and/or oscillates about the tool rotation axis 40a.

[0042] The connection interface 18a comprises four securing members 26a, 30a, 42a, 44a for axially securing on the quick-release device 20a and for transmitting a torque in a state of the connection interface 18a arranged on the quick-release device 20a. An axial securing of the tool interface device 10a is brought about in particular by securing the tool interface device 10a along an axial direction of an output axis 38a of the output spindle 54a. The four securing elements 26a, 30a, 42a, 44a at least partially form the boundary edge 24a. Alternatively, it is also conceivable that connection interface 18a may comprise one of four different quantities of securing elements 26a, 30a, 42a, 44a, for example, only one securing element 26a, 30a, 42a, 44a, two, three, or more than four securing elements 26a, 30a, 42a, 44a.

[0043] The securing elements 26a, 30a, 42a, 44a are each configured as wing clamps. The securing elements 26a, 30a, 42a, 44a are preferably arranged adjacent to an outer boundary contour 82a of the boundary edge 24a of the connection interface 18a bounding the recess 22a of the connection interface 18a, particularly when viewed along the circumferential direction of the connection interface 18a. The circumferential direction of the connection interface 18a runs in a plane extending at least substantially perpendicular to the tool rotation axis 40a of the connection interface 18a. The outer boundary contour 82a is preferably designed as a partial circle contour. The four securing members 26a, 30a, 42a, 44a form an inner boundary contour 84a of the boundary edge 24a when viewed along the circumferential direction of the connection interface 18a. The inner boundary contour 84a is preferably formed as a partial circle contour. The outer boundary contour 82a is arranged on a circle 86a having a diameter that is greater than a diameter of a circle 88a on which the inner boundary contour 84a is arranged. The outer boundary contour 82a is preferably arranged concentrically to the inner boundary contour 84a about the tool rotation axis 40a. The inner boundary contour 84a is preferably arranged on the circle 86a having a maximum diameter of between 17 mm and 18 mm. The outer boundary contour 82a is preferably arranged on the circle 88a having a maximum diameter of 23 mm.

[0044] A main extension plane of each of the securing elements 26a, 30a, 42a, 44a runs at least substantially parallel to the main extension plane of the connection interface 18a. The tool rotation axis 40a preferably extends at least substantially perpendicular to the main extension plane of each of the securing elements 26a, 30a, 42a, 44a. The securing elements 26a, 30a, 42a, 44a each extend in a plane extending at least substantially perpendicular to the tool rotation axis 40a starting from the outer boundary contour 82a, in particular the circle 86a, up to the inner boundary contour 84a, in particular the circle 88a. The securing elements 26a, 30a, 42a, 44a are arranged evenly distributed along the circumferential direction of the connection interface 18a. However, it is also conceivable that the securing elements 26a, 30a, 42a, 44a are arranged unevenly distributed along the circumferential direction of the connection interface 18a. The securing elements 26a, 30a, 42a, 44a are preferably provided for a positive and/or frictional connection to the quick-release device 20a along a direction running at least substantially parallel to the direction of the tool rotation axis 40a and along a direction at least substantially perpendicular to the tool rotation axis 40a.

[0045] The connection interface 18a comprises four tool mounting coding elements 28a, 46a, 48a, 50a spaced apart from the four securing elements 26a, 30a, 42a, 44a. Alternatively, it is also conceivable that connection interface 18a may comprise one of four different quantities of tool mounting coding elements 28a, 46a, 48a, 50a, for example, only one tool mounting coding element 28a, 46a, 48a, 50a, two, three, or more than four tool mounting coding elements 28a, 46a, 48a, 50a. The tool mounting coding elements 28a, 46a, 48a, 50a at least partially form the boundary edge 24a. The tool mounting coding elements 28a, 46a, 48a, 50a are provided to interact with four mounting coding elements 90a (only one mounting coding element 90a is shown in FIG. 3) of the tool holder 14a in a state of the connection interface 18a arranged on the tool holder 14a. The connection interface 18a preferably comprises an identical quantity of tool mounting coding elements 28a, 46a, 48a, 50a depending upon a quantity of mounting coding elements 90a of the tool holder 14a. However, it is also conceivable that the connection interface 18a has a quantity of tool mounting coding elements 28a, 46a, 48a, 50a different from, in particular greater than, a quantity of mounting coding elements 90a of the tool holder 14a.

[0046] The tool mounting coding elements 28a, 46a, 48a, 50a are configured as mechanical tool mounting coding elements. The tool mounting coding elements 28a, 46a, 48a, 50a each have a recess 32a in boundary edge 24a. More particularly, the four tool mounting coding elements 28a, 46a, 48a, 50a are each configured as a recess 32a. Alternatively, it is also conceivable that the tool mounting coding elements 28a, 46a, 48a, 50a are each configured as a protrusion, a groove, a land, an embossment, or the like. Furthermore, it is also alternatively conceivable that the tool mounting coding elements 28a, 46a, 48a, 50a are configured as electronic tool mounting coding elements, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (bar code reader, a data matrix code reader, etc.), or the like, or that the tool mounting coding elements 28a, 46a, 48a, 50a are each configured as a combination of a mechanical and an electronic tool mounting coding element. The tool mounting coding elements 28a, 46a, 48a, 50a are provided to interact with the mounting coding elements 90a of the tool holder 14a, in accordance with a key/keyhole principle, in particular in a state of the connection interface 18a arranged on the tool holder 14a.

[0047] The tool mounting coding elements 28a, 46a, 48a, 50a can be preferably configured or act as a stress-relief notch, in particular in addition to a mounting coding function. A mechanical and/or electronic evaluation of the tool mounting coding elements 28a, 46, 48a, 50a for assembly and/or fastening of the connection interface 18 to the tool holder 14 must be provided, in particular by means of the mounting coding elements 90a of the tool holder 14a, preferably in order to enable assembly and/or fastening of the connection interface 18a to the tool holder 14a.

[0048] The mounting coding elements 90a of the tool holder 14a are provided to encode an arrangement or abutting of the tool interface device 10a, in particular the connection interface 18a, at or on the tool holder 14a. The mounting coding elements 90a are provided to encode an arrangement or abutting of the tool interface device 10a, in particular the connection interface 18a, at or on the tool holder 14a according to a key/keyhole principle. The mounting coding elements 90a are each configured as an axial coding element, in particular as an axial coding element in each case acting along a direction at least substantially parallel to the output axis 38a. The mounting coding elements 90a are provided to encode an axial contact possibility of the tool interface device 10a, in particular the connection interface 18a, onto the quick-release device 20a. The mounting coding elements 90a are preferably provided to at least avoid or prevent attachment of the tool interface device 10a to the tool holder 14a to the greatest possible extent in the absence of the corresponding tool mounting coding elements 28a, 46a, 48a, 50a on the tool interface device 10a. In the presence of the corresponding tool mounting coding elements 28a, 46a, 48a, 50a on the tool holder 14a, attachment is preferably possible via interaction of the mounting coding elements 90a with the corresponding tool mounting coding elements 28a, 46a, 48a, 50a of the tool interface device 10a as a result of a coding release.

[0049] The mounting coding elements 90a are arranged on the torque transmission element 62a. The mounting coding elements 90a are formed integrally with the torque transmission element 62a. However, it is alternatively also conceivable that the mounting coding elements 90a are configured separately to the torque transmission element 62a and are fixed to the torque transmission element 62a by means of a connection that appears to be useful to a person skilled in the art. The mounting coding elements 90a are configured as mechanical mounting coding elements. The mounting coding elements 90a are configured as protrusions. Alternatively, it is also conceivable that the mounting coding elements 90a are each configured as recesses, grooves, lands, or the like. Furthermore, it is also conceivable that the tool mounting coding element 90a is configured as an electronic tool mounting coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (bar code reader, a data matrix code reader, etc.), or the like, or that the tool mounting coding element 90a is configured as a combination of a mechanical and an electronic tool mounting coding element.

[0050] The mounting coding elements 90a arranged on the torque transmission element 62a are arranged on an outer surface 96a of the at least one torque transmission element 62a, in particular facing away from the output axis 38a. The outer surface 96a is at least substantially parallel to the output axis 38a. A surface of the mounting coding elements 90a arranged on the torque transmission element 62a forms part of the outer surface 96a.

[0051] The tool mounting coding elements 28a, 46a, 48a, 50a are arranged spaced apart from each of the securing elements 26a, 30a, 42a, 44a, when viewed along the circumferential direction of connection interface 18a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged spaced apart from the securing elements 26a, 30a, 42a, 44a, when viewed along the boundary edge 24a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged on circle 86a defined by the outer boundary contour 82a of the boundary edge 24a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged on outer boundary contour 82a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged at least substantially entirely outside the circle 88a on which the inner boundary contour 84a is arranged, particularly at least when viewed in a direction parallel to the tool rotation axis 40a. The tool mounting coding elements 28a, 46a, 48a, 50a are arranged at least substantially entirely outside the circle 86a on which the outer boundary contour 82a is arranged, particularly at least when viewed in a direction parallel to the tool rotation axis 40a. The tool mounting coding elements 28a, 46a, 48a, 50a form an additional boundary contour 92a. The additional boundary contour 92a is arranged at least substantially entirely outside of the circle 88a on which the inner boundary contour 84a is arranged, particularly when viewed in the direction parallel to the tool rotation axis 40a. The additional boundary contour 92a is arranged at least substantially entirely outside of the circle 86a on which the outer boundary contour 82a is arranged, particularly at least when viewed in the direction parallel to the tool rotation axis 40a.

[0052] The additional boundary contour 92a forms a partial circle contour. The additional boundary contour 92a is arranged on a circle 94a having a diameter preferably greater than a diameter of the circle 88a on which the inner boundary contour 84a is arranged. The diameter of the circle 94a on which the additional boundary contour 92a is arranged is greater than the diameter of the circle 86a on which the outer boundary contour 82a is arranged.

[0053] The tool mounting coding elements 28a, 46a, 48a, 50a are each arranged along the boundary edge 24a in a central region between two of the securing elements 26a, 30a, 42a, 44a. The securing elements 26a, 30a, 42a, 44a are at least substantially identical to each other. The respective center region extends, starting from a center point on the circle 86a on which outer boundary contour 82a is arranged, between two of the securing elements 26a, 30a, 42a, 44a, respectively, along the circle 86a on which the outer boundary contour 82a is arranged. A maximum extent of the respective center region starting from the respective center point along the circle 86a, on which the outer boundary contour 82a is arranged, is preferably a maximum of 50%, preferably a maximum of 35%, and more preferably a maximum of 25%, of two of the particularly adjacent securing members 26a, 30a, 42a, 44a viewed along boundary edge 24a, in particular the circle 86a on which the outer boundary contour 82a is arranged.

[0054] The tool mounting coding elements 28a, 46a, 48a, 50a each have a maximum extent along a radial axis that is a maximum value of a respective maximum height of the securing elements 26a, 30a, 42a, 44a along a radial axis. The tool mounting coding elements 28a, 46a, 48a, 50a each have a maximum extent along a transverse direction, particularly at least substantially perpendicular to the tool rotation axis 40a, in particular the radial axis of the connection interface 18a, which is less than a maximum distance between the circle 88a on which the boundary inner contour 84a is arranged and the circle 86a on which the outer boundary contour 82a is arranged. Alternatively, it is conceivable the tool mounting coding elements 28a, 46a, 48a, 50a each have a maximum extent along a transverse direction, in particular at least substantially perpendicular to the tool rotation axis 40a, in particular, the radial axis of the connection interface 18a, which is equal to the maximum distance between the circle 88a on which the inner boundary contour 84a is arranged and the circle 86a on which the outer boundary contour 82a is arranged or is greater than the maximum distance between the circle 88a on which the inner boundary contour 84a is arranged and the circle 86a on which the outer boundary contour 82a is arranged.

[0055] The quick-release device 20a and the connection interface 18a of the tool interface device 10a form a bayonet lock wherein, in a state of the connection interface 18a arranged on the quick-release device 20a, the tool mounting coding elements 28a, 46a, 48a, 50a respectively spaced apart from the securing elements 26a, 30a, 42a, 44a, interact with the mounting coding elements 90a of the quick-release device 20a. The quick-release device 20a described herein merely depicts an exemplary quick-release device 20a, wherein other configurations that appear to be useful to a person skilled in the art are also conceivable for the quick-release device 20a. For example, the quick-release device 20a could alternatively also comprise a radially displaceable torque transmission element 62a and/or a radially displaceable mounting coding element 90a for connecting to the connection interface 18a.

[0056] FIG. 4 shows an example of an alternative tool holder 14a having at least one quick-release device 20a. The insertion tool 12a can be arranged on the quick-release device 20a. In particular, the quick-release device 20a corresponds at least substantially to the quick-release device from DE102017214117A1, such that DE102017214117A1 is referred to for a description of the quick-release device 20a. In contrast to the t quick-release device from DE102017214117A1, the quick-release device 20a comprises at least four mounting coding elements 90a (only two mounting coding elements 90a are shown in FIG. 4).

[0057] The tool mounting coding elements 28a, 46a, 48a, 50a are provided to interact with four mounting coding elements 90a of the tool holder 14a in a state of the connection interface 18a arranged on the tool holder 14a. The connection interface 18a preferably comprises an identical quantity of tool mounting coding elements 28a, 46a, 48a, 50a depending on a quantity of mounting coding elements 90a of the tool holder 14a. However, it is also conceivable that the connection interface 18a has a quantity of tool mounting coding elements 28a, 46a, 48a, 50a different from, in particular greater than, a quantity of mounting coding elements 90a of the tool holder 14a.

[0058] Two further embodiment examples of the invention are shown in FIGS. 5a and 5b. The following descriptions and the drawings are substantially limited to the differences between the embodiment examples, wherein reference can, in principle, also be made, with respect to identically designated components, in particular with respect to components having the same reference numbers, to the drawings and/or the description of the other embodiment examples, in particular FIGS. 1 to 4. In order to distinguish the embodiment examples, the letter a is appended to the reference numbers of the embodiment example in FIGS. 1 to 4. The letter a is replaced by the letters b and c in the embodiment examples in FIGS. 5a and 5b.

[0059] FIG. 5a shows a portion of an insertion tool 12b. The insertion tool 12b comprises a tool interface device 10b for connecting the insertion tool 12b to a tool holder (not shown here) of a machine tool (not shown here). The tool interface device 10b comprises at least one connection interface 18b for a frictional and/or positive connection to a quick-release device (not shown here) of the tool holder. The connection interface 18b has a recess 22b. The recess 22b is at least partially bounded by a boundary edge 24b of the connection interface 18b. The connection interface 18b comprises four securing members 26a, 30a, 42a, 44a for axially securing on the quick-release device and for transmitting a torque in a state of the connection interface 18b arranged on the quick-release device. The securing members 26b, 30b, 42b, 44b at least partially form the boundary edge 24b.

[0060] The connection interface 18b comprises four tool mounting coding elements 28b, 46b, 48b, 50b spaced from the securing elements 26b, 30b, 42b, 44b. The tool mounting coding elements 28b, 46b, 48b, 50b at least partially form the boundary edge 24b. The tool mounting coding elements 28b, 46b, 48b, 50b are provided to interact with at least one mounting coding element of the tool holder in a state of the connection interface 18b arranged on the tool holder. The tool mounting coding elements 28b, 46b, 48b, 50b each have a protrusion 34b on the boundary edge 24b. More particularly, the tool mounting coding elements 28b, 46b, 48b, 50b are each configured as a protrusion 34b.

[0061] FIG. 5a shows a portion of an insertion tool 12c. The insertion tool 12c comprises a tool interface device 10c for connecting the insertion tool 12c to a tool holder (not shown here) of a machine tool (not shown here). The tool interface device 10c comprises at least one connection interface 18c for a frictional and/or positive connection to a quick-release device (not shown here) of the tool holder. The connection interface 18c has a recess 22c. The recess 22c is at least partially bounded by a boundary edge 24c of the connection interface 18c. The connection interface 18c comprises four securing members 26c, 30c, 42c, 44c for axially securing on the quick-release device and for transmitting a torque in a state of the connection interface 18c arranged on the quick-release device. The securing members 26c, 30c, 42c, 44c at least partially form the boundary edge 24c.

[0062] The connection interface 18c comprises four tool mounting coding elements 28c, 46c, 48c, 50c spaced apart from the securing elements 26c, 30c, 42c, 44c. The tool mounting coding elements 28c, 46c, 48c, 50c at least partially form the boundary edge 24c. The tool mounting coding elements 28c, 46c, 48c, 50c are provided to interact with at least one mounting coding element of the tool holder in a state of the connection interface 18c arranged on the tool holder.

[0063] The tool mounting coding elements 28c, 46c, 48c, 50c each have a protrusion 34c at the boundary edge 24c having an axially projecting component. More particularly, the tool mounting coding elements 28c, 46c, 48c, 50c are each configured as a protrusion 34c having an axially projecting component. The securing members 26c, 30c, 42c, 44c each have at least substantially parallel contact surfaces 98c relative to a tool rotation axis (not shown here). The contact surfaces 98c are provided to interact with the tool holder 14c, in particular the quick-release device 20c, in order to axially secure the connection interface 18c to the tool holder 14c, in particular the quick-release device 20c. The protrusions 34c each protrude from a plane defined by the contact surfaces 98c.

[0064] The tool interface device 10c has a surface 36c surrounding the connection interface 18c. A main extension plane of the surface 36c is spaced apart from a main extension plane of the four securing elements 26c, 30c, 42c, 44c, wherein the protrusions 34c having axially projecting components are arranged at least substantially entirely between the main extension plane of the surface 36c surrounding the connection interface 18c and the main extension planes of the securing elements 26c, 30c, 42c, 44c. The main extension planes of the securing elements 26c, 30c, 42c, 44c are at least substantially parallel to the contact surfaces 98c thereof.