TOOL INTERFACE DEVICE, STUFF TOOL WITH A TOOL INTERFACE DEVICE AND MACHINE TOOL SYSTEM WITH A STUFF TOOL AND A MACHINE TOOL

Description

State of the art

[0001] A tool interface device for a tool insert has already been proposed for connecting the tool insert to a tool holder of a machine tool, with at least one connection interface to a force-fit and / or form-fit connection to a quick-release clamping device of the tool holder, wherein the connection interface has a recess which is at least partially limited by a limiting edge of the connection interface, and wherein the connection interface has at least one locking element, in particular a clamping wing, for axial locking on the quick-release clamping device and for transmitting a torque in a state of the connection interface arranged on the quick-release clamping device, which at least partially forms the limiting edge.

[0002] A tool interface device is shown in DE 10 2017 213669 A1. Disclosure of the invention

[0003] The invention relates to a tool interface device, in particular an insert tool hub, for a tool to connect the tool to a tool holder of a, in particular portable, machine tool, with at least one connection interface to a force-fit and / or form-fit connection with a quick-release clamping device of the tool holder, wherein the connection interface has a recess which is at least partially limited by a limiting edge of the connection interface, and wherein the connection interface has at least one locking element, in particular a clamping wing, for axial locking on the quick-release clamping device and for transmitting a torque in a state of the connection interface arranged on the quick-release clamping device, which forms the limiting edge at least partially.

[0004] It is proposed that the connection interface has at least one tool mounting coding element spaced apart from the at least one locking element, which at least partially forms the boundary edge and is intended to cooperate with at least one mounting coding element of the tool holder in a state of the connection interface arranged on the tool holder.

[0005] The interface preferably has a tool rotation axis. In particular, when the interface is arranged on the quick-release clamping device, the tool rotation axis coincides with an output axis of the machine tool, especially an output spindle of the machine tool. The tool rotation axis preferably runs at least substantially perpendicular to a principal extension plane of the tool interface device, especially a principal extension plane of the interface. A "principal extension plane" of a component or element can be understood as a plane that is parallel to a largest side face of the smallest possible imaginary cuboid that just completely encloses the component, and in particular passes through the center of the cuboid.The term "essentially perpendicular" can be understood as an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, particularly when viewed in a projection plane, enclose an angle of 90° and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°. The tool rotation axis preferably runs through a geometric center point of the recess of the connection interface, preferably at least essentially perpendicular to a principal extension plane of the recess. In particular, in an operating state in a state of the connection interface arranged on the machine tool, preferably on the tool holder, the tool interface device, in particular the connection interface, rotates and / or oscillates about the tool rotation axis.

[0006] The locking element is preferably designed as a clamping extension, in particular as a clamping wing. The locking element is preferably arranged adjacent to an outer boundary contour of the boundary edge of the connection interface, which defines the recess of the connection interface, particularly when viewed along a circumferential direction of the connection interface. The circumferential direction of the connection interface preferably extends in a plane that is at least substantially perpendicular to the tool rotation axis of the connection interface. The outer boundary contour is preferably designed as a partial circle contour. Viewed along the circumferential direction of the connection interface, the locking element forms an inner boundary contour of the boundary edge. The inner boundary contour is preferably designed as a partial circle contour.In particular, the outer boundary contour is arranged on a circle having a diameter larger than the diameter of the circle on which the inner boundary contour is arranged. The outer boundary contour is preferably arranged concentrically to the inner boundary contour around the tool's axis of rotation. The inner boundary contour is preferably arranged on a circle having a maximum diameter of between 17 mm and 18 mm. The outer boundary contour is preferably arranged on a circle having a maximum diameter of 23 mm, although alternatively, other dimensions that would appear reasonable to a person skilled in the art are also conceivable.

[0007] A principal extent plane of the locking element runs at least substantially parallel to the principal extent plane of the connection interface. "Substantially parallel" here can be understood as an alignment of a direction relative to a reference direction, particularly in a plane, wherein the direction has a deviation from the reference direction of preferably less than 8°, advantageously less than 5°, and most advantageously less than 2°. The tool axis of rotation preferably runs at least substantially perpendicular to the principal extent plane of the locking element. The locking element extends in a plane running at least substantially perpendicular to the tool axis of rotation, preferably from the outer boundary contour to the inner boundary contour.The connection interface preferably comprises two, in particular three, and preferably four locking elements, which are arranged offset from one another along the circumference of the connection interface. However, it is also conceivable that the connection interface comprises a different number of locking elements than two, three, or four, such as six, eight, twelve, or the like. In particular, the locking elements are arranged uniformly distributed along the circumference of the connection interface. However, it is also conceivable that the connection interface has a different number of locking elements than two, three, or four, and / or that the locking elements are arranged unevenly distributed along the circumference of the connection interface.The locking element(s) is / are preferably provided for a form-fit and / or force-fit connection with the quick-release clamping device along a direction that runs at least substantially parallel to the tool axis of rotation and along a direction that runs at least substantially perpendicular to the tool axis of rotation.

[0008] Preferably, the quick-release clamping device is fixed, particularly rotationally fixed, to the machine tool, especially to the output spindle of an output unit of the machine tool. Alternatively, it is conceivable that the quick-release clamping device is detachably mounted to the machine tool, particularly to the output spindle. The quick-release clamping device is preferably designed for the attachment of the tool interface device to the machine tool, particularly without tools. The tool interface device is preferably designed as an insert tool hub. The tool interface device is, particularly when secured to the machine tool by means of the quick-release clamping device, preferably rotatably or oscillatingly, driven by the output spindle.An axial securing of the tool interface device is, in particular, a securing of the tool interface device along an axial direction of the output axis of the output spindle. The quick-release clamping device preferably has, especially when viewed in a plane extending at least substantially perpendicular to the output axis, an outer contour that corresponds to a contour of the connection interface, which is formed by the boundary edge of the connection interface.

[0009] Preferably, the output unit is designed to transmit a rotational and / or oscillating movement about the output axis to an insert tool, which includes the tool interface device and is fixed to the output unit by means of a quick-release clamping device. Preferably, the output unit is operatively connected to a drive unit of the machine tool in a manner known to those skilled in the art, in particular via at least one drive pinion of the drive unit. The output unit comprises, in particular, at least one sleeve and / or at least one hollow shaft, especially a hollow spindle, which forms the output spindle. The rotational and / or oscillating movement of the output unit is preferably generated by an interaction of the output unit with the drive unit of the machine tool, which comprises at least one electric motor or the like.The rotational and / or oscillatory movement of the tool interface device, in a state arranged on the quick-release clamping device, is preferably transferable to the tool interface device, in particular to the locking element, by means of a torque transmission element of the quick-release clamping device.

[0010] Preferably, the tool mounting coding element is designed as a mechanical tool mounting coding element, such as a recess, projection, groove, ridge, embossing, or the like. However, it is also conceivable that the tool mounting coding element is designed as an electronic tool mounting coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (barcode reader, Data Matrix code reader, etc.), or the like, or that the tool mounting coding element is designed as a combination of a mechanical and an electronic tool mounting coding element. Preferably, the tool mounting coding element is designed to interact with at least one mounting coding element of the tool holder according to a key-keyhole principle, particularly in a state of the connection interface arranged on the tool holder.

[0011] Preferably, the connection interface comprises a plurality of tool mounting coding elements, in particular at least two, more preferably at least three, and most preferably at least four. The connection interface preferably comprises the same number of tool mounting coding elements as the number of mounting coding elements of the tool holder. However, it is also conceivable that the connection interface has a number of tool mounting coding elements that differs from, and is in particular greater than, the number of mounting coding elements of the tool holder. The at least one tool mounting coding element can preferably, and in particular in addition to a mounting coding function, be designed or act as a stress relief notch. The at least one tool mounting coding element can preferably, and in particular in addition to a mounting coding function, be provided for centering the connection interface on the quick-release clamping device.Preferably, a mechanical and / or electronic evaluation of the at least one tool mounting coding element is provided for mounting and / or fastening the connection interface to the tool holder, in particular by means of the at least one mounting coding element of the tool holder, in order to preferably enable mounting and / or fastening of the connection interface to the tool holder. It is conceivable that the at least one tool mounting coding element is provided for actuation, in particular for movement, of the at least one mounting coding element of the tool holder device, in particular to enable the release of mounting and / or fastening of the connection interface to the tool holder.Alternatively or additionally, it is conceivable that the connection interface has at least one further tool mounting coding element, in particular an embossing, which is intended to actuate at least one further mounting coding element of the tool holder, which is in particular movably mounted, in particular to move it, in order to enable the release of a mounting and / or fastening of the connection interface to the tool holder.

[0012] Preferably, the at least one tool mounting coding element is arranged at a distance from the at least one locking element when viewed along the circumferential direction of the connection interface. More preferably, the at least one tool mounting coding element is arranged at a distance from the locking element when viewed along the boundary edge. In particular, the at least one tool mounting coding element is arranged on a circle defined by the outer boundary contour of the boundary edge. More preferably, the at least one tool mounting coding element is arranged on the outer boundary contour. The at least one tool mounting coding element is preferably arranged at least substantially completely outside the circle on which the inner boundary contour is arranged, particularly at least in a direction parallel to the tool's axis of rotation.The term "at least substantially completely" can be understood to mean at least 50%, preferably at least 75%, and particularly preferably at least 90% of the total volume, total profile, and / or total mass of an object, especially the tool assembly coding element. The at least one tool assembly coding element is preferably arranged at least substantially completely inside or outside the circle on which the outer boundary contour is arranged, particularly at least when viewed in the direction parallel to the tool's axis of rotation. For example, the at least one tool assembly coding element is arranged at least substantially completely between the circle on which the outer boundary contour is arranged and the circle on which the inner boundary contour is arranged, particularly at least when viewed in the direction parallel to the tool's axis of rotation.The at least one tool assembly coding element forms, in particular, an additional boundary contour. Preferably, the additional boundary contour is arranged at least substantially entirely outside the circle on which the inner boundary contour is arranged, especially at least when viewed in the direction parallel to the tool's axis of rotation. The additional boundary contour is preferably arranged at least substantially entirely inside or outside the circle on which the outer boundary contour is arranged, especially at least when viewed in the direction parallel to the tool's axis of rotation.For example, the additional boundary contour is arranged at least substantially entirely between the circle on which the outer boundary contour is arranged and the circle on which the inner boundary contour is arranged, particularly at least when considered in the direction parallel to the tool rotation axis.

[0013] It is conceivable that the additional boundary contour forms a partial circle contour. The additional boundary contour is, in particular, arranged on a circle having a diameter that is preferably larger than the diameter of the circle on which the inner boundary contour is arranged. It is conceivable that the diameter of the circle on which the additional boundary contour is arranged is larger or smaller than the diameter of the circle on which the outer boundary contour is arranged. For example, the diameter of the circle on which the additional boundary contour is arranged is smaller than the diameter of the circle on which the outer boundary contour is arranged and larger than the diameter of the circle on which the inner boundary contour is arranged.

[0014] The design according to the invention advantageously prevents, to a large extent, incorrect mounting of the tool interface device on the tool holder. It advantageously counteracts the arrangement of tool interface devices on the tool holder that are unsuitable for the safe operation of the machine tool. For example, it advantageously counteracts the arrangement of a tool interface device intended for machine tools with a low maximum speed on a machine tool with a high maximum speed. It advantageously achieves a high level of operator safety.

[0015] It is further proposed that the connection interface has at least one additional locking element, in particular an additional clamping wing, for axial locking on the quick-release clamping device and for transmitting torque in a state of the connection interface arranged on the quick-release clamping device, which at least partially forms the boundary edge, wherein the at least one tool mounting coding element is arranged along the boundary edge in a central area between the locking element and the additional locking element. The at least one additional locking element is, in particular, designed to be at least substantially identical to the locking element. The term "at least substantially identical" is understood to mean, in particular, a design that is identical except for any manufacturing-related differences between the two elements.Alternatively, it is also conceivable that the additional locking element is designed differently from the locking element. The central area extends, in particular, from a center point on the circle on which the outer boundary contour is arranged, between the locking element and the additional locking element along the circle on which the outer boundary contour is arranged. The maximum extent of the central area from the center point along the circle on which the outer boundary contour is arranged is preferably a maximum of 50%, more preferably a maximum of 35%, and most preferably a maximum of 25% of the maximum distance between the locking element and the additional locking element, viewed along the boundary edge, in particular the circle on which the outer boundary contour is arranged.The locking element and the further locking element are preferably arranged adjacent to each other along the circumferential direction of the connection interface, particularly along the boundary edge. In particular, an area between the locking element and the further locking element arranged adjacent to the locking element along the boundary edge is free of other locking elements. By means of the design according to the invention, a secure assembly or fastening coding according to a key-keyhole principle can advantageously be achieved.

[0016] Furthermore, it is proposed that the tool mounting coding element has a recess in its boundary edge. Preferably, the tool mounting coding element is configured as the recess. In particular, the additional boundary contour defines the recess of the tool mounting coding element. The additional boundary contour that defines the recess of the tool mounting coding element is preferably located at least substantially entirely outside the circle on which the outer boundary contour is arranged, particularly at least when viewed in the direction parallel to the tool's axis of rotation. The diameter of the circle on which the additional boundary contour that defines the recess of the tool mounting element is arranged is preferably larger than the diameter of the circle on which the outer boundary contour is arranged.In particular, the additional boundary contour that limits the recess of the tool assembly coding element forms an outermost boundary contour of the boundary edge. The additional boundary contour limiting the recess of the tool assembly coding element has, for example, at least a partially curved profile and / or at least a partially straight, in particular polygonal, profile. A reliable and secure coding can advantageously be achieved by means of the embodiment according to the invention. A reliable and secure coding can advantageously be achieved in a structurally simple manner.

[0017] Furthermore, it is proposed that the tool mounting coding element, particularly in an alternative embodiment, has a projection on its boundary edge. Preferably, the tool mounting element is configured as the projection. In particular, the projection of the tool mounting coding element forms the additional boundary contour. The projection, and preferably the additional boundary contour formed by the projection, is preferably arranged at least substantially entirely within the circle on which the outer boundary contour is arranged, particularly at least when viewed in the direction parallel to the tool's axis of rotation.Preferably, the projection, and in particular the additional boundary contour formed by the projection, is arranged at least substantially entirely outside the circle on which the inner boundary contour is arranged, particularly at least when viewed in the direction parallel to the tool's axis of rotation. In particular, the projection, and preferably the additional boundary contour formed by the projection, is arranged at least substantially entirely between the circle on which the inner boundary contour is arranged and the circle on which the outer boundary contour is arranged, particularly at least when viewed in the direction parallel to the tool's axis of rotation. The diameter of the circle on which the additional boundary contour formed by the projection of the tool mounting element is arranged is preferably smaller than the diameter of the circle on which the outer boundary contour is arranged.The diameter of the circle on which the additional boundary contour, formed by the projection of the tool mounting element, is arranged, is preferably larger than the diameter of the circle on which the inner boundary contour is arranged. The additional boundary contour formed by the projection has, for example, at least a partially curved profile and / or at least a partially straight, in particular polygonal, profile. By means of the embodiment according to the invention, reliable and secure coding can advantageously be achieved.

[0018] Furthermore, it is proposed that the tool mounting coding element has a projection, in particular the one already mentioned, at its boundary edge with an axially projecting component. Specifically, the tool mounting coding element is designed as a projection with an axially projecting component. The locking element has, in particular, a contact surface that is at least substantially parallel to the tool's axis of rotation. The contact surface is preferably designed to interact with the tool holder, in particular the quick-release clamping device, to axially secure the connection interface. The projection protrudes, in particular, from a plane defined by the contact surface of the locking element. By means of the design according to the invention, reliable and secure coding can advantageously be achieved.

[0019] Furthermore, it is proposed that the tool interface device has a surface surrounding the connection interface, the main extent plane of which is spaced apart from a main extent plane of the locking element, in particular the one mentioned above, wherein the projection with axially projecting component is arranged at least substantially entirely between the main extent plane of the surface surrounding the connection interface and the main extent plane of the locking element. By means of the design according to the invention, reliable and secure coding can advantageously be achieved. Damage to the projection with axially projecting component of the tool assembly coding element can advantageously be prevented in a simple design.

[0020] Furthermore, it is proposed that the at least one tool mounting coding element has a maximum extent along a radial axis that is at most equal to the maximum height of the locking element along a radial axis. Preferably, the at least one tool mounting coding element, which is spaced apart from the locking element, has a maximum extent along a direction transverse, and in particular at least substantially perpendicular, to the tool's axis of rotation, especially the radial axis of the connection interface, which is equal to or less than the maximum distance between the circle on which the inner boundary contour is arranged and the circle on which the outer boundary contour is arranged.Using the design according to the invention, a reliable and secure coding can advantageously be achieved.

[0021] Furthermore, a tool insert, in particular the one already mentioned, with a machine tool interface device according to the invention is proposed. The tool insert is designed, for example, as a grinding wheel, a cutting wheel, a roughing wheel, or the like. The machine tool interface device forms, in particular, the tool insert hub of the tool insert. The tool interface device designed as the tool insert hub can be connected to a tool body of the tool insert in a manner known to those skilled in the art, such as by means of a welded connection, an adhesive bond, a riveted connection, a combination of at least two of the aforementioned connections, or the like. Machining elements of the tool insert, such as grinding elements or cutting elements, are preferably arranged on the tool body.The machining elements can have any configuration of grinding or cutting elements that a person skilled in the art would deem appropriate, and can be manufactured using processes well known to a person skilled in the art and / or arranged on the tool body. Advantageously, an insert tool with particularly high assembly reliability can be provided. It is advantageous to prevent the arrangement of insert tools unsuitable for the safe operation of the machine tool on the tool holder. A high level of operator safety can be advantageously achieved.

[0022] Furthermore, a machine tool system is proposed comprising at least one insert tool according to the invention and at least one machine tool, in particular one of those already mentioned, wherein the machine tool has at least one tool holder, in particular one of those already mentioned, with a quick-release clamping device, in particular one of those already mentioned, on which the insert tool is arranged. The machine tool is preferably designed as a portable machine tool. Here, a "portable machine tool" is understood to mean, in particular, a machine tool for machining workpieces that can be transported by an operator without the need for a transport vehicle. The portable machine tool has, in particular, a mass that is less than 40 kg, preferably less than 10 kg, and most preferably less than 5 kg. Preferably, the portable machine tool is designed as an angle grinder.However, it is also conceivable that the portable machine tool has a different configuration that would appear sensible to a person skilled in the art, such as a circular saw, an oscillating machine tool, a grinding machine, or the like. Alternatively, it is also conceivable that the machine tool is designed as a stationary machine tool. The drive unit is arranged in a housing of the machine tool, in particular at least partially in a part of the housing in which the output unit of the tool holder is also located. The drive unit preferably has an axis of rotation that runs at least substantially parallel, and in particular coaxially, to the output axis of the output unit. The drive unit is provided, in particular, for driving the output unit in a manner already known to a person skilled in the art.Preferably, the drive unit is designed to directly drive an output spindle of the output unit. The output spindle is preferably driven by the drive unit to rotate about its output axis. However, it is also conceivable that the output spindle can be driven by the drive unit to oscillate about its output axis. A rotor shaft of the electric motor of the drive unit is preferably fixed to the output spindle. However, it is also conceivable that the rotor shaft is connected to the output spindle via a belt drive, a gear drive, or the like, for the transmission of drive forces and / or drive torques in a manner already known to those skilled in the art.The quick-release clamping device preferably comprises at least one torque transmission element, in particular the one already mentioned, which is rotationally fixed to the output spindle, and at least one locking element, in particular mounted to be movable axially along the output axis. Preferably, the at least one mounting coding element of the tool holder is provided for coding an arrangement or mounting of the tool interface device, in particular the connection interface, on or to the tool holder. More preferably, the at least one mounting coding element is provided for coding an arrangement or mounting of the tool interface device, in particular the connection interface, on or to the tool holder according to a key-and-keyhole principle.Preferably, the at least one mounting coding element is designed as an axial coding element, in particular as an axial coding element acting along a direction that runs at least substantially parallel to the output axis. Preferably, the at least one mounting coding element is provided to code an axial mounting option for the tool interface device, in particular the connection interface, onto the quick-release clamping device. The mounting coding element is preferably designed to at least largely prevent or prevent the tool interface device from being attached to the tool holder if a corresponding tool mounting coding element is not present on the tool interface device.If a corresponding tool mounting coding element is present on the tool holder, fastening is preferably possible by means of a coding release through interaction of the mounting coding element with the corresponding tool mounting coding element of the tool interface device. Preferably, the at least one mounting coding element is arranged on the torque transmission element. Preferably, the at least one mounting coding element is formed integrally with the torque transmission element. However, it is also conceivable alternatively that the at least one mounting coding element is formed separately from the torque transmission element and is fixed to the torque transmission element by means of a connection that would appear sensible to a person skilled in the art. Preferably, the mounting coding element is designed as a mechanical mounting coding element, such as a recess, a projection, a groove, a rib, or the like.However, it is also conceivable that the assembly coding element is designed as an electronic assembly coding element, such as an RFID chip, an NFC chip, a radio wave evaluation device, an electronic reader (barcode reader, Data Matrix code reader, etc.), or that the assembly coding element is designed as a combination of a mechanical and an electronic assembly coding element. The tool assembly coding element is preferably designed to correspond with the assembly coding element. In a design of the assembly coding element as a mechanical assembly coding element, the tool assembly coding element is also designed as a mechanical tool assembly coding element. In a design of the assembly coding element as an electronic assembly coding element, the tool assembly coding element is, for example, also designed as an electronic tool assembly coding element.Further corresponding embodiments of the mounting coding element and the tool mounting coding element, which would appear sensible to a person skilled in the art, are also conceivable. Preferably, the tool holder comprises a plurality of mounting coding elements, in particular at least two, more preferably at least three, and most preferably at least four. Preferably, the mounting coding element arranged on the torque transmission element is arranged on an outer surface of the at least one torque transmission element, in particular one facing away from the output axis. More preferably, the mounting coding element arranged on the torque transmission element is arranged on an outer surface of the torque transmission element that runs at least substantially parallel to the output axis.Preferably, a surface of the mounting coding element arranged on the torque transmission element forms part of the outer surface of the torque transmission element, which runs at least substantially parallel to the output axis. The design according to the invention advantageously prevents incorrect mounting of the insert tool on the tool holder to a large extent. It also advantageously counteracts the need for tool interface devices on the tool holder that are unsuitable for the safe operation of the machine tool. For example, it advantageously counteracts the need for a tool interface device designed for machine tools with a low maximum speed to be used on a machine tool with a high maximum speed.It is advantageously possible to reliably avoid, to a large extent, the placement, in particular of, an unsuitable tool interface device on, or especially onto, the tool holder. A structurally simple design of the assembly coding can be enabled. A compact design can be advantageously achieved.

[0023] It is further proposed that the quick-release clamping device and the connection interface of the tool interface device form a bayonet fitting, in which, when the connection interface is arranged on the quick-release clamping device, the tool mounting coding element, spaced apart from the locking element, interacts with the mounting coding element of the quick-release clamping device. Alternatively, however, other embodiments of the quick-release clamping device that would appear advantageous to a person skilled in the art are also conceivable. For example, the quick-release clamping device could alternatively also have a radially movable torque transmission element and / or at least a radially movable mounting coding element for connection with the connection interface. Using the embodiment according to the invention, incorrect mounting of the insert tool on the tool holder can be advantageously avoided to a large extent.It is advantageous to counteract the need for tool interface devices on the tool holder that are unsuitable for the safe operation of the machine tool. A particularly time-saving and simultaneously safe mounting of the tool interface device on the tool holder can be advantageously achieved.

[0024] The tool interface device, the insert tool, and / or the machine tool system according to the invention are not intended to be limited to the application and embodiment described above. In particular, the tool interface device, the insert tool, and / or the machine tool system according to the invention may, in order to fulfill a function described herein, have a different number of individual elements and components than the number specified herein. Furthermore, values ​​within the specified limits of the value ranges stated in this disclosure shall also be considered disclosed and freely usable. drawing

[0025] Further advantages become apparent from the following description of the drawings. The drawings illustrate three exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0026] They show: Fig. 1 a machine tool system according to the invention with a machine tool and with an insert tool according to the invention in a perspective view, Fig. 2 the insert tool with a tool interface device according to the invention in a top view, Fig. 3 a tool holder of the machine tool with a quick-release clamping device in a perspective view, Fig. 4 a quick-release clamping device in a perspective view in an alternative embodiment, Fig. 5 a part of an insert tool according to the invention with a tool interface device according to the invention in a first alternative embodiment in a top view and Fig. 5 a part of an insert tool according to the invention with a tool interface device according to the invention in a second alternative embodiment in a top view. Description of the exemplary implementations

[0027] Figure 1Figure 1 shows a machine tool system 52a with a tool insert 12a and a portable machine tool 16a. The machine tool 16a has a mass that is less than 40 kg, preferably less than 10 kg, and most preferably less than 5 kg. The portable machine tool 16a is configured as an angle grinder. However, it is also conceivable that the portable machine tool 16a has another configuration that would be considered useful by a person skilled in the art, such as a circular saw, an oscillating machine tool, a grinding machine, or the like. Furthermore, it is also conceivable that the machine tool 16a is configured as a stationary machine tool. The tool insert 12a is, for example, configured as a grinding wheel, a cutting wheel, a roughing wheel, or the like. The machine tool 16a has at least one tool holder 14a.The tool holder 14a includes at least one quick-release clamping device 20a (see also Figure 3). The insert tool 12a is arranged on the quick-release clamping device 20a.

[0028] The quick-release clamping device 20a is fixedly, and in particular rotationally fixed, to the machine tool 16a, specifically to an output spindle 54a of an output unit 58a of the machine tool 16a. Alternatively, it is conceivable that the quick-release clamping device 20a is detachably mounted to the machine tool 16a, specifically to the output spindle 54a. The quick-release clamping device 20a is designed for the attachment, in particular without tools, of a tool interface device 10a of the insert tool 12a to the machine tool 16a. The tool interface device 10a is preferably designed as an insert tool hub. The tool interface device 10a forms, in particular, the insert tool hub of the insert tool 12a.The tool interface device 10a, designed as an insert tool hub, can be connected to a tool body of the insert tool 12a in a manner known to those skilled in the art, such as by means of a welded connection, an adhesive bond, a riveted connection, a combination of at least two of the aforementioned connections, or the like. Machining elements of the insert tool 12a, such as grinding elements or cutting elements, are preferably arranged on the tool body. The machining elements can have any configuration of grinding or cutting elements that appears useful to those skilled in the art and, in particular, can be manufactured and / or arranged on the tool body using manufacturing processes well known to those skilled in the art.

[0029] The tool interface device 10a, particularly when secured to the machine tool 16a by means of the quick-release clamping device 20a, is preferably rotatable or oscillating and driven by the output spindle 54a. The quick-release clamping device 20a has an outer contour, particularly when viewed in a plane extending at least substantially perpendicular to the output axis 38a, which corresponds to a contour of a connection interface 18a of the tool interface device 10a, defined by a boundary edge 24a of the connection interface 18a.

[0030] The output unit 58a is designed to transmit a rotational and / or oscillatory movement about the output axis 38a to the insert tool 12a, which comprises the tool interface device 10a and is fixed to the output unit 58a by means of the quick-release clamping device 20a. The output unit 58a is operatively connected to a drive unit (not shown here) of the machine tool 16a in a manner already known to those skilled in the art. The output unit 58a comprises, in particular, at least one sleeve and / or at least one hollow shaft, especially a hollow spindle, which forms the output spindle 54a. The rotational and / or oscillatory movement of the output unit 58a is preferably generated by the interaction of the output unit 58a with the drive unit of the machine tool 16a, which comprises at least one electric motor or the like.The rotational and / or oscillatory movement of the tool interface device 10a in a state arranged on the quick-release clamping device 20a can be transferred to the tool interface device 10a by means of a torque transmission element 62a of the quick-release clamping device 20a.

[0031] 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 a rotation axis 60a that runs at least substantially parallel, in particular coaxially, 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 those skilled in the art. Preferably, the drive unit is provided for directly driving the output spindle 54a of the output unit 58a. The output spindle 54a can be driven by means of the drive unit to rotate about the output axis 38a of the output spindle 54a. However, it is also conceivable that the output spindle 54a can be driven by means of the drive unit in an oscillating manner around the output axis 38a.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 drive or the like, for the transmission of drive forces and / or drive torques in a manner already known to a person skilled in the art.

[0032] The quick-release clamping device 20a comprises at least the torque transmission element 62a, which is rotationally fixed to the output spindle 54a, and at least one locking element 64a, which is movably mounted, in particular axially along the output axis 38a. The torque transmission element 62a preferably comprises a plurality of torque transmission extensions 66a, 68a (in Figure 3(Only two torque transmission extensions 66a, 68a are shown), in particular at least two, preferably at least three, and especially preferably at least four. The torque transmission extensions 66a, 68a are preferably arranged uniformly along a circumferential direction 70a of the quick-release clamping device 20a on the torque transmission element 62a, in particular according to an n-fold symmetry. The circumferential direction 70a runs in a plane extending at least substantially perpendicular to the output axis 38a.

[0033] The torque transmission element 62a preferably comprises at least one axial locking extension 72a, 74a, 76a, 78a, in particular at least four axial locking extensions 72a, 74a, 76a, 78a (see also Figure 3The axial locking extensions 72a, 74a, 76a, 78a are preferably arranged uniformly along the circumferential direction 70a of the quick-release clamping device 20a on the torque transmission element 62a, particularly according to an n-fold symmetry. The axial locking extensions 72a, 74a, 76a, 78a and the torque transmission extensions 66a, 68a are preferably formed integrally. The axial locking extensions 72a, 74a, 76a, 78a, in particular the contact surfaces of the axial locking extensions 72a, 74a, 76a, 78a facing the housing 56a, cooperate to axially clamp the insert tool 12a with the locking element 64a.Preferably, the insert tool 12a, in particular the connection interface 18a of the tool interface device 10a of the insert tool 12a, is arranged axially along a direction running at least substantially parallel to the output axis 38a in a state secured by means of the quick-clamping device 20a on the output spindle 54a between the axial locking extensions 72a, 74a, 76a, 78a, in particular between the contact surfaces of the axial locking extensions 72a, 74a, 76a, 78a facing the locking element 64a, and the clamping surfaces of the locking element 64a facing the locking element 64a, in particular clamped.In a state clamped between the locking element 64a and the axial locking extensions 72a, 74a, 76a, 78a, the insert tool 12a, in particular the tool interface device 10a of the insert tool 12a designed as an insert tool hub, rests against the torque transmission extensions 66a, 68a along the circumferential direction 70a. The axial locking extensions 72a, 74a, 76a, 78a, viewed in a plane extending at least substantially perpendicular to the output axis 38a, preferably have a teardrop-shaped or triangular shape. The torque transmission extensions 66a, 68a extend from the contact surfaces of the axial securing extensions 72a, 74a, 76a, 78a in the direction of the securing element 64a, in particular along a direction running at least substantially parallel to the output axis 38a.The torque transmission element 62a, viewed in a plane extending at least substantially perpendicular to the output axis 38a, preferably has the shape of a cross with four, in particular, equal-length, legs, wherein the legs of the cross, viewed from the outside inwards, taper conically towards the output axis 38a, and are in particular triangular or teardrop-shaped. The insert tool 12a, in particular the tool interface device 10a of the insert tool 12a designed as an insert tool hub, has a configuration corresponding to the shape of the torque transmission element 62a. However, it is also conceivable that the torque transmission element 62a, viewed in the plane extending at least substantially perpendicular to the output axis 38a, has a different shape that would appear advantageous to a person skilled in the art.

[0034] Preferably, the securing element 64a has one contact edge 80a, in particular four contact edges 80a (see Figure 3, in which only a contact edge 80a is shown), which, in order to transmit a torque in a state of clamping the insert tool 12a by means of the quick-release clamping device 20a, bears against the insert tool 12a, in particular against the tool interface device 10a of the insert tool 12a, which is designed as an insert tool hub. Preferably, the contact edges 80a each define a step of the locking element 64a, which run parallel to the clamping surfaces of the locking element 64a. In particular, the axial locking extensions 72a, 74a, 76a, 78a only partially cover the clamping surfaces, especially when viewed along a direction that runs at least substantially parallel to the output axis 38a. For example, the axial locking extensions 72a, 74a, 76a, 78a cover the clamping surfaces to less than 80%, preferably to less than 60%, and most preferably to 50% or less.Preferably, the insert tool 12a, particularly in an open state of the quick-release clamping device 20a, must be lifted from the clamped state of the insert tool 12a when removing it from the quick-release clamping device 20a and then rotated by an angular range, particularly by 22.5°, and in particular moved out from under the axial locking projections 72a, 74a, 76a, 78a, before the insert tool 12a can be completely removed from the quick-release clamping device 20a.

[0035] The locking element 64a is mounted on the output spindle 54a so as to be translationally movable, particularly along a direction that runs at least substantially parallel to the output axis 38a. The locking element 64a is connected to the output spindle 54a by means of a force-fit and / or positive-locking connection, preventing rotation but allowing axial movement. Preferably, the quick-release clamping device 20a comprises at least one spring element (not shown here) for applying a spring force to the locking 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 as a coil spring. However, it is also conceivable that the spring element has a different design that would appear advantageous to a person skilled in the art. The spring element preferably bears against the locking element 64a at one end.Preferably, the spring element is supported at another end on a housing extension of the housing 56a of the portable machine tool 16a or on a bearing element (not shown here), in particular a rolling bearing, such as a ball bearing or the like, of the output unit 58a. The bearing element is preferably designed to rotatably mount the output spindle 54a in the housing 56a. The spring element is preferably designed to provide an automatic return function for the quick-release clamping device 20a to the closed position and / or to generate a clamping force for the insert tool 12a, in particular after a locking unit (not shown here) of the tool holder 14a has been released.However, it is also conceivable that the quick-release clamping device 20a, alternatively or additionally to the spring element, has at least one actuator for implementing an automatic return function and / or a clamping force for clamping the insert tool 12a. The locking unit secures the quick-release clamping device 20a, particularly in an actuated position. The locking unit is specifically designed to secure the quick-release clamping device 20a in the open position.

[0036] The insert tool 12a comprises the tool interface device 10a for connecting the insert tool 12a to the tool holder 14a of the machine tool 16a. The tool interface device 10a comprises at least the connection interface 18a for a force-fit and / or form-fit connection with the quick-release clamping device 20a (see figure). Figure 2The 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. In a state of the connection interface 18a arranged on the quick-release clamping device 20a, the tool rotation axis 40a coincides with the output axis 38a. The tool rotation axis 40a extends at least substantially perpendicular to a principal extension plane of the tool interface device 10a, in particular a principal extension plane of the connection interface 18a. The tool rotation axis 40a extends, in particular, through a geometric center point of the recess 22a of the connection interface 18a, preferably at least substantially perpendicular to a principal extension plane of the recess 22a.In an operating state in a state of connection interface 18a arranged on the machine tool 16a, preferably on the tool holder 14a, the tool interface device 10a, in particular the connection interface 18a, rotates about the tool rotation axis 40a.

[0037] The connection interface 18a has four locking elements 26a, 30a, 42a, 44a for axial locking on the quick-release clamping device 20a and for transmitting torque when the connection interface 18a is in a state arranged on the quick-release clamping device 20a. Axial locking of the tool interface device 10a is achieved by locking the tool interface device 10a along an axial direction of the output axis 38a of the output spindle 54a. The four locking elements 26a, 30a, 42a, 44a at least partially form the boundary edge 24a. Alternatively, it is also conceivable that the connection interface 18a has one of four different numbers of locking elements 26a, 30a, 42a, 44a, for example only one locking element 26a, 30a, 42a, 44a, two, three or more than four locking elements 26a, 30a, 42a, 44a.

[0038] The locking elements 26a, 30a, 42a, 44a are each designed as clamping wings. The locking elements 26a, 30a, 42a, 44a are arranged, particularly when viewed along a circumferential direction of the connection interface 18a, adjacent to an outer boundary contour 82a of the boundary edge 24a of the connection interface 18a, which defines the recess 22a 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 designed as a pitch circle contour. Viewed along the circumferential direction of the connection interface 18a, the four locking elements 26a, 30a, 42a, 44a form an inner boundary contour 84a of the boundary edge 24a. The inner boundary contour 84a is designed as a partial circle contour.The outer boundary contour 82a is arranged on a circle 86a, which has a diameter larger than the diameter of a circle 88a on which the inner boundary contour 84a is arranged. The outer boundary contour 82a is arranged concentrically to the inner boundary contour 84a around the tool rotation axis 40a. The inner boundary contour 84a is arranged on the circle 86a, which has a maximum diameter of between 17 mm and 18 mm. The outer boundary contour 82a is arranged on the circle 88a, which has a maximum diameter of 23 mm.

[0039] Each of the locking elements 26a, 30a, 42a, 44a has a principal extension plane at least substantially parallel to the principal extension plane of the connection interface 18a. The tool rotation axis 40a is at least substantially perpendicular to the respective principal extension plane of the locking elements 26a, 30a, 42a, 44a. The locking elements 26a, 30a, 42a, 44a each extend in a plane at least substantially perpendicular to the tool rotation axis 40a, starting from the outer boundary contour 82a, in particular circle 86a, to the inner boundary contour 84a, in particular circle 88a. The locking elements 26a, 30a, 42a, 44a are arranged uniformly 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 locking elements 26a, 30a, 42a, 44a are provided for a form-fit and / or force-fit connection with the quick-release clamping device 20a along a direction running at least substantially parallel to the tool rotation axis 40a and along a direction running at least substantially perpendicular to the tool rotation axis 40a.

[0040] The connection interface 18a has four tool assembly coding elements 28a, 46a, 48a, 50a arranged at intervals from the four locking elements 26a, 30a, 42a, 44a. Alternatively, the connection interface 18a may have one of four different numbers of tool assembly coding elements 28a, 46a, 48a, 50a, for example, only one tool assembly coding element 28a, 46a, 48a, 50a, two, three, or more than four tool assembly coding elements 28a, 46a, 48a, 50a. The tool assembly coding elements 28a, 46a, 48a, 50a form at least part of the boundary edge 24a. The tool assembly coding elements 28a, 46a, 48a, 50a are designed to be connected to the interface 18a in a state arranged on the tool holder 14a with four assembly coding elements 90a (in Figure 3(Only one assembly coding element 90a is shown) of the tool holder 14a to interact. The connection interface 18a preferably comprises, depending on the number of assembly coding elements 90a of the tool holder 14a, the same number of tool assembly coding elements 28a, 46a, 48a, 50a. However, it is also conceivable that the connection interface 18a has a number of tool assembly coding elements 28a, 46a, 48a, 50a that differs from the number of assembly coding elements 90a of the tool holder 14a, and in particular is greater than the number of assembly coding elements 90a of the tool holder 14a.

[0041] The tool assembly coding elements 28a, 46a, 48a, 50a are designed as mechanical tool assembly coding elements. Each of these elements has a recess 32a in its boundary edge 24a. Specifically, each of the four tool assembly coding elements 28a, 46a, 48a, 50a is designed as a recess 32a. Alternatively, it is also conceivable that each of the tool assembly coding elements 28a, 46a, 48a, 50a is designed as a projection, a groove, a ridge, an embossing, or the like. Furthermore, it is also conceivable that the tool assembly coding elements 28a, 46a, 48a, 50a are designed as electronic tool assembly coding elements, such as an RFID chip, an NFC chip, a radio wave evaluation device, or an electronic reader (barcode reader, Data Matrix code reader, etc.).) or the like, or that the tool assembly coding elements 28a, 46a, 48a, 50a are each designed as a combination of a mechanical and an electronic tool assembly coding element. The tool assembly coding elements 28a, 46a, 48a, 50a are designed to interact with the assembly coding elements 90a of the tool holder 14a according to a key-keyhole principle, in particular in a state of the connection interface 18a arranged on the tool holder 14a.

[0042] The tool assembly coding elements 28a, 46a, 48a, 50a can preferably, in particular in addition to an assembly coding function, be designed or act as stress relief notches. For the assembly and / or fastening of the connection interface 18a to the tool holder 14a, a mechanical and / or electronic evaluation of the tool assembly coding elements 28a, 46a, 48a, 50a is to be provided, in particular by means of the assembly coding elements 90a of the tool holder 14a, in order to enable the assembly and / or fastening of the connection interface 18a to the tool holder 14a.

[0043] The assembly coding elements 90a of the tool holder 14a are designed to code the arrangement or mounting of the tool interface device 10a, in particular the connecting interface 18a, on or to the tool holder 14a. The assembly coding elements 90a are designed to code the arrangement or mounting of the tool interface device 10a, in particular the connecting interface 18a, on or to the tool holder 14a according to a key-and-keyhole principle. The assembly coding elements 90a are each designed as an axial coding element, in particular as an axial coding element acting along a direction that runs at least substantially parallel to the output axis 38a. The assembly coding elements 90a are designed to code an axial mounting option for the tool interface device 10a, in particular the connecting interface 18a, onto the quick-release clamping device 20a.The assembly coding elements 90a are designed to prevent or largely prevent the tool interface device 10a from being attached to the tool holder 14a if the corresponding tool assembly coding elements 28a, 46a, 48a, 50a are not present on the tool interface device 10a. If the corresponding tool assembly coding elements 28a, 46a, 48a, 50a are present on the tool holder 14a, attachment is preferably possible by means of a coding release through the interaction of the assembly coding elements 90a with the corresponding tool assembly coding elements 28a, 46a, 48a, 50a of the tool interface device 10a.

[0044] 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 also conceivable that the mounting coding elements 90a are formed separately from the torque transmission element 62a and are fixed to the torque transmission element 62a by means of a connection that would appear sensible to a person skilled in the art. The mounting coding elements 90a are designed as mechanical mounting coding elements. The mounting coding elements 90a are designed as projections. Alternatively, it is also conceivable that the mounting coding elements 90a are each designed as a recess, a groove, a rib, or the like.Alternatively, it is also conceivable that the assembly coding elements 90a are designed as electronic assembly coding elements, such as RFID chips, NFC chips, radio wave evaluation devices, electronic readers (barcode readers, data matrix code readers, etc.) or the like, or that the assembly coding elements 90a are designed as a combination of a mechanical and an electronic assembly coding element.

[0045] The mounting coding elements 90a arranged on the torque transmission element 62a are located on an outer surface 96a of the at least one torque transmission element 62a, which faces away from the output axis 38a in particular. The outer surface 96a runs 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.

[0046] The tool assembly coding elements 28a, 46a, 48a, 50a are arranged at intervals along the circumferential direction of the connection interface 18a from the locking elements 26a, 30a, 42a, 44a. The tool assembly coding elements 28a, 46a, 48a, 50a are arranged at intervals along the boundary edge 24a from the locking elements 26a, 30a, 42a, 44a. The tool assembly coding elements 28a, 46a, 48a, 50a are arranged on the circle 86a defined by the outer boundary contour 82a of the boundary edge 24a. The tool assembly coding elements 28a, 46a, 48a, 50a are arranged on the outer boundary contour 82a. The tool assembly coding elements 28a, 46a, 48a, 50a are arranged at least substantially completely outside the circle 88a on which the inner boundary contour 84a is arranged, in particular at least considered 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, in particular at least when viewed in the 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 the circle 88a on which the inner boundary contour 84a is arranged, in particular at least when viewed in the direction parallel to the tool rotation axis 40a. The additional boundary contour 92a is arranged at least substantially entirely outside the circle 86a on which the outer boundary contour 82a is arranged, in particular at least when viewed in the direction parallel to the tool rotation axis 40a.

[0047] The additional boundary contour 92a forms a partial circle contour. The additional boundary contour 92a is arranged on a circle 94a, which has a diameter that is preferably larger than the 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 larger than the diameter of the circle 86a on which the outer boundary contour 82a is arranged.

[0048] The tool assembly coding elements 28a, 46a, 48a, 50a are arranged along the boundary edge 24a in a central region between each pair of locking elements 26a, 30a, 42a, 44a. The locking elements 26a, 30a, 42a, 44a are at least substantially identical to one another. Each central region extends from a center point on the circle 86a, on which the outer boundary contour 82a is located, between each pair of locking elements 26a, 30a, 42a, 44a along the circle 86a, on which the outer boundary contour 82a is located.The maximum extent of the respective central area 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 particularly preferably a maximum of 25% of each of two, in particular adjacent, securing elements 26a, 30a, 42a, 44a considered along the boundary edge 24a, in particular the circle 86a, on which the outer boundary contour 82a is arranged.

[0049] The tool assembly coding elements 28a, 46a, 48a, 50a each have a maximum extent along a radial axis that is at most equal to the respective maximum height of the locking elements 26a, 30a, 42a, 44a along a radial axis. The tool assembly coding elements 28a, 46a, 48a, 50a each have a maximum extent along a direction transverse, in particular at least substantially perpendicular, to the tool rotation axis 40a, especially the radial axis of the connection interface 18a, which is less than a 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.Alternatively, it is also conceivable that the tool assembly coding elements 28a, 46a, 48a, 50a each have a maximum extent along a direction transverse, 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.

[0050] The quick-release clamping device 20a and the connection interface 18a of the tool interface device 10a form a bayonet fitting, in which, when the connection interface 18a is arranged on the quick-release clamping device 20a, the tool mounting coding elements 28a, 46a, 48a, 50a, spaced apart from the locking elements 26a, 30a, 42a, 44a, interact with the mounting coding elements 90a of the quick-release clamping device 20a. The quick-release clamping device 20a described here is merely an exemplary quick-release clamping device 20a, and other embodiments of the quick-release clamping device 20a that would appear useful to a person skilled in the art are also conceivable. For example, the quick-release clamping device 20a could alternatively also have a radially movable torque transmission element 62a and / or radially movable mounting coding elements 90a for connection with the connection interface 18a.

[0051] Figure 4Figure 14a shows an alternative tool holder 14a' with at least one quick-release clamping device 20a'. The insert tool 12a can be arranged on the quick-release clamping device 20a'. The quick-release clamping device 20a' corresponds, in particular, at least substantially to the quick-release clamping device from DE 102017214117 A1, so reference is made to DE 102017214117 A1 for a description of the quick-release clamping device 20a'. In contrast to the quick-release clamping device from DE 102017214117 A1, the quick-release clamping device 20a' has at least four assembly coding elements 90a' (In Figure 102017214117 A1). Figure 4 Only two assembly coding elements 90a' are shown).

[0052] The tool mounting coding elements 28a, 46a, 48a, 50a are designed to interact with four mounting coding elements 90a' of the tool holder 14a' in a state of connection interface 18a arranged on the tool holder 14a'. The connection interface 18a preferably comprises the same number of tool mounting coding elements 28a, 46a, 48a, 50a as the number of mounting coding elements 90a' of the tool holder 14a'. However, it is also conceivable that the connection interface 18a has a number of tool mounting coding elements 28a, 46a, 48a, 50a that differs from, and is in particular greater than, the number of mounting coding elements 90a' of the tool holder 14a'.

[0053] In the Figures 5a and 5bTwo further embodiments of the invention are shown. The following descriptions and drawings are essentially limited to the differences between the embodiments, whereby, with regard to identically designated components, in particular components with the same reference numerals, reference is also generally made to the drawings and / or the description of the other embodiments, in particular the Figures 1 to 4 , can be referenced. To distinguish the embodiments, the letter a is the reference numeral of the embodiment in the Figures 1 to 4 recreated. In the exemplary embodiments of the Figures 5a and 5b The letter a is replaced by the letters b and c.

[0054] Figure 5aFigure 1 shows a portion of an insert tool 12b. The insert tool 12b comprises a tool interface device 10b for connecting the insert tool 12b to a tool holder (not shown) of a machine tool (not shown). The tool interface device 10b comprises at least one connection interface 18b for a force-fit and / or form-fit connection with a quick-release clamping device (not shown) of the tool holder. The connection interface 18b has a recess 22b. The recess 22b is at least partially bounded by a limiting edge 24b of the connection interface 18b. The connection interface 18b has four locking elements 26b, 30b, 42b, 44b for axial locking on the quick-release clamping device and for transmitting a torque in a state of the connection interface 18b arranged on the quick-release clamping device.The securing elements 26b, 30b, 42b, 44b form at least part of the boundary edge 24b.

[0055] The connection interface 18b has four tool mounting coding elements 28b, 46b, 48b, 50b arranged at intervals from the locking elements 26b, 30b, 42b, 44b. The tool mounting coding elements 28b, 46b, 48b, 50b form at least part of the boundary edge 24b. The tool mounting coding elements 28b, 46b, 48b, 50b are designed to interact with at least one mounting coding element of the tool holder when the connection interface 18b is arranged on the tool holder. The tool mounting coding elements 28b, 46b, 48b, 50b each have a projection 34b on the boundary edge 24b. In particular, the tool mounting coding elements 28b, 46b, 48b, 50b are each designed as a projection 34b.

[0056] Figure 5bFigure 1 shows a portion of an insert tool 12c. The insert tool 12c comprises a tool interface device 10c for connecting the insert tool 12c to a tool holder (not shown) of a machine tool (not shown). The tool interface device 10c comprises at least one connection interface 18c for a force-fit and / or form-fit connection with a quick-release clamping device (not shown) of the tool holder. The connection interface 18c has a recess 22c. The recess 22c is at least partially bounded by a limiting edge 24c of the connection interface 18c. The connection interface 18c has four locking elements 26c, 30c, 42c, 44c for axial locking on the quick-release clamping device and for transmitting a torque in a state of the connection interface 18c arranged on the quick-release clamping device.The securing elements 26c, 30c, 42c, 44c form at least part of the boundary edge 24c.

[0057] The connection interface 18c has four tool mounting coding elements 28c, 46c, 48c, 50c arranged at intervals from the locking elements 26c, 30c, 42c, 44c. The tool mounting coding elements 28c, 46c, 48c, 50c form at least part of the boundary edge 24c. The tool mounting coding elements 28c, 46c, 48c, 50c are designed to interact with at least one mounting coding element of the tool holder when the connection interface 18c is arranged on the tool holder.

[0058] The tool mounting coding elements 28c, 46c, 48c, 50c each have a projection 34c on the boundary edge 24c with an axially projecting component. Specifically, the tool mounting coding elements 28c, 46c, 48c, 50c are each designed as a projection 34c with an axially projecting component. The locking elements 26c, 30c, 42c, 44c each have contact surfaces 98c that are at least substantially parallel to a tool rotation axis (not shown here). The contact surfaces 98c are designed to interact with the tool holder 14c, particularly the quick-release clamping device 20c, to axially secure the connection interface 18c. The projections 34c each protrude from a plane defined by the contact surfaces 98c.

[0059] The tool interface device 10c has a surface 36c surrounding the connection interface 18c. A principal extent plane of the surface 36c is spaced apart from a principal extent plane of the four locking elements 26c, 30c, 42c, 44c, wherein the projections 34c with axially projecting components are arranged at least substantially entirely between the principal extent plane of the surface 36c surrounding the connection interface 18c and the principal extent planes of the locking elements 26c, 30c, 42c, 44c. The principal extent planes of the locking elements 26c, 30c, 42c, 44c run at least substantially parallel to their contact surfaces 98c.

Claims

1. Tool-interface device (10a; 10b; 10c), in particular an insert-tool hub, for an insert tool (12a; 12b; 12c) for connection of the insert tool (12a; 12b; 12c) to a tool receptacle (14a; 14b; 14c) of an in particular portable power tool (16a; 16b; 16c), having at least one connection interface (18a; 18b; 18c) for force-fitting and / or form-fitting connection to a quick-action clamping device (20a; 20a'; 20b; 20c) of the tool receptacle (14a; 14b; 14c), wherein the connection interface (18a; 18b; 18c) has a cutout (22a; 22b; 22c) which is delimited at least partially by a delimitation edge (24a; 24b; 24c) of the connection interface (18a; 18b; 18c), and wherein the connection interface (18a; 18b; 18c) has at least one securing element (26a; 26b; 26c), in particular clamping vane, for axial securing to the quick-action clamping device (20a; 20a'; 20b; 20c) and for transmission of a torque in a state of the connection interface (18a; 18b; 18c) in which it is arranged on the quick-action clamping device (20a; 20a'; 20b; 20c), which at least one securing element at least partially forms the delimitation edge (24a; 24b; 24c), characterized in that the connection interface (18a; 18b; 18c) has at least one tool-mounting coding element (28a; 28b; 28c) which is arranged spaced apart from the at least one securing element (26a; 26b; 26c) and which at least partially forms the delimitation edge (24a; 24b; 24c) and which is intended to interact, in a state of the connection interface (18a; 18b; 18c) in which it is arranged on the tool receptacle (14a; 14b; 14c), with at least one mounting coding element (90a; 90b; 90c) of the tool receptacle (14a; 14b; 14c).

2. Tool-interface device (10a; 10b; 10c) according to Claim 1, characterized in that the connection interface (18a; 18b; 18c) has at least one further securing element (30a; 30b; 30c), in particular further clamping vane, for axial securing to the quick-action clamping device (20a; 20a'; 20b; 20c) and for transmission of a torque in a state of the connection interface (18a; 18b; 18c) in which it is arranged on the quick-action clamping device (20a; 20a'; 20b; 20c), which at least one further securing element at least partially forms the delimitation edge (24a; 24b; 24c), wherein the at least one tool-mounting coding element (28a; 28b; 28c) is arranged in a central region between the securing element (26a; 26b; 26c) and the further securing element (30a; 30b; 30c) along the delimitation edge (24a; 24b; 24c).

3. Tool-interface device (10a) according to Claim 1 or 2, characterized in that the tool-mounting coding element (28a) has a cutout (32a) in the delimitation edge (24a).

4. Tool-interface device (10b; 10c) according to Claim 1 or 2, characterized in that the tool-mounting coding element (28b; 28c) has a projection (34b; 34c) at the delimitation edge (24b; 24c).

5. Tool-interface device (10c) according to Claim 1 or 2, characterized in that the tool-mounting coding element (28c) has a projection (34c) at the delimitation edge (24c) with an axially protruding component.

6. Tool-interface device (10c) according to Claim 5, characterized by a surface (36c) which surrounds the connection interface (18c) and whose main plane of extent is spaced apart from a main plane of extent of the securing element (26c), wherein the projection (34c) with the axially protruding component is arranged at least substantially completely between the main plane of extent of the surface (36c) surrounding the connection interface (18c) and the main plane of extent of the securing element (26c).

7. Tool-interface device (10a; 10b; 10c) according to one of the preceding claims, characterized in that the at least one tool-mounting coding element (28a; 28b; 28c) has a maximum extent along a radial axis that is at most a value of a maximum height of the securing element (26a; 26b; 26c) along a radial axis.

8. Insert tool (12a; 12b; 12c) having a tool-interface device (10a; 10b; 10c) according to one of the preceding claims.

9. Power-tool system (52a; 52b; 52c) having at least one insert tool (12a; 12b; 12c) according to Claim 8, and having at least one power tool (16a; 16b; 16c) which has at least one tool receptacle (14a; 14b; 14c) with a quick-action clamping device (20a; 20a'; 20b; 20c) on which the insert tool (12a; 12b; 12c) is arranged.

10. Power-tool system (52a; 52b; 52c) according to Claim 9, characterized in that the quick-action clamping device (20a; 20a'; 20b; 20c) and the connection interface (18a; 18b; 18c) of the tool-interface device (10a; 10b; 10c) form a bayonet fastener in the case of which, in a state of the connection interface (18a; 18b; 18c) in which it is arranged on the quick-action clamping device (20a; 20a'; 20b; 20c), the tool-mounting coding element (28a; 28b; 28c) spaced apart from the securing element (26a; 26b; 26c) interacts with the mounting coding element (90a; 90b; 90c) of the quick-action clamping device (20a; 20a'; 20b; 20c).